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. 22, 1981
Filed:
May. 15, 1979
Societe Nationale Elf Aquitaine (Production), Paris, FR;
Abstract
The invention concerns a process for the purification of residual industrial gases containing a small quantity of H.sub.2 S, SO.sub.2, CS.sub.2 COS, or possibly sulfur vapor, as well as large amounts of H.sub.2 O, CO.sub.2 and N.sub.2 in which the residual gases are first subjected to a catalytic reduction in which all the sulfur compounds are transformed into H.sub.2 S, and thereafter washed by an aqueous amine solution before being burnt and discarded into the atmosphere, while the aqueous amine solution is regenerated by heating and the gases given off, comprising H.sub.2 S and CO.sub.2, are returned to the sulfur manufacturing plant. The process is characterized in that the temperature of the gas to be treated is permanently maintained at a level higher than the dew-point of the water contained in the gases at all points of the process, thereby insuring that substantially all H.sub.2 O contained in the residual gases is discarded into the atmosphere.