Regeneration of cationic exchange resins

Details Regeneration of cationic exchange resins Regeneration of cationic exchange resins

1990-11-08

1992-01-21

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210686, 521 26, B01D 1504

Patent

active

050825674

ABSTRACT:
Disclosed is a method of regenerating a cationic exchange resin that has been exposed to chlorate ion. The resin is treated with an acidic regenerating solution that contains sulfite ion in an amount at least stoichiometric with the amount of chlorate remaining on the resin. The resin can either be rinsed with water first and then contacted with an acidic regenerating solution containing sulfite, or the resin can be washed with acidic water containing sulfite ion and then treated with an acidic regenerating solution.

REFERENCES:
patent: 4335000 (1982-06-01), Grier et al.
patent: 4486390 (1984-12-01), Schmiedel
"Oxygen Atom Transfer in the Reaction of Chlorate with Sulfite in Aqueous Solution", Halperin, J. and Taube, H., J. Am. Chem. Soc. 72, pp. 3319-3320 (1952).

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