PROCESS FOR PRODUCING HYDROGENATED AROMATIC POLYCARBOXYLIC ACID AND PROCESS FOR PRODUCING HYDROGENATED AROMATIC POLYCARBOXYLIC ANHYDRIDE

摘要

PURPOSE: A process for producing hydrogenated aromatic polycarboxylic acid and a process for producing the hydrogenated aromatic polycarboxylic anhydride are provided to be used as a raw material for functional polyimides having properties such as transparency and solvent solubility and a curing agent for functional epoxy resins having transparency. CONSTITUTION: A process for producing a hydrogenated aromatic polycarboxylic acid is provided, wherein in hydrogenating an aromatic polycarboxylic acid by a batch system, the aromatic polycarboxylic acid is hydrogenated at a hydrogen partial pressure of 1 MPa or more in the presence of a catalyst containing noble metal comprising rhodium or palladium or both of them in a proportion of 0.5 to 10 parts by weight per 100 parts by weight of the aromatic polycarboxylic acid.