【摘 要】
：
以sol gel法制备了MoO3 /SiO2 催化剂 ,并用BET比表面积测定 ,XRD和FT IR等手段对催化剂进行了表征 ;研究了以过氧化氢异丙苯为氧化剂的丙烯一步环氧化反应 ,考察了催化剂的
【机 构】
：
华东理工大学工业催化研究所,华东理工大学工业催化研究所,华东理工大学工业催化研究所,华东理工大学工业催化研究所,华东理工大学工业催化研究所 上海200237,上海200237,上海200237,上海2
论文部分内容阅读
以sol gel法制备了MoO3 /SiO2 催化剂 ,并用BET比表面积测定 ,XRD和FT IR等手段对催化剂进行了表征 ;研究了以过氧化氢异丙苯为氧化剂的丙烯一步环氧化反应 ,考察了催化剂的制备条件和反应条件对丙烯环氧化反应的影响 .结果表明 ,在制备过程中 ,酸性水解剂对MoO3 /SiO2 催化剂的分散度、比表面积和催化性能有较大的影响 .用HCl溶液作为水解剂制备的催化剂 ,其性能明显优于用HNO3 或HAc作水解剂制备的催化剂 .在 110℃和 0 6MPa的条件下反应 2h ,过氧化氢异丙苯转化率为 89% ,环氧丙烷选择性为 80 % .
The MoO3 / SiO2 catalysts were prepared by sol gel method. The catalysts were characterized by BET specific surface area, XRD and FT IR. The one-step epoxidation of propylene using cumene hydroperoxide as oxidant was investigated. Catalyst preparation conditions and reaction conditions on the epoxidation of propylene.The results show that in the preparation process, acid hydrolysis agent on the MoO3 / SiO2 catalyst dispersion, specific surface area and catalytic performance have a greater impact.Using HCl solution As a catalyst prepared by hydrolytic agent, its performance is obviously better than that prepared by using HNO3 or HAc as hydrolysis agent.On the condition of 110 ℃ and 0 6MPa for 2h, the conversion of cumene hydroperoxide is 89% Selectivity is 80%.
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