空心钛硅分子筛在二甲基硫醚液相氧化反应中的催化性能

Catalytic Peformance of Hollow Titanosilicate Zeolite in Dimethyl Sulfide Liquid Phase Oxidation Reaction

在以过氧化氢为氧化剂的二甲基硫醚液相氧化反应体系中,对空心钛硅分子筛(HTS)的催化性能进行了系统研究,详细考察了催化剂存在与否以及催化剂用量、反应时间、反应物料配比及溶剂用量等不同反应条件变化对二甲基硫醚温和液相氧化反应的影响。研究发现,在温和反应条件下,HTS催化二甲基硫醚氧化反应中主要产物是二甲基亚砜和二甲基砜。经优化后,能够获得较好的氧化二甲基硫醚制备二甲基亚砜的反应效果,在二甲基硫醚转化率超过99%的情况下,二甲基亚砜选择性可达95%以上。

Catalytic peformance of hollow titanosilicate（HTS）in dimethyl sulfide（DMS）oxidation with hydrogen peroxide（H2O2）as oxidant in liquid phase under mild conditions was investigated.Different reaction conditions such as the absence/presence of catalyst,amount of catalyst,reaction time,mole ratio of reactants and amount of solvent were examined.Results show that dimethyl sulfoxide（DMSO）and dimethyl sulfone（methyl sulfonyl methane,MSM）are the major products.Under optimized conditions,HTS shows excellent catalytic performance in dimethyl sulfide mild oxidation reaction.When the conversion of DMS is above 99%,the selectivity of DMSO reaches more than 95%.