CATALYTIC SYSTEM AND METHOD FOR PREPARING ETHYLENE CARBONATE DERIVATIVE BY REACTION OF CARBON DIOXIDE AND ETHYLENE OXIDE DERIVATIVE UNDER EXTREMELY MILD CONDITIONS

摘要

An imidazole ionic liquid-ZnX2/base catalytic system and a method for catalytic preparation of an ethylene carbonate derivative with same. The catalytic system is composed of three ingredients, an imidazole ionic liquid, ZnX2 and a base and can catalyze a cycloaddition reaction of carbon dioxide and an ethylene oxide derivative under conditions of 0.5-1 atm., 15°C-35°C and a green solvent. The amounts of ZnX2 and the base are both 0.5%-5% of the molar amount of the ethylene oxide derivative, and the amount of the imidazole ionic liquid is 1-3 times the molar amount of the ethylene oxide derivative. The synthetic method has the characteristics of strictly mild reaction conditions, high catalytic activity, a single product, a high reaction yield, a reusable catalyst, a simple product purification operation and the like.