Patents by Inventor R. Bruce Calvert

R. Bruce Calvert 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).

  • Isomerization of aromatic compounds over ZSM-22 zeolite
    Patent number: 5254770
    Abstract: A mixture of aromatic hydrocarbons, comprising xylenes, is isomerized in the presence of ZSM-22 zeolite to produce a product stream wherein the proportion of para-xylene is substantially equal to the equilibrium ratio of the para-isomer. The process is conducted at about 500.degree. F. to about 1100.degree. F., at about 0 to about 3000 psig, optionally in the presence of hydrogen, and also optionally with the catalyst comprising about 0.005% to about 5.0% of a metal, e.g., platinum, palladium or cobalt, based on total catalyst weight.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: October 19, 1993
    Assignee: Mobil Oil Corp.
    Inventors: David H. Olson, Ernest W. Valyocsik, R. Bruce Calvert