Determination of the Kovach retention indices of n-alkanes in the middlestyllate fraction of oil from various fields
The research studies the carbohydrate composition of the average distillate fraction of oil of three different oil fields using the method of gas-liquid chromatography; according to the GC analysis more than 26 n-alkanes have been identified and it was found that the oil of different fields differ mainly in quantitative content of alkanes. Various chromatographic characteristics of the average distillate fraction were identified, including indices of retention of forging; various methods for calculating the indices of forging were considered. The authors have investigated the dependence of the indices Kovacs from various characteristics and the method of least squares and calculated the parameters of the linear correlations of the indices Kovacs to the structural features and properties of n-alkanes; the obtained equation with high values of correlation coefficients ( r > 0,99) can be used in practice for the identification and calculation of the various chromatographic characteristics of a homologous series of n-alkanes, determining the operational properties of the fractions.