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Selective hydrogenation of trans-4-phenyl-3-butene-2-one to unsaturated alcohol over Ru/γ-Al2O3 modified by PPh3 and diamines

Paper ID Volume ID Publish Year Pages File Format Full-Text
43284 45961 2008 6 PDF Available
Title
Selective hydrogenation of trans-4-phenyl-3-butene-2-one to unsaturated alcohol over Ru/γ-Al2O3 modified by PPh3 and diamines
Abstract

The selective hydrogenation of trans-4-phenyl-3-butene-2-one over Ru/γ-Al2O3 stabilized with triphenylphosphine was investigated in the presence of diamine and base. It was found that 1,2-diphenylethylene-1,2-diamine (DPEN) was the best modifier among the investigated diamines. Both DPEN and KOH not only promoted the selectivity of the CO bond hydrogenation, but also accelerated the rate of the hydrogenation. Under the optimum conditions: the reaction temperature of 35 °C, H2 pressure of 4.0 MPa, KOH concentration of 0.04 mol/l, and reaction time of 3 h, the conversion of trans-4-phenyl-3-butene-2-one was close to 100% and the selectivity to unsaturated alcohol was more than 99%. In combining with the effect of reaction factors on the hydrogenation, a possible hydrogenation mechanism is proposed.

Graphical abstractCatalyst Ru/γ-Al2O3, which modified by triphenylphosphine and aliphatic and cycloaliphatic diamines, showed a highly catalytic activity and selectivity for the hydrogenation of CO double bond of trans-4-phenyl-3-butene-2-one. The conversion and selectivity of trans-4-phenyl-3-butene-2-one was up to 99% under the optimum reaction conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ruthenium; Diamine; Selective hydrogenation; Trans-4-phenyl-3-butene-2-one
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Selective hydrogenation of trans-4-phenyl-3-butene-2-one to unsaturated alcohol over Ru/γ-Al2O3 modified by PPh3 and diamines
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 339, Issue 1, 15 April 2008, Pages 93–98
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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