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A new experimental investigation on upgrading of waxy crude oils by methacrylate polymers

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Abstract

Several methods have been used to reduce problems caused by wax precipitation during the production and/or transportation of waxy crude oil. Polymers are used to improve pour point and rheological behavior of waxy crude oils. In this work, the influence of the polymer inhibitors such as methacrylate polymers, as wax inhibitor, with different range of molecular weight and alkyl side chain carbons on the rheological behavior and pour point of two Iranian waxy crude oils were evaluated. Two Iranian waxy crude oils were selected on the basis of wax and asphaltene contents. The rheological behavior of these crude oils in absence and in presence of methacrylate polymer was studied. The rheological data cover the temperature range of–1 to 12°C. The results indicated that the performance of methacrylate polymer was dependent on the molecular weight, alkyl side chain carbons and the asphaltene content of crude oil. Methacrylate polymers with longer alkyl side chains than 18 carbons would perform best as wax inhibitors in two cases. Also, for crude oil with low asphaltene, higher molecular weight methacrylate polymer is the best flow improver and lower molecular weight methacrylate polymer showed good efficiency for crude oil with high asphaltene content.

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Authors and Affiliations

  1. Research Institute of Petroleum Industry (RIPI), P.O. Box 14665–1998, Tehran, I.R., Iran

    Taraneh Jafari Behbahani, Ali Akbar Miranbeigi & Khashayar Sharifi

Authors
  1. Taraneh Jafari Behbahani
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  2. Ali Akbar Miranbeigi
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  3. Khashayar Sharifi
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Correspondence to Taraneh Jafari Behbahani.

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The article is published in the original.

Published in Russian in Neftekhimiya, 2017, Vol. 57, No. 5, pp. 551–557.

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Jafari Behbahani, T., Miranbeigi, A.A. & Sharifi, K. A new experimental investigation on upgrading of waxy crude oils by methacrylate polymers. Pet. Chem. 57, 874–880 (2017). https://doi.org/10.1134/S0965544117100036

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