Process of purifying dihydrocarbylchlorothiophosphates
US5955626A · kind A · utility
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4References
27Claims
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Key dates
| Filing date | Feb 12, 1999 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Feb 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Crude dihydrocarbylchlorothiophosphate product contaminated with dihydrocarbylpolysulfide and/or dihydrocarbylchlorophosphate is upgraded by treating the crude product with chlorine followed by an aqueous solution of reducing agent, separating an aqueous phase from the organic, then drying to obtain the resultant product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.