Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1992-11-12
1993-10-26
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75718, 75720, 423 22, 423 24, 423139, C22B 324
Patent
active
052561879
ABSTRACT:
The present invention relates to the extraction and separation of low concentrations of precious group metals from acid chloride solutions, which are obtained by leaching catalytic converters, by utilizing a 8-hydroxyquinoline containing resin and a thiourea stripping process. The said process eliminates the phase separation problems and reagent losses which are normally associated with prior art methods. In addition to being used as a catalytic converter recycler, the present invention can be also employed by waste water treatment plants.
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Andrews Melvyn J.
Sherex Chemical Company Inc.
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