Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
  • C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
  • C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
  • C08J3/095—Oxygen containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
  • C08K5/5205—Salts of P-acids with N-bases
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/02—Polyalkylene oxides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2300/00—Characterised by the use of unspecified polymers
  • C08J2300/14—Water soluble or water swellable polymers, e.g. aqueous gels

Definitions

• the present invention relates to stable non-aqueous slumes of water soluble polymers More specifically, the slumes are characte ⁇ zed by having as their medium low molecular weight polyethylene glycol, and as a stabilizer, an amine phosphate ester salt
• Hydrophilic polymers or gums are widely used in industry They are used to thicken, suspend or stabilize aqueous systems These gums can produce gels or act as emulsion stabilizers, fiocculants, binders, film formers, lub ⁇ ca ⁇ ts and f ⁇ ction reducers In each of these applications, the polymers are used to adjust and control the Theological properties of the aqueous system to which they are being added
• the polymers can be added to the aqueous systems as liquid slurries as liquid slurries.
• oil earners e g , mineral or diesel
• these slurries usually contain clay or clay like particulates which act to viscosify and stabilize the non-aqueous suspension
• the disadvantages of these earner systems is that attempts to eliminate the oil often an undesirable component result in the substitution of oil by toxic glycol ether
• the clay component itself is also often times an undesirable component This is particularly true in oil and gas field applications where incorporation of the clay into the slumes which is necessary to keep the polymer in solution, impairs the permeability of the oil or gas beanng strata This is the very problem caused by the formation of fisheyes that the oil slurry is supposed to eliminate
• U S Pat No 4,176,107 discloses liquid polymer compositions and to methods of prepa ⁇ ng these compositions which comp ⁇ se a high molecular weight water-soluble vinyl addition polymer, water, one or more surfactants, and a water-soluble polyalkylene glycol.
• U S Pat No 4,453 979 desc ⁇ bes the use of water with a high molecular weight blend of water and polyethylene glycol to disperse hydrophilic gums
• European Publication 58 017 desc ⁇ bes the use of a water and clay based d ⁇ lling fluid which contains high molecular weight PEG PEG ranging in molecular weight from 1000 to 10 000,000, which are solid at room temperature, are mentioned
• U S Pat No 4,799,962 discloses a particulate water- soluble polymer is dispersed in a liquid medium comp ⁇ sed of low molecular weight polyethylene glycol, water and high molecular weight polyethylene glycol in amounts sufficient to impart stability to the dispersion
• U S Pat No 5,362,312 discloses a earner for water-soluble polymers which includes polyethylene glycol, one or more viscosified polyo! fluid components, and one or more viscosifying polysaccha ⁇ des
• a novel non-aqueous slurry include one or more water- soluble polymers is provided.
• the slurry is environmentally friendly extremely stable over long penods of time and operative over a wide temperature range
• the invention comp ⁇ ses
• the water soluble polysaccha ⁇ de comp ⁇ ses guar gum, xanthan gum, and de ⁇ vatives thereof the polyalkylene glycol is polyethylene glycol having a molecular weight of less than about 1000 and the stabilizer is the reaction product of poly(oxy-1-2-ethaned ⁇ yl), ⁇ -9- octadecenyl- ⁇ -hydroxy-(2)-phosphate with 2-am ⁇ no-2-methyl-1-propanol
• the amount of polysacchande in the slurry typically ranges from about 0 1 to about 50 percent by weight of the slurry
• the above slurry can be used for the following applications environmental applications (e g , remediation projects), paper applications, ag ⁇ cultural applications, textile applications and oil field applications
• Still another embodiment of the present invention comprises a slurry stabilizing composition
• a slurry stabilizing composition comprising the reaction product of poly(oxy-1-2-ethaned ⁇ yl), ⁇ -9-octadecenyl- ⁇ -hydroxy-(Z)- phosphate with 2-am ⁇ no-2-methyl-1-propanol
• An object of the present invention is to provide a non-aqueous slurry which is environmentally friendly, extremely stable over long periods of time and operative over a wide temperature range
• Still another object of the present invention is to provide an environmental chemical, agricultural chemical, paper chemical, textile chemical or oil field chemical which includes the novel slurry
• a further object of the present invention is to provide a novel chemical which has utility as a slurry stabilizer
• the first element of the slurry is the water-soluble polymer
• the polymer is typically a polysaccha ⁇ de and comp ⁇ ses between about 0.1 and about 50.0 percent by weight of the slurry, more preferably between 30 and about 50 by weight of the slurry and most preferably between about 40 and about 50 by weight of the slurry.
• the polymer is a water dispersible or soluble hydrophilic polysaccha ⁇ de preferably selected from the group consisting of xanthan gum, gellan gum, algm, locust bean gum, de ⁇ vatized locust bean gum, carrageenan, guar gum, de ⁇ vatized guar gum, cellulosics such as carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and polyanionic cellulose, succinoglucans, polyacrylamides, starch and starch derivatives Mixtures of the above polymers are expressly contemplated as falling within the scope of the present invention
• Particularly preferred water-soluble polymers comprise xanthan gum, guar gum and guar gum derivatives
• De ⁇ vatized polymers include one or more non-ionic, anionic or cationic groups
• Examples of the types of functional groups involved in producing the derivatives include hydroxyalkyl groups, carboxyalkyl groups, quaternary ammonium groups, sulfonate groups, cyanoalkyi groups, phosphate groups, siloxane groups and the like having varying degrees of substitution and molecular substitution
• the resulting polygalactomanna ⁇ s may be multiple derivatives, such as double and t ⁇ ple denvatives having various degrees of substitution and molar substitution
• de ⁇ vatized polygalactomannans include hydroxypropyl guar gum, hydroxyethyl guar gum, 2-hydroxypropyl-t ⁇ methylammon ⁇ um halide guar gum (quaternary ammonium cationic guar), 2-hydroxypropyl-d ⁇ methylalkylammon ⁇ um halide guar gum (quaternary ammonium cationic guar, alkyl represents a long chain moiety having between 6 and 24 carbon atoms), 2-hydroxyethyl-d ⁇ methylalkylammon ⁇ um halide guar gum (quaternary ammonium cationic guar, alkyl represents a long chain moiety having between 6 and 24 carbon atoms); carboxyethyl guar gum, carboxymethyl guar gum, carboxymethylhydroxypropyl guar gum carboxymethylhydroxyethyl guar gum, and the like
• the second element in the slurry comprises polyalkylene glycol or thickened polyalkylene glycol
• the amount of this component in the slurry ranges from about 40 to about 98 8 percent by weight of the slurry
• Particularly preferred is the use of polyethylene glycol or polypropylene glycol
• Even more preferred is the use of low molecular weight glycols having a molecular weight of less than 1000, more preferably between about 100-600 and most preferably between about 200-500
• the use of polyethylene glycol having a molecular weight of about 200 can be used, for example
• thickened polyalkylene glycol refers to polyalkylene glycols preferably comprising between about 0 1-1 0% thickener selected from the group consisting of partially neutralized polyacrylic acid and hydroxypropyl cellulose, highly substituted hydroxypropyl guar, or their functional equivalents or mixtures thereof
• the third component of the slurry comprises an amine phosphate ester salt This material is present in the amount of 0 1 to about 10 0 by weight of the slurry, more preferably in the amount of 1 0 to about 6 0 by weight of the slurry and most preferably in the amount of 2 0 to about 5 0 by weight of the slurry
• This component is the reaction product of an amine with a phosphate ester which has one or more hydrophobic groups
• phosphate esters which may be selected as starting materials include phosphate esters of alkoxylated linear alcohols (ethoxylated and/or propoxylated) and phosphate esters of alkylphenols
• a particularly preferred commercially available phosphate ester comp ⁇ ses poly(oxy-1-2-ethaned ⁇ yl) ⁇ -9- ⁇ ctadecenyl- ⁇ -hydroxy-(Z)- phosphate
• the amine which may be used is any amine which is capable of reacting with the phosphate ester to yield an amine salt of the ester
• examples of such amines include 2-am ⁇ no-2-methyl-1- propanol, t ⁇ ethanol amine, diethanol amine and other mono, di and t ⁇ alkyl amines or amine alcohols with 2-am ⁇ no-2-methy 1-1 -propanol being particularly preferred
• Production of the amine phosphate ester salt is obtained by adding the phosphate ester to a vessel containing a solvent, preferably the polyalkylene glycol which is used to form the slurry of the present invention. Thereafter, the amine is added to the vessel, preferably at ambient temperatures, or at a temperature not greater than about 90°C and the contents are mixed under agitation until a uniform liquid mixture is obtained. The resulting mixture may be stored in a liquid form at ambient conditions.
• a solvent preferably the polyalkylene glycol which is used to form the slurry of the present invention.
• the slumes of the present invention may include the following optional additive mate ⁇ als: proppants, antifoaming agents, surfactants, corrosion inhibitors, bacte ⁇ cides and the like
• the stabilizing amine phosphate ester salt is first prepared, preferably in a polyalkylene glycol solvent If the amine phosphate ester salt is prepared in a solvent other than a polyalkylene glycol. it is isolated by means known in the art (e.g., filtration, crystallization, etc.) and thereafter mixed into the polyalkylene glycol
• the water-soluble polymer and optional additives are added to the polyalkylene glycol solvent containing amine phosphate ester salt stabilizer and the mixture is agitated for a time and agitation rate necessary to produce a uniform suspension
• Such conditions should be sufficient to create and maintain a vortex in the reaction vessel at temperatures less than 90°C, preferably at ambient temperatures (i.e., 20-40°C)
• the resulting suspension may be packaged and stored at ambient conditions.
• the slumes of the present invention are extremely stable, whereby they maintain their stability under ambient storage conditions without the formation of lumps from the water-soluble polymer for over three months, more preferably over six months and most preferably over twelve months
• the slurries may be used over a wide range of temperatures, with use ranges from about -20°C to about 50°C being considered as being within the scope of the present invention
• the slurries are considered environmentally friendly and are biodegradable
• the slumes of the present invention may be used in any number of commercial applications where dry water-soluble polymers have previously been used, as well as in applications where dry water-soluble polymers have not been well suited due to their slow dissolution rates
• the slumes are particularly useful for applications involving dispersing the water-soluble polymers in aqueous solutions Included amongst such applications are the following environmental applications (e g , remediation projects), paper applications, ag ⁇ cultural applications, textile applications and oil field applications
• the slur ⁇ es may be used as drainage and retention aids, in clarification of white water, as wet and dry strength resins, and as creeping aids
• the slurries may be used in carpet printing and dyeing, where it is imperative that the water-soluble polymer not contain lumps when coating onto the fabric as such lumps can reduce the value of the carpet from first quality to second
• the slumes may also be used as stabilizers for foamed backings for carpets
• the water-soluble polymers of this invention can be used to lower the pumping f ⁇ ction, to raise the low shear viscosity to control fluid loss to the surrounding strata, and to push the oil to the pumping well
• the polymers are also used in drilling muds, completion and work-over fluids, acidizing and fractu ⁇ ng fluids, in bar ⁇ er fluids to control the water-oil ratio and in polymer flooding operations
• the use of these polymers in flooding operations is becoming more important as the pnce of petroleum continues to increase and the availability continues to decrease
• the use of these polymers behind a micellar fluid allows the petroleum producer to obtain a third crop of oil from the fields
• polymers of this invention include those where the products are utilized as thickeners and suspending agents in aqueous emulsions, such as water-thinned paints Still other uses include hair sprays, gelatin substitutes for photographic applications, ceramics, cleaners, polishers, inks, fire-fighting chemicals, metal-working chemicals, components of adhesives and explosive formulations, binders for sand, ores, and coal.
• the reaction vessel is agitated at 650 rpm at a temperature of 25°C for 60 minutes until a uniform suspension is obtained
• the resulting mixture contains about 45 0 percent by weight of the suspension of xanthan gum
• the viscosity of the liquid is 8000 cps as measured by a Brookfield RVF Viscometer, Spindle #4, 20 rpm
• the slurry remains a stable liquid at storage temperatures as low as -20°C, and as high as 50°C and for storage periods exceeding one year
• This slurry may be used in the applications as previously discussed in this application, and more specifically, by dist ⁇ bution into an aqueous environment
• the xanthan gum will be distributed throughout the aqueous environment in a continuous form without the formation of lumps
• xanthan powder alone is added to an aqueous environment in solid form, many lumps will form and the resulting suspension will not be continuous
• the utilization of the inventive liquid non-aqueous slurry can be more beneficial for dist ⁇ bution of the xanthan into an aqueous environment as compared to a method which distributes the xanthan gum in solid, powder form

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
• Paper (AREA)
• Polysaccharides And Polysaccharide Derivatives (AREA)
• Polyethers (AREA)
• Cosmetics (AREA)

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Cited By (9)

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Citations (4)

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• 1997
  • 1997-06-02 WO PCT/IB1997/000629 patent/WO1997046606A1/en active Application Filing
  • 1997-06-02 GB GB9826778A patent/GB2331302B/en not_active Expired - Lifetime
  • 1997-06-02 AU AU27856/97A patent/AU2785697A/en not_active Abandoned
• 1998
  • 1998-12-04 NO NO19985690A patent/NO315749B1/no not_active IP Right Cessation

Patent Citations (4)

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