Patents by Inventor John F. Cirucci

John F. Cirucci 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).

  • Method for producing fully oxidized white liquor
    Patent number: 5500085
    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: November 4, 1994
    Date of Patent: March 19, 1996
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Vincent L. Magnotta, Varin Ayala, John F. Cirucci
  • 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.
  • Control of chemical dosage to a pulp slurry
    Patent number: 5306391
    Abstract: A method is disclosed for controlling a desired chemical dosage to a stream of cellulosic pulp heated by the addition of steam wherein the pulp flow rate is determined indirectly by measuring the pulp temperature after steam addition and calculating the pulp flow rate by heat balance. Changes in pulp flow rate are reflected by changes in pulp temperature at known steam addition rates, and the chemical flow rate is adjusted accordingly to maintain constant chemical dosage. The method is particularly useful in controlling oxygen dosage in oxygen delignification and bleaching processes.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: April 26, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John F. Cirucci, Harold H. Gunardson