METHOD FOR PRODUCING AN INHIBITOR OF CARBON DIOXIDE AND HYDROGEN SULFIDE CORROSION Russian patent published in 2018 - IPC C23F11/04 C23F11/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used to protect oilfield equipment from corrosion in mineralized water and water-oil environments containing carbon dioxide and hydrogen sulphide. Method includes preparation of an active inhibitor base by reacting a mixture of alkylamines selected from the group consisting of cocoamine, tallow amine, ethylenediamine, diethylenetriamine, aminoethylethanolamine, aminoethylpiperazine and piperazine, with a triglyceride or a product of its processing selected from the group consisting of rapeseed oil, soybean oil, tall oil, fatty acid methyl ester, fatty acid ethyl ester, biodiesel and tall oil fatty acid, the reaction being carried out by distilling off the water and/or alcohol produced at a temperature of 140–240 °C and turbulent mixing of the reaction mass with the release of glycerol, water and/or alcohol, and a quaternary ammonium compound in the form of benzalkonium chloride is added to the obtained aqueous alcohol solution of the active base of the inhibitor, with the following component ratio, %: active base of corrosion inhibitor 20.0–40.0; benzalkonium chloride 10.0–30.0; aqueous-alcoholic solution 65.0–95.0.

EFFECT: increase protection against carbon dioxide and hydrogen sulfide corrosion.

1 cl, 4 ex