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- W2080592532 abstract "Polysiloxanes containing sulfophenyl, sulfobenzyl, 2-(sulfophenyl)ethyl and 3-sulfopropyl groups were prepared by co-condensation of alkoxysilane and alkoxy- or chloro-organosilane. Their surface areas, pore size distributions and ion exchange capacities were examined. The ion exchange capacity and the elemental analysis for sulfur and carbon showed that the sulfonated polyorganosiloxanes (SPOS) have much higher acidities than the modified silica gel. The thermal and hydrothermal stabilities and catalytic activities for various acid-catalyzed reactions were studied. The thermal stabilities of the sulfonated polyphenylsiloxane and sulfonated polypropylsiloxane were much higher than that of Amberlyst-15. The catalytic activities of SPOS for the vapor phase dehydration of alcohols and the liquid phase esterification were almost the same as those of Amberlyst-15. For the vapor phase nitration of benzene, SPOS had excellent activities." @default.
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- W2080592532 date "1987-11-01" @default.
- W2080592532 modified "2023-10-17" @default.
- W2080592532 title "Preparation of sulfonated polyorganosiloxanes and their acid catalysis" @default.
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- W2080592532 doi "https://doi.org/10.1016/0304-5102(87)87020-7" @default.
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