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:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (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 C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- 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 = {Tue May 31 00:00:00 EDT 1977},
month = {Tue May 31 00:00:00 EDT 1977}
}
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