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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