FIELD: chemistry.
SUBSTANCE: invention relates to chemical reagents - hydrogen sulphide scavengers, and can be used in oil and gas production, oil and gas refining for neutralising hydrogen sulphide and light mercaptans in hydrocarbon-containing media. Disclosed is a hydrogen sulphide scavenger which contains an alkali metal hydroxide and/or an organic base (0.03-15 wt %), a nonionic surfactant (0.5-25 wt %) and hemiformal(s) of a lower aliphatic alcohol (the balance). The nonionic surfactant is preferably polyethers based on glycerol (Laprols) or oxyalkylated glycols (Proxanols) or oxyalkylated ethylenediamine (Proxamines) or oxyethylated alkylphenols (Neonols) or mixtures thereof. The disclosed scavenger-demulsifier also has bactericidal effect on sulphate-reducing bacteria.
EFFECT: intensifying processes of producing the scavenger and neutralising hydrogen sulphide in hydrocarbon-containing media, creating a reagent with complex action, which combines properties of a hydrogen sulphide scavenger and a demulsifier of oil-water emulsions, having low corrosiveness.
4 cl, 1 tbl, 18 ex
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