Lube base oil manufacturing process utilizing refined oil fraction of waste lubricant, and lube base oil manufactured thereby
AssigneesSK Innovation Co., Ltd., SK Enmove Co., Ltd.
InventorsYoung Wook Jeon, Jun Soo Park, Eun Kyoung Kim, Kyung Seok Noh
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Abstract
A method of recycling waste lubricant. The method includes providing a waste lubricant-derived oil fraction, pretreating the waste lubricant-derived oil fraction, and hydrocracking the pretreated waste lubricant-derived oil fraction. The method has economic advantages in that waste lubricant can be recycled into fuel oil and high-grade lube base oil with a relatively high yield compared to a lube base oil manufacturing process utilizing only unconverted oil as a feedstock.
Claims16
A lube base oil manufacturing process utilizing refined oil regenerated from waste lubricant, the process comprising:
- providing a refined oil fraction from waste lubricant;
- pretreating the refined oil fraction, wherein the pretreated refined oil fraction has a nitrogen content of less than 30 ppm;
- and
- blending the pretreated refined oil fraction with unconverted oil before vacuum distillation and catalytic dewaxing of the unconverted oil, after the vacuum distillation and catalytic dewaxing of the unconverted oil, or between the vacuum distillation and the catalytic dewaxing,
- wherein the refined oil fraction has a boiling point of 300° C. to 550° C.
A lube base oil manufacturing process utilizing refined oil regenerated from waste lubricant, the process comprising:
- subjecting a waste lubricant to a centrifugation operation for separating and removing solid impurities present in the waste lubricant and producing a purified waste lubricant;
- performing an atmospheric distillation on the purified waste lubricant for separating the purified waste lubricant in a plurality of fractions according to their boiling points;
- and
- performing a first vacuum distillation to a fraction obtained from the atmospheric distillation operation having a boiling point of about 150° C. or higher;
- collecting a refined oil fraction having a boiling point of 300° C. to 550° C.;
- pretreating the refined oil fraction, wherein the pretreated refined oil fraction has a nitrogen content of less than 30 ppm;
- blending the pretreated refined oil fraction with unconverted oil to form a mixture;
- subjecting the mixture to vacuum distillation and catalytic dewaxing to produce lube base oils.
A lube base oil manufacturing process utilizing refined oil regenerated from waste lubricant, the process comprising:
- providing a refined oil fraction from waste lubricant;
- pretreating the refined oil fraction, wherein the pretreated refined oil fraction has a nitrogen content of less than 30 ppm;
- and
- blending the pretreated refined oil fraction with unconverted oil before vacuum distillation and catalytic dewaxing of the unconverted oil, after the vacuum distillation and catalytic dewaxing of the unconverted oil, or between the vacuum distillation and the catalytic dewaxing,
- wherein an amount of the refined oil fraction blended with the unconverted oil is 1% or more and 10% or less by volume of the mixture in which the refined oil fraction and the unconverted oil are blended.
Dependencies are inferred from the claim text.