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Hydroformylation of 1-hexene using polymer-supported rhodium catalysts in supercritical carbon dioxide

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Title: Hydroformylation of 1-hexene using polymer-supported rhodium catalysts in supercritical carbon dioxide
Authors: Fujita, Shin-Ichiro Browse this author →KAKEN DB
Akihara, Shuji Browse this author
Fujisawa, Shinya Browse this author
Arai, Masahiko Browse this author →KAKEN DB
Keywords: Hexene hydroformylation
Heterogeneous catalyst
Catalyst recycling
Supercritical carbon dioxide
Issue Date: 1-May-2007
Publisher: Elsevier B.V.
Journal Title: Journal of Molecular Catalysis A Chemical
Volume: 268
Issue: 1-2
Start Page: 244
End Page: 250
Publisher DOI: 10.1016/j.molcata.2006.12.032
Abstract: Hydroformylation of 1-hexene was carried out in supercritical CO2 (scCO2) and in organic solvents (toluene and ethyl acetate) using polymer-supported rhodium catalysts, which were prepared from polystyrene bound triphenylphosphine (TPP) and dicarbonylacetylecetonato rhodium. Preparation variables such as TPP/Rh ratio, time of rhodium precursor fixation on the support and time of syngas pretreatment do not produce significant effects on the reaction. The product distribution slightly changes with CO2 pressure. The conversion increases appreciably as H2 pressure is raised in scCO2 but CO retards the reaction. The influence of H2 pressure in scCO2 is slightly different from that in toluene. Changes of the structure of rhodium complexes on the polymer during the catalyst preparation and the reaction were investigated by diffuse reflectance FT-IR. It should be noted that the catalyst is recyclable for the reaction in scCO2 and that the reaction rate and selectivity of the hydroformylation are much higher than those in the organic solvents.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤田 進一郎

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