Recovery of precious metals

Details Recovery of precious metals Recovery of precious metals

2007-01-23

2007-01-23

King, Roy (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

Reexamination Certificate

active

10754877

ABSTRACT:
This invention relates to the recovery of precious metals and, more particularly, to the recovery of precious metals, such as platinum group metals, gold and rhenium, from various sources using a solution comprising at least one ammonium salt, at least one halogen salt and at least one oxidant.

REFERENCES:
patent: 5308381 (1994-05-01), Han et al.
patent: 5328669 (1994-07-01), Han et al.
patent: 5542957 (1996-08-01), Han et al.
patent: 6471743 (2002-10-01), Young et al.
patent: 2003/0129112 (2003-07-01), Vinals Olia et al.

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