Process for the formation of hydrocarbyl BIS(hydrocarbyl phosphate)
US6136997A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1994 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Nov 1, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the synthesis of a hydrocarbyl bis(dihydrocarbyl phosphate), such as a hydrocarbyl bis(diaryl phosphate), comprises the reaction of an unstable hydrocarbyl-containing diol, such as an aromatic group-containing diol, with a dihydrocarbyl halophosphate, such as diphenyl chlorophosphate, in the presence of a Lewis acid catalyst, such as magnesium dichloride, in the additional presence of an effective amount (e.g., up to about 100% by weight of diol and halophosphate) of a liquid hydrocarbon, such as an aliphatic hydrocarbon, like heptane, or an aromatic hydrocarbon, such as toluene, to enhance the removal of hydrogen halide by-product and thereby increase the yield of hydrocarbyl bis(dihydrocarbyl phosphate).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.