Invention Grant
US07807726B2 Recovery of fluorinated surfactants from a basic anion exchange resin having quaternary ammonium groups 有权
从具有季铵基团的碱性阴离子交换树脂中回收氟化表面活性剂

Recovery of fluorinated surfactants from a basic anion exchange resin having quaternary ammonium groups
Abstract:
The invention provides a method for recovery of a fluorinated anionic surfactant from a basic anion exchange resin having quaternary ammonium groups, the method comprising eluting the anion exchange resin with a composition comprising an ammonium salt and a water miscible organic solvent. The method according to the invention may provide one or more of the following advantages. For example, the method can be designed to allow for recovery of substantially all of the fluorinated surfactant from a basic anion exchange resin having quaternary ammonium groups. Also, the liquid used for recovering the surfactant from the anion exchange resin is a simple liquid that can be readily and cost effectively manufactured. Further the process may be carried out in a convenient and easy manner. Furthermore, the method generally does not require large amounts of the eluting composition.
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