关键词: 超临界正己烷, 松香酯, 氢解还原反应, 松香醇

Abstract: Reduction of a series of monobasic alcohol abietates over Cu-Zn catalysts was studied in supercritical hexane phase. The effects of the amount of Cu-Zn catalyst, and hexane, reaction temperature, reaction pressure, and reaction time on the conversion rate and selectives of abietate were investigated. Methyl abietate, butyl abietate, and octyl abietate were used as materials. The conversion rates reached 87.9%, 75.0% and 69.9%, the selectivities reached 93.4%, 92.4% and 92.8%, and the yields of abietinol reached 82.1%, 69.3% and 64.9%, respectively, when the reaction was conducted under the conditions of abietate 15 g, the amount of Cu-Zn catalyst 10%, the ratio of m(abietate) to m(hexane) 1:3, temperature 270 ℃, pressure 10 MPa, and reaction time 11 h. The analysis results of FT-IR and GC-MS showed that the ester group of abietate was reduced to hydroxyl group and the main components of the reduction products were dihydropimaric alcohol, dihydroabietic alcohol, tetrahydroabietic alcohol, and dehydropimaric alcohol.

Key words: supercritical hexane, abietate, reduction, abietinol