Chlorine Analyzers for Chlor-alkali Process

Chlor-alkali refers to the chemicals simultaneously being produced as a result of electrolysis of a saltwater or brine solution. Typically, the chlor-alkali process produces two chemicals, chlorine and sodium hydroxide (caustic soda, NaOH). Over 95% of the world’s chlorine is produced in the chlor-alkali process.

In the chlor-alkali process, using an electrolytic cell, chlorine is generated by running an electric current across a brine solution. The “wet” chlorine from the electrolytic cell is then purified further by removing moisture via a cooling tower, filtration and sulfuric acid drying towers. The gaseous chlorine then undergoes liquefaction where liquid chlorine is separated from residual gaseous chlorine that was unable to condense due impurities in its composition. The residual stream can then be sent to a caustic scrubber for further gas processing, while the final chlorine product can be used in a range of applications including EDC/VCM plants which produce precursors for PVC. Monitoring the Cl2 and NCl3 impurity throughout the chlor-alkali process is vital for safety concerns, environmental regulations, and process efficiency purposes.

The OMA-300-Cl2 analyzer showcases a seamless dynamic range of the OMA Series from low ppm up to high % concentrations of chlorine and chlorine-based compounds. For more information on chlorine analysis, please click below buttons to visit our Chlorine Industry diagram webpage and each measurement point.