Process for recovering a uranium-containing concentrate and purified phosphoric acid from a wet process phosphoric acid containing uranium
AssigneeStamicarbon B.V.
InventorsCornelis A. M. Weterings, Johannes A. Janssen
Life of this patent
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Abstract
A process for recovering from a wet process phosphoric acid which contains uranium, a uranium containing concentrate and a purified phosphoric acid. The wet process phosphoric acid is treated with a precipitant in the presence of a reducing agent and an aliphatic ketone.
Claims12
Process for recovering a uranium containing concentrate and a purified phosphoric acid from a wet process phosphoric acid comprising the steps of,
- (a) treating said wet process phosphoric acid first with (i) from about 0.15% to about 7% by weight of ammonium fluoride calculated as fluoride in relation to the amount by weight of P.sub.2 O.sub.5 in the phosphoric acid, and (ii) a reducing agent, and thereafter with from about 120% to about 900% by weight of an aliphatic ketone calculated in relation to the amount by weight of P.sub.2 O.sub.5 in the phosphoric acid, to form an uranium containing precipitate,
- (b) separating said precipitate from the remaining mixture of phosphoric acid and aliphatic ketone, and
- (c) recovering purified phosphoric acid from said mixture of phosphoric acid and aliphatic ketone.
Process for recovering a uranium containing concentrate and a purified phosphoric acid from a wet process phosphoric acid containing uranium wherein the sulphate content of said wet process phosphoric acid is less than about 0.6% by weight calculated in relation to the amount by weight of P.sub.2 O.sub.5 comprising the steps of,
- (a) admixing, to a wet process phosphoric acid containing uranium, a compound that reacts with sulphate ions to form a resultant precipitate that is insoluble in phosphoric acid,
- (b) separating out the resultant precipitate from the wet process phosphoric acid containing uranium,
- (c) treating the wet proces phosphoric acid containing uranium of step (b) first with (i) from about 0.15% to about 7% by weight of ammonium fluoride calculated as fluorine in relation to the amount by weight of P.sub.2 O.sub.5 in the phosphoric acid, and (ii) a reducing agent and thereafter with from about 120% to about 900% by weight of an aliphatic ketone calculated in relation to the amount by weight of P.sub.2 O.sub.5 in the phosphoric acid to form a resultant uranium containing precipitate,
- (d) separating out said uranium containing precipitate from the remaining mixture of phosphoric acid and aliphatic ketone, and
- (e) recovering the phosphoric acid from said mixture of phosphoric acid and aliphatic ketone.
Dependencies are inferred from the claim text.