Process to produce lube oil basestock by low severity hydrotreating of used industrial circulating oils
AssigneeExxon Research & Engineering Co.
InventorKevin D. Butler
Life of this patent
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Abstract
Lubricating basestock oil suitable for use as such or as blending oil is obtained by the low severity hydrotreatment of industrial circulating oils of the type employed in low severity lubricating applications, and which have been mildly degraded and are no longer suitable for use for their intended purpose.
Claims5
A process for rerefining used industrial hydrocarbon lubricating oils employed in low severity lubricating applications consisting essentially of collecting said oil separately from other used lubricating oils and catalytically hydrotreating said segregated industrial lube oil at a temperature in the range 200.degree. to 325.degree. C., a pressure in the range 1.4 to 5.5 MPa, a space velocity in the range 0.25 to 5.0 LHSV and a hydrogen treat gas rate of 45 to 180 Sm.sup.3 /m.sup.3.
Dependencies are inferred from the claim text.