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.

IPC Classes  ?

• C10G 69/02 - Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only
• C10G 61/04 - Treatment of naphtha by at least one reforming process and at least one process of refining in the absence of hydrogen plural serial stages only the refining step being an extraction
• C10M 101/02 - Petroleum fractions
• C10M 175/00 - Working-up used lubricants to recover useful products
• C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
• C10N 30/02 - Pour-pointViscosity index
• C10N 30/20 - Colour, e.g. dyes
• C10N 70/00 - Special methods of preparation