Patents by Inventor Hoi In Jeong
Hoi In 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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Patent number: 11541327Abstract: A method of separating an organic solvent which may easily separate and recover an organic solvent from a mixed solution containing the organic solvent, and an organic solvent separation system capable of performing the same are disclosed herein. In some embodiments, the method includes introducing a first mixed solution into a first distillation column to recover an organic solvent and discharge a first fraction containing an unrecovered organic solvent and a high boiling point compound A to a bottom of the column, introducing a second mixed solution into a second distillation column to recover organic solvent and discharge a second fraction containing an unrecovered organic solvent and a high boiling point compound B, and introducing the first fraction and the second fraction into a third distillation column to recover an organic solvent-rich fraction and a high boiling point compound-rich fraction.Type: GrantFiled: October 29, 2019Date of Patent: January 3, 2023Inventors: Jun Seok Ko, Hoi In Jeong, Jeong Seok Lee, Dong Min Kim, Su Ji Yoon
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Patent number: 11370858Abstract: A method of preparing a conjugated diene-based polymer is provided. The method includes: adding a conjugated diene-based monomer, a catalyst, and a solvent to parallel polymerization reactors, performing a polymerization reaction to prepare a first polymer solution including a first conjugated diene-based polymer; and adding the first polymer solution to a polymerization reactor connected in series to the parallel polymerization reactors, performing the polymerization reaction to prepare a second polymer solution including a second conjugated diene-based polymer. After the polymerization reaction in the series polymerization reactor, gas produced by polymerization heat is condensed in the series polymerization reactor and refluxed to the parallel polymerization reactors, and a reaction temperature of the series polymerization reactor is maintained to be lower than a reaction temperature of the parallel polymerization reactors by 10° C. or more.Type: GrantFiled: January 10, 2019Date of Patent: June 28, 2022Inventors: Jun Seok Ko, Hoi In Jeong, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
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Patent number: 11299565Abstract: A method of preparing a conjugated diene-based polymer is provided including: a step of polymerizing a first conjugated diene-based monomer in solution in a first polymerization reactor to prepare a first polymer solution including a first conjugated diene-based polymer; a step of polymerizing a second conjugated diene-based monomer in solution in a second polymerization reactor to prepare a second polymer solution including a second conjugated diene-based polymer; a step of supplying a first fluid separated from the first polymer solution to a first purification unit and purifying the first fluid; and a step of supplying a second fluid separated from the second polymer solution to a second purification unit and purifying the second fluid. An apparatus for preparing a conjugated diene-based polymer is also provided.Type: GrantFiled: January 11, 2019Date of Patent: April 12, 2022Inventors: Hoi In Jeong, Jun Seok Ko, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
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Publication number: 20210016200Abstract: A method of separating an organic solvent which may easily separate and recover an organic solvent from a mixed solution containing the organic solvent, and an organic solvent separation system capable of performing the same are disclosed herein. In some embodiments, the method includes introducing a first mixed solution into a first distillation column to recover an organic solvent and discharge a first fraction containing an unrecovered organic solvent and a high boiling point compound A to a bottom of the column, introducing a second mixed solution into a second distillation column to recover organic solvent and discharge a second fraction containing an unrecovered organic solvent and a high boiling point compound B, and introducing the first fraction and the second fraction into a third distillation column to recover an organic solvent-rich fraction and a high boiling point compound-rich fraction.Type: ApplicationFiled: October 29, 2019Publication date: January 21, 2021Applicant: LG Chem, Ltd.Inventors: Jun Seok Ko, Hoi In Jeong, Jeong Seok Lee, Dong Min Kim, Su Ji Yoon
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Publication number: 20200207888Abstract: A method of preparing a conjugated diene-based polymer is provided. The method includes: adding a conjugated diene-based monomer, a catalyst, and a solvent to parallel polymerization reactors, performing a polymerization reaction to prepare a first polymer solution including a first conjugated diene-based polymer; and adding the first polymer solution to a polymerization reactor connected in series to the parallel polymerization reactors, performing the polymerization reaction to prepare a second polymer solution including a second conjugated diene-based polymer. After the polymerization reaction in the series polymerization reactor, gas produced by polymerization heat is condensed in the series polymerization reactor and refluxed to the parallel polymerization reactors, and a reaction temperature of the series polymerization reactor is maintained to be lower than a reaction temperature of the parallel polymerization reactors by 10° C. or more.Type: ApplicationFiled: January 10, 2019Publication date: July 2, 2020Applicant: LG Chem, Ltd.Inventors: Jun Seok Ko, Hoi In Jeong, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
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Publication number: 20190389984Abstract: A method of preparing a conjugated diene-based polymer is provided including: a step of polymerizing a first conjugated diene-based monomer in solution in a first polymerization reactor to prepare a first polymer solution including a first conjugated diene-based polymer; a step of polymerizing a second conjugated diene-based monomer in solution in a second polymerization reactor to prepare a second polymer solution including a second conjugated diene-based polymer; a step of supplying a first fluid separated from the first polymer solution to a first purification unit and purifying the first fluid; and a step of supplying a second fluid separated from the second polymer solution to a second purification unit and purifying the second fluid. An apparatus for preparing a conjugated diene-based polymer is also provided.Type: ApplicationFiled: January 11, 2019Publication date: December 26, 2019Applicant: LG Chem, Ltd.Inventors: Hoi In Jeong, Jun Seok Ko, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
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Patent number: 10371442Abstract: The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may improve the economics and increase separation efficiency by easily refluxing ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and may also improve process efficiency by reducing the amount of heat used by a reboiler.Type: GrantFiled: April 28, 2016Date of Patent: August 6, 2019Assignee: LG CHEM, LTD.Inventors: Hoi In Jeong, Mi Kyung Kim, Jong Ku Lee, Jeong Seok Lee
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Patent number: 10315972Abstract: The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may easily reflux ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and thus may improve the economics while increasing separation efficiency.Type: GrantFiled: April 28, 2016Date of Patent: June 11, 2019Assignee: LG CHEM, LTD.Inventors: Hoi In Jeong, Jong Ku Lee, Jeong Seok Lee, Mi Kyung Kim
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Patent number: 10259897Abstract: Provided is a method of preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon during the preparation of polybutadiene and increasing a conversion rate.Type: GrantFiled: October 18, 2016Date of Patent: April 16, 2019Assignee: LG Chem, Ltd.Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
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Patent number: 10246534Abstract: Provided is an apparatus for preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon during the preparation of polybutadiene and increasing a conversion rate.Type: GrantFiled: October 18, 2016Date of Patent: April 2, 2019Assignee: LG Chem, Ltd.Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
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Publication number: 20180051108Abstract: Provided is a method of preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon occurred during the preparation of polybutadiene and increasing a conversion rate.Type: ApplicationFiled: October 18, 2016Publication date: February 22, 2018Applicant: LG Chem, Ltd.Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
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Publication number: 20180044266Abstract: The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may easily reflux ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and thus may improve the economics while increasing separation efficiency.Type: ApplicationFiled: April 28, 2016Publication date: February 15, 2018Inventors: Hoi In JEONG, Jong Ku LEE, Jeong Seok LEE, Mi Kyung KIM
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Publication number: 20180037683Abstract: Provided is an apparatus for preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon occurred during the preparation of polybutadiene and increasing a conversion rate. The apparatus for preparing polybutadiene includes two first polymerization reactors arranged in parallel to reduce the plugging phenomenon in which butadiene (reaction raw material), a polymerization catalyst, and a solvent are respectively supplied and polymerized, at least one second polymerization reactor arranged in series with the first polymerization reactors in which a first polymerization solution containing a butadiene polymer discharged from the first polymerization reactors is supplied and a butadiene polymerization reaction is performed, and one or more condensers which condense gases discharged from the first polymerization reactors and the second polymerization reactor and supply a condensate to the first polymerization reactors and/or the second polymerization reactor.Type: ApplicationFiled: October 18, 2016Publication date: February 8, 2018Applicant: LG Chem, Ltd.Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
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Publication number: 20170198967Abstract: The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may improve the economics and increase separation efficiency by easily refluxing ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and may also improve process efficiency by reducing the amount of heat used by a reboiler.Type: ApplicationFiled: April 28, 2016Publication date: July 13, 2017Inventors: Hoi In JEONG, Mi Kyung KIM, Jong Ku LEE, Jeong Seok LEE
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Patent number: 9504972Abstract: Disclosed are an apparatus for preparing a polymer latex resin powder in which an efficiency of mixing of steam, a latex, and a coagulant is increased by introducing a non-continuous screw into a reactor that performs coagulation and aging and thus a moisture content of a slurry is decreased and, accordingly, drying efficiency may be enhanced, and a polymer latex resin powder with excellent color and powder characteristics may be prepared using a decreased amount of coagulant and a method of preparing a polymer latex resin powder by using the same.Type: GrantFiled: December 24, 2013Date of Patent: November 29, 2016Assignee: LG Chem, Ltd.Inventors: Chang Sull Kim, Min Cheol Ju, Hyung Sub Lee, Hoi In Jeong
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Publication number: 20150322255Abstract: Disclosed are an apparatus for preparing a polymer latex resin powder in which an efficiency of mixing of steam, a latex, and a coagulant is increased by introducing a non-continuous screw into a reactor that performs coagulation and aging and thus a moisture content of a slurry is decreased and, accordingly, drying efficiency may be enhanced, and a polymer latex resin powder with excellent color and powder characteristics may be prepared using a decreased amount of coagulant and a method of preparing a polymer latex resin powder by using the same.Type: ApplicationFiled: December 24, 2013Publication date: November 12, 2015Inventors: Chang Sull Kim, Min Cheol Ju, Hyung Sub Lee, Hoi In Jeong
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Publication number: 20070143953Abstract: A vacuum cleaner includes both a main dust separation unit and a secondary dust separation unit. One of the dust separation units is provided on a main body of the vacuum cleaner, and the other dust separation unit is provided on a removable dust collection unit that is mountable on the main body.Type: ApplicationFiled: November 30, 2006Publication date: June 28, 2007Inventors: Man Hwang, Hae Yang, Hoi Jeong, Myung Yoo, Jae Kim, Moo Ko, Kie Hyun, Jong Choo
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Publication number: 20060137306Abstract: A dust collection unit for a vacuum cleaner includes a first filtering chamber filtering relatively large foreign objects, a second filtering chamber filtering relatively small foreign objects when air exhausted from the first filtering chamber is introduced into the second filtering chamber, an exhaust member disposed above the filtering chambers to guide airflow, a storing chamber disposed under the filtering chambers to store the foreign objects filtered in the filtering chambers, a sealing member sealing bottoms of the filtering chambers, and a rectifying unit formed on an exhaust side of the second filtering chamber to rectify airflow, thereby reducing noise generated by the airflow.Type: ApplicationFiled: September 23, 2005Publication date: June 29, 2006Applicant: LG ELECTRONICS, INC.Inventors: Hoi Jeong, Geun Hwang, Young Kim
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Publication number: 20060137307Abstract: A dust collecting unit of a vacuum cleaner is provided. The dust collecting unit includes: a plurality of storing chambers and a plurality of filtering chambers provided in the inside of a multi-cyclone dust collecting unit. To improve reliability of the product, the storing chambers and the filtering chambers are integrally formed as one body.Type: ApplicationFiled: September 23, 2005Publication date: June 29, 2006Applicant: LG ELECTRONICS, INC.Inventors: Hoi Jeong, Man Hwang, Young Kim, Jung Hwang, Min Park
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Publication number: 20060137303Abstract: A dust collection unit for a vacuum cleaner includes a first cylindrical filtering chamber for filtering foreign objects contained in air using a cyclone airflow, a plurality of second filtering chamber formed along an outer circumference of the first cylindrical filtering chamber to receive the air passed through the first cylindrical filtering chamber, a first storing chamber formed under the first filtering chamber to store the foreign objects filtered in the first filtering chamber, a second storing chamber for storing the foreign objects filtered in the second filtering chambers, and a connection plate interconnecting opposite ends of the second storing chamber to define the first filtering chamber, the connection plate having a lower end located to be higher than a lower end of the second storing chamber.Type: ApplicationFiled: September 23, 2005Publication date: June 29, 2006Applicant: LG ELECTRONICS, INC.Inventors: Hoi Jeong, Man Hwang, Young Kim, Jung Hwang, Min Park