US 5,846,590 AGranted

Method for enriching soluble dietary fibre

AssigneeExavena OY

InventorsYrjo Malkki, Olavi Myllymaki

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Abstract

The subject of this invention is a method for producing a product with an enriched content of soluble dietary fiber, such as .beta.-glucan and/or pentosans from a raw material deriving from cereal grains, by using thermal, enzymatic or osmotic treatments or combinations of these. As a first step, suspending of milled cereal or a fraction of cereal in water and when needed, a limited proteolysis is performed in order to improve the solubility of the fiber. Temperature of the mixture is elevated, and the soluble fiber is precipitated with a polar organic solvent on solid carrier particles, which can derive from the raw material or are added in the suspension. A fine fraction, consisting primarily of starch, is separated from the more coarse fraction containing the precipitated fiber, by using methods based on the particle size or density. When processing materials rich in fat, the soluble fiber fraction is extracted with a concentrated polar organic solvent for removing the residual lipids, and the particles obtained are finally dried.

Claims19

Dependent claims

A method for preparing a concentrate of soluble dietary fibre selected from the group consisting of .beta.-glucan and pentosans, from a milled raw material derived from cereal grains, comprising the steps of:

inactivating said raw material in respect of .beta.-glucanase and pentosanase enzymes;
adding water to said inactivated raw material to form a suspension;
heating said suspension to a temperature of 60-85 degrees celsius to extract soluble fibre from other cell wall components of said inactivated raw material so that a suspension of solid particles and soluble dietary fibre is obtained;
adding a polar organic solvent to said suspension so as to precipitate the extracted soluble dietary fibre onto said solid particles;
homogenizing said suspension to detach fine-granuled solids, from said particles containing said precipitated dietary fibre;
separating said fine-granuled solids on the basis of particle size and/or density from coarse particles containing said precipitated dietary fibres;
separating said coarse particles containing said precipitated dietary fibre from any liquid remaining from the suspension and drying said coarse particles containing said precipitated dietary fibre to form a final product.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/564,336Filed 4 Dec 1995
Priority: FI 9325584 Jun 1993
Granted: 8 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A23L 33/24
Addition of substantially indigestible substances, e.g. dietary fibres: cellulose or derivatives thereof
A23L 7/107
Fermentation of farinaceous cereal or cereal material; Addition of enzymes or microorganisms: addition or treatment with enzymes not combined with…
A23L 7/115
Cereal-derived products: cereal fibre products, e.g. bran, husk
A23L 33/21
Reducing nutritive value; Dietetic products with reduced nutritive value: addition of substantially indigestible substances, e.g. dietary fibres