Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1974-10-21
1976-01-13
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
423 57, 423 58, 423 61, 423593, 423606, C01G 3900
Patent
active
039325806
ABSTRACT:
A method for purifying technical grade molybdenum oxide derived from the roasting of molybdenite concentrates by which the molybdenum oxide feed material is admixed with sulfuric acid and pugged to form a plurality of reaction pellets which are heated to an elevated temperature to effect a baking and subsequent roasting thereof and a reaction between the metal contaminants and the sulfuric acid to produce aqueous soluble sulfate compounds. The resultant roasted pelletized oxide is ground and leached to remove the contaminating metal sulfates, whereafter the leached pellets are contacted with an aqueous ammoniacal solution for converting the molybdenum oxide constituent therein to ammonium molybdate dissolved in the solution, which is separated from the insoluble residue, which is discarded to waste and the solution is crystallized to recover the ammonium molybdate product which, in turn, may be calcined to produce a high purity molybdenum oxide product.
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Ronzio Richard A.
Vertes Michael A.
Amax Inc.
Carter Herbert T.
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