Enzymatic method for improving the injectability of polysaccharides

Griffith, William L; Compere, Alicia L; Holleman, James W

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Title: Enzymatic method for improving the injectability of polysaccharides

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Abstract

A method for enhancing the ability of polysaccharides in aqueous solution to flow through a porous medium comprises contacting the polysaccharides with an endoenzyme capable of hydrolyzing at least one of the linkages of the sugar units of the polysaccharides and maintaining the polysaccharides in contact with the enzyme under hydrolysis conditions for a time sufficient to decrease the tendency of the polysaccharides to plug the porous medium yet insufficient to decrease the viscosity of the aqueous polysaccharides by more than 25%. The partially hydrolyzed polysaccharides are useful as thickening agents for flooding water used to recover oil from oil-containing subterranean formations.

Inventors:

Griffith, William L ^[1]; Compere, Alicia L ^[2]; Holleman, James W ^[1]

Oak Ridge, TN
Knoxville, TN

Issue Date:: 1982-01-01

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 864183

Patent Number(s):: 4326037

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08B - POLYSACCHARIDES

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

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C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08B - POLYSACCHARIDES
C08B37/00 - Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
C09K8/035 - Organic additives
C09K8/905 - {Biopolymers}

C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {
C12P19/04 - Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
C12P19/06 - Xanthan, i.e. Xanthomonas-type heteropolysaccharides

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Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: enzymatic; method; improving; injectability; polysaccharides; enhancing; ability; aqueous; solution; flow; porous; medium; comprises; contacting; endoenzyme; capable; hydrolyzing; linkages; sugar; units; maintaining; contact; enzyme; hydrolysis; conditions; time; sufficient; decrease; tendency; plug; insufficient; viscosity; 25; partially; hydrolyzed; useful; thickening; agents; flooding; water; recover; oil; oil-containing; subterranean; formations; partially hydrolyzed; porous medium; subterranean formation; comprises contacting; time sufficient; aqueous solution; medium comprises; subterranean formations; recover oil; enzymatic method; /435/166/

Citation Formats


                    Griffith, William L, Compere, Alicia L, and Holleman, James W. Enzymatic method for improving the injectability of polysaccharides.  United States: N. p., 1982. 
        Web.

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                    Griffith, William L, Compere, Alicia L, & Holleman, James W. Enzymatic method for improving the injectability of polysaccharides.  United States.

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                    Griffith, William L, Compere, Alicia L, and Holleman, James W. Fri .  
        "Enzymatic method for improving the injectability of polysaccharides".  United States.  https://www.osti.gov/servlets/purl/864183.

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@article{osti_864183,

  title        = {Enzymatic method for improving the injectability of polysaccharides},

  author       = {Griffith, William L and Compere, Alicia L and Holleman, James W},

  abstractNote = {A method for enhancing the ability of polysaccharides in aqueous solution to flow through a porous medium comprises contacting the polysaccharides with an endoenzyme capable of hydrolyzing at least one of the linkages of the sugar units of the polysaccharides and maintaining the polysaccharides in contact with the enzyme under hydrolysis conditions for a time sufficient to decrease the tendency of the polysaccharides to plug the porous medium yet insufficient to decrease the viscosity of the aqueous polysaccharides by more than 25%. The partially hydrolyzed polysaccharides are useful as thickening agents for flooding water used to recover oil from oil-containing subterranean formations.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1982},

  month        = {1}

}

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