Abstract: The method to recover MoO22+ from leachate of cobalt-molybdenum spent catalyst was presented and an effective new technology was developed for comprehensive recovery. Through discussing the relationship between certain metals extraction efficiency E and pH of several metals，PC-88A was chosen to extract MoO22+ from the leachate of cobalt-molybdenum spent catalyst. Aqueous phase pH，extractant concentration，O/A （the ratio of organic phase volume and water phase volume），stirring time，stirring speed and extraction temperature were investigated with single factor experiments to understand how to influence efficiency of extraction and determine the optimum conditions for MoO22+ recovery process. The optimum extraction conditions for MoO22+ were as follows：Aqueous phase pH 0.85，extractant concentration 15%，O/A 3∶1（v/v），stirring time 30min，and stirring speed 500r/min，extraction temperature 24℃. The new process was simple and had high extraction efficiency for MoO22+ from the leacheate of cobalt-molybdenum spent catalyst，indicating good environmental benefits and potential practical prospects.

Key words: PC-88A, cobalt-molybdenum spent catalyst, extraction, MoO22+, new technology

摘要： 全面阐述了从钴钼废催化剂浸取液中综合回收有价金属离子MoO22+的方法，设计出有效的综合回收新工艺。通过讨论某些金属的萃取率E和平衡pH值之间的关系，确定采用PC-88A来有效萃取钴钼废催化剂浸取液中的MoO22+。通过单因素实验重点研究了水相pH值、萃取剂浓度、相比、搅拌时间、搅拌速率及萃取温度等因素对萃取率的影响，确定了MoO22+回收过程的最佳工艺条件。结果表明在水相pH≈0.85，萃取剂浓度为15%（体积分数），相比为3∶1（体积比），搅拌时间为30min，搅拌速率为500r/min，温度为24℃时最有利于MoO22+的萃取。新工艺流程简单，钴钼废催化剂浸取液中MoO22+的萃取率高，不仅具有很好的环境效益，而且具有潜在的应用前景。

关键词: PC-88A, 钴钼废催化剂, 萃取, MoO22+, 新工艺