Precious metal refining with fluorine gas

Details Precious metal refining with fluorine gas Precious metal refining with fluorine gas

1990-06-12

1991-12-31

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75633, 423 22, 423489, C22B 1100

Patent

active

050768395

ABSTRACT:
Feed mixtures containing one or more platinum group metals are fluorinated to form at least one volatile fluoride product which is separated from the residual solid. Separations of different fluorides may be effected by collecting different fractions of volatile fluorides. Palladium does not form a volatile fluoride and is retained in the residual solid.

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patent: 4077800 (1978-03-01), Peka et al.
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