Hydroformylation of propylene in supercritical CO2 + H2O and supercritical propylene + H2O |
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Authors: | Zhang Jingchang Wang Hongbin Liu Hongtao Cao Weiliang |
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Institution: | aInstitute of Modern Catalysis, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract: | Hydroformylation of propylene has been carried out in supercritical CO2 + H2O and in supercritical propylene + H2O mixtures using Rh(acac)(CO)2 and triphenylphosphine trisulfonate trisodium salt (TPPTS), P(m-C6H4SO3Na)3, as catalyst. Visual observation of the reaction mixtures indicates that in both systems a single phase is present at supercritical temperatures and pressures so that the reaction occurs under homogeneous conditions. After reaction is complete, a biphasic system is formed when the pressure and temperature are reduced to ambient. This facilitates separation of the products in the organic phase and the rhodium catalyst in the aqueous phase. The rhodium concentration in the organic phase was found to be negligible ( 1.0 × 10?6 mg/ml). Furthermore, compared with traditional hydroformylation technology, the supercritical reactions also show better activity and selectivity. |
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Keywords: | Supercritical reaction Supercritical CO2 + H2O Supercritical propylene + H2O Supercritical hydroformylation of propylene Rhodium catalyst TPPTS |
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