Process for forming hydrocarbyl bisphosphate compound
US5420327A · kind A · utility
9Cited by
8References
6Claims
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Key dates
| Filing date | Sep 10, 1993 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Sep 10, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hydrocarbyl bisphosphate compounds containing hindered aryl substituents in the phosphate groups can be formed by: (a) reacting a hindered phenol, e.g., xylenol, with a phosphorus oxytrihalide, e.g., phosphorus oxytrichloride, to form a reaction product mixture; and (b) combining the reaction product, without distillation of the product from the reaction product mixture, from (a) mixture with a hydrocarbyl diol, e.g., one containing a phenyl ring such as hydroquinone or resorcinol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.