83 results about "Vinylphosphonic acid" patented technology

A method is provided for treating a zone of a subterranean formation penetrated by a wellbore. The method includes a step of introducing a treatment fluid into a zone of a subterranean formation through the wellbore, wherein the treatment fluid comprises: (i) water; (ii) a gelling agent comprising a polymer grafted with a vinyl phosphonic acid or derivative thereof; and (iii) a crosslinking agent, and the step of subsequently introducing an oxidizer into a zone of a subterranean formation through the wellbore. According to another aspect the method includes a step of introducing a treatment fluid into a zone of a subterranean formation through the wellbore, wherein the treatment fluid comprises: (i) water; (ii) a gelling agent comprising a polymer grafted with a vinyl phosphonic acid or derivative thereof; and (iii) a magnesium oxide; and the step of: introducing an acid into the zone through the wellbore.

Compositions and methods of treating high temperature subterranean formations of up to about 500° F. (260° C.) are provided. The compositions and methods utilize a high molecular weight synthetic copolymer and a pH buffer than maintains a pH in a range of about 4.5 to about 5.25 for the compositions. The high molecular weight synthetic copolymer is derived from acrylamide, acrylamidomethylpropanesulfonic acid, and vinyl phosphonate.

The invention discloses an inverse-phase micro-emulsion polymer fracturing fluid system with an online construction function. The inverse-phase micro-emulsion polymer fracturing fluid system comprisesinstant dissolving emulsion thickening agents, functional auxiliaries, a clay stabilizer and fluid preparation water. The instant dissolving emulsion thickening agents are inverse-phase micro-emulsion polymers, and inverse-phase micro-emulsion polymerization is carried out on raw materials including acrylamide, acrylic acid, strong-hydrophilicity monomers, a functional monomer A, a functional monomer B, pH (potential of hydrogen) regulators, solubilizers, composite emulsifiers, oil solvents, initiators and deionized water to obtain the instant dissolving emulsion thickening agents; the functional monomer A is methyl methacrylate or ethyl methacrylate or a mixture of the methyl methacrylate and the ethyl methacrylate; the functional monomer B is vinylphosphonic acid or vinyl sulfonic acid;the functional auxiliaries are non-ionic surfactants; the clay stabilizer is potassium chloride, and the fluid preparation water is clear water or high-mineralization water or treated stratum flow-back fluid. The inverse-phase micro-emulsion polymer fracturing fluid system has the advantages that the inverse-phase micro-emulsion polymer fracturing fluid system is high in dispersing and swelling speed and can be prepared in a batch manner or can be continuously mixed, 'online construction' requirements even can be completely met by the inverse-phase micro-emulsion polymer fracturing fluid system, processes for constructing the inverse-phase micro-emulsion polymer fracturing fluid system are simple, and the fracturing cost can be reduced.

The invention discloses a high-oxidization-resistance and high-conductivity crosslinked type polybenzimidazole high-temperature proton exchange membrane and a preparation method therefor. The crosslinked membrane takes polybenzimidazole as a polymer framework; through polymerization, a crosslinked net-shaped structure is formed in the membrane by taking vinyl phosphonic acid and vinyl triazole as a crosslinking agent; and a free radical quenching agent which can improve the oxidization resistance of the membrane is doped in the membrane to prepare the high-oxidization-resistance and high-conductivity high-temperature proton exchange membrane. The crosslinked high-temperature proton exchange membrane disclosed by the invention has relatively high proton conductivity and excellent dimensional stability in a non-humidifying condition, and has high oxidization resistance, so that the problem of phosphoric acid loss of a polybenzimidazole / phosphoric acid membrane is completely solved, and the bottleneck that the polymer membrane is degraded under attack of free radicals is overcome; and therefore, the proton exchange membrane can be applied to a high-temperature proton exchange membrane fuel cell, a direct alcohol type fuel cell, an electrochemical sensor or other electrochemical apparatuses as the proton exchange membrane.

The invention discloses a high-strength mineralized hydrogel and applications of the high-strength mineralized hydrogel in bone repair. According to the present invention, N-acryloyl glycinamide and vinylphosphonic acid are used as raw materials and are co-polymerized in the presence of an initiator to prepare a hydrogel, calcium ions and phosphorus ions are deposited in situ in the gel to form hydroxyapatite, the mineralized hydrogel pipe has good tensile performance and good compressive performance due to the physical cross-linking effect of the hydrogen bond and the ion cross-linking effectof the hydroxyapatite and the gel matrix in the gel structure, and due to the presence of hydroxyapatite, the osseointegration and bone repair ability of the gel pipe is improved.

The invention discloses polyphosphonic acid type water reducing agents. The polyphosphonic acid type water reducing agents are prepared from raw materials as follows: a, methyl allyl polyethenoxy ether; b, acrylic acid or methylacrylic acid; c, vinylphosphonic acid; d, ammonium persulfate; e, mercaptoacetic acid or mercaptopropionic acid; f, trisodium phosphate. The mole ratio of a to b to c to f is 1:(3-4):(0.2-1):(2-3); the material d accounts for 0.2%-0.5% of the total weight of all the materials; the material e accounts for 0.1%-0.3% of the total weight of all the materials. Besides, the invention further discloses a synthesis method of the polyphosphonic acid type water reducing agents. Compared with common polycarboxylate superplasticizers, the phosphonic acid and carboxylic acid copolymerized water reducing agent has a better water reducing effect and a slump keeping effect and has a certain delayed coagulation function on concrete.

Well treatment fluids and methods of treating high temperature subterranean formations of up to about 500° F. (260° C.) are provided. The well treatment fluids and methods utilize a high molecular weight synthetic copolymer and a pH buffer than maintains a pH in a range of about 4.5 to about 5.25 for the fluids. The high molecular weight synthetic copolymer is derived from acrylamide, acrylamidomethylpropanesulfonic acid, and vinyl phosphonates. The well treatment fluids may be energized or foamed.

The invention discloses a method for metal surface passivation, and the method comprises the following steps: 1) mixing, by mass, 1-2 parts of quaternized polyethylenimine, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of polyethyleneimine, 1-2 parts of quaternized polyvinylamine, 1-2 parts of alkoxylated polyethyleneimine, 1-2 parts of polyvinyl imidazole, 80 parts of water, 1-2 parts of fatty alcohol-polyoxyethylene ether and 2-3 parts of polyglycerol monostearate, then adding 20-60 parts of a copolymer synthesized by acrylic acid, vinyl phosphonic acid and hydroxyethyl acrylate to produce a conditioning fluid with the pH value of 2.3 - 2.5; and 2) applying a metal surface with the conditioning fluid in a manner of a wet film. By the method for the metal surface passivation, a fully crosslinkedstable passivation film coating layer is formed on the metal surface.

The invention discloses phosphonic acid-functionalized polymer / graphene nanobelt composite aerogel and a preparation method and application thereof, belonging to the field of preparation methods and application of graphene nanobelt composite aerogel. The invention aims to solve the technical problem of low adsorption capacity of an existing graphene aerogel adsorption material. The phosphonic acid-functionalized polymer / graphene nanobelt composite aerogel is aerogel which takes a graphene oxide nanobelt as a matrix that is grafted with a polymer using phosphonic acid as a functional group. Thepreparation method comprises the following steps: 1, preparing a graphene oxide nanobelt; 2, adding trimethylolpropane trimethacrylate, vinylphosphonic acid, azodiisobutyronitrile and the graphene oxide nanobelt into an organic solvent, and carrying out a solvothermal reaction to obtain a solid; and 3, successively carrying out washing, freezing and drying to obtain the composite aerogel, whereinthe grafting rate of phosphorus in the aerogel is 15-25%. The aerogel can be used as an adsorbent for treating thorium-containing wastewater, the adsorption capacity of the aerogel is 300-380 mg / g, and the aerogel can be used in the field of nuclear wastewater treatment.

A compound having the formula below. X is hydroxyl, a sulfonic ester or salt thereof, a phosphonate or salt thereof, a carboxylate or salt thereof, or a boronic ester or salt thereof. The value n is an integer greater than or equal to 2. A polymer made by polymerizing the compound. A method of: reacting NH2—(CH2—CH2—O)n—CH2—CH2—OH with thiophene acid chloride to form a (SC4H3)—CO—NH—(CH2—CH2—O)n—CH2—CH2—OH amide; reacting the amide with a vinyl sulfonic ester, a vinyl phosphonate, a vinyl carboxylate, or a vinyl boronic ester to form an intermediate; and converting the intermediate to a salt form.

The invention discloses a water electrolysis hydrogen production proton exchange membrane and a preparation method thereof.The preparation method of the water electrolysis hydrogen production proton exchange membrane comprises the steps that a vinyl alkaline substance, vinyl phosphoric acid and an initiator are added into a solvent, the temperature condition is 65-85 DEG C, a copolymerization reaction is carried out under the anaerobic condition, and the water electrolysis hydrogen production proton exchange membrane is obtained; the vinyl phosphonic acid and vinyl imidazole copolymer is obtained; carrying out purification treatment on the vinyl phosphonic acid-vinyl imidazole copolymer; the vinylphosphonic acid-vinyl imidazole copolymer, perfluorinated sulfonic acid resin and a dimethylformamide solution which are subjected to purification treatment are prepared into polymer slurry; and coating a microporous reinforced membrane with the polymer slurry, and carrying out drying treatment and heat treatment on the polymer slurry to obtain the proton exchange membrane with the interpenetrating network structure for hydrogen production by electrolysis of water. According to the method, the proton conduction capability of the water electrolysis hydrogen production proton exchange membrane is enhanced, and the performance of the water electrolysis hydrogen production proton exchange membrane on the water electrolysis membrane electrode is improved.