Oxidation process to produce a purified carboxylic acid product via solvent displacement and post oxidation
US-9029580-B2 · May 12, 2015 · US
Oxidation process to produce a purified carboxylic acid product via solvent displacement and post oxidation
US9266850B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9266850-B2 |
| Application number | US-201514692416-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 21, 2015 |
| Priority date | Jul 20, 2012 |
| Publication date | Feb 23, 2016 |
| Grant date | Feb 23, 2016 |
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Abstract
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Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH 2 -furfural where R is alkyl, cycloalkyl, or aryl), 5-HMF ethers (5-R′OCH 2 -furfural where R′ is alkyl, cycloalkyl, or aryl), 5-alkyl furfurals (5-R″-furfural where R″ is alkyl, cycloalkyl, or aryl), mixed feedstocks of 5-HMF and 5-HMF esters, mixed feedstocks of 5-HMF and 5-HMF ethers, and mixed feedstocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA.
First claim
Opening claim text (preview).
We claim: 1. A purified furan-2,5-dicarboxylic acid (pFDCA) having a furan-2,5-dicarboxylic acid content of greater than 98% by weight, less than 900 ppm of 5-formyl furan-2-carboxylic acid (FFCA), and a b* value of less than 9. 2. The pFDCA according to claim 1 , which comprises less than 500 ppm of FFCA. 3. The pFDCA according to claim 1 , which comprises less than 250 ppm of FFCA. 4. The pFDCA according to claim 1 , which comprises less than 100 ppm of FFCA. 5. The pFDCA according to claim 1 , which comprises less than 10 ppm of FFCA. 6. The pFDCA according to claim 1 , which has a b* value of less than 6. 7. The pFDCA according to claim 1 , which has a b* value of less than 5. 8. The pFDCA according to claim 1 , which has a b* value of less than 4. 9. The pFDCA according to claim 1 , which has a b* value of less than 2. 10. The pFDCA according to claim 1 , which has a furan-2,5-dicarboxylic acid content of greater than 99% by weight. 11. The pFDCA according to claim 1 , which has a furan-2,5-dicarboxylic acid content of greater than 99.5% by weight.
Assignees
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Classifications
- C07D307/68Primary
Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen · CPC title
Two oxygen atoms, e.g. succinic anhydride · CPC title
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- What does patent US9266850B2 cover?
- Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH 2 -furfural where R is alkyl, cycloalkyl, or aryl), 5-HMF ethers (5-R′OCH 2 -furfural where R′ is alkyl, cycloalkyl, …
- 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 Feb 23 2016 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).