水溶性含钌-铂双金属催化剂催化卤代芳香硝基化合物选择性加氢

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (5): 884.

水溶性含钌-铂双金属催化剂催化卤代芳香硝基化合物选择性加氢

周娅芬^1,2, 陈骏如¹, 李瑞祥¹, 赵松林¹, 李贤均¹

1. 四川大学化学学院有机金属络合催化研究所, 成都 610064;
2. 西华师范大学化学系, 南充 637002

收稿日期:2003-07-03 出版日期:2004-05-24 发布日期:2004-05-24
通讯作者: 李贤均(1938年出生),男,教授,博士生导师,从事有机金属络合催化研究.E-mail:scuulixj@mail.sc.cninfo.net E-mail:scuulixj@mail.sc.cninfo.net

Selective Hydrogenation of Halonitroaromatic Compounds Catalyzed by Water-soluble Bimetallic Catalyst Containing Ruthenium and Platinum

ZHOU Ya-Fen^1,2, CHEN Jun-Ru¹, LI Rui-Xiang¹, ZHAO Song-Lin¹, LI Xian-Jun¹

1. Institute of Organometallic Complex Catalysis, College of Chemistry, Sichuan University, Chengdu 610064, China;
2. Department of Chemistry, China West Normal University, Nanchong 637002, China

Received:2003-07-03 Online:2004-05-24 Published:2004-05-24

摘要/Abstract

摘要： 考察了水溶性Ru/Pt-TPPTS双金属催化剂催化卤代芳香硝基化合物的加氢性能.实验结果表明,在Ru-TPPTS中添加铂或钯后,反应活性明显提高,尤其是Ru/Pt-TPPTS双金属催化剂更表现出显著的双金属协同效应.在pH₂=1.0MPa,70℃,反应2h的条件下,双金属催化剂0.50Ru/0.50Pt-TPPTS催化对-氯硝基苯加氢生成对-氯苯胺的反应转化率达到100%.对于取代基和取代位置不同的一些卤代硝基苯加氢,该双金属催化剂也表现出很高的催化活性和生成卤代苯胺的选择性,脱卤反应的程度很小.

关键词: 水溶性双金属催化剂, 催化加氢, 卤代芳香硝基化合物, 双金属协同效应

Abstract: Selective hydrogenation of halonitroaromatic compounds catalyzed by water-soluble bimetallic catalyst containing ruthenium and platinum in the aqueous/organic two-phase system was studied. It was found that the reaction rate increased obviously due to the addition of Pt and Pd. Ru/Pt-TPPTS bimetallic catalyst exhibits a strong synergic effect when the molar ratio of Ru to Pt is 1/1. Under the conditions of 70 ℃, p H₂=1.0 MPa, the conversion of p-Cl-C₆H₄NO₂ is 100% in the presence of Ru/Pt-TPPTS catalyst, which is higher than that of Ru-TPPTS or Pt-TPPTS, the selectivity of p-Cl-C₆H₄NH₂ is more than 99%. The catalyst also exhibits a high activity and selectivity for the hydrogenation of other haloaromatic nitro-compounds with different substituents and substituted positions. Meanwhile, the amount of dehalogenation product(aniline) is about 1%.

Key words: Water-soluble bimetallic catalyst, Catalytic hydrogenation, Halonitroaromatic compound, Bimetallic synergic effect

中图分类号:

O643

TrendMD:

周娅芬, 陈骏如, 李瑞祥, 赵松林, 李贤均. 水溶性含钌-铂双金属催化剂催化卤代芳香硝基化合物选择性加氢. 高等学校化学学报, 2004, 25(5): 884.

ZHOU Ya-Fen, CHEN Jun-Ru, LI Rui-Xiang, ZHAO Song-Lin, LI Xian-Jun . Selective Hydrogenation of Halonitroaromatic Compounds Catalyzed by Water-soluble Bimetallic Catalyst Containing Ruthenium and Platinum. Chem. J. Chinese Universities, 2004, 25(5): 884.

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