| 摘要 |
PROBLEM TO BE SOLVED: To enable to produce the 1,6-hexanediol by directly hydrogenating adipic acid, hydroxycaproic acid or caprolactone in the presence of a specific catalyst in relative mild conditions. SOLUTION: This method for producing 1,6-hexanediol comprises hydrogenating a compound selected from adipic acid, hydroxycaproic acid and caprolactone in the presence of a catalyst containing Ru and Sn in a liquid phase. The coexistence of a Pt component in addition to the Ru and Sn components in the catalyst is preferable because of improving the catalytic activity. The catalyst is preferably used as a carrier type catalyst produced by carrying the active components on a porous carrier. The porous carrier is preferably activated carbon. The hydrogenation reaction is preferably carried out in the presence of the catalyst in an amount of 0.1-100 pts.wt. per 100 pts.wt. of the reaction raw material such as adipic acid at 100-250 deg.C at 1-25 MPa. When used, the solvent is preferably water. Examples of the raw material include a raw material recovered from the oxidation reaction solution of cyclohexane. |
