Process for producing and recovering erythritol from culture medium containing the same
AssigneeCerestar Holding B.V.
InventorsJean-Claude Marie-Pierre Ghislain de Troostembergh, Ignace André Debonne, Willy Richard Obyn
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Abstract
The present invention discloses a process for producing erythritol by fermentation using a polysaccharide negative erythritol producing strain and recovering erythritol crystals by direct crystallization from the unrefined micro-organism-free fermentation broth. Direct crystallization of erythritol is performed at dry substance higher than 80% w/w. Recovery of erythritol crystals is at least 85% and purity of erythritol crystals is at least 99% w/w.
Claims9
A process for producing erythritol by fermentation using micro-organisms and recovering erythritol crystals which comprises:
- a) selecting as, a microorganism, a polysaccharide negative erythritol producing strain which produces less than 1% polysacchrides based on erythritol content,
- b) preparing a fermentation culture medium,
- c) adding the microorganism to the fermentation culture medium,
- d) allowing the strained of microorganisms to grow until at least 50 g/L erythritol is obtained in the fermentation medium,
- e) removing the microorganism from the fermentation culture medium,
- f) concentrating the unrefined microogranism free fermentation culture medium to dry substance higher than 80% w/w,
- g) crystallizing erythritol, and
- h) collecting erythritol crystals.
Dependencies are inferred from the claim text.