Patents by Inventor Kazuhiro Imanishi

Kazuhiro Imanishi 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 CONTINUOUS PRODUCTION OF ACETYLENEDIOL
    Publication number: 20030018221
    Abstract: The present invention provides a process for producing an acetylenediol continuously by reacting a ketone with acetylene in the presence of an alkali catalyst, which process comprises continuously feeding, into a first-stage reactor, a reaction solvent, an alkali catalyst, a ketone and acetylene to give rise to a reaction, continuously introducing the reaction mixture into a second-stage reactor, and continuously feeding a fresh portion of the same ketone into the second-stage reactor to give rise to a reaction.
    Type: Application
    Filed: June 12, 2002
    Publication date: January 23, 2003
    Inventors: Hideki Omori, Goro Sawada, Hideo Fukuda, Kazuhiro Imanishi, Tomohiko Sato
  • Process for continuous production of acetylenediol
    Patent number: 6506946
    Abstract: The present invention provides a process for producing an acetylenediol continuously by reacting a ketone with acetylene in the presence of an alkali catalyst, which process comprises continuously feeding, into a first-stage reactor, a reaction solvent, an alkali catalyst, a ketone and acetylene to give rise to a reaction, continuously introducing the reaction mixture into a second-stage reactor, and continuously feeding a fresh portion of the same ketone into the second-stage reactor to give rise to a reaction.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: January 14, 2003
    Assignee: Maruzen Petrochemical Co., Ltd.
    Inventors: Hideki Omori, Goro Sawada, Hideo Fukuda, Kazuhiro Imanishi, Tomohiko Sato