The RSN of a demulsifier is a measure of its solubility properties. The RSN test method determines the hydrophile-lipophile balance of the demulsifier under test by means of a water titration. The RSN is the volume of water (in millilitres) necessary to produce a persistent turbidity in the given solvent system. We have developed a novel method for determining the RSN of a demulsifier. This method offers substantial reductions in the risks to health, safety and the environment that was inherent in historic tests.
Historic tests typically involved hazardous solutions of benzene and 1,4-dioxane. Our novel method utilises a solution of dimethylisosorbide (75%), butyl diglycol (20%) and xylene (5%), a much safer and environmentally friendly test method with the results generated being directly comparable to those generated by the historical method.
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