Process for preparing Xanthomonas heteropolysaccharides
AssigneeShell Oil Company
InventorJohn D. Downs
Life of this patent
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Abstract
Process for preparing Xanthomonas heteropolysaccharide from Xanthomonas campestris NCIB 11854 and use of the latter, e.g. as viscosity modifier in an aqueous solution, and in a drilling fluid and use in connection with well treatments, and enhanced oil recovery.
Claims6
A process for preparing Xanthomonas campestris heteropolysaccharide which comprises growing the organism Xanthomonas campestris NCIB 11854 in a chemically defined aqueous nutrient medium by aerobic fermentation of an assimilable carbohydrate and nitrogen source and recovering the heteropolysaccharide.
A heteropolysaccharide prepared by growing Xanthomonas campestris NCIB 11854 in a chemically defined aqueous nutrient medium by aerobic fermentation of an assimilable carbohydrate and nitrogen source and recovering the heteropolysaccharide.
The biologically pure culture of the Xanthomonas campestris NCIB 11854.
Dependencies are inferred from the claim text.