LACTULOSE CONCENTRATE PRODUCTION METHOD Russian patent published in 2014 - IPC C13K5/00 A23C21/00 

FIELD: food industry.

SUBSTANCE: one performs milk whey acceptance, separation, pasteurisation, cooling, ultrafiltration, the ultrafiltrate (permeate) condensation till dry substances content is equal to 20%. One performs the whey heating up to 75.5±2.5°C, alkali introducing, thermostating at a temperature of 40±2 minutes and acidifying with citric acid till pH is equal to 7.5-8.0. The produced solution is demineralised and cooled to 50-60°C. One performs lactose hydrolysis with β- galactosidase during 30-120 minutes with subsequent condensation of the concentrate till dry substances content is equal to 60%.

EFFECT: high lactulose content, additional enrichment of the concentrate with prebiotic substances and the method simplification and acceleration.

2 tbl, 2 ex