Vegetable Oils as Alternative Solvents for Green Oleo-Extraction, Purification and Formulation of Food and Natural Products

Abstract

Since solvents of petroleum origin are now strictly regulated worldwide, there is a growing demand for using greener, bio-based and renewable solvents for extraction, purification and formulation of natural and food products. The ideal alternative solvents are non-volatile organic compounds (VOCs) that have high dissolving power and flash point, together with low toxicity and less environmental impact. They should be obtained from renewable resources at a reasonable price and be easy to recycle. Based on the principles of Green Chemistry and Green Engineering, vegetable oils could become an ideal alternative solvent to extract compounds for purification, enrichment, or even pollution remediation. This review presents an overview of vegetable oils as solvents enriched with various bioactive compounds from natural resources, as well as the relationship between dissolving power of non-polar and polar bioactive components with the function of fatty acids and/or lipid classes in vegetable oils, and other minor components. A focus on simulation of solvent-solute interactions and a discussion of polar paradox theory propose a mechanism explaining the phenomena of dissolving polar and non-polar bioactive components in vegetable oils as green solvents with variable polarity.

Essential Oils as Feed Additives—Future Perspectives

“…Lipid-based particles include some vegetable oils and liposomes. Vegetable oils are a mixture of triglycerides (major components) and minor components that account for less than 5%, such as glycerolipids (as mono- and di-glycerides), phospholipids, and non-glycerolipids, including sterols, tocopherols, tocotrienols, free fatty acids, vitamins, pigments, proteins, phenolic compounds, and water [ 134 ]. Vegetable oils with long-chain triglycerides, such as corn oil, nut oil, and canola oil, can be applied as lipid-based particles due to the small digestion rate [ 135 ].…”

Effect of Environmentally Friendly Oil on Ni-Ti Stent Wire Using Ultraprecision Magnetic Abrasive Finishing

“…Processing oils are essential elements of the finishing or grinding process, reducing the friction and high temperatures that occur between the surface finish of the sample and the abrasive particles [21]. During the UPMAF process, the mechanical friction between the relative motion of the sample and abrasive particles can cause microcracks on the finished surface.…”

Técnicas emergentes de extracción de β-caroteno para la valorización de subproductos agroindustriales de la zanahoria (Daucus carota L.): una revisión

“…Entre algunos de los efectos más importantes para destacar, según los resultados reunidos en la Tabla 7 son: Solvente: la viscosidad y tensión superficial del solvente son inversamente proporcionales a la efectividad del fenómeno de cavitación (Vernès et al, 2020). En los valores de la Tabla 7 se puede observar que la sustitución de solventes por aceites vegetales no muestra un efecto significativo en la degradación del extracto, pues la degradación ultrasónica del β-caroteno es típicamente lenta en comparación con otros solventes aromáticos más volátiles (Varón et al, 2017). Temperatura de extracción: causa una variación en las propiedades del solvente como su viscosidad, mejorando la solubilidad y promoviendo el fenómeno de cavitación y, por otro lado, facilita la difusión y la transferencia de masa (Vernès et al, 2020).…”