Method for producing a low viscosity xanthan gum
AssigneeStandard Oil Company (Indiana)
InventorWilliam P. Weisrock
Life of this patent
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Abstract
In the production of xanthan gum by action of the Xanthomonas bacteria on a nutrient medium, a low viscosity xanthan gum is produced by adding sulfate anions in a concentration ranging from about 0.2 to about 0.5 wt % of the nutrient medium during the culture of the Xanthomonas bacteria in the nutrient medium. A reduced viscosity xanthan gum is produced which can be converted to the normal viscosity xanthan gum.
Claims12
A process for the production of a heteropolysaccharide comprising culturing a microorganism of the genus Xanthomonas in a nutrient medium containing sulfate anion in a concentration effective to produce reduced viscosity heteropolysaccharide, said concentration being above about 0.2 wt %.
A process for production of a heteropolysaccharide comprising culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion in a concentration effective to produce reduced viscosity xanthan, said concentration being above about 0.2 wt %;
- withdrawing a heteropolysaccharide containing effluent from said zone;
- and heating said heteropolysaccharide containing effluent.
A process for production of heteropolysaccharide comprising continuously culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion in a concentration effective to produce reduced viscosity xanthan, said concentration being above about 0.2 wt %;
- and withdrawing a heteropolysaccharide containing effluent from said zone while continuing said culturing in said zone at a rate such that an essentially steady-state condition is maintained.
A process for production of heteropolysaccharide comprising continuously culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion in a concentration effective to produce reduced viscosity xanthan, said concentration being above about 0.2 wt %;
- withdrawing a heteropolysaccharide containing effluent from said zone while continuing said culturing in said zone at a rate such that an essentially steady-state condition is maintained;
- and heating said withdrawn heteropolysaccharide containing effluent.
A process for the production of heteropolysaccharide comprising culturing a microorganism of the genus Xanthomonas in a nutrient medium, containing sulfate anion having a concentration ranging from about 0.2 to about 0.5 wt %.
A process for production of a heteropolysaccharide comprising culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion having a concentration ranging from about 0.2 to about 0.5 wt %;
- withdrawing a heteropolysaccharide containing effluent from said zone;
- and heating said heteropolysaccharide containing effluent.
A process for production of heteropolysaccharide comprising continuously culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion having a concentration ranging from about 0.2 to about 0.5 wt %;
- and withdrawing a heteropolysaccharide containing effluent from said zone while continuing said culturing in said zone at a rate such that an essentially steady-state condition is maintained.
A continuous process for production of a heteropolysaccharide comprising continuously culturing a microorganism of the genus Xanthomonas in a nutrient medium contained in a fermentation zone, said nutrient medium containing sulfate anion having a concentration ranging from about 0.2 to about 0.5 wt %;
- withdrawing a heteropolysaccharide containing effluent from said zone while continuing said process in said zone at a rate such that an essentially steady-state condition is maintained;
- and heating said withdrawn heteropolysaccharide containing effluent.
Dependencies are inferred from the claim text.