The US Patent office issued, 9th Jan 01, Patent # 6171638 to Archer Daniels Midland Company of Decataur, IL, for their improved process for producing isoflavine enriched fractions from soy protein extracts. This is an improvement over the same company’s, same inventors’ earlier inventions covered by US Patents 5702752, 5792503, and 6033714.
Besides Archer Daniels and its inventors Eric Gugger and Richard Grabiel, there seems to be no other company/ inventor active in this specific field.
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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.
Main (of 62) Claim.
The claimed invention is:
- A process for separating a plurality of forms of isoflavone fractions consisting of one or more forms of isoflavones in an aqueous plant starting material, said process comprising the steps of:
(a) heating an aqueous plant starting material to a constant temperature selected on a basis of an aqueous solubility for a desired isoflavone fraction containing at least one isoflavone that is to be recovered;
(b) passing the heated starting material of step (a) through an ultrafiltration membrane to obtain a permeate, the membrane having a cut-off which passes said at least one isoflavone fraction;
(c) treating the permeate with an adsorptive material;
(d) washing the material of step (c) in water;
(e) eluting said at least one isoflavone fraction from the water-washed adsorptive material of step (d) with an aqueous alcohol solvent to form a stream;
(f) removing the aqueous alcohol from the stream formed during the elution of step (e) so as to promote crystallization of said at least one isoflavone fraction;
(g) drying the product of step (f) to form dry particles;
(h) adding a solvent to the dried product of step (g) to form a mixture; and (i) separating the crystallized isoflavone fraction containing said at least one isoflavone from the mixture of step (h) to provide a product in a dry or liquid form.How well do you really know your competitors?
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By GlobalData
By Navroz Havewala, just-food.com correspondent
