Acid recovery in clorine dioxide generation

Details Acid recovery in clorine dioxide generation Acid recovery in clorine dioxide generation

1984-08-01

1987-07-07

Doll, John

Chemistry of inorganic compounds

Halogen or compound thereof

Chlorine dioxide

210638, 210639, 210757, 210913, 423480, C01B 1102, B01D 1300, C02F 170

Patent

active

046786554

ABSTRACT:
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 on this way may be recycled to the chlorine dioxide generator, after concentration, if desired.

REFERENCES:
patent: 2376935 (1945-05-01), Persson
patent: 2765215 (1956-10-01), Pechukas et al.
patent: 3132095 (1964-05-01), Wolf et al.
patent: 4104365 (1978-08-01), Howard et al.
patent: 4108770 (1978-08-01), Roy
Process Study of A.R.P. Process, Cowley, 11-9-1977.
Visit Report at Abitibi-Price Inc. Cowley et al., 11-27-1981.
"Chemical Engineering", vol. 91, No. 12, pp. 77, 80, 89, McGraw-Hill Publishing Co., June 11, 1984.

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