FIELD: chemistry.
SUBSTANCE: invention refers to method of base oil processing with viscosity index within 80 to 140, made of charge stock in the form of vacuum distillate or asphalt-free oil and resulted from hydrogen contact of charge stock with catalyst containing group VIB metal and group VIII base metal on amorphous carrier, followed by dewaxing cycle. Method of base oil processing with viscosity index within 80 to 140 is made of charge stock in the form of vacuum distillate or asphalt-free oil by the following stages: caused hydrogen contact of charge stock with sulphided unfluorinated hydrosulphur removal catalyst containing nickel and tungsten on carrier based on acid amorphous silicon dioxide - aluminium oxide. Then pour point for product of stage (a) is lowered, and base oil is produced. Hydrosulphur removal catalyst is produced by method implying that nickel and tungsten are applied on the carrier based on acid amorphous silicon dioxide - aluminium oxide consequently from chelator impregnation.
EFFECT: developed processing method of base oil with viscosity index.
16 cl, 7 dwg, 3 tbl, 6 ex
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