| Direct synthesis of propylene carbonate from propylene and carbon dioxide catalyzed by quaternary ammonium heteropolyphosphatotungstate–TBAB system |
| |
| 作者姓名： | Gongda Zhao Yi Zhang Hengyun Zhang Jun Li Shuang Gao |
| |
| 作者单位： | Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian National Laboratory for Clean Energy;State Key Laboratory of Fine Chemicals,Dalian University of Technology;University of Chinese Academy of Sciences |
| |
| 摘 要： | In this paper,we have developed a highly efficient method for the direct preparation of propylene carbonate from propylene and carbon dioxide(CO2) using quaternary ammonium heteropolyphosphatotungstate–quaternary ammonium halide catalytic system with anhydrous hydrogen peroxide as an oxidant through one-pot two-step process.The effects of the amount of tetrabutylammonium bromide(TBAB),the concentration of hydrogen peroxide and other reaction conditions were investigated.The catalyst system gave an optimum propylene oxide yield(91%) at75°C in oxidation step and the highest propylene carbonate yield(99%) at 140°C and 3.0 MPa in cycloaddition step.Based on the results,a reaction mechanism has been proposed.
|
| 关 键 词： | quaternary ammonium heteropolyphosphatotungstate propylene carbonate carbon dioxide tetrabutylammonium bromide |
| 本文献已被 CNKI 等数据库收录！ |
