Patents by Inventor Masato Inary

Masato Inary 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: 9144750
    Abstract: A method of replacing a first dispersion medium, in a starting slurry composed of the first dispersion medium and either terephthalic acid crystals or isophthalic acid crystals, with a second dispersion medium, and apparatus therefore. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion, and moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: September 29, 2015
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, LTD.
    Inventors: Masato Inari, Fumiya Zaima
  • Publication number: 20120328483
    Abstract: A method of replacing a first dispersion medium, in a starting slurry composed of the first dispersion medium and either terephthalic acid crystals or isophthalic acid crystals, with a second dispersion medium, and apparatus therefore. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion, and moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank.
    Type: Application
    Filed: August 16, 2012
    Publication date: December 27, 2012
    Inventors: Masato Inari, Fumiya Zaima
  • Patent number: 8247604
    Abstract: A method of replacing a first dispersion medium in a starting slurry composed of the first dispersion medium and a terephthalic acid crystal with a second dispersion medium. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion. The fed starting slurry moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: August 21, 2012
    Assignees: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.
    Inventors: Masato Inari, Fumiya Zaima
  • Patent number: 8247605
    Abstract: A method of replacing a first dispersion medium in a starting slurry composed of the first dispersion medium and isophthalic acid crystals with a second dispersion medium. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion. The fed starting slurry moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank. The replaced slurry composed of isophthalic acid crystals and the second dispersion medium is mainly discharged from the lower portion of the replacement tank, and the first dispersion medium is mainly withdrawn from the upper portion of the replacement tank.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: August 21, 2012
    Assignees: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.
    Inventors: Masato Inari, Fumiya Zaima
  • Patent number: 8242304
    Abstract: A method for producing isophthalic acid, comprising: subjecting a m-phenylene compound and a molecular-oxygen-containing gas to liquid-phase oxidation reaction in the presence of a catalyst comprising a heavy metal compound and a bromine compound, and hydrous acetic acid having a water content of 1 to 15 mass %, to thereby yield a slurry; regulating the temperature of the slurry to 35 to 140° C., to thereby precipitate isophthalic acid; removing the isophthalic acid through solid-liquid separation, to thereby recover a mother liquor; and recovering the catalyst from the mother liquor by following steps (1) to (4) as described.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: August 14, 2012
    Assignees: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.
    Inventors: Fumiya Zaima, Nobuo Namiki, Hideaki Fujita, Masato Inari
  • Patent number: 8236982
    Abstract: A method for producing terephthalic acid comprising: subjecting a p-phenylene compound to a liquid-phase oxidation reaction by the use of a molecular-oxygen-containing gas in the presence of a catalyst at least containing a heavy metal compound and a bromine compound, and hydrous acetic acid having a water content of 1 to 15 mass %, to thereby yield a slurry; regulating the temperature of the slurry to 35 to 140° C., to thereby cause terephthalic acid to precipitate; removing the terephthalic acid through solid-liquid separation, to thereby recover a mother liquor; and recovering the catalyst from the mother liquor through a series of operations (1) to (4), as described, for reusing at least a portion of the catalyst in the liquid-phase oxidation reaction.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: August 7, 2012
    Assignees: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.
    Inventors: Fumiya Zaima, Masato Inari, Hideaki Fujita, Nobuo Namiki
  • Publication number: 20110213181
    Abstract: A method for producing terephthalic acid comprising: subjecting a p-phenylene compound to a liquid-phase oxidation reaction by the use of a molecular-oxygen-containing gas in the presence of a catalyst at least containing a heavy metal compound and a bromine compound, and hydrous acetic acid having a water content of 1 to 15 mass %, to thereby yield a slurry; regulating the temperature of the slurry to 35 to 140° C., to thereby cause terephthalic acid to precipitate; removing the terephthalic acid through solid-liquid separation, to thereby recover a mother liquor; and recovering the catalyst from the mother liquor through a series of operations (1) to (4), as described, for reusing at least a portion of the catalyst in the liquid-phase oxidation reaction.
    Type: Application
    Filed: March 15, 2011
    Publication date: September 1, 2011
    Applicants: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., LTD., MIZUSHIMA AROMA COMPANY, LTD.
    Inventors: Fumiya ZAIMA, Masato Inari, Hideaki Fujita, Nobuo Namiki
  • Publication number: 20110213180
    Abstract: A method for producing isophthalic acid, comprising: subjecting a m-phenylene compound and a molecular-oxygen-containing gas to liquid-phase oxidation reaction in the presence of a catalyst comprising a heavy metal compound and a bromine compound, and hydrous acetic acid having a water content of 1 to 15 mass %, to thereby yield a slurry; regulating the temperature of the slurry to 35 to 140° C., to thereby precipitate isophthalic acid; removing the isophthalic acid through solid-liquid separation, to thereby recover a mother liquor; and recovering the catalyst from the mother liquor by following steps (1) to (4) as described.
    Type: Application
    Filed: March 15, 2011
    Publication date: September 1, 2011
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Fumiya ZAIMA, Nobuo Namiki, Hideaki Fujita, Masato Inari
  • Publication number: 20100016629
    Abstract: The invention provides a method for producing terephthalic acid, characterized by including subjecting a p-phenylene compound to liquid-phase oxidation reaction by use of a molecular-oxygen-containing gas in the presence of a catalyst at least containing a heavy metal compound and a bromine compound, and hydrous acetic acid having a water content of 1 to 15 mass %, to thereby yield a slurry; regulating the temperature of the slurry to 35 to 140° C., to thereby cause terephthalic acid to precipitate; removing the terephthalic acid through solid-liquid separation, to thereby recover a mother liquor; and recovering the catalyst from the mother liquor through a series of the following steps (1) to (4) for reusing at least a portion of the catalyst in the liquid-phase oxidation reaction: (1) an adsorption step including regulating the ratio “amount by mole of bromide ions in the mother liquor/total amount by mole of heavy metal ions in the mother liquor” to 0.
    Type: Application
    Filed: December 7, 2007
    Publication date: January 21, 2010
    Applicants: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.
    Inventors: Fumiya Zaima, Masato Inari, Hideaki Fujita, Nobuo Namiki
  • Publication number: 20100012887
    Abstract: A method of replacing a first dispersion medium in a starting slurry composed of the first dispersion medium and a terephthalic acid crystal with a second dispersion medium. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion. The fed starting slurry moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank.
    Type: Application
    Filed: June 8, 2007
    Publication date: January 21, 2010
    Inventors: Masato Inari, Fumiya Zaima
  • Publication number: 20100004484
    Abstract: A method of replacing a first dispersion medium in a starting slurry composed of the first dispersion medium and isophthalic acid crystals with a second dispersion medium. The starting slurry is tangentially fed to a vertically extending cylindrical portion of a cyclone-shaped nozzle disposed at an upper portion of a replacement tank of a dispersion medium replacement apparatus, from a tangential direction of the cylindrical portion. The fed starting slurry moves circularly along an inner wall of the cylindrical portion. The slurry circularly moving is then discharged from an opening which is disposed at a vertically lower end of the cylindrical portion and dispersed in a second dispersion medium which is fed from a lower portion of the replacement tank. The replaced slurry composed of isophthalic acid crystals and the second dispersion medium is mainly discharged from the lower portion of the replacement tank, and the first dispersion medium is mainly withdrawn from the upper portion of the replacement tank.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 7, 2010
    Inventors: Masato Inari, Fumiya Zaima
  • Patent number: 7569707
    Abstract: A method of producing pyromellitic dianhydride. The method includes a step of heating a crude pyromellitic acid in the absence of acetic anhydride to convert a part of pyromellitic acid to pyromellitic anhydride, and a subsequent step of heating the resultant mixture in the presence of acetic anhydride to complete the anhydrization of pyromellitic acid. The pyromellitic dianhydride by the method contains little pyromellitic monoanhydride and other monoanhydrides derived from impurities and is less discolored. The pyromellitic dianhydride has particle properties not causing plugging, etc. during its transportation, storage and use.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: August 4, 2009
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hiroshi Ogawa, Atsushi Okoshi, Masashi Yabuno, Masato Inari
  • Patent number: 7547803
    Abstract: A process for producing a high purity aromatic polycarboxylic acid (APA) by purification of a crude APA comprises: (I) aging a slurry of the crude APA in a first dispersion medium at 180 to 300° C. for 10 minutes or longer under stirring; (II) introducing the aged slurry of the APA into a column for substituting dispersion media, bringing the slurry into contact with a second dispersion medium and separating the resultant fluid into a fluid of the first dispersion medium containing impurities and a slurry of the second dispersion medium containing crystals of the high purity APA; and (III) separating the crystals of the high purity APA from the slurry of the second dispersion medium. A high purity APA having excellent hue and particle diameter can be industrially advantageously produced while the construction of the process is simplified and the consumption of energy is decreased.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: June 16, 2009
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shinichi Nagao, Masato Inari, Jitsuo Oishi, Kenji Nakaya, Hiroshi Machida
  • Publication number: 20070021622
    Abstract: A method of producing pyromellitic dianhydride. The method includes a step of heating a crude pyromellitic acid in the absence of acetic anhydride to convert a part of pyromellitic acid to pyromellitic anhydride, and a subsequent step of heating the resultant mixture in the presence of acetic anhydride to complete the anhydrization of pyromellitic acid. The pyromellitic dianhydride by the method contains little pyromellitic monoanhydride and other monoanhydrides derived from impurities and is less discolored. The pyromellitic dianhydride has particle properties not causing plugging, etc. during its transportation, storage and use.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 25, 2007
    Inventors: Hiroshi Ogawa, Atsushi Okoshi, Masashi Yabuno, Masato Inari
  • Patent number: 7071362
    Abstract: In the production of an alicyclic aldehyde, a starting aromatic aldehyde is converted into an aromatic acetal for protecting the formyl group. The aromatic ring of the aromatic acetal is then hydrogenated to convert the aromatic acetal into an alicyclic acetal, which is then hydrolyzed to cleave the acetal protecting group to obtain the aimed alicyclic aldehyde.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: July 4, 2006
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tomohiro Sugawara, Fumiya Zaima, Atsushi Okoshi, Kinji Kato, Masato Inari
  • Publication number: 20060058551
    Abstract: Crude polycarboxylic acid is slurried in an aqueous medium and the slurry is brought into contact with a metal catalyst while preventing catalyst components thereof from contaminating crystals. Since hydrogenation or decarbonylation of a polymerization inhibitory substance or a substance causing coloration can efficiently proceed at a low temperature while suppressing side reactions, a product having such a quality as to permit direct use thereof as such for polymerization can be obtained with good productivity. Also, since the contact temperature can be lowered, simplification of apparatus and energy saving may be attained.
    Type: Application
    Filed: November 1, 2005
    Publication date: March 16, 2006
    Inventors: Makoto Komatsu, Masato Inari
  • Patent number: 7005540
    Abstract: Crude polycarboxylic acid is slurried in an aqueous medium and the slurry is brought into contact with a metal catalyst while preventing catalyst components thereof from contaminating crystals. Since hydrogenation or decarbonylation of a polymerization inhibitory substance or a substance causing coloration can efficiently proceed at a low temperature while suppressing side reactions, a product having such a quality as to permit direct use thereof as such for polymerization can be obtained with good productivity. Also, since the contact temperature can be lowered, simplification of apparatus and energy saving may be attained.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: February 28, 2006
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Makoto Komatsu, Masato Inari
  • Publication number: 20050054879
    Abstract: In the production of an alicyclic aldehyde, a starting aromatic aldehyde is converted into an aromatic acetal for protecting the formyl group. The aromatic ring of the aromatic acetal is then hydrogenated to convert the aromatic acetal into an alicyclic acetal, which is then hydrolyzed to cleave the acetal protecting group to obtain the aimed alicyclic aldehyde.
    Type: Application
    Filed: August 25, 2004
    Publication date: March 10, 2005
    Inventors: Tomohiro Sugawara, Fumiya Zaima, Atsushi Okoshi, Kinji Kato, Masato Inari
  • Publication number: 20040260052
    Abstract: A process for producing a high purity aromatic polycarboxylic acid (APA) by purification of a crude APA comprises: (I) aging a slurry of the crude APA in a first dispersion medium at 180 to 300° C. for 10 minutes or longer under stirring; (II) introducing the aged slurry of the APA into a column for substituting dispersion media, bringing the slurry into contact with a second dispersion medium and separating the resultant fluid into a fluid of the first dispersion medium containing impurities and a slurry of the second dispersion medium containing crystals of the high purity APA; and (III) separating the crystals of the high purity APA from the slurry of the second dispersion medium. A high purity APA having excellent hue and particle diameter can be industrially advantageously produced while the construction of the process is simplified and the consumption of energy is decreased.
    Type: Application
    Filed: June 7, 2004
    Publication date: December 23, 2004
    Inventors: Shinichi Nagao, Masato Inari, Jitsuo Oishi, Kenji Nakaya, Hiroshi Machida
  • Publication number: 20040133038
    Abstract: Crude polycarboxylic acid is slurried in an aqueous medium and the slurry is brought into contact with a metal catalyst while preventing catalyst components thereof from contaminating crystals. Since hydrogenation or decarbonylation of a polymerization inhibitory substance or a substance causing coloration can efficiently proceed at a low temperature while suppressing side reactions, a product having such a quality as to permit direct use thereof as such for polymerization can be obtained with good productivity. Also, since the contact temperature can be lowered, simplification of apparatus and energy saving may be attained.
    Type: Application
    Filed: October 27, 2003
    Publication date: July 8, 2004
    Inventors: Makoto Komatsu, Masato Inari