Title:
Method for recovering anionic fluorine-containing emulsifier
Document Type and Number:
Japanese Patent JP6304233
Kind Code:
B2
Abstract:
To provide a method for recovering an anionic fluorinated emulsifier, whereby an anionic fluorinated emulsifier adsorbed on a basic ion exchange resin can be simply and efficiently recovered. An aqueous inorganic acid solution and an organic solvent having a nitrile group are contacted to a basic ion exchange resin having an anionic fluorinated emulsifier adsorbed thereon, to recover a liquid phase containing the anionic fluorinated emulsifier, or an aqueous inorganic acid solution is contacted to a basic ion exchange resin having an anionic fluorinated emulsifier adsorbed thereon, then an organic solvent having a nitrile group is contacted thereto, and thereafter the basic ion exchange resin and a liquid phase are separated to recover the liquid phase, whereupon from the liquid phase, an acid of the anionic fluorinated emulsifier is recovered.
Inventors:
Shigeru Aida
Application Number:
JP2015504283A
Publication Date:
April 04, 2018
Filing Date:
February 28, 2014
Export Citation:
Assignee:
Asahi Glass Co., Ltd.
International Classes:
B01J49/57; B01J41/05; B01J41/12; B01J41/16; B01J49/07; B01J49/14
Domestic Patent References:
| JP5983615B2 | ||||
| JP63002656B1 | ||||
| JP2002059160A |
Foreign References:
| WO2011096448A1 |
Attorney, Agent or Firm:
Sumio Tanai
Masatake Shiga
Suzuki Mitsuyoshi
Noriko Yanai
Masatake Shiga
Suzuki Mitsuyoshi
Noriko Yanai
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