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:
Sep. 18, 1990
Filed:
Nov. 21, 1988
Joseph E Cichanowicz, Sunnyvale, CA (US);
Patrick Maroney, Orinda, CA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A process is provided for removing nitrogen oxides and sulfur dioxide from gaseous mixtures in the presence of a metal chelating agent. These gaseous contaminants are converted to hydroxylaminedisulfonates which are decomposed to ammonium ions and sulfate ions at pH of 4.2 or less. This decomposition step also converts the metal ion of the metal chelating agent to a reusable form. The ammonium ions are separated by column sorption, eluted and thermally reacted with nitrogen oxides to form nitrogen and water. The sulfate ions are removed as a sulfate salt precipitate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile