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. 14, 1976
Filed:
Jan. 17, 1975
Applicant:
Inventors:
James M Henderson, New Brunswick, NJ (US);
William H Wetherill, Staten Island, NY (US);
Assignee:
Asarco Incorporated, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423539 ; 423236 ; 423243 ; 423245 ;
Abstract
SO.sub.2 is removed from a SO.sub.2 -containing gas mixture utilizing an aromatic amine as absorbent, followed by scrubbing the SO.sub.2 -depleted, aromatic amine-enriched effluent gas with sulfurous acid-and ammonium sulfate-containing aqueous solution to remove substantially all of the gaseous aromatic amine from the gas. The effluent gas is discharged ultimately to the atmosphere without any additional scrubbing of the gas, after its discharge from the sulfurous acid scrubbing zone, with sulfuric acid solution or any other acid solution or any acid.