Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]

Title: Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]

Full Record
Other Related Research

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, W.L.; Compere, A.L.; Holleman, J.W.

OSTI Identifier:: 5118416

Assignee:: Dept. of Energy TIC; ERA-05-037597; EDB-80-115598

DOE Contract Number:: W-7405-ENG-26

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; 59 BASIC BIOLOGICAL SCIENCES; OIL WELLS; ENHANCED RECOVERY; POLYSACCHARIDES; ENZYMATIC HYDROLYSIS; FLUID FLOW; HYDROLASES; OPTIMIZATION; POROUS MATERIALS; VISCOSITY; WATERFLOODING; CARBOHYDRATES; CHEMICAL REACTIONS; DECOMPOSITION; ENZYMES; FLUID INJECTION; HYDROLYSIS; LYSIS; MATERIALS; ORGANIC COMPOUNDS; RECOVERY; SACCHARIDES; SOLVOLYSIS; WELLS; 020300* - Petroleum- Drilling & Production; 550200 - Biochemistry

Citation Formats


                    Griffith, W.L., Compere, A.L., and Holleman, J.W. Enzymatic method for improving the injectability of polysaccharides. [US Patent Application].  United States: N. p.,  
        Web.

Copy to clipboard


                    Griffith, W.L., Compere, A.L., & Holleman, J.W. Enzymatic method for improving the injectability of polysaccharides. [US Patent Application].  United States.

Copy to clipboard


                    Griffith, W.L., Compere, A.L., and Holleman, J.W. .  
        "Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]".  United States.

Copy to clipboard


                    
@article{osti_5118416,

  title        = {Enzymatic method for improving the injectability of polysaccharides. [US Patent Application]},

  author       = {Griffith, W.L. and Compere, A.L. and Holleman, J.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         = {},

  month        = {}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Patents and OSTI.GOV collections:

Enzymatic method for improving the injectability of polysaccharides

Patent Compere, A.L.; Griffith, W.L.; Holleman, J.W.

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-containingmore » subterranean formations.« less
Enzymatic method for improving the injectability of polysaccharides

Patent Griffith, William L. (Oak Ridge, TN); Compere, Alicia L. (Knoxville, TN); Holleman, James W. (Oak Ridge, TN)

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-containingmore » subterranean formations.« less
Full Text Available
Method for improving dissolution efficiency in gas-absorption and liquid extraction processes. [Patent application]

Patent Kanak, B.E.; Stephenson, M.J.

A method is described for improving dissolution efficiency in processes in which a feed fluid is introduced to a zone where it is contacted with a liquid solvent for preferentially removing a component of the feed and where part of the solvent so contacted undergoes transfer into the feed fluid to saturate the same. It has been found that such transfer significantly impairs dissolution efficiency. In accordance with the invention, an amount of the above-mentioned solvent is added to the feed fluid being introduced to the contact zone, the solvent being added in an amount sufficient to effect reduction ormore »« less
Method of uranium reclamation from aqueous systems by reactive ion exchange. [US DOE patent application; anion exchange resin of copolymerized divinyl-benzene and styrene having quarternary ammonium groups and bicarbonate ligands]

Patent Maya, L.

A reactive ion exchange method for separation and recovery of values of uranium, neptunium, plutonium, or americium from substantially neutral aqueous systems of said metals comprises contacting said system with an effective amount of a basic anion exchange resin of copolymerized divinyl-benzene and styrene having quarternary ammonium groups and bicarbonate ligands to achieve nearly 100% sorption of said actinyl ion onto said resin and an aqueous system practically free of said actinyl ions. The method is operational over an extensive range of concentrations from about 10/sup -6/ M to 1.0 M actinyl ion and a pH range of about 4more »« less
Method for oxygen reduction in a uranium-recovery process. [US DOE patent application]

Patent Hurst, F.J.; Brown, G.M.; Posey, F.A.

An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solutions and solvents used in a reductive stripping stage with an effective volume of a nonoxidizing gas before the introduction of the solutions and solvents into the stage. Effective volumes of nonoxidizing gases, selected from the group consisting of argon, carbon dioxide, carbon monoxide, helium, hydrogen, nitrogen, sulfur dioxide, and mixtures thereof, displace oxygen from the solutions and solvents thereby reduce deleterious effects of oxygen such as excessive consumption of elemental or ferrous iron and accumulation of complex iron phosphates or cruds.

Similar Records