公开(公告)号：US06949232B2

公开(公告)日：2005-09-27

申请号：US10157915

申请日：2002-05-31

申请人： Gavin Kerry Wyllie Freeman ,  Ockert Gerbrandt Pauw ,  Russell Peter Kofluk ,  James John Budac

发明人： Gavin Kerry Wyllie Freeman ,  Ockert Gerbrandt Pauw ,  Russell Peter Kofluk ,  James John Budac

IPC分类号： C01G51/12 ,  C22B23/00

CPC分类号： C01G51/12

摘要： There is provided an improvement in a process for producing cobalt (III) hexammine sulphate which process comprises oxidatively pressure leaching nickel cobalt sulphides in an ammoniacal ammonium sulphate solution. The nickel and cobalt sulphides are oxidized to sulphates, and an ammoniacal leach liquor in which dissolved cobalt is predominantly in the (III) oxidation state is produced. The ammoniacal leach liquor is combined with ammonia to precipitate the triple salt of cobalt (III) hexammine sulphate, nickel (II) hexammine and ammonium sulphate which is further treated to produce a crystalline cobalt (III) hexammine sulphate and a nickel enriched leach liquor. The improvement involves the provision of a second oxidative pressure treatment effective to maximize the formation of the desired cobalt (III) hexammine ion, prior to the triple salt precipitation step.

摘要翻译： 提供了一种用于生产硫酸六硫酸钴的方法的改进，该方法包括在氨硫酸铵溶液中将镍钴硫化物氧化浸出。 镍和钴的硫化物被氧化成硫酸盐，产生溶解的钴主要处于（III）氧化态的氨浸出液。 将氨浸出液与氨结合，沉淀出硫酸钴（III），硫酸镍（II）和硫酸铵的三重盐，进一步处理以产生结晶的硫酸钴（III）和硫酸镍浸出液。 改进涉及提供第二氧化压力处理，其有效地在三盐沉淀步骤之前最大化所需的钴（III）六亚胺离子的形成。