Reaktion #1509021

Reaktionsgleichung

fluosilicic acid

aluminum fluoride

aluminum fluoride

fluosilicic acid

aluminum hydroxide

Aluminum fluoride

→

AlF3

aluminum fluoride trihydrate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe produced silica was separated by filtration
2. 2
   Sonstigeto prepare a super-saturated solution of aluminum fluoride having a concentration of aluminum fluoride
3. 3
   SonstigeAfter crystallization
4. 4
   Filtrationthe crystal particles were collected by filtration
5. 5
   Sonstigedried at 105° C. for 3 hours

Vorschrift

A fluosilicic acid solution and aluminum hydroxide were reacted with each other in a molar ratio shown in Table 1, and the produced silica was separated by filtration to prepare a super-saturated solution of aluminum fluoride having a concentration of aluminum fluoride and a concentration of fluosilicic acid shown in Table 1. Aluminum fluoride particles having an average particle diameter of 78 μm (specific surface area of 36.8 m2 /kg) were added as seed crystals to this super-saturated solution of aluminum fluoride, the resulting solution was maintained at a temperature of 93° C., stirred at a rate of 1.5 m/sec for 5 hours, and aluminum fluoride was deposited on the surfaces of the seed crystals to grow seed crystal particles. After crystallization, the crystal particles were collected by filtration and dried at 105° C. for 3 hours to obtain aluminum fluoride trihydrate particles (AlF3 ·3H2O).

Quelle