Patent ID: 6740773
Filing Date: 2004-05-25
Classification: C07C

Abstract:
A process for preparing cyclohexanedicarboxylic esters comprising esterifying a benzenedicarboxylic acid or a benzenedicarboxylic acid anhydride with an aliphatic monoalcohol of 4 to 14 carbon atoms in the presence of an acid or of a member of the group consisting of titanium, zirconium and tin, at 100 to 250Â° C., with removal of any water formed, neutralization of the reaction mixture once the esterification has been completed by adding an alkaline reagent, hydrogenating the neutralized esterification mixture where appropriate after removal of the water generated by the neutralization without other pretreatment in the presence of a nickel catalyst, and isolating the cyclohexanedicarboxylic ester by separating off the by-products from the reaction mixture.