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    • 75. 发明授权
    • Method for the removal of cesium from radioactive waste liquids
    • 从放射性废液中去除铯的方法
    • US06214234B1
    • 2001-04-10
    • US09202453
    • 1998-12-15
    • Risto HarjulaJukka Lehto
    • Risto HarjulaJukka Lehto
    • C02F142
    • G21F9/12B01J39/02B01J39/09C01C3/11C01D17/00C01P2004/50C01P2004/61C22B3/42C22B26/10G21F9/007Y02P10/234
    • 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.
    • 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。
    • 77. 发明授权
    • Crystal growth from solution
    • 晶体从溶液中生长
    • US4171344A
    • 1979-10-16
    • US483303
    • 1974-06-26
    • Howard J. Guggenheim
    • Howard J. Guggenheim
    • C01C3/11C01C3/00
    • C30B29/58C01C3/11C30B35/002C30B7/14
    • Crystals are grown from solution by the introduction of a first fluid into a second fluid by permeation through a porous partition. Introduction of the first fluid produces supersaturation of the desired material in the combined fluid in the vicinity of the partition. Supersaturation results in the production of crystals. The crystals grow from the partition into the solution. The supersaturation is produced by one of several mechanisms including: chemical reaction producing a less soluble element or compound; decomplexation produced by dilution or pH change; and introduction of solution into a solvent in which the material is less soluble.
    • 晶体从溶液中生长,通过渗透通过多孔隔板将第一流体引入第二流体。 引入第一种流体会在隔板附近的组合流体中产生所需材料的过饱和度。 过饱和导致晶体生成。 晶体从分区生长到溶液中。 过饱和由几种机理之一产生,包括:产生较少可溶性元素或化合物的化学反应; 通过稀释或pH变化产生的络合; 并将溶液引入其中材料较不溶解的溶剂中。