METHOD FOR PRODUCTION OF GLUCONO-DELTA-LACTONE FOOD ADDITIVE Russian patent published in 2014 - IPC A23L1/30 C07D309/30 

FIELD: food industry.

SUBSTANCE: method involves introduction of glucono-delta-lactone crystals into a solution of gluconic acid with weight fraction equal to 80-95% in an amount of 1-3% of the acid weight. Then one performs glucono-delta-lactone crystallisation from oversaturated gluconic acid solution while stirring with a stirrer with a rotation rate equal to 20-60 rpm. Then one performs staged cooling of the crystallising mass: from 70°C to 65°C at a rate of 0.5-0.6°C per hour, from 65°C to 55°C at a rate of 0.8-1.0°C per hour, from 55°C to 45°C at a rate of 0.4-0.5°C per hour and from 45°C to 40°C at a rate of 0.3°C per hour. Then the produced glucono-delta-lactone crystals are separated from the mother solution.

EFFECT: invention allows to produce a glucono-delta-lactone food additive with improved quality and high product yield.

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