Patent ID: 7524526

Claim:
A process for producing a high purity isoflavone enriched fraction, the process comprising: crushing or grinding soybeans; removing oil from the crushed or ground soybeans, thus producing defatted soybean flakes; mixing the defatted soybean flakes with an alcohol, thus producing a liquor; separating a curd from whey of the liquor, thus producing soy solubles; subjecting the soy solubles to a chromatographic process consisting essentially of: placing the soy solubles in contact with an ionic resin, thus producing an isoflavone enriched fraction; eluting the isoflavone enriched fraction from the ionic resin; placing the isoflavone enriched fraction in contact with a non-ionic resin, thus producing the high purity isoflavone enriched fraction having a purity in a range of 70% to 100%; and eluting the high purity isoflavone enriched fraction from the non-ionic resin; wherein the isoflavones in the high purity isoflavone enriched fraction originate from the soybeans.