Silica-supported heteropolyacids as catalysts in alcohol dehydration reactions
作者： P Vázquez , L Pizzio , C Cáceres , M Blanco , H Thomas
DOI: 10.1016/S1381-1169(00)00346-0
关键词: Dehydration 、 Ethanol 、 Alcohol 、 Chemistry 、 Organic chemistry 、 X-ray crystallography 、 Fine chemical 、 Infrared spectroscopy 、 Catalysis 、 Keggin structure
摘要: Catalysts based on Keggin-type heteropolyacids supported silica were prepared for their use in dehydration of alcohols liquid phase. Species present the catalysts characterized by diverse physicochemical techniques, disclosing that both molybdophosphoric and tungstophosphoric acids are found with primary Keggin structure intact. Their catalytic behavior was studied alcohol interest production intermediary compounds fine chemical industries. Specifically, 1,2-diphenylethanol, 1-(3,4-dimethoxyphenyl)-2-phenylethanol cholesterol studied. It obtained a process direct cholesterol. very active selective, also allowing an easy separation from reaction medium. The same used several times without appreciable loss activity after they showed properties similar to those original catalysts.
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