论文部分内容阅读
在乙腈体系中,研究了不同金属卤化物对CO2与1,2-丙二醇(PG)反应合成碳酸丙烯酯(PC)的催化性能,确定了该反应的最佳条件,同时对反应过程中的副反应进行了讨论,对生成的副产物进行了分析。实验结果表明,CO2与PG反应合成PC时,FeCl3催化剂的活性最高;以100mmol PG为基准,在乙睛10mL、FeCl3催化剂2.5mmol、反应压力10MPa、反应温度160℃、反应时间15h的最佳条件下,PC收率为26.5%,PG转化率为42.5%。乙睛在该反应体系中不仅起到溶剂的作用同时还起到了脱水剂的作用,除去了反应过程中生成的部分水,打破了原有的热力学平衡,大幅度提高了PC收率。
In acetonitrile system, the catalytic performance of different metal halides on the synthesis of propylene carbonate (PC) from CO2 and 1,2-propanediol (PG) has been studied. The optimal conditions for the reaction have been determined. At the same time, The reaction was discussed and the by-products formed were analyzed. The experimental results show that the optimum conditions for the synthesis of PC are: FeCl3 catalyst with 100 mmol PG as the base, 10 mL acetonitrile, 2.5 mmol FeCl3 catalyst, 10 MPa reaction pressure, 160 ℃ reaction temperature and 15h reaction time The PC yield was 26.5% and the PG conversion was 42.5%. Acetone not only acts as a solvent in the reaction system but also acts as a dehydrating agent to remove part of the water generated during the reaction, breaking the original thermodynamic equilibrium and greatly increasing the yield of PC.