To provide a method for industrially and advantageously producing the corresponding alicyclic polyvalent carboxylic acid and an acid anhydride thereof by hydrogenating aromatic polyvalent carboxylic acids (an aromatic polyvalent carboxylic acid or an acid anhydride thereof).
The aromatic polyvalent carboxylic acid or the acid anhydride thereof is reacted with an aliphatic alcohol in the presence of a noble metal catalyst having a hydrogenating catalytic ability such as a ruthenium catalyst to afford an ester compound. The aromatic ring is subsequently hydrogenated in the presence of the catalyst. A solid acid catalyst such as an ion exchange resin catalyst is then made to exist to carry out hydrolysis. Thereby, the alicyclic polyvalent carboxylic acid is obtained. The resultant alicyclic polyvalent carboxylic acid is further cyclodehydrated to afford the alicyclic polyvalent carboxylic acid anhydride.
COPYRIGHT: (C)2006,JPO&NCIPI
Munehito Nagai
Genki Takeuchi
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Tomohiro Nakamura
Eiichi Sano