Extraction of metals

Details Extraction of metals Extraction of metals

1986-07-03

1988-02-23

Stoll, Robert L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75117, 75118R, 75119, 75121, 423 22, 423 24, 423 87, 423139, 423508, 210684, 210685, 210688, C22B 1104

Patent

active

047268417

ABSTRACT:
A solvent extraction process for the separation of one or more precious metal species from other precious metal species and possibly also base metal species contained in an aqueous acidic solution of the type produced during the recovery of precious metals from ore or scrap in which the solvent contains an extractant which is a mono-N-substituted amide. Also a mono-N-substituted amide extractant. The extractant permits better separation factors generally and also enables platinum to be extracted before palladium and permits improved extraction of iridium from rhodium.

REFERENCES:
patent: 3033675 (1962-05-01), Hedley
patent: 3565608 (1971-02-01), Anspon
patent: 3817745 (1974-06-01), Copes et al.

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