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Licensed Unlicensed Requires Authentication Published by De Gruyter July 6, 2022

Synthesis of aluminium alkylbenzene sulfonate and its behavior as a flow improver for crude oil

Zhichao Zhou, Wangyuan Zhang, Sanbao Dong, Jie Zhang and Gang Chen

Abstract

Low-molecular flow improvers for crude oil are becoming increasingly important chemical agents for crude oil production in oil fields. In this work, three alkyl benzene sulfonates were synthesized and evaluated as flow improvers for crude oil. The results show that the three flow improvers have an effect on L8401 crude oil (heavy oil). Among them, aluminium dodecylbenzene sulfonate (AlDBS) has the best effect as it reduces the viscosity rate by more than 80%. After adding 900 mg/L AlDBS, the freezing point is lowered by 15 °C. The crude oil flow improvement was proven with microphotographs. The co-crystallization behavior after addition of the agent interacts with the saturated hydrocarbons in the crude oil, which is the reason for lowering the freezing point of crude oil. Moreover, infrared spectroscopy and differential scanning calorimetry analysis (DSC) were used to illustrate the interaction mechanism between low-molecular flow improvers for crude oil and the components in crude oil.


Corresponding author: Dr. Gang Chen, Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields, Xi’an Shiyou University, Xi’an, Shaanxi, 710065, China; and State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China, E-mail:

Funding source: Youth Innovation Team of Shaanxi University

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 51974252

Funding source: Natural Science Basic Research Plan in Shaanxi Province of China

Award Identifier / Grant number: 2020JQ-775

Funding source: Xi’an Shiyou University

Award Identifier / Grant number: YC19113078

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The work was supported financially by the Youth Innovation Team of Shaanxi University, the National Natural Science Foundation of China (51974252), the Natural Science Basic Research Plan in Shaanxi Province of China (2020JQ-775), and Postgraduate Innovation Fund Project of Xi’an Shiyou University (YC19113078). We also thank for the work of Modern Analysis and Testing Center of Xi’an Shiyou University.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-04-15
Accepted: 2021-05-04
Published Online: 2022-07-06
Published in Print: 2022-07-26

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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