Method of recovering fluorochemical surfactant

Details Method of recovering fluorochemical surfactant Method of recovering fluorochemical surfactant

2005-12-06

2005-12-06

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

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

C210S654000, C562S605000, C570S177000

Reexamination Certificate

active

06972094

ABSTRACT:
Upon recovering a fluorochemical surfactant from a fluorochemical-containing aqueous solution, there is provided a method for recovering the fluorochemical surfactant from the aqueous solution containing the surfactant. In the method, the fluorochemical surfactant is recovered by subjecting the aqueous solution containing the fluorochemical surfactant to a filtration treatment step with a reverse osmosis membrane so as to obtain from the aqueous solution, a concentrated aqueous solution in which the concentration of the fluorochemical surfactant is increased.

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