Abstract
Photon correlation spectroscopy was used to determine the threshold concentrations of n-heptane for phase transitions of asphaltenes in model systems for two types of oil. The rheological properties exhibited by high-paraffin oil in the asphaltene aggregation process were analyzed. It was shown that the presence of resin and paraffi n fractions in oil prevents phase transition of asphaltenes at the threshold concentration of n-heptane for the model system, so that a higher precipitant concentrations is required for aggregation of asphaltenes and formation of oil sludge.
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Original Russian Text © E.V. Mal’tseva, A.M. Gorshkov, L.V. Chekantseva, L.V. Shishmina, N.V. Yudina, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 9, pp. 1401–1406.
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Mal’tseva, E.V., Gorshkov, A.M., Chekantseva, L.V. et al. Influence of aggregation of asphaltenes on the rheological properties of oil. Russ J Appl Chem 86, 1370–1375 (2013). https://doi.org/10.1134/S1070427213090096
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DOI: https://doi.org/10.1134/S1070427213090096