Oxidation of sulfides in polymer-thickened aqueous solution

Details Oxidation of sulfides in polymer-thickened aqueous solution Oxidation of sulfides in polymer-thickened aqueous solution

C - Chemistry, Metallurgy

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C02F 1/72 (2006.01) C09K 8/12 (2006.01) C09K 8/588 (2006.01) C09K 8/68 (2006.01) E21B 43/04 (2006.01)

Patent

CA 1262783

ABSTRACT A method for preferentially oxidizing sulfide in a viscous, aqueous solution of a hydratable poly- meric material suitable for use in hydraulically treating subterranean formations. The sulfide is oxidized by incorporating hydrogen peroxide and a free radical scavenger into the aqueous solution at a pH between 3 and 10. After oxidation of the sul- fide the stability of hydratable polymers is at least as good as in the original solution.

486871

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