hyde up to 89.85%.Therefore,in the reaction of butyraldehyde glycol acetal,we choose the load of 20% of modified attapulgite load heteropoly acid catalyst( 20% APTES HPW/Pa ). (4)Th e catalytic synthesis of heteropolyacids The catalytic property of APTES HPW/Pa was evaluated in the synthesis of Butyraldehyde glycol acetal by N -butyl aldehyde with Ethylene glycol.The optimized condition are as follows :the amount of APTES HPW/Pa is 0.5wt.%,the molar ratio of aldehyde and alcohol is 1:1.5,the reaction temperature is 130 ℃, the reacti o min,the carrier cyclohexane is 10 ml,90.15% conversion of N -butyl aldehyde and the selectivity remained above 99.0% during the whole reac tion process. Keywords: Preyssler -structured heteropolyacid; load; attapulgite; Acetal reaction iv 万方数据
全文预览
