Patents by Inventor Hideki Ohara
Hideki Ohara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240279106Abstract: A quartz glass crucible includes a crucible base body having silica glass and a coating film containing a crystallization accelerator and formed on the inner surface of the crucible base body. The coating film has a peel strength of 0.3 kN/m or more.Type: ApplicationFiled: February 9, 2022Publication date: August 22, 2024Applicant: SUMCO CorporationInventors: Masami OHARA, Hiroshi KISHI, Eriko KITAHARA, Hideki FUJIWARA
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Publication number: 20240254651Abstract: A quartz glass crucible includes a crucible base body including silica glass and a coating film containing a crystallization accelerator and formed on the inner surface of the crucible base body. The average carbon concentration in the coating film, and the crucible base body within a range of 0 ?m or more and 300 ?m or less in depth from the inner surface of the crucible base body is 1.0×1012 atoms/cc or more and 3.0×1019 atoms/cc or less.Type: ApplicationFiled: February 9, 2022Publication date: August 1, 2024Applicant: SUMCO CorporationInventors: Masami OHARA, Hiroshi KISHI, Eriko KITAHARA, Hideki FUJIWARA
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Patent number: 12049777Abstract: An opening-closing member controller includes a control unit that executes an initialization process to store at least a fully closed position of an opening-closing member. In the initialization process, the control unit closes the opening-closing member, executes entrapment reversing control one or more times when entrapment is detected to open the opening-closing member, and closes the opening-closing member after the entrapment reversing control to store a position where the opening-closing member locks as the fully closed position.Type: GrantFiled: June 16, 2020Date of Patent: July 30, 2024Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Aoshima, Akiyoshi Ohara, Ryo Miyazaki, Kenji Kaneko, Tsuyoshi Sugimoto, Toshihiro Gotou, Hideki Maeda
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Publication number: 20240228320Abstract: Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate.Type: ApplicationFiled: January 20, 2022Publication date: July 11, 2024Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki OHARA, Keiji KUDOU, Tatsuya HIGAKI, Hiroto WATANABE, Natsuki KONDOU, Takashi KANEKO, Shin-ichi HEGURI
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Publication number: 20230183091Abstract: Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate.Type: ApplicationFiled: January 6, 2022Publication date: June 15, 2023Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Hiroto WATANABE, Hideki OHARA, Keiji KUDOU, Takashi KANEKO, Tatsuya HIGAKI, Natsuki KONDOU, Shin-ichi HEGURI
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Publication number: 20220154308Abstract: A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obType: ApplicationFiled: March 16, 2020Publication date: May 19, 2022Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki Ohara, Shota Sanjo, Masatoshi Takano, Satoshi Asano, Hiroshi Kobayashi, Yusuke Senba, Hiroto Watanabe
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Publication number: 20210039011Abstract: Provided is a solvent extraction method that allows selectively separating magnesium from an acidic aqueous solution of sulfuric acid. The solvent extraction method includes: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by diluting an extractant made of alkylphosphonic acid ester with a diluent. A concentration of the extractant is set to 40 volume % or more and 60 volume % or less and a pH of the acidic aqueous solution of sulfuric acid is set to 1.5 or more and 2.0 or less, or the concentration of the extractant is set to 20 volume % or more and 50 volume % or less and the pH of the acidic aqueous solution of sulfuric acid is set to 2.0 or more and 2.5 or less.Type: ApplicationFiled: November 21, 2018Publication date: February 11, 2021Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki OHARA, Satoshi ASANO, Hiroshi KOBAYASHI, Masatoshi TAKANO, Shota SANJO
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Patent number: 10766072Abstract: Provided is a method for producing high density nickel powder particularly having a median diameter of 100 to 160 ?m by controlling a particle size of nickel powder. The method includes: performing an initial operation by charging a pressure vessel equipped with a stirrer with a nickel ammine complex solution containing nickel in the concentration of 5 to 75 g/L together with seed crystals in the amount of 5 to 200 g per liter of the solution, increasing the temperature of the solution, and performing a reduction reaction with hydrogen by blowing hydrogen gas into the pressure vessel, thereby obtaining the nickel contained in the nickel ammine complex solution as nickel powder; and thereafter, performing a specified operation A repeatedly at least once to obtain the nickel powder having the median diameter of 100 to 160 ?m and a bulk density of 1 to 4.5 g/cm3.Type: GrantFiled: October 25, 2016Date of Patent: September 8, 2020Assignee: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki Ohara, Yoshitomo Ozaki, Shin-ichi Heguri, Kazuyuki Takaishi, Osamu Ikeda, Tomoaki Yoneyama, Yohei Kudo
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Patent number: 10577255Abstract: Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid solution in parallel. In the first step, the sulfuric acid solution is subjected to solvent extraction by an extractant, thereby obtaining a first organic solvent after extraction. In the second step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant.Type: GrantFiled: September 1, 2017Date of Patent: March 3, 2020Assignee: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki Ohara, Toshirou Tan, Masatoshi Takano, Satoshi Asano, Hiroshi Kobayashi
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Patent number: 10549351Abstract: A method for producing nickel powder sequentially includes: a mixing step of adding, to a nickel ammine sulfate complex solution, an insoluble solid as seed crystals and a polyacrylate or lignosulfonate as a dispersant to form a mixed slurry; and a reduction and precipitation step of charging a reaction vessel with the mixed slurry and blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the mixed slurry to form nickel precipitate on the surface of the insoluble solid, wherein the amount of the dispersant added in the mixing step is controlled to control the number of the nickel powder obtained by formation of the nickel precipitate in the reduction and precipitation step.Type: GrantFiled: March 26, 2015Date of Patent: February 4, 2020Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Shin-ichi Heguri, Yoshitomo Ozaki, Kazuyuki Takaishi, Tomoaki Yoneyama, Hideki Ohara, Osamu Ikeda, Yohei Kudo
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Patent number: 10500644Abstract: Provided a production method for reducing the content level of sulfur and carbon which are impurities in nickel powder to improve the quality of nickel powder produced by a complexing reduction method. The method of producing nickel powder having low carbon and sulfur concentrations includes: a complexing treatment of adding a complexing agent to a nickel sulfate aqueous solution to form a solution containing nickel complex ions; maintaining the solution containing nickel complex ions at a solution temperature of 150 to 250° C. in a pressure vessel and blowing hydrogen gas into the solution containing nickel complex ions to perform hydrogen reduction to produce nickel powder; washing the nickel powder with water; and then roasting the nickel powder washed with water in a mixed gas atmosphere of nitrogen and hydrogen.Type: GrantFiled: April 13, 2015Date of Patent: December 10, 2019Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Yoshitomo Ozaki, Shin-ichi Heguri, Kazuyuki Takaishi, Osamu Ikeda, Hideki Ohara, Tomoaki Yoneyama, Yohei Kudo
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Patent number: 10501334Abstract: An aqueous cobalt chloride solution refinement method, in which metallic nickel is washed with an acidic liquid having a pH of not more than 2.5 before the metallic nickel is brought into contact with the aqueous solution containing cobalt chloride. Since the metallic nickel is washed with the acidic liquid having a pH of not more than 2.5, a passive film on a surface of the metallic nickel is removed and therefore, when the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, an impurity more noble than the metallic nickel can be precipitated by a cementation reaction. In addition, since the metallic nickel is only washed with acid to be brought into contact with the aqueous solution containing cobalt chloride, impurities can be easily removed from the aqueous solution containing cobalt chloride.Type: GrantFiled: May 20, 2016Date of Patent: December 10, 2019Assignee: SUMITOMO METAL MINING CO., LTD.Inventors: Hideki Ohara, Satoshi Asano, Toshirou Tan, Masatoshi Takano
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Patent number: 10471514Abstract: Provided is an efficient method for producing nickel powder from a solution containing a nickel ammine complex, the method including adding seed crystals to a solution containing a nickel ammine complex and subjecting the resulting mixture to hydrogen reduction under high temperatures and high pressures to produce nickel powder, which makes it possible to maintain the quality of the nickel powder produced and reduce the amount of the seed crystals used. The method for producing nickel powder is characterized by adding seed crystals and a dispersant having an anionic functional group to the solution containing a nickel ammine complex to form a mixture slurry, and subjecting the mixture slurry to pressurized hydrogen reduction treatment by blowing hydrogen into the mixture slurry in a high temperature and high pressure atmosphere to cause a reduction reaction, thereby reducing the nickel ammine complex in the mixture slurry to obtain nickel powder.Type: GrantFiled: February 9, 2015Date of Patent: November 12, 2019Assignees: KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sumitomo Metal Mining Co., Ltd.Inventors: Kazumichi Yanagisawa, Junhao Zhang, Osamu Ikeda, Hideki Ohara, Tomoaki Yoneyama, Yohei Kudo, Shin-ichi Heguri
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Patent number: 10434577Abstract: Provided is nickel powder obtained by adding seed crystals to a nickel ammine complex solution and performing hydrogen reduction reaction under high temperatures and high pressures, wherein the nickel powder does not produce dust during handling, and a container can be efficiently filled with the nickel powder. The method for producing nickel powder includes: adding seed crystals and a surfactant having a nonionic or anionic functional group to a solution containing a nickel ammine complex to forma mixed slurry; and subjecting the mixed slurry to hydrogen reduction under high temperature and high pressure conditions in a pressure vessel to obtain nickel powder from the mixed slurry.Type: GrantFiled: March 24, 2015Date of Patent: October 8, 2019Assignees: KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SUMITOMO METAL MINING CO., LTD.Inventors: Kazumichi Yanagisawa, Junhao Zhang, Kazuyuki Takaishi, Tomoaki Yoneyama, Shin-ichi Heguri, Hideki Ohara, Osamu Ikeda, Yohei Kudo, Yoshitomo Ozaki
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Publication number: 20190194031Abstract: Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid solution in parallel. In the first step, the sulfuric acid solution is subjected to solvent extraction by an extractant, thereby obtaining a first organic solvent after extraction In the second step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant.Type: ApplicationFiled: September 1, 2017Publication date: June 27, 2019Inventors: Hideki Ohara, Toshirou Tan, Masatoshi Takano, Satoshi Asano, Hiroshi Kobayashi
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Patent number: 10239764Abstract: An aqueous cobalt chloride solution purification method, in which impurities can be efficiently removed from a cobalt salt solution, includes bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a substitution reaction, in which the pH of the aqueous solution containing cobalt chloride is adjusted to not less than 1.5 and not more than 2.5. Since the pH of the aqueous solution containing cobalt chloride is adjusted to not less than 1.5 and not more than 2.5, a passive film on a surface of the metallic nickel can be effectively removed, and the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, so that an impurity more noble than the metallic nickel can be precipitated by the substitution reaction. The metallic nickel is only brought into contact with the aqueous solution containing cobalt chloride, and the impurity can be easily removed.Type: GrantFiled: May 20, 2016Date of Patent: March 26, 2019Assignee: SUMITOMO METAL MINING CO., LTD.Inventors: Toshirou Tan, Masatoshi Takano, Hideki Ohara, Satoshi Asano
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Patent number: 10220446Abstract: Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially comprises: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.Type: GrantFiled: February 17, 2015Date of Patent: March 5, 2019Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Kazumichi Yanagisawa, Junhao Zhang, Shin-ichi Heguri, Yoshitomo Ozaki, Kazuyuki Takaishi, Hideki Ohara, Tomoaki Yoneyama, Osamu Ikeda, Yohei Kudo
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Publication number: 20190054541Abstract: Provided is a method for producing high density nickel powder particularly having a median diameter of 100 to 160 ?m by controlling a particle size of nickel powder. The method includes: performing an initial operation by charging a pressure vessel equipped with a stirrer with a nickel ammine complex solution containing nickel in the concentration of 5 to 75 g/L together with seed crystals in the amount of 5 to 200 g per liter of the solution, increasing the temperature of the solution, and performing a reduction reaction with hydrogen by blowing hydrogen gas into the pressure vessel, thereby obtaining the nickel contained in the nickel ammine complex solution as nickel powder; and thereafter, performing a specified operation A repeatedly at least once to obtain the nickel powder having the median diameter of 100 to 160 ?m and a bulk density of 1 to 4.5 g/cm3.Type: ApplicationFiled: October 25, 2016Publication date: February 21, 2019Inventors: Hideki Ohara, Yoshitomo Ozaki, Shin-ichi Heguri, Kazuyuki Takaishi, Osamu Ikeda, Tomoaki Yoneyama, Yohei Kudo
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Patent number: 10118224Abstract: Provided is a method for producing nickel powder from a nickel ammine sulfate complex solution, comprising treatment steps of: (1) a seed crystal production step of producing nickel powder having an average particle size of 0.1 to 5 ?m; (2) a seed crystal addition step of adding the nickel powder obtained in the step (1) as seed crystals to form a mixed slurry; (3) a reduction step of forming a reduced slurry containing nickel powder formed by precipitation of a nickel component in the mixed slurry on the seed crystals; and (4) a growth step of performing solid-liquid separation to separate and recover the nickel powder as a solid phase component and then blowing hydrogen gas into a solution prepared by adding the nickel ammine sulfate complex solution to the recovered nickel powder to grow the nickel powder to form high purity nickel powder.Type: GrantFiled: January 27, 2015Date of Patent: November 6, 2018Assignees: KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SUMITOMO METAL MINING CO., LTD.Inventors: Kazumichi Yanagisawa, Junhao Zhang, Shin-ichi Heguri, Hideki Ohara, Osamu Ikeda, Tomoaki Yoneyama, Yohei Kudo, Yoshitomo Ozaki
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Patent number: 10092955Abstract: Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially includes: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, a dispersant containing a sulfonate and an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.Type: GrantFiled: February 17, 2015Date of Patent: October 9, 2018Assignees: KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SUMITOMO METAL MINING CO., LTD.Inventors: Kazumichi Yanagisawa, Junhao Zhang, Shin-ichi Heguri, Yoshitomo Ozaki, Kazuyuki Takaishi, Hideki Ohara, Tomoaki Yoneyama, Osamu Ikeda, Yohei Kudo