METHOD OF TREATING HYDROCARBON FEEDSTOCK CONTAINING HYDROGEN AND HYDROCARBONS C-C Russian patent published in 2020 - IPC C10G7/00 C10G70/06 C01B3/00 C10G49/22 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to a method of treating hydrocarbon feedstock containing hydrogen and hydrocarbons, including hydrocarbons C₁-C₄, in which: a) hydrocarbon feedstock is divided into gas phase (6), containing mainly hydrogen, and liquid phase (4) containing hydrocarbons; b) performing the first step of re-contacting first the gaseous phase obtained at step a) , with recirculating gas stream (23), obtained at step e) to extract gas (10), which is in contact with liquid phase (4) obtained at step (a), at temperature less than or equal to 55 °C; c) dividing flow from re-contact at step b) into gas phase (15), enriched with hydrogen, and liquid phase (16); d) performing a second re-contacting step of liquid phase (16) leaving step (c) with gas phase (21) coming from step (g) at a temperature lower than or equal to 55 °C; e) dividing the flow from re-contact at step d) into gas phase (23), which is returned to step b), and liquid phase (24) containing hydrocarbons; and f) fractionating liquid phase (24) from step e), in fractionation column (25) to separate gaseous head fraction (27) and liquid bottom fraction (26) containing hydrocarbons with carbon number greater than 4; g) condensing gaseous head fraction (27) from step f) and separating liquid phase (30) containing mainly hydrocarbons C₃ and C₄, and gas phase (21), which is returned to step d).

EFFECT: technical result is maximum increase in extraction of hydrogen and hydrocarbons C₃ and C₄.

8 cl, 2 ex, 3 tbl, 1 dwg