US 12,227,705 B2
Process of producing high-quality lube base oil by using refined oil fraction of waste lubricant
Young Wook Jeon, Daejeon (KR); Jin Hee Ok, Daejeon (KR); Kyung Seok Noh, Daejeon (KR); and Do Woan Kim, 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 Aug. 25, 2023, as Appl. No. 18/456,321.
Application 18/456,321 is a continuation of application No. 17/890,252, filed on Aug. 17, 2022, granted, now 11,873,456.
Claims priority of application No. 10-2021-0108145 (KR), filed on Aug. 17, 2021.
Prior Publication US 2023/0416621 A1, Dec. 28, 2023
Int. Cl. C10G 69/02 (2006.01); C10G 61/04 (2006.01); C10M 101/02 (2006.01); C10M 175/00 (2006.01); C10N 30/00 (2006.01); C10N 30/02 (2006.01); C10N 30/20 (2006.01); C10N 70/00 (2006.01)
CPC C10G 69/02 (2013.01) [C10G 61/04 (2013.01); C10M 101/02 (2013.01); C10M 175/0016 (2013.01); C10M 175/0033 (2013.01); C10M 175/005 (2013.01); C10G 2300/1007 (2013.01); C10G 2400/10 (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)] 14 Claims
OG exemplary drawing
 
1. A recycled oil product comprising:
a lube base oil prepared from a waste lubricant, wherein the recycled oil product has
a specific gravity ranging from 0.8 to 0.9,
a kinematic viscosity at 100° C. ranging from 3 to 8 cSt,
a viscosity index greater than or equal to 110,
a pour point ranging from −39° C. to −12° C., and
an aromatic content ranging from less than 1% to greater than 0%,
wherein the recycled oil product exhibits a UV 260-350 nm absorbance of 2.5 or less and a UV 325 nm absorbance of 0.7 or less, as measured by ASTM D 2008.