In the manufacturing process, adding water to the final concentration is very important. The measurement of the final product’s concentration has formerly been carried out using titration in a laboratory. This technique often gives inaccurate results due to many possible external factors. Laboratory measurement is also unable to give a continuous indication of true concentration levels.
Vaisala K-PATENTS® Process Refractometer PR-43-GC is mounted in the circulation loop. Output signals from the refractometer are used to control the addition of water to the solution prior to the static mixer, maintaining the final sodium acetate concentration at approximately 7 % b.w. The temperature is between 40 and 50 ºC (104 and 122 ºF).
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