Patents by Inventor Kazuki UMEHARA

Kazuki UMEHARA 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 FOR MANUFACTURING CATALYST FOR MANUFACTURE OF VINYL ACETATE AND METHOD FOR MANUFACTURING VINYL ACETATE
    Publication number: 20230398523
    Abstract: A method for producing a vinyl acetate production catalyst containing a carrier, copper, palladium, gold, and an acetate, the method including in the following order: step 1) a step for impregnating the carrier with an alkaline solution; step 2) a step for contact-impregnating the carrier with a solution containing a compound containing copper, a compound containing palladium, and a compound containing gold; step 3) a step for performing reduction treatment; and step 4) a step for causing the carrier to carry the acetate.
    Type: Application
    Filed: August 3, 2021
    Publication date: December 14, 2023
    Applicant: Resonac Corporation
    Inventors: Kazuhiro KITAGAWA, Yasuhiro HOSOGI, Yasuhiro IWAMA, Kazuki UMEHARA
  • Fixed-bed multi-tubular reactor for producing alkenyl acetate
    Patent number: 11607656
    Abstract: A fixed-bed multi-tubular reactor for producing an alkenyl acetate by a gas phase catalytic oxidation reaction of a lower olefin, acetic acid and oxygen including a plurality of reaction tubes, a thermometer protection tube inserted into at least one of the plurality of reaction tubes, a thermometer inserted into the thermometer protection tube, and a shield disposed above the reaction tube into which the thermometer protection tube is inserted and attached to the thermometer protection tube, wherein an effective projection region of the shield entirely covers the inlet opening of the reaction tube into which the thermometer protection tube is inserted.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: March 21, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasuhiro Iwama, Maiko Ikushima, Kazuki Umehara, Mitsuru Tanaka, Toshiyuki Maki
  • FIXED-BED MULTI-TUBULAR REACTOR FOR PRODUCING ALKENYL ACETATE
    Publication number: 20220314181
    Abstract: A fixed-bed multi-tubular reactor for producing an alkenyl acetate by a gas phase catalytic oxidation reaction of a lower olefin, acetic acid and oxygen including a plurality of reaction tubes, a thermometer protection tube inserted into at least one of the plurality of reaction tubes, a thermometer inserted into the thermometer protection tube, and a shield disposed above the reaction tube into which the thermometer protection tube is inserted and attached to the thermometer protection tube, wherein an effective projection region of the shield entirely covers the inlet opening of the reaction tube into which the thermometer protection tube is inserted.
    Type: Application
    Filed: October 28, 2020
    Publication date: October 6, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuhiro IWAMA, Maiko IKUSHIMA, Kazuki UMEHARA, Mitsuru TANAKA, Toshiyuki MAKI