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Efficient Catalysts of Mixed Amino‐Functionalized Ionic Liquids and Zinc Halides for Cycloaddition of CO 2 to Propylene Oxide without Solvent
Author(s) -
Shen Weihua,
Ju Jixin,
Nie Yingying,
Jiao Linyu,
Fang Yunjin
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202100085
Subject(s) - catalysis , chemistry , propylene carbonate , ionic liquid , propylene oxide , halide , cycloaddition , inorganic chemistry , zinc , selectivity , solvent , yield (engineering) , organic chemistry , materials science , electrolyte , polymer , ethylene oxide , electrode , copolymer , metallurgy
Amino‐functionalized halide ionic liquids, aminopropyl‐3‐butyl‐imidazolium ([Apbim] + ) with different halogen anions, and their zinc halide mixing catalysts were prepared and used to catalyze the cycloaddition of CO 2 to propylene oxide (PO) without solvent. Under ideal conditions, the conversion of PO could reach 93.5 % with the catalysis of [Apbim]Cl. Under optimized conditions of catalyst dosage, reaction temperature, CO 2 pressure, and reaction time, with the catalysis of [Apbim]I, [Apbim]Cl/ZnBr 2 (3:1), and [Apbim]Br/ZnBr 2 (5:1), the conversion of PO and the selectivity of propylene carbonate (PC) both reach > 99 %. From the point of view of preparation process and industrial operation, [Apbim]Cl/ZnBr 2 is the most suitable catalyst. This catalyst is characterized by good reusability and catalytic activity, and the yield of PC is about 99 % at least for ten times repeated use.