A Highly Stable Soybean Oil-Rich Miscella Obtained by Ethanolic Extraction as a Promising Biodiesel Feedstock

Author(s)

Bueno-Borges, Larissa Braga ; de Camargo, Adriano Costa ; Sangaletti-Gerhard, Naiane ; Pereira dos Santos, Grasiela Cristina ; de Alencar, Severino Matias ; Shahidi, Fereidoon ; Bismara Regitano-d'Arce, Marisa Aparecida

• Document type: Journal article
• Source: JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY; v. 94, n. 8, p. 1101-1109, AUG 2017.
• Web of Science Citations: 1

Abstract

Soybean oil is industrially obtained upon hexane extraction. In biodiesel production, soybean oil is submitted to phospholipid removal in order to improve its quality before transesterification. An extraction process was employed to produce ethanolic oil-rich miscella, which can be directly transesterified to produce biodiesel without prior refining. We assessed the oxidative stability of the miscella and three other soybean oils, namely degummed, alkali-refined, and refined-bleached-deodorized (RBD) oil. In vitro antioxidant assays as well as the identification and quantification of tocopherols and isoflavones were also performed. Although hexane-extracted oils showed higher tocopherol contents than miscella, this latter sample and its direct biodiesel demonstrated superior stability in accelerated tests. Miscella also outperformed hexane-extracted oils in all in vitro assays. This behavior can be explained by the presence of phenolic compounds with higher affinity to ethanol than hexane, which was confirmed by the identification of isoflavones glycitein, genistein, and acetyldaidzin, found only in miscella. This study showed that the ethanolic extraction of soybean oil generated a highly stable lipid feedstock for biodiesel manufacture. (AU)

• FAPESP's process: 12/17683-0 - GAMMA RADIATION AS A TOOL FOR AGRO-INDUSTRIAL WASTES MICROBIOLOGICAL SAFETY AND ITS EFFECT ON THE ANTIOXIDANT PROPERTIES EVALUATED BY IN VITRO TESTS AND MODEL SYSTEMS
• Grantee: Adriano Costa de Camargo
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/00336-4 - Enzyme assited extraction of insoluble-bound phenolics from grape by-products: antioxidant and bioactivity potential
• Grantee: Adriano Costa de Camargo
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 16/01956-9 - 107th AOCS Annual Meeting & Expo
• Grantee: Marisa Aparecida Bismara Regitano d'Arce
• Support Opportunities: Research Grants - Meeting - Abroad
• FAPESP's process: 13/03650-6 - Application of chemical heterogeneous catalysts in the transesterification of soybean oil ethanolic miscellae
• Grantee: Marisa Aparecida Bismara Regitano d'Arce
• Support Opportunities: Regular Research Grants