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).

  • Patent number: 10920004
    Abstract: 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: Grant
    Filed: December 7, 2017
    Date of Patent: February 16, 2021
    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 Chui Lee, He Seung Lee
  • Publication number: 20210016200
    Abstract: 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: Application
    Filed: October 29, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jun Seok Ko, Hoi In Jeong, Jeong Seok Lee, Dong Min Kim, Su Ji Yoon
  • Patent number: 10882939
    Abstract: 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: Grant
    Filed: December 7, 2017
    Date of Patent: January 5, 2021
    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 Chui Lee, He Seung Lee
  • Publication number: 20200207888
    Abstract: 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: Application
    Filed: January 10, 2019
    Publication date: July 2, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun Seok Ko, Hoi In Jeong, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
  • Publication number: 20190389984
    Abstract: 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: Application
    Filed: January 11, 2019
    Publication date: December 26, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Hoi In Jeong, Jun Seok Ko, Woo Sung Hwang, Dong Min Kim, Jeong Seok Lee
  • Patent number: 10428007
    Abstract: 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: Grant
    Filed: October 17, 2017
    Date of Patent: October 1, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Byung Yul Choi, Hyun Jong Shin, Junghoon Chang, Young Hyun Choe, Jun Seok Ko, Sang Hun Jeon
  • Publication number: 20190256635
    Abstract: 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: Application
    Filed: December 7, 2017
    Publication date: August 22, 2019
    Applicant: 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
  • Patent number: 10259897
    Abstract: 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: Grant
    Filed: October 18, 2016
    Date of Patent: April 16, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
  • Patent number: 10246534
    Abstract: 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: Grant
    Filed: October 18, 2016
    Date of Patent: April 2, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
  • Publication number: 20190092713
    Abstract: 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: Application
    Filed: October 17, 2017
    Publication date: March 28, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Byung Yul CHOI, Hyun Jong SHIN, Junghoon CHANG, Young Hyun CHOE, Jun Seok KO, Sang Hun JEON
  • Publication number: 20180051108
    Abstract: 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: Application
    Filed: October 18, 2016
    Publication date: February 22, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
  • Publication number: 20180037683
    Abstract: 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: Application
    Filed: October 18, 2016
    Publication date: February 8, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Woo Sung Hwang, Jun Seok Ko, Hoi In Jeong, Jong Ku Lee
  • Patent number: 9650460
    Abstract: 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: Grant
    Filed: June 30, 2014
    Date of Patent: May 16, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Sung Ho Park, Sung Cheol Yoon, Sun Keun Kim, Jun Seok Ko, Sang Eun Park, Soo Young Choi
  • Patent number: 9637579
    Abstract: The present invention relates to an elastic terpolymer which can satisfy excellent processability and elasticity (flexibility) at the same time, and a preparation method thereof. The elastic terpolymer is a copolymer of 40 to 70 weight % of ethylene, 15 to 55 weight % of a C3-C20 alpha-olefin, and 0.5 to 20 weight % of a diene obtained in the presence of a group 4 transition metal catalyst, of which i) the weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) ? tan ?, the difference between the tan ? values at the angular frequencies of 0.2 rad/s and 100.0 rad/s, is 0.5 or less that is measured at 100° C. by using a rubber process analyzer.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: May 2, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Cheol Yoon, Sung-Ho Park, Jun-Seok Ko, Soo-Young Choi
  • Patent number: 9611349
    Abstract: The present invention relates to a method of preparing an ethylene/alpha-olefin/diene-based elastic copolymer having high viscosity and a high molecular weight, in which energy efficiency of the entire process is optimized. The method of preparing the elastic copolymer includes the steps of: copolymerizing an ethylene/alpha-olefin/diene-based elastic copolymer; and separating and removing the solvent and unreacted monomers from the polymer solution and recovering the elastic copolymer, by sequentially using a gas-liquid separator and a stripper in the purification of the solvent and unreacted monomers.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: April 4, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Seok Ko, Sung-Cheol Yoon, Sung-Ho Park, Soo-Young Choi
  • Patent number: 9493593
    Abstract: 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) its LCB Index which is a ratio of 1st harmonics of storage modulus to 5th harmonics of storage modulus measured at 125° C. using a rubber process analyzer according to a LAOS (Large Angles of Oscillation and high Strains) method has a positive value.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: November 15, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Sun Keun Kim, Sung Ho Park, Sung Cheol Yoon, Jun Seok Ko, Soo Young Choi
  • Publication number: 20160289359
    Abstract: 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: Application
    Filed: June 30, 2014
    Publication date: October 6, 2016
    Inventors: Sung Ho PARK, Sung Cheol YOON, Sun Keun KIM, Jun Seok KO, Sang Eun PARK, Soo Young CHOI
  • Patent number: 9458276
    Abstract: The present invention relates to an elastic terpolymer that can acquire good mechanical properties and elasticity (flexibility) at the same time, and a preparation method thereof. The elastic terpolymer, which is a copolymer of 40 to 70 wt % of ethylene, 15 to 55 wt % of a C3-C20 alpha-olefin, and 0.5 to 20 wt % of a diene as obtained in the presence of a group 4 transition metal catalyst, satisfies that: (i) the weight average molecular weight measured by GPC is 100,000 to 500,000; and (ii) the ethylene content x (wt %) and the crystallization enthalpy y (?HcJ/g) of the copolymer measured by DSC satisfy a defined relational expression.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: October 4, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Cheol Yoon, Jun-Seok Ko, Sung-Ho Park, Soo-Young Choi
  • Publication number: 20160280823
    Abstract: 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) its LCB Index which is a ratio of 1st harmonics of storage modulus to 5th harmonics of storage modulus measured at 125° C. using a rubber process analyzer according to a LAOS (Large Angles of Oscillation and high Strains) method has a positive value.
    Type: Application
    Filed: June 30, 2014
    Publication date: September 29, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Sun Keun KIM, Sung Ho PARK, Sung Cheol YOON, Jun Seok KO, Soo Young CHOI
  • Publication number: 20160272744
    Abstract: The present invention relates to an elastic terpolymer which can satisfy excellent processability and elasticity (flexibility) at the same time, and a preparation method thereof. The elastic terpolymer is a copolymer of 40 to 70 weight % of ethylene, 15 to 55 weight % of a C3-C20 alpha-olefin, and 0.5 to 20 weight % of a diene obtained in the presence of a group 4 transition metal catalyst, of which i) the weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) ? tan ?, the difference between the tan ? values at the angular frequencies of 0.2 rad/s and 100.0 rad/s, is 0.5 or less that is measured at 100° C. by using a rubber process analyzer.
    Type: Application
    Filed: October 14, 2013
    Publication date: September 22, 2016
    Inventors: Sung-Cheol YOON, Sung-Ho PARK, Jun-Seok KO, Soo-Young CHOI