Influence of Phosphine Concentration on Propylene Hydroformylation over the PPh3-Rh/SiO2 Catalyst

doi:10.1016/S1872-2067(10)60156-8

Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (1): 31-35.DOI: 10.1016/S1872-2067(10)60156-8

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Influence of Phosphine Concentration on Propylene Hydroformylation over the PPh₃-Rh/SiO₂ Catalyst

YAN Li1,2, DING Yunjie1,2,*, LIU Jia1,2, ZHU Hejun1,2, LIN Liwu1,2

1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received:2010-09-17 Revised:2010-11-09 Online:2011-01-13 Published:2014-05-22

Abstract

Abstract: The effect of triphenyl phosphine concentration in the novel PPh₃-Rh/SiO₂ catalyst for propylene hydroformylation was studied and found an optimum P/Rh ratio of 15, a butyraldehyde n#/em/em# ratio of 14, a butyraldehyde TOF of 241 h^-1, and high catalytic stability for PPh₃-Rh/SiO₂. Solid-state ³¹P NMR shows that in an atmosphere of syngas the physically adsorbed PPh₃ migrates onto the surface of Rh/SiO₂ where it chemically adsorbs and then promotes the in situ formation of carbonyl phosphine complexes.

Key words: triphenyl phosphine, rhodium, silica, phosphine/rhodium ratio, propylene, hydroformylation, nuclear magnetic resonance

YAN Li1,2, DING Yunjie1,2,*, LIU Jia1,2, ZHU Hejun1,2, LIN Liwu1,2. Influence of Phosphine Concentration on Propylene Hydroformylation over the PPh₃-Rh/SiO₂ Catalyst[J]. Chinese Journal of Catalysis, 2011, 32(1): 31-35.

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Influence of Phosphine Concentration on Propylene Hydroformylation over the PPh₃-Rh/SiO₂ Catalyst

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