Cobalt/nickel separation by cyanide complexation

被引：0

作者：

Shuey, SA ^{[1
]}

Twidwell, LG ^{[1
]}

机构：

[1] MineDepot Com, Chicago, IL USA

来源：

CYANIDE: SOCIAL, INDUSTRIAL AND ECONOMIC ASPECTS | 2001年

关键词：

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present industrial practice used to separate aqueous cobalt from nickel is multistage solvent extraction processing. This paper describes a different but simpler treatment technology. The proposed technology has been applied to cobalt/nickel hydroxide intermediate solids produced from the treatment of Electrochemical Machining (ECM) waste sludge. The process consists of dissolving the cobalt/nickel hydroxides in basic cyanide solutions. Cobalt and nickel form aqueous solution metal cyanide complexes. Nickel can be selectively precipitated from the solution as a nickellic hydroxide solid. Cobalt can be recovered from the leach solution by precipitation of a cobaltous/cobaltic cyanide double salt. The double salt product can then be subsequently treated to produce an appropriate cobalt product. The process chemistry, proposed flowsheet, and preliminary reagent costs are presented and discussed.

引用

页码：413 / 424

页数：12