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1. 发明授权

US4925537A Process for separation of hafnium tetrachloride from zirconium tetrachloride and electrode 失效
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 %.

2. 外观设计

USD633991S1 Gate valve seal 有权
标题翻译：闸阀密封
公开(公告)号：USD633991S1
公开(公告)日：2011-03-08
申请号：US29337562
申请日：2009-05-26
申请人： Ippei Nakagawa
设计人： Ippei Nakagawa

3. 发明授权

US4857155A Process of separation of hafnium from zirconium by molten salt electrolysis 失效
标题翻译：通过熔融盐电解将铪与锆分离
公开(公告)号：US4857155A
公开(公告)日：1989-08-15
申请号：US195623
申请日：1988-05-17
申请人： Tomoo Kirihara , Ippei Nakagawa , Yoshinobu Seki , Yutaka Honda
发明人： Tomoo Kirihara , Ippei Nakagawa , Yoshinobu Seki , Yutaka Honda
IPC分类号： C25B1/00 , B01D7/00 , C01G25/04 , C01G27/04 , C25B1/26
CPC分类号： C01G25/04 , C01G27/04
摘要： A process of separation of hafnium from zirconium by molten salt electrolysis in which zirconium tetrachloride with ordinary hafnium tetrachloride content is dissolved in a molten salt and the zirconium tetrachloride is electrolytically reduced to zirconium trichloride with lower hafnium content at a cathode in the molten salt and hafnium tetrachloride is remained. Next, the cathode on which the zirconium trichloride is formed by the cathode reaction is used as an anode. The electrolytic reduction of zirconium tetrachloride at another cathode in the molten salt is carried out and at the same time the zirconium trichloride formed on the anode is oxidized to zirconium tetrachloride with a low hafnium content and the zirconium tetrachloride is evaporated for separation. The obtained zirconium tetrachloride containing a low hafnium content is suitable for production of reactor grade zirconium containing about 100 ppm of hafnium.
摘要翻译：通过熔融盐电解将熔融盐电解中的铪与锆分离的方法，其中将熔融盐溶解四氯化锆的四氯化钛溶解在熔融盐中，四氯化锆在熔融盐和铪中的阴极电解还原为具有较低铪含量的三氯化锆四氯化碳仍然存在。接下来，使用通过阴极反应形成三氯化锆的阴极作为阳极。在熔盐中的另一个阴极处进行四氯化锆的电解还原，同时在阳极上形成的三氯化锆被氧化成具有低铪含量的四氯化锆，并将四氯化锆蒸发分离。得到的含有低铪含量的四氯化锆适用于生产含有约100ppm铪的反应器级锆。

4. 发明授权

US5009751A Process for separation of hafnium tetrachloride from zirconium tetrachloride 失效
标题翻译：四氯化铪与四氯化锆的分离方法
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。

5. 发明授权

US4873073A Method for production of bismuth (III) oxide 失效
标题翻译：氧化铋（III）的生产方法
公开(公告)号：US4873073A
公开(公告)日：1989-10-10
申请号：US319756
申请日：1989-03-07
申请人： Haruo Matsui , Ippei Nakagawa , Kiyotaka Kato
发明人： Haruo Matsui , Ippei Nakagawa , Kiyotaka Kato
IPC分类号： C01G29/00
CPC分类号： C01G29/00 , C01P2002/88 , C01P2004/03 , C01P2004/32 , C01P2004/52 , C01P2004/62
摘要： Minute spherical bismuth (III) oxide particles are produced by adding a monocarboxylic acid to an aqueous solution containing trivalent bismuth ions thereby inducing formation of a bismuth-monocarboxylic acid complex in the aqueous solution, further adding an alkali to the aqueous solution thereby inducing precipitation of the complex, separating the precipitated complex from the solution, and firing the separated complex.
摘要翻译：通过向含有三价铋离子的水溶液中加入一元羧酸，从而在水溶液中引起铋 - 一元羧酸络合物的形成，进一步向该水溶液中加入碱，从而导致沉淀，从而产生微球状铋（III）该络合物将沉淀的络合物与溶液分离，并焙烧分离的络合物。

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