METHOD FOR PREPARING ACID CORROSION INHIBITOR AND METHOD OF ITS APPLICATION Russian patent published in 2017 - IPC C07D233/84 C23F11/16 

FIELD: chemistry.

SUBSTANCE: invention relates to the method for preparing an acid corrosion inhibitor-4.5-dihydroxyimidazolidine-2-thione by condensation of glyoxal and thiourea, consisting in the process being carried out at 45°C for two hours, a water-ethyl acetate mixture is used as a solvent, and the reagents are taken in the following molar ratios: Glyoxal 1.0: Thiourea 1.0: Ethyl acetate 0.2. The invention also relates to the method for using the prepared inhibitor by adding it to solutions of inorganic acids in the amount of 0.5 wt % of the solution.

EFFECT: new method of preparing a compound has been developed, characterized by the simplicity and high yield of the desired product.

2 cl, 1 tbl, 1 ex