METHOD OF PRODUCING HIGH-OCTANE GASOLINE OR HIGH-OCTANE GASOLINE AND AROMATIC HYDROCARBONS Russian patent published in 1999 - IPC

FIELD: petroleum processing and petrochemical industry. SUBSTANCE: hydrocarbon material containing aliphatic hydrocarbons is brought into contact with zeolite catalyst at elevated temperature and pressure using two reaction zones, in one of them crude gasoline fraction and in the other C₂-C₄-hydrocarbons being converted into C₁-C₁₂-hydrocarbon mixture containing desired product. The two catalytic zones operate simultaneously in two different modes with the same duration, which are alternated in such a way as to ensure continuous conversion of crude gasoline. Mode I: conversion of crude gasoline. Mode II - continuous sequence of following processes: regeneration of catalyst after conversion of crude gasoline, conversion of C₂-C₄-hydrocarbons, and regeneration of catalyst after conversion of C₂-C₄-hydrocarbons. In a preferred embodiment of invention, desired product is isolated from mixture of products formed in both reaction zones. At least a part of propane-butane fraction formed from crude gasoline can be used as C₂-C₄-hydrocarbons. EFFECT: increased yield of liquid products. 23 cl, 1 dwg, 3 tbl