Title:
METHOD OF RECOVERING FLUOROCHEMICAL SURFACTANT
Document Type and Number:
WIPO Patent Application WO/2002/013953
Kind Code:
A1
Abstract:
A method of more efficiently recovering a fluorochemical surfactant from an aqueous solution containing the surfactant. The method of recovering a fluorochemical surfactant comprises subjecting an aqueous solution containing the surfactant to a filtration treatment with a reverse osmosis membrane to obtain from the aqueous solution a concentrated aqueous solution of the fluorochemical surfactant.
Inventors:
ICHIDA TAKUYA (JP)
KONDO MASAHIRO (JP)
KONDO MASAHIRO (JP)
Application Number:
PCT/JP2001/006799
Publication Date:
February 21, 2002
Filing Date:
August 08, 2001
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
ICHIDA TAKUYA (JP)
KONDO MASAHIRO (JP)
ICHIDA TAKUYA (JP)
KONDO MASAHIRO (JP)
International Classes:
B01D61/02; B01D61/04; B01D69/12; B01D71/56; B01D71/64; B01D71/68; C07C51/42; C07C53/21; C08F2/26; C08F6/00; C08F6/22; C08F14/18; C08F16/24; (IPC1-7): B01D61/02; B01D71/56; B01D71/64; B01D71/68; C08F6/14
Foreign References:
| EP0460284A2 | 1991-12-11 | |||
| JPS5137973A | 1976-03-30 | |||
| US2559752A | 1951-07-10 |
Other References:
See also references of EP 1323460A4
Attorney, Agent or Firm:
Aoyama, Tamotsu (3-7 Shiromi 1-chom, Chuo-ku Osaka-shi Osaka, JP)
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