METHOD FOR PREPARING SINGLE GRADE LUBE BASE OIL

摘要

The present invention provides a method for producing single grade lubricating oil in large quantity. The method of the present invention comprises the following steps: (a) obtaining deasphalted oil (DAO) in which asphalt is removed by supplying a mixture (VR/AR) of vacuum residue (VR) and atmospheric residue (AR) to a solvent deasphalting (SDA) device; (b) hydrotreating (HDT) the deasphalted oil (DAO) in the presence of a hydrogenation catalyst; (c) obtaining a light stream and a heavy stream by introducing oil hydrotreated (HDT) in the step (b) to a separation part (Fs); and (d) producing a main product by mixing the light stream and the heavy stream. According to the present invention, the method for producing single grade lubricating oil in large quantity enables the production of lubricating oil to be greatly increased by eliminating limits of material properties.