Process for recovering gold

Details Process for recovering gold Process for recovering gold

1977-02-22

1978-09-12

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75108, 75118R, C22B 1104

Patent

active

041134672

ABSTRACT:
A method is disclosed for recovering gold from solution by means of adsorbing the solution onto a silica-containing catalyst to form a gel, reducing the gold with oxalic acid, removing the precipitated gold by washing, and recycling the catalyst and any unused reducing agent immediately to the adsorption step. The size of the gold particle produced is directly proportional to the grade of the catalyst used; recovery is greater than 99% effective.

REFERENCES:
patent: 1833276 (1931-11-01), Busch
patent: 2254976 (1941-09-01), Powell
patent: 3271135 (1966-09-01), Davidoff
patent: 3717453 (1973-02-01), Daiga
patent: 3885955 (1975-05-01), Lutz et al.

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