Method for purification of a biphenol tetraacid composition and a biphenol tetraacid composition
US11623908B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Jan 30, 2020 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jan 30, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1046
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for purification of a biphenol tetraacid composition includes contacting the biphenol tetraacid composition with a solvent including a C1-6 alcohol to form a slurry and isolating the purified biphenol tetraacid from the slurry. The biphenol tetraacid composition includes a biphenol tetraacid and a biphenol. A purified biphenol tetraacid composition is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.