关键词: MnSAPO-34, 气相转移法（VPT）, 缩酮反应

Abstract: MnSAPO-34 molecular sieves were synthesized by vapor-phase transport (VPT) method using triethylamine (Et3N) as a structure directing agent (SDA), and were characterized by XRD, BET, SEM, UV-Vis and FT-IR and TG. The influence of the crystallization conditions and the dry-gel composition were investigated. The results showed the synthesis conditions had an effect on the crystalline phase. Pure MnSAPO-34 had been obtained when crystallized at 140 °C for 18 hours. The ratios of MnO/Al2O3 in the starting gel from 0.1 to 0.2 resulted in pure MnSAPO-34 with CHA topology. Beyond the scope, MnSAPO-5 with AFI topology structure was obtained as an impurity. UV-Vis spectroscopy and FT-IR indicated that manganese incorporated into the framework of the molecular sieve. The catalytic performance of MnSAPO-34 molecular sieve was tested by ketalation reaction of 1, 2-propanediol and cyclohexanone. High yield of cyclohexanone1, 2-propanediol ketal was obtained.

Key words: MnSAPO-34, Vapor-phase transport (VPT), Ketalization