preparation of pure aluminum fluoride.
Preparation of aluminum fluoride
Poison by intravenous
route. When heated to decomposition it
emits very toxic fumes of F-, NOx, and
NH3. See also ALUMINUM
COMPOUNDS and FLUORIDES.
Freshly precipitated hydrated aluminum oxide is introduced
portionwise into a hot, rather concentrated NH4F solution. A
gelatinous precipitate results which settles easily when the solution
is boiled down. The supernatant liquid is decanted or suctionfiltered,
and the precipitate is washed with an alcohol-water solution
and dried at 105°C.
