Chromate removal from concentrated chlorate solution by...

Details Chromate removal from concentrated chlorate solution by... Chromate removal from concentrated chlorate solution by...

C - Chemistry, Metallurgy

25

B

204/62.5

C25B 1/26 (2006.01) C25C 1/10 (2006.01)

Patent

CA 1187036

ABSTRACT _ A process for removing and recovering precipitated solid particles of divalent or trivalent chromium compounds from an aqueous alkali metal chlorate solution containing them which comprises passing the aqueous solution through a first centrifuge to obtain an overflow solution and an under- flow solution, filtering the overflow solution and adding the filter cake therefrom to the underflow solution to form a slurry, diluting the slurry with more water and passing through a second centrifuge to form a second overflow aqueous solution and a second underflow aqueous solution. The second overflow aqueous stream is then mixed with an alkali metal halide to form a brine and is fed to an electrolytic cell.

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