Modified heteropolysaccharides and their preparation

Details Modified heteropolysaccharides and their preparation Modified heteropolysaccharides and their preparation

1979-04-11

1981-03-17

Guynn, Herbert B.

Compositions

Leather or fur treating

166246, E21B 4322, C12P 1906

Patent

active

042565901

ABSTRACT:
A composition containing a heteropolysaccharide produced by the action of bacteria of the genus Xanthomonas, wherein the heteropolysaccharide has been modified by heating, at a temperature of at least 100.degree. C. for 1 to about 300 minutes, an aqueous solution containing native, untreated heteropolysaccharide produced by the action of bacteria of the genus Xanthomonas, and at least about 0.5 weight percent salt. The solution is preferably filtered or otherwise treated to separate the modified heteropolysaccharide from bacterial cells, cellular debris and other materials, prior to being put to use in, e.g., oil recovery processes, additive for foodstuffs, pharmaceutical preparations, etc.

REFERENCES:
patent: 2773752 (1973-11-01), Buchanan et al.
patent: 3801502 (1974-04-01), Hitzman
patent: 4135979 (1979-01-01), Corley et al.
Patton, SPE Paper 4670, Delivered at 48th Annual Fall Meeting of Society of Petroleum Engineers of AIME, Las Vegas, Nevada, Sep. 30-Oct. 3, 1973.
Lipton, SPE paper 5099, Delivered at 49th Annual Fall Meeting of Society of Petroleum Engineers of AIME, Houston, Texas, Oct. 6-9, 1974.
Jeanes et al., J. Applied Polymer Science, vol. V, No. 17, 1961, pp. 519-526.
Jeanes et al., J Applied Polymer Science, vol. 8, 1964, pp. 2775-2787.

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