Process for preparing liquid triaryl thiophosphate mixtures
US4724265A · kind A · utility
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3References
16Claims
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Key dates
| Filing date | May 15, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | May 15, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Liquid mixed triaryl thiophosphate mixtures can be prepared by forming a mixture of phenol and substituted phenols, forming a phosphite from that mixture and sulfurizing the phosphite, washing the thiophosphate with aqueous base, and drying the so washed thiophosphate under mild conditions. The products are liquid while containing at least 25 percent symmetrical triaryl thiophosphate. Colorless and odorless products are prepared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.