Patents by Inventor Kazutoshi Uozumi

Kazutoshi Uozumi 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).

  • Crossflow type filtering operation method using ceramic filter
    Patent number: 9150487
    Abstract: Provided is a simple filtering operation method capable of conducting a filtering operation without clogging in a ceramic filter for a long period of time, in the operation of filtering fine crystals of terephthalic acid in an oxidation reaction mother liquor obtained in a process of terephthalic acid production by a cross-flow filtration using the ceramic filter. The present invention can be accomplished by conducting an operation for filtering the fine crystals and a back washing operation with a filtrate while maintaining a flowing circulation operation of the oxidation reaction mother liquor under predetermined conditions.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: October 6, 2015
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Fumiya Zaima, Nirou Hoshishima, Kazutoshi Uozumi, Hideaki Fujita
  • CROSSFLOW TYPE FILTERING OPERATION METHOD USING CERAMIC FILTER
    Publication number: 20130281732
    Abstract: Provided is a simple filtering operation method capable of conducting a filtering operation without clogging in a ceramic filter for a long period of time, in the operation of filtering fine crystals of terephthalic acid in an oxidation reaction mother liquor obtained in a process of terephthalic acid production by a cross-flow filtration using the ceramic filter. The present invention can be accomplished by conducting an operation for filtering the fine crystals and a back washing operation with a filtrate while maintaining a flowing circulation operation of the oxidation reaction mother liquor under predetermined conditions.
    Type: Application
    Filed: October 25, 2011
    Publication date: October 24, 2013
    Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MIZUSHIMA AROMA COMPANY, LTD., TOYOBO CO., LTD.
    Inventors: Fumiya Zaima, Nirou Hoshishima, Kazutoshi Uozumi, Hideaki Fujita