公开(公告)号：US4925537A

公开(公告)日：1990-05-15

申请号：US330893

申请日：1989-03-31

申请人： Tomoo Kirihara ,  Ippei Nakagawa ,  Yoshinobu Seki ,  Yutaka Honda ,  Yasuo Ichihara

发明人： Tomoo Kirihara ,  Ippei Nakagawa ,  Yoshinobu Seki ,  Yutaka Honda ,  Yasuo Ichihara

IPC分类号： C25B1/26 ,  B01D7/00 ,  C01G25/04 ,  C01G27/04 ,  C25B11/12

CPC分类号： C01G27/04 ,  C01G25/04

摘要： A process for separation of hafnium tetrachloride from zirconium tetrachloride and electrode is disclosed. Zirconium tetrachloride containing hafnium tetrachloride in natural ratio dissolved in a molten salt is reduced in the first phase electrolysis using an anode composed of a substance formed by firing a mixture of more than one kind of compound selected from the group consisting of silica, silicate containing zirconium or zirconium oxide and carbon with a binder under maintenance of an initial concentration of the zirconium tetrachloride in order to produce zirconium trichloride containing a hafnium content lower than that of the zirconium tetrachloride at a cathode. Next, by using the former cathode as an anode and another cathode in the second phase electrolysis the zirconium tetrachloride is further reduced to yield zirconium trichloride of a lower hafnium content at another cathode and evolve on the anode gaseous zirconium tetrachloride having a high pressure by oxidizing the zirconium trichloride produced in the first phase electrolysis. The evolved zirconium tetrachloride is recovered as zirconium tetrachloride with a low hafnium content. Further, the zirconium tetrachloride with a low hafnium content and the zirconium trichloride with a lower hafnium content are produced by exchanging polarities of the cathode and the anode when the zirconium trichloride on the anode decreases. The second phase electrolysis is carried out repeatedly. After hafnium tetrachloride is concentrated to an expected value in the molten salt in the above mentioned electrolysis, the molten salt is transferred to a separate vessel and is heated to evaporate the tetrachloride highly concentrated hafnium. Thus, zirconium tetrachloride and hafnium tetracholoride are respectively separated with high efficiency. A hafnium content of zirconium tetrachloride separated is able to reduce to less than 100 ppm, and a zirconium content of hafnium tetrachloride separated is also reduced to less than 25 wt %.

公开(公告)号：US5019333A

公开(公告)日：1991-05-28

申请号：US419139

申请日：1989-10-10

申请人： Takeshi Isobe ,  Yutaka Matsuo ,  Yasuo Ichihara

发明人： Takeshi Isobe ,  Yutaka Matsuo ,  Yasuo Ichihara

IPC分类号： C22C16/00 ,  G21C3/07 ,  G21C3/34

CPC分类号： C22C16/00 ,  G21C3/07 ,  G21C3/34 ,  Y02E30/40 ,  Y10S376/90

摘要： A zirconium alloy for use in spacer grids for nuclear reactor fuel claddings, which consists essentially of, on a weight percent basis,2.5 to 10% Nb,0.01 to 1.5% of one or more components selected from the group consisting of Y and rare earth elements and oxides thereof,0.05 to 1% of one or more optional element selected from the group consisting of Fe, Cr, Mo and V, andthe remainder Zr and incidental impurities.

摘要翻译： 一种用于核反应堆燃料包层的间隔栅格的锆合金，其基本上由以重量百分数计，2.5至10％的Nb，0.01至1.5％的选自Y和稀土的一种或多种组分 元素和氧化物，0.05-1％选自Fe，Cr，Mo和V的一种或多种任选元素，余量为Zr和附带杂质。

公开(公告)号：US5009751A

公开(公告)日：1991-04-23

申请号：US293791

申请日：1989-01-05

申请人： Tomoo Kirihara ,  Ippei Nakagawa ,  Yoshinobu Seki ,  Yutaka Honda ,  Yasuo Ichihara

发明人： Tomoo Kirihara ,  Ippei Nakagawa ,  Yoshinobu Seki ,  Yutaka Honda ,  Yasuo Ichihara

IPC分类号： C01G25/04 ,  C01G27/04

CPC分类号： C01G25/04 ,  C01G27/04

摘要： Separation of hafnium tetrachloride from zirconium tetrachloride by introducing zirconium tetrachloride containing about 2-4 wt percent of hafnium tetrachloride into an electrolytic cell filled with a molten salt and dissolving it to make an electrolytic bath. Running first phase electrolysis which produces zirconium trichloride containing a lower hafnium content than the dissolved zirconium tetrachloride at the cathode. Running second phase electrolysis using the first cathode, but switching the first cathode to become an anode and using a second cathode. Producing zirconium trichloride of a lower hafnium content than the dissolved zirconium tetrachloride at the second cathode. Evolving a gaseous zirconium trichloride at the anode by electrolytic oxidation of the zirconium trichloride produced in the first phase electrolysis. Recovering this evolved zirconium tetrachloride which has a lower hafnium content than the dissolved zirconium tetrachloride and the zirconium trichloride produced at the cathodes. Continuing this second phase electrolysis by changing over polarities of the cathode and the anode, when the concentration of zinc trichloride at the anode decreases to a predetermined concentration when the vapor pressure valve of hafnium tetrachloride, which has become concentrated in the electrolytic bath reaches about 1/10 of that of zirconium tetrachloride in the electrolytic bath. Transferring the hafnium enriched electrolytic bath to a separate vessel and separating it from the molten salt by raising the temperature of the electrolytic bath to a predetermined temperature.

摘要翻译： 通过将含有约2-4重量％的四氯化铪的四氯化锆引入填充有熔融盐的电解槽中并溶解以形成电解浴，从而将四氯化铪与四氯化锆分离。 运行第一相电解，其产生在阴极处含有比溶解的四氯化锆低的铪含量的三氯化锆。 使用第一阴极运行第二相电解，但是将第一阴极切换成阳极并使用第二阴极。 在第二阴极处产生比溶解的四氯化锆低的铪含量的三氯化锆。 通过在第一相电解中产生的三氯化锆的电解氧化在阳极上演化气态三氯化锆。 回收这种形成的四氯化锆，其具有比溶解的四氯化锆低的铪含量和在阴极产生的三氯化锆。 通过改变阴极和阳极的极性继续进行该第二阶段的电解，当浓度在电解槽中的四氯化铪的蒸汽压力阀达到约1时，阳极下的三氯化锌浓度降低到预定浓度 / 10的电解槽中的四氯化锆。 将富含铪的电解槽转移到单独的容器中，并通过将电解浴的温度升高到预定温度将其与熔融盐分离。