α-亚硝基-β-萘酚的合成及其在硫酸锌溶液中除钴工艺的研究

以β-萘酚,亚硝酸钠为原料系统研究了α-亚硝基-β-萘酚在冰乙酸溶液中的合成工艺。考察了反应时间、反应温度、反应pH值、物料比例对合成α-亚硝基-β-萘酚产率的影响。试验结果表明在最优工艺条件下其合成产率可达95.15%。进行了α-亚硝基-β-萘酚沉淀分离硫酸锌溶液(中浸上清)中钴的条件和优化试验,对药剂的用量、反应时间、反应温度、pH范围等因素进行了考察,确定了α-亚硝基-β-萘酚沉钴的最佳反应条件。采用该工艺可将硫酸锌溶液中的钴含量降至0.2 mg/L。

Study on synthesis of l-nitroso-2-naphthol and its application in cobalt removal process in zinc sulfate solution

Taking 2-naphthol,sodium nitrite as raw materials,the synthetic process of l-nitroso-2-naphthol in glacial acetic acid solution was systematically studied.The effects of reaction time,reaction temperature and reaction pH value and proportion of materials on the productivity of synthetized 1-nitroso-2-naphthol was investigated.And the test results showed that the synthetic productivity of 1-nitroso-2-naphthol reached 95.15%under optimal process conditions.The condition and optimal test of precipitation and separation of cobalt in zinc sulfate solution by 1-nitroso-2-naphthol were performed,the amount of reagent,reaction time and temperature,range of pH,etc.were investigated,and the optimum reaction condition of precipitation of cobalt by 1-nitroso-2-naphthol was determined.The cobalt content in zinc sulfate solution was reduced to 0.2mg/L using this process.