Patent ID: 9725394
Date: 2017-08-08
CPC Classifications: C07C

Claim:
1. A composition for preparing terephthalic acid; said composition consisting essentially of: i. p-Toluic acid in an amount of 0.05% to 4% with respect to the total mass of the composition; ii. at least one catalyst in an amount of 0.02% to 2.5% with respect to the total mass of the composition; iii. at least one ionic liquid in an amount of 0.04% to 50% with respect to the total mass of the composition; iv. at least one carboxylic acid solvent; and v. p-xylene, said composition when used in the preparation of terephthalic acid, results in the formation of less than 2000 ppm of 4-carboxy-benzaldehyde (4-CBA).