||Production of Aluminium Fluoride with Utilization of Waste Silica.
||Economic Commission for Europe (UN), Geneva (Switzerland).;Environmental Protection Agency, Washington, DC.
||5 Apr 84
Waste minimization ;
Solid waste recovery ;
Aluminum fluoride ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The low waste technology is for the production of aluminum fluoride with utilization of waste silica. There are no significant changes in the production of the aluminum fluoride. The use of waste silica permits the manufacture of a marketable product to be used as a filler in rubber compounds. The steps of the process include: (1) Dissolution of the waste inactive silica by treating it with an ammonium fluoride solution; (2) Separation of ammonium cryolite by filtration, to be used in ammonium fluoride production; (3) Precipitation of active silica by treating the ammonium fluosilicate solution with ammonia (gas) or ammonia water; (4) Separation and washing of active silica on the press filter; (5) Evaporation of ammonium fluoride solution; (6) Drying and packaging of active silica.