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Korean Journal of Chemical Engineering, Vol.30, No.2, 306-313, 2013
Selective hydrogenation of 4-isobutylacetophenone over a sodium-promoted Pd/C catalyst
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.
[References]
- Mills PL, Ramchandran PA, Chaudhari RV, Rev. Chem.Eng., 8, 1, 1992
- Thakar N, Polder NF, Djanashvili K, van Bekkum H, Kapteijn F, Moulijn JA, J. Catal., 246(2), 344, 2007
- Elango V, Davenport KG, Murphy MA, Mott GN, Zey EG, Smith BL, Moss GL, Patent EP 400892 A2, 1990
- Ryan DA, Patent EP 358420 A21990.
- Smith A, Lampard JF, Patent EP 299668 A11989.
- Mathew SP, Rajasekharam MV, Chaudhari RV, Catal. Today, 49(1-3), 49, 1999
- Quintanilla A, Bakker JJW, Kreutzer MT, Moulijn JA, Kapteijn F, J. Catal., 257(1), 55, 2008
- Rajashekharam MV, Bergault I, Fouilloux P, Schweich D, Delmas H, Chaudhari RV, Catal. Today, 48(1-4), 83, 1999
- Rajashekharam MV, Chaudhari RV, Chem. Eng. Sci., 51(10), 1663, 1996
- Saeki K, Shima K, Patent JP 02078639 A1990.
- Thakar N, Berger RJ, Kapteijn F, Moulijn JA, Chem. Eng. Sci., 62(18-20), 5322, 2007
- Thakar N, Schildhauer TJ, Buijs W, Kapteijn F, Moulijn JA, J. Catal., 248(2), 249, 2007
- Cho HB, Lee JC, Park YH, Catal. Today, 111(3-4), 417, 2006
- Mahata N, Raghavan KV, Vishwanathan V, Appl. Catal. A: Gen., 182(1), 183, 1999
- Breitner E, Roginski E, Rylander PN, J. Org. Chem., 24, 1855, 1959
- Suh DJ, Park TJ, Ihm SK, J. Catal., 149(2), 486, 1994
- Cho HB, Hong BE, Park JH, Ahn SH, Park YH, Bull. Korean Chem. Soc., 29, 2434, 2008
- Malyala RV, Rode CV, Arai M, Hegde SG, Chaudhari RV, Appl. Catal. A: Gen., 193(1-2), 71, 2000
- Marinelli TB, Nabuurs S, Ponec V, J. Catal., 151(2), 431, 1995
- Muramatsu A, Tatsumi T, Tominaga H, Bull. Chem. Soc. Jpn., 60, 3157, 1987
- Suh DJ, Park TJ, Ihm SK, Carbon., 31, 1993
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