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US 8,685,253 B2Granted
Processes for removing color during production of runway deicer
AssigneeBioamber S.A.S.
InventorOlan S. Fruchey
Life of this patent
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Abstract
A method of removing color bodies from a fermentation broth includes precipitating a color-forming impurity (color body) by adjusting the fermentation broth to a pH greater than about 13; filtering our precipitated color-forming impurities from the broth; and bleaching a second color impurity by treating the broth with an oxidizing agent.
Claims12
A method of removing color-forming impurities from an aqueous fermentation broth containing carboxylic acids and salts thereof comprising:
- (a) precipitating a first color-forming impurity by adjusting the aqueous fermentation broth containing carboxylic acids and salts thereof to a pH greater than about 13;
- (b) filtering out the precipitated first color-forming impurity from the broth;
- and
- (c) bleaching a second color impurity by treating the fermentation broth with an oxidizing agent to render a solution comprising carboxylic acids and salts thereof.
1 more element
A method of removing color-forming impurities from a fermentation broth containing diammonium succinate, monoammonium succinate or mixtures thereof comprising:
- (a) precipitating a first color-forming impurity by adjusting the fermentation broth to a pH greater than about 13;
- (b) filtering out the precipitated first color-forming impurity from the broth;
- and
- (c) bleaching a second color impurity by treating the broth with an oxidizing agent to render a solution comprising diammonium succinate monoammonium succinate or mixtures thereof.
1 more element
Dependencies are inferred from the claim text.