Process for producing ammonium polythimolybdate
US6953565B2 · kind B2 · utility
1Cited by
7References
5Claims
0Family size
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Key dates
| Filing date | Oct 24, 2003 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Oct 24, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G39/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.