The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2005
Filed:
Mar. 29, 2004
Thomas L. Bunn, Simi Valley, CA (US);
Stephen C. Hurlock, Simi Valley, CA (US);
Alan Z. Ullman, Northridge, CA (US);
Thomas L. Bunn, Simi Valley, CA (US);
Stephen C. Hurlock, Simi Valley, CA (US);
Alan Z. Ullman, Northridge, CA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A method and apparatus for removing BHP contaminants (alkali hydroxide and HO) 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 HOremaining 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.