The Preparation of Anchored Heterogenized Rhodium Phosphine Complex Catalyst and Its Catalytic Performances in Hydroformylation of 1-Hexene

A new anchored heterogenized rhodium carbonyl phosphino complex catalyst was prepared by the combination method of anchoring and sol-gel technique. The catalyst was characterized by FT-IR, XPS and ICP. The catalytic performances of the catalyst on hydroformylation of 1-hexene were studied and the optimized catalytic reaction conditions, which were the reaction temperature 100 ℃, pressure 5.0 MPa, reaction time 12h, and the catalyst loading amount 0.3382g (Rh 4.4 10 -5 mol) were obtained. When the reaction was run at the optimized conditions, the conversion of 1-hexene reached 98.5% with an aldehyde selectivity of 92.4% and n/i of 1.43. The recycle tests confirmed that the catalyst remained higher activity in the seventh run, which indicated the catalyst had good recyclablity. The results of XPS and ICP analysis demonstrated that the leaching of Rh was mainly due to the replacement of phosphino ligand by CO in the hydroformylation conditions.