C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
23/128, 53/177,
C22B 61/00 (2006.01) C01G 7/00 (2006.01) C01G 30/00 (2006.01) C22B 3/00 (2006.01) C22B 3/08 (2006.01) C22B 15/00 (2006.01) C22B 30/02 (2006.01) C22B 43/00 (2006.01)
Patent
CA 1081469
ABSTRACT A process is disclosed for treating mixed metal sulfides containing trivalent antimony sulfide wherein the sulfide concentrates are leached with an excess of sodium sulfide in order to isolate copper sulfide and other insol- ubles in solid form while solubilizing the remaining metal sulfides and producing sodium thioantimonite, separating the insoluble sulfides from the solution; oxidizing the sodium thioantimonite with elemental sulfur to produce sodium thio- antimonate in solution; crystallizing a portion of the sodium thioantimonate along with other available metal sulfides from solution; and recirculating the remainder of the solution to the sodium sulfide leach stage. The crystallized metal sul- fides may be further treated, isolated, and recovered as de- sired.
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