摘要
研究了溶剂苯和乙醇对间二硝基苯加氢制间苯二胺的反应过程的影响.结果表明,中间产物在溶剂中的溶解度对反应选择性有重要影响,间亚硝基硝基苯在苯中含量远小于乙醇.2MPa下,随反应温度从50℃升至90℃,反应时间苯溶剂中从350min减少至75min,乙醇溶剂中从120min减少至35min.80℃下,随氢压从0.4MPa升至2.8MPa,反应时间苯溶剂中从250min减少至85min,乙醇中从70min减少至40min.有机物和氢气在溶剂中的溶解度及由溶剂效应引起的催化剂表面的吸脱附行为对反应速率有较大影响.
The effects of solvent benzene and ethanol on catalytic process of hydrogenation m-dinitrobenzene to produce m-phenylenediamine were studied.The solubility of intermediates in solvents has significant effect on its selectivity,and intermediate m-nitoso-nitrobenzene in benzene is less than that in ethanol.With the reaction temperature increasing from 50 to 90℃（at 2 MPa）,the reaction time is reduced from 350 to 75 min in benzene,while from 120 to 35 min in ethanol.With the reaction pressure increasing 0.4 to 2.8 MPa,the reaction time is reduced from 250 to 85 min in benzene,while from 70 to 40 min in ethanol.The solubility of hydrogen and organic product,and the adsorption behaviors of hydrogen and organic product on catalysts in different solvents have significant effects on reaction rate.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第2期304-308,共5页
The Chinese Journal of Process Engineering
关键词
溶剂
间二硝基苯
反应过程
催化加氢
相分离
solvent
m-dinitrobenzene
reaction process
catalytic hydrogenation
phase separation
