Patents by Inventor Shuji Itatani

Shuji Itatani 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).

  • Treatment method of composition containing fluorine-containing organic acid having carbon number of 2 to 7 and impurities
    Patent number: 10457625
    Abstract: A treatment method of at least partially removing impurities from a composition containing a fluorine-containing organic acid having the carbon number of 2 to 7 and impurities, the method including a flocculant mixing step of mixing the composition and a flocculant; and a separating step of separating a mixed phase obtained at the mixing step into a solid phase and a liquid phase.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: October 29, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mihoko Ohashi, Shuji Itatani, Atsuko Tai
  • TREATMENT METHOD OF COMPOSITION CONTAINING FLUORINE-CONTAINING ORGANIC ACID HAVING CARBON NUMBER OF 2 TO 7 AND IMPURITIES
    Publication number: 20190055185
    Abstract: A treatment method of at least partially removing impurities from a composition containing a fluorine-containing organic acid having the carbon number of 2 to 7 and impurities, the method including a flocculant mixing step of mixing the composition and a flocculant; and a separating step of separating a mixed phase obtained at the mixing step into a solid phase and a liquid phase.
    Type: Application
    Filed: October 13, 2016
    Publication date: February 21, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mihoko OHASHI, Shuji ITATANI, Atsuko TAI
  • Process for preparing fluorocarboxylic acid
    Patent number: 8624060
    Abstract: A process for preparing a fluorocarboxylic acid, which includes a dehydration step of removing from a mixture containing a fluorocarboxylic acid and water at least a part of the water to obtain a dehydrated fluorocarboxylic acid solution, and a purification step of purifying the dehydrated fluorocarboxylic acid solution.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: January 7, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Shuji Itatani, Takuya Ichida, Noriaki Shibata, Kaori Ohno
  • PROCESS FOR PREPARING FLUOROCARBOXYLIC ACID
    Publication number: 20110124915
    Abstract: A process for preparing a fluorocarboxylic acid, which includes a dehydration step of removing from a mixture containing a fluorocarboxylic acid and water at least a part of the water to obtain a dehydrated fluorocarboxylic acid solution, and a purification step of purifying the dehydrated fluorocarboxylic acid solution.
    Type: Application
    Filed: September 4, 2009
    Publication date: May 26, 2011
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shuji Itatani, Takuya Ichida, Noriaki Shibata, Kaori Ohno
  • Process for preparing fluorocarboxylic acids
    Patent number: 7126016
    Abstract: A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid so as to form a sulfate-containing fluorocarboxylic acid phase; and subjecting the fluorocarboxylic acid phase to washing treatment using an aqueous sulfuric acid solution.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: October 24, 2006
    Assignees: E.I. DuPont De Nemours and Company, Daikin Industries, Ltd.
    Inventors: Ta-Wei Fu, Steven H. Swearingen, Takuya Ichida, Shuji Itatani
  • Process for preparing fluorocarboxylic acids
    Publication number: 20050171381
    Abstract: A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid so as to form a sulfate-containing fluorocarboxylic acid phase; and subjecting the fluorocarboxylic acid phase to washing treatment using an aqueous sulfuric acid solution.
    Type: Application
    Filed: March 24, 2005
    Publication date: August 4, 2005
    Inventors: Ta-Wei Fu, Steven Swearingen, Takuya Ichida, Shuji Itatani