Corrosion inhibitor

Abstract

The present invention is directed to an aqueous amine resin corrosion inhibitor composition and methods of using the same for inhibiting corrosion in equipment in contact with alkanolamine, hot carbonate solutions, diglyme and/or other solvents and acid gases such as carbon dioxide, hydrogen sulfide or a mixture of the two. The inhibitor preferably relates to compositions useful for inhibiting corrosion in environments in contact with alkanolamine, hot carbonate solutions, diglyme, and/or solvent gas treating systems and acid gases, and more particularly, to an amine resin solution made by reacting sterically hindered amines such as those selected from the group consisting of alkyl diamines, alkyltriamines, amino alcohols and mixtures thereof with aldehydes, aldehyde donors, the reaction product of lower alkanolamines and lower aldehydes, and mixtures thereof. The subject compositions are preferably made by reacting the sterically hindered amines and aldehyde compounds in about a 1:1 molar ratio at a temperature ranging from about 110° F. to 120° F., using a sufficient amount of the sterically hindered amine to produce a reaction product having a pH ranging from about 10.5 to about 12.0.

Dependencies are inferred from the claim text.