| 摘要 |
PROBLEM TO BE SOLVED: To obtain a diol mixture useful as a raw material for polyester resin, urethane foam or the like in high yield by directly hydrogenating, namely, reducing a mixture of dicarboxylic acids. SOLUTION: This mixture of 1,4-butanediol and a compound of the formula: HO-CH2-R-CH2OH is obtained by introducing a dicarboxylic acid mixture of succinic acid and a compound of the formula: HOOC-R-COOH (R is a 3-20C alkylene), a catalyst carrying Ru-Sb-Pt on a carbonaceous carrier (e.g. activated carbon) treated with a aqueous solution of hydrogen peroxide and/or ozone and water into an autoclave, injecting hydrogen thereinto and reacting preferably under the condition of 100-300 deg.C temperature and 1-25 MPa pressure. The raw material dicarboxylic acid mixture is preferably recovered from an oxidation reaction liquid of cyclohexanone and/or cyclohexanol. |
