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:
Jun. 19, 1984
Filed:
Mar. 15, 1982
Harold S Primack, Skokie, IL (US);
Dom E Reedy, Shreveport, LA (US);
Frederick R Kin, Park Forest, IL (US);
ARI Technologies, Inc., Palatine, IL (US);
Abstract
An aqueous oxidation-reduction composition and method for removing hydrogen sulfide gas from a fluid stream by liquid phase oxidation of the hydrogen sulfide to elemental sulfur with a chelated polyvalent metal catalyst, such as iron, wherein the composition is stabilized against rapid loss of chelated polyvalent catalyst caused by contamination of the aqueous composition with micro-organisms, such as bacteria. The aqueous composition is stabilized by incorporating in the aqueous composition and adding throughout the normal usage thereof a broad spectrum biocide in an amount which acts as a bacteriostat to prevent rapid growth of bacteria in the aqueous composition and when the bacteria concentration rises above about 1.times.10.sup.6 colonies per ml. slug-feeding in a kill concentration into the aqueous composition while the chelated polyvalent metal catalyst is being contacted with oxygen a fast acting broad spectrum biocide, such as 2,2-dibromo-2-cyanoacetamide or glutaraldehyde, and thereafter resuming addition of the first mentioned biocide.