Process for controlling reaction and crystallization solvent composition in process for production of aromatic carboxylic acid
||WO 2015053962 A1
||Sep 26, 2014
||Apr 16, 2015
Processes have been developed to obtain recycle ionic liquid streams which are active for oxidation of alkyl aromatic compounds, and which reduce the amount of 4-CBA in the solid oxidation products. The process can reduce the makeup amount of ionic liquid, carboxylic acid, catalyst, bromine source, and ammonia source. Volatile components, including carboxylic acid, such as acetic acid, and water, and solid components, such as aromatic carboxylic acids and other crystallized products, are removed, and the proper proportion of fresh or recycled carboxylic acid, water, and ammonia source or other base are added.