Hydroconversion process for making lubricating oil basestocks

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 67/04 (2006.01) C10G 1/04 (2006.01) C10G 21/00 (2006.01) C10G 65/04 (2006.01) C10G 65/12 (2006.01)

Patent

CA 2319035

A process for producing a lubricating oil basestock having at least 90 wt % saturates and a VI of at least 105 by solvent extracting a feedstock in unit (20) to produce a raffinate, solvent dewaxing the raffinate, selectively hydroconverting the solvent dewaxed raffinate in a two step hydroconversion zone which comprises a first hydroconversion unit (42) and to a second hydroconversion unit (52) followed by a hydrofinishing zone in hydrofinishing unit (60) and a dewaxing zone in unit (74).

L'invention concerne un procédé qui permet de produire une huile de base pour huiles lubrifiantes, renfermant au moins 90 % en poids de composés saturés et ayant un indice de viscosité d'au moins 105. Selon le procédé, on extrait par solvant une charge d'alimentation dans l'unité (20), de façon à produire un raffinat; on déparaffine par solvant le raffinat; et on effectue l'hydroconversion sélective du raffinat déparaffiné dans une zone d'hydroconversion en deux étapes, qui comprend une première unité d'hydroconversion (42) et une seconde unité d'hydroconversion (52), suivies d'une zone d'hydrofinissage située dans une unité d'hydrofinissage (60) et d'une zone de déparaffinage située dans l'unité (74).

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