Patents by Inventor Naka Tonouchi

Naka Tonouchi 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).

  • Process for the manufacture of trimers of aliphatic aldehyde with chlorinated 2-position
    Patent number: 5416226
    Abstract: A process for manufacturing a trimer of a low aliphatic aldehyde having 2-5 carbon atoms and the chlorinated 2-position is disclosed. The process comprises cyclically trimerizing said aliphatic aldehyde with chlorinated 2-position in the presence of a catalyst selected from the group consisting of metallic tin, metallic zinc, zeolite, and Lewis acids. It ensures easy separation of the catalyst from the target trimer and a high yield of the trimer. In addition, the unreacted raw material can be easily recovered.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: May 16, 1995
    Assignee: Kureha Chemical Industry Co., Ltd.
    Inventors: Takashi Wakasugi, Tadashi Miyakawa, Naka Tonouchi, Fukuichi Suzuki, Takashi Yamauchi
  • 2-chloropropionaldehyde trimer and production process thereof
    Patent number: 5274131
    Abstract: A novel compound, a 2-chloropropionaldehyde trimer and a process of producing a 2-chloropropionaldehyde trimer by adding concentrated sulfuric acid to an organic solvent containing 2-chloropropionaldehyde and stirring the mixture at a temperature of from -5.degree. C. to 15.degree. C. to carry out the reaction.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: December 28, 1993
    Assignee: Kureha Chemical Industry Co., Ltd.
    Inventors: Takashi Wakasugi, Tadashi Miyakawa, Naka Tonouchi, Takashi Yamauchi, Makoto Ishizuka