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Title

Extraction of caffeine from natural matter using a bio-renewable agrochemical solvent

AuthorsVillanueva, D. ; Luna, Pilar ; Manic, Marina S.; Najdanovic-Visak, V.; Reglero, Guillermo ; Fornari, Tiziana
KeywordsGreen tea
Caffeine
Ethyl lactate
Accelerated solvent extraction
Coffee
Issue Date2013
PublisherElsevier
CitationFood and Bioproducts Processing 91(4): 303-309 (2013)
AbstractThis paper reports experimental data on the pressurized liquid extraction of caffeine from green coffee beans and green tea leaves using ethyl lactate (ethyl 2-hydroxy-propanoate). This solvent is a new bio-renewable agrochemical solvent, naturally produced by fermentation from corn derived feedstock, which has been recently considered as a very suitable and environmental benign solvent for food industrial applications. Static extraction assays (one step during 10 min) were carried out in an Accelerated solvent extraction (ASE) system at three different extraction temperatures, namely 100, 150 and 200 C. Extraction yield and caffeine recovery were determined and compared with those obtained when using other liquid solvents, such as ethyl acetate or ethanol. High recovery of caffeine (≈60%) was found in the extracts produced using ethyl lactate, which demonstrates the potential use of this green solvent for the extraction of caffeine from different vegetable sources. © 2012 The Institution of Chemical Engineers.
URIhttp://hdl.handle.net/10261/99989
DOI10.1016/j.fbp.2012.11.007
Identifiersdoi: 10.1016/j.fbp.2012.11.007
issn: 0960-3085
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