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首页> 外文期刊>Separation and Purification Technology >Separation of cobalt and nickel from ammoniacal sulphate solution using Cyanex 272
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Separation of cobalt and nickel from ammoniacal sulphate solution using Cyanex 272

机译：使用Cyanex 272从硫酸铵溶液中分离钴和镍

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摘要

The SO2-ammoniacal ammonium sulphate leach liquor of manganese nodule bearing iron,manganese,copper,nickel,cobalt and zinc was subjected to aeration/oxygenation to precipitate out the minor quantities of iron and manganese leaving the other metal values in tact.After extraction of copper from the Fe-and Mn-free leach liquor with LIX 841,stripping of ammonia from the Cu-barren raffmate,precipitation of metal sulphides from the solution and leaching of the sulphide precipitates with H2SO4,the leach liquor bearing 0.58 kg/m3 Cu,2.67 kg/m3 Zn,2.012 kg/m3 Co,23.747 kg/m3 Ni and 10.0 kg/m3(NH4)2SO4 was obtained.After extraction of the remaining copper with LIX84I and zinc with D2EHPA from the leach liquor,it was left with Co,Ni and(NH4)2SO4.Extraction of cobalt from the Cu-Zn-free solution was carried out using Cyanex 272 in kerosene followed by extraction of nickel from the cobalt-free solution with NaCyanex 272 in kerosene.Extraction of both cobalt and nickel increased with increasing equilibrium pH and extractant concentration.The species extracted into the organic phase were CoA2 and NiA2-HA.The highest separation factor for cobalt and nickel was obtained with 0.1 M Cyanex 272 at pH 5.46.
机译：对含铁，锰，铜，镍，钴和锌的锰结核的SO2-氨硫酸铵浸出液进行曝气/氧化，以沉淀出少量的铁和锰，使其他金属值保持不变。含LIX 841的无铁和无锰浸出液中的铜，贫铜萃余液中的氨气溶出，溶液中金属硫化物的沉淀以及H2SO4浸出硫化物沉淀物，含0.58 kg / m3 Cu的浸出液获得了2.67 kg / m3的Zn，2.012 kg / m3的Co，23.747 kg / m3的Ni和10.0 kg / m3（NH4）2SO4。从浸出液中用LIX84I和D2EHPA萃取剩余的铜后，将其剩下在煤油中使用Cyanex 272从无铜锌溶液中萃取钴，然后在煤油中用NaCyanex 272从无钴溶液中萃取镍。镍随着当量的增加而增加萃取到有机相中的物种为CoA2和NiA2-HA.0.1 M Cyanex 272在pH 5.46下获得了钴和镍的最高分离因子。

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