论文部分内容阅读
研究了由卤化锌、三苯基膦、四丁基溴化铵3种组分组成的一种高效的催化体系,在温和条件下,对催化CO2与环氧烷耦合反应能够得到高的催化活性和选择性.系统考察了反应温度、CO2压力、反应时间和不同的催化剂组分对催化活性的影响.结果表明:催化体系Zn Br2/PPh3/n-Bu4NBr/PO的摩尔比为10︰1︰2︰1783,在CO2压力为3 MPa、反应时间5 h、反应温度为130℃及无任何有机溶剂的情况下产率可达98.1%.此催化体系对其他6种环氧烷也有很好的催化效果.
An efficient catalytic system consisting of zinc halide, triphenylphosphine and tetrabutylammonium bromide was studied. Under mild conditions, high catalytic activity can be obtained for the coupling reaction between CO2 and alkylene oxide And selectivity.The effects of reaction temperature, CO2 pressure, reaction time and different catalyst components on the catalytic activity were systematically investigated.The results showed that the molar ratio of Zn Br2 / PPh3 / n-Bu4NBr / PO was 10︰1︰1: 2: 1783, the yield is up to 98.1% under the conditions of CO2 pressure of 3 MPa, reaction time of 5 h, reaction temperature of 130 ℃ and without any organic solvent.The catalytic system is also good for the other six alkylene oxides Catalytic effect.