Furan-2,5-dicarboxylic acid purge process

摘要

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.

主权项

1. 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 %.