REAGENT FOR INHIBITION OF ACID CORROSION AND METHOD OF PRODUCTION INHIBITED ACIDS (VERSIONS) Russian patent published in 2001 - IPC

FIELD: production of reagents for inhibition of acid corrosion and methods of production of inhibited acids applicable in oil-producing, machine-building, chemical and other industries. SUBSTANCE: reagent for inhibition of acid corrosion is used in the form of product of reaction of still residue of aniline production and 12-% aqueous solution of hydrochloric acid (with their ratio of 1:(2-3). Method of production of inhibited sulfuric acid includes dilution of sulfuric acid with water and introduction of said reagent for inhibiting of acid corrosion. In production of inhibited hydrochloric of mixture of hydrochloric and hydrofluoric acids, acid is diluted with water and reagent for inhibition of acid corrosion is introduced. Reagent is used in the form of said reaction product and halide or surfactant additionally introduced. In preferable versions of method of production of inhibited acids, formaldehyde-containing compound is additionally introduced into acid solution. EFFECT: higher efficiency of reagent for inhibition of acid corrosion and method of production of inhibited acids. 5 cl, 2 tbl, 43 ex