Method and apparatus for purification of gold

Details Method and apparatus for purification of gold Method and apparatus for purification of gold

1985-05-31

1986-09-16

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204263, 204264, 75118R, 106 126, 423 34, 423 38, 423 41, C25C 106

Patent

active

046120939

ABSTRACT:
A novel gold purification method is provided which comprises electrolyzing gold into a novel pregnant electrolyte, segregating the dissolved gold ions from the cathode by a semipermeable barrier, separating insoluble impurities from the gold-containing liquidus, and then selectively reducing the gold to metallic form from the liquidus by a selective chemical reducing agent. The electrolyte is impregnated with a catalyst for leveling the overvoltage of gold and preferably contains a peroxide or a nascent oxygen source. A unitary apparatus for the method is provided.

REFERENCES:
patent: 2017330 (1935-10-01), Traphagen
patent: 4113471 (1978-09-01), Langhorst et al.

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