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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 30, 2012
Accepted November 1, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Selective hydrogenation of 4-isobutylacetophenone over a sodium-promoted Pd/C catalyst

Hong-Baek Cho Bae Uk Lee¹ Chung-Han Ryu² Tadachika Nakayama Yeung-Ho Park^1†

Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka 940-2188, Japan ¹Division of Materials and Chemical Engineering, Hanyang University, 1271, Sa-3dong, Sangnok-gu, Ansan, Gyeonggi-do 425-791, Korea ²Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 335, Gwahang-ro, Yuseoung-gu, Daejeon 305-701, Korea

Korean Journal of Chemical Engineering, February 2013, 30(2), 306-313(8), 10.1007/s11814-012-0184-z

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Abstract

The effect of sodium promotion on the selective hydrogenation of 4-isobutylacetophenone, 4-IBAP, was investigated over a Pd/C catalyst. A precipitation and deposition method was used to prepare the catalyst, and sodium was promoted on the Pd/C catalyst via post-impregnation while varying the sodium content. The sodium-promoted Pd/C catalyst resulted in a significantly improved yield greater than 96% of the desired product, 1-(4-isobutylphenyl) ethanol (4-IBPE), compared with the non-patented literature results under a mild hydrogenation condition. A detailed hydrogenation network over the Pd/C catalyst was suggested. The reaction mechanism for the yield and selectivity enhancement of 4-IBPE induced-by the promoted Pd/C was elucidated in relation to the geometric and electronic effects of reactant molecules in the microporous support depending on the reaction steps.

Keywords

Selective Hydrogenation 1-(4-Isobutylphenyl)ethanol Pd/C Preparation Sodium Promotion 4-Isobytylacetophenone

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