Chemical demulsifier for desalting heavy crude

Details Chemical demulsifier for desalting heavy crude Chemical demulsifier for desalting heavy crude

C - Chemistry, Metallurgy

10

G

C10G 33/04 (2006.01)

Patent

CA 2361740

The invention is directed towards a process for desalting crude oil that requires less wash water than conventional desalting methods. In the practice of the invention, a chemical demulsifier formulation comprising an emulsion- breaking chemical and a solvent is added to the crude oil. Wash water may be added to the crude oil until the volume of water in the oil ranges from about 0.5 to about 8 vol. %. Subsequently, the mixture of crude oil, wash water when present, and chemical demulsifier formulation may be subjected to electrostatic desalting.

L'invention se rapporte à un procédé de dessalage du pétrole brut qui nécessite moins d'eau de lavage que les procédés de dessalage traditionnels. Selon l'invention, on ajoute au pétrole brut une formulation de désémulsionneur chimique comportant un agent chimique de rupture d'émulsion et un solvant. On peut ajouter de l'eau de lavage au pétrole brut jusqu'à ce que le volume d'eau dans le pétrole atteigne une valeur comprise entre 0,5 % environ à 8 % environ en volume. Il est ensuite possible de soumettre le mélange de pétrole brut, d'eau de lavage le cas échéant, et de la formulation de désémulsionneur chimique à un dessalage électrostatique.

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