Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1982-03-15
1984-06-19
Thomas, Earl C.
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423224, 423226, 423573G, 423578R, 210764, 422 28, 422 35, 422 36, 422 37, C01B 1704, B01D 5334
Patent
active
044552874
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.
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"1981 NPRA Q & A Session on Refining and Petrochemical Technology" NPRA Sessions Held in Oct. 1981, pp. 138, 139.
Kin Frederick R.
Primack Harold S.
Reedy Dom E.
Ari Technologies, Inc.
Thomas Earl C.
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