Invention Publication
- Patent Title: Process for Removal of Fluoroorganic Compounds From Aqueous Media
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Application No.: US18018282Application Date: 2021-07-30
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Publication No.: US20240018084A1Publication Date: 2024-01-18
- Inventor: Klaus Hintzer , Stefan Huber , Valentina Krupp , Herbert Koenigsmann , Scott D. Schmick , Zhongxing Zhang , Michael D. Barrera , William M. Lamanna , Chetan P. Jariwala , Markus Hirschberg
- 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
- Priority: EP 188786.6 2020.07.30
- International Application: PCT/US2021/043958 2021.07.30
- Date entered country: 2023-01-27
- Main IPC: C07C51/48
- IPC: C07C51/48 ; C02F1/26

Abstract:
The present disclosure provides a process for removing fluoroorganic acidic compounds from a solution comprising at least one protic solvent, comprising: forming a mixture of a solution comprising at least one fluoroorganic acidic compound comprising less than 15 carbon atoms and protic solvent, wherein the solution has a pH of 4, with an extraction composition comprising at least one trialkylamine and organic solvent; reacting the fluoroorganic acidic compound with the trialkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the trialkylamine; separating the mixture into a first phase comprising the protic solvent and at most 50 wt. % of the fluoroorganic acidic compound present in the initial solution; and a second phase comprising the organic solvent and hydrophobic ionic compound; removing the second phase from the first phase; and repeating steps aforementioned at least once more, wherein the first phase obtained in the last step is used as the initial solution.
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