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Study on Pd-catalyst used for hydrogenation of fluorine-containing aromatic nitro-compounds

YUAN Jiacheng,LU Weiping,ZHOU Zhuang   

  1. Jiangsu Food Vocational Technical College;Jiangsu Anpon Electrochemical Co.,Ltd.
  • Online:2008-02-05 Published:2008-02-05

含氟芳香族硝基化合物加氢用钯催化剂的研究

袁加程,卢卫平,周 壮   

  1. 江苏食品职业技术学院; 江苏安邦电化有限公司

Abstract: The present situation of synthesis of aramides by catalytic hydrogenation was reviewed. The preparation of Pd-Fe/SiO2 catalyst by the dipping process is introduced. Factors affecting catalytic properties,such as carrier,components,reductant,baking temperature,and time,were studied,and optimal conditions were obtained as:w(Pd)=5%,w(Fe)=0.2%; potassium borohydride as reductant; Pd-Fe/ SiO2 was roasted for 4 h at 500 ℃. Tests for reusing the catalyst,verifying optimal conditions,and comparing with other catalysts such as Raney Ni,Pt/C,and Pd/C were made. The results showed that Pd-Fe/ SiO2 catalyst had high selectivity,the yield of the reaction was more than 97.5%,the purity of product was more than 98.0%,and the catalyst can be reused 10 times .

摘要: 介绍了以浸渍法制备Pd-Fe/SiO2催化剂,研究其载体、金属组分、还原剂、焙烧温度和时间等因素对催化剂催化性能的影响。确定了最优工艺条件:w(Pd)=5%,w(Fe)=0.2%,硼氢化钾作还原剂,焙烧温度500 ℃,焙烧时间4 h。重复使用试验、优化验证试验、与其它催化剂如Raney Ni、Pt/C和Pd/C等对比试验结果表明,Pd-Fe/SiO2催化剂用于含氟芳香族硝基化合物的常压催化加氢反应,收率大于97.5%,纯度达到98.0%以上,选择性好,催化剂可重复使用10次。

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