English

Vol. 7 6, 2017 p 28-35

Pages

Article name, authors, abstract and keyword

28-35

Study of the wax crystallization temperature in oil in order to reduce the formation of asphalt-resin-paraffin deposits

Alexander Y. Lyapin a, Alexander V. Astakhov a, Yury P. Mikhalyov a

a Transneft North, JSC, 2/1, A. I. Zeryunov Avenue, Ukhta, 169313, Komi Republic, Russian Federation

DOI: 10.28999/2541-9595-2017-7-6-28-35

Abstract: The current state of the Russian oil industry is characterized by decrease in the quality of the raw material base. Particularly, in transportation of oil containing wax, the formation of asphalt-resin-paraffin deposits (ARPD) is a serious problem that causes complications in the operation of pipeline communications. The goal of the authors of this work was to carry out laboratory studies of oil transported along the main oil pipelines (MOP) Usa Ukhta and Ukhta Yaroslavl in order to determine the wax appearance temperature (WAT) and the temperature of mass crystallization of wax (TMCW), and compare the results with the oil pumping temperature and subsequent forecasting of the wax precipitation sites.
There is no current regulatory document that would regulate the procedure for measuring WAT, TMCW and consolidate the requirements for the accuracy of such a method. During the laboratory work, a photometric method was used to measure WAT in oil transported by Transneft North, JSC through Usa Ukhta, Ukhta Yaroslavl main oil pipelines, and the viscometric method to determine the TMCW. The obtained values are compared with the oil pumping temperature, and the sites of wax appearance and its mass deposition are predicted. Therefore, the dependence of the wax deposition on the wax appearance point and the oil pumping temperature on the sections of the main oil pipeline was determined.

Keywords: paraffins, asphalt, resin and paraffin deposits, wax precipitation, wax appearance point, mass crystallization, photometric method, viscometric method.

Reference for citing:
Lyapin A. Y., Astakhov A. V., Mikhalev Y. P. Study of the crystallization temperature of paraffins in oil in order to reduce the formation of asphalt-resin-paraffin deposits. Naukatekhnol. truboprov. transp. neftiinefteprod. = Science & Technologies: Oil and Oil Products Pipeline Transportation. 2017;7(6):2835.

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