METHOD OF PETROLEUM PROCESSING Russian patent published in 1997 - IPC

FIELD: petroleum processing. SUBSTANCE: heated petroleum is introduced between concentration and stripping sections of partial topping column with taking off light gasoline fraction from the top. Still residue is heated in furnace and fed into multistage atmosphere column, from which heavy gasoline, kerosene, light and heavy diesel fractions, and bottom mazut are withdrawn. Gasoline top fractions are heated and fed into stabilizer, from the top of which gasoline overhead fraction, from concentration section side cut, and from the bottom stabilized gasoline are taken off. A part of the latter is heated in furnace and introduced into bottom of column. Heavy gasoline fraction from multistage atmosphere column is condensed and condensate is combined with reflux stream fed into top of partial topping column. From concentration section of the latter, side cut is taken off and combined with stable gasoline stream recycling through stabilizer bottom. Mixture is heated in furnace and fed into column in the form of hot jet. EFFECT: enhanced efficiency of process. 1 dwg, 3 tbl