Patent ID: 6953565
Filing Date: 2005-10-11
Classification: C01G

Abstract:
1. A process for producing an ammonium polythiomolybdate of the formula (NH 4 ) 2 Mo 3 S 13 .n H 2 O where n is 0, 1 or 2 comprising: (a) reacting an aqueous ammoniacal molybdate solution with hydrogen sulfide gas in a closed system at superatmospheric pressure until the H (b) heat soaking the slurry of step (a) in a closed reactor in the presence of elemental sulfur at a pressure of 600-1000 psig whereby the ammonium tetrathiomolybdate is converted to (NH (c) cooling the slurry of step (b) to ambient temperature; (d) separating said solid from the major portion of said mother liquor; (e) washing said solid with water to remove the remaining portion of said mother liquor and soluble impurities from said solid; and (f) drying the resulting washed solid.