Virgin coconut oil (VCO) was used as co-extractant with supercritical carbon dioxide (scCO2) extraction for obtaining xanthones from mangosteen pericarp (MP) without organic co-solvents. In each experiment, 120g of dried MP that had median particle sizes of 0.85mm was used. Extraction of MP with 40% VCO co-extractant using scCO2 (1.08kg/h) for 420min at 430 bar and 70°C gave α-mangostin (32.2mg/g), γ-mangostin (7.2mg/g), xanthones (28.2mg/g) in extract and an extraction yield of 31%. The role of VCO is that it promotes dissolution of xanthones and mass transfer into the scCO2 phase as elucidated with the Pardo-Castano model. The Lentz equation was generalized in terms of (P, T, %VCO, ÏCO2) to correlate all extraction curve data to within 7.4% and to estimate extraction yield crossover regions. Xanthones can be separated from mangosteen pericarp with VCO and scCO2 extraction without organic...

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