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Title: Removal of Zn or Cd and cyanide from cyanide electroplating wastes

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.
  1. (Knoxville, TN)
Publication Date:
OSTI Identifier:
Report Number(s):
US 4026790
Resource Type:
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Country of Publication:
United States
removal; zn; cd; cyanide; cyanide; electroplating; wastes; method; described; efficient; stripping; stable; complexes; selected; quaternary; amine; cyanide; zn; cd; alkali; metal; hydroxide; solution; naoh; koh; quantitatively; strip; pregnant; extract; quaternary; ammonium; complex; metal; cyanide; content; regenerate; quaternary; ammonium; hydroxide; salt; extracting; metal; cyanide; values; ammonium hydroxide; quaternary ammonium; quaternary ammonium; alkali metal; metal hydroxide; hydroxide solution; oxide solution; stable complexes /423/210/