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- W2349576753 abstract "The different loading catalysts of 12-tungstophosphoric acid/SiO2 were prepared by in-situ method.The structure and properties of the catalysts were characterized by FT-IR spectroscopy,X-ray diffraction.It was found that the catalyst containing 20% H3PW12O40by calcination at 200℃for 4hshowed a higher catalytic activity.The results show that the 12-tungstophoaphoric acid highly dispersed in hole of SiO2still keeps the Keggin structure,and has certain chemical interaction with surface hydroxy for SiO2.The catalytic properties of synthetic benzaldehyde 1,2-propanediol acetal show that H3PW12O40/SiO2catalyst have high catalytic activity.The optimum conditions are:molar ratio of benzaldehyde to 1,2-propylene was 1∶1.5,the mass ratio of the catalyst used to the reactants was 1.0%,the volume of cyclohexane as the water-carrying agent was 8mL,and the reaction time was 60min,the yield of its can reach 88.5%,and show excellent reusabity." @default.
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- W2349576753 date "2014-01-01" @default.
- W2349576753 modified "2023-09-23" @default.
- W2349576753 title "Preparation of 12-tungstophosphoric acid/SiO_2 catalyst by in-situ method and its catalytic performance" @default.
- W2349576753 hasPublicationYear "2014" @default.
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