Novel mono-and bi-functional phosphonium salts deriving from toxic phosphine off-gas as efficient catalysts for chemical fixation of CO2
Novel mono-and bi-functional phosphonium salts deriving from toxic phosphine off-gas as efficient catalysts for chemical fixation of CO2
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DOI：
10.1016/j.jiec.2020.07.001
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发表时间：
2020-10-25
影响因子：
6.1
通讯作者：
Liu, Cheng-Mei
中科院分区：
文献类型：
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作者：
Dong, Ju-Ping;Zhao, Chen;Liu, Cheng-Mei
以磷化氢（PH3）尾气为起始原料，通过可持续的制备路线制备了一系列新型单官能团和双官能团磷化合物(P+（CH2CH2CN)(3) RX， X= Br， I）。新制备的卤化磷具有较高的热稳定性，其降解温度远高于CO2化学固定的温度。单功能磷盐与ZnBr2结合形成了一个高效的Lewis酸/碱型催化体系，单功能磷盐具有相同的催化效果。考察了温度、CO2压力、催化体系组成对CO2与环氧化物偶联反应的影响，评价了催化性能。结果表明，在120℃、1.5MPa CO2压力、无溶剂条件下，ZnBr2/P+CH2 CH2CN)(3)C4H9Br（摩尔比= 1:10）存在时，循环碳酸盐收率可达96.7%，而双官能型磷盐Br-P+(CH2CH2CN)(3)C2H4COOH单独存在时，表现出更好的催化性能。(C) 2020韩国工业与工程化学学会。Elsevier B.V.版权所有。
Utilizing phosphine (PH3) tail gas as starting feedstock, a series of novel mono-and bifucntional phosphonium compounds (P+(CH2CH2CN)(3) RX , X= Br, I) was prepaed by a sustainable preparation route. The newly prepared phosphonium halides show high thermal stability and their degradation temperature are far higher than that of CO2 chemical fixation. The mono-fucntional phosphonium salts combinate with ZnBr2 to form an efficient Lewis acid/base type catalytic system for CO2 chemical fixation and the bifucntional phosphonium salts alone shows same catalytic effects. The effects of temperature, CO2 pressure, composition of the catalytic system on coupling reaction of CO2 with epoxides are investigated to evaluate the catalytic performance. The results illustrate that 96.7% cyclic Carbonate yield can be obtained in presence of ZnBr2/P+CH2 CH2CN)(3)C4H9Br (molar ratio = 1:10) under 120 degrees C, 1.5MPa of CO2 pressure in solvent-free condition, menawhile bifuntional phiospohonium salt Br-P+(CH2CH2CN)(3)C2H4COOH alone shows better catalytic perofromance. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.