FIELD: petroleum processing. SUBSTANCE: distillation is carried out in two vacuum columns having different residuum pressure values. In feeding zone of the first vacuum rectification column, residuum pressure is maintained higher than that in the second column serving for separating distillation residuum from the first column. Working fluid from separator is withdrawn directly to the pump inlet to be fed into the nozzle of jet apparatus of evacuation unit. Gas-vapor mixture from rectification column is pumped off by liquid-gas jet apparatus, to the nozzle of which, working fluid is fed by circulation pump from additional separator which receives gas-liquid mixture from liquid-gas jet apparatus. In the residuum separation column, vapor condensation is accomplished by introducing liquid fraction, whereas condensate is tapped as side stream. EFFECT: increased percentage of processed initial material and improved quality of distillate and goudron. 11 cl, 2 dwg depthe
