Removal of Zn or Cd and cyanide from cyanide electroplating wast

Details Removal of Zn or Cd and cyanide from cyanide electroplating wast Removal of Zn or Cd and cyanide from cyanide electroplating wast

1975-03-07

1977-05-31

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

423100, B01D 1100

Patent

active

040267903

ABSTRACT:
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.

REFERENCES:
patent: 3258307 (1966-06-01), George
patent: 3259568 (1966-07-01), Jordan et al.

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