磺化聚苯乙烯大孔树脂催化醛、酮与乙二醇缩合

合成了交换量不同的磺化聚苯乙烯大孔树脂,并将其运用于催化环已酮与乙二醇、苯甲醛与乙二醇的缩合反应。实验表明,磺化聚苯乙烯大孔树脂对醛、酮与乙二醇的缩合反应的催化效果良好,在0.2mol酮(或醛)中加入0.1g树脂,催化环己酮与乙二醇缩合反应的产率最高可达98.2%,催化苯甲醛与乙二醇缩合反应的产率可达73.3%。同时还发现磺化聚苯乙烯大孔树脂的交换量与催化合成缩酮、缩醛的产率有关,交换量为1.00mmol/g时其产率最高,催化性能较稳定。交换量小和交换量太大的树脂催化产率低。该树脂可以重复使用。催化反应完成后,树脂与反应液的分离十分方便,且催化剂对环境没有污染。

Effect of Sulphuric Macroporous Polystyrene Resin on The Catalyzing Synthesis of Cyclohexanone Glycol Ketal and Benzaldehyde Glycol Acetal

The sulphuric macroporous polystyrene resins with different exchange capacity were synthesized. The resins were used to catalyzing synthesis of cyclohexanone glycol ketal and benzaldehyde glycol acetal. The results indicated that cyclohexanone glycol ketal and glycol acetal were catalyzed by these resins. The yields of 98.2% and 78.7% were obtained under the reaction condition of 0.2 mol cyclohexanone (benzaldehyde) containing 0.1 g resin. The results also showed that when the resin having exchange capacity of 1.00 mmol/g was used, the catalyzing synthesis had highest yield and preferably steady catalyzing characteristic.