Patents by Inventor Oscar R. Chamberlain

Oscar R. Chamberlain 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).

  • Modified Y-zeolite, process for the preparation thereof, and modified Y-zeolite-containing FCC catalyst
    Patent number: 5576258
    Abstract: A process for preparing a modified Y-zeolite, in which a NaY-zeolite is first subjected to an ammonium exchange, the resulting ammonium-exchanged zeolite is subjected to an aluminum exchange, the aluminum-exchanged zeolite is subjected to a steam calcination, and a phosphorus component is incorporated into the steam calcined zeolite, is disclosed. The modified Y-zeolite obtained by this process and an FCC catalyst containing the modified Y-zeolite are also disclosed. The FCC catalyst containing the aluminum-exchanged phosphorus-containing Y-zeolite prepared according to the present invention shows less coke make, and an improved selectivity to C.sub.3 olefins compared to FCC catalysts containing zeolites which have either been aluminum exchanged or contain phosphorus.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: November 19, 1996
    Assignee: Petroleo Brasileiro S.A. Petrobras
    Inventors: Oscar R. Chamberlain, Eduardo F. Souza-Aguiar, Avelino C. Canos