Ionic polymers used as corrosion inhibitors in process streams in industrial systems and their method of obtaining
AssigneeInstituto Mexicano Del Petroleo
InventorsDiego Javier Guzmán Lucero, Mercedes Bazaldua Domínguez, Araceli Vega Paz, Natalya Victorovna Likhanova
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Abstract
The present disclosure relates to ionic copolymers and terpolymers derived from monomers such as 1-alkyl-3-vinylimidazolium halides, 1-vinylimidazole, acrylamide, n-vinylpyrrolidone, and poly(ethylene glycol) methyl ether methacrylate, and their use as corrosion inhibitors in process streams in industrial systems, more specifically in oil refinery streams. The corrosion inhibitors function at concentrations below 100 ppm, temperatures up to 60° C., and in the presence of congenital waters or synthetic brines.
Claims6
An ionic copolymer comprising two repeating units in a polymer chain, wherein the repeating units comprise a composition having a chemical structure of a chemical formula selected from the group consisting of Formula (3), Formula (4), Formula (5), and Formula (6):
- wherein:
- R1 is selected from a linear alkyl chain of 2 to 4 carbon atoms and X− is selected from Cl−, Br−, or I−, and the letters n, m, o, p, and q correspond to degrees of polymerization of each repeating unit;
- R2 is selected from a linear chain of 1 or 2 carbon atoms and Y− is selected from CH3SO3− or CH3CH2SO3−;
- and
- the two repeating units have an initial molar ratio (x, y) between the monomers, wherein x is between x=0.1 and 0.9, and wherein y is y=1−x and x+y is equal to one, and
- wherein the ionic copolymer functions as a corrosion inhibitor for metals and their alloys in process streams in industrial systems.
An ionic terpolymer comprising three repeating units in a polymer chain, wherein the repeating units comprise a composition having a chemical structure of a chemical formula selected from the group consisting of Formula (7) and Formula (8):
- wherein:
- R1 is selected from a linear alkyl chain of 2 to 4 carbon atoms and X− is selected from Cl−, Br−, or I−, and the letters n, m, o, p, q, and r correspond to degrees of polymerization of each repeating unit;
- and
- R2 is selected from a linear chain of 1 or 2 carbon atoms and Y− is selected from CH3SO3− or CH3CH2SO3, and initial molar ratios are (x, y, z) respectively, where z is considered to vary from 0.2 to 0.4, and from 0.2 to 0.4, and x=100−y−z, and where the sum of the molar ratios x+y+z=1, and
- wherein the ionic terpolymer functions as a corrosion inhibitor for metals and their alloys in process streams in industrial systems.
Dependencies are inferred from the claim text.