Optimization and kinetic study of biodiesel production through esterification of oleic acid applying ionic liquids as catalysts was written by Roman, Fernanda F.;Ribeiro, Antonio E.;Queiroz, Ana;Lenzi, Giane G.;Chaves, Eduardo S.;Brito, Paulo. And the article was included in Fuel in 2019.Safety of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate The following contents are mentioned in the article:
In this study, 1-methylimidazolium hydrogen sulfate, [HMIM]HSO4, ionic liquid, was successfully applied as a catalyst in the biodiesel production through the esterification reaction of oleic acid with methanol. A response surface methodol. (RSM) known as Box-Behnken Design (BBD) was applied to optimize the main exptl. reaction conditions, using a set of 27 experiments This optimization was based on the maximization of both the conversion of oleic acid and the Fatty Acid Me Esters (FAME) content of the obtained biodiesel samples. It was concluded that the two most relevant parameters for both the conversion and the FAME content were the molar ratio between oleic acid and methanol and the catalyst dosage. Accordingly to the model, the optimum condition for the maximum conversion was determined as being 8 h, 110 ± 2 °C, 15:1 M ratio methanol/oleic acid and a catalyst dosage of 15 wt%, resulting in a 95% conversion and for the maximum FAME content were 8 h, 110 ± 2 °C, 14:1 M ratio and a catalyst dosage of 14 wt%, leading to a FAME content of 90%. The kinetics of the esterification reaction was also evaluated, and the exptl. results were well described using a third-order reaction model. The kinetic parameters were exptl. determined, and the value of the activation energy was 6.8 kJ/mol and the pre-exponential factor was 0.0765 L2.mol-2.min-1 confirming that the ionic liquid, [HMIM]HSO4, is a good alternative for replacing traditional catalysts for biodiesel production through esterification reaction. This study involved multiple reactions and reactants, such as 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4Safety of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate).
1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Imidazole based anticancer drug find applications in cancer chemotherapy. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC).Safety of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem