Abstract
Plant-based lipophilic compounds such as edible oils, phytochemicals, flavors, fragrances and colours are valuable products in the food, pharmaceutical and chemical industry. Extraction is one of the key processing steps in recovering and purifying lipophilic ingredients contained in plant- based materials. Lipophilic compounds are found in the cells of oil bearing plant seeds. Solvent extraction is the most common commercially used extraction method for low oil content materials. Solvent extraction has more extractability than existing commercial methods, but it also passes serious limitations and environmental issues. The Environmental Protection Agency has been much concerned regarding safety and environmental emissions associated with hexane usage in the solvent extraction process. Bio-solvents resulting from renewable raw materials and in particular from the biomass may become a solution of the existing problem. But the existing conventional extraction methods cannot respond to such solvent and hence need for new novel “Green” extraction technology having potential to overcome all limitations of existing technologies. This review will discuss the various possible novel eco-friendly extraction methods, their scientific concepts, principles, challenges, limitations and technological effort needed for successful implementation at the production scale.
Highlights
Obtained bioactive compounds such as edible oils, phytochemicals, flavors, fragrances and colors are gaining much interest in food and cosmetic industries because of their therapeutic effect over synthetic ones
Guderjan et al [33] reported that the recovery of phytosterols from maize increased by 32.4% and isoflavonoids from soybeans increased by 20-21% when Pulsed-electric field extraction (PEF) was used as a pretreatment process before conventional extraction
Traditional solid-liquid extraction methods require a large quantity of solvent and are time consuming
Summary
Obtained bioactive compounds such as edible oils, phytochemicals, flavors, fragrances and colors are gaining much interest in food and cosmetic industries because of their therapeutic effect over synthetic ones. India has become the largest importer of edible oil as a country had imported around 11.8 million MT (about 60% of total need) during 2013-14 [1]. An oil body is a unit of storage lipophilic compounds called lipids and is found in the cells of oil bearing plant seeds used for oil consumption such as peanut, soybean, and olive seeds. The traditional plant oil extraction methods include expeller pressing or mechanical pressing and organic solvent extraction. The alcohols are used as a solvent for replacement of conventional petroleum solvents during solid-liquid extraction of lipophilic compounds These alternative solvents often result in less recovery during conventional extraction process. There is a great need to improve the understanding of extraction mechanism, to remove technical barriers, to improve the design and scale up of the novel extraction systems for better industrial applications
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
