Process for recovering noble metals from their cyanide complexes

Details Process for recovering noble metals from their cyanide complexes Process for recovering noble metals from their cyanide complexes

1985-10-21

1987-06-30

Castel, Benoit

Liquid purification or separation

Processes

Ion exchange or selective sorption

210668, 210684, 210688, 210721, 210904, 210912, 75118R, 75118P, 423 25, C02F 128, C22B 1100

Patent

active

046769099

ABSTRACT:
Noble metals are recovered from their cyanide complexes in aqueous solution by reaction with red phosphorus. To this end, red phosphorus is used in quantities of 1 to 5 weight %, based on the aqueous solution of the noble metal cyanide complex, in combination with an additional strong oxidizing agent.

REFERENCES:
patent: 3617567 (1971-11-01), Mathre
patent: 4176060 (1979-11-01), Sury et al.
patent: 4392962 (1983-07-01), Lehr et al.
patent: 4416786 (1983-11-01), Knorre et al.
patent: 4445935 (1984-05-01), Posey et al.
patent: 4446029 (1984-05-01), Betermier et al.

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