Purifying crude furan 2,5-dicarboxylic acid by hydrogenation and a purge zone
US9944615B2 · kind B2 · utility
14Cited by
5References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 1, 2016 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jul 1, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0446
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) by hydrogenation of a FDCA composition dissolved in a hydrogenation solvent such as water, and hydrogenating under mild conditions, such as at a temperature within a range of 130° C. to 225° C. by contacting the solvated FDCA composition with hydrogen in the presence of a hydrogenation catalyst under a hydrogen partial pressure within a range of 10 psi to 900 psi. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid (FFCA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.