Methods of making and washing scorodite

Details Methods of making and washing scorodite Methods of making and washing scorodite

C - Chemistry, Metallurgy

30

B

C30B 29/40 (2006.01) C01G 28/02 (2006.01) C22B 3/08 (2006.01) C22B 3/24 (2006.01) C22B 3/46 (2006.01) C25C 1/12 (2006.01)

Patent

CA 2634876

A method of making scorodite includes the following steps: (1) an acidic aqueous solution containing pentavalent As and trivalent Fe is heated at a temperature for a time, the temperature and the time being effective for synthesis of crystalline scorodite; (2) the synthesized scorodite is separated from the post-reaction solution by solid-liquid separation; and (3) the scorodite is washed with water and is separated from the washing solution by solid-liquid separation. Step (3) is repeated until the concentration of at least one component of the post-reaction solution contained in the washing solution used for washing the scorodite decreases to a predetermined level.

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