石油炼制与化工 ›› 2022, Vol. 53 ›› Issue (1): 41-45.

• 基础研究 • 上一篇    下一篇

离子液体催化CO2与环氧丙烷合成碳酸丙烯酯的反应动力学研究

陈亚辉1,赵文凯1,史莉莉1,陈书武2,郭立颖1   

  1. 1. 沈阳工业大学石油化工学院
    2. 中国石油辽阳石化公司
  • 收稿日期:2021-09-02 修回日期:2021-09-24 出版日期:2022-01-12 发布日期:2021-12-24
  • 通讯作者: 郭立颖 E-mail:lyguo1981@163.com
  • 基金资助:
    聚醚/复盐离子液体基固载化催化剂的制备及在二氧化碳连续转化中应用;合成碳酸酯的超分子离子液体催化剂的分子结构设计与可控制备

STUDY ON REACTION KINETICS OF SYNTHESIZING PROPYLENE CARBONATE FROM CARBON DIOXIDE AND PROPYLENE OXIDE CATALYZED BY IONIC LIQUIDS

  • Received:2021-09-02 Revised:2021-09-24 Online:2022-01-12 Published:2021-12-24

摘要: 利用合成改性的复合离子液体催化剂(CMIL)催化CO2与环氧丙烷(PO)生成碳酸丙烯酯(PC),通过正交试验优化工艺参数,考察CMIL的催化性能。根据亲核反应机理,建立反应过程动力学方程,回归得到动力学方程参数。结果表明:CMIL具有很好的催化性能,当温度为95 ℃、压力为1.5 MPa、催化剂用量(催化剂与反应原料的质量比)为2.0%的条件下,PO转化率为99.98%,PC选择性为98.87%;在一定温度和压力下,PC的合成反应速率与催化剂浓度和PO浓度均成线性关系。

关键词: 离子液体, 催化性能, 正交实验, 二氧化碳, 碳酸丙烯酯, 动力学方程

Abstract: The synthesis of propylene carbonate (PC) using carbon dioxide and 1,2-epoxypropane catalyzed by the composite-modified ionic liquid (CMIL) catalyst was studied. According to the mechanism of nucleophilic reaction, the kinetic equation of the reaction process was established, the parameters of the kinetic equation were obtained by regression. The results show that CMIL has good catalytic performance. Under the conditions of a temperature of 95℃, a pressure of 1.5 MPa, a catalyst dosage of 2.0%, the PO conversion rate is 99.98%,and the PC selectivity is 98.87%. The reaction rate of propylene carbonate is linear relationship with the concentration of catalyst and 1,2-epoxypropane.

Key words: lonic liquid, catalytic performance, orthogonal experiment, carbon dioxide, propylene carbonate, kinetic equation