METHOD OF PARAFFIN OIL PREPARATION Russian patent published in 2015 - IPC F17D1/16 

FIELD: oil and gas industry.

SUBSTANCE: method of thermal oil dewaxing is suggested, it includes the paraffin oil heating in waste heat exchanger, fractionation together with thermolysis vapours supplied as vapour reflux, and circulating part of thermolysis residues with creation of fractionation vapours and mixture of heavy gas oil, and residual fraction. The latter is heated in the furnace and is subjected to thermolysis and separation with production of vapours and thermolysis residues, separated to the circulating part and balance part. The fractionation vapours are mixed with stabilisation gas, cooled in the waste hear exchanger, and separated to separation gas used for own needs as fuel, and to wide distilled fraction mixed with the balance part of the thermolysis residues, and are stabilised with separation of the stabilisation gas and prepared oil.

EFFECT: simplified method and reduced content by weight of wax in oil, decreasing of its viscosity and pour point.

5 cl, 1 dwg