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- W2029805003 abstract "The benzoylation of substituted arenes using benzoyl chloride has been investigated for Zn- and Fe- exchanged zeolites (H-ZSM-5, mordenite and zeolite Y). Toluene benzoylation preferentially gave 4-methylbenzophenone for all zeolites. The Zn-exchanged zeolites were more active than the proton forms of zeolites, but gave the same product selectivity, and it has been shown that extensive leaching of Zn2+ cations into solution occurs, particularly when zinc acetate is used to prepare the catalyst. For the Zn-exchanged zeolites it is concluded that a significant proportion of the reaction occurs in solution. However, Fe-exchanged zeolites gave only limited leaching of Fe cations into solution and in this case the cation-exchanged zeolite acts as a heterogeneous catalyst. The Fe-Na-Y has been shown to give high yields of substituted benzophenones for a range of substrates. The form of conversion/time curves is consistent with the existence of two types of catalytic site. One type appears to be inhibited by the product benzophenone and is responsible for the initial rapid rate of conversion. The other is not inhibited, giving rise to an approximately constant, slower reaction rate in the later stages." @default.
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- W2029805003 date "2001-10-01" @default.
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- W2029805003 title "Benzoylation of substituted arenes using Zn-and Fe-exchanged zeolites as catalysts" @default.
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- W2029805003 doi "https://doi.org/10.1016/s1381-1169(01)00164-9" @default.
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