Patents by Inventor Mayu SASAKI

Mayu 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).

  • Patent number: 11230513
    Abstract: A process of producing 1,3-butadiene includes: a first step of obtaining gases containing 1,3-butadiene by an oxidative dehydrogenation reaction of a raw material gas with a molecular oxygen-containing gas in the presence of a metal oxide catalyst, the raw material gas containing 1-butene and 2-butene and having a proportion of 2-butene to a sum of 1-butene and 2-butene, which is defined as 100% by volume, being not less than 50% by volume; a second step of cooling the produced gases obtained in the first step; and a third step of separating the produced gases having undergone the second step into molecular oxygen and inert gases and other gases containing 1,3-butadiene by selective absorption to an absorbing solvent, wherein the concentration of methyl vinyl ketone in the produced gases having been cooled in the second step is 0% by volume or more and not more than 0.03% by volume.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: January 25, 2022
    Assignees: JSR Corporation, ENEOS CORPORATION
    Inventors: Mayu Sugimoto, Yuichiro Sasaki, Sosuke Higuchi, Nobuhiro Kimura
  • Publication number: 20210210231
    Abstract: More accurate prediction of reactor water quality of a nuclear reactor is implemented. A device for prediction of reactor water quality of a nuclear reactor in a nuclear power plant is disclosed. The device stores a reactor water quality prediction model which is learned using learning data, and with which future reactor water quality is predicted. An explanatory variable of the reactor water quality prediction model includes a value in a predetermined period unit that is generated from data acquired in an operating nuclear power plant. The device generates the value in a predetermined period unit from data acquired in a target operating nuclear power plant, and acquires a predicted value of the reactor water quality in the target nuclear power plant based on the reactor water quality prediction model and the value in a predetermined period unit.
    Type: Application
    Filed: October 28, 2020
    Publication date: July 8, 2021
    Inventors: Hiroko SUKEDA, Naoshi USUI, Mayu SASAKI, Hideyuki HOSOKAWA, Tsuyoshi ITO
  • Publication number: 20210098142
    Abstract: A reactor water radioactivity concentration of a nuclear power plant can be predicted with high accuracy. First, a plant state quantity prediction value is calculated by using a physical model that describes plant state quantities of the power plant including a flow rate of feedwater and a metal corrosion product concentration in feedwater of the reactor water is calculated. Next, data for supervised learning is created, and the data for supervised learning includes the previously calculated plant state quantity prediction value and a plant state quantity such as the flow rate of feedwater, the metal corrosion product concentration in feedwater, a metal corrosion product concentration in reactor water, and a radioactive metal corrosion concentration of the reactor water in the reactor as input data and includes a radioactive metal corrosion concentration in the reactor water which is an actual measured value as output data, and a predictive model is trained.
    Type: Application
    Filed: September 17, 2020
    Publication date: April 1, 2021
    Inventors: Hideyuki HOSOKAWA, Tsuyoshi ITO, Hiroko SUKEDA, Mayu SASAKI, Naoshi USUI
  • Publication number: 20200312471
    Abstract: To provide a corrosion mitigation method for carbon steel pipe that can further reduce corrosion of the carbon steel pipe. In a BWR plant, oxygen is injected from an oxygen injection device 30 into a clean up system pipe 18 which is constituted by a Cr-containing carbon steel pipe containing Cr in a range of larger than 0.052 wt % and less than 0.4 wt % and being in communication with a RPV 3, and reactor water of 150° C. having a dissolved oxygen concentration of 30 ?g/L is generated. The reactor water is brought into contact with an inner surface of the clean up system pipe 18 to perform an oxidizing treatment on the inner surface, and an oxide film containing Cr is formed on the inner surface.
    Type: Application
    Filed: March 3, 2020
    Publication date: October 1, 2020
    Inventors: Kazushige ISHIDA, Masahiko TACHIBANA, Mayu SASAKI, Ryosuke SHIMIZU
  • Publication number: 20200248317
    Abstract: A film forming apparatus is connected to a carbon steel purification system piping of a BWR plant (S1). Formic acid (surface purification agent) is injected into a circulation piping of the film forming apparatus (S4). A surface purification agent aqueous solution containing 30000 ppm of formic acid is contacted with the inner surface of the purification system piping, and a large amount of Fe2+ is dissolved from the purification system piping, and a large amount of electrons are generated by this dissolution. Thereafter, a formic acid Ni aqueous solution is injected into the surface purification agent aqueous solution to produce a film forming aqueous solution (S5). The film forming aqueous solution storing the electrons is contacted with the inner surface of the purification system piping, and Ni ions incorporated into the inner surface are reduced by the electrons, and a Ni metal film is formed on the inner surface.
    Type: Application
    Filed: January 17, 2020
    Publication date: August 6, 2020
    Inventors: Tsuyoshi ITOU, Mayu SASAKI, Nobuyuki OTA, Hideyuki HOSOKAWA
  • Publication number: 20200055758
    Abstract: The present disclosure provides a method for relieving a corrosive environment of a boiling water reactor, the method including a step of injecting hydrogen and a noble metal compound into water to be replenished into the reactor pressure vessel during a period of a generating operation of a boiling water nuclear power plant including the reactor pressure vessel. In the method, the hydrogen is injected into water to be supplied into the reactor pressure vessel, and the noble metal compound is injected into water in a line of the boiling water nuclear power plant in which a concentration of oxygen or hydrogen peroxide is stoichiometrically higher than the concentration of hydrogen at which hydrogen undergoes a chemical reaction to turn to water.
    Type: Application
    Filed: September 20, 2019
    Publication date: February 20, 2020
    Inventors: Kazushige ISHIDA, Youichi WADA, Masahiko TACHIBANA, Nobuyuki OOTA, Ryosuke SHIMIZU, Mayu SASAKI
  • Patent number: 10457583
    Abstract: The present disclosure provides a method for relieving a corrosive environment of a boiling water reactor, the method including a step of injecting hydrogen and a noble metal compound into water to be replenished into the reactor pressure vessel during a period of a generating operation of a boiling water nuclear power plant including the reactor pressure vessel. In the method, the hydrogen is injected into water to be supplied into the reactor pressure vessel, and the noble metal compound is injected into water in a line of the boiling water nuclear power plant in which a concentration of oxygen or hydrogen peroxide is stoichiometrically higher than the concentration of hydrogen at which hydrogen undergoes a chemical reaction to turn to water.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: October 29, 2019
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Kazushige Ishida, Youichi Wada, Masahiko Tachibana, Nobuyuki Oota, Ryosuke Shimizu, Mayu Sasaki
  • Publication number: 20170287573
    Abstract: The present disclosure provides a method for relieving a corrosive environment of a boiling water reactor, the method including a step of injecting hydrogen and a noble metal compound into water to be replenished into the reactor pressure vessel during a period of a generating operation of a boiling water nuclear power plant including the reactor pressure vessel. In the method, the hydrogen is injected into water to be supplied into the reactor pressure vessel, and the noble metal compound is injected into water in a line of the boiling water nuclear power plant in which a concentration of oxygen or hydrogen peroxide is stoichiometrically higher than the concentration of hydrogen at which hydrogen undergoes a chemical reaction to turn to water.
    Type: Application
    Filed: January 30, 2017
    Publication date: October 5, 2017
    Inventors: Kazushige ISHIDA, Youichi WADA, Masahiko TACHIBANA, Nobuyuki OOTA, Ryosuke SHIMIZU, Mayu SASAKI