(1. 有研科技集团有限公司 生物冶金国家工程实验室，北京 101407；
2. 有研资源环境技术研究院(北京)有限公司，北京 101407；
3. 北京有色金属研究总院，北京 100088；
4. 有研工程技术研究院有限公司，北京 101407)
摘 要: 在萃取实践中发现，钴会对羟肟萃取剂产生毒化，严重制约钴萃取冶金的应用和发展。介绍了羟肟萃取体系下钴萃取的发展现状，详细综述了羟肟萃取体系下钴的氧化和毒化行为及其机理，通过对比分析了钴在氨性介质溶液体系和羟肟萃取体系下的化学性质及行为，阐明钴对羟肟萃取剂毒化产生的原因。在此基础上，重点综述有机羧酸和有机磷酸对羟肟萃取体系下钴的毒化的抑制行为及机理，分析了有机磷酸/羟肟协萃体系下毒化被抑制的原因，指出当前在钴对羟肟萃取剂毒化及其抑制研究方面存在的问题与不足，展望未来该领域有待深入研究的方向与方法，为钴对羟肟萃取剂毒化问题的解决提供了理论依据和指导方向。
关键字: 羟肟萃取剂；钴的萃取；毒化；有机酸；抑制机制
（1. National Engineering Laboratory of Biometallurgy, GRINM Group Co., Ltd., Beijing 101407, China;
2. GRINMAT Resources and Environment Technology Institute Co., Ltd, Beijing 101407, China;
3. General Research Institute for Nonferrous Metals, Beijing 100088, China;
4. GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China）
Abstract:The poisoning of the extractant caused by cobalt was observed during cobalt extraction process, which severely restrict the application of hydroxyoxime extractant and the further growth of cobalt extraction. This article introduces the development status of cobalt extraction with hydroxyoxime extractants. The oxidation and poisoning behaviors and mechanisms of cobalt under hydroxyoxime extraction system in detail were reviewed. Comparative analyses of the chemical properties and behavior of cobalt in ammonia and hydroxyoxime organic solution were conducted, and the cause of poisoning of hydroxyoxime extractants by cobalt was clarified. On this basis, the inhibition behaviors and mechanisms of the poisoning organic carboxylic acid and phosphoric acid with the hydroxyoxime extraction system were reviewed emphatically, the reasons why the poisoning inhibited with phosphoric acid/hydroxyoxime synergistic extraction systems were analyzed. The current problems and deficiencies of poisoning of hydroxyoxime extractants caused by cobalt and its inhibitions are pointed out. Finally, the paper looks forward to the future directions and methods for in-depth research in this field, which provides a theoretical basis and guidance for solving the problem of poisoning of hydroxyoxime extractants caused by cobalt.
Key words: hydroxyoxime extractant; cobalt extraction; poisoning; organic acid; inhibition mechanism
