WATER-SOLUBLE INHIBITOR OF CORROSION FOR PROTECTION OF OPERATING PIPES AND PIPELINES FOR NATURAL GAS AND ALSO METHOD OF ITS OBTAINING Russian patent published in 2018 - IPC C09K8/54 C23F11/04 

FIELD: chemistry.

SUBSTANCE: component a) - a mixture of modified imidazoline derivatives is produced, the condensation reaction of diethylenetriamine with fatty acids and aliphatic dicarboxylic acids is carried out at a temperature of at least 140°C. A mixture of aminoamides with an acid number of <10 mg Koh/g is produced. At a temperature above 180°C, the condensation reaction is carried out. A mixture of compounds with an acid number of <1 mg KOH/g in an amount of 0, 1-50 wt % is produced. The mixture is neutralized at room temperature in the reaction medium containing the component e) - aliphatic alcohols in the amount of 15-99.7 wt %, aliphatic and/or aromatic monocarboxylic acid in an amount of 0.05-25 wt %. The final product is produced, and the next components: b) - oxyethylene fatty amines, c) an alkalinizing agent and f) - defoamer are added to the component a) in an amount of 0.15-75 wt % and the component e).

EFFECT: increasing the corrosion resistance of the corrosion inhibitor.

14 cl, 1 tbl, 13 ex