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Selective removal of mercury from cyanide solutions.

Authors
Flynn-CM Jr.; Carnahan-TG; Lindstrom-RE
Source
U S Pat 4 256 707 1981 Mar; :
Link
NIOSHTIC No.
10006716
Abstract
Mercury is removed from cyanide solutions, obtained by the cyanidation of gold ores, by mixing with a sulfide, preferably silver sulfide or zinc sulfide, to precipitate the mercury as insoluble HgS, which is filtered. Thus, 40 ml of a leach solution at ph 10 containing Au 20, Hg 10, Ag 10, and NaCn 500 mg/l is treated with 60 mg of Ag2S. Ninety-nine percent of the mercury from the leach solution was precipitated as HgS, which was separated by centrifugation.
Publication Date
19810301
Document Type
Patent
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
P 11-81
NIOSH Division
RERC
Source Name
U.S. Pat. 4,256,707, Mar. 17, 1981; Chem. Abstr. 93:135,825P
State
NV
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