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公开(公告)号：US07569192B2
公开(公告)日：2009-08-04
申请号：US11117046
申请日：2005-04-28
CPC分类号： G21F9/06 , C22B60/0239 , C22B60/0291 , G21G4/08
摘要： A method of separating isotopes from a mixture containing at least two isotopes in a solution is disclosed. A first isotope is precipitated and is collected from the solution. A daughter isotope is generated and collected from the first isotope. The invention includes a method of producing an actinium-225/bismuth-213 product from a material containing thorium-229 and thorium-232. A solution is formed containing nitric acid and the material containing thorium-229 and thorium-232, and iodate is added to form a thorium iodate precipitate. A supernatant is separated from the thorium iodate precipitate and a second volume of nitric acid is added to the thorium iodate precipitate. The thorium iodate precipitate is stored and a decay product comprising actinium-225 and bismuth-213 is generated in the second volume of nitric acid, which is then separated from the thorium iodate precipitate, filtered, and treated using at least one chromatographic procedure. A system for producing an actinium-225/bismuth-213 product is also disclosed.
摘要翻译： 公开了一种从溶液中含有至少两种同位素的混合物中分离同位素的方法。 第一同位素沉淀并从溶液中收集。 从第一个同位素产生和收集一个女儿同位素。 本发明包括从含有钍-229和钍-232的材料制备锕-225 /铋-213产物的方法。 形成含有硝酸和含有钍-229和钍-232的物质的溶液，并加入碘酸盐以形成碘酸钍沉淀物。 将上清液从碘酸钍沉淀物中分离，并将第二体积的硝酸加入碘酸钍沉淀物中。 储存碘化钍沉淀物，并在第二体积的硝酸中产生包含锕-225和铋-213的衰变产物，然后将其从碘酸钍沉淀中分离出来，过滤并使用至少一个色谱法进行处理。 还公开了一种制备锕-225 /铋-213产物的体系。
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2.依法登记的发明
公开(公告)号：USH808H
公开(公告)日：1990-08-07
申请号：US256812
申请日：1988-10-12
申请人： Darryl D. Siemer , Leroy C. Lewis
发明人： Darryl D. Siemer , Leroy C. Lewis
CPC分类号： B01D53/22 , B01D61/00 , B01D63/06 , B01D2313/42
摘要： A process for removing I, R, Xe and Kr which involves the passage of the off gas stream through a tube-in-shell assembly, whereby the tubing is a PTFE membrane which permits the selective passages of the gases for removing and isolating the gases.
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公开(公告)号：US4599517A
公开(公告)日：1986-07-08
申请号：US541186
申请日：1983-10-12
申请人： Leroy C. Lewis , David R. Trammell
发明人： Leroy C. Lewis , David R. Trammell
摘要： A disposable rabbit for transferring radioactive samples in a pneumatic transfer system comprises aerated plastic shaped in such a manner as to hold a radioactive sample and aerated such that dissolution of the rabbit in a solvent followed by evaporation of the solid yields solid waste material having a volume significantly smaller than the original volume of the rabbit.
摘要翻译： 用于在气动输送系统中转移放射性样品的一次性兔子包括以保持放射性样品并充气的方式成型的充气塑料，使得兔在溶剂中的溶解随后蒸发固体产生具有体积的固体废物 明显小于原来体积的兔子。
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公开(公告)号：US4032614A
公开(公告)日：1977-06-28
申请号：US624030
申请日：1975-10-20
申请人： Leroy C. Lewis
发明人： Leroy C. Lewis
摘要： Large quantities of alkali metals may be safely reacted for ultimate disposal by contact with a hot concentrated caustic solution. The alkali metals react with water in the caustic solution in a controlled reaction while steam dilutes the hydrogen formed by the reaction to a safe level.
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公开(公告)号：US06951634B2
公开(公告)日：2005-10-04
申请号：US10247016
申请日：2002-09-18
CPC分类号： G21F9/06 , C22B60/0239 , C22B60/0291 , G21G4/08
摘要： The invention includes a method of separating isotopes from a mixture containing at least two isotopes in a solution. A first isotope is precipitated and is collected from the solution. A daughter isotope is generated and collected from the first isotope. The invention includes a method of producing an actinium-225/bismuth-213 product from a material containing thorium-229 and thorium-232. A solution is formed containing nitric acid and the material and iodate is added to form a thorium iodate precipitate. A supernatant is separated from the thorium iodate precipitate and a second volume of nitric acid is added to the precipitate. The precipitate is stored and a decay product comprising actinium-225 and bismuth-213 is generated in the second volume of nitric acid which is then separated from the thorium iodate precipitate, filtered, and treated using at least one chromatographic procedure. The invention also includes a system for producing an actinium-225/bismuth-213 product.
摘要翻译： 本发明包括从溶液中含有至少两种同位素的混合物中分离同位素的方法。 第一同位素沉淀并从溶液中收集。 从第一个同位素产生和收集一个女儿同位素。 本发明包括从含有钍-229和钍-232的材料制备锕-225 /铋-213产物的方法。 形成含有硝酸的溶液，并加入物质和碘酸盐以形成碘酸钍沉淀物。 将上清液从碘化钍沉淀物中分离出来，向沉淀物中加入第二体积的硝酸。 储存沉淀物，并在第二体积的硝酸中产生包含锕-225和铋-213的衰变产物，然后将其从碘化钍沉淀中分离出来，过滤并使用至少一个色谱法进行处理。 本发明还包括用于制备锕-225 /铋-213产物的系统。
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