Method and facility for refining oil

Details Method and facility for refining oil Method and facility for refining oil

C - Chemistry, Metallurgy

10

G

C10G 67/02 (2006.01) C10G 65/04 (2006.01) C10G 65/14 (2006.01)

Patent

CA 2479008

The present invention is related to a method of subjecting a feed oil to a refining process. This method includes a fractional distillation step 1 in which a feed oil is separated into a distillate oil M1 and a bottom oil M2 by a distillation process, a separation step in which the bottom oil is separated into a bottom light oil and a residue, and a hydrorefining step 3 in which the obtained distillate oil M1 and the bottom oil M2 are subjected to hydrorefining in the presence of hydrogen and a catalyst. In the hydrorefining step 3, the bottom light oil (deasphalted oil M3) is passed through a first catalyst layer 12 of a hydrorefining unit providing a plurality of catalyst layers 12, 13, and 13 filled with a hydrorefining catalyst, and a mixed oil comprising the distillate oil M1 and the bottom light oil (deasphalted oil M3) is passed through a downstream catalyst layer 13 and subject to a hydrogenation process.

L'invention concerne un procédé de raffinage d'huile brute. Ce procédé consiste à séparer par distillation l'huile brute en huile distillée (M1) et huile résiduelle (M2) au cours d'une opération de distillation/séparation (opération 1) ; et à hydrogéner et raffiner l'huile distillée (M1) et l'huile légère obtenue de l'huile résiduelle (M2), en présence d'hydrogène et de catalyseurs, au cours d'une opération d'hydrogénation/raffinage (opération 3). Dans l'opération (3) d'hydrogénation/raffinage, le passage de l'huile légère (huile de désasphaltage M3) par une première couche catalysante (couche catalysante de démétallisation 12) permet de l'hydrogéner. Le passage d'un mélange constitué de l'huile légère ainsi hydrogénée (huile de désasphaltage M3) et de l'huile distillée M1 par une deuxième couche catalysante (couche catalysante de désulfuration 13) permet de l'hydrogéner.

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