磷(膦)型萃取剂中,某些烷基膦酸单烷基酯(如P_(507))和某些具有高位阻效应的二烷基磷酸(如5601),都是萃取分离镍钴的优良萃取剂。但是,从目前来看,这两种萃取剂价格较高。所以,寻找萃取分离镍钴较好且价格低廉的萃取剂,具有很大的现实意义。我们与北京铀矿选冶研究所协作,针对高冰镍硫酸浸出液组分,探索了不同结构的烷基(或环烷基)膦酸单烷基酯类(代号57系列的萃取剂)萃取分离镍钴。结果表明, Some phosphorus alkyl phosphonates (such as P_ (507)) and some dialkyl phosphates with high steric effects (such as 5601) Excellent extractant. However, for the time being, these two extractants are more expensive. Therefore, it is of great practical significance to find a better and lower cost extractant for nickel-cobalt extraction and separation. In collaboration with the Beijing Institute of Uranium Ore Mining and Metallurgy, we have explored the extraction and separation of nickel and cobalt from monoalkyl esters of alkyl (or cycloalkyl) phosphonates (code-57 series) . The results show,