Deborah Ann Hurst

US Patent:

7084263, Aug 1, 2006

Filed:

Mar 26, 2003

Appl. No.:

10/397692

Inventors:

Thomas A. Dobbins - Howard OH, US
Deborah C. Hurst - New Concord OH, US

Assignee:

Wiley Organics, Inc. - Coshocton OH

International Classification:

C07H 17/00
A23J 1/14

US Classification:

536 8, 536128, 424757, 514 2, 514456, 426634, 426 46, 530378, 435 681

Abstract:

A process for enriching the relative concentration of genistin from a mixture of isoflavones is described. In accordance with one aspect of the invention, the process comprises providing a material containing a mixture of isoflavones, extracting the material with an aqueous organic solvent solution, adding calcium oxide or calcium hydroxide to the extract to form calcium-isoflavone complexes and separating precipitated calcium-isoflavone complexes from the extract. The precipitated calcium-isoflavone complexes contain a higher concentration of genistin complexes than daidzin and glycitin complexes.