Gaseous reduction of phosphoric acid

Details Gaseous reduction of phosphoric acid Gaseous reduction of phosphoric acid

C - Chemistry, Metallurgy

01

B

53/211, 23/76

C01B 25/238 (2006.01) C01G 43/00 (2006.01) C22B 60/02 (2006.01)

Patent

CA 1198576

ABSTRACT OF THE DISCLOSURE A process for reducing the valence state of ferrous and other ions present in phosphoric acid by heating the acid in the presence of a pressurized reducing gas, preferably hydrogen. The pressurized gas reduces the ions without an addition of metallic iron or other impurity. This process is desirably used with processes for recovering uranium from wet process phosphoric acid, wherein ferric or uranyl ions in the phosphoric acid are reduced in a pressurized reducing gas.

421697

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