发明授权
- 专利标题: Method of removing niobium from uranium-niobium alloy
- 专利标题(中): 从铀铌合金中除去铌的方法
-
申请号: US455975申请日: 1989-11-13
-
公开(公告)号: US5084253A公开(公告)日: 1992-01-28
- 发明人: Eugene N. Pollock , David S. Schlier , George Shinopulos
- 申请人: Eugene N. Pollock , David S. Schlier , George Shinopulos
- 申请人地址: MA Concord
- 专利权人: Nuclear Metals, Inc.
- 当前专利权人: Nuclear Metals, Inc.
- 当前专利权人地址: MA Concord
- 主分类号: C01G33/00
- IPC分类号: C01G33/00 ; C01G43/06 ; C22B34/24 ; C22B60/02 ; G21C19/46
摘要:
A method of removing niobium from a uranium-niobium alloy includes dissolving the uranium-niobium alloy metal pieces in a first aqueous solution containing an acid selected from a group consisting of HCl and H.sub.2 SO.sub.4 and a fluoboric acid as a catalyst to provide a second aqueous solution which includes uranium (U.sup.+4), acid radical ions, the acids and insolubles including uranium oxides and niobium oxides; adding nitric acid to the insolubles to complete the oxidation of the niobium oxides to yield niobic acid and further solubilizing thr uranium oxide; and separating the niobic acid, nitric acid and solubilized uranium oxides.
公开/授权文献
- US4023189A Wide angle fundus illumination and photography apparatus 公开/授权日:1977-05-10