Acid recovery in chlorine dioxide generation

Details Acid recovery in chlorine dioxide generation Acid recovery in chlorine dioxide generation

C - Chemistry, Metallurgy

01

B

23/147

C01B 11/02 (2006.01) B01D 43/00 (2006.01) C01B 17/90 (2006.01) C02F 1/70 (2006.01)

Patent

CA 1242306

ABSTRACT OF THE DISCLOSURE Effluent acid from a non-evaporating chlorine dioxide-generating process is subjected to diffusion- dialysis across an anion-exchange membrane to preferentially transfer sulphuric acid from the effluent acid stream to a recipient aqueous medium while sodium sulphate remains in a waste stream. The sulphuric acid extracted from the effluent acid stream in this way may be recycled to the chlorine dioxide generator, after concentration, if desired.

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