4.5 Article

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

Journal

FOOD AND BIOPRODUCTS PROCESSING
Volume 91, Issue C4, Pages 303-309

Publisher

INST CHEMICAL ENGINEERS
DOI: 10.1016/j.fbp.2012.11.007

Keywords

Coffee; Green tea; Caffeine; Ethyl lactate; Accelerated solvent extraction

Funding

  1. Ministerio de Ciencia e Innovacion of Spain (joined project Spain-Portugal) [PT2009-0010]
  2. Conselho de Reitores das Universidades Portuguesas (CRUP) - Integrated project Portugal - Spain [E-95/10]
  3. Consejo Superior de Investigaciones Cientfficas (CSIC) of Spain
  4. Fundacao para a Ciencia e Tecnologia - Portugal for a doctoral fellowship [SFRH/BD/45323/2008]
  5. Fundação para a Ciência e a Tecnologia [SFRH/BD/45323/2008] Funding Source: FCT

Ask authors/readers for more resources

This 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 degrees 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 (approximate to 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. (C) 2012 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

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