Ester compound
US-2024025838-A1 · Jan 25, 2024 · US
Purifying crude furan 2,5-dicarboxylic acid by hydrogenation
US8969404B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8969404-B2 |
| Application number | US-201313758080-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 4, 2013 |
| Priority date | Jun 22, 2012 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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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).
First claim
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What we claim is: 1. A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) comprising: a) providing a cFDCA composition comprising furan 2,5-dicarboxylic acid (FDCA) solids, 5-formyl furan-2-carboxylic acid (FFCA), and a oxidation solvent composition; b) combining a hydrogenation solvent composition with said FDCA solids and dissolving at least a portion of the FDCA solids to thereby produce a solvated FDCA (sFDCA) composition comprising dissolved FDCA,…
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- C07D307/68Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US8969404B2 cover?
- 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 part…
- Who is the assignee on this patent?
- Eastman Chem Co
- What technology area does this patent fall under?
- Primary CPC classification C07D307/68. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).