METHOD OF ALKYLATING AROMATIC HYDROCARBONS IN PHASE Russian patent published in 2011 - IPC C07C2/66 C10G50/00 C10G35/95 C10L1/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining a product with boiling range corresponding to a gasoline fraction from a stream of material from a mixture of light olefins containing ethylene and propylene, and a stream of liquid aromatic material containing benzene, involving: extraction of light olefins from a stream of gaseous olefins, containing ethylene and propylene, through counterflow dissolving at temperature of up to 120°C and excess pressure of up to 3500 kPa, in a stream of light aromatic hydrocarbons containing 5-60 wt % benzene to obtain a stream of extract containing extracted olefins in aromatic hydrocarbons, and a stream containing non-sorbed olefins; alkylation of aromatic hydrocarbons contained in the stream of extract which is extracted with olefins dissolved in the stream of aromatic hydrocarbons on a fixed bed solid alkylation catalyst based on molecular sieves, containing MWW zeolite, through reaction in liquid phase at temperature not higher than 250°C, weight ratio of aromatic hydrocarbons: olefins between 0.5:1 and 5:1 and space velocity of olefins between 0.5 and 5.0 to form a product with boiling range corresponding to the gasoline fraction which contains alkylaromatic hydrocarbons, including alkylbenzenes, feeding the stream containing non-sorbed olefins to the vapour-phase alkylation step on which olefins contained in the stream are brought into contact with an additional stream of light aromatic hydrocarbons containing 5-60 wt % benzene for alkylation of aromatic hydrocarbons in that stream with non-sorbed olefins in a catalytic reaction in vapour phase on a fixed catalyst bed which contains a ZSM-5 zeolite catalyst at temperature 200-325°C to obtain alkylated aromatic hydrocarbons, including alkylbenzenes, and fractionation of products from the liquid-phase alkylation step and vapour-phase alkylation step in a common distillation column to obtain a product with boiling range corresponding to the gasoline fraction containing alkylaromatic compounds.

EFFECT: present method enables to use light olefins - petroleum refining products coming from a catalytic cracking apparatus in a fluidised bed, for alkylation of benzene - a petroleum refining product, to obtain products with boiling range corresponding to the gasoline fraction.

9 cl, 5 tbl, 2 dwg