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Demulsification of Heavy Crude Oil Emulsions Using Ionic Liquids

2013; American Chemical Society; Volume: 27; Issue: 10 Linguagem: Inglês

10.1021/ef302008d

1520-5029

Elisângela Barboza da Silva, Denisson Santos, Douglas Alves, Milson dos Santos Barbosa, Regina C. L. Guimarães, Bianca M. S. Ferreira, Ricardo A. Guarnieri, Elton Franceschi, Cláudio Dariva, Alexandre F. Santos, Montserrat Fortuny,

Innovative Microfluidic and Catalytic Techniques Innovation

The use of ionic liquids (ILs) as demulsifiers of water-in-crude oil emulsions represents a new field of study. The main purpose of this work is to investigate the effect of five ILs, [C4mim]+[NTf2]−, [C8mim]+[NTf2]−, [C12mim]+[NTf2]−, [C4py]+[NTf2]−, and [C8mim]+[ [OTf]−, and a set of operation parameters on the demulsification process, including the heating type (conventional and microwave), IL concentration (0.74–8.9 μmol/g), effect of alkyl chain length, and effect of cation and anion type on demulsification efficiency. The results indicated that the demulsification was favored when more hydrophobic ILs and longer cation alkyl chains were employed, such as [C12mim]+[NTf2]−, reaching values close to 92% of water removal. Moreover, the joint use of microwaves and hydrophobic ILs allowed us to maximize the demulsification efficiency.