Stabilization of catalyzed aqueous sulfite and bisulfite ion...

Details Stabilization of catalyzed aqueous sulfite and bisulfite ion... Stabilization of catalyzed aqueous sulfite and bisulfite ion...

C - Chemistry, Metallurgy

09

K

C09K 15/06 (2006.01) C01B 17/62 (2006.01) C01D 5/00 (2006.01) C02F 1/20 (2006.01) C02F 5/10 (2006.01) C23F 11/08 (2006.01)

Patent

CA 2160401

A method for stabilizing an aqueous solution containing sulfite or bisulfite ions and a water-soluble metal catalyst. The method comprises incorporating a stabilizing amount of a alpha substituted carboxylic acid or salt thereof or a vinyl carboxylic acid or salt thereof in the solution. The carboxylic acid inhibits sludge formation when the aqueous solution is stored. The preferred carboxylic acid, citric acid, also enhances the oxy- gen scavenging rate of the sulfite and bisulfite when the solution is used to treat aqueous systems for oxygen removal.

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