Abstract
The extraction of sapucaia (Lecythis pisonis) nut oil (SNO) using subcritical propane (SPE) and supercritical CO2 (with ethanol as co-solvent; scCO2) as solvent was investigated and compared with the conventional (Soxhlet) extraction. Extraction with scCO2 was performed at 333K and 20MPa while the SPE extractions were carried out in different conditions to investigate the effects of temperature (293–333K) and pressure (2–10MPa) on the oil yield and the chemical compositions of the products. Results show that SPE allowed a fast extraction with a higher yield (46.22%) obtained at 333K and 10MPa, representing 93% efficiency compared to Soxhlet. Only temperature had significant (p<0.05) effect on the extraction yield. SPE yielded the oils with highest values of polyunsaturated fatty acids (∼36%). Stability to oxidation ranges from 6.53 to 11.17h. The major triacylglycerols present in SNO are OOO, SOO, POO, PLO, and POS.
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