METHOD OF PRODUCING BASE OIL COMPONENTS Russian patent published in 2019 - IPC C10G67/04 C10G65/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing high-index components of base oils corresponding to group III and III+ by API, which includes obtaining base oils with viscosity index from 125 to 140. Oil feedstock is subjected to catalytic hydrocracking of petroleum feedstock to obtain non-converted hydrocracker residue, from which by means of vacuum distillation (fractionation) the target fractions are obtained: IB-410 °C, 410–440 °C, 440–480 °C, 480–520 °C, 520 °C – FB and further, after mixing of fractions with paraffin slack wax obtained during solvent dewaxing from raffinates of selective purification of vacuum runs of the primary oil refining process, hydrocracking residue is subjected to successive hydrotreating, catalytic dewaxing (hydroisomerisation), hydrofinishing, carried out at pressure less than 6.0 MPa, rectification and vacuum distillation, with separation of target fraction 370 °C – FB.

EFFECT: obtaining a high-index component of base oils with a viscosity index of 120 to 140 points, sulfur content of less than 10 ppm and content of saturated hydrocarbons of not less than 90 wt%, which enables to vary the range in production of commercial oils.

1 cl, 27 tbl