LIU Sheng^1,2, ZHANG Sheng-Jun¹, ZHAO Gong-Da¹, LI Jun^1*, AN Qing-Da², GAO Shuang^1*

(1 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023; 2 Department of Chemical Technology , Dalian Polytechnic University, Dalian, 116034)

Abstract: Epoxidation of allyl chloride without solvent catalyzed by reaction controlled phase transfer catalyst [(C₁₆H₃₃(70%)+C₁₈H₃₇(30%))N(CH₃)₃]₃[PW₄O₁₆] using H₂O₂ as oxidant was described. Under the optimized conditions (allyl chloride / H₂O₂/catalyst (molar ratio) =400:100:1, 50~55℃, 3h.) 85~87% yield of epichlorohydrin was obtained. The catalyst can be reused with good stability in the presence of NaH₂PO₄.The structure and the composition of the fresh catalyst and the recovered catalysts was investigated by 31P MAS NMR spectra.. The results demonstrated NaH₂PO₄ can keep the catalyst stable.

Key word: Allyl chloride, Reaction-controlled phase-transfer catalyst, hydrogen peroxide, epoxidation, epichlorohydrin

E-mail: sgao@dicp.ac.cn

Journal of Molecular Catalysis, Vol. 24, Issue 5, 2010, 387~391