Patents by Inventor Young Sub KEUM

Young Sub KEUM 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).

  • Method of preparing alumina catalyst, alumina catalyst prepared using same, and method of preparing propylene using alumina catalyst
    Patent number: 11801488
    Abstract: A method of preparing an alumina catalyst including: performing primary calcination of an alumina precursor at a primary calcination temperature to form a mixed-phase alumina including 1% to 15% by weight of alpha-alumina, 60% to 95% by weight of theta-alumina, and 4% to 25% by weight of delta-alumina; steam-treating the mixed-phase alumina with water vapor at a steam-treating temperature lower than the primary calcination temperature to form activated mixed-phase alumina; and performing secondary calcination of the activated mixed-phase alumina at a secondary calcination temperature higher than the steam treatment temperature and lower than the primary calcination temperature after step S2. An alumina catalyst prepared using the method, and a method of preparing propylene using the alumina catalyst.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: October 31, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Young Sub Keum, Dae Heung Choi, Joo Young Cheon, Hyeon Bin Kim
  • METHOD OF PREPARING ALUMINA CATALYST, ALUMINA CATALYST PREPARED USING SAME, AND METHOD OF PREPARING PROPYLENE USING ALUMINA CATALYST
    Publication number: 20220314197
    Abstract: A method of preparing an alumina catalyst including: performing primary calcination of an alumina precursor at a primary calcination temperature to form a mixed-phase alumina including 1% to 15% by weight of alpha-alumina, 60% to 95% by weight of theta-alumina, and 4% to 25% by weight of delta-alumina; steam-treating the mixed-phase alumina with water vapor at a steam-treating temperature lower than the primary calcination temperature to form activated mixed-phase alumina; and performing secondary calcination of the activated mixed-phase alumina at a secondary calcination temperature higher than the steam treatment temperature and lower than the primary calcination temperature after step S2. An alumina catalyst prepared using the method, and a method of preparing propylene using the alumina catalyst.
    Type: Application
    Filed: November 17, 2020
    Publication date: October 6, 2022
    Inventors: Young Sub Keum, Dae Heung Choi, Joo Young Cheon, Hyeon Bin Kim
  • DEHYDRATION CATALYST, METHOD FOR PREPARING THE SAME, AND METHOD OF PREPARING ALKENE USING THE SAME
    Publication number: 20220258132
    Abstract: The present disclosure relates to a dehydration catalyst, a method for preparing the same, and a method for preparing an alkene using the same. More particularly, the present invention relates to a dehydration catalyst that is mixed-phase alumina including 1 to 18% by weight of alpha-alumina, 65 to 95% by weight of theta-alumina, and 4 to 34% by weight of delta-alumina, a method for preparing the dehydration catalyst, and a method for preparing an alkene using the dehydration catalyst.
    Type: Application
    Filed: November 16, 2020
    Publication date: August 18, 2022
    Inventors: Hyeon Bin KIM, Joo Young CHEON, Young Sub KEUM, Dae Heung CHOI