Removal of arsenic from acids

Details Removal of arsenic from acids Removal of arsenic from acids

C - Chemistry, Metallurgy

25

C

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C25C 1/22 (2006.01) C01B 7/07 (2006.01) C01B 17/90 (2006.01) C01B 25/238 (2006.01) C02F 1/461 (2006.01) C02F 1/467 (2006.01)

Patent

CA 1257222

16 ABSTRACT OF THE DISCLOSURE Dissolved arsenic (III) contaminant is removed from mineral acids, such as hydrochloric acid, by electrolysis using a high surface area cathode having a three-dimensional electrolyte-contacting surface which exposes the electrolyte to electrolysis for a relatively long period of time. The dissolved arsenic is reduced to arsenic metal, which then plates out on the cathode. Dissolved concentrations of arsenic of less than 1 ppm can be achieved using the invention.

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