Liquid-Phase Hydrogenation to 2, 4-Tolylenediamine over Supported HY Catalysts

Abstract:

We have successfully prepared a novel passivation Ni/HY catalyst by the technologies of macerate-precipitatio.The catalysts are comprised of two contents: HY as carrier, Ni as active component，and we put it into the process of preparating aromatic amines.The nature of the catalysts was discussed based on the characterization results of BET , IR , SEM , XRD , TEM ,TPD , XPS and TPR . The catalytic hydrogenation technology for 2,4-dinitrobenzene in liquid phase can be an attractive and elegant routine for production of 2,4-tolylenediamine. The catalytic activity is evaluated at 2.2 MPa, 90 °C, 750r/min, solvent with reaction materials mass ratio of 60, catalyst with reaction materials mass ratio of 0.1. In the catalytic test, The experimental results over the catalyst showed that 2,4-dinitrobenzene and 2,4-tolylenediamine conversion and selective of 99.88% and 99.16% were obtained respectively.It is found that the catalyst is highly dispersion, stable, and reusable. No obvious deactivation of the catalyst was observed after repeated using twelve times.

• Periodical: Advanced Materials Research (Volumes 512-515)
• Pages: 2381-2385
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.512-515.2381
• Online since: May 2012
• Authors: Xue Mei Zhang, Feng Xing Niu
• Keywords: Catalytic Hydrogenation, HY Molecular Sieve, Nickel-Based Ni/ HY Catalyst

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