Patents by Inventor Daniel Connell

Daniel Connell 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).

  • Process for improving chlorine dioxide bleaching of pulp
    Patent number: 9057156
    Abstract: The invention is directed to a method for increasing brightness of pulp, wherein the method includes: contacting a pulp slurry with chlorine dioxide in a final D (ClO2) bleaching stage; and adding a brightening additive to the final D bleaching stage after at least a portion of the chlorine dioxide has been consumed, in an amount sufficient to increase brightness of the pulp; wherein the brightening additive is an inorganic compound chosen from hypochlorous acid, one or more precursor compounds that form hypochlorous acid in said final D bleaching stage, or a mixture thereof.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: June 16, 2015
    Assignee: SKZO NOBEL CHEMICALS INTERNATIONAL B.V.
    Inventors: Douglas W. Reid, John Atwood, Scott Carmichael, Daniel Connell
  • PROCESS FOR IMPROVING CHLORINE DIOXIDE BLEACHING OF PULP
    Publication number: 20130269891
    Abstract: The invention is directed to a method for increasing brightness of pulp, wherein the method includes: contacting a pulp slurry with chlorine dioxide in a final D (ClO2) bleaching stage; and adding a brightening additive to the final D bleaching stage after at least a portion of the chlorine dioxide has been consumed, in an amount sufficient to increase brightness of the pulp; wherein the brightening additive is an inorganic compound chosen from hypochlorous acid, one or more precursor compounds that form hypochlorous acid in said final D bleaching stage, or a mixture thereof.
    Type: Application
    Filed: December 19, 2011
    Publication date: October 17, 2013
    Applicant: Akzo Nobel Chemicals International B.V.
    Inventors: Douglas W. Reid, John Atwood, Scott Carmichael, Daniel Connell