Patents by Inventor Hang-Duk Roh

Hang-Duk Roh 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: 10961390
    Abstract: Provided is a binder composition including polylysine and at least one reducing sugar or a derivative thereof, wherein the polylysine has, in a 1H NMR spectrum thereof, a first peak at 3.2 ppm to 3.4 ppm and a second peak at 3.8 ppm to 4.0 ppm, wherein a ratio (A:B) of an area of the first peak (A) to an area of the second peak (B) is 70:30 to 98:2.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: March 30, 2021
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Ji Eun Kim, Chang Suk Lee, Jun Ok Moon, Young Lyeol Yang, Chang Yub Oh, Hang Duk Roh, Do Yong Sim, Kwang Myung Cho, Jin Woo Choi
  • Publication number: 20200157344
    Abstract: Provided is a binder composition including polylysine and at least one reducing sugar or a derivative thereof, wherein the polylysine has, in a 1H NMR spectrum thereof, a first peak at 3.2 ppm to 3.4 ppm and a second peak at 3.8 ppm to 4.0 ppm, wherein a ratio (A:B) of an area of the first peak (A) to an area of the second peak (B) is 70:30 to 98:2.
    Type: Application
    Filed: April 13, 2018
    Publication date: May 21, 2020
    Inventors: Ji Eun KIM, Chang Suk LEE, Jun Ok MOON, Young Lyeol YANG, Chang Yub OH, Hang Duk ROH, Do Yong SIM, Kwang Myung CHO, Jin Woo CHOI
  • Patent number: 10196661
    Abstract: The present invention relates to the novel strain Pholiota adiposa SKU714, a method for producing cellulase from the strain and a method for saccharifying cellulose using the produced cellulase. Since the cellulase produced by the novel strain according to the present invention exhibits better saccharification yield than the existing saccharification enzymes, it can be used in various applications, including bioenergy production, textile industry, papermaking industry, detergent industry, feed industry, food industry, production of low-calorie foods, fermentation of food wastes, or the like.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 5, 2019
    Assignee: SK CHEMICALS CO., LTD.
    Inventors: Jung Kul Lee, Tae Su Kim, Sujit Sadashiv Jagtap, Min Ho Cha, Jong In Lee, Hang Duk Roh
  • Publication number: 20170226548
    Abstract: The present invention relates to the novel strain Pholiota adiposa SKU714, a method for producing cellulase from the strain and a method for saccharifying cellulose using the produced cellulase. Since the cellulase produced by the novel strain according to the present invention exhibits better saccharification yield than the existing saccharification enzymes, it can be used in various applications, including bioenergy production, textile industry, papermaking industry, detergent industry, feed industry, food industry, production of low-calorie foods, fermentation of food wastes, or the like.
    Type: Application
    Filed: April 10, 2017
    Publication date: August 10, 2017
    Inventors: Jung Kul LEE, Tae Su KIM, Sujit Sadashiv Jagtap, Min Ho CHA, Jong In LEE, Hang Duk ROH
  • Publication number: 20150203808
    Abstract: The present invention relates to the novel strain Pholiota adiposa SKU714, a method for producing cellulase from the strain and a method for saccharifying cellulose using the produced cellulase. Since the cellulase produced by the novel strain according to the present invention exhibits better saccharification yield than the existing saccharification enzymes, it can be used in various applications, including bioenergy production, textile industry, papermaking industry, detergent industry, feed industry, food industry, production of low-calorie foods, fermentation of food wastes, or the like.
    Type: Application
    Filed: February 21, 2013
    Publication date: July 23, 2015
    Inventors: Jung Kul Lee, Tae Su Kim, Sujit Sadashiv Jagtap, Min Ho Cha, Jong In Lee, Hang Duk Roh
  • Patent number: 7951967
    Abstract: A method and an apparatus for preparing fatty acid alkyl ester for bio-diesels are disclosed, wherein fatty acid, specifically fatty acid distillate reacts with alcohol, without a catalyst. The method does not require the purification process of the catalyst and glycerin, and has the superior conversion ratio of fatty acid. The method for preparing fatty acid alkyl ester for bio-diesel fuels comprises the step of esterifying fatty acid raw material with alcohol, under a temperature of 200 to 350° C. and a pressure of atmospheric pressure to 10 bar. The apparatus for preparing fatty acid alkyl ester for bio-diesel fuels, comprises: the first reactor for esterifying fatty acid raw material with alcohol under a temperature of 200° C. to 350° C. and a pressure of atmospheric pressure to 10 bar and for converting 80 to 90% of total fatty acid into fatty acid alkyl ester; and the second reactor for converting remaining fatty acid unconverted at the first reactor into fatty acid alkyl ester.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: May 31, 2011
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Shin-ho Chun, Hyun-Jun Cho, Hang-Duk Roh, Jae-Bong Lim, Jong-In Lee, Chan-Woo Moon, Byung-Hui Kim
  • Publication number: 20100228042
    Abstract: A method and an apparatus for preparing fatty acid alkyl ester for bio-diesels are disclosed, wherein fatty acid, specifically fatty acid distillate reacts with alcohol, without a catalyst. The method does not require the purification process of the catalyst and glycerin, and has the superior conversion ratio of fatty acid. The method for preparing fatty acid alkyl ester for bio-diesel fuels comprises the step of esterifying fatty acid raw material with alcohol, under a temperature of 200 to 35O0 C and a pressure of atmospheric pressure to 10 bar.
    Type: Application
    Filed: April 28, 2006
    Publication date: September 9, 2010
    Inventors: Shin-ho Chun, Hyun-Jun Cho, Hang-Duk Roh, Jae-Bong Lim, Jong-In Lee, Chan-Woo Moon, Byung-Hui Kim
  • Patent number: 7153998
    Abstract: The present invention relates to a method for refining 2,6-naphthalene dicarboxylic acid, and particularly to a method for refining 2,6-naphthalene dicarboxylic acid comprising recrystallizing crude 2,6-naphthalene dicarboxylic acid in the form of an amine salt using a solvent comprising a protic polar solvent selected from the group consisting of an alcohol, water, and a mixture thereof, and an acetate. In accordance with the invention, 2,6-naphthalene dicarboxylic acid can be obtained with excellent purity and color, and at the same time, it can be obtained in an economical and environmentally friendly way because the acetate, which is a byproduct of the oxidation process, is used as a solvent.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: December 26, 2006
    Assignee: SK Chemical Co., Ltd.
    Inventors: Jong-In Lee, Hyun-Sup Shim, Yong-Jun Shin, Hang-Duk Roh
  • Publication number: 20060167310
    Abstract: The present invention relates to a method for the preparation of naphthalene dicarboxylic acid, and more particularly, to a method for the preparation of naphthalene dicarboxylic acid by oxidizing dimethylnaphthalene with oxygen in air in the presence of acetic acid solvent using the metal catalysts of cobalt and manganese, and using bromine as a reaction initiator, wherein the temperature of said oxidation reaction is 155 to 180° C. The method for the preparation of naphthalene dicarboxylic acid of the invention enables the preparation of naphthalene dicarboxylic acid having high purity with a high yield in an economical way at a low temperature.
    Type: Application
    Filed: May 2, 2003
    Publication date: July 27, 2006
    Inventors: Jong-In Lee, Han-Seok Kim, Byung-Hee Kim, Hang-Duk Roh, Youn-Seo Lee, Joon-Sang Jo
  • Publication number: 20050261518
    Abstract: The present invention relates to a method for refining 2,6-naphthalene dicarboxylic acid, and particularly to a method for refining 2,6-naphthalene dicarboxylic acid comprising recrystallizing crude 2,6-naphthalene dicarboxylic acid in the form of an amine salt using a solvent comprising a protic polar solvent selected from the group consisting of an alcohol, water, and a mixture thereof, and an acetate. In accordance with the invention, 2,6-naphthalene dicarboxylic acid can be obtained with excellent purity and color, and at the same time, it can be obtained in an economical and environmentally friendly way because the acetate, which is a byproduct of the oxidation process, is used as a solvent.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 24, 2005
    Inventors: Jong-In Lee, Hyun-Sup Shim, Yong-Jun Shin, Hang-Duk Roh
  • Publication number: 20050215815
    Abstract: Disclosed is a method of producing trimellitic acid through the liquid-phase oxidation of pseudocumene in acetic acid. The oxidation comprises a) conducting a first oxidation using an initial oxidizing catalytic system at 120-200iÉ for 5-20 min in an oxidizing reactor, said initial oxidizing catalytic system comprising at least three compounds selected from the group consisting of cobalt compound, manganese compound, zirconium compound and bromine compound; b) conducting a second oxidation in situ at 160-220iÉ for 30-60 min under addition of an additional catalytic system, said additional catalytic system comprising at least two compounds selected from the group consisting of cobalt compound, manganese compound, zirconium compound, and bromine compound; and c) completing the oxidation of pseudocumene at a temperature from 180 to 230iÉ for a time from 5 to 20 min without the addition of catalysts into the reactor. The pressure is adjusted in the range from 100 to 450 psig over the steps a), b) and c).
    Type: Application
    Filed: January 7, 2003
    Publication date: September 29, 2005
    Inventors: Hang-Duk Roh, Jong-In Lee, Hyun-Sup Shim, Byung-Hui Kim, Jun-Sang Cho, Yoon-Seo Lee
  • Patent number: 6310239
    Abstract: This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing and recovering the highly purified terephthalic acid, in accordance with the practice of this invention comprising the following procedurses: alkali weight-reduction waste water discharged from weight-reduction process in a polyester textile dyeing complex is dissolved in water, adsorbed to remove impurities, and through acid-neutralization, terephthalic acid of this invention may be obtained.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: October 30, 2001
    Assignee: Sunkyong Industries Co., Ltd.
    Inventors: Hang-Duk Roh, Dongmok Bae
  • Patent number: 6075163
    Abstract: This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing terephthalic acid in a high recovery rate with high purity in accordance with the practice of this invention comprising the following procedures: polyethylene terephthalate (hereinafter referred to as "PET") scrap is hydrolyzed with alkaline aqueous solution to give the slurry of terephthalic acid alkali metal/earth metal salt, then the particles of terephthalic acid formed from acid-neutralization are enlarged to recover terephthalic acid with high purity.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: June 13, 2000
    Assignee: Sunkyong Industries Co., Ltd.
    Inventors: Hang-Duk Roh, Dongmok Bae
  • Patent number: 6031128
    Abstract: This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process of manufacturing and recovering the highly purified terephthalic acid using an alkali weight-reduction waste water discharged from weight-reduction process in a polyester textile dyeing complex, in accordance with the practice of this invention comprising the following procedures: polyethylene terephthalate (hereinafter referred to "PET") waste scrap materials are hydrolyzed to prepare the slurry of disodium terephthalate. Then, said slurry dissolved in water is adsorbed to remove impurities, and followed by acid-neutralization to obtain terephthalic acid of this invention.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: February 29, 2000
    Assignee: Sunkyong Industries Co., Ltd.
    Inventors: Hang-Duk Roh, Dongmok Bae
  • Patent number: 5770770
    Abstract: The present invention is a reactive distillation process for methyl acetate hydrolysis comprising a rectifying section a reaction section and a stripping section. A water stream is fed into the upper portion of the rectifying or reaction zone and a methyl acetate stream is fed into the lower portion of the reaction zone which contains packings made of ion exchange resin. The products, acetic acid and methanol, are continuously produced from the bottom of the apparatus.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: June 23, 1998
    Assignee: Sunkyong Industries
    Inventors: Ki-Joo Kim, Hang Duk Roh