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

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.

Inventors:
 [1]
  1. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
862841
Patent Number(s):
4026790
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
removal; zn; cd; cyanide; electroplating; wastes; method; described; efficient; stripping; stable; complexes; selected; quaternary; amine; alkali; metal; hydroxide; solution; naoh; koh; quantitatively; strip; pregnant; extract; ammonium; complex; content; regenerate; salt; extracting; values; ammonium hydroxide; quaternary ammonium; alkali metal; metal hydroxide; hydroxide solution; oxide solution; stable complexes; /423/210/

Citation Formats

Moore, Fletcher L. Removal of Zn or Cd and cyanide from cyanide electroplating wastes. United States: N. p., 1977. Web.
Moore, Fletcher L. Removal of Zn or Cd and cyanide from cyanide electroplating wastes. United States.
Moore, Fletcher L. Tue . "Removal of Zn or Cd and cyanide from cyanide electroplating wastes". United States. https://www.osti.gov/servlets/purl/862841.
@article{osti_862841,
title = {Removal of Zn or Cd and cyanide from cyanide electroplating wastes},
author = {Moore, Fletcher L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {5}
}

Patent:

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