In this work we investigated the enrichment of antioxidants buriti oil
(Mauritiaflexuosa Mart) adsorption process by supercritical. The adsorption was carried
out experimentally by the method of frontal analysis in columns packed with y-alumina
and 15, 20 e 25 MPa, 333 K, and flow of solvent QCO2 = 10,6 L/min, using an assembly
of double columns of 81 cm3, tested and approved for use as a cell adsorption. The oil
was buriti physic-chemically characterized according to the AOCS official methods and
found to comply with the data reported in the literature. The composition of methyl
esters was determined by gas chromatography (CG) and antioxidant activity by the
method of capture of free radicals (DPPH). The adsorbent was characterized by
fluorescence and x-ray diffraction, determining the particle size distribution, porosity
and surface area by BET in each experiment, a material balance was performed in the
adsorption column to calculate the mass of the adsorbed species in y-alumina in the
process of supercritical adsorption. The influence of pressure on supercritical adsorption
was investigated by examining the behavior of the isotherms. The Langmuir isotherm
was used to model the experimental data of adsorption. The experimental results show
an increased capacity adsorbent with higher pressures, showing a maximum of 90,9 ±
8,6 mg oil/g y-alumina, at 25 MPa. The adsorption supercritical buriti oil on γ-alumina
using carbon dioxide as solvent appears to be an alternative method for extracting
antioxidants from the includ carotenes.
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