Petroleum Products QC

Field method – Aniline Solubility method for Aromatics in Naphtha Following properties of Aniline has been used to derive a simple field method to determine Aromatics content in naphtha. The aniline point is useful as an aid in the characterization of pure hydrocarbons and in the analysis of hydrocarbon mixtures. Aromatic hydrocarbons   exhibit the lowest, and paraffins the highest values. Cycloparaffins and olefins exhibit values that lie between those for paraffins and aromatics. In homologous series the aniline points increase with increasing molecular weight. Although it occasionally is used in combination with other physical properties in correlative methods for hydrocarbon analysis, the aniline point is most often used to provide an estimate of the aromatic hydrocarbon content of mixtures. Field Method: 1.           Scope:- 1.1          The method is studied for Naphtha Samples having, a)    Aromatics = Max 22% Vol b)    Naphthenes = Max 40% Vol c)  

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Aniline Point fundamentals and Hydrocarbons analysis The article gives fundamentals of Aniline and aniline point in hydrocarbon analysis.   This is useful leading to the term “Patel’s aniline solubility Constant” – applied in determining Aromatics quantitatively  in hydrocarbons product in simple field test methods. R J Patel Petroleumqc Blogger Profile   Aniline is a common organic compound with the formula C 6 H 5 NH 2 , having an amino group attached to a phenyl group. It is the prototypical aromatic amine. ANILINE is a yellowish to brownish oily liquid with a musty fishy s weet, amine-like odor detectable at 0.6 to 10 ppm.  Its Melting point -6°C; boiling point 184°C; flash point 76°C. Denser than water (8.5 lb / gal) and slightly soluble in water.   Vapors are heavier than air. Toxic by skin absorption and inhalation. Produces toxic oxides of nitrogen during combustion. In purest form, it is almost colourless, It becomes brown in the air or