Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1977-05-09
1980-01-08
Guynn, Herbert B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
435104, 435281, 252 855D, C12D 1304, C08B 3700, E21B 4322
Patent
active
041828607
ABSTRACT:
A process for producing modified heteropolysaccharides derived from a bacteria of the genus Xanthomonas, comprising the steps: (a) preparing an aqueous solution which contains (i) from about 200 to about 30,000 parts per million, by weight of an impure and unmodified heteropolysaccharide product and (ii) at least about 0.5 weight percent of at least one salt to obtain a saline heteropolysaccharide solution; (b) heating said saline heteropolysaccharide solution to a temperature of at least about 100.degree. C.; (c) maintaining said saline heteropolysaccharide solution at a temperature of at least about 100.degree. C. for a period of time sufficient to increase the injectivity and filterability characteristics of the heteropolysaccharide but for an insufficient time to impair the viscosity imparting properties of the heteropolysaccharide; and (d) removing or separating the proteinaceous materials and/or residual whole bacterial cells or other cell debris from the saline and heat-treated heteropolysaccharide product. 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: 3305016 (1967-02-01), Lindblom et al.
patent: 3355447 (1967-11-01), O'Connell
patent: 3591578 (1971-07-01), Colin et al.
patent: 3711462 (1973-01-01), Abdo
patent: 3729460 (1973-04-01), Patton
patent: 3773752 (1973-11-01), Buchanan et al.
patent: 3801502 (1974-04-01), Hitzman
patent: 4135979 (1979-01-01), Corley et al.
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.
Lipton, SPE Paper 5099, Delivered at 49th Annual Fall Meeting of Society of Petroleum Engineers of AIME, Houston, Texas, Oct. 6-9, 1974.
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.
Laskin Allen I.
Naslund Lars A.
Guynn Herbert B.
Halluin Albert P.
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