PROCESS OF PRODUCING HIGH-QUALITY LUBE BASE OIL BY USING REFINED OIL FRACTION OF WASTE LUBRICANT
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United States of America Patent
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Issued Date -
Dec 28, 2023
app pub date -
Aug 25, 2023
filing date -
Aug 25, 2023
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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.
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