Patents by Inventor Stephen C. Hurlock

Stephen C. Hurlock 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).

  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Patent number: 7195740
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: March 27, 2007
    Assignee: The Boeing Company
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman
  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Patent number: 6922429
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: July 26, 2005
    Assignee: The Boeing Company
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman
  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Publication number: 20040179990
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 16, 2004
    Applicant: THE BOEING COMPANY
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman
  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Publication number: 20040179572
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 16, 2004
    Applicant: THE BOEING COMPANY
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman
  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Patent number: 6763051
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: July 13, 2004
    Assignee: The Boeing Company
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman
  • Treatment of chloralkali feeds containing hydrogen peroxide and base
    Publication number: 20030215382
    Abstract: A method and apparatus for removing BHP contaminants (alkali hydroxide and H2O2) from a recycled aqueous alkali chloride solution stream before the stream is fed to a chloralkali cell so that the contaminants do not impair the operation of a chloralkali cell. Unwanted alkali hydroxide within the recycled alkali chloride brine solution is reacted with chlorine gas and converted into an alkali chloride, which is useful in the operation of the chloralkali cell, and oxygen gas, which is outgassed from the system. Any H2O2 remaining in the recycled stream after elimination of the alkali hydroxide is reacted with chlorine to form HCl and oxygen gas. The HCl raises the pH of the brine solution, after which the pH may be adjusted by the addition of supplemental alkali hydroxide.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 20, 2003
    Inventors: Thomas L. Bunn, Stephen C. Hurlock, Alan Z. Ullman