Patents by Inventor Norifumi Hagiya

Norifumi Hagiya 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: 20170291870
    Abstract: The present invention relates to an amide compound solution comprising an amide compound and a surfactant. More specifically, the invention relates to an amide compound solution comprising amide compound, and 2.7˜20 mg of a cationic surfactant per 1 kg of the amide compound or 0.01˜10 mg of a C15˜C20 carboxylic acid or its salt as an anionic surfactant per 1 kg of the amide compound. The present invention provides an amide compound solution which is manufactured using a biocatalyst and which has a low level of foaming, and thereby improving the operability and yield when manufacturing an amide compound-based polymer.
    Type: Application
    Filed: February 15, 2016
    Publication date: October 12, 2017
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto KANO, Norifumi HAGIYA
  • Patent number: 9370571
    Abstract: There is provided an aqueous acrylamide solution including 2,2,6,6-tetramethylpiperidine 1-oxyl in the ratio of 2 to 100 mg and manganese ions in the ratio of 0.2 to 2.0 mg per 1 kg of acrylamide. According to the present invention, an aqueous acrylamide solution having favorable quality and high stability with suppressed polymerization of acrylamide, a stabilizer used therefore, and a stabilization method can be provided.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: June 21, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Patent number: 9102590
    Abstract: There is provided a method for producing an aqueous acrylamide solution by producing acrylamide by reacting a composition including acrylonitrile with water, in which the composition including acrylonitrile includes 20 to 80 mg of methacrylonitrile per 1 kg of the total weight of the composition including acrylonitrile. According to the present invention, a production method allowing stable obtainment of an aqueous acrylamide solution can be provided as polymerization of the acrylamide can be suppressed without causing a decreas+455e in quality.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: August 11, 2015
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Patent number: 9057084
    Abstract: There is provided a method for producing an aqueous acrylamide solution by reacting a composition including acrylonitrile with water to produce acrylamide, in which the composition including acrylonitrile includes 3 to 15 mg of propionitrile per 1 kg of the total weight of the composition including acrylonitrile. According to the present invention, a production method with which it is possible to suppress acrylamide polymerization without lowering quality and thereby obtain a stable aqueous acrylamide solution can be provided.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: June 16, 2015
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Patent number: 9029587
    Abstract: There is provided a method for producing an aqueous acrylamide solution by reacting a composition including acrylonitrile with water to produce acrylamide, in which the composition including acrylonitrile includes 3 to 15 mg of propionitrile per 1 kg of the total weight of the composition including acrylonitrile. According to the present invention, a production method with which it is possible to suppress acrylamide polymerization without lowering quality and thereby obtain a stable aqueous acrylamide solution can be provided.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: May 12, 2015
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Patent number: 8937199
    Abstract: The present invention provides a process for stabilizing an aqueous acrylamide solution. The present invention also provides a stable aqueous acrylamide solution containing acetaldehyde at a weight ratio relative to acrylamide of 1.5 mg/Kg to 4 mg/Kg.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: January 20, 2015
    Assignee: Mistubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Publication number: 20140106415
    Abstract: There is provided a method for producing an aqueous acrylamide solution by producing acrylamide by reacting a composition including acrylonitrile with water, in which the composition including acrylonitrile includes 20 to 80 mg of methacrylonitrile per 1 kg of the total weight of the composition including acrylonitrile. According to the present invention, a production method allowing stable obtainment of an aqueous acrylamide solution can be provided as polymerization of the acrylamide can be suppressed without causing a decreas+455e in quality.
    Type: Application
    Filed: May 21, 2012
    Publication date: April 17, 2014
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Publication number: 20140087434
    Abstract: There is provided a method for producing an aqueous acrylamide solution by reacting a composition including acrylonitrile with water to produce acrylamide, in which the composition including acrylonitrile includes 3 to 15 mg of propionitrile per 1 kg of the total weight of the composition including acrylonitrile. According to the present invention, a production method with which it is possible to suppress acrylamide polymerization without lowering quality and thereby obtain a stable aqueous acrylamide solution can be provided.
    Type: Application
    Filed: May 21, 2012
    Publication date: March 27, 2014
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Publication number: 20140080914
    Abstract: There is provided an aqueous acrylamide solution including 2,2,6,6-tetramethylpiperidine 1-oxyl in the ratio of 2 to 100 mg and manganese ions in the ratio of 0.2 to 2.0 mg per 1 kg of acrylamide. According to the present invention, an aqueous acrylamide solution having favorable quality and high stability with suppressed polymerization of acrylamide, a stabilizer used therefore, and a stabilization method can be provided.
    Type: Application
    Filed: May 21, 2012
    Publication date: March 20, 2014
    Applicant: Mitsubuishi Rayon Co., Ltd.
    Inventors: Makoto Kanou, Norifumi Hagiya
  • Publication number: 20120316362
    Abstract: The present invention provides a process for stabilizing an aqueous acrylamide solution. The present invention also provides a stable aqueous acrylamide solution containing acetaldehyde at a weight ratio relative to acrylamide of 1.5 mg/Kg to 4 mg/Kg.
    Type: Application
    Filed: February 21, 2011
    Publication date: December 13, 2012
    Inventors: Makoto Kanou, Norifumi Hagiya