Methods and compositions for inhibiting corrosion

Details Methods and compositions for inhibiting corrosion Methods and compositions for inhibiting corrosion

C - Chemistry, Metallurgy

10

G

C10G 9/16 (2006.01) B01F 17/16 (2006.01) B01F 17/18 (2006.01) C10G 9/12 (2006.01) C10G 31/08 (2006.01) C10G 75/02 (2006.01)

Patent

CA 2336157

Disclosed are methods and compositions for inhibiting corrosion in the overhead of a crude unit distillation tower by washing the crude oil with water containing a hydrophilic, polymeric, nitrogenous base, a di- or multivalent metallic base, or a combination of a multi-polyether-headed surfactant and a monovalent metallic base. In another embodiment, a hydrophobic, nitrogenous base is added directly to the crude oil then washed with water.

La présente invention concerne des traitements et des compositions permettant de lutter contre la corrosion dans la tête de colonne d'une tour de distillation de pétrole. En l'occurrence, on lave le pétrole brut avec de l'eau contenant une base azotée hydrophile polymère, ou une base métallique divalente ou multivalente, ou encore une combinaison d'un tensioactif à plusieurs têtes polyéther et d'une base métallique monovalente. Selon une autre réalisation, on ajoute directement au pétrole brut une base azotée hydrophobe puis on l'élimine avec de l'eau.

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