PROCESS FOR REMOVAL OF FLUOROORGANIC COMPOUNDS FROM EMULSIONS

    公开(公告)号:US20230286839A1

    公开(公告)日:2023-09-14

    申请号:US18007066

    申请日:2021-07-30

    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.

    PROCESS TO REDUCE THE CONCENTRATION OF FLUOROORGANIC ACIDIC COMPOUNDS IN AQUEOUS DISPERSIONS

    公开(公告)号:US20230312776A1

    公开(公告)日:2023-10-05

    申请号:US18007062

    申请日:2021-07-30

    CPC classification number: C08F6/24

    Abstract: The present disclosure provides a process for removing fluoroorganic acidic compounds from a dispersion of fluoroorganic polymer particles in at least one protic solvent, the process comprising the following steps: (i) forming a mixture of a. a dispersion having a pH-value of less than 6 and comprising fluoroorganic polymer particles, at least one protic solvent and at least one fluoroorganic acidic compound with b. an extraction composition comprising 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, the fluoroorganic polymer particles and no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the dispersion in step (i); and a second phase comprising the hydrophobic ionic compound; and (iv) removing the first phase from the second phase.

Patent Agency Ranking