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提出了从水溶液中萃取和分离金属的新方法 ,称之为“泡沫浮选萃取”法。该方法集成了两个众所周知的工艺 :溶剂萃取和泡沫浮选。在适用于每种金属的特定pH下 ,采用有机酸萃取剂萃取金属 ,在萃取时形成泡沫 ,气泡把萃取相输送到泡沫中 ,与此同时 ,混合溶液。该方法兼有浮选的处理能力高 ,而成本低 ,和萃取选择性高 ,残余金属含量低的优点。提出了描述相分离效率的等式 ,并用于过程最优化中。该方法在俄罗斯化工厂的水循环生产工艺中试验并应用。该工艺的最后一个工序是含锌和铜的两种泡沫产品的溶剂萃取提纯 ,以生产出“化学纯”品级的硫酸盐 ,以及循环水和残余萃取剂分选。
A new method of extracting and separating metals from aqueous solution was proposed, which is called “froth flotation extraction”. The method integrates two well-known processes: solvent extraction and froth flotation. The metal is extracted with an organic acid extractant at a specific pH suitable for each metal to form a foam upon extraction which delivers the extract phase to the foam while the solution is being mixed. The method combines the advantages of high flotation capacity, low cost, high extraction selectivity and low residual metal content. An equation describing the phase separation efficiency is proposed and used in process optimization. The method is tested and applied in the water cycle production process of chemical plants in Russia. The final process of the process is solvent extraction and purification of both foam products containing zinc and copper to produce “chemically pure” grades of sulphate and recycle water and residual extractants.