Procede de recuperation et de purification de saponines et de sapogenines provenant de quinoa (chenopodium quinoa)

Process for recovery and purification of saponins and sapogenins from quinoa (chenopodium quinoa)

Abstract

The invention relates to 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 (e.g. quinoa bran or seeds) with an aqueous alcohol solution containing an alcohol selected from 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 precipitate 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. The processes of the invention permit efficient saponin extraction, and sapogenin production, on a commercial scale using inexpensive materials and techniques.

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