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1. 发明授权

US06214234B1 Method for the removal of cesium from radioactive waste liquids 有权
标题翻译：从放射性废液中去除铯的方法
公开(公告)号：US06214234B1
公开(公告)日：2001-04-10
申请号：US09202453
申请日：1998-12-15
申请人： Risto Harjula , Jukka Lehto
发明人： Risto Harjula , Jukka Lehto
IPC分类号： C02F142
CPC分类号： G21F9/12 , B01J39/02 , B01J39/09 , C01C3/11 , C01D17/00 , C01P2004/50 , C01P2004/61 , C22B3/42 , C22B26/10 , G21F9/007 , Y02P10/234
摘要： A method for removal of cesium from aqueous solution, particularly from nuclear waste liquids. The cesium-containing aqueous solution is contacted with a solid-state hexacyanoferrate compound of a transition element for binding cesium to the hexacyanoferrate. The aqueous solution of reduced cesium content is separated from the hexacyanoferrate. Preferably, a nickel or cobalt hexacyanoferrate is utilized having a fraction of exchangeable transition elements smaller than 35 %. The hexacyanoferrate compound of said transition element may be produced by slowly adding an aqueous solution of the hexacyanoferrate into the transition element salt solution, the concentration of the transition element salt solution being at least 0.35 mol/l, stirring the mixture at ambient temperature during the addition, and separating and recovering the resulting hexacyanoferrate precipitate from the mixture. This method has achieved volume reductions—that is, volume of cesium-containing waste liquid remaining in the ion-exchange column reduced from volume of cesium-containing aqueous solution treated—of as much as 9000 fold.
摘要翻译：一种从水溶液中除去铯的方法，特别是从核废液中除去铯。含铯水溶液与用于将铯结合到六氰基铁酸盐的过渡元素的固态六氰基铁酸盐化合物接触。将还原的铯含量的水溶液与六氰基铁酸盐分离。优选地，使用具有小于35％的可交换过渡元素的一部分的六氰基铁酸镍或钴。所述过渡元素的六氰基铁酸盐化合物可以通过将六氰基铁酸盐的水溶液缓慢加入到过渡元素盐溶液中，过渡元素盐溶液的浓度为至少0.35mol / l，在环境温度下搅拌该混合物加入，并从混合物中分离和回收得到的六氰基铁酸盐沉淀。该方法已经实现体积减少 - 即离子交换塔中残留的含铯废液体积比处理的含铯水溶液的体积减少多达9000倍。

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