负载型双金属催化剂催化间苯二甲腈加氢制备间苯二甲胺

摘要

采用浸渍法制备活性炭负载Ni、Ru、Rh单金属及Ni-Ru、Ru-Rh双金属催化剂，考察反应温度、反应压力和m（催化剂）：m（间苯二甲腈）对间苯二甲腈加氢制备间苯二甲胺的影响。结果表明，Ni-Ru/C催化活性高于Ru/C和Ni/C，通过分步浸渍法制备的Ni-Ru/C催化活性优于一步浸渍法。以甲醇和甲苯为混合溶剂，在m（催化剂）：m（间苯二甲腈）=1：20、反应温度120℃、反应压力4.0 MPa和1000 r · min-1条件下，无需加入碱性抑制剂，间苯二甲胺收率最高可达97.78%。%Ni,Ru,Rh monometal and Ni-Ru and Ru-Rh bimetallic catalysts supported on activated carbon were prepared by the impregnation method. The effects of reaction temperatures,reaction pressure and m(catalyst):m( m-phthalonitrile)on the hydrogenation of isophthalonitrile to m-xylylenediamine were investigated. The results showed that the activity of Ni-Ru/C catalyst was better than that of Ru/C and Ni/C catalysts. The property of Ni-Ru/C catalyst prepared by separate-step impregnation method was superior to that by one step impregnation method. The maximum m-xylylenediamine yield reached 97. 78%under the condition of m(catalyst):m(m-phthalonitrile)=1:20,1 000 r·min-1,reaction temperature 120 ℃ and reaction pressure 4 . 0 MPa with the mixture solvent of methanol and toluene and without any alkaline inhibitors.