Article ID Journal Published Year Pages File Type
231191 The Journal of Supercritical Fluids 2011 6 Pages PDF
Abstract

In this paper the use of supercritical CO2 technology is studied as a means of streamlining olive husk extraction so as to obtain extracts with a high content of valuable compounds and without any residual solvent. Response surface methodology (RSM) was used to evaluate how pressure (25–35 MPa) and temperature (313–333 K) affected oil yield and the extract quality (expressed in terms of tocopherol, carotenoids and chlorophyll concentration). The effect of using ethanol as a cosolvent was also evaluated. Kinetic parameters were obtained for their use in the design and optimization of the extraction process and for scale-up steps in particular. Optimal extraction conditions were determined taking both maximum yield and recovery criterion into account. In these conditions the valuable compounds were from two to four times more concentrated than in classical hexane extraction.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Supercritical technology is studied as a means of streamlining olive husk extraction. ► Response Surface Methodology was used to obtain optimal extraction conditions. ► Valuable compounds were from 2 to 4 times more concentrated than in hexane extraction.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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