CLEANING OF RESERVOIR WATER Russian patent published in 2018 - IPC C02F1/00 C02F101/32 B01D17/35 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in the oil-producing and petrochemical industries. Process for treating water containing aromatic hydrocarbons includes at least the following steps: (i) introducing a stream (I) comprising water and aromatic hydrocarbons selected from the group consisting of benzene, toluene, ethylbenzene and xylene into a column, (ii) contacting stream (I) with a second stream (II) in countercurrent, and (iii) removing a third stream (III) comprising water and aromatic hydrocarbons selected from the group consisting of benzene, toluene, ethylbenzene and xylene. Concentration of aromatic hydrocarbons is ≤3 mg/l in terms of the volume of stream (III). Second stream (II) contains associated petroleum gas, comprising ≥30 to ≤75 vol. % methane.

EFFECT: invention makes it possible to provide a simple and cheap method of removing aromatic hydrocarbons.

16 cl, 1 dwg