发明授权
- 专利标题： Bis(dialkylthiophosphoryl)amines as metal extractants
- 专利标题（中）： 双（二烷基硫代磷酰）胺作为金属萃取剂
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申请号： US348997申请日： 1994-11-29
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公开(公告)号： US5502250A公开(公告)日： 1996-03-26
- 发明人: John Campbell , Raymond F. Dalton , Peter M. Quan
- 申请人： John Campbell , Raymond F. Dalton , Peter M. Quan
- 申请人地址： GB2 London
- 专利权人： Zeneca Limited
- 当前专利权人： Zeneca Limited
- 当前专利权人地址： GB2 London
- 优先权： GBX9211906 19920605; GBX9302332 19930205
- 主分类号： B01D11/00
- IPC分类号： B01D11/00 ; C07F9/24 ; C07F9/28 ; C07F9/36 ; C07F9/44 ; C07F9/6568 ; C22B3/26 ; C22B3/28 ; C22B3/38 ; C22B19/00 ; C22B19/20
摘要：
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.
公开/授权文献
- US4395018A Valve member with fixed seal shutoff 公开/授权日：1983-07-26