Corrosive activity of aqueous amine solutions contaminated with degradation products

Abstract

An urgent problem in oil refineries during amine gas purification is the formation of a degradation product. Which leads to corrosion of equipment, foaming of systems, deterioration of mass transfer, violation of technological standards, and more. This article considers the effect of anion concentrations with which amines form thermostable salts. A number of experiments were carried out in which the gravimetric method was used to determine the corrosion rate of steels 20 and 09G2S. Based on the test results, the limiting concentrations of individual thermostable salts. The article also presents the results of studies of the dependence of the corrosion rate on the pH of solutions, concentrations of methyldiethanolamine and acids. The effectiveness of cleaning on ion-exchange resins on real working solutions of methyldiethanolamine refineries has also been proven. Keywords: thermostable salts; acetate; format; oxalate; corrosion rate; amine; ion exchange; ion exchange resins.