Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1994-03-28
1995-05-09
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204103, 2041824, 204151, B01D 6144
Patent
active
054136822
ABSTRACT:
Fluoride is recovered from an aqueous ammonium fluoride and ammonium hydroxide solution by electrolyzing the solution in an electrochemical cell having an ion-exchange membrane between a catholyte chamber and an anolyte chamber whereby hydrofluoric acid is formed and the concentration of ammonium hydroxide is enriched. Part of the hydrofluoric acid can be combined with the ammonium fluoride remaining after the ammonium hydroxide had been stripped from the treated solution to produce ammonium acid fluoride.
REFERENCES:
patent: 3450609 (1969-06-01), Carlin
patent: 4394226 (1983-07-01), Wade et al.
patent: 4943360 (1990-07-01), Sugisawa et al.
Y. C. Chiao et al., Bipolar Membranes for Purification of Acids and Bases, Journal of Membrane Science, 16 (1991) pp. 239-252 no month.
K. N. Mani and F. P. Chlanda, Recovery of Spent Mineral Acids Via Electrodialytic Water Splitting, International Technical Conference on Membrane Separation Processes, Brighton, UK, May 24-26, 1989, Paper G2 pp. 235-251.
K. N. Mani et al., Aquatech Membrane Technology for Recovery of Acid/Base Values from Salt Streams, paper presented at the 5th Symposium on Synthetic Membranes in Science and Industry, Sep. 2-5, 1986 pp. 149-168.
Babb Steven J.
Harmon John L.
Kim Bang M.
Thornton Roy F.
General Electric Company
Magee Jr. James
Niebling John
Phasge Arun S,.
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