Precious metal recovery process from carbonaceous ores

Details Precious metal recovery process from carbonaceous ores Precious metal recovery process from carbonaceous ores

1992-11-24

1994-10-25

Lilling, Herbert J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

423 23, 423 27, 423 29, 423 30, 75729, 75732, 75735, 75737, 75741, 75744, C22B 1104, C22B 1100

Patent

active

053586999

ABSTRACT:
A process for recovering at least one precious metal from an ore containing carbonaceous material is disclosed. The process involves the use of certain plant derived ortho-quinone containing components, in particular, certain lignin and/or tannin derived components containing ortho-quinone functionality.
Preferred compositions comprise at least one ligno sulfonate component containing ortho-quinone functionality. In the process, the use of at least one additional oxidant capable of maintaining the ortho-quinone containing functionality in the desired oxidation state provides for integrated process synergy.

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