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由于处理氧化铜矿物的需要,促进了湿法冶金提取金属的进一步发展。国外近20年来,用萃取法从浸出液中提取铜发展很快,这在很大程度上与有许多能有效地选择性萃取铜的萃取剂有关。Lix和Acorga型羟肟类萃取剂得到了广泛的应用。苏联也合成了这类萃取剂——ОМГ和АВФ。 除了选择性好以外,二苯甲酮肟类萃取剂的特点是萃取和反萃取动力学速度慢,以及容量低,例如:10％АВФ-煤油溶液容量为3—4g/1铜。此外,上述萃取剂从酸性溶液(pH≤1)中提取铜时分配系数低,溶液需要预先中和。 由于在β羟肟(Lix-70—Lix-74萃取剂)分子苯环中引入了电子接受体,可以从酸度比较高的溶液中萃取铜,然而,此时必须用浓度为300g/l或更高的硫酸溶液进行反萃
Due to the need to process copper oxide minerals, further advances in hydrometallurgical extraction metals are promoted. In the recent 20 years abroad, extraction of copper from leachate by extraction has developed rapidly, which is largely related to the fact that there are many extractive agents that can selectively and selectively extract copper. Lix and Acorga type of hydroxyoxime extractant has been widely used. The Soviet Union also synthesized such extractants - ХМГ and АВФ. In addition to good selectivity, benzophenone oxime extractants are characterized by slow extraction and back-extraction kinetics and low capacity, for example 10% АВФ-kerosene solution with 3-4 g / l copper. In addition, the above extractant has a low partition coefficient when copper is extracted from an acidic solution (pH ≦ 1) and the solution needs to be pre-neutralized. Due to the incorporation of electron acceptors into the phenyl ring of the beta-hydroxyoxime (Lix-70-Lix-74 extractant) molecule, copper can be extracted from a solution of relatively high acidity, however, in which case the concentration of 300g / l or more High sulfuric acid solution for stripping