FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to composition absorbing hydrogen sulphide to be added to green oil. This composition eliminates hydrogen sulphides to be migrated into water phase to be removed from green oil and comprises glyoxal and catalyst. Note here that said catalyst comprises ammonium quaternary salt of formula I: R1R2R3R4N+X- (I), where every of R1, R2, R3 and R4 independently represents alkyl group including 1 to 30 carbon atoms, aryl group including 6 to 30 carbon atoms or aryl alkyl group including 7 to 30 carbon atoms, while X represents halide, sulphate, nitrate or carboxylate.
EFFECT: efficient removal.
18 cl, 4 tbl, 3 ex
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