Process for producing ammonium polythimolybdate

Details Process for producing ammonium polythimolybdate Process for producing ammonium polythimolybdate

2005-10-11

2005-10-11

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

C423S517000

Reexamination Certificate

active

06953565

ABSTRACT:
A process for producing an ammonium polythiomolybdate of the formula (NH4)2Mo3S13.n H2O where n is 0, 1 or 2 in which an aqueous ammoniacal molybdate solution is reacted with hydrogen sulfide gas in a closed system at superatmospheric pressure until the H2S is no longer absorbed by the solution to form a slurry of solid ammonium tetrathiomolybdate containing a portion of the starting molybdenum in a mother liquor containing the balance of the molybdenum and thereafter heat soaking the reaction product in the presence of elemental sulfur to form the desired product.

REFERENCES:
patent: 2556255 (1951-06-01), Carosella
patent: 2892741 (1959-06-01), Spengler et al.
patent: 3173754 (1965-03-01), Kurtak
patent: 3764649 (1973-10-01), Kurtak et al.
patent: 3876755 (1975-04-01), Kurtak et al.
patent: 4242328 (1980-12-01), Hem et al.
patent: 4604278 (1986-08-01), Reilly et al.
patent: WO95/29126 (1995-11-01), None
Mueller et al., “Molybdenum-sulfur clusters”, Inorganic Syntheses, vol. 27, pp. 47-51, 1990.
Chemical Abstract accession No. 114:113911: “Molybdenum-sulfur clusters”, Mueller et al., published 1990.
XP-002318423, Chemical Abstracts Service, A. Mueller et al., accession No. 119 :151081 ,1993, “Molybdenum(IV) Sulfide-Disulfide Complex ('MoIV3S(S2)612-) from Amorphous Molybdenum Trisulfide by the Reaction with Hydroxide and R =0.015 Structure of (NH4)2'MoIV3S(S2)6I.H2O”.
XP-002318424, Chemical Abstracts Service, A. Mueller et al., accession No. 116:98146, 1991, “Studies on the Triangular 'Molybdate-Disulfido-Sulfidol Cluster 'Mo3S1312-; Electronic Structure (X.alpha.calculations, XPS), Crystal Structure of (Ph4As)2'Mo3S13!.2CH3CN and a Refinement of the Crystal Structure of (NH4)2'Mo3S13!.H2O”.

Affiliated with

Also associated with

Rating

Process for producing ammonium polythimolybdate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing ammonium polythimolybdate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing ammonium polythimolybdate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3456530