PROCESS FOR PRODUCING OIL FRACTIONS Russian patent published in 1996 - IPC

FIELD: preliminary distillation of oil. SUBSTANCE: oil distillation is carried out in two rectification columns by taking gasoline from the first column top. The residue of the first column is distilled under vacuum in the second column to give light fractions containing side-out distillates, and black oil is taken from the column bottom as distillation residue. In this case, all diesel fuel is separated to residual amount, and black oil is separated from all light fractions. The residue is separated under vacuum in the second column. EFFECT: more efficient production process. 2 dwg, 3 tbl