| abstract |
(57) [Problem] To provide a method for adsorbing and recovering a fluorine-containing emulsifier from a fluorine-containing emulsifier aqueous solution (A) at a high recovery rate in a short time. SOLUTION: n filled with a weakly basic anion exchange resin (N is 3 to 10) using a packed tower, and (n− 1) The packed tower is connected in series, and the aqueous solution (A) is supplied to the first packed tower to perform the adsorption operation, and the remaining 1 In the method of performing the desorption operation in the packed tower of the book, if the fluorinated emulsifier is detected in the effluent water from the last packed tower, The effluent water is guided to the remaining one packed column after the desorption operation, the aqueous solution (A) is supplied to the packed column next to the first packed column, and the first packed column is desorbed. Adsorption / recovery method of fluorine-containing emulsifier. |