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首页> 外文期刊>Journal of Catalysis >Highly efficient and selective production of epichlorohydrin through epoxidation of allyl chloride with hydrogen peroxide over Ti-MWW catalysts
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Highly efficient and selective production of epichlorohydrin through epoxidation of allyl chloride with hydrogen peroxide over Ti-MWW catalysts

机译：在Ti-MWW催化剂上通过过氧化氢将烯丙基氯与过氧化氢进行环氧化，高效，选择性地生产环氧氯丙烷

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The catalytic properties of Ti-MWW in the epoxidation of allyl chloride (ALC) with hydrogen peroxide to epichlorohydrin (ECH) were studied by comparing these properties with those of TS-1, Ti-MOR, and Ti-Beta. Issues concerning the stability and reuse of Ti-MWW were also considered. The investigation on various reaction parameters showed that Ti-MWW is an active and selective catalyst for ALC epoxidation. Ti-MWW prefers aprotic solvents, such as acetonitrile and acetone, over protic alcohols, which is favorable for suppressing the formation of solvolysis byproducts. ALC conversion and ECH selectivity were both as high as 99% on Ti-MWW. 3-Chloro-1,2-propanediol and other heavy byproducts with high boiling points had a negative effect on ALC conversion for both TS-1 and Ti-MWW. A novel secondary synthesis caused a structural rearrangement of the Ti-MWW framework and then improved its stability. (c) 2007 Elsevier Inc. All rights reserved.
机译：通过与TS-1，Ti-MOR和Ti-Beta进行比较，研究了Ti-MWW在烯丙基氯（ALC）与过氧化氢环氧化为环氧氯丙烷（ECH）的催化性能。还考虑了与Ti-MWW的稳定性和重复使用有关的问题。对各种反应参数的研究表明，Ti-MWW是ALC环氧化的活性和选择性催化剂。与质子醇相比，Ti-MWW更喜欢非质子传递溶剂，例如乙腈和丙酮，这对于抑制溶剂分解副产物的形成是有利的。 Ti-MWW的ALC转化率和ECH选择性均高达99％。对于TS-1和Ti-MWW，3-氯-1,2-丙二醇和其他高沸点重质副产物对ALC转化率都有负面影响。一种新颖的二次合成导致Ti-MWW框架的结构重排，然后提高了其稳定性。 （c）2007 Elsevier Inc.保留所有权利。

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