NIOSHTIC-2 Publications Search

Selective removal of mercury from cyanide solutions.

Authors
Flynn CM Jr.; Carnahan TG; Lindstrom RE
Source
US Pat 4,256,707 1981 Mar; :1-4
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.
Keywords
Metals; Metallurgical processes; Metal compounds; Gold; Cyanide compounds; Mercury
CAS No.
7439-97-6
Publication Date
19810317
Document Type
Patent
Fiscal Year
1981
Identifying No.
P 11-81
NIOSH Division
RERC
Source Name
United States Patent 4,256,707
State
NV
Page last reviewed: June 10, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division