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1.发明授权Process for the production of sintered nuclear fuel pellets from precipitated solutions with the aid of hydrogen peroxide in an acid medium 失效借助于过氧化氢在酸性介质中从沉淀溶液中生产烧结核燃料颗粒的方法
公开(公告)号：US5391347A
公开(公告)日：1995-02-21
申请号：US180478
申请日：1994-01-12
CPC分类号： C04B35/51 , C01G43/01 , C01G43/025 , G21C3/623 , C01P2004/50 , C01P2004/61 , C01P2006/10 , C01P2006/12 , C01P2006/37 , C01P2006/80 , Y02E30/38
摘要： Process for obtaining fritted oxide pellets of the MxOy type for nuclear fuels from solutions of soluble salts of the element or elements M, involving stage of precipitating the elements M by hydrogen peroxide in an acid medium. During this precipitation, there is an instantaneous dispersion of one of the reagents (solution of salts or peroxide) in the other, in order to obtain a homogenous mixture and an also instantaneous precipitation of the nuclei in a continuous liquid phase confined in an enclosure having minimum dimensions, the mother liquors being rapidly exhausted. The process makes it possible to obtain sintered pellets whose density exceeds 96% of the theoretical density.
摘要翻译： 从元素M的可溶性盐溶液中获得MxOy型核燃料的烧结氧化物颗粒的方法，涉及在酸性介质中通过过氧化氢沉淀元素M的阶段。 在该沉淀期间，其中一种试剂（盐或过氧化物溶液）的瞬时分散在另一种中，以获得均匀的混合物，并且在限制在具有 最小尺寸，母液迅速耗尽。 该方法可以获得密度超过理论密度的96％的烧结颗粒。
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2.发明授权
公开(公告)号：US4758411A
公开(公告)日：1988-07-19
申请号：US795409
申请日：1985-11-06
申请人： Antoine Floreancig
发明人： Antoine Floreancig
CPC分类号： C22B60/026 , Y02P10/212
摘要： A process for the recovery of uranium which has been extracted from phosphate-bearing solutions by means of an organic solvent and which is re-extracted from said solvent by means of hydrofluoric acid is disclosed.The process is characterized in that sodium ions are introduced into the solution of hydrofluoric acid, while aluminum and magnesium ions may also be added to the sodium ions. That solution may be produced by recycling of a fraction of the suspension of fluoride from the re-extraction step, after having separated the solvent, and to which a make-up of sodium, aluminum and magnesium ions and hydrofluoric acid was added.
摘要翻译： 公开了一种通过有机溶剂从含磷溶液中提取并通过氢氟酸从所述溶剂中再萃取的回收铀的方法。 该方法的特征在于将钠离子引入氢氟酸溶液中，而铝和镁离子也可以加入到钠离子中。 该溶液可以通过在分离溶剂之后再循环来自再萃取步骤的一部分氟化物悬浮液，并且加入钠，铝和镁离子和氢氟酸的组合来制备。
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3.发明授权
公开(公告)号：US4643882A
公开(公告)日：1987-02-17
申请号：US586288
申请日：1984-03-05
申请人： Antoine Floreancig
发明人： Antoine Floreancig
IPC分类号： C01B25/235 , C22B60/02 , C01G43/00 , C01B25/234
CPC分类号： C01B25/235 , C22B60/026 , C22B60/0282
摘要： A process for the recovery of the uranium present in phosphoric acid produced by a wet process in (A) by means of a suitable solvent (L.sub.9), which is carried out after separation of the gypsum in (B) formed in the attack operation, and elimination of the solid materials which are still in suspension, characterized in that, in order to avoid the formation of dross in the course of the operation of extracting the uranium which is previously reduced in (D), the step of eliminating the solid materials which are still in suspension is effected by a final solid-liquid separation operation in (C) and/or in (E), prior to extraction of the uranium in (F), in the presence of an added fraction of gypsum (S.sub.22) and/or (S.sub.23) resulting from the production of H.sub.3 PO.sub.4.
摘要翻译： 通过在（A）中通过在攻击操作中形成的（B）中分离石膏之后进行的合适的溶剂（L9）回收在（A）中通过湿法生产的磷酸中存在的磷酸的方法， 以及消除仍处于悬浮状态的固体材料，其特征在于为了避免在（D）中预先减少的铀萃取操作过程中形成浮渣，消除固体物质的步骤 在（F）中提取铀之前，在添加的石膏馏分（S22）的存在下，通过（C）和/或（E）中的最终固液分离操作， 和/或（S23）。
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4.发明授权Method of making nuclear fuel pellets, comprising producing and using pourable, frittable powders obtained directly by precipitation of peroxides 失效制备核燃料颗粒的方法，包括生产和使用直接通过沉淀过氧化物获得的可倾倒的易碎粉末
公开(公告)号：US4971734A
公开(公告)日：1990-11-20
申请号：US377117
申请日：1989-07-10
申请人： Antoine Floreancig , Paul Mollard
发明人： Antoine Floreancig , Paul Mollard
IPC分类号： C01B15/047 , C01F15/00 , C01F17/00 , C01G27/02 , C01G43/01 , C01G56/00 , C04B35/64 , G21C3/62
CPC分类号： C01F17/0043 , C01B15/0475 , C01F15/00 , C01F17/0012 , C01G27/02 , C01G43/01 , C01G56/005 , G21C3/623 , C01P2004/40 , C01P2004/61 , C01P2006/10 , C01P2006/12 , C01P2006/20 , C01P2006/60 , C01P2006/80 , C01P2006/82 , Y02E30/38
摘要： A method of obtaining pellets of MxOy oxide, where M represents one or more elements used to make nuclear fuel pellets, as a means of obtaining very high density fritted pellets directly, i.e. without the intermediate powders being conditioned, comprising starting with a solution of soluble salts of the M elements, and treating them with hydrogen peroxide with the pH kept at from 2 to 2.5, in a continuous fluidized bed reactor comprising at least 3 superposed cylindrical sections of different diameters, the solutions in the central section being agitated vigorously, to obtain a precipitate which is subsequently calcined reduced, pressed then fritted.
摘要翻译： 获得M x O y氧化物颗粒的方法，其中M表示用于制造核燃料颗粒的一种或多种元素，作为直接获得非常高密度烧结颗粒的方法，即不调节中间体粉末，包括从可溶性溶液 在含有至少3个重叠的不同直径的圆柱形切片的连续流化床反应器中，将pH值保持在2至2.5的过氧化氢处理它们，并将中心部分的溶液剧烈搅拌，至 得到沉淀，随后煅烧还原，然后烧结。
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5.发明授权
公开(公告)号：US4381286A
公开(公告)日：1983-04-26
申请号：US271941
申请日：1981-06-09
申请人： Antoine Floreancig
发明人： Antoine Floreancig
CPC分类号： C22B60/026
摘要： The present invention relates to a process for the selective separation of uranium and molybdenum which are contained in an extract resulting from an amino solvent liquid-liquid extraction of a solution resulting from an attack on a molybdo-uraniferous ore by means of sulphuric acid, and which comprises re-extraction of the uranium in the presence of an oxidizing agent by means of an acid solution of an alkali metal chloride, followed by re-extraction of the molybdenum by means of an alkali metal carbonate solution. This process is characterized by using an oxidizing agent such as hydrogen peroxide, a small amount of which is added to the acid alkali metal chloride solution before the latter is brought into contact with the extract. This makes it possible to achieve selective separation of the uranium and molybdenum. This process can be used wherever molybdo-uraniferous ores are treated and where there is a requirement to produce a uranium concentrate which complies with the limits set in regard to the molybdenum content.
摘要翻译： 本发明涉及一种选择性分离铀和钼的方法，所述方法包括在由通过硫酸对钼 - 铀矿矿进行的溶液的液 - 液萃取的氨基溶剂萃取物中提取的提取物中， 其包括在氧化剂存在下，通过碱金属氯化物的酸溶液重新萃取铀，然后通过碱金属碳酸盐溶液重新萃取钼。 该方法的特征在于使用氧化剂如过氧化氢，其中少量加入到酸性碱金属氯化物溶液中，然后使其与萃取物接触。 这使得可以实现铀和钼的选择性分离。 该方法可用于处理钼矿石矿石的地方，并且需要生产符合钼含量设定限值的铀浓缩物。
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公开(公告)号：US4363788A
公开(公告)日：1982-12-14
申请号：US130127
申请日：1980-03-13
CPC分类号： C22B3/0032 , C01G39/00 , C01G39/003 , C22B3/0012 , C22B3/0095 , C22B60/0252 , Y02P10/234
摘要： A process for separating by means of an organic agent the uranium and the molybdenum contained in an aqueous liquor originating from a sulphuric attack of an urano-molybdeniferous ore which involves placing the said attacking liquor in contact with an organic extraction solution containing at least one tertiary or secondary amine in an (amine)/(Mo) molar ratio of up to 0.8, separating the molybdenum-charged organic phase from the uranium-rich aqueous phase, treating the organic phase with an aqueous liquor containing at least one mineral agent in the form of alkaline and ammonium hydroxide and/or carbonates to form an aqueous solution which is concentrated in molybdate.
摘要翻译： 一种通过有机试剂分离铀和钼的方法，所述铀和钼含有源自乌拉维 - 钼矿石的硫酸侵蚀的含水液体，其涉及使所述攻击液与含有至少一个第三级的有机萃取溶液接触 或仲胺以（胺）/（Mo）摩尔比达到0.8，将富含铀的有机相与富含铀的水相分离，在含有至少一种矿物试剂的含水液体中处理有机相， 形式的碱性和氢氧化铵和/或碳酸盐形成浓缩在钼酸盐中的水溶液。
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公开(公告)号：US5219540A
公开(公告)日：1993-06-15
申请号：US829266
申请日：1992-02-03
CPC分类号： C01G55/001 , C22B3/24 , Y02P10/234
摘要： A method for removing ruthenium from a uranium-containing solution comprising adding a nitrite to the solution and passing the solution over a quaternary ammonium or tertiary amine resin to selectively fix the ruthenium.
摘要翻译： 一种从含铀溶液中除去钌的方法，包括向溶液中加入亚硝酸盐并使溶液通过季铵或叔胺树脂以选择性固定钌。
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8.发明授权
公开(公告)号：US4585626A
公开(公告)日：1986-04-29
申请号：US516965
申请日：1983-07-25
申请人： Antoine Floreancig
发明人： Antoine Floreancig
IPC分类号： C01B15/047 , C22B60/02 , C01F13/00
CPC分类号： C01B15/0475 , C22B60/0239 , C22B60/026
摘要： A process for making into useful products the uranium and rare earths contained in impure uranium tetrafluoride resulting from the recovery of uranium from phosphoric acid, comprising dissolving it in a hot condition in a nitric medium in the presence of an aluminum compound, treating the resulting solution with a solvent for extracting uranyl nitrate, which contains a phosphoric ester, and separating from the aqueous phase from which the uranium is removed, the solvent which is charged with uranyl nitrate to be made into a useful product, which provides that, in order to achieve easy separation of the aqueous phase from which the uranium has been removed, from the uranyl nitrate extraction solvent:(a) The operation of dissolution of UF.sub.4 is carried out in two steps at a suitable temperature, the first step comprising introducing insufficient amounts of nitric acid and the aluminum compound for complete dissolution of the impure uranium tetrafluoride and keeping the resulting suspension in an agitated condition for a period of time of at least 0.5 hour, and the second step comprising introducing amounts of nitric acid and the aluminum compound, which are at least sufficient to put into solution the uranium which was not dissolved in the first step, and while maintaining the suspension in an agitated condition; and(b) the uranyl nitrate is extracted by bringing into contact the aqueous medium resulting from the dissolution of UF.sub.4 and the uranyl nitrate extraction solvent containing the phosphoric ester.
摘要翻译： 一种制备有用产物的方法，其中包含在从磷酸中回收铀所产生的不纯的四氟化铀中的铀和稀土，包括在铝化合物的存在下将其溶解在硝酸介质中的热条件下，将所得溶液 用用于提取含有磷酸酯的硝酸铀酰的溶剂，并从其中除去铀的水相中分离出溶剂，其中加入硝酸铀酰以制成有用的产物，其规定为了 从硝酸铀酰提取溶剂中实现容易地分离从其中除去铀的水相;（a）UF4的溶解操作在合适的温度下分两步进行，第一步包括引入不足量的 硝酸和铝化合物完全溶解不纯的四氟化铀，并保持所得的悬浮液 n处于搅拌条件下至少0.5小时的时间段，第二步骤包括将硝酸和铝化合物的量加入至少足以使溶解在第一步骤中不溶解的铀的溶液中 同时在悬浮状态下保持悬浮状态; 和（b）通过与UF4的溶解和含有磷酸酯的硝酸铀酰硝酸盐提取溶剂接触而引起的硝酸铀酰被提取。
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9.发明授权
公开(公告)号：US4510122A
公开(公告)日：1985-04-09
申请号：US511478
申请日：1983-07-07
申请人： Antoine Floreancig
发明人： Antoine Floreancig
CPC分类号： C22B60/026
摘要： A process for extracting the uranium contained in phosphoric acid solutions by means of an extracting agent comprising an alkylpyrophosphoric acid, which comprises bringing into contact, in an agitated condition, the inorganic, phosphoric acid phase and an organic phase containing the extracting agent, thereby producing an emulsion, which is characterized in that, in an extraction unit comprising n stages in a cascade configuration, for each extraction stage, the emulsion is produced in a first step by simultaneously subjecting the two phases for a period of time T.sub.1 to an intense mechanical shearing action corresponding to a shearing coefficient of at least 5000 seconds.sup.-1 in order to multiply the contact surfaces for contact between said two phases, and then said emulsion in a second step is abruptly broke in a time T.sub.2, the sum of the times required for carrying out the two steps being at most 20 minutes.
摘要翻译： 一种通过包含烷基焦磷酸的提取剂提取磷酸溶液中所含的铀的方法，其包括在搅拌条件下使无机磷酸相和含有萃取剂的有机相接触，由此产生 一种乳液，其特征在于，在包括级联构型的n级的萃取单元中，对于每个萃取阶段，在第一步中通过将两相经过一段时间T1同时进行强力机械 对应于至少5000秒-1的剪切系数的剪切动作，以便使所述两相之间的接触的接触面倍增，然后在第二步骤中的所述乳液在时间T2内突然断裂，所需时间的总和 执行两个步骤至多20分钟。
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公开(公告)号：US4169880A
公开(公告)日：1979-10-02
申请号：US845606
申请日：1977-10-26
摘要： Processes for treating nitric effluents from plants so that a non-polluting stream is obtained and nitric values are recovered, which processes comprise acidifying nitric effluent, liquid-liquid extraction of the acidified effluent with an extraction agent comprising a neutral phosphoric ester and at least one long-chain alkylamine, and re-extraction of the loaded extraction agent with ammonia, thereby regenerating the extraction agent and providing ammonium nitrate, while at the same time providing a substantially nitric-free effluent.
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