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US 9,604,202 B2Granted
Furan-2,5-dicarboxylic acid purge process
AssigneeEastman Chemical Company
InventorsKenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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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.
Claims12
A process to produce an impurity rich waste stream in a furan-2,5-dicarboxylic 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 %.
3 more elements
Dependencies are inferred from the claim text.