TOTAL's correlation uses aniline point and refractive index. Typically, an aniline point higher than 200 ☏ (93 ☌) indicates paraffinicity, and an aniline point lower than 150 ☏ (65 ☌) indicates aromaticity.Īniline point is used in some correlations to estimate the aromaticity of gas oil and light stocks. Naphthenes and olefins show values that lie between those for paraffins and aromatics. The aniline point increases with paraffinicity and decreases with aromaticity. The test senses solubility via a light source that penetrates through the sample. The mixture is then cooled, and the temperature at which the mixture becomes suddenly cloudy is the aniline point. Aniline point is the minimum temperature for complete solubility of an oil sample in aniline.ĪSTM D611 involves heating a 50/50 mixture of the feed sample and aniline until there is only one phase. Aniline is used to determine the aromaticity of oil products, including FCC feedstocks. When used as a solvent, it is selective to aromatic molecules at low temperatures, paraffins and naphthenes at higher temperatures.
In Fluid Catalytic Cracking Handbook (Fourth Edition), 2020 4.2.3 Aniline pointĪniline is an aromatic amine (C 6H 5NH 2).
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