What is meant by aniline point?
What is meant by aniline point?
: the lowest temperature at which aniline and a solvent (as gasoline) are completely miscible and which serves as an indication of the type of hydrocarbons present in the solvent, the content of aromatics being higher according as the temperature is lower.
How is aniline point measured?
Determination of aniline point Equal volumes of aniline and oil are stirred continuously in a test tube and heated until the two merge into a homogeneous solution. Heating is stopped and the tube is allowed to cool. The temperature at which the two phases separate out is recorded as aniline point.
What is the mathematical relation between aniline point and diesel index?
A7: Diesel index is an indication of the ignition quality of a diesel fuel. It can be determined by calculation from the specific gravity and the aniline point of the sample Diesel index = (Aniline point * °API) / 100.
What is the importance of determination of aniline point of oil?
Aniline point of a oil gives the indication of possible detoration of a rubber sealing, packaging etc. in contact with oil. The aromatic hydrocarbon has a tendency to dissolve certain type of rubber, so low aromatic content is desired for the oil.
What is the use of aniline point?
When used as a solvent, it is selective to aromatic molecules at low temperatures, paraffins and naphthenes at higher temperatures. Aniline is used to determine the aromaticity of oil products, including FCC feedstocks. Aniline point is the minimum temperature for complete solubility of an oil sample in aniline.
What are the uses of aniline?
Aniline, an organic base used to make dyes, drugs, explosives, plastics, and photographic and rubber chemicals.
What does high aniline point indicate?
Typically, an aniline point higher than 200 °F (93 °C) indicates paraffinicity, and an aniline point lower than 150 °F (65 °C) indicates aromaticity. Aniline point is used in some correlations to estimate the aromaticity of gas oil and light stocks.
What is the formula of aniline?
C6H5NH2
Aniline/Formula
Is used in aniline point determination?
Aniline point is the minimum temperature for complete solubility of an oil sample in aniline. ASTM D611 involves heating a 50/50 mixture of the feed sample and aniline until there is only one phase. The mixture is then cooled, and the temperature at which the mixture becomes suddenly cloudy is the aniline point.
What should be the aniline point of a good lubricant?
For high-aromatic products, such as aromatic extracts, the aniline point is around 20-40oC; for naphthenic base oils, 70-100oC depending on the degree of refining and viscosity; for Group I paraffinic base oil, 90 to 110oC; and for Group II-IV base oils, 100-130oC or higher.
What is the function of aniline point?
Aniline is used to determine the aromaticity of oil products, including FCC feedstocks. Aniline point is the minimum temperature for complete solubility of an oil sample in aniline. ASTM D611 involves heating a 50/50 mixture of the feed sample and aniline until there is only one phase.
Why aniline is basic in nature?
Aniline is an aromatic amine. The basicity of the aromatic amine is depending upon the availability of the lone pair. The higher the lone pair availability, the higher the donating ability of the lone pair as well as the accepted tendency of hydrogen ions. Due to this reason, aniline is less basic than methylamine.
Which is the best test method for aniline point?
Test Method A is suitable for transparent samples with an initial boiling point above room temperature and where the aniline point is below the bubble point and above the solidifi- cation point of the aniline-sample mixture. Test Method B, a thin-film method, is suitable for samples too dark for testing by Test MethodA.
How is the aniline point of oil determined?
Determination of aniline point Equal volumes of aniline and oil are stirred continuously in a test tube and heated until the two merge into a homogeneous solution. Heating is stopped and the tube is allowed to cool. The temperature at which the two phases separate out is recorded as aniline point.
What is the minimum temperature of an aniline point?
The aniline point of an oil is defined as the minimum temperature at which equal volumes of aniline (C.
What does a low aniline point in diesel mean?
Aniline being an aromatic compound freely mixes with aromatics; so a low aniline point indicates a low diesel index. Aniline In Pe troleum diesel, al so called petrol, diesel, or fossil diesel is the most common t ype of diesel fuel. I t
