Process for the recovery of surfactants

Details Process for the recovery of surfactants Process for the recovery of surfactants

2007-01-02

2007-01-02

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

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

C210S633000, C210S748080, C210S767000, C210S151000, C210S188000

Reexamination Certificate

active

10561176

ABSTRACT:
The present invention relates to a method for recovering a surfactant from a water-carbon dioxide system comprising at least one type of surfactant, water and carbon dioxide, the method comprising the step of bringing the water-carbon dioxide system into contact with a dehydrating agent to remove water. Furthermore, the present invention relates to a method comprising the steps of installing a device for selectively removing a removal target in a circulation line in which circulated is a mixed system comprising carbon dioxide, a carbon dioxide-compatible surfactant and/or a cosolvent, and a removal target; circulating the mixed system; and selectively removing the removal target that has been incorporated into the surfactant and/or cosolvent.

REFERENCES:
patent: 6235701 (2001-05-01), Senger Elsbernd
patent: 2001/0025121 (2001-09-01), Matsushita et al.
patent: 2002/0132192 (2002-09-01), Namatsu
patent: 2004/0038532 (2004-02-01), Kawakami et al.
patent: 2004/0231707 (2004-11-01), Schilling et al.
patent: 6-114202 (1994-04-01), None
patent: 2000-138156 (2000-05-01), None
patent: 2001-247519 (2001-09-01), None
patent: 2002-543241 (2002-12-01), None

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