Chemistry of inorganic compounds – Halogen or compound thereof – Binary fluorine containing compound
Patent
1974-08-12
1976-06-22
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Binary fluorine containing compound
423 87, 423126, 423305, C01F 750, C01B 2526, C01G 2900
Patent
active
039652483
ABSTRACT:
Aqueous AlF.sub.3 enriched crystallization mother liquors contaminated with P.sub.2 O.sub.5 values and having less than 5% free acidity are treated with a material which provides bismuth ions in the mother liquor in amounts small enough to insure that the Bi/PO.sub.4 mole ratio remains below about 1.05. Under these conditions, the bismuth and P.sub.2 O.sub.5 react essentially quantitatively to form a BiPO.sub.4 precipitate by which the P.sub.2 O.sub.5 can be separated from the mother liquor. Bismuth can be regenerated from the BiPO.sub.4 and recycled for further use in the process.
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Nutt Michael O.
Wiewiorowski Tadeusz K.
Freeport Minerals Company
Schapira Ronald A.
Stern Edward
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