Patents by Inventor Virgil G. Fox, Jr.

Virgil G. Fox, Jr. 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).

  • Selective white liquor oxidation
    Patent number: 5382322
    Abstract: A method for white liquor oxidation in a kraft mill utilizes a two-stage selective oxidation system in which the first stage is operated to remove sulfide while the second stage is operated to oxidize a significant fraction of the remaining oxidizable sulfur compounds to sulfate. The resulting selectively oxidized white liquor products are used as alkali sources for various process steps in the mill. Optionally, white liquor can be oxidized in a single stage to convert a significant fraction of the oxidizable sulfur compounds to sulfate. Methods for controlling the selective oxidation process are disclosed.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: January 17, 1995
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Vincent L. Magnotta, Ronald C. Naddeo, Varin Ayala, John F. Cirucci, Virgil G. Fox, Jr.