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

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Details zur Publikation

Autor(en): Schönweiz A, Debuschewitz J, Walter S, Woelfel R, Hahn H, Dyballa KM, Franke R, Haumann M, Wasserscheid P
Zeitschrift: ChemCatChem
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2013
Band: 5
Seitenbereich: 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-Autoren / FAU-Herausgeber

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


Autor(en) der externen Einrichtung(en)
Evonik Degussa GmbH


Zitierweisen

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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Zuletzt aktualisiert 2018-25-08 um 07:11