METHOD OF HEAVY AROMATIC HYDROCARBON PROCESSING Russian patent published in 2002 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to a method of conversion of heavy aromatic hydrocarbon to more light compounds, for example, benzene by contact of C₉-fraction + aromatic hydrocarbons and toluene over the first catalyst containing zeolite with permeability index in the range from 0.5 to 3 and a hydrogenization component and then over the second catalytical composition containing zeolite with mean pores size having permeability index in the range from 3 to 12, in the ratio of silicon dioxide to aluminum oxide at least 5. Method prevents formation of in common boiling compounds and decreases their amount. EFFECT: increased yield, production of benzene of high purity degree. 7 cl, 1 dwg, 1 tbl, 1 ex