有机硅聚合物负载的过渡金属络合催化剂的研究——Ⅶ.载体对催化剂活性的影响

有机硅聚合物负载的过渡金属络合催化剂的研究——Ⅶ.载体对催化剂活性的影响 STUDIES OF SILICON-SUPPORTED TRANSITION METAL COMPLEX CATALYSTS Ⅶ. Influence of supports on catalyst activity 刘基万 first-author 龚建春 肖超勃 游江 陈远荫 本文报导了聚γ—（m—二苯膦苯基）丙基硅氧烷钯络合物、聚ω—二苯膦十一烷基硅氧烷钯络合物分别固载于二氧化硅、氧化铝以及硅镁型吸附剂上所得到的六种催化剂,并研究了这些催化剂中的无机载体、有机载体及金属络合物在氢化中对催化剂活性的影响。实验结果表明,有机载体相同,不同的无机载体对催化剂影响的活性顺序为:硅镁型吸附剂>氧化铝>二氧化硅。无机载体相同,则以γ—（m—二苯膦苯基）丙基硅氧烷为有机载体的催化剂的活性大于以ω—二苯膦十一烷基硅氧烷为有机载体的催化剂。同时,金属络合物对催化剂活性的影响,在实验范围内,磷钯比越小,催化活性越高。 Six catalysts have been obtained from the poly-γ-（m-diphenylphosphinophenyl）propylsiloxane-palladium complex or poly-γ-diphenylphosphinoundecylsiloxane-palladium complex on Si-Mg absorbent, alumina and silica. The influence of inorgatic and organic supports as well as metal complex on catalyst activity for olefin hydrogenation has also been studied. The experimental results showed that the three polymer-bound palladium complexes supported on different inorganic supports all showed very high activity, their relative actiivity can be arranged in following sequence: Si-Mg a bsorbent, Al 2 O 3 , SiO 2 . If inorganic support is Si-Mg absorbent and oeganic supports are different, it is quite evident that the activity of catalyst preparing from γ-（m-dipheny-lphosphinophenyl）propylsiloxane is higher than that of catalyst preparing from γ-diphenylphosphinoundecylsiloxane by using the same substrate and under the same conditions The activity of catalyst decreased with increasing P/Pd ratio. 中国科学院科学基金 1986-02-01 2021-04-01 2