Furan-2,5-dicarboxylic acid purge process

Patent metadata

Field	Value
Publication number	US-9573120-B2
Application number	US-201414317588-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	May 8, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

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

We claim:

1. A process to produce a purge mother liquor stream said process comprising:
(a) contacting a mother liquor stream in a solvent recovery zone to form an impurity rich waste stream; wherein said mother liquor stream is produced in a 5-HMF oxidation process to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic;
(b) routing a portion of said impurity rich waste stream to a solid-liquid separation zone to form a purge mother liquor stream.

2. A process according to claim 1 wherein said process further comprises routing a portion of said purge mother liquor stream to a mix zone to form an extraction feed stream.

3. A process according to claim 2 wherein said process further comprises routing said extraction feed stream and extraction zone to form a purge stream and an extract stream.

4. A process according to claim 3 wherein said solvent recovery zone comprise at least one evaporator.

5. A process according to claim 4 wherein impurity rich waste stream is a slurry with weight % solid greater than 10%.

6. A process according to claim 4 wherein impurity rich waste stream is a slurry with weight % solid greater than 30%.

Assignees

• Eastman Chem Co

Inventors

• Parker Kenny
• Janka Mesfin
• Shaikh Ashfaq
• Partin Lee

Classifications

• C07B63/00

  Purification; Separation (separation of optically-active compounds C07B57/00); Stabilisation; Use of additives · CPC title

• B01D3/06

  Flash distillation · CPC title

• C07B41/08

  of carboxyl groups or salts, halides or anhydrides thereof · CPC title

• C07D307/48

  Furfural · CPC title

• B01D3/14

  Fractional distillation {or use of a fractionation or rectification column} · CPC title