Production of isoflavone enriched fractions from soy protein extracts
US6171638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2000 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The temperature sensitive differential of the solubilities of various isoflavone fractions is used to initially separate the fractions by heating an aqueous soy molasses or soy whey feed stream. The temperature of the feed stream is selected according to the temperature at which a desired isoflavone fraction or fractions become soluble. Then, the heated feed stream is passed through an ultrafiltration membrane or reverse osmosis in order to concentrate the solids. The resulting permeate is put through a resin adsorption process carried out in at least one liquid chromatography column to further separate the desired isoflavone fractions. Various processes are described for drying and crystallizing the isoflavone fractions to a powder. A solvent is then added to the isoflavone fraction to dissolve impurities and rehydrate the dry powder. Usually, the rehydrated isoflavone is used as an ingredient in a food ingredient or food product. At various points in the process a selected amount of isoflavones may or may not be blended with the powder in order to bring the isoflavone to a desired characteristic specification or to produce a food ingredient or food product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.