FIELD: petroleum processing. SUBSTANCE: light hydrocarbon fraction and associated petroleum gases are processed into high-aromatization liquid hydrocarbons via evaporating and heating raw material in furnace; bringing it into contact with zeolite-containing Pentasil-type catalyst contained in a system of in-series connected catalyst steps - reactors with interstep material heating; separating reformate into desired products; and regenerating catalyst by burning off coke. Method is distinguished by that raw material heated to 420-490 C is first introduced into reactors with catalyst exhausted under propane-butane fraction conversion conditions, in which reactors C5- hydrocarbons contained in raw material are converted, after which total stream is passed through other in-series arranged reactors with interstep heating furnaces. The first of those reactors contains just regenerated catalyst and all subsequent ones contain catalyst with gradually increasing degree of exhaustion. In the latter reactors, propane and butane, also contained in hydrocarbon stream, are converted into aromatic hydrocarbons at 500-590 C. EFFECT: enhanced efficiency of processing long hydrocarbon fraction containing considerable amounts of C5-hydrocarbons. 3 dwg
