Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/36—Heterocyclic compounds
  • C22B3/362—Heterocyclic compounds of a single type
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B23/00—Obtaining nickel or cobalt
  • C22B23/04—Obtaining nickel or cobalt by wet processes
  • C22B23/0476—Separation of nickel from cobalt
  • C22B23/0484—Separation of nickel from cobalt in acidic type solutions
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/34—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing sulfur, e.g. sulfonium
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/40—Mixtures
  • C22B3/406—Mixtures at least one compound thereof being a heterocyclic compound
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/28—Amines
  • C22B3/284—Aromatic amines

Definitions

• Embodiments of this application relate to the field of chemistry, and more specifically, to an extractant and an application thereof, a nickel removal method and device for a nickel-containing cobalt solution, a cobalt solution, a cobalt element, an electronic component, and an electronic device.
• Cobalt (cobalt, Co) is a type of important strategic metal, and is widely used in the fields of aerospace, motors and electric appliances, machinery, chemistry, ceramic, batteries, and the like.
• High-purity cobalt has an excellent semiconductor property, magnetic property, and conductive property, and is an important material for preparing a magnetic recording medium, a magnetic recording head, a photoelectric device, an integrated circuit of a magnetic sensor, and other components.
• a preparation method for cobalt is generally purifying a cobalt solution by removing impurities from the cobalt solution to obtain a high-purity cobalt solution, and then obtaining high-purity metal cobalt by using an electrolysis method.
• An impurity removal and purification method mainly includes chemical precipitation, ion exchange, and solvent extraction.
• the impurity removal and purification method is mainly used to remove metal impurities (for example, copper, iron, zinc, aluminum, manganese, calcium, magnesium, and nickel) from a cobalt solution.
• metal impurities for example, copper, iron, zinc, aluminum, manganese, calcium, magnesium, and nickel
• properties of cobalt and nickel (nickel, Ni) are similar, it is difficult to deeply remove nickel from the cobalt solution in a conventional technology, resulting in a high nickel content in an obtained cobalt solution, and affecting a purity of finally obtained metal cobalt.
• Embodiments of this application provide an extractant and an application thereof, a nickel removal method and device for a nickel-containing cobalt solution, a cobalt solution, a cobalt element, an electronic component, and an electronic device, so that impurity nickel can be removed from the nickel-containing cobalt solution, to obtain a high-purity cobalt solution.
• an extractant includes at least one of naphthalenesulfonic acid or dialkyl (pyridylmethyl)amine.
• the extractant including at least one of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine may be used, so that nickel in a nickel-containing cobalt solution forms a complex with any one or more of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine, to remove the nickel from the nickel-containing cobalt solution and obtain a nickel-removed cobalt solution.
• R 1 is alkyl
• R 2 is alkyl
• M is any metal salt or a hydrogen ion
• n is a positive integer greater than or equal to 1.
• the naphthalenesulfonic acid may be used, so that the nickel in the nickel-containing cobalt solution forms a complex with the naphthalenesulfonic acid, to remove the nickel from the nickel-containing cobalt solution and separate cobalt and the nickel.
• R 1 is alkyl
• R 2 is alkyl
• the dialkyl (pyridylmethyl)amine may be used, so that the nickel in the nickel-containing cobalt solution forms a complex with the dialkyl (pyridylmethyl)amine, to remove the nickel from the nickel-containing cobalt solution and separate cobalt and the nickel.
• a chemical formula for R 1 is CH 3 (CH 2 ) m
• a chemical formula for R 2 is CH 3 (CH 2 ) p
• m and p are positive integers greater than or equal to 1.
• a value of m is greater than or equal to 8 and less than or equal to 10.
• a value of p is greater than or equal to 8 and less than or equal to 10.
• a concentration of the naphthalenesulfonic acid in the extractant is greater than or equal to 15% and less than or equal to 100%.
• a concentration of the dialkyl (pyridylmethyl)amine in the extractant is greater than or equal to 50% and less than or equal to 100%.
• an extraction rate in extraction of the nickel in the nickel-containing cobalt solution may be adjusted by adjusting the concentration of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine in the extractant.
• An extraction rate corresponding to an extractant including the naphthalenesulfonic acid and the dialkyl (pyridylmethyl)amine is higher than an extraction rate corresponding to an extractant including only one of the naphthalenesulfonic acid and the dialkyl (pyridylmethyl)amine.
• the extractant includes the naphthalenesulfonic acid and the dialkyl (pyridylmethyl)amine
• a higher concentration of the dialkyl (pyridylmethyl)amine in the extractant indicates a higher extraction rate in the extraction of the nickel.
• an application of the extractant according to the first aspect or any possible implementation of the first aspect is provided.
• the extractant is used to remove nickel from a nickel-containing cobalt solution.
• a nickel removal method for a nickel-containing cobalt solution includes: obtaining an organic phase, where the organic phase includes the extractant according to the first aspect or any possible implementation of the first aspect; and performing extraction on the nickel-containing cobalt solution by using the organic phase, to obtain a nickel-removed cobalt solution.
• the organic phase including any one or more of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine may be used, so that nickel in the nickel-containing cobalt solution forms a complex with any one or more of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine and enters the organic phase, to remove the nickel from the nickel-containing cobalt solution and obtain the nickel-removed cobalt solution.
• a capability of any one or more of the naphthalenesulfonic acid or the dialkyl (pyridylmethyl)amine to form a complex with the nickel is strong, so that an extraction rate of the impurity nickel in the nickel-containing cobalt solution can be increased, to obtain a high-purity cobalt solution.
• performing the extraction on the nickel-containing cobalt solution by using the organic phase includes: saponifying the organic phase with a first cobalt solution, to obtain a cobalt-containing saponified organic phase; and performing the extraction on the nickel-containing cobalt solution by using the cobalt-containing saponified organic phase, to obtain the nickel-removed cobalt solution.
• the organic phase may be saponified with the first cobalt solution, to improve a capability of the extractant in the cobalt-containing saponified organic phase to form a complex with the nickel in the nickel-containing cobalt solution, to increase the nickel extraction rate.
• the organic phase further includes a diluent, and a volume fraction of the extractant in the organic phase is greater than or equal to 5% and less than or equal to 80%.
• the diluent may be used to dissolve the extractant, so that when the extraction is performed on the nickel-containing cobalt solution by using the organic phase, the extractant can be in more full contact with the nickel-containing cobalt solution, to increase the nickel extraction rate.
• the diluent is an organic diluent, and the diluent includes at least one of the following: sulfonated kerosene, No. 260 solvent oil, aviation kerosene, or high-carbon alcohol.
• the extraction includes any one or more of the following: co-current extraction, split-current extraction, counter-current extraction, or cross-current extraction.
• a quantity of stages of the extraction is 1 to 10.
• a pondus hydrogenii pH value of the nickel-containing cobalt solution is greater than or equal to 1 and less than or equal to 5.
• a low pH value of the nickel-containing cobalt solution is likely to affect the extraction rate, resulting in a low extraction rate.
• the pH value of the nickel-containing cobalt solution reaches a specific value, the extraction rate reaches a limit. Therefore, there is no need to set an excessively high pH value.
• a temperature for the extraction is greater than or equal to 10 degrees Celsius °C and less than or equal to 50°C.
• a volume flow ratio of the organic phase to the nickel-containing cobalt solution is greater than or equal to 1:10 and less than or equal to 10:1.
• a low volume flow ratio of the organic phase to the nickel-containing cobalt solution is likely to result in a low extraction rate.
• the volume flow ratio of the organic phase to the nickel-containing cobalt solution reaches a specific value, the extraction rate reaches a limit. Therefore, there is no need to set an excessively high volume flow ratio, to avoid a waste of resources.
• the first cobalt solution is a 4N cobalt solution.
• a nickel removal device for a nickel-containing cobalt solution includes a feed inlet, an extraction box, and a discharge outlet that communicate in sequence, and the device is configured to perform the method according to the third aspect or any possible implementation of the third aspect.
• a cobalt solution includes the extractant according to the first aspect or any possible implementation of the first aspect.
• the cobalt solution is prepared by using the method according to the third aspect or any possible implementation of the third aspect.
• the cobalt solution is prepared by the nickel removal device according to the fourth aspect.
• a concentration of the extractant in the cobalt solution is greater than or equal to 0.001 grams per liter g/L and less than or equal to 1 g/L.
• a concentration of nickel in the cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 0.25 g/L.
• the cobalt solution with a low nickel concentration can be obtained, so that cobalt and nickel can be deeply separated.
• a concentration ratio of cobalt to the nickel in the cobalt solution is greater than or equal to 1000 and less than or equal to 30000.
• the cobalt solution with a high concentration ratio of the cobalt to the nickel can be obtained, so that the cobalt and the nickel can be deeply separated.
• a cobalt element is provided.
• the cobalt element is prepared by using the cobalt solution according to the fifth aspect or any possible implementation of the fifth aspect.
• an electronic component includes the cobalt element according to the sixth aspect.
• an electronic device includes the electronic component according to the seventh aspect.
• a mentioned value range may include two endpoint values of the range.
• a value ranging from 8 to 10 may mean that the value is greater than or equal to 8 and less than or equal to 10.
• the technical solutions in embodiments of this application may be applied to various nickel-containing cobalt solutions, for example, a nickel-containing cobalt sulfate solution, a nickel-containing cobalt acetate solution, a nickel-containing cobalt nitrate solution, and a nickel-containing cobalt chloride solution. This is not limited in embodiments of this application.
• FIG. 1 is a schematic flowchart of a nickel removal method for a nickel-containing cobalt solution according to an embodiment of this application.
• FIG. 1 includes the following steps.
• the organic phase includes an extractant, and the extractant includes at least one of naphthalenesulfonic acid or dialkyl (pyridylmethyl)amine.
• a specific implementation of obtaining the organic phase is not limited in embodiments of this application.
• an extractant may be obtained directly based on a naphthalenesulfonic acid-type chemical or dialkyl (pyridylmethyl)amine.
• a naphthalenesulfonic acid-type chemical and dialkyl (pyridylmethyl)amine may be mixed, to obtain an extractant including naphthalenesulfonic acid and the dialkyl (pyridylmethyl)amine.
• the naphthalenesulfonic acid-type chemical is a chemical including naphthalenesulfonic acid, for example, sodium naphthalenesulfonate, aluminum naphthalenesulfonate, or magnesium naphthalenesulfonate. This is not specifically limited in embodiments of this application.
• a possible chemical formula for the naphthalenesulfonic acid is C 10 H 5 R 1 R 2 SO 3 ⁇ n M n + .
• n in the lower right corner indicates a quantity of naphthalenesulfonic acid structures, and n is a positive integer greater than or equal to 1.
• M is any metal salt or a hydrogen ion, and the metal salt may be, for example, a sodium ion, an aluminum ion, or a magnesium ion. Because one naphthalenesulfonic acid structure has one negative charge and n naphthalenesulfonic acid structures have n negative charges, M should have n positive charges. M n+ indicates that M has n positive charges.
• R 1 is alkyl
• R 2 is alkyl.
• R 1 and R 2 may be same or different alkyl.
• M is preferably the hydrogen ion, to avoid a low purity of cobalt in a nickel-removed cobalt solution caused by introduction of new metal ions into the nickel-containing cobalt solution.
• a chemical formula for R 1 is CH 3 (CH 2 ) m , m in R 1 indicates that one R 1 structure includes m CH 2 structures, and m is a positive integer greater than or equal to 1.
• a value of m ranges from 8 to 10, that is, the value of m is greater than or equal to 8 and less than or equal to 10.
• a chemical formula for R 2 is CH 3 (CH 2 ) p , p in R 2 indicates that one R 2 structure includes p CH 2 structures, and p is a positive integer greater than or equal to 1.
• a value of p ranges from 8 to 10, that is, the value of p is greater than or equal to 8 and less than or equal to 10.
• a concentration of the naphthalenesulfonic acid in the extractant is greater than or equal to 15% and less than or equal to 100%.
• a possible chemical formula for the dialkyl (pyridylmethyl)amine is C 13 H 11 R 1 R 2 N 3 .
• N 3 indicates three nitrogen atoms.
• R 1 and R 2 are similar to R 1 and R 2 in the naphthalenesulfonic acid, and details are not described herein again.
• a concentration of the dialkyl (pyridylmethyl)amine in the extractant is greater than or equal to 50% and less than or equal to 100%.
• the concentration of the naphthalenesulfonic acid in the extractant may range from 15% to 50%, and the concentration of the dialkyl (pyridylmethyl)amine in the extractant may range from 50% to 85%.
• the extractant includes the naphthalenesulfonic acid and the dialkyl (pyridylmethyl)amine, if the concentration of the dialkyl (pyridylmethyl)amine is high, an extraction rate of nickel extracted by the extractant is high.
• the extractant is used to remove nickel from the nickel-containing cobalt solution.
• the organic phase further includes a diluent, and the diluent is used to dissolve the extractant.
• the diluent may be an organic diluent.
• the diluent may be at least one of the following: sulfonated kerosene, No. 260 solvent oil, aviation kerosene, or high-carbon alcohol.
• the high-carbon alcohol may be any one or more of high-carbon alcohol of C 8 to C 13 .
• the organic phase may include the extractant and the diluent.
• a volume fraction of the extractant in the organic phase is greater than or equal to 5% and less than or equal to 80%, that is, a volume of the extractant accounts for 5% to 80% of a volume of the organic phase. This is not limited in embodiments of this application.
• S120 Perform extraction on the nickel-containing cobalt solution by using the organic phase, to obtain a nickel-removed cobalt solution.
• the organic phase may be used to perform the extraction on the nickel-containing cobalt solution, so that nickel in the nickel-containing cobalt solution enters the organic phase, to obtain the nickel-removed cobalt solution.
• a purity of cobalt in the nickel-removed cobalt solution is high.
• a nickel-containing organic phase when the extraction is performed on the nickel-containing cobalt solution by using the organic phase, a nickel-containing organic phase may be further obtained.
• the nickel in the nickel-containing cobalt solution is removed into the organic phase, and in this case, the organic phase becomes the nickel-containing organic phase, and the nickel-containing cobalt solution becomes the nickel-removed cobalt solution.
• the nickel-containing cobalt solution is an acid solution, and a pondus hydrogenii (pondus hydrogenii, pH) value is greater than or equal to 1 and less than or equal to 5. If the pH value of the nickel-containing cobalt solution is low, a nickel extraction rate is low. When the pH value of the nickel-containing cobalt solution reaches a specific degree, the nickel extraction rate reaches a limit. Therefore, there is no need to set an excessively high pH value.
• the pH value of the nickel-containing solution may be adjusted by adding an acid substance or an alkaline substance to the nickel-containing cobalt solution.
• a specific acid substance or alkaline substance is not limited in embodiments of this application.
• the acid substance is a substance whose pH value is less than 7, and the alkaline substance is a substance whose pH value is greater than 7.
• the extraction includes single-stage extraction or multi-stage extraction.
• the extraction includes any one or more of the following: co-current extraction, split-current extraction, counter-current extraction, or cross-current extraction, or the like. This is not limited in embodiments of this application.
• the organic phase may be used to perform any one or more of the following extraction on the nickel-containing cobalt solution: single-stage or multi-stage co-current extraction, single-stage or multi-stage split-current extraction, single-stage or multi-stage counter-current extraction, or single-stage or multi-stage cross-current extraction.
• a quantity of stages of the extraction may be 1 to 10, and a temperature for the extraction is greater than or equal to 10°C and less than or equal to 50°C. This is not limited in embodiments of this application.
• a volume flow ratio of the organic phase to the nickel-containing cobalt solution is greater than or equal to 1:10 and less than or equal to 10:1.
• a ratio of a fluid volume of the organic phase to the nickel-containing cobalt solution passing through a same flow cross-section in a unit time is between 1:10 and 10:1.
• a concentration ratio of the cobalt to nickel in the nickel-removed cobalt solution is greater than or equal to 1000 and less than or equal to 30000.
• a concentration of the extractant in the nickel-removed cobalt solution is greater than or equal to 0.001 grams per liter (gram/liter, g/L) and less than or equal to 1 g/L.
• a concentration of the nickel in the nickel-removed cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 0.25 g/L.
• the organic phase before the extraction is performed on the nickel-containing cobalt solution by using the organic phase, the organic phase may be first saponified with a first cobalt solution, to obtain a cobalt-containing saponified organic phase. Then, the extraction is performed on the nickel-containing cobalt solution by using the cobalt-containing saponified organic phase, to obtain the nickel-removed cobalt solution.
• the organic phase may be first saponified with a first cobalt solution, to obtain a cobalt-containing saponified organic phase. Then, the extraction is performed on the nickel-containing cobalt solution by using the cobalt-containing saponified organic phase, to obtain the nickel-removed cobalt solution.
• an extractant including any one or more of naphthalenesulfonic acid or dialkyl (pyridylmethyl)amine may be used to selectively extract nickel from a nickel-containing cobalt solution, to obtain a high-purity cobalt solution and deeply separate nickel and cobalt in the nickel-containing cobalt solution.
• the nickel removal method in this embodiment of this application has a short procedure, a high nickel extraction rate, low chemical reagent consumption, and low costs, and facilitates industrialization.
• FIG. 2 is a schematic flowchart of a nickel removal method for a nickel-containing cobalt solution according to an embodiment of this application.
• FIG. 2 includes the following steps.
• the extractant includes any one or more of naphthalenesulfonic acid or dialkyl (pyridylmethyl)amine, and the diluent may be an organic diluent. Mixing the extractant and the diluent can obtain the organic phase.
• a specific manner, a temperature, or the like for mixing the extractant and the diluent is not limited in embodiments of this application.
• the extractant and the diluent are similar to the extractant and the diluent in S110, and details are not described herein again.
• a volume fraction ratio of the extractant to the diluent in the organic phase is greater than or equal to 5:95 and less than or equal to 80:20.
• step S210 may be performed, or may not be performed.
• an organic phase including an extractant and a diluent may be directly obtained.
• S220 Saponify the organic phase with a first cobalt solution, to obtain a cobalt-containing saponified organic phase.
• cobalt-involved saponification may be performed on the organic phase, to improve a capability of the extractant in the organic phase to form a complex with nickel.
• the first cobalt solution includes cobalt.
• a purity of the cobalt in the first cobalt solution may be at least 99.9%.
• the first cobalt solution may be a 3N cobalt solution or a 4N cobalt solution.
• the 3N cobalt solution indicates that the purity of the cobalt in the cobalt solution is 99.9%
• the 4N cobalt solution indicates that the purity of the cobalt in the cobalt solution is 99.99%.
• mixing the organic phase and the first cobalt solution can implement the cobalt-involved saponification, to obtain the cobalt-containing saponified organic phase.
• a specific manner or a temperature for mixing the organic phase and the first cobalt solution, a mixture ratio, or the like is not limited in embodiments of this application.
• S230 Perform extraction on the nickel-containing cobalt solution by using the cobalt-containing saponified organic phase, to obtain a nickel-removed cobalt solution.
• the cobalt-containing saponified organic phase may be used to perform the extraction on the nickel-containing cobalt solution, so that nickel in the nickel-containing cobalt solution enters the cobalt-containing saponified organic phase, to obtain the nickel-removed cobalt solution.
• a nickel-containing organic phase when the extraction is performed on the nickel-containing cobalt solution by using the cobalt-containing saponified organic phase, a nickel-containing organic phase may be further obtained.
• the nickel in the nickel-containing cobalt solution is removed into the cobalt-containing saponified organic phase, and in this case, the cobalt-containing saponified organic phase becomes the nickel-containing organic phase, and the nickel-containing cobalt solution becomes the nickel-removed cobalt solution.
• the nickel-containing cobalt solution is similar to the nickel-containing cobalt solution in S120, and details are not described herein again.
• the cobalt-containing saponified organic phase may be used to perform any one or more of the following extraction on the nickel-containing cobalt solution: single-stage or multi-stage co-current extraction, single-stage or multi-stage split-current extraction, single-stage or multi-stage counter-current extraction, or single-stage or multi-stage cross-current extraction.
• a quantity of stages of the extraction may be 1 to 10, and a temperature for the extraction is greater than or equal to 10°C and less than or equal to 50°C. This is not limited in embodiments of this application.
• a volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution is greater than or equal to 1:10 and less than or equal to 10:1.
• a concentration ratio of cobalt to nickel in the nickel-removed cobalt solution is greater than or equal to 1000 and less than or equal to 30000.
• a concentration of the extractant in the nickel-removed cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 1 g/L.
• a concentration of the nickel in the nickel-removed cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 0.25 g/L.
• the cobalt-containing saponified organic phase includes 50% extractant and 50% sulfonated kerosene (namely, the diluent), and in the nickel-containing cobalt solution, a concentration of cobalt is 31.89 g/L, and a concentration of nickel is 0.52 g/L.
• a concentration ratio of the cobalt to the nickel in the nickel-containing cobalt solution is approximately 31.89/0.52 ⁇ 61.33.
• Table 1 Data about single-stage extraction at different volume flow ratios O/A Raffinate Nickel extraction rate (%) Cobalt (g/L) Nickel (g/L) Cobalt/Nickel pH 1:1 32.72 0.2 163.60 1.93 61.54 2:1 34.35 0.12 286.25 2.08 76.92 4:1 39.17 0.09 435.22 2.11 82.69 6:1 39.03 0.05 780.60 2.13 90.38 8:1 40.29 0.04 1007.25 2.35 92.31
• O/A indicates the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution
• the raffinate is the nickel-removed cobalt solution.
• the nickel extraction rate is calculated as follows: (Concentration of the nickel in the nickel-containing cobalt solution-Concentration of the nickel in the raffinate)/Concentration of the nickel in the nickel-containing cobalt solution.
• a concentration of the cobalt is 40.29 g/L
• a concentration of the nickel is 0.04 g/L
• a concentration ratio of the cobalt to the nickel is approximately 1007.25
• the nickel extraction rate is approximately 92.31%.
• the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution has great impact on the nickel extraction rate, and a higher volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution indicates a higher nickel extraction rate.
• the concentration of the nickel in the nickel-containing cobalt solution can be reduced from 520 milligrams per liter (milligram/liter, mg/L) to 200 mg/L, or even to 40 mg/L.
• the concentration ratio of the cobalt to the nickel in the nickel-containing cobalt solution can be increased from 61.33 to 1007.25.
• the cobalt-containing saponified organic phase includes 50% extractant and 50% sulfonated kerosene
• a concentration of cobalt is 31.89 g/L
• a concentration of nickel is 0.52 g/L.
• the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution is 4:1
• simulated five-stage counter-current extraction is performed, mixture time for the extraction is set to 10 min, and a temperature is set to 25°C.
• related data that can be obtained is shown in Table 2.
• Table 2 Data about simulated five-stage counter-current extraction Number of rows Raffinate Nickel extraction rate (%) Cobalt (g/L) Nickel (g/L) Cobalt/Nickel pH 10 34.2 0.0019 18000 1.23 99.63 11 34.5 0.0018 19167 2.39 99.65 12 34.3 0.0014 24500 2.40 99.73 13 35.4 0.0019 18632 2.37 99.63
• a concentration of the cobalt is 34.2 g/L
• a concentration of the nickel is 0.0019 g/L
• a concentration ratio of the cobalt to the nickel is approximately 18000
• the nickel extraction rate is approximately 99.63%.
• a concentration of the cobalt is 35.4 g/L
• a concentration of the nickel is 0.0019 g/L
• a concentration ratio of the cobalt to the nickel is approximately 18632
• the nickel extraction rate is approximately 99.63%.
• the cobalt-containing saponified organic phase includes 50% extractant and 50% sulfonated kerosene
• a concentration of cobalt is 31.89 g/L
• a concentration of nickel is 0.52 g/L.
• the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution is 2:1, five-stage cross-current extraction is performed, mixture time for the extraction is set to 10 min, and a temperature is set to 30°C.
• related data that can be obtained is shown in Table 3.
• a concentration of the cobalt is 33.94 g/L
• a concentration of the nickel is 0.2036 g/L
• a concentration ratio of the cobalt to the nickel is approximately 167
• the nickel extraction rate is approximately 60.85%.
• a concentration of the cobalt is 35.81 g/L
• a concentration of the nickel is 0.0029 g/L
• a concentration ratio of the cobalt to the nickel is approximately 12348; and the nickel extraction rate is approximately 99.44%.
• the quantity of extractions has great impact on the nickel extraction rate, and a larger quantity of extractions indicates a higher nickel extraction rate.
• the concentration of the nickel can be reduced from 520 mg/L to less than 3 mg/L, and the concentration ratio of the cobalt to the nickel is increased from 61.33 to more than 12000; and the nickel extraction rate can reach more than 99.4%.
• the method in this embodiment of this application can deeply remove the impurity nickel from the nickel-containing cobalt solution.
• the cobalt-containing saponified organic phase includes 70% extractant and 30% sulfonated kerosene
• a concentration of cobalt is 31.89 g/L
• a concentration of nickel is 0.52 g/L.
• the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution is 2:1, five-stage cross-current extraction is performed, mixture time for the extraction is set to 10 min, and a temperature is set to 30°C.
• related data that can be obtained is shown in Table 4.
• the cobalt-containing saponified organic phase in Table 4 includes 70% extractant while the cobalt-containing saponified organic phase in Table 3 includes only 50% extractant, the data in Table 4 is different from that in Table 3 when other extraction conditions are the same.
• a concentration of the cobalt is 36.36 g/L
• a concentration of the nickel is 0.0014 g/L
• a concentration ratio of the cobalt to the nickel is approximately 25971; and the nickel extraction rate is approximately 99.73%.
• the concentration of the nickel can be reduced from 520 mg/L to 1.4 mg/L, and the concentration ratio of the cobalt to the nickel is increased from 61.33 to more than 25000; and the nickel extraction rate can reach more than 99.7%.
• the method in this embodiment of this application can deeply remove the impurity nickel from the nickel-containing cobalt solution.
• the cobalt-containing saponified organic phase includes 50% extractant and 50% sulfonated kerosene
• a concentration of cobalt is 34.33 g/L
• a concentration of nickel is 0.6061 g/L.
• a concentration ratio of the cobalt to the nickel is approximately 56.64.
• a concentration of the cobalt is 38.8 g/L
• a concentration of the nickel is 0.0015 g/L
• a concentration ratio of the cobalt to the nickel is approximately 25867
• the nickel extraction rate is approximately 99.71%.
• the concentration of the cobalt is 34.33 g/L and the concentration of the nickel is 0.6061 g/L in the nickel-containing cobalt solution, and the volume flow ratio of the cobalt-containing saponified organic phase to the nickel-containing cobalt solution is 5:1, after the five-stage cross-current extraction, in the raffinate, the concentration of the nickel is reduced from 606.1 mg/L to 1.5 mg/L, and the concentration ratio of the cobalt to the nickel is increased from 56.64 to more than 25000; and the nickel extraction rate can reach more than 99.7%.
• the method in this embodiment of this application can deeply remove the impurity nickel from the nickel-containing cobalt solution.
• the nickel extraction rate can reach more than 99.7%, and the concentration ratio of the cobalt to the nickel in the obtained raffinate can reach more than 25000.
• the nickel removal method in this embodiment of this application can deeply separate the cobalt and the nickel.
• FIG. 3 is a diagram of a structure of a nickel removal device for a nickel-containing cobalt solution according to an embodiment of this application.
• the nickel removal device 300 in FIG. 3 includes a feed inlet 301, an extraction box 310, and a discharge outlet 302 that communicate in sequence.
• the nickel removal device 300 may perform the method shown in FIG. 2 or FIG. 3 .
• the feed inlet 301 may be configured to input an organic phase and/or a nickel-containing cobalt solution.
• the feed inlet 301 may be configured to input at least one of an organic phase, a first cobalt solution, or a nickel-containing cobalt solution.
• the feed inlet 301 may be configured to input a cobalt-containing saponified organic phase or a nickel-containing cobalt solution.
• the extraction box 310 may be configured to perform extraction on a nickel-containing cobalt solution by using an organic phase.
• the extraction box 310 may be configured to: saponify an organic phase with a first cobalt solution, to obtain a cobalt-containing saponified organic phase; and perform extraction on a nickel-containing cobalt solution by using the cobalt-containing saponified organic phase.
• the extraction box 310 may be configured to perform extraction on a nickel-containing cobalt solution by using a cobalt-containing saponified organic phase.
• the discharge outlet 302 may be configured to output a nickel-removed cobalt solution.
• the discharge outlet 302 may be configured to output a nickel-containing organic phase and a nickel-removed cobalt solution.
• An embodiment of this application may further provide a cobalt solution.
• the cobalt solution includes the extractant described in S110.
• the cobalt solution is prepared by using the method shown in FIG. 2 or FIG. 3 .
• the cobalt solution is prepared by the foregoing nickel removal device.
• a concentration of the extractant in the cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 1 g/L.
• a concentration of nickel in the cobalt solution is greater than or equal to 0.001 g/L and less than or equal to 0.25 g/L.
• a concentration ratio of cobalt to the nickel in the cobalt solution is greater than or equal to 1000 and less than or equal to 30000.
• An embodiment of this application may further provide a cobalt element.
• the cobalt element is prepared by using the foregoing cobalt solution.
• An embodiment of this application may further provide an electronic component.
• the electronic component includes the foregoing cobalt element.
• An embodiment of this application may further provide an electronic device.
• the electronic device includes the foregoing electronic component.

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• 2022
  • 2022-12-31 CN CN202211735276.5A patent/CN118272651A/zh active Pending
• 2023
  • 2023-12-29 WO PCT/CN2023/143431 patent/WO2024141058A1/fr not_active Ceased
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