Title:
SOLVENT EXTRACTION FOR REREFINING USED LUBRICANT OIL
Document Type and Number:
Japanese Patent JPS57135898
Kind Code:
A
Abstract:
In accordance with the present invention, a process is provided for removing impurities from heavy and light lube oil fractions that have been obtained from waste lubricating oil. The impurities in the light lube oil fraction are removed utilizing tetrahydrofurfuryl alcohol in an extraction column (10). An oil-rich raffinate has the solvent removed therefrom by steam distillation and stripping at reduced pressure in a distillation tower (20). The heavy lube oil fraction is purified in a manner similar to the purification of the light lube oil fraction. The finished heavy and light lube oil may then be subjected to further treatment, such as polishing steps or additives may be blended into the lube oil product depending on the desired use.
Inventors:
REAADO SHII FURETSUCHIYAA
RICHIYAADO ETSUCHI OBURASUNII
RICHIYAADO ETSUCHI OBURASUNII
Application Number:
JP17128381A
Publication Date:
August 21, 1982
Filing Date:
October 26, 1981
Export Citation:
Assignee:
DERUTA CENTRAL RIFUAININGU INC
International Classes:
C10G21/16; C10M175/00; C10N40/25; (IPC1-7): C10M11/00