对氨基苯酚电解合成的放大研究

采用阴极转动分隔式电解槽，研究了硫酸电解液中硝基苯电解合成对氨基苯酚（ＰＡＰ）的放大过程。当槽电流５００Ａ、电流效率６１．６％时，硝基苯的转化率为９２．７％，ＰＡＰ收率达７１．０％，直流电单耗为８．２１ｋＷｈ·（ｋｇ·ＰＡＰ）￣（－１）；合成的产物经高效液相色谱、红外和紫外光谱等分析，含量在９６．ｏ％以上，且无发现异物体和杂质峰。

STUDY ON THE SCALE-UP OF THE ELECTROL YTIC SYNTHESIS OF para-AMINOPHEHOL

Abstract The process of scale-up for synthetic para-aminophenoi(PAP)by the electrolytic reductionof nitrobenzene is studied by using the cell of arotating cathode in the solution of a sulfuricacid.The research shows that the conversion ofnitrobenzene is 92.7%,the yield of PMP is 71.0%,the cost of D.C.is 8.2lkWh·(kgPAP)￣(-1)when the electrolytic corrent is 500A throughoutthe run and the current efficiency is 61.6%.Thetitle compoud has been analyzed by high pressureliquid chromatography,infrared spectrum and ul-traviolet spectrum.The analysis shows that thepurity of PAP is higher than 96.0%,and thereis not any isomer and impurity peak.