Classifications

• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G9/00—Compounds of zinc
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
  • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury

Definitions

• the present invention relates to a method of purifyingelectrolytes. More particularly, 'it relates to a method of purifying zinc electrolytes and especially to electrolytes as used in the electrolytic method of winning zinc from ores or other materials.
• the impurities cadmium, copper, tin, arsenic, antimony, lead, and other elements if left in the electrolyte, will deposit along with the zinc in the electrolytic cell and will render the zinc impure so that its value is decreased; other impurities, among which may be mentioned arsenic, antimony, tin, germanium, tellurium, se lenium, iron, nickel, and cobalt, lower-the efiiciency of the electrolysis so that more current is used to produce a pound of metalthan would, be required'if'theseelements were abSent and so theirpresence greatly increases the expense of the process. Commonly, two and sometimes three' processes are used to remove these impurities.
• antimony, tin, germanium, tellurium, selenium, and other metals is precipitated by treating the electrolyte with zinc oxide, or roasted zinc ore, or lime, while air is blown through the solution.
• the solution is then treated with 'zinc as copper salts, and antimony, arsenic, tellurium, selenium, tin, cobalt, copper, cadmium, and other elements-are precipitated and may be removed by filtration.
• a third method is used to remove certain elements, as, for example, sometimes a nitroso-B-naphthol 4s used to remove cobalt.
• tin may be used in: stead of antimony or arsenic, and that tin has certain advantages which make it to be preferred to either arsenic or antimony. In the first place,
• a method of purifying zinc electrolytes by means of metallic precipitants comprising passing the electrolyte through a stationary'porous mass of finely divided precipitant for the electrolyte comprising zinc dust coated with copper and tin, and maintaining the precipitated impurities in contact with the precipitants while continuing to pass the electrolyte through said mass.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Inorganic Chemistry (AREA)
• Electrolytic Production Of Metals (AREA)
• Manufacture And Refinement Of Metals (AREA)
• Catalysts (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=60183151

Family Applications (1)

Country Status (5)

Cited By (7)

Families Citing this family (3)

• 1943
  • 1943-08-09 US US497980A patent/US2396569A/en not_active Expired - Lifetime
  • 1943-09-13 GB GB15022/43A patent/GB575001A/en not_active Expired
• 1947
  • 1947-11-06 FR FR955125D patent/FR955125A/fr not_active Expired
  • 1947-11-12 BE BE477290A patent/BE477290A/fr unknown
• 1948
  • 1948-10-23 DE DEP19354A patent/DE811621C/de not_active Expired

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