Water cleaning process

Details Water cleaning process Water cleaning process

2005-04-05

2005-04-05

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C166S267000, C166S305100, C210S149000, C210S170050, C210S175000, C210S259000, C210S512100, C210S747300, C210S749000, C210S774000, C210S806000

Reexamination Certificate

active

06875358

ABSTRACT:
Method and system for extraction of fat or oil-soluble components, e.g. PAH, NDP and/or BTX, from produced water being separated from an oil or gas plant. The method is characterized by injection of a liquid consisting of hydrocarbons from the oil or gas plant into the water flow, the injection liquid having a lower content of the oil soluble components than the original oil phase in equilibrium with the water, the injection liquid is atomized into the whole water phase and the water/hydrocarbon mixture is given a predetermined retention time thus to allow mass transferring of the oil soluble components from the water to the injection liquid, before the injection liquid is separated from the water in a separator, preferably a hydro cyclone, the injection liquid being adapted to the separators working range for pressure and temperature.

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