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在钨、钼的各种分离技术中,溶剂萃取法占有重要地位。前人的工作主要是围绕在酸性介质中使用P_(204)、TBP等萃取剂展开的,效果一般不够理想。 本文探索伯胺在中性和弱碱性条件下萃取分离钨、钼的规律。结果表明,对于高钨低钼或高钼、低钨的弱碱性溶液,只要控制加入硫酸,维持平衡水相pH7～8,都可将钨优先萃入有机相。前者萃取使用的有机相为含10～40％伯胺M_(1923)的煤油溶液,单级
In the various tungsten, molybdenum separation technology, solvent extraction plays an important role. Previous work mainly focused on the use of P_ (204), TBP and other extractants in acidic medium, the effect is generally not ideal. This article explores the primary and secondary basic amine extraction of tungsten and molybdenum under neutral conditions. The results show that the tungsten can be extracted into the organic phase as soon as possible by controlling the addition of sulfuric acid and maintaining the equilibrium aqueous pH of 7-8 for the weakly alkaline solution of high-tungsten, low-molybdenum or high-molybdenum, low-tungsten. The former was extracted using a kerosene solution containing 10 to 40% of primary amine M_ (1923), and the single stage