Electrocatalysis Synthesis of p-Aminophenol with the Hydrogen-storage Alloy Electrode of MlNi_3.6Co_0.7Mn_0.4Al_0.3 AITranslate

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Chinese Library Classification Number:TQ151.52[化学工程—电化学工业]

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Electrocatalysis synthesis of p-aminophenol（PAP） from nitrobenzene using hydrogen-storage alloy electrode as the catalytic reducer was studied in sulphuric acid system.The effects of technical conditions such as kinds of organic solvent,reaction temperature and sulphuric acid concentration on the yield of PAP and current efficiency were discussed.The PAP content in catholyte was determined directly by spectrophotometry.The results show that hydrogen-storage alloy electrode can electrolyze and reduce nitrobenzene to prepare PAP.And the optimal electrolysis conditions are as follows： Isopropanol is employed as the organic solvent,electrolysis time 4 h,reaction temperature 80 ℃,current density 200 mA/cm2,and sulphuric acid concentration 20%（volume fraction）.Under the optimal conditions the PAP yield is 58.6% and the current efficiency is up to 78.5%.