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PROCESS FOR PRODUCING MOLYBDENUM DISULFIDE

Datetime:2016/7/19 22:27:05hit:10500

PROCESS FOR PRODUCING MOLYBDENUM DISULFIDE. A process for producing molybdenum disulfide from molybdenite ore sources is disclosed wherein the ore is digested in sulfuric acid under controlled conditions for a specific length of time. After digesting, the impure solid molybdenum disulfide is removed and admixed with hydrofluoric acid and hydrochloric acid under controlled conditions for a specific length of time. The solid molybdenum disulfide is then removed and washed.

In accordance with one aspect of the invention, there is provided a process for producing molybdenum disulfide from molybdenite ore sources. The process comprises digesting molybdenite ore in sulfuric acid for at least about one hour at a temperature of at least about 240¡ã C to form the first two-phase system. The first two-phase system is diluted with water at least twofold before separating the impure solid phase from the aqueous phase. The separated impure solid phase is admixed with a solution consisting essentially of from about 0.5N to about 3.5N hydrofluoric acid and from about 0.5N to about 2.5N hydrochloric acid for at least about 6 hours at a temperature of at least about 70¡ã C to form the second two-phase system comprising a partially purified solid molybdenum disulfide and an aqueous phase. The partially purified solid molybdenum disulfide is separated from the aqueous phase, and thereafter washed to form pure molybdenum disulfide.