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- Title
Efficient Catalysts of Mixed Amino‐Functionalized Ionic Liquids and Zinc Halides for Cycloaddition of CO<sub>2</sub> to Propylene Oxide without Solvent.
- Authors
Shen, Weihua; Ju, Jixin; Nie, Yingying; Jiao, Linyu; Fang, Yunjin
- Abstract
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 CO2 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, CO2 pressure, and reaction time, with the catalysis of [Apbim]I, [Apbim]Cl/ZnBr2 (3:1), and [Apbim]Br/ZnBr2 (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/ZnBr2 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.
- Subjects
ZINC halides; PROPYLENE oxide; CATALYSTS; RING formation (Chemistry); MANUFACTURING processes; MIXED oxide catalysts; ZINC catalysts; IONIC liquids
- Publication
Chemical Engineering & Technology, 2021, Vol 44, Issue 8, p1528
- ISSN
0930-7516
- Publication type
Article
- DOI
10.1002/ceat.202100085