Process to prepare a lubricating base oil
AssigneeShell Oil Company
InventorGilbert Robert Bernard Germaine
Life of this patent
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Abstract
Process to prepare two or more base oil grades, which base oil grades having different kinematic viscosity's at 100° C. from a waxy paraffinic Fischer-Tropsch product having a content of non-cyclic iso-paraffins of more than 70 wt % by (a) obtaining from the waxy paraffinic Fischer-Tropsch product a distillate fraction having a viscosity corresponding to one of the desired base oil products, (b) performing a catalytic dewaxing step using the distillate fraction obtained in step (a) as feed, (c) separating the lower boiling compounds from the dewaxed product obtained in step (b) in order to obtain the desired base oil, and (d) repeating steps (a)-(c) for each base oil.
Claims18
Process to prepare two or more base oil grades, which base oil grades having different kinematic viscosity's at 100° C. from a waxy paraffinic Fischer-Tropsch product having a content of non-cyclic iso-paraffins of more than 70 wt % by
- (a) obtaining from the waxy paraffinic Fischer-Tropsch product a distillate fraction having a viscosity corresponding to one of the desired base oil products,
- (b) performing a catalytic dewaxing step using the distillate fraction obtained in step (a) as feed, (c) separating the lower boiling compounds from the dewaxed product obtained in step (b) in order to obtain the desired base oil, and (d) repeating steps (a)-(c) for each base oil.
Base oil having a saturates content of above 97 wt %, a kinematic viscosity at 100° C. of between 8 and 12 cSt, a pour point of below −30° C. and a viscosity index of above 120.
Dependencies are inferred from the claim text.