摘要
以高分子/二氧化硅双重负载的纳米钌为催化剂,由间二硝基苯液相催化加氢制备间苯二胺,考察了反应温度、压力、催化剂用量、溶剂等对催化反应的影响,同时对催化剂的稳定性进行了研究。结果表明,该催化剂具有很高的催化活性,以甲醇为溶剂,间二硝基苯初始浓度0.5 mol/L,温度80℃,压力1.5MPa,反应1.5 h后间二硝基苯转化率和间苯二胺选择性分别达到95.6%和99%以上;同时,催化剂具有良好的稳定性,经过25次套用实验后,催化剂的反应性能未发生明显变化。
Catalytic hydrogenation for m-dinitrobenzene（m-DNB） in liquid phase was introduced for prodcution of m-phenylenediamine using nanosized ruthenium catalyst supported by polymer/silica di-supporter.Effects of reaction temperature,pressure,the amount of catalysts and solvent on conversion of m-dinitrobenzene and selectivity of m-phenylenediamine were investigated.Stability of catalyst was also studied.Supported nanosized ruthenium catalyst exhibited higher activity.Under the optimized conditions（methanol as solvent,initial concentration of substrate 0.5 mol/L,80 ℃ and 1.5 MPa）,reaction time about 1.5 h,conversion of m-dinitrobenzene was up to 95.6% and selectivity of m-phenylenediamine was as high as 99%.The catalyst exhibited good stability,it was not obviously deactivated after being used for 25 times.
出处
《应用化工》
CAS
CSCD
2011年第1期51-54,共4页
Applied Chemical Industry
基金
兰州石化职业技术学院资助项目(K09-03)
关键词
负载型纳米钌催化剂
间苯二胺
间二硝基苯
液相催化加氢
supported nanosized ruthenium catalyst
m-dinitrobenzene
m-phenylenediamine
catalytic hydrogenation in liquid-phase
