Process for preparation of ammonium tetrafluoroaluminate

Details Process for preparation of ammonium tetrafluoroaluminate Process for preparation of ammonium tetrafluoroaluminate

1975-10-24

1977-07-05

Stern, Edward

Chemistry of inorganic compounds

Halogen or compound thereof

Plural metal or metal and ammonium containing

423396, 423470, 423549, C01F 750, C01C 116, C01C 118

Patent

active

040340686

ABSTRACT:
An inorganic acid typified by H.sub.2 SO.sub.4 is added to an aqueous slurry of (NH.sub.4).sub.3 AlF.sub.6 and either Al(OH).sub.3 or Al.sub.2 O.sub.3, and the resulting mixture is kept for a while under the atmospheric pressure at or somewhat above room temperature. The acid is added preferably in such an amount that the pH of the slurry after completion of the reaction is 4 to 7.

REFERENCES:
patent: 3556717 (1971-01-01), Kidde
patent: 3615180 (1971-10-01), Kadotani et al.
patent: 3635659 (1972-01-01), Kidde
patent: 3647366 (1972-03-01), Thoonen
patent: 3694150 (1972-09-01), Kidde
patent: 3755548 (1973-08-01), Weise et al.

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