p-xylenediamine is widely used as the chemical raw materials and fine chemical intermediates. At present It is widely used in the drug, dyes, paint, nylon, synthetic resins, additives, curing agents, fiber finishing agent, anti-rust agent, chelating agent, lubricants etc. With the use of p-xylenediamine gradually increased, It has important application value of the study in its process. But the study on it is not Much, The paper mainly studys the synthesis of p-xylenediamine from terephthalonitrile by hydrogenation In the Presence of catalyst .The catalytic hydrogenation of nitriles has important role in organic synthesis and fine chemical field. Catalyst the main factors of the hydrogenation of nitrile reduction. In this paper three catalysts were used for the synthesis of p-xylenediamine from terephthalonitrile by hydrogenation,that is Raney Ni,Pd/C and Ni-Al-Fe-Cr alloy.Ni-Al-Fe-Cr alloy is Prepared by ourself.The structures of it are determined by XRD, BET and FluorescenceThis paper Raney Ni,Pd/C and Ni-Al-Fe-Cr alloy catalysts were used for the hydrogenation, During each catalytic hydrogenation the effeets of reaction Parameters including solvent,amount of solvent and catalysts, reaction time,temperature and Pressure were investigated . and the life and regeneration of the catalyst were also studied .by comparing the hydrogenation reaction conditions and the product yield of each catalyst ,combining with the actual industrial production, Pd/C catalyst is the best one, the optimum conditions obtained were: Pd/C as catalyst and methanol as solvent, raw material / methanol = 1:15, the temperature 65℃, pressure 2MPa, reaction time is 1 hour, the product of the yield of p-xylenediamine is 81.3%, the process conditions are suitable for industrial production, so the studys on the synthesis of p-xylenediamine from terephthalonitrile by hydrogenation In the Presence of catalyst has very important value. |