Influence of Processing Conditions on the Properties of High Paraffin Oil and Sediment Composition

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Abstract

The influence of ultrasonic treatment, a polymer additive, and their combined effect on the structural and rheological properties of high paraffin, low-resin oil and the composition of separated sediments is studied. The oil was processed in the ultrasonic field (with the field intensity of 6 W/cm2, the frequency of 22 kHz, and the time of 1–10 min). The sedimentation process was carried out at an ambient temperature of 30°С and a coldfinger temperature of 5°С. A Brookfield DV-III ULTRA rotary viscometer was used to determine the viscosity-temperature parameters of the oil. Ultrasonic treatment for 1 min and a polymer additive (0.05 wt%) leads to a decrease in the viscosity by a factor of 5 and in pour point by 8°C. The introduction of the additive and the complex effect contribute to changes of the molecular weight distribution of n-alkanes in the sediments, viz. the second distribution maximum shifts to the region of higher molecular weight components and the concentration of n-alkanes ∑С17Н36–С33 Н68 increases.

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About the authors

G. I. Volkova

Institute of Petroleum Chemistry of Siberian Branch of the Russian Academy of Sciences; National Research Tomsk State University

Author for correspondence.
Email: galivvol@yandex.ru
Russian Federation, Tomsk; Tomsk

D. A. Zubarev

Institute of Petroleum Chemistry of Siberian Branch of the Russian Academy of Sciences

Email: zubarevdaniilandreevich@gmail.com
Russian Federation, Tomsk

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Supplementary files

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2. Fig. 1. Effect of RCD time on oil viscosity at 5°C

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3. Fig. 2. Effect of PP additive concentration on oil viscosity at different temperatures

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4. Fig. 3. Forward and reverse oil flow curves at 5°C

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5. Fig. 4. Molecular weight distribution of n-alkanes in oil sludge oils

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