公开(公告)号：US20230286839A1

公开(公告)日：2023-09-14

申请号：US18007066

申请日：2021-07-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Klaus Hintzer ,  Herbert Koenigsmann ,  Stefan Huber ,  Valentina Krupp ,  Scott D. Schmick ,  Zhongxing Zhang

IPC: C02F1/54 ,  C08F6/16 ,  C02F1/26

CPC classification number: C02F1/54 ,  C08F6/16 ,  C02F1/26 ,  C02F2101/36

Abstract: The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps: (i) forming a mixture of a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with b. at least one alkylamine; (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine; (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 80% by weight, preferably no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound; (iva) removing the first phase from the second phase; and then (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then (vb) removing the first phase from the second phase.

公开(公告)号：US20240018084A1

公开(公告)日：2024-01-18

申请号：US18018282

申请日：2021-07-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: C07C51/48 ,  C02F1/26

CPC classification number: C07C51/48 ,  C02F1/26 ,  C02F2303/16 ,  C02F2101/36

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.