Crude oil always contains salt, either dissolved in water droplets or in form of crystalline salt. Since salt contents can cause problems by forming precipitates, accelerating corrosion processes or catalyst degradation during the refining process, crude oil is undergoing a desalting process. By-product of this process is water of high salt concentrations up to 26 % of mostly NaCl (smaller amounts of CaCL2 and MgCL2), so-called brine. Brine, as a product of petrochemical industry, is a starting material in other industries, e.g. as refrigerating fluid, in water purification or de-icing processes. One of the quality criteria for the further use of brine is its TOC content.
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