US2018290994A1PendingUtilityA1

Oxidation process to produce a purified carboxylic acid product via solvent displacement and post oxidation

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Assignee: EASTMAN CHEM COPriority: Jul 20, 2012Filed: Jun 11, 2018Published: Oct 11, 2018
Est. expiryJul 20, 2032(~6 yrs left)· nominal 20-yr term from priority
Inventors:Mesfin Ejerssa JankaKenny Randolph ParkerPaula MoodyAshfaq Shahanawaz ShaikhLee Reynolds PartinBradford Russell BowersMichael Charles Morrow
C07D 307/60C07D 307/68
66
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Claims

Abstract

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=alkyl, cycloalkyl and aryl), 5-HMF ethers (5-R′OCH 2 -furfural, where R′=alkyl, cycloalkyl and aryl), 5-alkyl furfurals (5-R″-furfural, where R″=alkyl, cycloalkyl and aryl), mixed feed-stocks of 5-HMF and 5-HMF esters and mixed feed-stocks of 5-HMF and 5-HMF ethers and mixed feed-stocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA, removing impurities from a crude carboxylic acid slurry in a liquid displacement zone to form a low impurity slurry stream.

Claims

exact text as granted — not AI-modified
We claim: 
     
         1 . A carboxylic acid composition comprising:
 (a) furan-2,5-dicarboxylic acid in an amount greater than 95 weight percent;   (b) b* value less than 9; and   (c) FFCA is present in a range of less than 1000 ppm   
     
     
         2 . A carboxylic acid composition according to  claim 1  where said furan-2,5-dicarboxylic acid is in an amount greater than 96 weight percent. 
     
     
         3 . A carboxylic acid composition according to  claim 2  where said where said FFCA is present in a range of less than 900 ppm. 
     
     
         4 . A carboxylic acid composition according to  claim 3  wherein said carboxylic acid composition has a b* value less than 6. 
     
     
         5 . A carboxylic acid composition according to  claim 3  wherein said carboxylic acid composition has a b* value less than 4. 
     
     
         6 . A carboxylic acid composition according to  claim 1  where said furan-2,5-dicarboxylic acid is in an amount greater than 98 weight percent. 
     
     
         7 . A carboxylic acid composition according to  claim 6  where said where said FFCA is present in a range of less than 500 ppm. 
     
     
         8 . A carboxylic acid composition according to  claim 7  wherein said carboxylic acid composition has a b* value less than 6. 
     
     
         9 . A carboxylic acid composition according to  claim 7  wherein said carboxylic acid composition has a b* value less than 4. 
     
     
         10 . A carboxylic acid composition according to  claim 1  where said furan-2,5-dicarboxylic acid is in an amount greater than 99 weight percent. 
     
     
         11 . A carboxylic acid composition according to  claim 10  where said where said FFCA is present in a range of less than 250 ppm. 
     
     
         12 . A carboxylic acid composition according to  claim 11  wherein said carboxylic acid composition has a b* value less than 6. 
     
     
         13 . A carboxylic acid composition according to  claim 11  wherein said carboxylic acid composition has a b* value less than 5. 
     
     
         14 . A carboxylic acid composition according to  claim 11  wherein said carboxylic acid composition has a b* value less than 4. 
     
     
         15 . A carboxylic acid composition according to  claim 10  where said where said FFCA is present in a range of less than 100 ppm. 
     
     
         16 . A carboxylic acid composition according to  claim 1  where said furan-2,5-dicarboxylic acid is in an amount greater than 99.5 weight percent. 
     
     
         17 . A carboxylic acid composition according to  claim 16  wherein said carboxylic acid composition has a b* value less than 4. 
     
     
         18 . A carboxylic acid composition according to  claim 16  where said where said FFCA is present in a range of less than 10 ppm. 
     
     
         19 . A carboxylic acid composition according to  claim 18  wherein said carboxylic acid composition has a b* value less than 2.

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