Liquid purification or separation – With preliminary chemical manufacture
Patent
1998-08-27
2000-04-18
Simmons, David A.
Liquid purification or separation
With preliminary chemical manufacture
2101981, 422187, 422291, C01B 1102
Patent
active
060511354
ABSTRACT:
A method and apparatus for forming an aqueous chlorine dioxide solution is disclosed which includes reacting in a reaction vessel an acid reaction solution containing a hydroxy carboxylic acid and a companion acid with an alkali metal salt of a chlorite ion. In accordance with the process, the hydroxy carboxylic acid serves to temporarily transfer chlorine from and does not form a salt with the alkali metal salt of a chlorite ion. The aqueous chlorine dioxide solution produced is substantially free of chlorous acid and preferably is free of other by-products such as sodium chloride and free chlorine. The method further includes maintaining the reaction vessel at a pH of less than 5 and/or withdrawing at least a portion of the chlorine dioxide from the aqueous chlorine dioxide solution. The method enables rapid, efficient, compact and safe generation of chlorine dioxide. A method of disinfecting water, and apparatus for making chlorine dioxide and for disinfecting water also are provided.
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Lanterman H. Bryan
Lee Sunggyu
Morrison Betsey J.
Simmons David A.
Water Technologies Limited
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