Patents by Inventor Kenji Chiwaki

Kenji Chiwaki 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 producing propylene oxide
    Patent number: 7994348
    Abstract: A process for producing propylene oxide, which comprises: supplying a solution containing a peroxide selected from the group consisting of hydrogen peroxide and organic hydroperoxide having 2 or more of carbon atoms as a raw material and propylene to an epoxidation step to react the peroxide with propylene, and controlling a concentration of methyl hydroperoxide in the solution to be supplied to the epoxidation step.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: August 9, 2011
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kenji Chiwaki, Kazuo Suzuki, Shigenori Shiraishi