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US 12,227,705 B2Granted
Process of producing high-quality lube base oil by using refined oil fraction of waste lubricant
AssigneesSK Innovation Co., Ltd., SK Enmove Co., Ltd.
InventorsYoung Wook Jeon, Jin Hee Ok, Kyung Seok Noh, Do Woan Kim
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Abstract
Proposed is a process of producing a high-quality lube base oil using a refined oil fraction obtained from waste lubricant as a feedstock. The process includes purifying waste lubricant to obtain a refined oil fraction, pretreating the refined oil fraction, and blending the pretreated refined oil fraction with unconverted oil (UCO), before or after vacuum distillation and catalytic dewaxing of the unconverted oil, or between the vacuum distillation and the catalytic dewaxing of the unconverted oil.
Claims14
A recycled oil product comprising:
- a lube base oil prepared from a waste lubricant, wherein the recycled oil product has
- a specific gravity ranging from 0.8 to 0.9,
- a kinematic viscosity at 100° C. ranging from 3 to 8 cSt,
- a viscosity index greater than or equal to 110,
- a pour point ranging from −39° C. to −12° C., and
- an aromatic content ranging from less than 1% to greater than 0%,
- wherein the recycled oil product exhibits a UV 260-350 nm absorbance of 2.5 or less and a UV 325 nm absorbance of 0.7 or less, as measured by ASTM D 2008.
4 more elements
Dependencies are inferred from the claim text.