摘要
考察了反应温度、CO/H2 压力和 P/Rh比等因素 ,对 Rh/Ph3PO催化剂催化混合辛烯氢甲酰化反应活性的影响 ,优化出最佳反应条件 .并采用加热加压的原位红外表征方法 ,跟踪了在 1 -辛烯反应中 Rh/Ph3PO催化剂的活化、中间活性物种的产生和分解消失等瞬态变化情况 .实验结果表明 ,Rh/Ph3PO体系对产物异壬醛的收率明显优于 Rh/Ph3P催化剂 ;原位红外表征结果表明 ,催化反应活性物种 HRh( CO) x( Ph3PO) 4 - x( x=1～ 3)的产生、浓度以及其动态稳定性 ,是影响 Rh/Ph3PO催化剂反应性能的重要原因 ,并对 Rh/Ph3PO催化剂体系的辛烯氢甲酰化反应活性优于 Rh/Ph3P体系的原因进行了探讨 .
Hydroformylation of mixed octenes over Rh/Ph 3PO catalyst was investigated in terms of reaction temperature, pressure of syngas and molar ratio of P/Rh to give the optimal reaction conditions for the yield of iso nonyl aldehydes (INA). Using an in situ infrared spectrometer, the activation of Rh/Ph 3PO and the formation (or decomposition) of catalytic species under the appointed temperatures were recorded. The obtained results indicate that the catalytic activity of Rh/Ph 3PO for the conversion of mixed octenes to INA is much higher than that of Rh/Ph 3P system, IR spectra show that the formation, concentration and stability of catalytic species of HRh(CO) x (Ph 3PO) 4 x ( x =1~3) affect the activities of Rh/P catalysts greatly, leading to the differences between the catalytic behaviors of Rh/Ph 3PO and Rh/Ph 3P systems.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2000年第3期227-231,共5页
Journal of Molecular Catalysis(China)
关键词
辛烯
铑催化剂
氢甲酰化
原位红外
Octenes
Rhodium complex catalyst
Triphenylphosphine oxide
Hydroformylation
In situ infrared characterization
