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Extraction of safrole from essential oils with ionic liquids
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Orientador(es)
Resumo(s)
In this study, new experimental results on liquid-liquid equilibria (LLE) in the
binary systems of safrole, an organic aromatic compound and six diferent ionic liquids:
trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)imide [P6:6:6:14][NT f2],
trihexyl(tetradecyl)phosphonium tricyanomethanide [P6:6:6:14][T CM], 1-dodecyl-3-
methylimidazolium bis(trifluoromethylsulfonyl)imide [DoMIM]][NT f2], octyltriethylammonium
bis(trifluoromethylsulfonyl)imide [N8:2:2:2][NT f2], 1-(2-methoxyethyl)-
1-methylpiperidinium trifluorotris(perfluoroethyl)phosphate [COC2mP IP ][FAP ] and
1-(2-methoxyethyl)-1-methylpyrrolidinium trifluorotris(perfluoroethyl)phosphate
[COC2mP YR][FAP ] have been investigated. The experimental values presented have
been determined using a dynamic method, which is based on disappearance of turbidity
in slowly heated solution. All samples have been placed in a glass cell and sealed with a
rotaflow needle valve at atmospheric pressure. The cells were immersed in a water bath.
All mixtures were stirred and slowly heated to obtain homogenous system. In this work,
the extraction performance of ionic liquids in the removal of compounds from sassafras
oil has been studied. The investigated ionic liquids are phosphonium, imidazolium,
ammonium, piperidinium and morpholinium based coupled with different anions.
The anions are bis(trifluoromethylsulfonyl)imide [NT f2], tricyanomethanide [TCM],
trifluorotris(perfluoroethyl)phosphate [FAP], dicyanamide [DCA], thiocyanate [SCN],
tosylate [TOS], trifluoroacetate [TFA], ethylsulfate [EtSO4], methylsulfate [CH3SO4] and
acetate [AcO].
Mixtures with the supplied oil and each of the following ionic liquids: [P6:6:6:14][NT f2],
[P6:6:6:14][T CM], [DoMIM][NT f2] and [N8:2:2:2][NT f2] were made. The mixtures were
stirred while the composition was slowly varied, at room temperature. There were no
miscibility gaps detected in any of the previously mentioned systems.
Descrição
Palavras-chave
Safrole Sassafras oil Ionic liquids Liquid-Liquid Equilibria Liquid-Liquid Extraction