Patents by Inventor Hiroshi Hachiya

Hiroshi Hachiya 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: 9633770
    Abstract: An epsilon-type iron oxide having an Fe-site that is substituted with a platinum group element, provided that Fe of a D-site of the epsilon-type iron oxide is not substituted with the platinum group element.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: April 25, 2017
    Assignees: THE UNIVERSITY OF TOKYO, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shin-ichi Ohkoshi, Shunsuke Sakurai, Asuka Namai, Sayaka Umeda, Hiroshi Hachiya, Kazuyuki Matsumoto, Takashi Gotoh
  • Publication number: 20160343484
    Abstract: An epsilon-type iron oxide having an Fe-site that is substituted with a platinum group element, provided that Fe of a D-site of the epsilon-type iron oxide is not substituted with the platinum group element.
    Type: Application
    Filed: August 8, 2016
    Publication date: November 24, 2016
    Inventors: Shin-ichi OHKOSHI, Shunsuke SAKURAI, Asuka NAMAI, Sayaka UMEDA, Hiroshi HACHIYA, Kazuyuki MATSUMOTO, Takashi GOTOH
  • Patent number: 9458026
    Abstract: To provide a method for improving a coercive force of epsilon-type iron oxide particles, and an epsilon-type iron oxide. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 4, 2016
    Assignees: THE UNIVERSITY OF TOKYO, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shin-ichi Ohkoshi, Shunsuke Sakurai, Asuka Namai, Sayaka Umeda, Hiroshi Hachiya, Kazuyuki Matsumoto, Takashi Gotoh
  • Patent number: 9321884
    Abstract: A method for producing a condensation polymerization reaction polymer, comprising a guide polymerization step in which a molten prepolymer is supplied to the top edge of a wire guide to obtain the condensation polymerization reaction polymer, the wire guide comprising a vertical wire group consisting of a plurality of vertical wires extending in the vertical direction, which are mutually spaced in alignment at an arrangement pitch L1 (mm). In the guide polymerization step, the molten prepolymer aggregates so that a molten prepolymer mass is formed on the vertical wire, and a molten prepolymer mass is formed wherein, the width of the molten prepolymer mass measured in an alignment direction of the vertical wires at a position 200 mm below the top edge being represented as L2 (mm), the width L2 of at least a portion of the molten prepolymer mass satisfies the inequality (1).
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: April 26, 2016
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Hiroshi Hachiya, Yoko Hachiya, Muneaki Aminaka, Kazuharu Yasuda
  • Publication number: 20120263642
    Abstract: To provide a method for improving a coercive force of epsilon-type iron oxide particles, and an epsilon-type iron oxide. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.
    Type: Application
    Filed: September 30, 2010
    Publication date: October 18, 2012
    Applicants: DOWA ELECTRONICS MATERIALS CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Shin-ichi Ohkoshi, Shunsuke Sakurai, Asuka Namai, Sayaka Umeda, Hiroshi Hachiya, Kazuyuki Matsumoto, Takashi Gotoh
  • Patent number: 8093437
    Abstract: The invention provides an apparatus and process for producing a diol by taking a cyclic carbonate and an aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into column A, carrying out reactive distillation in column A, continuously withdrawing a low boiling point reaction mixture containing a produced dialkyl carbonate and the aliphatic monohydric alcohol from an upper portion of column A, continuously withdrawing a high boiling point reaction mixture containing a produced diol from a lower portion of column A, continuously feeding the high boiling point reaction mixture into distillation column C, distilling off material having a lower boiling point than that of the diol contained in the high boiling point reaction mixture as a column top component and a side cut component so as to obtain a column bottom component, continuously feeding the column bottom component into column C, and obtaining the diol.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: January 10, 2012
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 8071819
    Abstract: The invention provides an apparatus and process for producing high-purity diol by taking cyclic carbonate and aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into column A, carrying out reactive distillation in column A, continuously withdrawing a low boiling point reaction mixture containing a produced dialkyl carbonate and the aliphatic monohydric alcohol from an upper portion of column A, continuously withdrawing a high boiling point reaction mixture containing a produced diol from a lower portion of column A, continuously feeding the high boiling point reaction mixture into distillation column C, distilling off material having a lower boiling point than that of the diol contained in the high boiling point reaction mixture AB as a column top component and/or a side cut component so as to obtain a column bottom component, continuously feeding the column bottom component into distillation column E, and obtaining the diol.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: December 6, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 8058465
    Abstract: A process for industrially producing dialkyl carbonate and a diol continuously through a reactive distillation system is disclosed. The process includes the steps of taking a cyclic carbonate and an aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into a continuous multi-stage distillation column in which a catalyst is present, carrying out reaction and distillation simultaneously in the column, continuously withdrawing a low boiling point reaction mixture containing the produced dialkyl carbonate from an upper portion of the column in a gaseous form, and continuously withdrawing a high boiling point reaction mixture containing the diol from a lower portion of the column in a liquid form. According to the present invention, there is provided a specific continuous multi-stage distillation column having a specified structure, and a production process using this continuous multi-stage distillation column.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: November 15, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 8049028
    Abstract: It is an object of the present invention to provide a specific apparatus and process for using a single distillation column on a low boiling point reaction mixture containing a large amount of a dialkyl carbonate and an aliphatic monohydric alcohol produced through a reactive distillation process of taking a cyclic carbonate and the aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into a continuous multi-stage distillation column in which a homogeneous catalyst is present, and carrying out reaction and distillation simultaneously in the column, so as to separate the low boiling point reaction mixture by distillation into a column top component BT having the aliphatic monohydric alcohol as a main component thereof and a column bottom component BB having the dialkyl carbonate as a main component thereof stably for a prolonged period of time industrially.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 1, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 8044226
    Abstract: A high-purity diphenyl carbonate, wherein the diphenyl carbonate is unsubstituted or substituted with a lower hydrocarbon, and has a halogen content of not more than 0.1 ppm, a content of an intermediate boiling point material of not more than 100 ppm, and a content of by-products having a higher boiling point than that of said diphenyl carbonate of not more than 100 ppm. A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate having low contents of intermediate boiling point and high boiling point impurities is produced is disclosed. As a starting material, a reaction mixture containing an alkyl aryl carbonate obtained through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound is used. The process in which separation by distillation is carried out uses three distillation columns in a specified order.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: October 25, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 8044167
    Abstract: An aromatic polycarbonate that is obtained by transesterification between a high-purity diphenyl carbonate and an aromatic dihydroxy compound. A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate having low contents of intermediate boiling point and high boiling point impurities is produced is disclosed. As a starting material, a reaction mixture containing an alkyl aryl carbonate obtained through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound is used. The process in which separation by distillation is carried out uses three distillation columns in a specified order. Moreover, it is particularly preferable if a reactive distillation column and the three distillation columns, each of which has a specified structure, and the three distillation columns are each operated under specified distillation conditions.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: October 25, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 7884251
    Abstract: It is an object of the present invention to provide a specific industrial separation process that enables an alcohol to be separated out efficiently and stably for a prolonged period of time from a large amount of a low boiling point reaction mixture containing a by-produced alcohol when mass-producing aromatic carbonates on an industrial scale by subjecting a dialkyl carbonate and an aromatic monohydroxy compound to transesterification reaction in a reactive distillation column in which a catalyst is present. Although there have been various proposals regarding processes for the production of aromatic carbonates by means of a reactive distillation method, these have all been on a small scale and short operating time laboratory level, and there have been no disclosures whatsoever on a specific process or apparatus enabling mass production on an industrial scale to be carried out stably for a prolonged period of time.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: February 8, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 7812189
    Abstract: According to the present invention, there are provided a high boiling point material separating column A and a diphenyl carbonate purifying column B each comprising a continuous multi-stage distillation column having specified structures, and there is provided a specific process that enables a high-purity diphenyl carbonate which is important as a raw material of a high-quality and high-performance polycarbonate to be produced stably for a prolonged period of time on an industrial scale of not less than 1 ton/hr from a reaction mixture containing the diphenyl carbonate using an apparatus in which these two continuous multi-stage distillation columns are connected together.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: October 12, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hiroshi Hachiya, Kazuhiko Matsuzaki, Hironori Miyaji
  • Patent number: 7799939
    Abstract: It is an object of the present invention to provide, for a case of producing a dialkyl carbonate and a diol from a cyclic carbonate and an aliphatic monohydric alcohol, a process that simultaneously satisfies the cyclic carbonate conversion being high, the selectivities for the dialkyl carbonate and diol to be produced being high, and a high-purity diol having a high UV transmittance and a low aldehyde content being obtained without carrying out complicated treatment such as feeding water into a diol distillation purification step.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: September 21, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Hironori Miyaji, Shinsuke Fukuoka, Hiroshi Hachiya
  • Patent number: 7777067
    Abstract: It is an object of the present invention to provide, for the case of continuously producing aromatic carbonates containing a diaryl carbonate as a main product by taking an alkyl aryl carbonate as a starting material, which is obtainable through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound, using a continuous multi-stage distillation column in which a catalyst is present, and continuously feeding the starting material into the continuous multi-stage distillation column, a specific process that enables the diaryl carbonate to be produced with high selectivity and high productivity stably for a prolonged period of time on an industrial scale of not less than 1 ton per hour.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: August 17, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 7658817
    Abstract: An industrial evaporation apparatus having a specified structure in which there are guides that do not themselves have a heat source, a flow path controlling member having a function of making the liquid fed onto a perforated plate from a liquid receiving port flow mainly from a peripheral portion toward a central portion of the perforated plate is provided in a liquid feeding zone, and formula (1) to (5), or formula (1) to (10), or formula (1) to (12), are satisfied.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: February 9, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 7652123
    Abstract: A method for producing a high quality aromatic polycarbonate, which comprises subjecting to molten state polymerization a mixture of an aromatic dihydroxy compound and a diaryl carbonate in the presence of a catalyst, the mixture of the aromatic dihydroxy compound and the diaryl carbonate being obtained by a mixing step in which an aromatic dihydroxy compound and a catalyst, each being in a solid state and/or a liquid state, are added to a diaryl carbonate in a molten state in the presence of an inert gas, thereby dissolving the aromatic dihydroxy compound and the catalyst in the molten diaryl carbonate.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: January 26, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Koshiro Yokota, Hiroshi Hachiya
  • Publication number: 20090326257
    Abstract: It is an object of the present invention to provide a specific process that enables dialkyl carbonates and diols to be produced on an industrial scale of not less than 2 ton/hr and not less than 1.3 ton/hr respectively with high selectivity and high productivity stably for a prolonged period of time through a reactive distillation system of taking cyclic carbonates and aliphatic monohydric alcohols as starting materials, continuously feeding the starting materials into a continuous multi-stage distillation column in which a catalyst is present, and carrying out reaction and distillation simultaneously in the column. Although there have been many proposals regarding processes for the production of the dialkyl carbonates and the diols through a reactive distillation method, these have all been on a small scale and short operating time laboratory level, and there have been no disclosures whatsoever on a specific process or apparatus enabling mass production on an industrial scale.
    Type: Application
    Filed: November 30, 2006
    Publication date: December 31, 2009
    Inventors: Shinsuke Fukuoka, Hironori MIyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Patent number: 7622601
    Abstract: A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate having low contents of intermediate boiling point and high boiling point impurities is produced is disclosed. As a starting material, a reaction mixture containing an alkyl aryl carbonate obtained through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound is used. The process in which separation by distillation is carried out uses three distillation columns in a specified order. Moreover, it is particularly preferable if a reactive distillation column and the three distillation columns, each of which has a specified structure, and the three distillation columns are each operated under specified distillation conditions.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: November 24, 2009
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Shinsuke Fukuoka, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki
  • Publication number: 20090287014
    Abstract: An aromatic polycarbonate that is obtained by transesterification between a high-purity diphenyl carbonate and an aromatic dihydroxy compound. A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate having low contents of intermediate boiling point and high boiling point impurities is produced is disclosed. As a starting material, a reaction mixture containing an alkyl aryl carbonate obtained through a transesterification reaction between a dialkyl carbonate and an aromatic monohydroxy compound is used. The process in which separation by distillation is carried out uses three distillation columns in a specified order. Moreover, it is particularly preferable if a reactive distillation column and the three distillation columns, each of which has a specified structure, and the three distillation columns are each operated under specified distillation conditions.
    Type: Application
    Filed: July 23, 2009
    Publication date: November 19, 2009
    Inventors: Shinsuke FUKUOKA, Hironori Miyaji, Hiroshi Hachiya, Kazuhiko Matsuzaki