Patents by Inventor Akiko Miki

Akiko Miki 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: 11958799
    Abstract: In a method for producing hydrogen and carboxylic acid, a primary alcohol of 1 to 7 carbon atoms and water are reacted by being continuously introduced into a flow reactor packed with a solid catalyst consisting of an alloy of ruthenium and tin on a support and passed through the reactor under temperature and pressure conditions at which the water assumes a gaseous state. This method enables hydrogen and carboxylic acid to be produced in a high yield or at a high purity from a primary alcohol and water in a short time and by simple operations.
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: April 16, 2024
    Assignees: KYOTO UNIVERSITY, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Haruo Kawamoto, Eiji Minami, Yuanyuan Zhao, Takashi Nomura, Kazuto Kobayashi, Akiko Miki
  • Publication number: 20230365719
    Abstract: There is provided a method for efficiently produce hydroxypropyl methyl cellulose acetate succinate (HPMCAS) having excellent flowability, where acetic acid in a reaction product mixture subjected to a wash and recovery step can be reduced. More specifically, there is provided a method for producing HPMCAS including an esterification step of esterifying hydroxypropyl methyl cellulose (HPMC) with acetic anhydride and succinic anhydride in acetic acid as a solvent to obtain a reaction product solution containing HPMCAS; a water addition step of adding water to the reaction product solution to obtain a water-added reaction product solution; an acetic acid removal step of removing at least a portion of both the solvent acetic acid and acetic acid derived from the acetic anhydride from the water-added reaction product solution to obtain a mixture having an acetic acid content reduced; and a wash and recovery step of washing the mixture and recovering the HPMCAS.
    Type: Application
    Filed: July 19, 2023
    Publication date: November 16, 2023
    Inventors: Akiko Miki, Taishi Kitaguchi, Akira Kitamura, Mitsuo Narita
  • Patent number: 11767371
    Abstract: There is provided a method for efficiently produce hydroxypropyl methyl cellulose acetate succinate (HPMCAS) having excellent flowability, where acetic acid in a reaction product mixture subjected to a wash and recovery step can be reduced. More specifically, there is provided a method for producing HPMCAS including an esterification step of esterifying hydroxypropyl methyl cellulose (HPMC) with acetic anhydride and succinic anhydride in acetic acid as a solvent to obtain a reaction product solution containing HPMCAS; a water addition step of adding water to the reaction product solution to obtain a water-added reaction product solution; an acetic acid removal step of removing at least a portion of both the solvent acetic acid and acetic acid derived from the acetic anhydride from the water-added reaction product solution to obtain a mixture having an acetic acid content reduced; and a wash and recovery step of washing the mixture and recovering the HPMCAS.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: September 26, 2023
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Akiko Miki, Taishi Kitaguchi, Akira Kitamura, Mitsuo Narita
  • Publication number: 20230138638
    Abstract: In a method for producing hydrogen and carboxylic acid, a primary alcohol of 1 to 7 carbon atoms and water are reacted by being continuously introduced into a flow reactor packed with a solid catalyst consisting of an alloy of ruthenium and tin on a support and passed through the reactor under temperature and pressure conditions at which the water assumes a gaseous state. This method enables hydrogen and carboxylic acid to be produced in a high yield or at a high purity from a primary alcohol and water in a short time and by simple operations.
    Type: Application
    Filed: October 14, 2022
    Publication date: May 4, 2023
    Applicants: Kyoto University, Shin-Etsu Chemical Co., Ltd.
    Inventors: Haruo KAWAMOTO, Eiji MINAMI, Yuanyuan ZHAO, Takashi NOMURA, Kazuto KOBAYASHI, Akiko MIKI
  • Publication number: 20230067889
    Abstract: A method for producing a sugar anhydride, said method comprising: (1) a step for conducting a first heat treatment by heating a polysaccharide having a reducing end at 130-350° C. in the presence of an alcohol compound having 1-10 carbon atoms and not having an acetal structure; (2) a step for conducting a second heat treatment by heating the polysaccharide having been heated in the first heat treatment and thus thermally decomposing the polysaccharide to thereby give a gaseous sugar anhydride, without forming a char or with forming a filmy char, and without generating carbon monoxide or with regulating the generation amount of carbon monoxide, if any, to not more than 5 parts by mass per 100 parts by mass of the absolute dry mass of the polysaccharide; and (3) a collection step for cooling the gaseous sugar anhydride to a temperature equal to or lower than the boiling point thereof and then collecting the same. According to this method, a sugar anhydride can be easily produced at a high yield.
    Type: Application
    Filed: February 26, 2021
    Publication date: March 2, 2023
    Applicants: KYOTO UNIVERSITY, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Haruo KAWAMOTO, Eiji MINAMI, Takashi NOMURA, Hinano MIZUNO, Kazuto KOBAYASHI, Akiko MIKI
  • Publication number: 20220106460
    Abstract: There is provided a method for efficiently produce hydroxypropyl methyl cellulose phthalate (HPMCP) having excellent flowability, where acetic acid in a reaction product mixture subjected to a wash and recovery step can be reduced. More specifically, there is provided a method for producing HPMCP including an esterification step of esterifying hydroxypropyl methyl cellulose (HPMC) with phthalic anhydride in acetic acid as a solvent to obtain a reaction product solution containing HPMCP; a water addition step of adding water to the reaction product solution to obtain a water-added reaction product solution; an acetic acid removal step of removing at least a portion of the acetic acid from the water-added reaction product solution to obtain a mixture having an acetic acid content reduced; and a wash and recovery step of washing the mixture and recovering the HPMCP.
    Type: Application
    Filed: September 24, 2021
    Publication date: April 7, 2022
    Inventors: Akiko Miki, Taishi Kitaguchi, Akira Kitamura, Mitsuo Narita
  • Publication number: 20220106410
    Abstract: There is provided a method for efficiently produce hydroxypropyl methyl cellulose acetate succinate (HPMCAS) having excellent flowability, where acetic acid in a reaction product mixture subjected to a wash and recovery step can be reduced. More specifically, there is provided a method for producing HPMCAS including an esterification step of esterifying hydroxypropyl methyl cellulose (HPMC) with acetic anhydride and succinic anhydride in acetic acid as a solvent to obtain a reaction product solution containing HPMCAS; a water addition step of adding water to the reaction product solution to obtain a water-added reaction product solution; an acetic acid removal step of removing at least a portion of both the solvent acetic acid and acetic acid derived from the acetic anhydride from the water-added reaction product solution to obtain a mixture having an acetic acid content reduced; and a wash and recovery step of washing the mixture and recovering the HPMCAS.
    Type: Application
    Filed: September 24, 2021
    Publication date: April 7, 2022
    Inventors: Akiko Miki, Taishi Kitaguchi, Akira Kitamura, Mitsuo Narita