Research progress in application of rhodium-based non-homogeneous catalysts in olefin hydroformylation reaction
Olefin hydroformylation reaction is an important process for the synthesis of aldehydes in industry.The cost of hydroformylation of olefin is greatly increased due to the difficulty of recovery of rhodium-based homogeneous catalyst.Multiphase catalysts loaded with solid phase are widely concerned because of their simple separation and recycling operation,but there are problems of poor reactivity,large metal loss and high cost of catalyst preparation,developing non-homogeneous rhodium catalysts with good catalytic and recovery performance have broad prospects.The research progress in multiphase loaded rhodium-based catalysts for olefin hydro formylation reactions was reviewed in four types of catalysts:inorganic solid carrier immobilized catalysts,HRh(CO)(PPh3)3 encapsulated multiphase catalysts,porous organic ligand(POL)material supported catalysts and single-atom intermetallic nano-catalysts.In multiphase loaded rhodium-based catalysts,the composition and preparation conditions of phosphine ligand,the types and properties of carriers,and the synergistic effect of rhodium with other metals can all affect their catalytic performance in olefin hydroformylation reaction.The advantages,disadvantages and development prospects of these four types of catalysts were briefly analyzed.In future studies,it is suggested to design phosphine ligands with strong electron-feeding ability and high spatial site resistance,explore inorganic/organic carriers with high specific surface area and multi-level pore structure,deeply explore the interactions between metal nanoparticles,and further improve the catalytic performance and recovery performance of rhodium-based catalysts in olefin hydroformylation reaction.
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