Process for refining gold and apparatus employed therefor

Details Process for refining gold and apparatus employed therefor Process for refining gold and apparatus employed therefor

1987-07-15

1989-08-22

Doll, John

Chemistry: electrical and wave energy

Processes and products

75108, 75118R, 204111, 204234, 204235, 423 34, 423 38, 423 39, 423 43, C25B 124, C25C 120, C25C 700

Patent

active

048592935

ABSTRACT:
Disclosed are processes and an apparatus for refining gold. One of the processes comprises dissolving unrefined gold by use of iodine and/or an iodide compound to form a solution containing an iodide compound of gold, removing insoluble substances in the solution, reducing the ions containing the gold by use of an alkali to precipitate the gold of high purity. In this process, the iodine may be obtained by electrolyzing the iodide compound. The other process and the apparatus further comprise circulating the solution having been separated from the precipitated gold for reuse, and the alkali simultaneously produced by the above electrolysis is economically employed therein.

REFERENCES:
patent: 631040 (1899-08-01), Greenawalt
patent: 1998010 (1935-04-01), Girvin
patent: 4375984 (1983-03-01), Bahl et al.
patent: 4612093 (1986-09-01), Shor
Perry's Chemical Engineers' Handbook, 6th ed., Perry et al., eds., McGraw-Hill Book Co., 1984, pp. 17-27 to 28.

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