METHOD FOR SEPARATING C5-C8 HYDROCARBONS AND ACID GASES FROM A FLUID MEDIUM STREAM Russian patent published in 2020 - IPC B01D53/14 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to a method of extracting hydrocarbons with 5–8 carbon atoms and acid gases from a fluid medium stream, wherein a) the fluid medium flow in the absorption zone is brought into contact with the absorbent containing at least one amine, wherein the acid gas-free fluid medium flow and the adsorbent saturated with acid gases are obtained, b) saturated absorbent is heated in the first heat exchanger and in the decompression zone pressure is reduced to values in range of 5 to 10 bar, wherein a gas phase is obtained, containing hydrocarbons C5–C8 carbon atoms, and saturated hydrocarbon saturated absorbent, c) saturated with absorbents saturated absorbent is supplied to stripping column, in which at pressure of 1 to 2.5 bar due to heat supply at least partially releasing acid gases, wherein regenerated absorbent and sour gas containing stream are obtained, before the introduction into the stripping column the hydrocarbon-depleted saturated absorbent is optionally heated in the second heat exchanger, and d) the regenerated absorbent is returned to the absorption zone, wherein, if a second heat exchanger is present, as the heating agent in the second heat exchanger, a regenerated absorbent is used, and as heating agent in first heat exchanger regenerated absorbent is used after its passing through second heat exchanger, or, in case of absence of second heat exchanger, as heating agent in first heat exchanger regenerated absorbent is used, and in the first heat exchanger transfer of such amount of heat is realized, that content of acid gases in gas phase containing hydrocarbons C5–C8 carbon atoms, is from 50 to 97 % vol.

EFFECT: disclosed is a method of extracting hydrocarbons C5–C8 carbon atoms and acid gases from a fluid medium stream.

15 cl, 4 dwg, 2 tbl