Ligand-Modified Rhodium Catalysts on Porous Silica in the Continuous Gas-Phase Hydroformylation of Short-Chain Alkenes-Catalytic Reaction in Liquid-Supported Aldol Products

Journal article


Publication Details

Author(s): Schönweiz A, Debuschewitz J, Walter S, Woelfel R, Hahn H, Dyballa KM, Franke R, Haumann M, Wasserscheid P
Journal: ChemCatChem
Publisher: Wiley-VCH Verlag
Publication year: 2013
Volume: 5
Pages range: 2955-2963
ISSN: 1867-3880


Abstract


Ligand-modified Rh complexes were physically adsorbed on the surface of porous silica. The resulting materials were subjected to the continuous gas-phase hydroformylation of C-2 and C-4 alkenes. The ligands used for catalyst modification were bidentate phosphorus ligands known from the literature, namely, sulfoxantphos (1) and a benzopinacol-based bulky diphosphite 2. The tested catalyst materials were active and, in particular, selective as in comparable homogeneous liquid-phase experiments. Long-term stability experiments over 1000h on stream showed minor deactivation. A significant increase in the catalyst mass after the reaction was detected by weighing and thermogravimetric analysis. By using headspace-GC-MS, the mass increase could be attributed to high-boiling compounds, which are formed insitu during the catalytic reaction itself and accumulate inside the pores of the support. Evidence is given that the initially physisorbed catalyst complexes dissolve in the high-boiling aldol side-products, which are suitable solvents for the active catalyst species and provide a liquid-phase environment held by capillary forces on the support.



FAU Authors / FAU Editors

Debuschewitz, Jonas
Lehrstuhl für Chemische Reaktionstechnik
Haumann, Marco PD Dr.
Lehrstuhl für Chemische Reaktionstechnik
Schönweiz, Andreas
Lehrstuhl für Chemische Reaktionstechnik
Walter, Simon
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik
Woelfel, Rene
Lehrstuhl für Chemische Reaktionstechnik


External institutions with authors

Evonik Degussa GmbH


How to cite

APA:
Schönweiz, A., Debuschewitz, J., Walter, S., Woelfel, R., Hahn, H., Dyballa, K.M.,... Wasserscheid, P. (2013). Ligand-Modified Rhodium Catalysts on Porous Silica in the Continuous Gas-Phase Hydroformylation of Short-Chain Alkenes-Catalytic Reaction in Liquid-Supported Aldol Products. ChemCatChem, 5, 2955-2963. https://dx.doi.org/10.1002/cctc.201300305

MLA:
Schönweiz, Andreas, et al. "Ligand-Modified Rhodium Catalysts on Porous Silica in the Continuous Gas-Phase Hydroformylation of Short-Chain Alkenes-Catalytic Reaction in Liquid-Supported Aldol Products." ChemCatChem 5 (2013): 2955-2963.

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Last updated on 2018-25-08 at 07:11