Process for recovering secoisolariciresinol diglycoside from de-fatted flaxseed
AssigneeWiley Organics, Inc.
InventorsThomas A. Dobbins, David B. Wiley
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Abstract
A process for extracting secoisolariciresinol diglycoside (SDG) from de-fatted flaxseed is described. The process comprises contacting defatted flaxseed with an extraction solvent of acetone and water, extracting the de-fatted flaxseed with the extraction solvent to extract SDG-containing compounds, removal of solvents, followed by alkaline hydrolysis of the extract to liberate free SDG or its salts.
Claims18
A process for extracting secoisolariciresinol diglycoside (SDG) from de-fatted flaxseed comprising:
- (a) contacting defatted flaxseed with an extraction solvent comprising acetone and water at proportions ranging from about 35% acetone/65% water to about 65% acetone/35% water;
- (b) extracting said de-fatter flaxseed with the extraction solvent to extract SDG into said extraction solvent;
- and
- (c) separating residual solids from the SDG-containing extract.
A process for preparing a secoisolariciresinol diglycoside (SDG) concentrate from de-fatted flaxseed comprising:
- (a) extracting de-fatted flaxseed with an extraction solvent comprising acetone and water at proportions ranging from about 35% acetone/65% water to about 65% acetone/35% water to obtain an SDG-containing extract;
- (b) separating residual solids from the SDG-containing extract;
- (c) removing acetone to provide an acetone stripped extract;
- (d) lowering the pH of the acetone stripped extract to precipitate SDG;
- (e) separating precipitated SDG from the acetone stripped extract;
- (f) subjecting the precipitated SDG in an aqueous slurry to hydrolysis to liberate free SDG;
- and
- (g) recovering the free SDG from the aqueous slurry.
Dependencies are inferred from the claim text.