Patents by Inventor Yuseki Suyama

Yuseki Suyama 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: 6960691
    Abstract: The invention intends to provide means for producing halogenated aromatic methylamine useful as an intermediate in the production of agrochemical or medical preparations, by an industrially advantageous method. The process according to the present invention for producing halogenated aromatic methylamine is characterized by comprising hydrogen-reducing a halogenated aromatic nitrile represented by formula (1): (wherein X represents a chlorine atom or a fluorine atom, m represents an integer of 1 to 5, n represents an integer of 1 to 5, m+n?6, and when n is 2 or more, each X may be the same or different) using a hydrogenating catalyst in the presence of an organic acid in a solvent to produce a halogenated aromatic methylamine represented by formula (2): (wherein X, m and n have the same meanings as defined above, and a represents an integer of 1 to m).
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: November 1, 2005
    Assignee: Showa Denko K.K.
    Inventors: Hideyuki Kondo, Yuseki Suyama, Kohei Morikawa
  • Patent number: 6909023
    Abstract: To provide a novel method for producing a fluorinated benzenedimethanol compound useful as a starting material or an intermediate in the production of agricultural or medicinal chemicals in an industrially advantageous manner. A method for producing a fluorinated benzenedimethanol compound according to the present invention comprises the steps of reducing the nitrile groups of a fluorinated benzenedinitrile compound to obtain a fluorinated xylylenediamine compound and then converting the aminomethyl groups of the fluorinated xylylenediamine compound into hydroxymethyl groups.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: June 21, 2005
    Assignee: Showa Denko K.K.
    Inventors: Masatoshi Murakami, Yuseki Suyama, Kohei Morikawa
  • Patent number: 6828467
    Abstract: An object of the present invention is to provide a process for producing a fluorinated methyl-benzyl alcohol, which process is industrially applicable. A process for producing a fluorinated methyl-benzyl alcohol according to the present invention includes hydrogenolysis of one hydroxyl group in fluorinated benzene dimethanol. The hydrogenolysis can be carried out in a solvent in the presence of a catalyst. The catalyst can include at least one metal selected from cobalt, iron, copper, nickel, platinum, palladium, and rhenium, and the hydrogenolysis can be carried out using hydrogen.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: December 7, 2004
    Assignee: Showa Denko K.K.
    Inventors: Motoo Miura, Yuseki Suyama, Kohei Morikawa
  • Publication number: 20040010167
    Abstract: An object of the present invention is to provide a process for producing a fluorinated methyl-benzyl alcohol, which process is industrially practicable.
    Type: Application
    Filed: March 11, 2003
    Publication date: January 15, 2004
    Inventors: Motoo Miura, Yuseki Suyama, Kohei Morikawa
  • Publication number: 20030171626
    Abstract: To provide a novel method for producing a fluorinated benzenedimethanol compound useful as a starting material or an intermediate in the production of agricultural or medicinal chemicals in an industrially advantageous manner.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 11, 2003
    Inventors: Masatoshi Murakami, Yuseki Suyama, Kohei Morikawa
  • Publication number: 20030158444
    Abstract: The invention intends to provide means for producing halogenated aromatic methylamine useful as an intermediate in the production of agrochemical or medical preparations, by an industrially advantageous method.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 21, 2003
    Inventors: Hideyuki Kondo, Yuseki Suyama, Kohei Morikawa
  • Patent number: 6245920
    Abstract: Noble metal, particularly ruthenium, Raney catalysts which can hydrogenate (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: June 12, 2001
    Assignee: Showa Denko K.K.
    Inventors: Kouhei Morikawa, Shuuji Hirayama, Yoshimasa Ishimura, Yuseki Suyama, Tsutomu Nozawa, Hiroyuki Monzen, Motoo Miura, Kuniomi Marumo, Taketoshi Naito
  • Patent number: 6215030
    Abstract: Noble metal, particularly ruthenium, Raney catalysts which can hydrogenate (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: April 10, 2001
    Assignee: Showa Denko K.K.
    Inventors: Kouhei Morikawa, Shuuji Hirayama, Yoshimasa Ishimura, Yuseki Suyama, Tsutomu Nozawa, Hiroyuki Monzen, Motoo Miura, Kuniomi Marumo, Taketoshi Naito
  • Patent number: 6114277
    Abstract: The object of the invention is to provide a process for preparing a cyano group-containing methylamine, comprising hydrogenating only one of the two nitrile groups of a aromatic dinitrile, wherein the aromatic dinitrile is reacted a a high conversion ratio using a small amount of a catalyst under the conditions of a low temperature and a low pressure to prepare a cyano group-containing aromatic methylamine in a high yield.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: September 5, 2000
    Assignee: Showa Denko K.K.
    Inventors: Motoo Miura, Yuseki Suyama, Hideyuki Kondo, Kouhei Morikawa
  • Patent number: 6018048
    Abstract: Noble metal, particularly ruthenium, Raney catalysts having the property of catalyzing the hydrogenation of (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: January 25, 2000
    Assignee: Showa Denko K.K.
    Inventors: Kouhei Morikawa, Shuuji Hirayama, Yoshimasa Ishimura, Yuseki Suyama, Tsutomu Nozawa, Hiroyuki Monzen, Motoo Miura, Kuniomi Marumo, Taketoshi Naito
  • Patent number: 4942261
    Abstract: An allyl type amine is prepared by reacting an allyl type alcohol represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently stand for a hydrogen atom, an aliphatic hydrocarbon group or alicyclic hydrocarbon having 1 to 8 carbon atoms, or an aromatic hydrocarbon group,with at least one member selected from the group consisting of ammonia, a primary amine and a secondary amine in the presence of a palladium compound and a multidentate phosphorus compound.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: July 17, 1990
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Yoshimasa Ishimura, Takami Oe, Yuseki Suyama, Nobuyuki Nagato