Process for the manufacture of aluminum fluoride

Details Process for the manufacture of aluminum fluoride Process for the manufacture of aluminum fluoride

1979-04-03

1980-12-09

Thomas, Earl C.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary fluorine containing compound

423495, C01F 750

Patent

active

042384699

ABSTRACT:
Aluminum fluoride with an AlF.sub.3 content of at least 96% by weight relative to the anhydrous product is produced by reacting aluminum hydroxide with aqueous fluosilicic acid, removing the precipitated silica, adding hydrofluoric acid in a quantity of 0.1-1% by weight of HF relative to the so produced AlF.sub.3 containing solution having an AlF.sub.3 content of 20 to 50 percent and atomizing same before the start of crystallization of the aluminum fluoride at temperatures of 110.degree.-350.degree. C. optionally using aluminum fluoride particles as heat transfer agents.

REFERENCES:
patent: 125406 (1872-04-01), Percy
patent: 3385658 (1968-05-01), Broja et al.
Bohm et al. "Die Aluminiumfluorid-Synthese als Beispiel fur Gas/Feststoff-Reaktionen in expandierten Wirbelschichten", Chem. Ing. Techn., No. 4, 1976 p. 341.
Schmidt, "Herstellung von Aluminiumfluorid als Nebenprodukt der Phosphatdungemittel-Industrie", Chem. Ing. Techn., 1967, pp. 521-525.

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