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:
Mar. 08, 1977
Filed:
Mar. 05, 1975
Applicant:
Inventors:
Robert A Mancini, Elk Grove Village, IL (US);
David M Cyr, Lombard, IL (US);
Assignee:
Air Resources, Inc., Palatine, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4235 / ; 423224 ; 423226 ;
Abstract
Hydrogen sulfide is removed from a gas stream in an oxidation-reduction system by contacting the gas stream with an aqueous chelated iron solution in which the iron is in the ferric state to absorb hydrogen sulfide and convert it to elemental sulfur. The solution is regenerated by aeration. A redox electrode is used to monitor the oxidation potential of the solution, and corrective action is taken, as required, to maintain the concentration of ferric iron in the solution so as to achieve efficient removal of hydrogen sulfide.