Study of aminoesters of synthetic petroleum acid produced by aerobic oxidation of naphthen-paraffin hydrocarbons, as corrosion inhibitors

This article presents the results of research in the field of synthesis of amino esters obtained on the basis of mono, di, triethanolamine and synthetic petroleum acid in a molar ratio of 1:1.The structure and structure of the obtained substances were confirmed by IR spectroscopy. The inhibitor-bactericidal effect of amino esters on the corrosion process has been studied. The inhibitory effect of the synthesized amino esters on CO2 steel corrosion at concentrations of 25, 50, and 100 mg/L was studied. Samples T-1, T-2, T-3 at a concentration of 25 mg/l for 20 hours showed an inhibitory effect of 40,36…74,15%, respectively, at a concentration of 50 mg/l, respectively 79,96…92,04 %, at a concentration of 100 mg/l, respectively, 98,09…99,59%. In order to study the antimicrobial activity of the obtained amino esters, their solutions were prepared in various media (isopropyl alcohol 60%) at five different concentrations (5; 50; 500; 600; 700 mg/l) and their effect on the vital activity of sulfate-reducing bacteria (SRB) was studied at 30…32 °C for 15 days. It has been established that at a concentration of 600 mg/l, the synthesized amino esters ex hibit a 95,2…100% bactericidal effect, and at a concentration of 700 mg/l, they exhibit a 100% bactericidal effect, completely suppressing the vital activity of bacteria. The synthesized complexes exhibit a higher bactericid al effect even at low concentrations. Thus, the bactericidal and CO2-corrosion-inhibiting properties of amino esters synthesized on the basis of synthetic petroleum acid obtained in the process of aerobic oxidation of paraffin-naphthenic hydrocarbons isolated from the diesel fraction (boiling range 190…330 °C) in the presence of transition-metal–modified nanosized γ-Al2O3 catalyst, and ethanolamines.

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