Patents by Inventor Kathleen Y. Yau

Kathleen Y. Yau 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).

  • Fluid catalytic cracking process for increased formation of isobutylene and isoamylenes
    Patent number: 5243121
    Abstract: A composite fluid catalytic cracking catalyst comprising a non-zeolitic component of at least 45% Al.sub.2 O.sub.3 and containing .ltoreq.30% Y zeolite with unit cell size .ltoreq.24.29 .ANG., the matrix (non-zeolitic component) of said catalyst having a B.E.T. surface area .gtoreq.50 m.sup.2 /g and a catalyst Lewis/Bronsted acid site ratio of .gtoreq.1.5 wherein the total number of Bronsted acid sites is .ltoreq.30 micromoles/g of catalyst. The catalyst is used to increase the isobutylene and isoamylenes content of cracked products obtained in a fluid catalytic cracking unit.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: September 7, 1993
    Assignee: Engelhard Corporation
    Inventors: Rostam J. Madon, Gerald S. Koermer, Michel Deeba, Kathleen Y. Yau