Patents by Inventor Kaoru Tsuyuki

Kaoru Tsuyuki 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).

  • Method for producing peroxymonosulfuric acid and apparatus for continuously producing peroxymonosulfuric acid
    Patent number: 9988269
    Abstract: The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80° C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: June 5, 2018
    Assignee: MITSUBISHI GAS CHEMICAL CO., INC.
    Inventors: Kiyoshi Yoshida, Tetsuo Koshitsuka, Kaoru Tsuyuki, Wakana Uesugi
  • METHOD FOR PRODUCING PEROXYMONOSULFURIC ACID AND APPARATUS FOR CONTINUOUSLY PRODUCING PEROXYMONOSULFURIC ACID
    Publication number: 20160046490
    Abstract: The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80° C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.
    Type: Application
    Filed: October 1, 2015
    Publication date: February 18, 2016
    Inventors: Kiyoshi YOSHIDA, Tetsuo KOSHITSUKA, Kaoru TSUYUKI, Wakana UESUGI
  • Method for producing peroxymonosulfuric acid and apparatus for continuously producing peroxymonosulfuric acid
    Patent number: 9181094
    Abstract: The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80° C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: November 10, 2015
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Kiyoshi Yoshida, Tetsuo Koshitsuka, Kaoru Tsuyuki, Wakana Uesugi
  • METHOD FOR PRODUCING PEROXYMONOSULFURIC ACID AND APPARATUS FOR CONTINUOUSLY PRODUCING PEROXYMONOSULFURIC ACID
    Publication number: 20100112094
    Abstract: The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80° C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.
    Type: Application
    Filed: October 18, 2007
    Publication date: May 6, 2010
    Inventors: Kiyoshi Yoshida, Tetsuo Koshitsuka, Kaoru Tsuyuki, Wakana Uesugi
  • Flux washing agent
    Patent number: 5693599
    Abstract: A flux washing agent which comprises an aqueous solution containing a quaternary ammonium salt and hydrazine is disclosed. The flux washing agent is used in the production of printed circuit boards and the like. The flux washing agent has a washing ability, and a property to suppress etching of solder which are comparable with those of Flon 113 and trichloroethylene heretofore used as flux washing agents. Furthermore, the flux washing agent is safe, does not cause environmental pollution and has an excellent rinsing property.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: December 2, 1997
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tetsuo Aoyama, Toshio Kondoh, Toshihiko Kobayashi, Kaoru Tsuyuki
  • Process for recovering a reaction product while preventing decomposition of the catalyst
    Patent number: 4381221
    Abstract: In a process for recovering an aliphatic carboxylic acid and/or an ester thereof by distilling a liquid mixture containing the aliphatic carboxylic acid and/or the ester thereof and a catalyst of a metal of Group VIII of the periodic table of elements, the improvement wherein the distillation is carried out in the presence of carbon monoxide at a partial pressure of at least 0.01 kg/cm.sup.2 (absolute) in the distillation system to prevent the decomposition of said catalyst.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: April 26, 1983
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tomiya Isshiki, Hisashi Yoshino, Kaoru Tsuyuki
  • Process for producing hydrazine sulfate
    Patent number: 4239741
    Abstract: Hydrazine sulfate having a relatively large particle diameter and a high purity is produced by hydrolysis of benzophenoneazines by sulfuric acid having a concentration of 75% by weight or less in an amount of 1.1 times by mole or more the stoichiometric amount in a very high conversion and a high yield with less operational loss.
    Type: Grant
    Filed: October 27, 1978
    Date of Patent: December 16, 1980
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tomiya Isshiki, Tetsuo Tomita, Toshiaki Kozaki, Osamu Aoki, Mitsuo Abe, Norio Takeda, Mitsuo Miura, Yoshiyuki Aoki, Takao Kondo, Kaoru Tsuyuki