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. 29, 1977
Filed:
Apr. 07, 1975
Applicant:
Inventor:
Leslie C Hardison, Barrington, IL (US);
Assignee:
Air Revources, Inc., Palatine, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423575 ;
Abstract
Hydrogen sulfide is removed from a gas stream by reaction with sulfur dioxide to form sulfur in the presence of an aqueous chelated iron solution as a catalyst or oxidation-reduction reagent. The reaction of hydrogen sulfide with sulfur dioxide is carried out in a first contacting zone, and the chelated iron solution is contacted with sulfur dioxide in a second contacting zone and then recycled to the first contacting zone. As applied to the treatment of a Claus process tail gas, the first contacting zone is interposed before the tail gas incinerator, and the second contacting zone is used to remove sulfur dioxide from the incinerator effluent gas.