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AssigneeAsahi Glass Company, Limited
InventorsShinya Higuchi, Jun Hoshikawa, Hiroki Kamiya, Yasuhiko Matsuoka, Hiroshi Funaki
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A simple and efficient method for regenerating a basic anion-exchange resin, whereby at the time of removing a fluorinated emulsifier from a basic anion-exchange resin having the fluorinated emulsifier adsorbed thereon, it is unnecessary to provide a safety device/recovery technique necessary for handling an organic solvent by the use of a combustible organic solvent represented by an alcohol, and a burden imposed by e.g. treatment against COD load, is eliminated. A basic anion-exchange resin having a fluorinated emulsifier adsorbed thereon is contacted with an aqueous alkaline solution having a temperature of from 60 to 105° C. to elute the fluorinated emulsifier thereby to regenerate the basic anion-exchange resin.
A method for regenerating a basic anion-exchange resin, which comprises contacting, in the absence of an organic solvent, a basic anion-exchange resin having a fluorinated emulsifier adsorbed thereon with an aqueous alkaline solution having a temperature of from 60 to 105° C. to elute the fluorinated emulsifier thereby to regenerate the basic anion-exchange resin.
Dependencies are inferred from the claim text.