Esterification of oleic acid in [Bmim]BF4/[Hmim]HSO4 + TX-100/cyclohexane ionic liquid microemulsion was written by Jiang, Dongyu;Chen, Li;Wang, Aili;Yan, Zongcheng. And the article was included in RSC Advances in 2014.COA of Formula: C10H20N2O4S The following contents are mentioned in the article:
Esterification of oleic acid was carried out in a 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4)/Triton X-100 + 1-hexyl-3-methylimidazolium hydrogen sulfate ([Hmim]HSO4)/cyclohexane microemulsion. A pseudo ternary phase diagram of the designed systems was drawn to investigate the phase behavior of the microemulsion, with the surfactant [Hmim]HSO4 acting as a catalyst. The effects of various reaction parameters were explored. The results showed that the maximum yield of lauryl oleate reaches 91.17% and its selectivity reaches 98.55% under optimum reaction conditions. The reaction was carried out with 8 wt% catalyst at 373 K for 6 h. The molar ratios of [Bmim]BF4 to the surfactant and of oleic acid to lauryl alc. were 0.24 and 0.2, resp. Comparison reactions between different alcs. and oleic acid were also performed, and the results showed that long alkyl chain alcs. promote the reaction rate. UV-vis absorption spectra demonstrated that the generated water enters the [Bmim]BF4 microdomain of the ionic liquid microemulsions. A possible mechanism of the reaction was also presented. All the results indicate that the [Bmim]BF4/TX-100 + [Hmim]HSO4/cyclohexane microemulsion is a very efficient catalyst system for esterification reactions. This study involved multiple reactions and reactants, such as 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4COA of Formula: C10H20N2O4S).
1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.COA of Formula: C10H20N2O4S
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem