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研究了P/Kh比对PPh3-Rh/SiO2催化剂上丙烯氢甲酰化反应性能的影响.结果表明,当P/Rh比为15时,丙烯氢甲酰化反应性能最好,丙烯转化率为25.9%,产物丁醛正异比为14,转换频率为241 h-1.PPh3-Rh/SiO2催化剂的固体31P核磁共振结果表明,在合成气气氛下,物理吸附的PPh3能够溢流到Rh/SiO2表面形成化学吸附的PPh3,从而促进了具有氢甲酰化活性的铑膦络合物的形成,Wilkinson催化平衡理论也很好地解释了本实验结果.

参考文献

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