LUBRICATING OIL COMPOSITION AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2013 - IPC C10M111/04 C10M177/00 C10G2/00 C10G45/58 

FIELD: chemistry.

SUBSTANCE: invention relates to a lubricant base oil composition containing: (a) mineral oil-derived base oil having content of saturated compounds higher than 90 wt %, sulphur content below 0.03 wt % and viscosity index between 80 and 150, and (b) a paraffin base oil component having viscosity at 100°C from 7 to 30 cSt (from 7 to 30 mm²/s), where component (b) is an isomerised residual product obtained during Fischer-Tropsch synthesis and has percentage ratio of secondary methylene carbon atoms, lying four or more carbon atoms from the terminal group and the branching, to isopropyl carbon atoms, found using a ¹³C-NMR technique, less than 8.2; wherein the base oil mixture has clouding point below 0°C and kinematic viscosity at 100°C higher than 12.0 cSt. The invention also relates to a method of producing a lubricating base oil mixture.

EFFECT: lubricating oil mixture has high viscosity index and high content of saturated compounds with a low pour point.

9 cl, 1 dwg, 5 tbl, 3 ex