Furan-2, 5-dicarboxylic acid purge process

Patent metadata

Field	Value
Publication number	US-11027219-B2
Application number	US-201916552313-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	May 8, 2014
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

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 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 20 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 20 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 20 ppm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 20 ppm to about 2.0 wt %,

wherein said process further comprises routing a portion of said impurity rich waste stream to a solid-liquid separation zone comprising at least one continuous pressure drum filter to form a purge mother liquor stream.

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 20 ppm to about 2.0 wt %,
(ii) levulinic acid in an amount ranging from about 20 ppm to about 2.0 wt %,
(iii) succinic acid in an amount ranging from about 20 pm to about 2.0 wt %, and
(iv) acetoxy acetic acid in an amount ranging from about 20 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

• B01D3/40 Primary

  Extractive distillation · CPC title

• B01J27/32

  of catalysts comprising compounds of halogens · CPC title

• B01J38/12

  Treating with free oxygen-containing gas · CPC title

• B01D1/00

  Evaporating ({evaporation in general, e.g. of liquids for gas phase reactions B01B1/005} ; removal of incrustation B08B; preparation of starch C08B30/00; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26) · CPC title

• Y02P20/584

  Recycling of catalysts · CPC title