【摘要】 研究了对氨基苯酚（PAP）的萃取提纯技术,它适用于硝基苯催化加氢还原液的分离。研究了溶剂种类。pH值、温度、相比等因素对萃取过程的影响。对萃取使用过的溶剂采用精馏的方法进行回收,从而获得了适合于医药用的高纯度对氨基苯酚（PAP）,其关键杂质4,4’-二氨基二苯醚含量低于10×10^-6。更多还原

【Abstract】 The separation and purification method of p - aminophenol (PAP) with extraction is studied in this thesis. The studied purification method is suitable for hydrogenate of nitrobenzene under hydrogen gas with catalyst. First, the solvents for extraction by purification are selected. Second, the extraction conditions, for example, pH value, temperature, ratio of organic phase volume to watery phase volume, are experimentally investigated. The used solvent in extraction are rectified and recovered. The obtained p - aminophenol with high purity is suitable for production of medicine. The 4, 4’ -diaminodiphenylether content of PAP is less than 10×10-6.更多还原