PL403752A1 - Corrosion inhibitor to protect the mining facilities, pipelines transporting oil and oil tanks and a method for its manufacture - Google Patents

Abstract

Corrosion inhibitor for the protection of mining equipment, crude oil pipelines and crude oil tanks, contains: - component a) in an amount from 0.155 to 85% by mass, resulting from the processes carried out: A) - neutralization from 0.1 to 50% by mass a new mixture of modified imidazoline derivatives, of general formulas (1) and (2), being the product of the condensation of diethylenetriamine with fatty acids containing from 12 to 22 carbon atoms in the molecule and aliphatic dicarboxylic acids containing from 2 to 12, with the possible addition of 0.05 to 20% by mass of a known condensation product of diethylenetriamine with fatty acids containing from 12 to 24 carbon atoms per molecule, prepared by a known method at a temperature of 180 - 280°C, of the general formula (1'), an aliphatic and/or aromatic monocarboxylic acid containing from 1 to 7 atoms carbon in the molecule, used in an amount from 0.025 to 25% by mass, while maintaining the mass ratio of the mixture of compounds of general formulas (1), (2) and optionally (1') to the monocarboxylic acid 1: 0.15 - 0.70, with preparation of an intermediate product, which is a mixture of compounds of general formulas (5), (6) and optionally (5') and a mixture of unneutralized compounds of general formulas (1), (2) and optionally (1') and B) - subjecting the obtained product transitional, being a mixture of compounds of general formulas (5), (6) and optionally (5') and a mixture of non-neutralized compounds of general formulas (1), (2) and optionally (l'), action of fatty acids containing from 12 to 22 carbon atoms in the molecule, used in an amount of from 0.03 to 10% by mass, and/or fatty acid polymers containing from 18 to 54 carbon atoms in the molecule, used in an amount of from 0.03 to 10% by mass, maintaining the mass ratio of the total the mass of the mixture of compounds of general formulas (1), (2) and optionally (1') used in the process into fatty acid and/or polymers amounting to 1: 0.02 - 0.5, obtaining a product containing a mixture of compounds of general formulas ( 7), (8) and optionally (7'), where after the process B) is completed, component a) has pH = 6.5 - 7.5 and contains a product that is a mixture of compounds with formulas (5), (6) and optionally (5') and a product which is a mixture of compounds of formulas (7), (8) and optionally (7'); - component b), which are ethoxylated fatty amines containing from H to 22 carbon atoms in the molecule and from 2 to 22, preferably from 5 to 15 ethoxy groups in the molecule, in an amount from 0.01 to 20% by mass; - optionally component c), which are aliphatic polyols, in an amount from 0.1 to 50% by mass; - component d), which are aliphatic alcohols containing from 1 to 6 carbon atoms per molecule, optionally with the addition of water, in an amount from 15.0 to 99.6% by mass; and optionally component e), which is an antifoam agent in an amount of 0.01 to 2% by mass.