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Received October 14, 2002
Accepted December 12, 2002
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The Effects of Impeller Characteristics in the Hydrogenation of Aniline on Ru/C Catalyst
Division of Material Science and Chemical Engineering, Hanyang University, 1271, Sa-1-Dong, Ansan-Si, Kyonggi-Do 425-791, Korea
Korean Journal of Chemical Engineering, March 2003, 20(2), 262-267(6), 10.1007/BF02697238
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Abstract
Effects of impeller characteristics have been studied in the hydrogenation of aniline on Ru/C catalyst. Dual impellers were employed and the experiments were performed at 300 rpm using a lab-scale reactor. Reaction with disk turbines (DT) resulted in the higher cyclohexylamine (CHA) selectivity and higher reaction rate compared to that with pitched blade turbines (PBT). When a combination of PBT and DT impellers was employed, high product selectivity and reaction rate were obtained and the selectivity was maintained constant. Changes in the product selectivity with the impeller geometry were explained in terms of the relative rates of the side reactions depending on the hydrogen concentration in the reaction mixture.
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References
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Eldib IA, Albright LF, Ind. Eng. Chem., 49, 825 (1957)
Greenfield H, J. Org. Chem., 29, 3082 (1964)
Kaufman P, "New Hydrogenation Technology: Improvements in Product Yield and Uniformity - Reductions in Reaction Time and Catalyst Costs," Proceedings from AchemAsia, Beijing, China (1998)
Jo MC, Song SH, Noh BI, Kim JH, Korean J. Chem. Eng., 13(4), 337 (1996)
Lewis EG, Terry LH, John GF, Chem. Eng., 110 (1975)
Lewis EG, Jerry RM, Phillip LF, Chem. Eng., 114 (1976)
Lu WM, Wu HZ, Chou CY, Korean J. Chem. Eng., 16(5), 703 (1999)
Nagata S, "Mixing, Principles and Application," Kodansha Ltd., 407 (1975)
Nishimura S, Tetsuo S, Tomoyoshi H, Bull. Chem. Soc. Jpn., 39, 329 (1966)
Oldshue JY, Chem. Eng. Prog., 60 (1980)
Richard WH, Lewis EG, Chem. Eng., 141 (1976)
Sven H, U.S. Patent, 4,779,990 (1988)
Van't Riet K, Boom JM, Smith JM, Trans. IChemE, 54, 124 (1976)
Zajcew M, J. Am. Oil Chem. Soc., 37, 11 (1960)
