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  • Author or Editor: Wenyuan Qiu x
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Abstract

Mesoporous silica KIT-1 supported with active polytungstophosphate anion of PW x O y species was synthesized and successfully used to catalyze the alkene epoxidation in the environmentally benign solvent of ethyl acetate. The immobilized catalyst of KIT-N+-PW x O y was stable and robust for the epoxidation. In addition, the active species of PW x O y , the molecular sieve support of KIT-1 and the immobilized catalyst of KIT-N+-PW x O y were characterized by FT-IR, UV–vis, XRD, 31P MAS NMR, SEM, N2 adsorption/desorption, ICP and XPS in detail.

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Abstract

A facile and reusable catalytic system for alcohol oxidation with hydrogen peroxide was designed based on a temperature-responsive catalyst. Several kinds of alcohols were efficiently oxidized in high yields under relatively mild conditions. The catalyst could be easily recovered and reused.

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Abstract

A novel temperature-controlled phase transfer catalytic system based on [(C18H37)2(CH3)2N]7[PW11O39] for olefin epoxidation was demonstrated. The reaction was conducted in a non-chlorinated solvent of ethyl acetate with hydrogen peroxide. The catalyst was easily recovered and reused even ten cycles without loss in activity and selectivity.

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