83 results about "Vinylphosphonic acid" patented technology

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.

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.

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.