【摘要】 以Ni/K₂O-La₂O₃-Al₂O₃为催化剂,采用固定床反应器,系统地考察了反应温度、氢气空速、己二腈液时空速和进料速率等对己二腈选择加氢生成6-氨基己腈的影响。结果表明,随着反应温度的升高,己二腈加氢转化率先增加后降低,6-氨基己腈选择性逐步下降;其中提高氢气空速、降低己二腈液时空速和进料速率（氢腈物质的量之比不变）,均有利于提高己二腈转化率,但6-氨基己腈选择性下降。以乙醇为溶剂,在常压,温度180℃,氢气空速3 600 h^-1,己二腈液时空速0.24 h^-1,己二腈的乙醇溶液流速5 mL/h（氢腈物质的量之比为86）的条件下,催化性能较好,反应40 h后趋于稳定,己二腈的转化率基本维持在50%～55%,6-氨基己腈的选择性为80%左右。更多还原

【Abstract】 Effects of temperature,hourly space velocity （GHSV） of H₂ and liquid hourly space velocity （LHSV） of adiponitrile （ADN） and feed flow rate （fixed molar ratio of Hydrogen to ADN） on selective hydrogenation of ADN to 6-aminocapronitrile （ACN） were systematically investigated over Ni/K₂OLa₂O₃-Al₂O₃ catalyst in a fixed-bed reactor.The results showed that conversion of ADN and selectivity of ACN firstly increased then decreased with the increase of reaction temperature.With the increase of GHSV of H₂,the decrease of LHSV of ADN and feed flow rate,the conversion of ADN increased,while the selectivity of ACN decreased.The conversion of ADN and the selectivity of ACN reached 50%-55% and 80%,respectively,after reaction 40 h,under the reaction conditions of using ethanol as solvent,normal pressure,180℃,3 600 h^-1 of GHSV,0.24 h^-1 of LHSV and 5 mL/h of feed flow.更多还原