Extraction of Thiophene or Pyridine from n-Heptane Using Ionic Liquids. Gasoline and Diesel Desulfurization

Ind. Eng. Chem. Res., 2011, 50 (4), pp 2296–2306

Extraction of Thiophene or Pyridine from n-Heptane Using Ionic Liquids. Gasoline and Diesel Desulfurization

Karolina Ke¸dra-Krolik, Mutelet Fabrice*, and Jean-Noel Jaubert

mutelet@ensic.inpl-nancy.fr

Laboratoire Reactions et Genie des Procedes, Nancy-Universite, 1 rue Grandville, BP 20451 54001 Nancy, France

Abstract

Authors investigate the possible use of ILs as solvents for two separation problems frequently encountered in petroleum industry: {aromatic sulfur compound + aliphatic hydrocarbon} or {nitrogen compound + aliphatic hydrocarbon}.

They focus on three ILs: 1-ethyl-3-methylimidazolium thiocyanate, 1,3-dimethylimidazolium methylphosphonate, and tris-(2-hydroxyethyl)-methylammonium-methylsulfate. Part 1 of the article studies new three ternary systems with a view to defining the capacity of proposed ILs as solvents for extraction of sulfur and nitrogen containing organic compounds from aliphatic hydrocarbons. The second section of the article presents results of extraction of synthetic fuels - model gasoline and model diesel by the use of selected ILs. The influence of extraction time or temperature as well as three stepped procedure using each time a fresh portion of ILs on the final fuel contamination was investigated.

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