Title:
METHOD FOR RECOVERING ANIONIC FLUORINE-CONTAINING EMULSIFIER
Document Type and Number:
WIPO Patent Application WO/2014/136692
Kind Code:
A1
Abstract:
Provided is a method that is for recovering an anionic fluorine-containing emulsifier and that can easily and efficiently recover the anionic fluorine-containing emulsifier adsorbed by a basic ion exchange resin. An organic solvent having a nitrile group and an aqueous solution of an inorganic acid are contacted to the basic ion exchange resin that has adsorbed the anionic fluorine-containing emulsifier, and a liquid phase containing the anionic fluorine-containing emulsifier is recovered, or an aqueous solution of an inorganic acid is contacted to the basic ion exchange resin that has adsorbed the anionic fluorine-containing emulsifier, and next, after contacting an organic solvent having a nitrile group, the result is separated into the basic ion exchange resin and a liquid phase, the liquid phase is recovered, and the acid of the anionic fluorine-containing emulsifier is recovered from the liquid phase.
Inventors:
AIDA SHIGERU (JP)
Application Number:
PCT/JP2014/055148
Publication Date:
September 12, 2014
Filing Date:
February 28, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
B01J49/00; B01D15/04; B01J41/04; C07C51/487; C07C59/135
Domestic Patent References:
| WO2011096448A1 | 2011-08-11 | |||
| WO2011096448A1 | 2011-08-11 |
Foreign References:
| JPS632656B2 | 1988-01-20 | |||
| JP2002059160A | 2002-02-26 | |||
| JPS632656B2 | 1988-01-20 |
Other References:
See also references of EP 2965815A4
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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