Patents by Inventor Jun Seok Ko
Jun Seok Ko 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: 11970558Abstract: A method of recovering a solvent including: supplying polymerization reactants including one or more monomers and a solvent to a reactor to obtain a polymer solution; supplying a stream including the polymer solution to a separator to separate an upper discharge stream including the solvent, wherein the solvent is in a gaseous phase, and a lower discharge stream including the polymer solution; heating a divergence stream including a part of the lower discharge stream from the separator by a heating device and refluxing the divergence stream to the separator; supplying a residue stream including a remainder of the lower discharge stream from the separator to a steam stripping process unit; and adjusting a vapor mass fraction of the divergence stream which is refluxed to the separator with a pressure adjustment valve after being heated by the heating device.Type: GrantFiled: January 15, 2021Date of Patent: April 30, 2024Assignee: LG CHEM, LTD.Inventors: Suk Yung Oh, Jun Seok Ko, Kwan Sik Kim, Joon Ho Shin, Byeong Gil Lyu, Se Kyung Lee
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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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Publication number: 20220348536Abstract: Disclosed is a recovery method of a nitrile-based monomer including: supplying a feed stream including a nitrile-based monomer, a nitrogen compound, and water to a first distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; condensing the upper discharge stream of the first distillation tower and supplying the condensed stream to a decanter to separate the stream into a water layer and an organic layer; supplying an organic layer stream discharged from the decanter to a second distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; and splitting a part of the upper discharge stream from the second distillation tower and refluxing the split stream to the second distillation tower.Type: ApplicationFiled: July 9, 2021Publication date: November 3, 2022Applicant: LG CHEM, LTD.Inventors: Sang Cheol SHIN, Jun Seok KO, Yong Heon CHO, Joon Ho SHIN
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Publication number: 20220306790Abstract: A method of recovering a solvent including: supplying polymerization reactants including one or more monomers and a solvent to a reactor to obtain a polymer solution; supplying a stream including the polymer solution to a separator to separate an upper discharge stream including the solvent, wherein the solvent is in a gaseous phase, and a lower discharge stream including the polymer solution; heating a divergence stream including a part of the lower discharge stream from the separator by a heating device and refluxing the divergence stream to the separator; supplying a residue stream including a remainder of the lower discharge stream from the separator to a steam stripping process unit; and adjusting a vapor mass fraction of the divergence stream which is refluxed to the separator with a pressure adjustment valve after being heated by the heating device.Type: ApplicationFiled: January 15, 2021Publication date: September 29, 2022Inventors: Suk Yung Oh, Jun Seok Ko, Kwan Sik Kim, Joon Ho Shin, Byeong Gil Lyu, Se Kyung Lee
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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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Publication number: 20220195075Abstract: A continuous preparation system of a conjugated diene-based polymer having improved rolling resistance properties is provided. By utilizing the continuous preparation system, a polymerization conversion ratio at an initial stage of polymerization is easy to control, long time operation is possible and productivity is excellent.Type: ApplicationFiled: December 24, 2020Publication date: June 23, 2022Applicant: LG Chem, Ltd.Inventors: Tae Chul Lee, Su Hwa Kim, No Ma Kim, Jun Seok Ko
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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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Patent number: 10920004Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.Type: GrantFiled: December 7, 2017Date of Patent: February 16, 2021Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung 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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Patent number: 10882939Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.Type: GrantFiled: December 7, 2017Date of Patent: January 5, 2021Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung Lee
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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: 10428007Abstract: The present invention relates to a method for producing unsaturated aldehydes and unsaturated carboxylic acids. According to the present invention, a method for producing unsaturated aldehydes and unsaturated carboxylic acids which can impart activity and control temperature independently in fixed catalyst layer zones in a shell-and-tube reactor, thereby exhibiting improved yield and operation stability, is provided.Type: GrantFiled: October 17, 2017Date of Patent: October 1, 2019Assignee: LG CHEM, LTD.Inventors: Byung Yul Choi, Hyun Jong Shin, Junghoon Chang, Young Hyun Choe, Jun Seok Ko, Sang Hun Jeon
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Publication number: 20190256635Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.Type: ApplicationFiled: December 7, 2017Publication date: August 22, 2019Applicant: LG Chem, Ltd.Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chul Lee, He Seung Lee
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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: 20190092713Abstract: The present invention relates to a method for producing unsaturated aldehydes and unsaturated carboxylic acids. According to the present invention, a method for producing unsaturated aldehydes and unsaturated carboxylic acids which can impart activity and control temperature independently in fixed catalyst layer zones in a shell-and-tube reactor, thereby exhibiting improved yield and operation stability, is provided.Type: ApplicationFiled: October 17, 2017Publication date: March 28, 2019Applicant: LG CHEM, LTD.Inventors: Byung Yul CHOI, Hyun Jong SHIN, Junghoon CHANG, Young Hyun CHOE, Jun Seok KO, Sang Hun JEON
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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: 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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Patent number: 9650460Abstract: The present invention relates to a long-chain branched elastic terpolymer capable of satisfying excellent processability and elasticity (flexibility) at the same time, which is obtained in the presence of a Group IV transition metal catalyst, and a preparation method thereof. The elastic terpolymer is a copolymer of ethylene, an alpha-olefin having 3 to 20 carbon atoms, and a diene, wherein i) its weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) x which is the ethylene content (% by weight) and y which is the density value (g/cm3) of the copolymer measured when the ethylene content is X satisfy a relationship of 0.0000175214x(x?75.65420571)+0.875?y?0.0000175214x(x?75.65420571)+0.881.Type: GrantFiled: June 30, 2014Date of Patent: May 16, 2017Assignee: LG Chem, Ltd.Inventors: Sung Ho Park, Sung Cheol Yoon, Sun Keun Kim, Jun Seok Ko, Sang Eun Park, Soo Young Choi