钯前躯体对钯碳催化剂硝基苯加氢的影响

Effect of Palladium Precursors on the Hydrogenation of Nitrobenzene on Pd/C Catalysts

苯胺是精细化工品最重要的中间体之一,在染料工业、农药工业、香料工业和橡胶工业等领域广泛应用。本文以硝基苯为反应物,利用不同钯前躯体(硝酸钯、氯钯酸、硝酸铵钯和醋酸钯)制备钯碳催化剂,催化加氢生产苯胺。研究发现,硝酸钯在活性炭上的吸附率最高,制备的钯碳催化剂加氢活性最高,苯胺的收率能达到99%。

Aniline is one of the most important intermediates of fine chemicals,and is widely used in the dye industry,pesticide industry,perfume industry and rubber industry.In this paper,nitrobenzene is used as the reactant,and different palladium precursors(palladium nitrate,chloropalladium acid,ammonium nitrate and palladium acetate)are used to prepare Pd/C catalysts to catalyze hydrogenation to produce aniline.The study finds that the adsorption rate of palladium nitrate on activated carbon is the highest,the prepared Pd/C catalysts has the highest hydrogenation activity,and the yield of aniline can reach 99%.