NIOSHTIC-2 Publications Search

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
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
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division