Journal Archive
- Volume 25
- Issue 3
- Jul 1981
- Pages 106-112
Back to 1981, Volume 25, Issue 3
Separating the Platinum Group Metals by Liquid–Liquid Extraction
NEW PROCESS HAS POTENTIAL ECONOMIC ADVANTAGES OVER CONVENTIONAL SELECTIVE PRECIPITATION
- P. Charlesworth
- Platinum Metals Rev.,
- 1981,
- 25,
- (3),
- 106
Article Synopsis
To extract the platinum group metals from the ore, and to refine them to the very high purity required for their many applications, requires a multitude of complex operations. At present the final refining stage that produces the individual platinum group metals is carried out by selective precipitation from a solution of mixed platinum group metals, but this is inefficient as far as the degree of separation is concerned. An improved process which makes use of liquid–liquid extraction has been developed to a pilot plant stage, and this paper highlights some of the the chemical and process principles that underlie this method of separation.
