Bis-quaternary ammonium salt corrosion inhibitors

Details Bis-quaternary ammonium salt corrosion inhibitors Bis-quaternary ammonium salt corrosion inhibitors

A - Human Necessities

61

K

A61K 31/74 (2006.01)

Patent

CA 2573758

Bis-quaternary ammonium salts of formula (I), wherein Y is a group of formula NR11R12 +X- or NR7; n is 0 or 1; p is 1 or 2; r and q are independently 2, 3 or 4; X is an anionic counterion and R1R2R3N- and R4R5R6N- are independently selected from groups of formula-N(R13)2R8, N(R14)3,-N(R13)3, - N(R13)2(CH2)qOC(O)R9, and formula (a), wherein R7, R11 and R12 are independently selected from C1-C18 alkyl; R8,R9, R10 and R15 are independently selected from C8-C18 alkyl and C8-C18 alkenyl; R13 is C1-C4 alkyl; R14 is C2- C4 hydroxyalkyl; and R11 is selected from C2-C4 hydroxyalkyl, C2-C4aminoalkyl and groups of formula -(CH2)rNHC(O)R15 are effective inhibitors of corrosion and biofouling of metallic surfaces in contact with gas- and oil-field fluids.

L~invention décrit des sels d~ammonium bis-quaternaire de formule (I), où Y est un groupe de formule NR11R12 +X- ou NR7; n vaut 0 ou 1; p vaut 1 ou 2; r et q sont indépendamment 2, 3 ou 4; X est un contre-ion anionique et R1R2R3N- et R4R5R6N- sont indépendamment choisis parmi des groupes de formule -N(R13)2R8, -N (R14)3,-N(R13)3, -N(R13)2(CH2)qOC(O)R9, et de formule (a), où R7, R11 et R12 sont indépendamment choisis parmi un alkyle en C1 à C18; R8,R9, R10 et R15 sont indépendamment choisis parmi un alkyle en C8 à C18 et un alcényle en C8 à C18; R13 est un alkyle en C1 à C4; R14 est un hydroxyalkyle en C2 à C4; et R11 est choisi parmi un hydroxyalkyle en C2 à C4, un aminoalkyle en C2 à C4 et des groupes de formule -(CH2)rNHC(O)R15qui sont des inhibiteurs efficaces de la corrosion et du bio-encrassement de surfaces métalliques au contact de fluides dans les champs de gaz et les champs de pétrole.

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