Patents by Inventor Mitsue Ishii

Mitsue Ishii 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).

  • Halogen-containing catalyst and process for the preparation thereof
    Patent number: 6518470
    Abstract: The present invention is directed to a halogen-containing catalyst which contains one or more halogen components and in which the halogen amount distribution in the catalyst is uniform, and a process for preparing a halogen-containing catalyst which comprises the steps of supporting one or more halogen components on an L type zeolite, and then drying it at a water evaporation rate of 15% by weight/hour or less. According to the present invention, there can be provided the catalyst in which the halogen amount distribution in the catalyst is uniform, so that a cracking activity can be reduced, and the process for preparing the catalyst.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: February 11, 2003
    Assignees: Idemitsu Kosan Co., Ltd., Chevron Phillips Chemical Company
    Inventors: Tetsuya Fukunaga, Mitsue Ishii