▎ 摘　　要

NOVELTY - Lubricating oil comprises 55-75 wt.% water, 15-35 wt.% sodium dodecylbenzenesulfonate, 2-10 wt.% lipase and 0.1-0.5 wt.% graphene. USE - Lubricating oil. ADVANTAGE - Lubricating oil can replace conventional oil refining and petrochemical products as machinery and equipment oil, saves petroleum resources and reduces the dependency on the preparation of lubricating oil non-renewable energy and environmental pollution at the same time, the friction between the two graphene produced by the body significantly reduces the coefficient of friction which reduces the friction between machine part and thus effectively protects the machine equipments, reduces the gasoline or diesel for electricity consumption, has good economic benefit and eco-friendly character. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for a method for lubricating oil preparation, which involves: (1) mixing water, sodium dodecylbenzenesulfonate, lipase and graphene; stirring uniformly for 5 to 10 minutes to obtain a uniform mixture; and filtering the mixture in a fine filter at a flow rate of 350-360 liter/hour; and (2) device for lubricating oil preparation which comprises fine filter which comprises circulation pump (11) and connecting pipeline (15) forming a circulation filter (12) and centrifugal filtering device and filtering membrane type filter (16). The centrifugal filtering device comprises cylinder body (13) and motor (19), which is set with internal tube and U-type stirring blade, the U-type stirring piece (14) is connected by rotate shaft to the motor. The filtering membrane type filter comprises shell, where the internal place of the shell of filter membrane is cylindrical main body. The upper cover plate is formed with first multi-way holes and the lower cover plate is formed with three multi-way hole between the second cylindrical main body and in between the cylindrical shell main body. The shell is nested with number of circulars and is set with zigzag pleats of the filter core. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of device for lubricating oil preparation Circulation pump (11) Circulation filter (12) Cylinder body (13) Stirring piece (14) Connecting pipeline (15) Filtering membrane type filter (16) Motor (19) Circulation pipe (20)