SBA-15-based heterogeneous catalysts were applied to 1-octene hydroformylation. The turn over frequency over SBA-15/?-aminopropylmethyldimethoxysilane(AEAPMDMS)/Rh catalyst with triphenylphosphine (TPP) ligand prepared by conventional post grafting method was higher than that of the homogeneous catalyst, (Rh(CH3COO)2)2 with TPP. The SBA-15/AEAPMDMS/Rh catalyst can be easily recycled without rhodium loss. The molar ratio of linear to branched nonyl aldehydes was remarkably enhanced over the heterogeneous catalysts. The selectively functionalized rhodium catalyst (SBA-15/Ph2Si(OEt)2/AEAPMDMS/Rh), in which rhodium was selectively tethered intra-pore of SBA-15, was beneficial for improving the selectivity to linear aldehyde. In situ high pressure FT-IR analysis suggested HRh(CO)2(PPh3)2 and HRh(CO)(PPh3)3 to be active species over the SBA-15/AEAPMDMS/Rh catalyst with TPP.
Revised: May 19, 2011 |
Published: April 30, 2011
Citation
Song K., J. Baek, J.A. Bae, J. Yim, Y. Ko, D. Kim, and Y. Park, et al. 2011.Octene hydroformylation by using rhodium complexes tethered onto selectively functionalized mesoporous silica and in-situ high pressure IR study.Catalysis Today 164, no. 1:561-565.PNNL-SA-76977.