Hydrogenation performance of o-chloronitrobenzene over Pd/C under atmospheric pressure

doi:10.16085/j.issn.1000-6613.2016.02.027

Chemical Industry and Engineering Progree ›› 2016, Vol. 35 ›› Issue (02): 524-527.DOI: 10.16085/j.issn.1000-6613.2016.02.027

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Hydrogenation performance of o-chloronitrobenzene over Pd/C under atmospheric pressure

LIU Xianxiang¹, YANG Yongjun², YIN Dulin¹, LEI Dichen², YANG Jing², SU Shengpei¹

1 National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, Hunan, China;
2 Chenzhou Gao Xin Material Co., Ltd., Chenzhou 423000, Hunan, China

Received:2015-05-11 Revised:2015-08-10 Online:2016-02-05 Published:2016-02-05

常压条件下Pd/C催化邻氯硝基苯加氢反应

刘贤响¹, 杨拥军², 尹笃林¹, 雷涤尘², 杨静², 苏胜培¹

1 石化新材料与资源精细利用国家地方联合工程实验室, 湖南师范大学化学化工学院, 湖南长沙 410081;
2 郴州高鑫材料有限公司, 湖南郴州 423000

通讯作者: 尹笃林。E-mail:dulinyin@126.com。
作者简介:刘贤响(1985-),男,实验师,博士研究生。E-mail:liuxx_219@126.com。
基金资助:
湖南省教育厅科研项目(13C562,15B134)。

Abstract

Abstract: Activated carbon supported noble metal Pd,Pt and Ru catalysts were prepared by chemical reduction method,and were used in the synthesis of o-chloroaniline from o-chloronitrobenzene without any dechlorinating inhibitor and promoter added. The results of the experiments demonstrated that the Pd/C catalysts had better catalytic performances than Pt/C catalysts and Ru/C catalysts. The effects of solvent,reaction temperature,reaction time and other factors were examined using a Pd/C catalyst. The results showed that a 100% conversion of o-chloronitrobenzene was achieved with a selectivity of 87.4% to o-chloroaniline by small amount of 5% Pd/C catalyst under atmospheric pressure. Furthermore,the catalyst could be reused for 6 runs without significant loss of catalytic activity. The new technology was featured as lower reaction pressure,lower catalyst dosage,shorter reaction time and lower dechlorinating,and therefore suitable for industrial production.

Key words: palladium, activated carbon, o-chloronitrobenzene, o-chloroaniline, catalysis, hydrogenation

摘要： 用化学还原法制备了活性炭负载Pd、Pt和 Ru共3种贵金属催化剂,在没有添加任何脱氯抑制剂和助剂的前提下,比较研究了3种催化剂在邻氯硝基苯(o-CNB)加氢制邻氯苯胺(o-CAN)反应中的催化性能,发现Pd/C催化剂效果更佳。以Pd/C为催化剂,考察了溶剂种类、反应温度、反应时间和重复使用次数等因素对邻氯硝基苯转化率及邻氯苯胺选择性的影响。实验结果表明:常压条件下,Pd与邻氯硝基苯的质量比为1/2120,反应时间90min,邻氯硝基苯转化率和邻氯苯胺选择性分别可达100%和 87.4%。催化剂在重复使用6次后仍保持较高的活性。该工艺具有反应压力低、催化剂用量少、反应时间短和脱氯少等特点,适合工业化生产。

关键词: 钯, 活性炭, 邻氯硝基苯, 邻氯苯胺, 催化, 加氢

CLC Number:

O643.32

LIU Xianxiang, YANG Yongjun, YIN Dulin, LEI Dichen, YANG Jing, SU Shengpei. Hydrogenation performance of o-chloronitrobenzene over Pd/C under atmospheric pressure[J]. Chemical Industry and Engineering Progree, 2016, 35(02): 524-527.

刘贤响, 杨拥军, 尹笃林, 雷涤尘, 杨静, 苏胜培. 常压条件下Pd/C催化邻氯硝基苯加氢反应[J]. 化工进展, 2016, 35(02): 524-527.

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Hydrogenation performance of o-chloronitrobenzene over Pd/C under atmospheric pressure

常压条件下Pd/C催化邻氯硝基苯加氢反应

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