Patents by Inventor Francis X. Ryan

Francis X. Ryan 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).

  • pH control by bulky organic bases during noble-metal exchange of zeolite catalysts
    Patent number: 4874504
    Abstract: A method is disclosed which provides improved control over the noble-metal exchange of zeolite catalyst by using bulky organic bases to control pH during the metal loading step.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: October 17, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Roland von Ballmoos, Francis X. Ryan
  • Method for removing organic residue from as-synthesized zeolites
    Patent number: 4851200
    Abstract: There is provided a three-step method for removing the residue of an organic directing agent from as-synthesized zeolites. The first step involves contacting the as-synthesized zeolite with an aqueous solution of a fluorosilicate salt such as ammonium fluorosilicate. The second step involves ion-exchanging the zeolite with an alkali metal or alkaline earth metal salt such as KCl. The third step involves calcining the ion-exchanged zeolite. This method is particularly useful for removing the residue of an organic directing agent from ZSM-18.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: July 25, 1989
    Assignee: Mobil Oil Corporation
    Inventor: Francis X. Ryan
  • Ph control by bulky organic bases during noble-metal exchange of zeolite catalysts
    Patent number: 4814306
    Abstract: A method is disclosed which provides improved control over the noble-metal exchange of zeolite catalyst by using bulky organic bases to control pH during the metal loading step.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: March 21, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Roland Von Ballmoos, Francis X. Ryan