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
  • C22B15/00—Obtaining copper
  • C22B15/0063—Hydrometallurgy
• • 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
  • C22B15/00—Obtaining copper
  • C22B15/0063—Hydrometallurgy
  • C22B15/0084—Treating 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
  • C22B3/30—Oximes
• • 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
  • C22B3/402—Mixtures of acyclic or carbocyclic compounds of different types
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/20—Recycling

Definitions

• TXIB 2,2,4-trimethyl-1 ,3- pentanedioldiisobutyrate
• TXIB belongs to a class of compounds called equilibrium modifiers which are disclosed in U. S. patents 4,507,268 and 6,231 ,784, the entire contents of each of which is incorporated herein by reference.
• Modifiers alter the normal copper extraction ability of an extractant thereby allowing one to carefully select a blend of 5-nonylsalicylaldoxime and modifier that is optimum or near optimum for a particular copper solvent extraction application.
• both of these compounds must be monitored using sophisticated analytical equipment and then the plant operators must calculate the amount of pure 5-nonylsalicylaldoxime which must be added on a regular basis along with the normal copper solvent reagent in order to maintain the proper blend of 5-nonylsalicylaldoxime to modifier in the plant organic.
• the present invention pertains to a method for extracting copper from an aqueous copper solution wherein the aqueous copper solution has a temperature of at least 30°C.
• the method comprises contacting the aqueous copper solution with an extraction reagent of the formula (I)
• R is a linear or branched C 1 0-18 alkyl group and R-i is H or CH 3 .
• Compounds of formula (I) wherein Ri is H may be prepared according to methods described in U.S. Pat. Nos. 4,020,105 or 4,020,106 or by oximation of aldehydes prepared according to U.S. Pat. No. 4,085,146, the entire contents of each of which is incorporated herein by reference.
• Compounds of formula (I) wherein Ri is CH 3 can be prepared according to the procedures disclosed in UK Patent 1 ,322,532.
• Preferred extractants include 2-hydroxy-5-decylacetophenone oxime, 2-hydroxy-5-dodecylacetophenone oxime, 2-hydroxy-5-pentadecylacetophenone oxime, 5-decylsalicylaldoxime, 5-dodecylsalicylaldoxime, and 5-pentadecylsalicylaldoxime and mixtures thereof.
• the extractants according to the invention can be and typically are dissolved in a commercial hydrocarbon solvent such as CONOSOL® 170ES, ORFOM® SX 7, ORFOM® SX 12, ORFOM® SX 11 , Shellsol 2046 and similar solvents at a concentration greater than about 0.25 M.
• the organic extractant may also contain an equilibrium modifier which can include an ester such as 2,2,4-trimethylpentane-1 ,3-diol diisobutyrate, di-n- butyl adipate, a ketone, an ether, or an alcohol such as tridecyl alcohol.
• the organic extractant may contain additional oxime extractants.
• the aqueous feed solution temperature range may be greater than or equal to 30°C,
• the concentration of copper in the aqueous feed solution will typically vary from about 5 gpl Cu to about 50 gpl Cu, most preferably it will be greater than 10 gpl Cu.
• the leach liquor may result from pressure oxidation of a concentrate or a bio-oxidation process carried out on a concentrate.
• a series of stability tests were carried out by continuously stirring an aqueous phase containing 30 gpl (grams per liter) Cu and 180 gpl sulfuric acid with an organic extractant phase at 45°C. Approximately 350 ml of the aqueous phase and 350 ml of the organic phase were placed in a standard
• Teflon® paddle stirrer and a Friedrigs condenser The flask was placed in a thermostated oil bath to control the temperature at 45°C. The agitator was set at 480 rpm. Samples of the organic were removed periodically and analyzed for copper max load and for oxime content.
• 5-nonylsalicylaldoxime has a half life of approximately 115 days, significantly less than 5-dodecylsalicylaldoxime, which has a half life of 220 days under these test conditions.
• the organic phase was 0.2640 M in 2-hydroxy-5- nonylacetophenone oxime (Ketoxime), 0.3091 M in 5-nonylsalicylaldoxime (C9 Aldox), and 0.0202 M 5-dodecylsalicylaldoxime (C12 Aldox) in CONOSOL® 170ES.
• the results are summarized in Table 2.
• the half life of 5-nonylsalicylaldoxime was approximately 83 days while the half life of the 5-dodecylsalicylaldoxime was 170 days, significantly greater than that of the 5-nonylsalicylaldoxime.
• the 2- hydroxy-5-nonylacetophenone oxime was significantly more stable than the two aldoximes. It is estimated to have a half life greater than 330 days under these test conditions.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Geology (AREA)
• Extraction Or Liquid Replacement (AREA)
• Manufacture And Refinement Of Metals (AREA)

Priority Applications (4)

Applications Claiming Priority (4)

Publications (2)

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• 2004
  • 2004-04-22 US US10/829,597 patent/US20040258590A1/en not_active Abandoned
  • 2004-04-27 MX MXPA05011693A patent/MXPA05011693A/es unknown
  • 2004-04-27 BR BRPI0410211-8A patent/BRPI0410211A/pt not_active Application Discontinuation
  • 2004-04-27 CA CA002525834A patent/CA2525834A1/en not_active Abandoned
  • 2004-04-27 PE PE2004000416A patent/PE20050218A1/es not_active Application Discontinuation
  • 2004-04-27 AU AU2004242077A patent/AU2004242077A1/en not_active Abandoned
  • 2004-04-27 WO PCT/US2004/012907 patent/WO2004104238A2/en not_active Ceased

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