New procedure for recycling homogeneous catalyst: propylene carbonate synthesis under supercritical CO2 conditions
New procedure for recycling homogeneous catalyst: propylene carbonate synthesis under supercritical CO2 conditions
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DOI：
10.1039/b210007j
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发表时间：
2003
期刊：
影响因子：
9.8
通讯作者：
Liang He;H. Yasuda;T. Sakakura
中科院分区：
文献类型：
--
作者：
Liang He;H. Yasuda;T. Sakakura
多氟烷基碘化膦Rf3RPI(Rf=C4F9C2H4，C6F13C2H4，C8F17C2H4；R=Me，Rf)在超临界CO2条件下催化环氧丙烷和二氧化碳合成碳酸丙烯酯，碳酸亚丙酯自发地从超临界CO2相中分离出来。Rf3RPI催化剂可以在保持较高的CO2压力和温度的情况下循环使用，方法是将碳酸亚丙酯从反应器底部分离出来，然后将环氧丙烷和二氧化碳提供给上层超临界CO2相，使Rf3RPI保持在其中。
Polyfluoroalkyl phosphonium iodides, Rf3RPI (Rf = C4F9C2H4, C6F13C2H4, C8F17C2H4; R = Me, Rf), catalyzed propylene carbonate synthesis from propylene oxide and carbon dioxide under supercritical CO2 conditions, where propylene carbonate was spontaneously separated out of the supercritical CO2 phase. The Rf3RPI catalyst could be recycled with maintaining a high CO2 pressure and temperature by separating the propylene carbonate from the bottom of the reactor followed by supplying propylene oxide and CO2 to the upper supercritical CO2 phase in which the Rf3RPI remained.