Process for deasphalting and demetallizing crude petroleum...

Details Process for deasphalting and demetallizing crude petroleum... Process for deasphalting and demetallizing crude petroleum...

C - Chemistry, Metallurgy

10

G

C10G 29/22 (2006.01) C07C 69/96 (2006.01) C10G 21/00 (2006.01) C10G 21/16 (2006.01)

Patent

CA 2043488

CASE 3264/3352 PROCESS FOR DEASPHALTING AND DEMETALLIZING CRUDE PETROLEUM OR ITS FRACTIONS. ABSTRACT A process is described for deasphalting and demetallizing crude petroleum or a fraction thereof containing asphaltenes and metals, in which: - said crude or its fraction is brought into contact with an organic carbonate, the operation being conducted in the homogeneous liquid phase, until a solid residue rich in asphaltenes and asphaltenic metals precipitates; and - said solid residue is separated from the homogeneous liquid phase. After separating the solid the homogeneous liquid phase can be cooled to separate an oil-rich refined liquid phase from an extracted liquid phase rich in organic carbonate. The separation of the extracted and refined liquid phases can also be achieved by adding a liquid solvent more polar than the carbonate, with or without cooling.

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