Patents by Inventor Elliot P. Hertzengerg

Elliot P. Hertzengerg 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 dealumination and ion exchange of zeolites
    Patent number: 5057472
    Abstract: The instant invention comprises a process for concurrently dealuminating and ion exchanging an acid stable sodium ion-containing zeolite by contacting the zeolite with an about 0.5M to about 3M nitric acid solution containing ammonium nitrate in an amount sufficient to fully exchange the sodium ions for ammonium and hydrogen ions at a temperature of at least about -10.degree. C. The instant invention also relates to the zeolites thus prepared by the instant process and catalysts prepared utilizing these zeolites.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: October 15, 1991
    Assignee: Shell Oil Company
    Inventors: Elliot P. Hertzengerg, Brendan D. Murray, Gary M. Pasquale, Bruce H. C. Winquist