Structure and Catalytic Activities of Magnesia Supported Molybdovanadophosphoric Acid Catalysts

Abstract

Abstract: MgO supported copper salts of molybdovanadophosphoric acid H₄PMo₁₁VO₄0 catalysts were prepared in alcohol by impregnation, and its catalytic activities for the reaction of n-hexanol conversion towards n-hexanal exhibit a higher selectivity(>93% in all case). Chemical nature and texture of MgO were not damaged in the alcohoLImpregnation solution. The measurements of IR, XRD, UV-DRS, NMR, DTA-TG and BET surface area showed that the copper salts of molybdovanadophosphoric acid monolayer dispersed on the surface of MgO and the Keggin type structure of the heteropoly acid salts only partly decomposed. It is observed that the Keggin type structure could be renewed after the catalytic reaction, and an activity phase was formed.

Key words: Structure, Catalytic activity, Magnesia, Molybdovanadophosphoric acid

CLC Number:

O643

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ZHOU Guang-Dong, CHENG Tie-Xin, ZHUANG Hong, LIU Yan, LI Wen-Xing, BI Ying-Li, ZHEN Kai-Ji . Structure and Catalytic Activities of Magnesia Supported Molybdovanadophosphoric Acid Catalysts[J]. Chem. J. Chinese Universities, 2003, 24(6): 1043.

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Structure and Catalytic Activities of Magnesia Supported Molybdovanadophosphoric Acid Catalysts

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