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Removal of Zn or Cd and cyanide from cyanide electroplating wastes

Patent ·
OSTI ID:7187987
A method is described for the efficient stripping of stable complexes of a selected quaternary amine and a cyanide of Zn or Cd. An alkali metal hydroxide solution such as NaOH or KOH will quantitatively strip a pregnant extract of the quaternary ammonium complex of its metal and cyanide content and regenerate a quaternary ammonium hydroxide salt which can be used for extracting further metal cyanide values.
Assignee:
U.S. Energy Research and Development Administration
Patent Number(s):
None
OSTI ID:
7187987
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALKALI METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
CADMIUM
CADMIUM COMPLEXES
COMPLEXES
CYANIDES
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELECTROPLATING
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
HYDROXIDES
LIQUID WASTES
LYSIS
METALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PLATING
QUATERNARY COMPOUNDS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SURFACE COATING
WASTES
ZINC
ZINC COMPLEXES