METHOD FOR PRODUCING FRUCTOSE-GLUCOSE SYRUP Russian patent published in 2004 - IPC

FIELD: food industry. SUBSTANCE: invention relates to method for processing Jerusalem artichoke tubers to prepared fructose-glucose syrup. Method involves preparing root crops for processing followed by their blanching, milling to pulp and pressing. Acid hydrolysis of inulin is carried out with ortho-phosphoric acid at pH of solution 0.5-5.0 and temperature 35-100 C for 30-120 min. Then hydrolyzate is neutralized with lime of milk taken in the amount 3-14 g/l followed by removing insoluble calcium phosphate precipitate from hydrolyzate by centrifugation. Neutralized hydrolyzate is purified by ultrafiltration on membranes with pores size 10-500 , under pressure 0.1-1.6 MPa, at temperature 20-100 C and rate of solution flow 10 m/s, not above. Prepared filtrate is subjected for ion-exchange purification on cation-exchange and anion-exchange resins up to content of reducing substances 80%, not less, of dry matters content in solution. Purified fructose-glucose solution is evaporated to obtain syrup at temperature 80 C, not above, up to content of reducing agents 80%, not less, of fry matters content in solution. Invention provides intensification of hydrolysis process and purification of fructose-glucose solution and reducing loss of carbohydrates during the process. Prepared syrup can be used as a supplement in confectionary, baking and canning industry, in producing beverages and as self-contained nutrition product. EFFECT: improved producing method, valuable properties of product. 3 cl, 1 ex