Polar solvent - asphaltene dispersant method for upgrading...

C - Chemistry – Metallurgy – 10 – C

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C10C 3/02 (2006.01)

Patent

CA 2512178

A method for reducing the viscosity and toluene equivalence of an oil containing asphaltenes comprises the steps of: a) mixing with the oil, a polar solvent, and an asphaltene dispersant additive wherein the weight ratio of oil : polar solvent is in the range of 10:0.1 to 10:5, the asphaltene dispersant additive is at a treat rate in the range of 0.025 to 5 weight percent based on the weight of the oil, and then, b) removing at least 90 wt% of the polar solvent from the mixture of oil, polar solvent and the asphaltene dispersant additive to provide upgraded oil with reduced viscosity and toluene equivalence.

Méthode de réduction de la viscosité et de la teneur en équivalent toluène de pétrole contenant des asphaltènes qui comprend les étapes suivantes : a) le mélange du pétrole avec un solvant polaire et un dispersant d'asphaltène où le rapport poids du pétrole : poids du solvant est de 10:0,1 à 10:5 et où le dispersant d'asphaltène se trouve dans une proportion de 0,025 à 5 % du poids du pétrole, et b) le retrait d'au moins 90 % en poids du solvant polaire contenu dans le mélange de pétrole, de solvant polaire et de dispersant d'asphaltène afin d'obtenir un pétrole valorisé à viscosité réduite et à faible teneur en équivalent toluène.

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