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将有机卤素季铵盐以硅烷化键合方式嫁接到钛硅分子筛上,制备了兼备催化氧化烯烃合成环氧化物和环氧化物碳酸酯化反应的新型双功能催化剂,考察了其在丙烯、过氧化氢和二氧化碳一步合成碳酸丙烯酯的催化性能.研究表明,具有大外表面积的层剥离的钛硅分子筛是一种嫁接季铵盐合适的载体,丙基三丁基卤化铵是酯化催化性能优良的功能化基团,两者的偶合使一步法催化丙烯环氧化酯化合成碳酸丙烯酯的收率达48%.该催化剂具有较好的稳定性和重复使用性能.
The organohalogen quaternary ammonium salt was silanated onto the titanosilicate molecular sieve to prepare a novel dual-function catalyst with both the catalytic oxidation of olefins to the epoxidation of epoxides and the carbonation of epoxides. Hydrogen Peroxide and Carbon Dioxide Synthesis of Propylene Carbonate Catalyzed by a One-Step Process It has been shown that a titanosilicate molecular sieve with a large external surface area is a suitable carrier for grafted quaternary ammonium salts. Propyltributyl ammonium halide is an esterification catalyst Excellent functional group, the coupling between them makes the yield of propylene carbonate esterified to propylene carbonate by one-step method up to 48% .This catalyst has good stability and reusability.