发明名称 |
Removal of Zn or Cd and cyanide from cyanide electroplating wastes |
摘要 |
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.
|
申请公布号 |
US4026790(A) |
申请公布日期 |
1977.05.31 |
申请号 |
US19750556353 |
申请日期 |
1975.03.07 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION |
发明人 |
MOORE, FLETCHER L. |
分类号 |
B01D11/04;C02F1/26;C02F1/68;C22B3/28;(IPC1-7):B01D11/00 |
主分类号 |
B01D11/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|