Hello All, I have a caustic soda scrubber (NaOH) to eliminate mercaptanes from butane. It is a batch. The concentration of NaOH at the begining of run is 30%. The solution usually gets spent when the concentration is around 10%. Recently, we discovered that, the NaOH solution gets spent when the concentration is still at above 20%. this has happened twice already.
I would like to know if any body has witness this phenomenon and how it was resolved.
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