The Catalytic Hydrogenation Synthesis of Benzoic Acid to Cyclohexanecarboxylic Acid by Pd/ACF Catalyst
Shao Jianhua;Ning Jianbo;Xu Wei;Jiangsu Qingquan Chemical Co.,Ltd;Zhejiang Taizhou Qingquan Medical & Chemical Co.,Ltd, Zhejiang Middle-high Pressure CatalyticHydrogenation Engineering Research Center;
The effects of reaction conditions on the catalytic hydrogenation of benzoic acid to cyclohexanecarboxylic acid including catalysts, solvent, reaction temperature and pressure were investigated. The results indicated that Pd/ACF and Ni/Sn/Ag metal auxiliary catalyst exhibited higher activity. When the reaction proceeded in the conditions of 130 ~150 ℃ and 2.5 ~3.5 MPa, the conversion of benzoic acid reached 99.9% with 99.5% selectivity of cyclohexanecarboxylic acid. The catalysts efficiently inhibit the side reaction and increase the yield of product.