Patents Assigned to SK Innovation Co., Ltd.
  • Patent number: 11911749
    Abstract: Provided are a chromium catalyst precursor, an ethylene oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same. More particularly, a chromium catalyst precursor which may oligomerize ethylene with high activity and high selectivity in spite of not using methylaluminoxane (MAO) or modified-methylaluminoxane (MMAO), an oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same are provided.
    Type: Grant
    Filed: August 18, 2022
    Date of Patent: February 27, 2024
    Assignee: SK Innovation Co., Ltd.
    Inventors: Il Gu Jung, Hyo Seung Park, Jun Soo Son, Myung Jin Kim, Jong Chan Kim
  • Patent number: 11905346
    Abstract: The present invention relates to a method for producing an ethylene-based copolymer, and more particularly, to a method for producing an ethylene-based copolymer capable of increasing process efficiency by preventing plugging and corrosion of a facility. The method for producing an ethylene-based copolymer includes a producing mode and a washing mode of which one is selectively performed. The producing mode includes: a) hyper-compressing primary compressed ethylene, and a mixture including a carboxylic acid-containing comonomer and a polar solvent to produce a compressed material; b) reacting the compressed material to produce a reaction product including an ethylene-based copolymer; and c) separating and recovering unreacted residues from the reaction product and introducing the unreacted residues into the mixture of step a). The washing mode includes: re-supplying the compressed material produced in step a) to step a) as a mixture, without performing step b).
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: February 20, 2024
    Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
    Inventors: Byoung Kyu Kwak, Sun Joo Kim, Hong Chan Kim, Kyung Jin Ma, Doh Yeon Park, Jae Eun Lee, Ho Seong Lee, Juan Carlos Estevez Videira, Manuel David Recasens Alvaro, In Su Lee, Wan Ju Jeong
  • Patent number: 11905474
    Abstract: Provided are an apparatus and a method for refining pyrolysis oil in which a dechlorination reaction is performed under a first hydrotreating catalyst. Hydrogen chloride as a by-product is removed, and then a denitrification reaction is performed under a second hydrotreating catalyst, thereby preventing production of an ammonium salt (NH4Cl), and providing refined oil. It is excellent in prevention of corrosion of a reactor, improvement of durability, occurrence of differential pressure, process efficiency, has very low contents of impurities such as chlorine, nitrogen, and metal and olefin, and has excellent quality.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: February 20, 2024
    Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
    Inventors: Hee Jung Jeon, Ok Youn Kim, Ka Young Kim, Young Moo Park, Ho Won Lee
  • Patent number: 11898173
    Abstract: Disclosed are a recombinant acid-resistant yeast having improved lactic-acid-producing ability and a method of preparing lactic acid using the same. When producing lactic acid using the recombinant acid-resistant yeast according to the present invention, not only lactic-acid fermentation can be performed with lactic-acid-producing ability similar to that of bacterial fermentation using a remarkably smaller amount of a neutralizing agent than in the case of conventional bacterial fermentation, but also the production of ethanol and glycerol which are byproducts can be reduced. Thus, fermentation costs can be greatly reduced and the cost of subsequent purification processes can be reduced.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: February 13, 2024
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jae Yeon Park, Tae Young Lee, Ki Sung Lee
  • Publication number: 20240027653
    Abstract: Provided is an optical multilayer structure including a shatterproof layer including a polyimide resin including a siloxane structure and an adhesion promoting layer. Since the adhesion promoting layer and the shatterproof layer of the optical multilayer structure according to one implementation are connected by a chemical bond (imide bond), interlayer adhesiveness is high and durability is excellent. In addition, the optical multilayer structure according to one implementation has excellent heat resistance, so that curling is reduced to minimize substrate bending, has high surface hardness, so that mechanical properties are excellent, and has a low haze and is transparent, so that optical properties are excellent.
    Type: Application
    Filed: July 11, 2023
    Publication date: January 25, 2024
    Applicant: SK Innovation Co., Ltd.
    Inventors: Chun Ho Kim, Cheol Min Yun
  • Patent number: 11858886
    Abstract: Disclosed is a process for converting methane into value-added compounds. In this process, a gas mixture containing hydrogen as well as high-concentration acetylene formed through methane pyrolysis (e.g. non-oxidative coupling of methane) is selectively hydrogenated in the presence of a bimetallic supported catalyst. This process obtains ethylene from acetylene in the gas mixture while unreacted methane and hydrogen are recovered as byproducts and/or additionally recycled.
    Type: Grant
    Filed: October 26, 2022
    Date of Patent: January 2, 2024
    Assignee: SK Innovation Co., Ltd.
    Inventors: Dong Min Yun, Ju Hwan Im, Hee Soo Kim, Do Kyoung Kim, Dae Hyun Choo
  • Publication number: 20230416621
    Abstract: Proposed is a process of producing a high-quality lube base oil using a refined oil fraction obtained from waste lubricant as a feedstock. The process includes purifying waste lubricant to obtain a refined oil fraction, pretreating the refined oil fraction, and blending the pretreated refined oil fraction with unconverted oil (UCO), before or after vacuum distillation and catalytic dewaxing of the unconverted oil, or between the vacuum distillation and the catalytic dewaxing of the unconverted oil.
    Type: Application
    Filed: August 25, 2023
    Publication date: December 28, 2023
    Applicants: SK INNOVATION CO., LTD., SK ENMOVE CO., LTD.
    Inventors: Young Wook JEON, Jin Hee OK, Kyung Seok NOH, Do Woan KIM
  • Patent number: 11851565
    Abstract: Provided is a method of preparing a composition for forming a polyimide film which may significantly improve dispersibility of a pigment. Specifically, the method includes preparing a polyamic acid resin in the presence of a pigment dispersion including a blue-based inorganic pigment and a dispersing agent. In addition, an average particle size of the inorganic pigment in the pigment dispersion may be 10 to 100 nm.
    Type: Grant
    Filed: August 29, 2022
    Date of Patent: December 26, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Cheol Min Yun, Hye Jin Park
  • Patent number: 11851412
    Abstract: The present invention relates to a diamine compound, a method of preparing the same, and a composition containing the same. The diamine compound of the present invention may be very usefully used as a monomer used to produce a polyimide film having excellent heat resistance and improved transparency and coefficient of thermal expansion.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: December 26, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Min Seon Jung, Hyo Shin Kwak, Joo Hyun Lee
  • Patent number: 11846755
    Abstract: Provided is a hard coating film. The hard coating film includes a base layer and a hard coating layer disposed on the base layer and having a pencil hardness of 4H or higher. A surface elongation at break of the hard coating film falls within a predetermined range, as measured by a certain method. The hard coating film shows excellent durability under high-temperature/high-humidity conditions, has no microcracks formed after repeated folding, and shows excellent pencil hardness.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: December 19, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Byoung Sun Ko, Jin Su Park, Tae Sug Jang, Keon Hyeok Ko, Ho Chul Yoon
  • Patent number: 11845842
    Abstract: The present invention relates to a new window cover film protecting a flexible display panel. Specifically, provided is a window cover film protecting a surface of a display device, the window cover film including a protective film formed on a base layer or a hard coating layer of a hard coating film having the base layer and the hard coating layer, and having no problem that the window cover film cannot be used as a display window cover film because a part of the protective film is not peeled off due to static electricity generated in the protective film, the base layer, or the hard coating layer when the protective film is peeled off, and the protective film remains on the base layer or a hard coating layer or the hard coating layer is partially or entirely peeled off.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: December 19, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Jong Nam Ahn, Hye Jin Kim
  • Patent number: 11845969
    Abstract: The present invention relates to a process of converting carbon dioxide using a combination of a carbon dioxide mineralization and the metabolism of sulfur-oxidizing microorganisms. According to the process, a carbonate produced in the carbon dioxide mineralization reaction can be converted to a useful substance without supplying an external additional energy source (light, electrical energy, etc.) and mineral resources (metal ions). In addition, the process can be continuously performed by recycling metal ions necessary for the carbon dioxide mineralization reaction.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: December 19, 2023
    Assignee: SK Innovation Co., Ltd.
    Inventors: Woo Chan Park, Kwang Kuk Cho, Taewan Kim, Yeon Hwa La, Jayoung Ryu, Sang Min Lee
  • Patent number: 11843125
    Abstract: The present invention relates to: a porous composite separator for a secondary battery including a porous substrate, and a coating layer formed on the porous substrate, wherein the coating layer has a plurality of inorganic particles, which are connected and fixed by a composite binder including a particulate polymer binder and an interpenetrating polymer network (IPN)-type binder having no melting point and having a thermal decomposition temperature of 300° C. or higher; and a lithium secondary battery including the same.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: December 12, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Hye Jin Kim, Yun Bong Kim, Suji Lee, Won Sub Kwack, Kyu Young Cho
  • Patent number: 11840631
    Abstract: Provided are a polyimide-based film, a window cover film, and a display device including the same. In detail, provided is a polyimide-based film whose solubility in an ethyl cellosolve solvent satisfies the following Equation 1: ( FW 1 - FW 2 ) FW 1 × 100 ? 50 ? % [ Equation ? ? 1 ] wherein FW1 is a weight of an initial film before being immersed in a solvent, and FW2 is a weight of the film measured after the film is immersed in an ethyl cellosolve solvent, left at 60° C. for 2 hours, and cooled to room temperature, the solvent is removed, and the film is dried at 80° C. for 4 hours.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: December 12, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventor: Jong Nam Ahn
  • Patent number: 11837008
    Abstract: The present invention is to provide a touch sensor with a fingerprint sensor capable of making brightness uniform by removing a difference in brightness in a portion to which a touch sensor and the fingerprint sensor are applied, in which an output of a touch display device of uniform brightness may be obtained by applying dummy electrodes to a portion constituting the touch sensor to change a structure so that light transmittances of the fingerprint sensor and the touch sensor are the same as or similar to each other or controlling a portion at which the finger sensor is positioned in an entire region of a light emitting layer to be brighter than the rest portion by a control unit of touch display devices to which the fingerprint sensor according to various embodiments of the present invention is applied.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: December 5, 2023
    Assignees: SK Innovation Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Jun Hyung Kim, Sang Yoon Ji, Jang-Ung Park
  • Patent number: 11830992
    Abstract: In a method for regenerating a lithium precursor, a lithium-containing waste mixture is put into a reactor. An inside of the reactor is replaced with carbon dioxide. Temperature raising treatment is performed on the lithium-containing waste mixture and the carbon dioxide to produce lithium carbonate and a transition metal-containing mixture. The lithium precursor may be recovered with high yield and high efficiency through dry treatment using carbon dioxide.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: November 28, 2023
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yeon Hwa La, Dong Wook Ha
  • Patent number: 11814491
    Abstract: Provided are a transparent film, an optical material including the same, and a display device including the same.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: November 14, 2023
    Assignees: SK Innovation Co., Ltd., SK ie technology Co., Ltd.
    Inventors: Min Sang Park, Jin Hyung Park, Seung Min Jeon, Yoo Seock Hwang
  • Patent number: 11814590
    Abstract: Provided are a method of producing a lubricating base oil composition including a) reacting at least a part of waste plastic pyrolysis oil having a boiling point in a range higher than 340° C. to remove impurities and structurally isomerizing the oil; and b) hydroisomerizing at least a part of the product of step a), and a lubricating base oil composition produced therefrom. A lubricating base oil, which has more methyl branches than petroleum-based lubricating base oil, to have improved low-temperature properties may be provided.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: November 14, 2023
    Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
    Inventors: Hee Jung Jeon, Seung Woo Lee, Yoon Kyung Lee, Ho Won Lee, Yeon Ho Kim, Ka Young Kim, Ok Youn Kim, Young Moo Park
  • Patent number: 11814589
    Abstract: Provided is a technology to convert an oil having a high content of Cl into a solvent. Impurities such as Cl, S, N, and metals are removed from an oil having a boiling point of 340° C. or lower in a waste oil having a high content of Cl, and hydrogenation is carried out to recover an oil, and the oil may be applied as a solvent. Separation by boiling points to meet the properties of the solvent product is performed, a solid acid material and an oil having a high Cl content are mixed, impurities are removed by a heat treatment at a high temperature, and hydrogenation is carried out with a metal oxide catalyst, thereby manufacturing a solvent product.
    Type: Grant
    Filed: April 20, 2022
    Date of Patent: November 14, 2023
    Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
    Inventors: Do Kyoung Kim, Ka Young Kim, Jeong Eop Choi, Ok Youn Kim, Hee Soo Kim, Young Moo Park, Ho Won Lee, Jae Suk Choi, Hee Jung Jeon
  • Publication number: 20230358908
    Abstract: Disclosed are a method and apparatus for estimating S-wave velocities by learning well logs, whereby the method includes a model formation step of forming an S-wave estimation model to output S-wave velocities corresponding to measured depth when the well logs are input based on train data sets including train data having values of multiple factors included in the well logs, the values being arranged corresponding to measured depth, and label data having S-wave velocities corresponding to measured depth as answers, and an S-wave velocity estimation step of inputting unseen data having values of multiple factors included in well logs acquired from a well at which S-wave velocities are to be estimated, the values being arranged corresponding to measured depth, to the S-wave estimation model to estimate S-wave velocities corresponding to measured depth.
    Type: Application
    Filed: July 13, 2023
    Publication date: November 9, 2023
    Applicants: SK INNOVATION CO., LTD., SK EARTHON CO., LTD.
    Inventors: Seungjoon CHA, Youngki CHOI, Hee Jeong JANG, Kyoung Jin LEE, Hyunjong CHO