Process for recovery and purification of saponins and sapogenins from quinoa (Chenopodium quinoa)
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United States of America Patent
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Mar 12, 2002
Grant Date -
Dec 27, 2001
app pub date -
Apr 16, 1999
filing date -
Apr 17, 1998
priority date (Note) -
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Abstract
A process for commercial extraction of saponins from quinoa, and optionally for the formation of corresponding sapogenins. The saponin extraction process comprises contacting a saponin-containing part of a quinoa plant with an aqueous alcohol solution containing an alcohol selected from the group consisting of methanol and ethanol to form a saponin-containing solution and an extracted solid residue, removing the alcohol from the saponin-containing solution to leave a saponin-containing aqueous solution, and evaporating water from the saponin-containing aqueous solution to produce a saponin-containing product. The conversion to sapogenins involves obtaining a solution of saponins in an aqueous alcohol, adding a strong acid to the solution to hydrolyze the saponins to form corresponding sapogenins that precipitates out of the solution as a precipitate, recovering the precipitate, and decolorizing the precipitate by forming a slurry of the precipitate with a solution of an aqueous base to form a decolorized sapogenin product.
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