HYDROFORMYLATION CATALYSIS USING POLYMER-SUPPORTED MULTINUCLEAR RHODIUM CARBONYL CLUSTER CATALYSTS

A series of polymer-supported tetranuclear rhodium carbonyl cluster catalysts were prepared b the reaction of Rh_4(CO)_(12) with several kinds of polymer supports such as crosslinked poly (N-vinylpyrrolidone) (PNVP) and crosslinked poly ( styrene-co-maleic anhydride) (PMAn), and subsequently were used to catalyze the hydroformylation of olefins. The catalysts were characterized by IR, SEM and XPS. The influence of the supports structure and crosslinking, metal's content and particle size of the supports on the catalysts hydroformylation properties was studied. The factors which affect the catalytic conversion were also examined. The experimental results show that the polymer-supported Rh cluster catalysts possess very high catalytic activity and aldehyde selectivity as well as good reproducibility.     

聚合物载体上功能基配体对不同催化活性物种氢甲酰化催化性能的影响

作者用五类聚合物配体与不同催化活性物种反应制备了负载催化剂,并考察了聚合物配体及聚合物载体上功能基(配体)对不同催化活性物种氢甲酰化催化性能的影响。实验结果表明:当聚合物配体相同时,Co_2Rh_2(CO)_(12)双金属簇催化活性物种优于RhCl_3·3H_2O及Rh_2(Co)_4Cl_2;聚(N——乙烯基吡咯烷酮)(PNVP)及马来酸酐与苯乙烯共聚物(PMAn)负载催化剂大多具有良好的氢甲酰化催化性能。