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1. 发明授权

US4428910A PROCESS FOR STRIPPING URANIUM FROM ALKYL PYROPHOSPHORIC ACID 失效
标题翻译：从碱性磷酸中分离铀的方法
公开(公告)号：US4428910A
公开(公告)日：1984-01-31
申请号：US26747381
申请日：1981-05-27
申请人： PRODECO INC
发明人： WORTHINGTON RALPH E , MAGDICS ALEX
IPC分类号： B01D11/04 , C01B25/238 , C01G20060101 , C01G43/00 , C22B60/02
CPC分类号： C22B60/026 , Y02P10/212
摘要： A process is described for the recovery of tetravalent uranium from wet-process phosphoric acid utilizing an alkyl pyrophosphoric acid extractant or the like. After extracting the tetravalent uranium from wet-process acid, iron is stripped from the pregnant extractant into an oxalic acid stripping solution and then the tetravalent uranium is stripped from the pregnant extractant into an oxalate stripping solution. The oxalate stripping solution is an aqueous solution of an alkali metal or ammonium oxalate. The barren extractant is recycled for contacting with fresh wet-process acid. The uranium is oxidized and then precipitated in the oxalate stripping solution. The precipitated solids are separated from the solution, and the uranium is dried to a UO3 product.
摘要翻译：描述了使用烷基焦磷酸萃取剂等从湿法磷酸中回收四价铀的方法。从湿法酸提取四价铀后，将铁从怀孕的萃取剂中剥离成草酸剥离溶液，然后将四价铀从怀孕的萃取剂中剥离成草酸溶液。草酸盐剥离溶液是碱金属或草酸铵的水溶液。贫瘠的萃取剂被再循环用于与新鲜的湿法酸接触。铀被氧化，然后在草酸盐剥离溶液中沉淀。将沉淀的固体与溶液分离，并将铀干燥成UO 3产物。

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