Studies on Chemical Fixation of CO2 and Syntheses of Alkylene Carbonates

Abstract

Abstract: Chemical fixation of CO₂ is a research hotspot in recent years. In this paper, it is reported that PcAlCl and quaternary ammonium(or quaternary phosphonium) halides, including n-BuPh₃PBr, n-Bu₄NBr, MePh₃PIor n-Bu₄NI, have strong synergetic catalytic effects on the cycloaddition of alkylene oxides and CO₂ for preparing alkylene carbonates. At the optimum temperature of 100 ℃, the binary system of n-BuPh₃PBr and PcAlCl has a catalytic activity of 360 mol/(mol·h) and 99% selectivity, while the catalytic activity of PcAlCl and n-BuPh₃PBr are only 57 mol/(mol·h) and 90 mol/(mol·h), respectively. It is suggested from the experimental results that 1:1 complex between PcAlCl and n-BuPh₃PBr may be formed, which is the main reason for synergetic strengthening of catalytic activity of PcAlCl and n-BuPh₃PBr.

Key words: CO₂, Chloroaluminum phthalocyanine, Quaternary ammonium salt, Quaternary phosphonium salt, Alkylene carbonate, Cycloaddition

CLC Number:

O643.32 TQ 42

TrendMD:

JI Dong-Feng, LU Xiao-Bing, HE Ren, ZHAN Xiao-Li, YANG Yong-Rong . Studies on Chemical Fixation of CO₂ and Syntheses of Alkylene Carbonates[J]. Chem. J. Chinese Universities, 2001, 22(10): 1720.

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Studies on Chemical Fixation of CO₂ and Syntheses of Alkylene Carbonates

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