Invention Grant
- Patent Title: Recovery of branched fluorinated emulsifiers
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Application No.: US15302525Application Date: 2015-04-15
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Publication No.: US09694333B2Publication Date: 2017-07-04
- Inventor: Klaus Hintzer , Egon Obermaier , Arne Thaler
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Julie Lapos-Kuchar
- International Application: PCT/US2015/025937 WO 20150415
- International Announcement: WO2015/160926 WO 20151022
- Main IPC: C07C51/42
- IPC: C07C51/42 ; B01F17/00 ; B01J49/07 ; B01J49/57 ; B01J41/12 ; B01J41/05

Abstract:
Described herein is a process for recovering a branched, ether-containing fluorinated emulsifier from an anion exchange resin by (1) contacting the anion exchange resin with a recovery fluid to form an eluate, the recovery fluid comprising an ammonium salt, water, and a water-miscible solvent, wherein the fluorinated emulsifier is of the formula: [Rf-(0-R′f)n-0-CF(CF3)-C(0)0-]i M+1; and (2) separating the anion exchange resin from the eluate.
Public/Granted literature
- US20170028370A1 RECOVERY OF BRANCHED FLUORINATED EMULSIFIERS Public/Granted day:2017-02-02
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