Patent ID: 11873456
Assignee: SK INNOVATION CO., LTD. AND SK ENMOVE CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A process of producing a high-quality lube base oil using a refined oil fraction of waste lubricant, the process comprising:
preparing a refined oil fraction by refining waste lubricant;
pretreating the refined oil fraction; and
blending the pretreated refined oil fraction with unconverted oil before vacuum distillation and catalytic dewaxing of the unconverted oil, or between the vacuum distillation and the catalytic dewaxing,
wherein the vacuum distillation is performed before the catalytic dewaxing, and
wherein the unconverted oil refers to a heavy fraction remaining without being converted to fuel oil through a fuel oil hydrocracking process.