Furan-2,5-dicarboxylic acid purge process

Patent metadata

Field	Value
Publication number	US-2015321119-A1
Application number	US-201414317782-A
Country	US
Kind code	A1
Filing date	Jun 27, 2014
Priority date	May 8, 2014
Publication date	Nov 12, 2015
Grant date	—

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 an impurity rich waste stream stream in a carboxylic acid process, said process comprising:
contacting a mother liquor in a solvent recovery zone to produce said impurity rich waste stream; wherein said mother liquor stream comprises at least one of the following:
(i) 2,5-diformylfuran in an amount ranging from about 150 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 150 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 150 ppm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 150 ppm to about 2.0 wt %.

2 . A process according to claim 1 wherein said process further comprises routing a portion of said impurity rich waste stream to a solid-liquid separation zone to form a purge mother liquor stream.

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

4 . A process according to claim 1 wherein said process further comprises routing said extraction feed stream to an extraction zone to form a purge stream, a raffinate stream, and an extract stream.

5 . A process according to claim 1 wherein said solvent recovery zone comprises at least one evaporator.

6 . A process according to claim 1 wherein impurity rich waste stream is a slurry with weight % solids greater than 10%.

7 . A process according to claim 1 wherein impurity rich waste stream is a slurry with weight % solids greater than 30%.

8 . A process according to claim 1 wherein impurity rich waste stream is a slurry with weight % solids greater than 50%.

9 . A process according to claim 1 wherein said solvent recovery zone comprises at least two evaporators.

10 . A process according to claim 1 wherein said mother liquor stream comprises at least two of the following:
(i) 2,5-diformylfuran in an amount ranging from about 150 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 150 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 150 ppm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 150 ppm to about 2.0 wt %.

11 . A process according to claim 1 wherein said mother liquor stream comprises at least three of the following:
(i) 2,5-diformylfuran in an amount ranging from about 150 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 150 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 150 ppm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 150 ppm to about 2.0 wt %.

12 . A process according to claim 1 wherein said mother liquor stream comprises:
(i) 2,5-diformylfuran in an amount ranging from about 150 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 150 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 150 ppm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 150 ppm to about 2.0 wt %.

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

• C07D307/48

  Furfural · CPC title

• B01D3/14

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

• C07B41/08

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

• B01D3/06

  Flash distillation · CPC title