噻唑-蒙脱土负载催化剂制备1,3-二羟基丙酮

Synthesis of 1,3-Dihydroxyacetone by Thiazolium-Montmorillonite clay catalyst

摘要:

将不同种类的噻唑盐化合物负载于钠基蒙脱土（Na+-MMT）上，制备出一系列噻唑-蒙脱土负载催化剂，将其用于选择性催化甲醛聚糖反应合成1,3-二羟基丙酮。通过FTIR、XRD、SEM对噻唑-蒙脱土催化剂的结构和形态进行了表征。测试了催化剂选择性催化甲醛聚糖反应的活性，考察了反应时间、温度、催化剂种类、催化剂用量等对1,3-二羟基丙酮产率的影响，结果表明：甲醛量30 mmol，噻唑-蒙脱土负载催化剂1.35 g，温度120 ℃，反应时间30 min， 1,3-二羟基丙酮的收率达62.3%。N2和空气氛围对于负载噻唑-蒙脱土催化剂催化甲醛聚糖生成DHA的活性影响不大，催化剂循环使用3次，仍具有良好催化活性。

Abstract:

In this work, nanoporous sodium montmorillonite clay (Na+-MMT) was used as a support for the immobilization of various thiazolium salts. The composite catalyst was used for preparation of 1,3-dihydroxyacetone in the formose reaction. The structure and morphology of the thiazolium-MMT was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The catalytic performance of this immobilized thiazolium salts were probed for the formose reaction. The effects of reaction time, reaction temperature, different catalysts, and the amount of composite catalyst on the yield of dihydroxyacetone were investigated. The optimized procedure as follows: the consumption of formaldehyde is 30 mmol, thiazolium- MMT catalyst is 1.35 g, at 120 ℃ reaction 30 min, the yield of DHA is 62.3%. Also, this catalyst can be reused three times with satisfied catalytic activity.