PRODUCTION METHOD OF HIGH-OCTANE GASOLINE FRACTIONS AND AROMATIC HYDROCARBONS Russian patent published in 2008 - IPC C10G35/95 

FIELD: chemistry.

SUBSTANCE: invention refers to production method of high-octane gasoline fractions and/or aromatic hydrocarbons C₆-C₁₀ as follows, hydrocarbon materials is heated, evaporated and overheated to process temperature, thereafter providing its contact at temperature 320-480°C and excess pressure with periodically recyclable catalyst containing zeolite of composition ZSM-5 or ZSM-11. Then it is cooled. Contact products are partially condensed, separated into gaseous and liquid fractions by separation. Liquid products of separation are supplied as power primarily to the first distillation column for separation of hydrocarbon gases and liquid stable fraction. The latter is supplied to the second distillation column for separation of high-octane gasoline fraction, or aromatic hydrocarbon fraction, and heavy charge fraction. Gaseous fraction resulted from separation of contact products is supplied to the first distillation column, specifically to intermediate section between infeed and external reflux inlet. External reflux is liquid distillate of the first distillation column.

EFFECT: reduction of power inputs, i.e. quantities of heat and cooling agent, required for reaction products separation.

5 cl, 2 ex