Corrosion inhibition with alkoxy aromatic imidazolines
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMohammad Abu Jafar Mazumder, Shaikh Asrof Ali, Hasan Ali Al-Muallem
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Abstract
An aminoalkyl imidazolines of the formula: having p-octyloxy-, p-dodecyloxy-, or p-octadecyloxy-phenyl pendants as hydrophobes, for use to mitigate mild steel corrosion. An electron-rich aromatic ring, in conjugation with an amidine motif, imparts increasing corrosion inhibition efficiencies with an increasing hydrophobe chain length. X-ray photoelectron spectroscopy confirms the formation of an aminoalkyl imidazoline film on a metal surface prior to reaching a critical molar concentration.
Claims14
A composition comprising an aminoalkyl imidazoline of formula (I)
- wherein m is an integer of 2 to 4;
- R is a C2 alkylene;
- R1 is an aromatic hydrocarbon of formula (II)
- wherein X is oxygen;
- R′1 to R′4 are each independently selected from the group consisting of hydrogen, C1-C30 alkyl, aminoalkyl, and aminoaryl;
- R′5 is a C5-C30 alkyl group;
- and
- R2 and R3 and are each independently selected from the group consisting of hydrogen, hydroxyl, halogen, C1-C30 alkyl, alkenyl, aryl, alkylaryl, arylalkyl, aminoalkyl, aminoaryl, (CH2)2COOH, CH2CH(CH3)COOH, and imidazoline.
A method of preventing or reducing corrosion, comprising:
- adding to a process stream an effective corrosion inhibiting amount of one or more aminoalkyl imidazolines of formula (I)
- wherein m is an integer of 2 to 4;
- R is a C2 alkylene;
- R1 is an aromatic hydrocarbon of formula (II)
- wherein X is oxygen;
- R′1 to R′4 are each independently selected from the group consisting of hydrogen C1-C3alkyl, aminoalkyl, and aminoaryl;
- R′5 is a C5-C30 alkyl group;
- and
- R2 and R3 and are each independently selected from the group consisting of hydrogen, hydroxyl, halogen, C1-C30 alkyl, alkenyl, aryl, alkylaryl, arylalkyl, aminoalkyl, aminoaryl, (CH2)2COOH, CH2CH(CH3)COOH, and imidazoline.
Dependencies are inferred from the claim text.