Autor(es)

Vicentini-Polette, Carolina Medeiros ; Yamada, Beatriz Satie ; Ramos, Paulo Rodolfo ; da Silva, Marta Gomes ; de Oliveira, Alessandra Lopes

• Tipo de documento: Artigo Científico
• Fonte: GLOBAL CHALLENGES; v. 8, n. 11, p. 17-pg., 2024-08-05.

Resumo

This research explores green-technology alternatives to extract vegetable oils as alternatives to hexane, a non-renewable solvent, focussing on sunflower oil. It compares pressurized liquid extraction (PLE) with ethanol and supercritical fluid extraction (SFE) with CO2. Both processes aim to maximize oil yield, tocopherol content (alpha, beta, gamma, and delta), fatty acid profile (FA), and triacylglycerol (TAG) composition. Results show that SFE at 32 MPa achieves an 87.58% oil recovery, while PLE at 84 degrees C achieves 93.93%. PLE with ethanol extracts polar minority compounds along with the oil due to its higher temperature, favoring extraction. The total tocopherol content is 91.17 mg/100 g of oil in optimized SFE conditions, with alpha-tocopherol extraction influenced by temperature, gamma and delta-tocopherol by pressure. PLE yields 83.16 mg/100 g of oil in tocopherols influenced less by process variables. The fatty acid (FA) profile do not vary in the oils obtained from different processes or based on the variables within each process, with linoleic and oleic acids being the most abundant. Similarly, triacylglycerols (TAGs) C54:5 and C54:6 are predominant. The optimization of SFE and PLE processes indicates a strong potential for using green solvents in the extraction of tocopherol-rich sunflower oil. (AU)

• Processo FAPESP: 18/18024-7 - Aumento de escala de um equipamento de extração com líquido pressurizado que opera em batelada - estudo dirigido para produção eficiente de tintura de maracujá e óleo de soja usando solventes verdes
• Beneficiário: Alessandra Lopes de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Regular