Comparison of Pentan-3-one formation with propionaldehyde formation during ethylene hydroformylation over Rh/active carbon catalyst
The rhodium supported on active carbon has been found to be active for pentan-3-one formation from C 2H 4, CO, and H 2, as well as propionaldehyde formation. Among three Rh/active carbon catalysts prepared from different kinds of rhodium compounds (RhCl 3, Rh(NO 3) 3, and Rh(CH 3COO) 3), one prepare...
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Veröffentlicht in: | Journal of catalysis 1992-08, Vol.136 (2), p.531-538 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The rhodium supported on active carbon has been found to be active for pentan-3-one formation from C
2H
4, CO, and H
2, as well as propionaldehyde formation. Among three Rh/active carbon catalysts prepared from different kinds of rhodium compounds (RhCl
3, Rh(NO
3)
3, and Rh(CH
3COO)
3), one prepared from RhCl
3 showed the highest activity for pentan-3-one formation. Comparing pentan-3-one formation with propionaldehyde formation, the effects of the following factors on the catalytic activity were observed to be different in both reactions; (i) effects of reaction temperature, (ii) effects on H
2 pretreatment of catalysts, and (iii) effects of partial pressure of CO. On pentan-3-one formation,
13C
2H
5CO
13C
2H
5 and C
2H
5
13COC
2H
5 were found to be the predominant products in the reaction of propionaldehyde-
13C
2H
4-CO-H
2 and of propionaldehyde-C
2H
4-
13CO-H
2, respectively. These results indicate that the route for pentan-3-one formation is the reaction among two molecules of C
2H
4 and each one molecule of CO and H
2, and not the reaction between C
2H
4 and propionaldehyde. |
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ISSN: | 0021-9517 1090-2694 |
DOI: | 10.1016/0021-9517(92)90083-T |