Chemistry of inorganic compounds – Halogen or compound thereof – Plural metal or metal and ammonium containing
Patent
1992-07-09
1993-09-07
Rosenberg, Peter D.
Chemistry of inorganic compounds
Halogen or compound thereof
Plural metal or metal and ammonium containing
423464, C01F 754
Patent
active
052426696
ABSTRACT:
An improved method of making high quality potassium tetrafluoroaluminate. Hydrofluoric acid is added to high purity aluminum metal powder to form aluminum fluoride in solution. Nitric acid is added to this solution whereby impurities in the solution dissolve into the nitric acid. Water is then added to the solution to precipitate from the solution solid aluminum fluoride with impurities removed therefrom. The aluminum fluoride is then milled in the presence of hydrofluoric acid and potassium hydroxide whereby the exposure thereto produces the high quality potassium tetrafluoroaluminate which may then be washed and dried.
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Rosenberg Peter D.
The S. A. Day Mfg. Co., Inc.
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