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, 1994
Filed:
Aug. 24, 1992
Leslie C Hardison, Barrington, IL (US);
Ari Technologies, Inc., Palatine, IL (US);
Abstract
A process for removal of dissolved H.sub.2 S from condensed geothermal steam that includes the steps of cooling and oxygenating the sour steam condensate by contacting the sour condensate with air in a cooling tower; collecting the oxygenated condensate in a cooling tower collection basin and initially adding a polyvalent metal chelate catalyst, e.g., iron chelate catalyst solution, to the sour condensate at a very low concentration, e.g., about 0.1 ppm to about 10 ppm, preferably about 0.5 ppm to about 1 ppm by weight, and periodically or continuously adding, to the solution, a chelating agent for the polyvalent metal to account for chelon degradation to maintain active polyvalent metal chelate solution at a concentration of about 0.1 ppm to about 10 ppm, preferably about 0.5 ppm to about 1 ppm by weight. The dissolved H.sub.2 S is removed, by oxidation to sulfur, without the addition of polyvalent metal, e.g., iron, to the solution, and without blowdown of the condensate circulated through the cooling tower.