Process for obtaining genistin malonate and daidzin malonate
AssigneeNestec S.A.
InventorsYvette Fleury, Daniele Magnolato
Life of this patent
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Abstract
Genistin and daidzin malonates are obtained by extracting ground soya bean with methanol or ethanol to obtain an extract. The extract is buffered to a pH of 6 to 9 and then extracted with a water-immiscible solvent. The aqueous phase is recovered, acidified to a pH of 2 to 5.4, and then extracted with a water-immiscible solvent. The organic phase is recovered, neutralized to a pH of 6.8 to 7.2, and the malonates are separated therefrom.
Claims19
A process for obtaining genistin malonate and daidzin malonate comprising:
- extracting ground soya bean with a solvent selected from the group of solvents consisting of methanol and ethanol to obtain an extract;
- buffering the extract with an aqueous buffer solution to obtain an aqueous solution having a pH of from 6 to 9;
- extracting the buffered aqueous solution with a water-immiscible organic solvent and recovering an aqueous phase therefrom;
- acidifying the recovered aqueous phase to a pH of from 2 to 5.4;
- extracting the acidified aqueous phase with a water-immiscible organic solvent and recovering an organic phase therefrom;
- neutralizing the recovered organic phase to a pH of from 6.8 to 7.2;
- and
- separating genistin malonate and daidzin malonate from the neutralized organic phase.
A method for inhibiting oxidation of a food comprising adding to a food an effective amount of at least one member selected from the group consisting of genistin malonate and daidzin malonate.
A method for inhibiting oxidation of a cosmetic comprising adding to a cosmetic an amount of at least one member selected from the group consisting of genistin malonate and daidzin malonate.
Dependencies are inferred from the claim text.