无机钛硅原料体系合成TS-1催化丙烯环氧化反应

Study on the Epoxidation of Propylene Catalyzed by TS-|1 Synthesized from Inorganic Titanosilicate System

研究了无机钛硅原料体系合成的 TS- 1催化丙烯环氧化的反应 ,并与经典法、修正法制得样品的催化性能进行了比较 .考察了搅拌、 Na2 CO3加入量、反应时间、反应温度、双氧水加量、催化剂量及溶剂等对丙烯环氧化反应的转化率、选择性等的影响 ,并初步探讨了无机钛硅原料合成的 TS- 1的再生性能 .结果表明 ,对于丙烯环氧化反应 ,无机钛硅原料合成 TS- 1样品与经典法和修正法制取样品的催化性能相当 ;反应条件对丙烯环氧化反应有较大影响 ;Na2 CO3的加入及加入量对产物选择性影响较大 ;溶剂效应明显 ,以甲醇为溶剂时 ,丙二醇和单甲醚是主要的副产物 .

The epoxidation of propylene catalyzed by TS\|1 synthesized from inorganic titanosilicate system was studied, and the catalytic performances of TS\|1 samples synthesized from inorganic titanosilicate system, by convention method and by the modified method were compared. Effects of stirring, amount of Na\-2CO\-3 solution, reaction time, reaction temperature, amounts of H\-2O\-2, amount of catalyst and solvent on the conversion of H\-2O\-2 and selectivity to propylene oxide were investigated. Regeneration of catalyst synthesized from inorganic titanosilicate system was also investigated. The experimental results show that three samples possess nearly the same high catalytic activity for the epoxidation of propylene. The epoxidation of propylene is greatly affected by reaction conditions: the addition of Na\-2CO\-3 solution and the amount added have significant effect on the selectivity of propylene oxide and the effect of solvent on epoxidation of propylene is also obvious. When methanol is used as the solvent, propylene glycol and its monomethyl ethers are the main by\|products.