LIQUID PYROLYSIS PRODUCTS PROCESSING METHOD Russian patent published in 2003 - IPC

FIELD: petroleum processing. SUBSTANCE: processing involves bringing fraction boiling away at 180 C into contact with zeolite-containing aluminosilicate catalyst, after which oligomers are isolated from oligomerizate to yield motor gasoline component. According to invention, liquid pyrolysis products containing components boiling away above 180-200 C are preliminarily isolated and subjected to additional processing. Oligomerizate is separated into fractions boiling below 120 C and above 120 C. The former is transferred into complex rectification column, from the top of which light motor gasoline component, benzene as side stream (over stripping section), and toluene from the bottom are tapped off. Fraction boiling above 120 C is combined with components boiling above 180-200 C and fed into another rectification column, from the top of which heavy motor gasoline component is tapped off. Mixture of upper side stream and bottom residue is used as starting material for production of carbon black. The rest of residue is mixed with solvent to give petroleum-polymer resin, whereas lower side stream is used as starting material for production of plasticizing additives for concrete. EFFECT: intensified process giving components of high-octane gasoline with low benzene level and extended assortment of products. 1 dwg, 1 tbl, 2 ex