INHIBITOR OF HYDROGEN SULPHIDE AND CARBON DIOXIDE CORROSION IN MINERALISED AQUEOUS MEDIA Russian patent published in 2016 - IPC C23F11/167 

FIELD: technological processes.

SUBSTANCE: invention relates to protection of metals from corrosion in highly mineralised mediums containing hydrogen sulphide and carbon dioxide with use of inhibitors and can be used in production, preparation, transportation and processing of oil. Inhibitor contains a product of reaction of 2-alkyl imidazoline with phosphorous acid derivative (PV-1), or product of reaction of 2-alkyl imidazoline with product of reaction of oxyethylated alkylphenol or oxyethylated alcohols, or oxyethylated fatty acids with phosphorous acid derivative (PV-2) and a solvent in the following proportions, wt%: PV-1 or PV 2 - 20.0-70.0 and solvent - the rest.

EFFECT: creation of a corrosion inhibitor, effectively protecting from hydrogen sulphide and carbon-dioxide corrosion at high mineralisation of formation water with congelation temperature from -45 to -55°C and expansion of inhibitors raw material base.

6 cl, 2 tbl, 13 ex