METHOD OF PRODUCTION OF HIGHLY-PURIFIED HARD OIL PARAFFINS Russian patent published in 2008 - IPC C10G45/04 

FIELD: chemistry.

SUBSTANCE: invention relates to method for obtaining highly-purified hard oil paraffins by processing oil fractions in hydrogen medium at higher pressure and temperature in presence of system of alumooxide catalysts, which possess functions of changing hydrocarbon composition and purification from element-organic compounds. As oil fraction, oil-free gatch is used; as catalyst of purification from element-organic compounds, preferably is used catalyst obtained by consecutive mixing of aluminium hydroxide of pseudobemite type with inorganic acid until uniform mass with pH 4÷5 is obtained, with salts of nickel and/or cobalt and molybdenum and/or tungstem in amounts necessary for content in end-product of molybdenum and/or tungstem oxide to be 12.0-20.0% weight, nickel and/or cobalt oxide 3.0-5.0% weight, with further evaporation to loss on ignition of not more than 53-56% weight, its formation as extrudates, drying extrudates to loss on ignition of less than 30% weight and their baking to loss on ignition of less than 3% weight.

EFFECT: elaboration of efficient method of production of highly-purified hard oil paraffins.

3 cl, 6 tbl