Sulfide treatment to inhibit mercury adsorption onto activated c

Details Sulfide treatment to inhibit mercury adsorption onto activated c Sulfide treatment to inhibit mercury adsorption onto activated c

1986-04-11

1988-03-29

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 30, 423 31, 423109, 75 2, 75 97A, 75101R, 75105, 75118R, C01G 700

Patent

active

047342706

ABSTRACT:
In this invention sulfide compounds are added to mercury and precious metal-containing carbonaceous ore slurries prior to the slurry being processed by a carbon-in-pulp system. The sulfide compound inhibits the mercury from being adsorbed onto the activated carbon by reacting with the mercury to form mercuric sulfide and by inhibiting the dissolution of mercury from the ore. The mercuric sulfide precipitate displays no activity toward the activated carbon. The sulfiding procedure is performed with a sufficient amount of sulfide-providing compound to provide at least about 30 times the stoichiometric amount of sulfide ions required to react with the mercury in the ore slurry.

REFERENCES:
patent: 4256707 (1981-03-01), Flynn, Jr. et al.
patent: 4289532 (1981-09-01), Matson et al.
patent: 4528166 (1985-07-01), McDougall
patent: 4552589 (1985-11-01), Mason et al.
patent: 4578163 (1986-03-01), Kunter et al.

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