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Catalytic hydrogenation of 1,4-phenylenediamine to 1,4-cyclohexanediamine

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Abstract

Catalytic hydrogenation of 1,4-phenylenediamine to 1,4-cyclohexanediamine using Ru/Al2O3 as a catalyst was carried out in water, and the results were compared with those in isopropanol and SC-CO2. 80% 1,4-phenylenediamine conversion with 87% selectivity to 1,4-cyclohexanediamine was achieved on 5% Ru/Al2O3 catalyst at 90°C and H2 pressure of 4 MPa. The hydrogenation of 1,4-phenylenediamine is influenced by the solvent. A systematic study of the hydrogenation of 1,4-phenylenediamine revealed that the reaction was consecutive. The longer the time, the lower was the CHDA selectivity. Also, the reaction temperature was an important parameter and played a vital role in preventing the formation of side products.

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Authors and Affiliations

  1. Chemical Engineering Research Center, East China University of Science and Technology (ECUST), Shanghai, 200237, China

    Hongxian Ma & Jianguo Cai

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  1. Hongxian Ma
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  2. Jianguo Cai
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Correspondence to Jianguo Cai.

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Ma, H., Cai, J. Catalytic hydrogenation of 1,4-phenylenediamine to 1,4-cyclohexanediamine. Russ J Appl Chem 87, 397–403 (2014). https://doi.org/10.1134/S1070427214030239

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  • DOI: https://doi.org/10.1134/S1070427214030239

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