Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1986-01-24
1986-12-02
Doll, John
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75101BE, 75114, 75108, 75121, 423 211, 423 49, 423 51, 423 53, 423 57, 423147, 423150, 423263, C22B 300
Patent
active
046262806
ABSTRACT:
A process is disclosed for recovering tungsten, iron, and manganese from tungsten bearing material. The process involves digesting the material in a sulfur dioxide solution at a sufficient temperature for a sufficient time to form a digestion solution containing the major portion of the scandium, iron, and manganese, and a digestion solid containing the major portion of the tungsten which is separated from the digestion solution. The major portion of the scandium is extracted from the digestion solution with an organic consisting essentially of an extracting agent which is essentially a mixture of alkyl primary amines which are present in an amount sufficient to extract the major portion of the scandium without extracting appreciable amounts of iron and manganese, and the balance an essentially aromatic solvent. After separation of the scandium containing organic from the raffinate, the organic is stripped of the scandium with hydrochloric acid which is then separated from the stripped organic. The raffinate is adjusted to a pH of at least about 3.5 with a base to precipitate the major portion of the iron and manganese which is separated from the resulting liquor. A sufficient amount of chlorine gas is contacted with an aqueous slurry of the precipitate at a sufficient temperature for a sufficient time to form a manganese containing solution containing the major portion of the manganese which was in the precipitate and a solid containing the major portion of the iron which was in the precipitate.
REFERENCES:
patent: 2747965 (1956-05-01), Daugherty
patent: 3582290 (1971-06-01), Grinstead
patent: 4016237 (1977-04-01), Mason et al.
Ladd Judith A.
MacInnis Martin B.
Vanderpool Clarence D.
Castle Donald R.
Doll John
GTE Products Corporation
Quatrini L. Rita
Stoll Robert L.
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