Corrosion inhibitor

Details Corrosion inhibitor Corrosion inhibitor

C - Chemistry, Metallurgy

07

C

C07C 217/08 (2006.01) C09K 8/54 (2006.01) C23F 11/14 (2006.01)

Patent

CA 2761006

The present invention relates to a corrosion inhibitor for use in the oil and gas exploration, recovery and processing industries. In particular, the invention relates to a quaternary ammonium compound suitable for use as such a corrosion inhibitor, to the manufacture of the quaternary ammonium compound, to compositions containing it, and to methods of using it. Quaternary ammonium compounds of the invention have the formula (I) in which R is C1-6 alkyl, C2-6 alkenyl, aryl, aralkyl; X, Y, and Z are each independently hydrogen, or R1CO-, provided that at least one of X, Y and Z is R1CO, where R1 is C5-23 alkyl or alkenyl containing 0, 1, 2 or 3 double bonds; D is C2-6 alkylene; E is C2-4 alkylene; p, q and r are each, independently, integers from 0 to 20, with the proviso that p+q+r is from 3 to 20; and A- is an anion.

L'invention concerne un inhibiteur de corrosion destiné à être utilisé dans l'exploration gazière et pétrolière ainsi que les industries de traitement et de récupération. L'invention porte en particulier sur un composé d'ammonium quaternaire apte à servir d'inhibiteur de corrosion, sur la fabrication dudit composé d'ammonium quaternaire, sur des compositions le contenant et sur des procédés d'utilisation de celui-ci. Les composés d'ammonium quaternaire de l'invention répondent à la formule (I), dans laquelle R représente alkyle C1-6, alcényle C2-6, aryle, aralkyle; X, Y et Z représentent chacun séparément hydrogène, ou R1CO-, à condition qu'au moins un parmi X, Y et Z représente R1CO-, R1 représentant alcényle ou alkyle C5-23 contenant 0, 1,02 ou 3 liaisons doubles; D représente alkylène C2-6; E représente alkylène C24; p, q et r valent chacun indépendamment des entiers de 0 à 20, à condition que p+q+r vale 3 à 20; et A- représente un anion.

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