Patents by Inventor Chung-Heon Jeong
Chung-Heon Jeong 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: 20240132357Abstract: An embodiment of the present specification provides a method for preparing a catalyst for preparing a carbon nanotube, comprising: (a) dissolving a main catalyst precursor, a support precursor, a cocatalyst precursor and a precipitation inhibitor in a solvent to prepare a precursor solution; and (b) pyrolyzing the precursor solution by spraying the precursor solution into a reactor, wherein a mole fraction of the precipitation inhibitor to the cocatalyst precursor is 0.1 to 1.5.Type: ApplicationFiled: October 19, 2023Publication date: April 25, 2024Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Myung Hoon JEONG, Hyun Tae KIM, Sang Hyo RYU, Chung Heon JEONG, Wan Sung LEE, Woo Ram JUNG, Chang Gu KANG
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Patent number: 11524277Abstract: Provided is a catalyst for manufacturing multi-wall carbon nanotubes, the catalyst including metal components according to <Equation> Ma:Mb=x:y, and having a hollow structure with a thickness of 0.5-10 ?m. In the above equation, Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0?x?7.5, and 2.5?y?8.0.Type: GrantFiled: March 2, 2018Date of Patent: December 13, 2022Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Sang Hyo Ryu, Hyun Kyung Sung, Chung Heon Jeong, Dong Hwan Kim
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Patent number: 11441006Abstract: An embodiment of the present invention provides a rubber composition for tires and a method for producing same, wherein the rubber composition for tires includes: carbon nanotubes including structural defects on at least a portion of the surface and having a thermal decomposition temperature equal to or less than 600° C.; and a rubber matrix.Type: GrantFiled: August 16, 2018Date of Patent: September 13, 2022Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Nam Sun Choi, Dong Hoon Oh, Sang Hyo Ryu, Chung Heon Jeong
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Patent number: 11117803Abstract: A method for manufacturing multi-wall carbon nanotubes, includes the steps of: (a) dissolving a metal precursor in a solvent to prepare a precursor solution; (b) perform thermal decomposition while spraying the precursor solution into a reactor, thereby forming a catalyst powder; and (c) introducing the catalyst powder into a fluidized-bed reactor heated to 600-900° C. and spraying a carbon-based gas and a carrier gas to synthesize multi-wall carbon nanotubes from the catalyst powder, wherein steps (a) to (c) are performed in a continuous type and wherein the catalyst powder contains metal components according to equation 1 below. <Equation 1> Ma:Mb=x:y, wherein Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0?x?7.5, and 2.5?y?8.0.Type: GrantFiled: March 2, 2018Date of Patent: September 14, 2021Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Sang Hyo Ryu, Hyun Kyung Sung, Chung Heon Jeong, Dong Hwan Kim
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Publication number: 20200231443Abstract: An embodiment of the present invention provides a method for manufacturing multi-wall carbon nanotubes, the method comprising the steps of: (a) dissolving a metal precursor in a solvent to prepare a precursor solution; (b) perform thermal decomposition while spraying the precursor solution into a reactor, thereby forming a catalyst powder; and (c) introducing the catalyst powder into a fluidized-bed reactor heated to 600-900° C. and spraying a carbon-based gas and a carrier gas to synthesize multi-wall carbon nanotubes from the catalyst powder, wherein steps (a) to (c) are performed in a continuous type and wherein the catalyst powder contains metal components according to equation 1 below. <Equation 1> Ma:Mb=x:y, wherein Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0?x?7.5, and 2.5?y?8.0.Type: ApplicationFiled: March 2, 2018Publication date: July 23, 2020Inventors: Sang Hyo RYU, Hyun Kyung SUNG, Chung Heon JEONG, Dong Hwan KIM
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Publication number: 20200216633Abstract: An embodiment of the present invention provides a rubber composition for tires and a method for producing same, wherein the rubber composition for tires includes: carbon nanotubes including structural defects on at least a portion of the surface and having a thermal decomposition temperature equal to or less than 600° C.; and a rubber matrix.Type: ApplicationFiled: August 16, 2018Publication date: July 9, 2020Inventors: Nam Sun CHOI, Dong Hoon OH, Sang Hyo RYU, Chung Heon JEONG
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Publication number: 20200078772Abstract: Provided is a catalyst for manufacturing multi-wall carbon nanotubes, the catalyst including metal components according to <Equation> Ma:Mb=x:y, and having a hollow structure with a thickness of 0.5-10 ?m. In the above equation, Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0?x?7.5, and 2.5?y?8.0.Type: ApplicationFiled: March 2, 2018Publication date: March 12, 2020Inventors: Sang Hyo RYU, Hyun Kyung SUNG, Chung Heon JEONG, Dong Hwan KIM
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Patent number: 10290388Abstract: According to one aspect of the present invention, carbon nanotubes whose diameter, length, crystallinity, purity and the like are adjusted to predetermined ranges are added to a thermoplastic resin, and thus the thermoplastic resin can be provided with improved electrical conductivity.Type: GrantFiled: February 17, 2017Date of Patent: May 14, 2019Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Dong Hoon Oh, Hyun Kyung Sung, Sang Hyo Ryu, Chung Heon Jeong, Ki Hong Kim, Dong Hwan Kim
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Publication number: 20170243669Abstract: According to one aspect of the present invention, carbon nanotubes whose diameter, length, crystallinity, purity and the like are adjusted to predetermined ranges are added to a thermoplastic resin, and thus the thermoplastic resin can be provided with improved electrical conductivity.Type: ApplicationFiled: February 17, 2017Publication date: August 24, 2017Inventors: Dong Hoon OH, Hyun Kyung SUNG, Sang Hyo RYU, Chung Heon JEONG, Ki Hong KIM, Dong Hwan KIM
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Patent number: 9321651Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.Type: GrantFiled: August 21, 2015Date of Patent: April 26, 2016Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Sang Kyu Choi, Sang Hyo Ryu, Ho Soo Hwang, Chung Heon Jeong, Dong Hoon Oh, Yeon Ja Lee, Youngchan Jang
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Publication number: 20150353360Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.Type: ApplicationFiled: August 21, 2015Publication date: December 10, 2015Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Sang Kyu CHOI, Sang Hyo RYU, Ho Soo HWANG, Chung Heon JEONG, Dong Hoon OH, Yeon Ja LEE, Youngchan JANG
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Patent number: 9186656Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.Type: GrantFiled: November 5, 2012Date of Patent: November 17, 2015Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Sang Kyu Choi, Sang Hyo Ryu, Ho Soo Hwang, Chung Heon Jeong, Dong Hoon Oh, Yeon Ja Lee, Youngchan Jang
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Publication number: 20140087184Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.Type: ApplicationFiled: November 5, 2012Publication date: March 27, 2014Inventors: Sang Kyu CHOI, Sang Hyo RYU, Ho Soo HWANG, Chung Heon JEONG, Dong Hoon OH, Yeon Ja LEE, Youngchan JANG
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Patent number: 8333928Abstract: Provided is an apparatus for producing carbon nanotubes. The apparatus includes a reaction chamber and a rotating member. The reaction chamber provides a reaction space in which metal catalysts and a source gas react with one another to produce carbon nanotubes. The rotating member increases fluidizing of the metal catalysts in the reaction space to increase productivity and raise the gas conversion rate, thereby reducing the price of carbon nanotubes and preventing adhering of metal catalysts to the sidewall of the reaction chamber.Type: GrantFiled: November 4, 2008Date of Patent: December 18, 2012Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Suk-Won Jang, Chung-Heon Jeong, Jong-Kwan Jeon, Ho-Soo Hwang
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Patent number: 8263014Abstract: In an apparatus and method of generating a carbon nanotube (CNT), a process chamber is heated to a target temperature and a catalyst powder is supplied into the heated process chamber. The catalyst powder moves in a first direction in the process chamber. A source gas is supplied into the process chamber in a second direction opposite to the first direction, so that the source gas delays the movement of the catalyst powder in the first direction and is reacted with the catalyst powder in the process chamber to thereby produce the CNT in the process chamber. Accordingly, the flow of the source gas against the flow of the catalyst powder reduces the drop velocity of the catalyst powder. Therefore, the source gas and the catalyst powder may be reacted with each other for a sufficiently long time.Type: GrantFiled: November 30, 2010Date of Patent: September 11, 2012Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Suk-Won Jang, Byung-Yun Kong, Chung-Heon Jeong
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Patent number: 8052940Abstract: Provided are an apparatus for synthesizing carbon nanotubes, the apparatus including a reaction tube that provides a space for carbon nanotubes and is formed vertically long, a heating unit that is formed at the outer side of the reaction tube, and heats the reaction tube, a gas-supply unit that sprays reaction gas for synthesizing the carbon nanotubes by reacting with catalysts positioned inside the reaction tube, an exhaustion unit that is connected to the upper portion of the reaction tube, and discharges non-reacted reaction gas for synthesizing the carbon nanotubes, and a blocking unit that is formed inside the reaction tube, discharges only the non-reacted reaction gas for synthesizing the carbon nanotubes to the exhaustion unit, and blocks the discharge of the carbon nanotubes and catalysts, in which the cross-section of the blocking unit is divided in a plurality of polygon structures, and downward-slanted blocking wings are formed at each divided cell.Type: GrantFiled: September 29, 2009Date of Patent: November 8, 2011Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Chung-Heon Jeong, Jong-Kwan Jeon, Suk-Won Jang
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Patent number: 7972571Abstract: Provided is an apparatus for synthesizing carbon nanotubes (CNTs). The apparatus includes: a vertical reaction chamber; a mixer which is disposed within the vertical reaction chamber and mixes a catalyst supplied from above; and a plurality of dispersion plates which vertically partition a space inside the vertical reaction chamber into a plurality of sections and uniformly disperse a source gas, which is supplied from above, into the sections.Type: GrantFiled: November 28, 2008Date of Patent: July 5, 2011Assignee: Semes Co., LtdInventors: Suk-Won Jang, Jong-Kwan Jeon, Chung-Heon Jeong
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Publication number: 20110097247Abstract: In an apparatus and method of generating a carbon nanotube (CNT), a process chamber is heated to a target temperature and a catalyst powder is supplied into the heated process chamber. The catalyst powder moves in a first direction in the process chamber. A source gas is supplied into the process chamber in a second direction opposite to the first direction, so that the source gas delays the movement of the catalyst powder in the first direction and is reacted with the catalyst powder in the process chamber to thereby produce the CNT in the process chamber. Accordingly, the flow of the source gas against the flow of the catalyst powder reduces the drop velocity of the catalyst powder. Therefore, the source gas and the catalyst powder may be reacted with each other for a sufficiently long time.Type: ApplicationFiled: November 30, 2010Publication date: April 28, 2011Applicant: Semes Co., Ltd.Inventors: SUK-WON JANG, Byung-Yun Kong, Chung-Heon Jeong
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Publication number: 20100129275Abstract: Provided is an apparatus for synthesizing carbon nanotubes (CNTs). The apparatus includes: a vertical reaction chamber; a mixer which is disposed within the vertical reaction chamber and mixes a catalyst supplied from above; and a plurality of dispersion plates which vertically partition a space inside the vertical reaction chamber into a plurality of sections and uniformly disperse a source gas, which is supplied from above, into the sections.Type: ApplicationFiled: November 28, 2008Publication date: May 27, 2010Applicant: SEMES CO., LTD.Inventors: Suk-Won JANG, Jong-Kwan JEON, Chung-Heon JEONG
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Publication number: 20100129274Abstract: Provided are an apparatus for synthesizing carbon nanotubes, the apparatus including a reaction tube that provides a space for carbon nanotubes and is formed vertically long, a heating unit that is formed at the outer side of the reaction tube, and heats the reaction tube, a gas-supply unit that sprays reaction gas for synthesizing the carbon nanotubes by reacting with catalysts positioned inside the reaction tube, an exhaustion unit that is connected to the upper portion of the reaction tube, and discharges non-reacted reaction gas for synthesizing the carbon nanotubes, and a blocking unit that is formed inside the reaction tube, discharges only the non-reacted reaction gas for synthesizing the carbon nanotubes to the exhaustion unit, and blocks the discharge of the carbon nanotubes and catalysts, in which the cross-section of the blocking unit is divided in a plurality of polygon structures, and downward-slanted blocking wings are formed at each divided cell.Type: ApplicationFiled: September 29, 2009Publication date: May 27, 2010Inventors: Chung-Heon Jeong, Jong-Kwan Jeon, Suk-Won Jang