Ripening of 1,4-bis (4-phenoxybenzoyl)benzene
US10981852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2018 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | May 17, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/45
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for manufacturing 1,4-bis(4-phenoxybenzoyl)benzene, including: reacting terephthaloyl chloride with diphenyl ether in a reaction solvent and in the presence of a Lewis acid, so as to obtain a product mixture including a 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex; contacting the product mixture with a protic solvent, so as to obtain a first phase containing the Lewis acid and a second phase containing 1,4-bis(4-phenoxybenzoyl)benzene; heating at least the second phase up to a maximum temperature, followed by cooling the second phase down to a separation temperature; subjecting at least the second phase to a solid/liquid separation step at the separation temperature, so as to recover solid 1,4-bis(4-phenoxybenzoyl)benzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.