Aqueous aldehyde solutions for trapping hydrogen sulfide in natural gas and crude oil producing plants
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United States of America Patent
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Jul 6, 1993
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N/A
app pub date -
Jul 7, 1992
filing date -
Aug 23, 1989
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Abstract
Aqueous aldehyde solutions for trapping hydrogen sulfide comprising 5 to 50% by weight of an aldehyde and 1 to 5% by weight, relative to the aldehyde solution of a formulation comprising a) 10 to 80% by weight of a long-chain quaternary ammonium compound and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol, b) 10 to 80% by weight of a condensation product of a C.sub.12 -C.sub.18 -fatty acid with a polyethylene polyamine of the formula NH.sub.2 --(C.sub.2 H.sub.4 --NH).sub.x --C.sub.2 H.sub.4 --NH.sub.2 in which x is 1, 2 or 3 and the molar ratio of fatty acid to basic nitrogen in the polyethylene polyamine is 3:1 to 3:2, and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol, or c) 50 to 95% by weight of the fatty acid-polyethylene polyamine condensation product as defined in b) and 5 to 50% by weight of a nonionic or anionic surfactant.
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