摘要
研究了以改性骨架Ni催化剂液相催化乙腈加氢制备乙胺的工艺。考察了Ti改性骨架Ni催化剂中Ti/Ni摩尔比,反应体系中NaOH助剂的加入量和加氢反应温度、H2压力、搅拌速率等因素对改性骨架Ni催化乙腈液相加氢制备乙胺反应的影响。确定了Ti改性骨架Ni催化剂最适宜的Ti/Ni摩尔比和催化乙腈加氢制备乙胺的最佳工艺条件,并初步探讨了Ti改性骨架Ni催化剂对乙腈催化加氢反应的影响机制。结果表明,在Ti/Ni摩尔比为0.012的改性骨架Ni催化剂作用下,以水作溶剂,NaOH助剂的加入量为0.20g/l,在反应温度333～343K、H2压力1.0MPa、搅拌速率1000r/min的反应条件下,乙腈的转化率达到100%,乙胺的选择性可达75.6%。此外,还根据Ti改性骨架Ni催化剂液相催化乙腈加氢反应中重复使用的情况考察了其稳定性。
The hydrogenation reaction of acetonitrile catalyzed by Ti modified raney Ni catalyst to prepare ethylamine in liquid phase was studied. The effects of Ti/Ni molar ratio in Ti modified raney Ni catalyst, added amount of NaOH in the reaction system and the operation conditions, such as hydrogenation reaction temperature, hydrogen pressure and stirring rate, on the catalytic hydrogenation of acetonitrile in liquid phase were carefully investigated. The optimal Ti/Ni molar ratio of Ti modified raney Ni catalyst and conditions of hydrogenation reaction were determined. The impact mechanism of Ti modified raney Ni catalyst on acetonitrile hydrogenation reaction was discussed. The experimental results showed that the conversion of acetonitrile could reach 100%, the selectivity of ethylamine could reach 75.6% under the reaction conditions of reaction temperature 333-343 K, hydrogen pressure 1.0 MPa, stirring rate 1000 r/min, and by using the Ti modified raney Ni catalyst with Ti/Ni molar ratio of 0. 012 as catalyst, water as solvent, and 0.20 g/l NaOH as an addition agent in the hydrogenation reaction of acetonitrile. In addition, the stability of the catalyst was discussed according to its reapplication.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2008年第1期90-94,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
Ti改性骨架
NI催化剂
液相加氢
乙腈
乙胺
收率
选择性
Ti modified raney Ni catalyst
hydrogenation in liquid-phase
acetonitrile
ethylamine yield
selectivity
