研究了合成苹果酯 -B过程中的无机盐类固体酸的催化活性。通过考察酸种类、用量对转化率、选择性的影响 ,选出两种盐类 :Al2 (SO4 ) 3·18H2 O ,以Mn +计用量 2 .5 %～4.4% (摩尔比 )时 ,反应 1～ 1.5h ,苹果酯 -B的产率达 94%以上 ;当CuCl2 ·2H2 O用量仅为 0 .9% ,同样反应时间 ,苹果酯-B的产率达 99%以上。通过中毒实验得出Lewis酸和Bronsted酸均为催化活性中心。另外 ,还讨论了 72℃下的平衡转化程度 The catalytic activity of inorganic salts of solid acids in the synthesis of apple ester B was studied. By examining the influence of acid type and dosage on the conversion and selectivity, two kinds of salts were selected: Al 2 (SO 4) 3 .18H 2 O, when the amount of Mn 2+ was between 2.5% and 4.4% (molar ratio) 1 ~ 1.5h, the yield of malic ester-B was more than 94%. When the amount of CuCl2 · 2H2O was only 0.9%, the yield of apple-ester B was over 99% in the same reaction time. Through the poisoning experiments, Lewis acid and Bronsted acid are all catalytic active centers. In addition, the degree of equilibrium conversion at 72 ° C was also discussed