Production of ammonium tetrathiomolybdate

Details Production of ammonium tetrathiomolybdate Production of ammonium tetrathiomolybdate

1985-05-17

1986-08-05

Doll, John

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01G 3900

Patent

active

046042784

ABSTRACT:
A process is disclosed for producing ammonium tetrathiomolybdate. The process involves reacting an ammoniacal molybdate solution with hydrogen sulfide gas, the solution and the gas being in a closed system and the flow of the gas being regulated at an elevated pressure to form a slurry consisting essentially of a solid essentially all of which is ammonium tetrathiomolybdate containing a portion of the starting molybdenum and a mother liquor containing the balance of the molybdenum. The slurry is then cooled to ambient temperature and the solid is removed from the major portion of the mother liquor. The solid is then washed with water and with alcohol followed by removal of the resulting respective water and alcohol washes to remove the remaining portion of the mother liquor and soluble impurities from the solid. The resulting washed solid is then dried at ambient temperature to form the final ammonium tetrathiomolybdate.

REFERENCES:
patent: 2556255 (1951-06-01), Carosella
patent: 2892741 (1959-06-01), Spengler et al.
patent: 3764649 (1973-10-01), Kurtak et al.
patent: 3876755 (1975-04-01), Kurtak et al.
patent: 4242328 (1980-12-01), Hem et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 9 (1980), pp. 367-369, John Wiley & Sons.

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