An ionic liquid (IL), 1-butyl-3-methylimidazolium perchlorate, [BMIM][ClO 4 ], is synthesized and used as a reducing agent to upgrade a selected heavy oil. The effects of [BMIM][ClO 4 ] on viscosity, density, SARA contents, elemental compositions, and molecular weight of the heavy oil are studied. The results show that the heavy oil treated with [BMIM][ClO 4 ] has reduction in viscosity and density. The results also indicate that the presence of [BMIM][ClO 4 ] significantly changes the composition of the heavy oil. Moreover, the effects of [BMIM][ClO 4 ] on the interfacial tension (IFT) of oil–water and oil recovery are tested. Results shows that [BMIM][ClO 4 ] can improve the mobility of heavy oil by reducing the IFT of oil–water and increase the recovery factor by 79.94%.
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Saaid et al. (2014) studied this question.
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