Method of producing concentrate of aromatic hydrocarbon from liquid hydrocarbon fractions, and installation for implementing same

The invention relates to the field of petrochemistry and petroleum refining, and more-specifically to methods and devices for producing a concentrate of aromatic hydrocarbons from liquid hydrocarbon fractions, which involve feeding initial components into a mixer, heating said components, feeding same to a reactor in which the heated components are converted into aromatic hydrocarbons in the presence of a catalyst, separating same into liquid and gas phases, feeding the gas phase into the mixer, and feeding the liquid phase into a rectification column, from which an aromatic hydrocarbon concentrate is collected, and can be used in petroleum refining and in petrochemistry for producing a concentrate aromatic hydrocarbons. According to the invention, methanol is additionally fed into the mixer. Hydrocarbon components which remain in the rectification column following collection are at least partially fed into the mixer. The liquid phase is additionally separated into liquid hydrocarbons and water, the liquid hydrocarbons are fed into the rectification column, and the water is removed. The composition of the liquid aromatic hydrocarbons, which are fed into the rectification column, is measured. In accordance with the results of the measurements, the flow rate of the initial components fed into the mixer is adjusted, and/or the temperature of the rectification column is adjusted. A proposed installation carries out the said method. The achieved technical result consists in increasing the efficiency of producing concentrates of aromatic hydrocarbons, and in increasing the content of alkylbenzenes, particularly xylenes.