Application of molecular sieves in the fractionation of lemongrass oil from high-pressure carbon dioxide extraction

AUTOR(ES)

Paviani, L., Pergher, S. B.C., Dariva, C.

FONTE

Brazilian Journal of Chemical Engineering

DATA DE PUBLICAÇÃO

2006-06

RESUMO

The aim of this work was to study the feasibility of simultaneous process of high-pressure extraction and fractionation of lemongrass essential oil using molecular sieves. For this purpose, a high-pressure laboratory-scale extraction unit coupled with a column with four different stationary phases for fractionation: ZSM5 zeolite, MCM-41 mesoporous material, alumina and silica was employed. Additionally, the effect of carbon dioxide extraction variables on the global yield and chemical composition of the essential oil was also studied in a temperature range of 293 to 313 K and a pressure range of 100 to 200 bar. The volatile organic compounds of the extracts were identified by a gas chromatograph coupled with a mass spectrometer detector (GC/MS). The results indicated that the extraction process variables and the stationary phase exerted an effect on both the extraction yield and the chemical composition of the extracts.

Documentos Relacionados

• Inactivation of Geobacillus stearothermophilus Spores by High-Pressure Carbon Dioxide Treatment
• Modeling the high-pressure behavior of binary mixtures of carbon dioxide+alkanols using an excess free energy mixing rule
• Quantitative extraction of amphotericin B from serum and its determination by high-pressure liquid chromatography.
• High-pressure transformations in xenon hydrates
• High-pressure liquid chromatographic assay of ceftizoxime with an anion-exchange extraction technique.