FIELD: oil-and-gas industry.
SUBSTANCE: proposed method comprises rectification of viscosity breaking products in the main rectifier column, column distillation residue being cooled and fed to evaporator for desorption. Pressure of 5.1÷10.5 atm is maintained in evaporator column along with feed of desorption agent, i.e. water steam, in amount of 0.1-0.8 wt % of stock volume fed to said column. Vapours from evaporator column top are fed to the main rectifier column under tray for discharge of gas-oil fraction to stripping Scented diesel fraction from vacuum gas-oil cracking is fed into viscosity breaking kiln coil as a turbulence promoter.
EFFECT: residual hydrogen sulphide content not over 2 ppm.
4 cl, 2 dwg, 1 tbl
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