METHOD FOR HYDROTREATMENT OF RAFFINATES OF OIL FRACTIONS IN PRESENCE OF CATALYST SYSTEM Russian patent published in 2015 - IPC C10G45/08 C10G73/06 B01J23/882 B01J23/883 B01J27/185 B01J27/188 B01J21/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for hydrotreatment of raffinates of oil fractions in the presence of a catalyst system, followed by deparaffination of the product with a solvent. Said catalyst system contains nickel, cobalt, molybdenum, tungsten and aluminium oxides. Hydrotreatment of oil raffinates is carried out by contacting material at the first step with the catalyst, with the following content of components, wt %: nickel oxide - 3.2-5.1; tungsten oxide - 20.0-31.5; phosphorus oxide - 0.5-0.8; aluminium oxide - up to 100; at the second step, contacting products from the first step with the catalyst with the following content of components, wt %: cobalt oxide - 5.0; molybdenum oxide - 19.0; phosphorus oxide - 0.8; aluminium oxide - up to 100. The volume ratio of catalysts at the first and second steps is equal to 1:1-1:11, and operating conditions at the steps are as follows: temperature 300-390°C, pressure 4.0-5.0 MPa, volume rate of feeding material 0.5-2.0 h^-1, circulation rate of hydrogen-containing gas (K_c) 500-1000 nm³/m³ material.

EFFECT: disclosed method improves the quality of deparaffinated base oils on content of sulphur and saturated hydrocarbons.

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