Method of purifying ferment-produced riboflavin
AssigneeBASF SE
InventorsJohannes Grimmer, Hans Kiefer, Christoph Martin
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Abstract
A method of purifying ferment-produced riboflavin, wherein the impure riboflavin is suspended in water or dilute aqueous acid, and the suspension is heated at a temperature of from 75.degree. to 130.degree. C. for from 0.3 to 3 hours with stirring, during which time crystal transformation takes place, after which the mixture is cooled and the purified product is isolated in known manner.
Claims6
A method of purifying ferment-produced riboflavin, wherein the impure riboflavin obtained after fermentation is suspended in water or dilute aqueous acid in an amount of 10 to 30 times the weight of the riboflavin without dissolving the riboflavin, and the resulting suspension is heated at a temperature of from 75.degree. to 130.degree. C. for from 0.3 to 3 hours with stirring while maintaining the suspension, and the crystals formed on cooling are isolated.
Dependencies are inferred from the claim text.