新型膦氮铑配合物的1-己烯氢甲酰化

HYDROFORMYLATION OF 1-HEXENE BY NOVEL IMINOPHOSPHINE RHODIUM COMPLEXES

采用还原胺化法合成了新型膦氮配体铑配合物,并采用FT-IR和NMR(1H,13C,31P)进行结构表征。考察了水含量对膦氮配体铑配合物催化1-己烯氢甲酰化反应的影响,以及各种酸处理对催化剂循环使用的效果。结果表明,适量的水可提高膦氮配体铑配合物对1-己烯氢甲酰化反应的催化活性和选择性。反应后的膦氮配体铑配合物催化剂用适当有机酸萃取进入水相与产物分离,然后改变pH值使其从水相再进入新鲜有机溶剂中,实现催化剂在催化高碳烯烃氢甲酰化反应中的循环使用。

Novel iminophosphine ligands（P-N ligands） were synthesized and characterized by IR and NMR（1H,13C,31P）.The effect of water content on 1-hexene hydroformylation catalyzed by P-N ligand-Rh complexes was investigated,at the same time,the recycling of the catalysts based on these iminophosphines was examined.The results revealed that the addition of certain amount of water into 1-hexene hydroformylation system,the catalytic activity and selectivity of P-N ligand-Rh complexes could be enhanced.After 1-hexene hydroformylation,the catalyst was extracted by organic acid into water and back extracted into fresh organic solvent by setting the pH of the aqueous phase to the point at which the complex was no longer water-soluble to realize its recycling.