METHOD OF PROCESSING INULIN-CONTAINING RAW MATERIAL WITH OBTAINING FOOD INULIN POWDER AND METHOD OF OBTAINING ULTRA-PURE INULIN Russian patent published in 2017 - IPC C08B37/18 

FIELD: food industry.

SUBSTANCE: method comprises soaking and washing the raw material, cutting, drying, and grinding. The cut raw material is dried by blotting the surface moisture and subjected to infrared drying to the humidity of 10-12%, with the subsequent holding for 4-6 hours. The dried raw material is ground to the particle size of less than 100 mcm, and the resulting powder is re-dried to the humidity of 5-10%. Then it is divided into fractions according to the particle size: less than 15 microns - the first one, 15-25 microns - the second, and 25-100 microns - the third. The second fraction is dried to the humidity of 5-6% and subjected to re-grinding, followed by selecting the particles of less than 15 microns that are combined with the first fraction and used as food inulin. The residues of the second fraction are combined with the third fraction and used for producing ultra-pure inulin by preparing the aqueous suspension, holding it for at least 1 hour, and centrifuging. From inulin separated from membranes, suspension is prepared. The resulting suspension is cleaned from proteins with solutions of sodium chloride and sodium hydroxide, with the subsequent centrifugation, filtration and depigmentation of the obtained extract on anionite. Fructans are then concentrated and precipitated from the pre-heated concentrate with a solvent, preferably ethyl alcohol, taken in a volume equal to 1.5-2.5 of the concentrate volume, with the subsequent filtration, washing with ethanol and vacuum drying of the finished product.

EFFECT: invention allows to obtain inulin by the dry method and to improve the efficiency of complex processing of inulin-containing raw materials.

6 cl, 3 dwg