In the oil production process, a large amount of generated oily sludge causes considerable pollution to the environment. In this paper, the oil sludge samples obtained from the Jidong oilfield in China are treated by the microemulsion system containing sodium dodecylbenzene sulfonate (SDBS) as a surfactant. The microemulsion system contains kerosene as the oil phase and an aqueous solution containing SDBS, n-butanol, and sodium chloride as the water phase. This study is focused on the effects of the system’s composition and treatment process on the efficiency of oil removal. The results show that when the volume ratio of kerosene to water is 1:1 and the weight concentrations of SDBS, n-butanol, and sodium chloride are 4.92%, 2.59%, and 3.94% respectively, the system provides the highest oil removal efficiency. When the initial sample mass is 10 g and the water content in the microemulsion is 100 mL, the treatment provides the removal of 79.3% of oil from the sludge. The oil removal efficiency is further optimized to 82.5% by treating the sludge at the temperature of 30°C for 2 h.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 96–99, November-December, 2021.
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Xu, H., Qiang, L., Wu, X. et al. Oil Sludge Treatment by a Microemulsion System Containing Sodium Dodecyl Benzene Sulfonate. Chem Technol Fuels Oils 57, 1000–1004 (2022). https://doi.org/10.1007/s10553-022-01337-z
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DOI: https://doi.org/10.1007/s10553-022-01337-z