Process for the recovery of fluorine from an aqueous solution

Details Process for the recovery of fluorine from an aqueous solution Process for the recovery of fluorine from an aqueous solution

1973-09-27

1977-02-01

Stern, Edward

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423490, 423551, 210 37R, 210 38R, 75101BE, C01D 500, C01D 302, C02B 156, C02B 142

Patent

active

040062147

ABSTRACT:
A process for the treatment of aqueous solutions containing cations and anions, including aluminum sulphate and fluoride ions, for the recovery of the fluorine contained in the aqueous solution by means of an ion exchange plant, in which the aqueous solution flows through at least a strong acid cation-exchanger filter step, then a first weak basic anion-exchanger filter step which produces an almost complete separation of the sulphate ions, and after that a second weak basic anion-exchanger filter step which separates out the fluorine ions, and the fluoride is recovered from an eluate obtained during regeneration of the second anion-exchanger filter step.

REFERENCES:
patent: 3458440 (1969-07-01), Schmidt
patent: 3661775 (1972-05-01), Miyahara et al.
The Permutit Co., 1956, pp. 3-5, copyright 1956.
"Ion Exchange Resins," book by Robert Kunin, 1958 Ed., p. 60, John Wiley & Sons, Inc., New York.
The Permutit Co., "Demineralization including Silica Removal," 1956, pp. 9 and 12.

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