METHOD FOR RECOVERING ANIONIC FLUORINATED EMULSIFIER

Title:

METHOD FOR RECOVERING ANIONIC FLUORINATED EMULSIFIER

Document Type and Number:

WIPO Patent Application WO/2013/038990

Kind Code:

A1

Abstract:

Provided is a method for recovering an anionic fluorinated emulsifier enabling an anionic fluorinated emulsifier onto which a basic ion-exchange resin has been adsorbed to be recovered easily and efficiently. A basic ion-exchange resin adsorbed onto an anionic fluorinated emulsifier is brought into contact with a mixture of an inorganic-acid aqueous solution, a fluorinated medium, and a non-fluorinated medium and a liquid phase containing a fluorinated medium is recovered; or a basic ion-exchange resin adsorbed on an anionic fluorinated emulsifier is brought into contact with an inorganic-acid aqueous solution and then brought into contact with a mixture of a fluorinated medium and a non-fluorinated medium, whereupon the basic ion-exchange resin and the liquid phase are separated and the liquid phase is recovered; and an acid of the anionic fluorinated emulsifier is recovered from the liquid phases.

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Inventors:

AIDA SHIGERU (JP)
NARUMI MIZUNA (JP)
HAMAZAKI KAZUO (JP)

Application Number:

PCT/JP2012/072802

Publication Date:

March 21, 2013

Filing Date:

September 06, 2012

Export Citation:

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Assignee:

ASAHI GLASS CO LTD (JP)
AIDA SHIGERU (JP)
NARUMI MIZUNA (JP)
HAMAZAKI KAZUO (JP)

International Classes:

B01J41/04; B01J49/00

Domestic Patent References:

WO2011096448A1	2011-08-11
WO2011096448A1	2011-08-11

Foreign References:

JPS55104651A	1980-08-11
JP2002059160A	2002-02-26
JP2003285076A	2003-10-07
JPS632656B2	1988-01-20

Other References: