Patents by Inventor Chang Youl Suh
Chang Youl Suh 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: 20220364203Abstract: The present invention relates to a method for recovering lithium from brine, and provides a method for recovering lithium from brine, the method comprising: (a) an impurity removal step of adding a carbonate supply source to brine including lithium, magnesium and calcium to precipitate and remove magnesium and calcium impurities; (b) a pH adjusting step of adding an acid to the brine from which the impurities have been removed, to adjust the pH of the brine; (c) a lithium-aluminum compound recovery step of adding an aluminum supply source to the pH-adjusted brine to recover a lithium-aluminum compound; (d) a lithium sulfate and aluminum oxide formation step of adding the lithium-aluminum compound to a sulfur supply source and calcining same to form lithium sulfate and aluminum oxide; and (e) a lithium sulfate solution yield step of selectively dissolving lithium sulfate from among the formed lithium sulfate and aluminum oxide to yield a lithium sulfate solution.Type: ApplicationFiled: May 29, 2020Publication date: November 17, 2022Applicant: Korea Institute Of Geoscience And Mineral ResourcesInventors: In Su PARK, Hye-Jin HONG, Chang-Youl SUH, Sukjoon PARK, Myunggyu LEE
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Patent number: 10161017Abstract: Provided are a method for crushing hard tungsten carbide (WC) scraps which is a pre-step of alkaline leaching and acid leaching processes for recycling of tungsten and cobalt, the method including mixing hard tungsten carbide (WC) scraps such as chips, wires, bolts, drills, etc., that are metalworking tools to be discarded after being used, with aluminum, followed by heating to a high temperature, to form an intermetallic compound, metal oxides, or mixtures thereof in a sponge form, and crushing the intermetallic compound, the metal oxides, or the mixtures thereof in a sponge form. Further, provided is a method for recovering tungsten and cobalt from hard tungsten carbide (WC) scrap powder through alkaline leaching and acid leaching methods.Type: GrantFiled: May 17, 2016Date of Patent: December 25, 2018Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCESInventors: Byung-Su Kim, Hanjung Kwon, Ki-Min Roh, Chang-Youl Suh, Ji-Hyuk Choi
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Publication number: 20160355907Abstract: Provided are a method for crushing hard tungsten carbide (WC) scraps which is a pre-step of alkaline leaching and acid leaching processes for recycling of tungsten and cobalt, the method including mixing hard tungsten carbide (WC) scraps such as chips, wires, bolts, drills, etc., that are metalworking tools to be discarded after being used, with aluminum, followed by heating to a high temperature, to form an intermetallic compound, metal oxides, or mixtures thereof in a sponge form, and crushing the intermetallic compound, the metal oxides, or the mixtures thereof in a sponge form.Type: ApplicationFiled: May 17, 2016Publication date: December 8, 2016Inventors: Byung-Su KIM, Hanjung KWON, Ki-Min ROH, Chang-Youl SUH, Ji-Hyuk CHOI
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Patent number: 8986603Abstract: Disclosed is an apparatus for producing low oxygen-content molybdenum powders by reducing MoO3. The apparatus includes a body, a cover to close an upper end of the body, a joint to couple the body with the cover, a bracket located in the body, and a micro-sieve located on an upper portion of the bracket. Metal Mo powders having the oxygen content of 3,000 ppm are obtained by using the apparatus for producing low oxygen-content molybdenum powders by reducing MoO3.Type: GrantFiled: November 13, 2013Date of Patent: March 24, 2015Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Hyung-Seok Kim, Jung-Min Oh, Chang-Youl Suh, Back-Kyu Lee, Jae-Won Lim
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Patent number: 8979975Abstract: Disclosed is a method of producing low oxygen-content molybdenum powders by reducing molybdenum trioxide, which includes charging a first reducing agent and the molybdenum trioxide, which are in the direct contact with each other on a micro-sieve on an upper portion of a bracket in a body, charging a second reducing agent in the bracket under the micro-sieve, coupling the body with a cover to close the body, and performing a reduction reaction by raising an internal temperature of the body by performing the first reduction reaction due to direct contact between the first reducing agent and the molybdenum trioxide, and performing the second reduction reaction due to evaporation of the second reducing agent. The first and second reduction reactions are performed at a temperature in a range of 550° C. to 650° C., and a temperature in a range of 1000° C. to 1200° C., respectively.Type: GrantFiled: November 13, 2013Date of Patent: March 17, 2015Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Hyung-Seok Kim, Jung-Min Oh, Chang-Youl Suh, Back-Kyu Lee, Jae-Won Lim
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Publication number: 20140151944Abstract: Disclosed is an apparatus for producing low oxygen-content molybdenum powders by reducing MoO3. The apparatus includes a body, a cover to close an upper end of the body, a joint to couple the body with the cover, a bracket located in the body, and a micro-sieve located on an upper portion of the bracket. Metal Mo powders having the oxygen content of 3,000 ppm are obtained by using the apparatus for producing low oxygen-content molybdenum powders by reducing MoO3.Type: ApplicationFiled: November 13, 2013Publication date: June 5, 2014Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCESInventors: Hyung-Seok KIM, Jung-Min Oh, Chang-Youl Suh, Back-Kyu Lee, Jae-Won Lim
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Publication number: 20140144291Abstract: Disclosed is a method of producing low oxygen-content molybdenum powders by reducing molybdenum trioxide, which includes charging a first reducing agent and the molybdenum trioxide, which are in the direct contact with each other on a micro-sieve on an upper portion of a bracket in a body, charging a second reducing agent in the bracket under the micro-sieve, coupling the body with a cover to close the body, and performing a reduction reaction by raising an internal temperature of the body by performing the first reduction reaction due to direct contact between the first reducing agent and the molybdenum trioxide, and performing the second reduction reaction due to evaporation of the second reducing agent. The first and second reduction reactions are performed at a temperature in a range of 550° C. to 650° C., and a temperature in a range of 1000° C. to 1200° C., respectively.Type: ApplicationFiled: November 13, 2013Publication date: May 29, 2014Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCESInventors: Hyung-Seok KIM, Jung-Min Oh, Chang-Youl Suh, Back-Kyu Lee, Jae-Won Lim
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Patent number: 8449646Abstract: Disclosed is a method for preparing low-oxygen titanium powders. The method includes (a) separately placing titanium base powders and calcium in a deoxidation container, (b) deoxidizing the titanium base powders by heating an inner part of the deoxidation container at a temperature of 850° C. to 1050° C. so that the calcium is evaporated to make contact with the titanium base powders, (c) removing calcium oxide from surfaces of titanium powders, which are obtained by deoxidizing the titanium base powders in step (b), by washing the titanium powders, and (d) drying the titanium powders subject to the removing of the calcium oxide in step (c).Type: GrantFiled: July 17, 2012Date of Patent: May 28, 2013Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Jae-Won Lim, Jung-Min Oh, Back-Kyu Lee, Chang-Youl Suh, Sung-Wook Cho
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Patent number: 8449813Abstract: Disclosed is a deoxidation apparatus for preparing low-oxygen titanium powders. The deoxidation apparatus includes a lower container having an open upper portion and storing an deoxidizer representing an oxygen degree higher than an oxygen degree of titanium and a melting temperature lower than a melting temperature of titanium, and an upper container coupled with the lower container on the lower container and storing titanium base powders. The upper container is provided at a lower surface thereof with a sieve, and allows the deoxidizer, which is evaporated due to heating, to make contact with the titanium base powders so that the titanium base powders are deoxidized.Type: GrantFiled: July 17, 2012Date of Patent: May 28, 2013Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Jae-Won Lim, Jung-Min Oh, Back-Kyu Lee, Chang-Youl Suh, Sung-Wook Cho
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Publication number: 20130127097Abstract: Disclosed is a deoxidation apparatus for preparing low-oxygen titanium powders. The deoxidation apparatus includes a lower container having an open upper portion and storing an deoxidizer representing an oxygen degree higher than an oxygen degree of titanium and a melting temperature lower than a melting temperature of titanium, and an upper container coupled with the lower container on the lower container and storing titanium base powders. The upper container is provided at a lower surface thereof with a sieve, and allows the deoxidizer, which is evaporated due to heating, to make contact with the titanium base powders so that the titanium base powders are deoxidized.Type: ApplicationFiled: July 17, 2012Publication date: May 23, 2013Inventors: Jae-Won LIM, Jung-Min OH, Back-Kyu LEE, Chang-Youl SUH, Sung-Wook CHO
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Publication number: 20130125706Abstract: Disclosed is a method for preparing low-oxygen titanium powders. The method includes (a) separately placing titanium base powders and calcium in a deoxidation container, (b) deoxidizing the titanium base powders by heating an inner part of the deoxidation container at a temperature of 850° C. to 1050° C. so that the calcium is evaporated to make contact with the titanium base powders, (c) removing calcium oxide from surfaces of titanium powders, which are obtained by deoxidizing the titanium base powders in step (b), by washing the titanium powders, and (d) drying the titanium powders subject to the removing of the calcium oxide in step (c).Type: ApplicationFiled: July 17, 2012Publication date: May 23, 2013Inventors: Jae-Won LIM, Jung-Min OH, Back-Kyu LEE, Chang-Youl SUH, Sung-Wook CHO
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Patent number: 8268034Abstract: Provided is a manufacturing method of ferromolybdenum from molybdenite concentrate, and more particularly, a manufacturing method of ferromolybdenum with copper content of 0.5% or less from molybdenite with high copper content without carrying out a separate copper removing process by putting molybdenite, aluminum metal and iron metal, in a heating furnace and reacting them at high temperature to manufacture the ferro molybdenum at the lower portion thereof, forming a slag using aluminum sulfide and iron sulfide as the main components at the upper portion thereof, and putting most of the copper (80 to 95%) existing in the molybdenite in a slag layer. The exemplary embodiment can shorten a process as compared to a metallothermic reduction (Thermit) method of the related art and reduce the consumption of a reducing agent, i.e., aluminum.Type: GrantFiled: October 20, 2010Date of Patent: September 18, 2012Assignee: Korea Institute of Geoscience and Mineral Resources (KIGAM)Inventors: Young Yoon Choi, Sang Bae Kim, Chang Youl Suh, Chul Woo Nam
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Publication number: 20120174709Abstract: Provided is a manufacturing method of ferromolybdenum from molybdenite concentrate, and more particularly, a manufacturing method of ferromolybdenum with copper content of 0.5% or less from molybdenite with high copper content without carrying out a separate copper removing process by putting molybdenite, aluminum metal and iron metal, in a heating furnace and reacting them at high temperature to manufacture the ferro molybdenum at the lower portion thereof, forming a slag using aluminum sulfide and iron sulfide as the main components at the upper portion thereof, and putting most of the copper (80 to 95%) existing in the molybdenite in a slag layer. The exemplary embodiment can shorten a process as compared to a metallothermic reduction (Thermit) method of the related art and reduce the consumption of a reducing agent, i.e., aluminum.Type: ApplicationFiled: October 20, 2010Publication date: July 12, 2012Applicant: Korea Institute of Geoscience and Mineral Resources (KIGAM)Inventors: Young Yoon Choi, Sang Bae Kim, Chang Youl Suh, Chul Woo Nam
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Publication number: 20070209477Abstract: A method for manufacturing alloy nanopowders is disclosed, which comprises a step in which a wire manufactured in such a manner that at least one hetero metal is coated on a metallic wire is used to manufacture alloy nanopowders. At least one hetero metal is coated on a pure metal wire or an alloy wire based on an electroplating method, an electroless plating or other methods. The alloy wire is electrically exploded for thereby manufacturing at least two-component alloy nanopowder.Type: ApplicationFiled: May 4, 2006Publication date: September 13, 2007Inventors: Won-Baek Kim, Je-Shin Park, Chang-Youl Suh, Dae-Sup Kil, Jae-Chun Lee