Method for recovering anionic fluorinated emulsifier

A method for recovering an anionic fluorinated emulsifier comprises contacting a strongly basic ion exchange resin having an anionic fluorinated emulsifier adsorbed thereon to an aqueous inorganic acid solution and an organic solvent comprising a nitrile group. The anionic fluorinated emulsifier is...

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Bibliographische Detailangaben
1. Verfasser:	Aida Shigeru
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for recovering an anionic fluorinated emulsifier comprises contacting a strongly basic ion exchange resin having an anionic fluorinated emulsifier adsorbed thereon to an aqueous inorganic acid solution and an organic solvent comprising a nitrile group. The anionic fluorinated emulsifier is eluted from the strongly basic ion exchange resin, and a liquid phase comprising an acid of the anionic fluorinated emulsifier is obtained. An acid of the anionic fluorinated emulsifier is recovered from the liquid phase. The strongly basic ion exchange resin and the liquid phase are preferably separated, after the aqueous inorganic acid solution and the organic solvent are contacted to the strongly basic ion exchange resin, and before the acid of the anionic fluorinated emulsifier is recovered from the liquid phase.