Process for making solid polyhalotriaryl phosphate esters
US4897502A · kind A · utility
2Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is provided for making halogen-substituted triaryl phosphate esters which are normally solid under ambient conditions. The process comprises reacting a halogenated phenol with phosphorus oxychloride in the presence of a magnesium chloride catalyst above the melting point of the desired product. After the reaction is complete the product is recovered by adding an alcohol, such as, pentanol, 2-ethyl hexanol or hexanol and cooling the resulting mixture below the melting point of the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.