Invention Grant
- Patent Title: Method for recovering anionic fluorinated emulsifier
- Patent Title (中): 阴离子氟化乳化剂回收方法
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Application No.: US14794069Application Date: 2015-07-08
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Publication No.: US09550717B2Publication Date: 2017-01-24
- Inventor: Shigeru Aida
- Applicant: ASAHI GLASS COMPANY, LIMITED
- Applicant Address: JP Tokyo
- Assignee: Asahi Glass Company, Limited
- Current Assignee: Asahi Glass Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2013-043967 20130306
- Main IPC: C07C51/487
- IPC: C07C51/487 ; B01J41/04 ; B01J49/00 ; C07C59/135 ; B01D15/20 ; B01D15/36

Abstract:
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.
Public/Granted literature
- US20150307434A1 METHOD FOR RECOVERING ANIONIC FLUORINATED EMULSIFIER Public/Granted day:2015-10-29
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