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A new quatemary ammonium heteropolyoxotungstant (cat.C) is prepared andcharacterized. And the cat.C also is an reaction-controlled phase-transfer catalyst The catalyticsystem of O_2/EAHQ (2-ethylanthrahydroquinone)/cat.c is used for the epoxidation of propylene.Under the optimal conditions, the yield of propylene oxide based on EAHQ is 84.1%, theselectivity for propylene oxide based on propylene is 99.8% and the conversion of propylene basedon EAHQ is 84.3%. The cat.c precipitates after the epoxidation reaction for easy separation.The cat C is stable enough to be recycled three times without any loss in selectivity.
A new quatemary ammonium heteropolyoxotungstant (cat. C) is prepared and characterized. And the cat. C is is also an reaction-controlled phase-transfer catalyst The catalytics system of O 2 / EAHQ (2-ethylanthrahydroquinone) /cat.c is used for the epoxidation of propylene carbonate based on EAHQ is 84.1%, these selectivity for propylene oxide based on propylene is 99.8% and the conversion of propylene based on EAHQ is 84.3%. The cat.c precipitates after the epoxidation reaction for easy separation. cat C is stable enough to be recycled three times without any loss in selectivity.