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US 2011/0089364 A1Published application
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.
Claims11
A method of removing color bodies from a fermentation broth comprising:
- (a) precipitating a color-forming impurity (color body) by adjusting the fermentation broth to a pH greater than about 13;
- (b) filtering out precipitated color-forming impurities from the broth;
- and
- (c) bleaching a second color impurity by treating the broth with an oxidizing agent.
1 more element
A method of removing color bodies from a fermentation broth containing diammonium succinate, monoammonium succinate or mixtures thereof comprising:
- (a) precipitating a color body by adjusting the fermentation broth to a pH greater than about 13;
- (b) filtering out the precipitated color body from the broth;
- and
- (c) bleaching a second color body by treating the broth with an oxidizing agent.
1 more element
A process for producing a runway deicer comprising:
- (a) clarifying an ammonium succinate fermentation broth by ultrafiltration;
- (b) concentrating the broth by reverse osmosis;
- (c) precipitating out a color body by adjusting pH of the broth to greater than about 13 with potassium hydroxide;
- (d) filtering out the precipitated color body from the broth;
- (e) concentrating the resulting potassium succinate solution by evaporating a portion of water and most ammonia in the solution;
- (f) adding hydrogen peroxide to the solution to further lighten the residue;
- and
- (g) adjusting the pH to about 10.5 by adding an acid.
5 more elements
Dependencies are inferred from the claim text.