【摘要】 用Al2 (SO4 ) 3·18H2 O作催化剂催化苯甲醛与 1,2 -丙二醇的缩醛化 .通过实验研究 ,得出该反应的最适宜反应条件 :醇醛摩尔比为 0 .1∶0 .0 5 ,反应温度 94～ 10 0℃ ,Al2 (SO4 ) 3·18H2 O 0 .6 0g (12 g/mol) ,环已烷 10mL ,反应时间 2 .5h ,苯甲醛 - 1,2 -丙二醇缩醛产率可达 98.6 % .本法具有操作方便 ,反应温和 ,产品纯度高的优点更多还原

【Abstract】 The acetalization of benzaldehyde with 1,2 propanediol by using aluminum sulfate as catalyst is studied. The optimal conditions are obtained by experiments. The yield of the acetal reaches 98.6% when the mole ratio of propanediol to benzaldehyde is 0.1∶0.05, the temperature is 94～100*!℃, the amount of Al 2(SO 4) 3·18H 2O is 12*!g/mol, the amount of cyclohexanne is 10 ml, and the reaction time is 2.5*!h. This method takes the advantages of simple operation, mild reaction conditions, and high purity and yield of the product.更多还原