阳离子表面活性剂结构对两相体系长链烯烃氢甲酰化反应的影响

Effent of cationic surfactant structure on high olefin hydroformylation in aqueous two-phase catalytic system.

合成了四种季铵盐型阳离子表面活性剂,C16H33N(N2H5)3Br(十六烷基三乙基溴化铵),C16H33N(CH3)2C12H25Br(十六烷基十二烷基二甲基溴化铵),C22H45N(CH3)3I(二十二烷基三甲基碘化铵)和C22H45N(CH3)2C16H33Br(二十二烷基十六烷基二甲基溴化铵),考察其在水 有机两相体系中对Rh TPPTS催化的长链烯烃氢甲酰化反应的促进作用。结果表明,表面活性剂中疏水长链和阳离子头的变化对催化性能有重要影响,疏水长链的增长和疏水长链数目的增加、小的阳离子头均有利于加快催化反应的速度,而疏水长链对催化活性的影响更为显著。

The four cationic surfactants,C16H33N(C2H5)3Br(1),C16H33N(CH3)2C12H25Br(2),C22H45N(CH3)2C16H33Br(3),C22H45N(CH3)3I(4),were synthezed,and their effect on 1dodecene hydroformylation catalyzed by RhTPPTS was investigated in aqueous twophase catalytic system.The results indicated that longer lipophilic chain and smaller cationic group of surfactant were favored to accelerate the reaction rate of the hydroformylation,but the role of lipophilic chain was more significant.