Corrosion inhibitors of the SNPKh brand. 2. The P,N-Containing corrosion inhibitor for protection of oil-field equipment

Series of functionalized pyridinium alkyl[poly(oxyethylene)] phosphites, isoquinolinium alkyl[poly(oxyethylene)] phosphites, pyridinium aryl[poly(oxyethylene)] phosphites, and isoquinolinium aryl[poly(oxyethylene)] phosphites were obtained and their properties were studied systematically. Some of them were found to be effective corrosion inhibitors in aqueous CO2-and H2S-containing media. Isoquinolinium dodecyl-and dodecylphenyl[dodeca(oxyethylene)] phosphites proved to be the best inhibitors. The isoquinolinium aryl[poly(oxyethylene)] phosphites obtained were used to create a new corrosion inhibitor.