ENZYMATIC METHOD FOR IMPROVING THE INJECTABILITY OF POLYSACCHARIDES

ENZYMATIC ? IMPROVEMENT ? OF POLYSACCHARIDES 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 polysacchar...

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Hauptverfasser:	GRIFFITH, WILLIAM L, HOLLEMAN, JAMES W, COMPERE, ALICIA L
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF DYES ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MICROBIOLOGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MUTATION OR GENETIC ENGINEERING NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES POLYSACCHARIDES SPIRITS THEIR PREPARATION OR CHEMICAL WORKING-UP VINEGAR WINE
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Zusammenfassung:	ENZYMATIC ? IMPROVEMENT ? OF POLYSACCHARIDES 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 o 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 mover oil from oil-containing subterranean formations.