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在接近工业生产的条件下 ,研究从Zn NH3 H2 O体系中以LIX5 4选择性萃取锌的过程。研究表明 ,用LIX5 4从Zn NH3 H2 O体系中选择萃取锌的主要影响因素是溶液的 pH值和总氨浓度。锌萃取率随着pH值升高先增大 ,后减小。氨浓度越大 ,最大萃取平衡分配比所对应的pH值越小。溶液中总锌离子浓度对萃取平衡时的分配比几乎没有影响
In the process of industrial production, the selective extraction of zinc from Lix5 4 from Zn NH 3 H 2 O was studied. The results show that the main influencing factors for the selective extraction of zinc from Zn NH 3 H 2 O by LIX 54 are the pH value of the solution and the total ammonia concentration. The extraction rate of zinc first increases with the increase of pH value and then decreases. The higher the ammonia concentration, the smaller the pH value corresponding to the maximum extraction equilibrium distribution ratio. The total zinc ion concentration in the solution has almost no effect on the distribution ratio at the time of extraction equilibrium