Purification of 1,4-bis (4-phenoxybenzoyl)benzene by centrifugal filtration
US10344125B2 · kind B2 · utility
9Cited by
7References
15Claims
0Family size
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Key dates
| Filing date | May 17, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | May 17, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2650/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for manufacturing 1,4-bis(4-phenoxybenzoylbenzene), 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-phenoxybenzoylbenzene)-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-phenoxybenzoylbenzene); subjecting at least the second phase to a solid/liquid separation step by centrifugal filtration, so as to recover solid 1,4-bis(4-phenoxybenzoylbenzene).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.