A carbonium pseudo ionic liquid with excellent extractive desulfurization performance

Abstract

in Wiley Online Library (wileyonlinelibrary.com).Lewis hard acid AlCl 3 was softened by some butyl halides forming highly polarized liquids. These liquids are similar to the ionic liquids (ILs) with metallic complex anion and varying composition, and thus termed here as carbonium pseudo ILs (CPILs). The CPILs, that is, t-C 4 H 9 Cl-AlCl 3 , n-C 4 H 9 Cl-AlCl 3 , and t-C 4 H 9 Br-AlCl 3 , show very strong desulfurization activity for various thiophenic compounds like 3-methylthiophene, benzothiophene, and dibenzothiophene. The above thiophenic compounds can be removed completely from model oils within 20 min by a very small amount of CPILs reactive extractant. The extractive mechanism is deemed as an acid-base complexation along with alkylation of the thiophenic compounds, and the Lewis acidity comes from both carbonium ion (borderline acid) and the dissolved AlCl 3 (hard acid). The t-C 4 H 9 Cl-AlCl 3 shows good selectivity for three thiophenic compounds even in toluene-containing system. Further, some CPILs show satisfactory desulfurization performance for the model gasoline that mimics the composition of real one.Two alkyl halides, namely t-butyl chloride and n-butyl chloride, were used to soften hard acid AlCl 3 to explore their Figure 1. The three S-compounds in model oil.

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Hexacyanoferrate‐based ionic liquids as Fenton‐like catalysts for deep oxidative desulfurization of fuels

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