本文对固载聚乙二醇和固载季铵盐这两种三相相转移催化剂在扁桃酸合成中的催化作用进行了研究．研究结果表明，固载聚乙二醇和固载季铵盐对扁桃酸的合成均具有明显的催化效果．催化反应结束后，这两种催化剂还可以回收并加以重复使用，且重复使用性能良好 In this paper, the catalysis of immobilized polyethylene glycol and quaternary ammonium salt immobilized on the synthesis of mandelic acid was studied. The results showed that the immobilization of polyethylene glycol and quaternary ammonium salts on the synthesis of mandelic acid have obvious catalytic effect. After the end of the catalytic reaction, both catalysts can be recovered and reused, with good reusability