摘要
考察了不同氯化物改性的骤冷骨架镍(QS-Ni)催化剂对3-氯-4-甲基硝基苯(CMNB)选择性加氢制备3-氯-4-甲基苯胺(CMAN)反应的影响。实验结果表明,采用SnCl4.5H2O或SnCl2.2H2O改性时,QS-Ni催化剂的活性提高,且在CMNB完全转化的条件下,CMAN的选择性可达100.0%。同时考察了反应条件的影响,当n(SnCl4.5H2O)∶n(QS-Ni)=1∶8时,在55℃、1.0MPa、7.0g CMNB、25mL甲醇、催化剂用量0.20g的条件下反应100min,CMNB转化率和CMAN选择性均达到100.0%;且延长反应时间,仍能完全抑制脱氯副反应的发生,CMAN的选择性保持在100.0%。
Hydrogenation of 3-chloro-4-methylnitrobenzene ( CMNB ) to 3-chloro-4-methylaniline (CMAN) over quenched skeletal nickel (QS-Ni) catalyst modified by various chlorides was investigated. The results showed that the catalytic activity of QS-Ni modified by SnCl4·5H2O or SnCl2·2H2O was enhanced and selectivity to CMAN could reach 100.0% in the case of complete conversion of CMNB. Under the optimized conditions of 0.20 g the modified QS-Ni catalyst with n(SnCl4·5H2O) : n(QS-Ni) 1 : 8, 55 ℃, 1.0 MPa, CMNB 7.0 g and methanol 25 mL, both the conversion of CMNB and the selectivity to CMAN could reach 100% after reaction for 100 min. The side-reaction dechlorination had still not been observed even after another 25 rain reaction.
出处
《石油化工》
CAS
CSCD
北大核心
2011年第6期630-634,共5页
Petrochemical Technology
基金
国家高技术研究发展计划项目(2007AA03Z345)
辽宁省教育厅2010年度高等学校科研项目(LT2010021)
大连理工大学基本科研业务费专项资金资助项目(DUT10RC(3)107)