申请人:Zeneca Limited
公开号:US05502250A1
公开(公告)日:1996-03-26
A process for extracting metal values especially zinc values from aqueous solutions of metal salts which comprises contacting the aqueous solution with an organic phase comprising a compound of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4, independently, represents an optionally substituted hydrocarbyl or hydrocarbyloxy group or R.sup.1 and R.sup.2 together with the attached phosphorus atom and/or R.sup.3 and R.sup.4 together with the attached phosphorus atom form a 5- to 8-membered heterocyclic ring.
一种从金属盐的水溶液中提取金属价值,特别是锌价值的过程,其包括将水溶液与具有以下结构的化合物组成的有机相接触:##STR1## 其中R.sup.1,R.sup.2,R.sup.3和R.sup.4中的每一个,独立地代表可选择取代的烃基或烃氧基,或者R.sup.1和R.sup.2与所附的磷原子以及/或R.sup.3和R.sup.4与所附的磷原子形成5-到8-成员杂环环。