Process for the elution of fluorinated emulsifiers

Details Process for the elution of fluorinated emulsifiers Process for the elution of fluorinated emulsifiers

C - Chemistry, Metallurgy

07

C

C07C 53/21 (2006.01) B01J 49/00 (2006.01) C02F 1/42 (2006.01) C07C 51/44 (2006.01) C07C 51/47 (2006.01) C07C 303/44 (2006.01) C07C 309/06 (2006.01)

Patent

CA 2313886

Fluorinated emulsifier acids bound to an anion exchanger resin can be eluted using a mixture of water, a compound of the formula M-X, in which M is an alkali metal or an alkylammonium ion, and X is hydroxyl, fluoride or chloride, and at least one organic solvent which completely dissolves the other components. For work-up of the eluent, this is advantageously subjected to steam distillation until all volatile constituents have been essentially removed, and the emulsifier acid is liberated from the steam distillation residue using a sufficiently strong acid. This emulsifier acid can advantageously be distilled off and collected as the ammonium salt in aqueous ammonia solution.

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