Patents by Inventor Takeharu Sasaki

Takeharu Sasaki 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).

  • Publication number: 20210155573
    Abstract: A method is provided for collecting a compound of formula (III) (in which R31 is a monovalent to trivalent organic group and n31 is an integer of 1 to 3) from a liquid phase component that is formed as a by-product in a method for producing a compound of general formula (I) (in which R11 is a monovalent to trivalent organic group and n 11 is an integer of 1 to 3), wherein the collection method contains steps (1) to (3) or steps (A) and (B), and step (4). Step (1): a step for reacting the liquid phase component with at least one active hydrogen-containing compound in a reactor. Step (2): a step for returning a condensed liquid obtained by cooling gas phase components in the reactor to the reactor. Step (3): a step for discharging gas phase components that are not condensed in the step (2) to the outside of the reactor. Step (A): a step for mixing the liquid phase component, water, and a compound of general formula (III). Step (B): a step for reacting the liquid phase component with water inside the reactor.
    Type: Application
    Filed: December 27, 2018
    Publication date: May 27, 2021
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhisa MIYAKE, Masaaki SHINOHATA, Yusuke SAKURAI, Yusuke ISHII, Takeharu SASAKI
  • Patent number: 10968168
    Abstract: An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 6, 2021
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhisa Miyake, Koichi Nakaoka, Tsubasa Uematsu, Yusuke Sakurai, Yusuke Ishii, Kazuhiro Takagaki, Takeharu Sasaki, Yuji Kosugi, Atsushi Ohkubo, Masaaki Shinohata
  • Publication number: 20200115327
    Abstract: An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
    Type: Application
    Filed: May 15, 2018
    Publication date: April 16, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhisa MIYAKE, Koichi NAKAOKA, Tsubasa UEMATSU, Yusuke SAKURAI, Yusuke ISHII, Kazuhiro TAKAGAKI, Takeharu SASAKI, Yuji KOSUGI, Atsushi OHKUBO, Masaaki SHINOHATA
  • Patent number: 10118110
    Abstract: The present invention relates to a reaction method comprising a step of supplying a liquid containing at least one raw material compound and a low-boiling compound having a standard boiling point lower than a standard boiling point of the raw material compound to a flow channel, a step of heating the liquid to produce a liquid reaction product and a gas component by a reaction of the raw material compound, and a step of separating a liquid phase containing the reaction product from a gas phase containing the gas component and the low-boiling compound.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: November 6, 2018
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Masaaki Shinohata, Takeharu Sasaki, Nobuhisa Miyake
  • Publication number: 20160166950
    Abstract: The present invention relates to a reaction method comprising a step of supplying a liquid containing at least one raw material compound and a low-boiling compound having a standard boiling point lower than a standard boiling point of the raw material compound to a flow channel, a step of heating the liquid to produce a liquid reaction product and a gas component by a reaction of the raw material compound, and a step of separating a liquid phase containing the reaction product from a gas phase containing the gas component and the low-boiling compound.
    Type: Application
    Filed: July 30, 2014
    Publication date: June 16, 2016
    Applicant: Asahi Kasei Chemicals Corporation
    Inventors: Masaaki Shinohata, Takeharu Sasaki, Nobuhisa Miyake