US 12,421,462 B2
Lube base oil manufacturing process utilizing refined oil fraction of waste lubricant, and lube base oil manufactured thereby
Young Wook Jeon, Daejeon (KR); Jun Soo Park, Daejeon (KR); Eun Kyoung Kim, Daejeon (KR); and Kyung Seok Noh, Daejeon (KR)
Assigned to SK INNOVATION CO., LTD., Seoul (KR); and SK ENMOVE CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR); and SK ENMOVE CO., LTD., Seoul (KR)
Filed on Mar. 21, 2024, as Appl. No. 18/611,720.
Claims priority of application No. 10-2023-0093261 (KR), filed on Jul. 18, 2023.
Prior Publication US 2025/0026992 A1, Jan. 23, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 53/04 (2006.01); C10M 101/02 (2006.01); C10M 175/00 (2006.01); C10M 177/00 (2006.01); C10N 30/00 (2006.01); C10N 30/02 (2006.01); C10N 30/20 (2006.01); C10N 70/00 (2006.01)
CPC C10G 53/04 (2013.01) [C10M 101/02 (2013.01); C10M 175/0033 (2013.01); C10M 175/005 (2013.01); C10M 175/0058 (2013.01); C10M 177/00 (2013.01); C10G 2300/1007 (2013.01); C10M 2203/1006 (2013.01); C10N 2030/02 (2013.01); C10N 2030/20 (2013.01); C10N 2030/41 (2020.05); C10N 2030/43 (2020.05); C10N 2070/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. 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.