Raffinate hydroconversion process

Details Raffinate hydroconversion process Raffinate hydroconversion process

C - Chemistry, Metallurgy

10

G

C10G 71/00 (2006.01) C10G 21/00 (2006.01) C10G 47/02 (2006.01) C10G 65/04 (2006.01) C10G 65/12 (2006.01) C10G 67/04 (2006.01) C10G 73/12 (2006.01)

Patent

CA 2319145

A process for producing a high VI/low volatility lubricating oil basestock. The process comprises subjecting the raffinate from a solvent extraction step (40) to a two-step, single-stage hydroconversion process wherein the first step involves severe hydroconversion of the raffinate (42) followed by a cold hydrofinishing step (50). The effluent from the cold hydrofinishing step (52) in then catalytically dewaxed or in the alternative, solvent dewaxed followed by catalytic dewaxing (60).

L'invention concerne un procédé de fabrication permettant d'obtenir une huile lubrifiante de base à fort indice de viscosité VI/faible volatilité. Le procédé consiste à soumettre un raffinat, obtenu en extraction par solvant (40), à une hydroconversion sous phase unique, selon les deux étapes suivantes : premièrement, hydroconversion forte du raffinat (42) et, deuxièmement, hydrofinissage à froid (50). L'effluent de la deuxième étape (52) est ensuite déparaffiné sous catalyse, une variante consistant à opérer l'opération par solvant puis sous catalyse (60).

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