Purifying crude furan 2,5-dicarboxylic acid by hydrogenation
US-8969404-B2 · Mar 3, 2015 · US
Oxidation process to produce a crude and/or purified carboxylic acid product
US9428480B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9428480-B2 |
| Application number | US-201414495785-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 24, 2014 |
| Priority date | May 24, 2011 |
| Publication date | Aug 30, 2016 |
| Grant date | Aug 30, 2016 |
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Abstract
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Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
First claim
Opening claim text (preview).
We claim: 1. A carboxylic acid composition comprising furan-2,5-dicarboxylic acid solids, said solids comprising: (a) furan-2,5-dicarboxylic acid in an amount greater than 90 weight percent; (b) a b* value of less than 15; (c) 5-formyl furan-2-carboxylic acid (FFCA) in a range of from about 0.1 to about 4.0 weight percent; and (d) 5-(ethyoxycarbonyl)furan-2-carboxylic acid (EFCA) in an amount from 0.1 to 4 wt %. 2. A carboxylic acid composition according to claim 1 where said furan-2,5-dicarboxylic acid is in an amount greater than 92 weight percent. 3. A carboxylic acid composition according to claim 2 wherein said carboxylic acid composition has a b* value of less than 10. 4. A carboxylic acid composition according to claim 2 wherein said carboxylic acid composition has a b* value of less than 5. 5. A carboxylic acid composition according to claim 1 where said furan-2,5-dicarboxylic acid is in an amount greater than 94 weight percent. 6. A carboxylic acid composition according to claim 5 wherein said carboxylic acid composition has a b* value of less than 10. 7. A carboxylic acid composition according to claim 5 wherein said carboxylic acid composition has a b* value of less than 5. 8. A carboxylic acid composition according to claim 1 where said furan-2,5-dicarboxylic acid is in an amount greater than 96 weight percent. 9. A carboxylic acid composition according to claim 8 wherein said carboxylic acid composition has a b* value of less than 10. 10. A carboxylic acid composition according to claim 8 wherein said carboxylic acid composition has a b* value of less than 5. 11. A carboxylic acid composition according to claim 1 where said furan-2,5-dicarboxylic acid is in an amount greater than 98 weight percent.
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- C07D307/68Primary
Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen · CPC title
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- What does patent US9428480B2 cover?
- Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing…
- 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 Aug 30 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).