Process for purifying an acid composition comprising 2-formyl-furan-5-carboxylic acid and 2,5-furandicarboxylic acid
US9896425B2 · kind B2 · utility
1Cited by
0References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2014 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Sep 26, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B63/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An acid composition comprising 2-formyl-furan-5-carboxylic acid and 2,5-furandicarboxylic acid is purified in a process which comprises; contacting the acid composition with an alcohol to obtain an esterified composition; and separating the ester of 2-formyl-furan-5-carboxylic acid from the esterified composition to obtain a purified esterified product; and contacting the purified esterified composition with water for saponification or hydrolysis, to obtain a product composition, comprising 2,5-furandicarboxylic acid and a reduced amount of 2-formyl-furan-5-carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.