Patents by Inventor Yong Jae Suh
Yong Jae 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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Patent number: 9102555Abstract: The present invention provides a method for removing phosphorus and nitrogen contained in sewage or wastewater using iron ore wastewater. According to the method of the present invention, in which the phosphorus and nitrogen contained in sewage or wastewater are crystallized in the form of struvite using iron ore wastewater containing a large amount of Mg2+ produced in a process of upgrading low-grade iron ore and removed, it is possible to reduce the cost of Mg2+ and the cost of iron ore wastewater treatment, thereby earning economic profits. Moreover, it is possible to prevent water pollution by the removal of the phosphorus and nitrogen contained in sewage or wastewater. Furthermore, it is possible to use struvite crystals obtained as a by-product as a time-release compound fertilizer so as to reduce the amount of fertilizer used and the number of fertilizations, thereby reducing soil contamination.Type: GrantFiled: November 29, 2011Date of Patent: August 11, 2015Assignee: Korea Institute of Geosciences and Mineral ResourcesInventors: Yong Jae Suh, Myung Eun Ju, Dae Sup Kil, Hee Dong Jang
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Patent number: 8940179Abstract: The present invention relates to a method for preparing magnetite nanoparticles from low-grade iron ore using solvent extraction and magnetite nanoparticles prepared by the same. According to the method for magnetite nanoparticles from low-grade iron ore of the present invention, it is possible to prepare high-purity magnetite nanoparticles having a purity of 99% or higher by solvent extraction using low-grade iron ore as a starting material, and thus it is possible to reduce the processing cost and the amount of energy used, thus supplying a high-efficiency magnetite nanoparticle adsorbent, which can be industrially applied to wastewater treatment or desalination plant, in large quantities at low cost. In particular, it is possible to effectively treat livestock wastewater, heavy metal wastewater, oil discharged into rivers, etc. at low cost, thus significantly contributing to the prevention of environmental pollution.Type: GrantFiled: November 16, 2012Date of Patent: January 27, 2015Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Yong Jae Suh, Dae Sup Kil, Hee Dong Jang
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Patent number: 8815267Abstract: The present invention provides a hybrid powder of halloysite nanotubes and light-scattering nanoparticles, a method for preparing the same, and a UV-screening cosmetic composition containing the same as an active ingredient. The hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention, in which the light-scattering nanoparticles are loaded into the halloysite nanotubes, can prevent the light-scattering nanoparticles from penetrating the skin, which minimizes side effects, and has excellent UV-screening effect. Thus, the hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention can be effectively used as a UV-screening cosmetic composition.Type: GrantFiled: September 26, 2011Date of Patent: August 26, 2014Inventors: Yong Jae Suh, Myung Eun Ju, Dae Sup Kil, Sung Wook Cho
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Patent number: 8540957Abstract: The present invention provides a method for preparing microtubular halloysite nanopowders by cutting halloysite nanotubes at a high pressure, microtubular halloysite nanopowders prepared by the method, and a cosmetic composition comprising the microtubular halloysite nanopowders. According to the method of the present invention, it is possible to prepare the halloysite nanopowders with a tubular shape using natural halloysite and effectively select a halloysite nanopowder having a desired shape. The microtubular halloysite nanopowders can be used in many industrial fields and used as a container or a carrier for nanoparticles or organic materials such as drugs, air fresheners, cosmetics, agricultural chemical materials, etc.Type: GrantFiled: November 28, 2010Date of Patent: September 24, 2013Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Yong Jae Suh, Young Mi Heo, Dae Sup Kil, Sung Wook Cho
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Patent number: 8512672Abstract: Provided are a method for preparing zinc oxide (ZnO) nanoparticles and a method for preparing ZnO nanofluid using the same. The method for preparing ZnO nanoparticles includes: a) heating deionized water; b) dissolving zinc (Zn) salt in the deionized water to prepare a precursor solution; c) adding solid alkali salt to the precursor solution to prepare a dispersion of ZnO nanoparticles; and d) separating the ZnO nanoparticles by solid-liquid separation and washing them with deionized water. Highly pure, crystalline ZnO nanoparticles with spherical shape and very narrow particle size distribution of 10 to 50 nm can be prepared quickly and at large scale and low cost using inexpensive materials via a stable low-temperature process, without using a dispersant. The associated low-temperature, normal-pressure process produces few harmful materials and may be easily employed for production of ZnO nanoparticles.Type: GrantFiled: August 24, 2010Date of Patent: August 20, 2013Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Hyo-sook Lee, Yong Jae Suh, Dae Sup Kil, Kuk Cho
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Publication number: 20130105401Abstract: The present invention provides a method for removing phosphorus and nitrogen contained in sewage or wastewater using iron ore wastewater. According to the method of the present invention, in which the phosphorus and nitrogen contained in sewage or wastewater are crystallized in the form of struvite using iron ore wastewater containing a large amount of Mg2+ produced in a process of upgrading low-grade iron ore and removed, it is possible to reduce the cost of Mg2+ and the cost of iron ore wastewater treatment, thereby earning economic profits. Moreover, it is possible to prevent water pollution by the removal of the phosphorus and nitrogen contained in sewage or wastewater. Furthermore, it is possible to use struvite crystals obtained as a by-product as a time-release compound fertilizer so as to reduce the amount of fertilizer used and the number of fertilizations, thereby reducing soil contamination.Type: ApplicationFiled: November 29, 2011Publication date: May 2, 2013Inventors: Yong Jae Suh, Myung Eun Ju, Dae Sup Kil, Hee Dong Jang
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Publication number: 20130078293Abstract: The present invention provides a hybrid powder of halloysite nanotubes and light-scattering nanoparticles, a method for preparing the same, and a UV-screening cosmetic composition containing the same as an active ingredient. The hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention, in which the light-scattering nanoparticles are loaded into the halloysite nanotubes, can prevent the light-scattering nanoparticles from penetrating the skin, which minimizes side effects, and has excellent UV-screening effect. Thus, the hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention can be effectively used as a UV-screening cosmetic composition.Type: ApplicationFiled: September 26, 2011Publication date: March 28, 2013Inventors: Yong Jae Suh, Myung Eun Ju, Dae Sup Kil, Sung Wook Cho
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Patent number: 8337805Abstract: The present invention provides a method for preparing magnetite nanoparticles from low-grade iron ore and magnetite nanoparticles prepared by the same. According to the method of the present invention, in which iron ore leachate is obtained by adding low-grade iron ore powder to an acidic solution, Si and Mg that inhibit the formation of magnetite nanoparticles present in the leachate are selectively removed, iron hydroxide (Fe(OH)3) is allowed to be precipitated from a supernatant containing Fe2+ ions and Fe3+ ions, a mixed iron solution containing Fe2+ ions and Fe3+ ions is prepared using the iron hydroxide (Fe(OH)3), and the mixed iron solution is added to an alkaline solution to react, thereby preparing magnetite nanoparticles.Type: GrantFiled: November 29, 2011Date of Patent: December 25, 2012Assignee: Korea Institute of Geoscience and Mineral ResourcesInventors: Yong Jae Suh, Myung Eun Ju, Dae Sup Kil, Hee Dong Jang
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Publication number: 20120107214Abstract: The present invention provides a method for preparing microtubular halloysite nanopowders by cutting halloysite nanotubes at a high pressure, microtubular halloysite nanopowders prepared by the method, and a cosmetic composition comprising the microtubular halloysite nanopowders. According to the method of the present invention, it is possible to prepare the halloysite nanopowders with a tubular shape using natural halloysite and effectively select a halloysite nanopowder having a desired shape. The microtubular halloysite nanopowders can be used in many industrial fields and used as a container or a carrier for nanoparticles or organic materials such as drugs, air fresheners, cosmetics, agricultural chemical materials, etc.Type: ApplicationFiled: November 28, 2010Publication date: May 3, 2012Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCESInventors: Yong Jae SUH, Young Mi Heo, Dae Sup Kil, Sung Wook Cho
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Publication number: 20110230332Abstract: There is provided a method for manufacturing oligomer/halloysite composite material including the steps of: adding halloysite powder to an oligomer solution to be mixed; heating the mixed material to expand air inside of halloysite nanotube; and filling the oligomer solution inside of the halloysite nanotube by cooling the mixed material to a room temperature.Type: ApplicationFiled: May 27, 2011Publication date: September 22, 2011Applicant: Korea Institute of Geoscience and Mineral Resources (KIGAM)Inventors: Kang-Sup CHUNG, Yong-Jae SUH, Dae-Sup KIL, Hwan LEE
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Publication number: 20110049415Abstract: Provided are a method for preparing zinc oxide (ZnO) nanoparticles and a method for preparing ZnO nanofluid using the same. The method for preparing ZnO nanoparticles includes: a) heating deionized water; b) dissolving zinc (Zn) salt in the deionized water to prepare a precursor solution; c) adding solid alkali salt to the precursor solution to prepare a dispersion of ZnO nanoparticles; and d) separating the ZnO nanoparticles by solid-liquid separation and washing them with deionized water. Highly pure, crystalline ZnO nanoparticles with spherical shape and very narrow particle size distribution of 10 to 50 nm can be prepared quickly and at large scale and low cost using inexpensive materials via a stable low-temperature process, without using a dispersant. The associated low-temperature, normal-pressure process produces few harmful materials and may be easily employed for production of ZnO nanoparticles.Type: ApplicationFiled: August 24, 2010Publication date: March 3, 2011Applicant: Korea Institute of Geoscience and Mineral Resources (KIGAM)Inventors: Hyo-sook Lee, Yong Jae Suh, Dae Sup Kil, Kuk Cho
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Patent number: 7550618Abstract: The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. According to the present invention, it is possible to obtain high purity iron(II) acetate using low grade magnetite and there are advantages of mass producible environmentally-friendly simple process and prevention of corrosion of facilities.Type: GrantFiled: December 20, 2007Date of Patent: June 23, 2009Assignee: Korea Institute of Geoscience & Mineral ResourcesInventors: Hee Dong Jang, Yong Jae Suh, Dae Sup Kil, Kee Kahb Koo, Jae Kyeong Kim, Han Sang Oh
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Publication number: 20090130485Abstract: There is provided a method for manufacturing oligomer/halloysite composite material including the steps of: adding halloysite powder to an oligomer solution to be mixed; heating the mixed material to expand air inside of halloysite nanotube; and filling the oligomer solution inside of the halloysite nanotube by cooling the mixed material to a room temperature.Type: ApplicationFiled: February 5, 2008Publication date: May 21, 2009Applicant: Korea Institute of Geoscience and Mineral Resources (KIGAM)Inventors: Kang-Sup CHUNG, Yong-Jae SUH, Dae-Sup KIL, Hwan LEE
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Publication number: 20090105493Abstract: The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. According to the present invention, it is possible to obtain high purity iron(II) acetate using low grade magnetite and there are advantages of mass producible environmentally-friendly simple process and prevention of corrosion of facilities.Type: ApplicationFiled: December 20, 2007Publication date: April 23, 2009Applicant: KOREA INSTITUTE OF GEOSCIENCE & MINERAL RESOURCESInventors: Hee Dong Jang, Yong Jae Suh, Dae Sup Kil, Kee Kahb Koo, Jae Kyeong Kim, Han Sang Oh
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Publication number: 20080119350Abstract: There is provided a method for preparing an ion exchange type lithium adsorbent using a filter including: synthesizing precursor powder as lithium manganese oxide having a spinel structure; filling the precursor powder in the filter; and acid-treating the filter filled with the precursor powder.Type: ApplicationFiled: November 20, 2007Publication date: May 22, 2008Applicant: Korea Institute of Geosciences and Mineral ResourcesInventors: Kang-Sup CHUNG, Jae-Chun LEE, Yong-Jae SUH, Dae-Sup KIL, Hwan LEE