Patents by Inventor Takao Ikariya

Takao Ikariya 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: 5763688
    Abstract: The present invention provides a method for producing a alcohol including an optically active alcohol by hydrogenating a carbonyl compound in the presence of a homogeneous catalyst, a base and a nitrogen-containing organic compound. Thus, the reaction employs an inexpensive catalyst and proceeds in high yield and high efficiency.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: June 9, 1998
    Assignee: Research Development Corporation of Japan
    Inventors: Takao Ikariya, Takeshi Ohkuma, Hirohito Ooka, Shohei Hashiguchi, Nobuo Seido, Ryoji Noyori
  • Patent number: 5750804
    Abstract: A process whereby trans-3-isocamphylcyclohexanol, which is useful as a perfume ingredient, can be produced on an industrially available scale, at a low cost and at a high stereoselectivity, is disclosed. The process comprises hydrogenating 3-isocamphylcyclohexanone represented by the following formula (I): ##STR1## by using a ruthenium/phosphine complex as a catalyst in the presence of a base containing an alkali metal or an alkaline earth metal and an amine.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: May 12, 1998
    Assignee: Takasago International Corporation
    Inventors: Makoto Emura, Takaaki Toyoda, Nobuo Seido, Makoto Harada, Ryoji Noyori, Takao Ikariya, Takashi Ohkuma
  • Patent number: 5639910
    Abstract: Formic acid or derivatives thereof are produced from non-toxic carbon dioxide in the supercritical state, using it as raw materials, without using solvents, and at a high efficiency owing to a high reaction velocity, by reacting said carbon dioxide and an active hydrogen group-containing compound.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: June 17, 1997
    Assignees: Research Development Corporation of Japan, Takao Ikariya
    Inventors: Takao Ikariya, Philip Gregory Jessop, Ryoji Noyori
  • Patent number: 5306842
    Abstract: A method for manufacturing a purified aromatic urethane. Aromatic urethanes are synthesized from a N,N'-disubstituted urea and an organic hydroxyl compound in a reaction medium. The organic hydroxyl compound and the primary aromatic amine side product which are present in the reaction mixture is distilled off and removed from the reaction mixture leaving a distillation bottom. The N,N'-disubstituted urea is separated and removed from the distillation bottom by solvent extraction of the aromatic urethane, and the aromatic urethane in the extract phase obtained in said solvent extraction is separated and purified.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: April 26, 1994
    Assignee: NKK Corporation
    Inventors: Takao Ikariya, Masanori Itagaki, Masatsugu Mizuguchi, Makoto Miyazawa, Sachiko Yamamoto
  • Patent number: 5130464
    Abstract: A method of manufacturing aromatic urethanes utilizes a urea production process wherein a primary aromatic amine, an aromatic nitro-compound and carbon monoxide are made to react together in the presence of a catalyst and solvents, to produce N,N'-disubstituted urea, the solvlent used in the urea production process consisting at least partly of an amide or oxygen-containing sulfur compound, and having the functions of stabilizing the catalyst and preventing it from separating out in a solution, and of increasing the activity of the catalyst, the quantity of the solvent being sufficient to permit it to fulfill these functions effectively. The method additionally includes an aromatic urethane production process wherein the N,N'-disubstituted urea produced is made to react with an organic compound containing hydroxyl groups, to produce a primary aromatic amine and aromatic urethane, the primary aromatic amine being separated to obtain the aromatic urethane.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: July 14, 1992
    Assignee: NKK Corporation
    Inventors: Takao Ikariya, Masanori Itagaki, Mikoto Iemoto, Masatsugu Mizuguchi, Tetsuo Hachiya, Tomomichi Nakamura, Makoto Miyazawa, Sachiko Yamamoto
  • Patent number: 5055282
    Abstract: For carrying out a process for decomposing, into hydrogen and nitrogen, ammonia recovered from a coke oven gas by combining a catalytic combustion of ammonia and a catalytic decomposition of ammonia utilizing a waste heat by said combustion, a basic compound as a required catalyzer is added to ruthenium supported on alumina, or ruthenium as a required catalyzer is supported on a basic compound, whereby ammonia may be decomposed effectively at ranges of low temperatures as not more than 500.degree. C.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: October 8, 1991
    Assignee: NKK Corporation
    Inventors: Tsutomu Shikada, Minoru Asanuma, Takao Ikariya
  • Patent number: 5002921
    Abstract: For carrying out a process for decomposing, into hydrogen and nitrogen, ammonia recovered from a coke oven gas by combining a catalytic combustion of ammonia and a catalytic decomposition of ammonia utilizing a waste heat by said combustion, a basic compound as a required catalyzer is added to ruthenium supported on alumina, or ruthenium as a required catalyzer is supported on a basic compound, whereby ammonia may be decomposed effectively at ranges of low temperatures as not more than 500.degree. C.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: March 26, 1991
    Assignee: NKK Corporation
    Inventors: Tsutoma Shikada, Asanuma Minoru, Takao Ikariya
  • Patent number: 4699994
    Abstract: According to a method of manufacturing a diphenylmethane dicarbamic acid ester by reacting an N-phenyl carbamic acid diester with a methylating agent in an aqueous acid solution, the aqueous acid solution is an aqueous inorganic acid solution, and the concentration of the N-phenyl carbamic acid ester in the aqueous acid solution is not more than the solubility thereof at the reaction temperature.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: October 13, 1987
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Takao Ikariya, Masanori Itagaki, Masatsugu Mizuguchi, Itaru Sakai, Osamu Tajima
  • Patent number: 4691037
    Abstract: A ruthenium-phosphine complex represented by the formula (I)Ru.sub.x H.sub.y Cl.sub.z (R--BINAP).sub.2 (S).sub.p (I)wherein R--BINAP represents tertiary phosphine represented by the formula (II) ##STR1## R which is the same represents hydrogen, methyl or t-butyl, S represents tertiary amine, y represents 0 or 1, and when y is 0, x represents 2, z represents 4 and p represents 1, and when y is 1, x represents 1, z represents 1 and p represents 0.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: September 1, 1987
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Sadao Yoshikawa, Masahiko Saburi, Takao Ikariya, Youichi Ishii, Susumu Akutagawa
  • Patent number: 4678856
    Abstract: The present invention relates to a method of manufacturing aromatic urethane, an aromatic mononitro-compound, an aromatic primary amine, and carbon monoxide being reacted using a catalyst containing a platinum group metal-containing compound as a major constituent to prepare N,N'-di-substituted urea. The resultant N,N'-di-substituted urea is reacted with a hydroxyl group-containing organic compound to prepare an aromatic primary amine and aromatic urethane, and the aromatic primary amine is separated to obtain aromatic urethane.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: July 7, 1987
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Takao Ikariya, Masanori Itagaki, Masatsugu Mizuguchi, Itaru Sakai, Osamu Tajima
  • Patent number: RE34137
    Abstract: The present invention relates to a method of manufacturing aromatic urethane, an aromatic mononitro-compound, an aromatic primary amine, and carbon monoxide being reacted using a catalyst containing a platinum group metal-containing compound as a major constituent to prepare N,N'-di-substituted urea. The resultant N,N'-di-substituted urea is reacted with a hydroxyl group-containing organic compound to prepare an aromatic primary amine and aromatic urethane, and the aromatic primary amine is separated to obtain aromatic urethane.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 1, 1992
    Assignee: NKK Corporation
    Inventors: Takao Ikariya, Masanori Itagaki, Masatsugu Mizuguchi, Itaru Sakai, Osamu Tajima