Patents by Inventor Yoshiyuki Koizumi

Yoshiyuki Koizumi 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: 11958878
    Abstract: The present invention establishes a molecular therapy for glycogen storage disease type Ia. The present invention provides an oligonucleotide of 15-30 bases comprising a nucleotide sequence complementary to die cDNA of G6PC gene with c.648G>T mutation, wherein the oligonucleotide comprises a sequence complementary to a region comprising any site between the 82nd to the 92nd nucleotide from the 5? end of exon 5 of the G6PC gene with c.648C>T mutation, a pharmacologically acceptable salt or solvate thereof. Also provided is a pharmaceutical drug comprising the oligonucleotide, a pharmacologically acceptable salt or solvate thereof (e.g., therapeutic drug for glycogen storage disease type Ia).
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 16, 2024
    Assignees: Daiichi Sankyo Company, Limited, Kobe Gakuin Educational Foundation
    Inventors: Makoto Koizumi, Yoshiyuki Onishi, Takeshi Masuda, Mitsuhiro Iwamoto, Yukiko Sekiguchi, Kentaro Ito, Shinnosuke Tsuji, Masafumi Matsuo
  • Patent number: 11577190
    Abstract: The present invention provides a method for purifying carbon dioxide gas characterized in that carbon dioxide gas containing at least one of 3-methylmercaptopropionaldehyde and acrolein is contacted with activated carbon to remove at least one of the 3-methylmercaptopropionaldehyde and acrolein. The present invention provides also a method for producing methionine comprising the purification step of the recovered carbon dioxide.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: February 14, 2023
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Ryosuke Iwasaki, Takuya Katayama, Norihito Omoto, Yoshiyuki Koizumi, Ryousuke Katagami
  • Patent number: 11192855
    Abstract: An object of the present invention is to provide a method for manufacturing methionine capable of achieving an improvement in ammonia removal efficiency. The manufacturing method of the present invention comprises a removal step of supplying a liquid containing a methionine salt, which is obtained by reacting 3-methylmercaptopropionaldehyde and hydrocyanic acid, or a compound obtained by reacting 3-methylmercaptopropionaldehyde and hydrocyanic acid, with carbon dioxide and ammonia to obtain a liquid containing 5-(2-methylmercaptoethyl)hydantoin and then hydrolyzing the 5-(2-methylmercaptoethyl)hydantoin, to a diffusion tower from an upper portion thereof while supplying a stripping gas to the diffusion tower from a lower portion thereof to remove ammonia contained in the liquid through stripping, and the stripping gas contains a process gas generated in a process of manufacturing methionine.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: December 7, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takao Mizuno, Daisuke Yamashita, Yoshiyuki Koizumi
  • Patent number: 11111213
    Abstract: The present provides a method for producing methionine which is characterized by a crystallization step in which carbon dioxide is introduced into a reaction solution containing an alkali salt of methionine which is obtained by hydrolyzing 5-[2-(methylthio)ethyl] imidazoline-2,4-dione in the presence of an alkali compound, thereby precipitating the methionine, and further comprises a step of adding waste methionine to the reaction solution. The method of production of the present invention can improve a yield in the production of methionine.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: September 7, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshitaka Satoh, Norihito Omoto, Yoshiyuki Koizumi, Naoya Yamashiro, Ryousuke Katagami
  • Patent number: 10995065
    Abstract: The present invention addresses the problem of providing a method for producing purified methionine, the method being capable of preventing the caking of methionine. The present invention pertains to a method for producing purified methionine from crude methionine, the method comprising (1) a step for obtaining a wet cake of washed crude methionine, (2) a step for adjusting the pH of the wet cake, and (3) a step for drying the wet cake after the pH adjustment, wherein the pH of the wet cake after the pH adjustment is 5.2-6.1.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: May 4, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiyuki Koizumi, Naoya Yamashiro, Akira Morimoto
  • Patent number: 10981735
    Abstract: The present invention provides a method of airflow transportation of methionine that can minimize the crushing of methionine, which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas. In the method of airflow transportation of methionine of the present invention, if the D50 of methionine is in the range of 150 to 425 ?m, the increase rate of the fine powder can be suppressed to 1.5% or less by maintaining the mixing ratio at 4 to 10 kg-methionine/kg-carrier gas, and can be suppressed to 1% or less by maintaining the mixing ratio at 5 to 10 kg-methionine/kg-carrier gas.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 20, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiyuki Koizumi, Naoya Yamashiro, Rikuri Uejima
  • Publication number: 20210101865
    Abstract: The present provides a method for producing methionine which is characterized by a crystallization step in which carbon dioxide is introduced into a reaction solution containing an alkali salt of methionine which is obtained by hydrolyzing 5-[2-(methylthio)ethyl] imidazoline-2,4-dione in the presence of an alkali compound, thereby precipitating the methionine, and further comprises a step of adding waste methionine to the reaction solution. The method of production of the present invention can improve a yield in the production of methionine.
    Type: Application
    Filed: April 27, 2018
    Publication date: April 8, 2021
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshitaka SATOH, Norihito OMOTO, Yoshiyuki KOIZUMI, Naoya YAMASHIRO, Ryousuke KATAGAMI
  • Patent number: 10961186
    Abstract: An object of the present invention is to provide a method for producing methionine enabling efficient recovery and use of ammonia from a gas generated by concentrating a mother liquor. This production method comprises a recovery step of introducing a gas generated in a mother liquor concentration step into a gas washing tower in which water is recycled and bringing the gas into contact with the water to recover ammonia contained in the gas, and a ratio of flow of the water to flow of the gas introduced into the gas washing tower is 2 or more in terms of mass ratio. The water discharged from the gas washing tower is preferably cooled before introduction into the gas washing tower.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: March 30, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Daisuke Yamashita, Yoshiyuki Koizumi
  • Publication number: 20210087139
    Abstract: An object of the present invention is to provide a method for manufacturing methionine capable of achieving an improvement in ammonia removal efficiency. The manufacturing method of the present invention comprises a removal step of supplying a liquid containing a methionine salt, which is obtained by reacting 3-methylmercaptopropionaldehyde and hydrocyanic acid, or a compound obtained by reacting 3-methylmercaptopropionaldehyde and hydrocyanic acid, with carbon dioxide and ammonia to obtain a liquid containing 5-(2-methylmercaptoethyl)hydantoin and then hydrolyzing the 5-(2-methylmercaptoethyl)hydantoin, to a diffusion tower from an upper portion thereof while supplying a stripping gas to the diffusion tower from a lower portion thereof to remove ammonia contained in the liquid through stripping, and the stripping gas contains a process gas generated in a process of manufacturing methionine.
    Type: Application
    Filed: December 18, 2018
    Publication date: March 25, 2021
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takao MIZUNO, Daisuke YAMASHITA, Yoshiyuki KOIZUMI
  • Publication number: 20210087000
    Abstract: The present invention provides a method of airflow transportation of methionine that can minimize the crushing of methionine, which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas. In the method of airflow transportation of methionine of the present invention, if the D50 of methionine is in the range of 150 to 425 ?m, the increase rate of the fine powder can be suppressed to 1.5% or less by maintaining the mixing ratio at 4 to 10 kg-methionine/kg-carrier gas, and can be suppressed to 1% or less by maintaining the mixing ratio at 5 to 10 kg-methionine/kg-carrier gas.
    Type: Application
    Filed: May 15, 2018
    Publication date: March 25, 2021
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiyuki KOIZUMI, Naoya YAMASHIRO, Rikuri UEJIMA
  • Patent number: 10954189
    Abstract: The present invention addresses the problem of providing a method for producing purified methionine, the method being capable of preventing the caking of methionine. The present invention pertains to a method for producing purified methionine from crude methionine, the method comprising (1) a step for obtaining a wet cake of washed crude methionine, (2) a step for adjusting the pH of the wet cake, and (3) a step for drying the wet cake after the pH adjustment, wherein the pH of the wet cake after the pH adjustment is 5.2-6.1.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: March 23, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiyuki Koizumi, Naoya Yamashiro, Akira Morimoto
  • Patent number: 10829447
    Abstract: The present invention provides a method for producing methionine characterized by comprising a step of hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of an alkali compound to obtain a reaction solution containing an alkali salt of methionine, a step of precipitating methionine by introducing carbon dioxide into the reaction solution to obtain a first slurry containing the methionine, a step of allowing the first slurry to flow into a pressurized filter and obtaining the solid methionine and mother liquor from the first slurry, and a step of recovering carbon dioxide from the mother liquor. By the present production method, the carbon dioxide introduced in the crystallization step is suppressed from being released from the mother liquor, and the carbon dioxide can be recovered.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: November 10, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Norihito Omoto, Yoshitaka Satoh, Masayuki Morikawa, Yoshiyuki Koizumi, Naoya Yamashiro, Ryousuke Katagami
  • Publication number: 20200347015
    Abstract: An object of the present invention is to provide a method for producing methionine enabling efficient recovery and use of ammonia from a gas generated by concentrating a mother liquor. This production method comprises a recovery step of introducing a gas generated in a mother liquor concentration step into a gas washing tower in which water is recycled and bringing the gas into contact with the water to recover ammonia contained in the gas, and a ratio of flow of the water to flow of the gas introduced into the gas washing tower is 2 or more in terms of mass ratio. The water discharged from the gas washing tower is preferably cooled before introduction into the gas washing tower.
    Type: Application
    Filed: December 26, 2018
    Publication date: November 5, 2020
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Daisuke YAMASHITA, Yoshiyuki KOIZUMI
  • Publication number: 20200207708
    Abstract: The present invention addresses the problem of providing a method for producing purified methionine, the method being capable of preventing the caking of methionine. The present invention pertains to a method for producing purified methionine from crude methionine, the method comprising (1) a step for obtaining a wet cake of washed crude methionine, (2) a step for adjusting the pH of the wet cake, and (3) a step for drying the wet cake after the pH adjustment, wherein the pH of the wet cake after the pH adjustment is 5.2-6.1.
    Type: Application
    Filed: July 19, 2018
    Publication date: July 2, 2020
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiyuki KOIZUMI, Naoya YAMASHIRO, Akira MORIMOTO
  • Publication number: 20200188834
    Abstract: The present invention provides a method for purifying carbon dioxide gas characterized in that carbon dioxide gas containing at least one of 3-methylmercaptopropionaldehyde and acrolein is contacted with activated carbon to remove at least one of the 3-methylmercaptopropionaldehyde and acrolein. The present invention provides also a method for producing methionine comprising the purification step of the recovered carbon dioxide.
    Type: Application
    Filed: April 27, 2018
    Publication date: June 18, 2020
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Ryosuke IWASAKI, Takuya KATAYAMA, Norihito OMOTO, Yoshiyuki KOIZUMI, Ryousuke KATAGAMI
  • Publication number: 20200140379
    Abstract: The present invention provides a method for producing methionine which is characterized by comprising (1) a reaction step: a step of hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of an alkali compound to obtain a reaction solution containing an alkali salt of methionine, (2) a first crystallizing step: a step of introducing carbon dioxide into the reaction solution and precipitating methionine from the reaction solution to obtain the first crystal of methionine and the first crystal mother liquor, and (3) a second crystallizing step: a step in which after obtaining a slurry which contains precipitates containing the second crystals of methionine precipitated by introducing carbon dioxide to the first crystal mother liquor and the slurry was subjected to centrifugation to separate the second crystal of methionine and the second crystal mother liquor by a solid-liquid separation, and the precipitate remained in the obtained second crystal mother liquor is separated using a filter.
    Type: Application
    Filed: April 27, 2018
    Publication date: May 7, 2020
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Norihito OMOTO, Yoshitaka SATOH, Masayuki MORIKAWA, Yoshiyuki KOIZUMI, Naoya YAMASHIRO, Ryousuke KATAGAMI
  • Publication number: 20200079730
    Abstract: The present invention provides a method for producing methionine characterized by comprising a step of hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of an alkali compound to obtain a reaction solution containing an alkali salt of methionine, a step of precipitating methionine by introducing carbon dioxide into the reaction solution to obtain a first slurry containing the methionine, a step of allowing the first slurry to flow into a pressurized filter and obtaining the solid methionine and mother liquor from the first slurry, and a step of recovering carbon dioxide from the mother liquor. By the present production method, the carbon dioxide introduced in the crystallization step is suppressed from being released from the mother liquor, and the carbon dioxide can be recovered.
    Type: Application
    Filed: April 27, 2018
    Publication date: March 12, 2020
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Norihito OMOTO, Yoshitaka SATOH, Masayuki MORIKAWA, Yoshiyuki KOIZUMI, Naoya YAMASHIRO, Ryousuke KATAGAMI
  • Patent number: 9926101
    Abstract: Provided is a paper container for foods capable of being fabricated by heat sealing which does not absorb flavors, such as limonene, and capable of storing a long period at ordinary temperature. The laminated material for paper containers is composed of paper substrate layer/adhesive for paper layer/first adhesive for barrier layer/barrier layer/second adhesive for barrier layer/heat-sealable PET resin layer, has an oxygen gas barrier ability of 2.0 ml/m2·D·atm or less, and the heat-sealable PET resin layer is made having a crystal portion of less than 15%, non-crystal portion of 85% or more.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: March 27, 2018
    Assignees: NAKAMOTO PACKS CO., LTD., MIKUNISHIKO CO., LTD.
    Inventors: Yukio Kobayashi, Hitoshi Sasaki, Katsuro Sasauchi, Shingo Abe, Yoshiyuki Koizumi
  • Publication number: 20160075468
    Abstract: [Problem] To provide a paper container for foods capable of being fabricated by heat sealing which does not absorb flavors, such as limonene, and capable of storing a long period at ordinary temperature. [Solving Means] The laminated material for paper containers is composed of paper substrate layer/adhesive for paper layer/first adhesive for barrier layer/barrier layer/second adhesive for barrier layer/heat-sealable PET resin layer, has an oxygen gas barrier ability of 2.0 ml/m2·D·atm or less, and the heat-sealable PET resin layer is made having a crystal portion of less than 15%, non-crystal portion of 85% or more.
    Type: Application
    Filed: October 7, 2013
    Publication date: March 17, 2016
    Applicants: MIKUNISHIKO CO., LTD., NAKAMOTO PACKS CO., LTD.
    Inventors: Yukio KOBAYASHI, Hitoshi SASAKI, Katsuro SASAUCHI, Shingo ABE, Yoshiyuki KOIZUMI
  • Publication number: 20150038739
    Abstract: The object of the present invention is to provide a process for producing refined methionine in which the loss of methionine due to washing is reduced. The present invention relates to a process for producing refined methionine from crude methionine, comprising a step of washing crude methionine with the use of a wash water containing methionine.
    Type: Application
    Filed: February 26, 2013
    Publication date: February 5, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Junichi Nishida, Yoshiyuki Koizumi