Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Production of Aluminium Fluoride with Utilization of Waste Silica.
CORP Author Economic Commission for Europe (UN), Geneva (Switzerland).;Environmental Protection Agency, Washington, DC.
Publisher 5 Apr 84
Year Published 1984
Stock Number PB95-233524
Additional Subjects Waste minimization ; Silica ; Solid waste recovery ; Precipitation ; Aluminum fluoride ; Separation ; Fillers ; Foreign technology
Library Call Number Additional Info Location Last
NTIS  PB95-233524 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/02/1995
Collation 13p
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.