January 2001

Columns

HP Water Management: Select the right caustic for strong base anion demineralizers

Select the right caustic for strong base anion demineralizers

Huchler, L. A., MarTech Systems, Inc.

To manufacture caustic soda, brine (NaCl) is "split," producing caustic and chlorine. The cost of caustic has increased recently from declining chlorine usage. On occasion, purchasing agents have requested approval to source a less expensive grade of caustic. Often, resin suppliers insist that high chlorate concentrations in lower caustic grades may compromise the integrity of strong base anion (SBA) resin. This shortened resin life may incur higher costs due to more frequent resin replacement. The value of using the highest quality of caustic has been challenged due to cost reductions for anion resin and increased manuf

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