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934 results about "Salt resistance" patented technology

Salt sensitivity is a measure of how your blood pressure responds to salt intake. People are either salt-sensitive or salt-resistant. Those who are sensitive to salt are more likely to have high blood pressure than those who are resistant to salt.

Acrylic amide modified graft copolymer, preparation method and application thereof

The invention discloses an acrylamide modified graft copolymer and a preparation method and usage thereof. The invention is characterized in that 20 parts of acrylamide, 1-20 anionic monomer and/or cationic monomer, 0.1-15 macromonomer, 0.05-10 ionic lyophobic monomer and 50-1000 deionized water are added into a three-necked reaction bottle, the pH value is adjusted to be 3-9, N2 is introduced for 30min, then 0.002-0.5 part of initiator persulfate is added at 30-75 DEG C, the reaction lasts 8-36h, then copolymer PAB is obtained, and finally water is used for dilution to obtain strong PAB solution. During polymerization, no surfactant is used, and the macromonomer with a long chain and the ionic lyophobic monomer with intermolecular association function are introduced into the copolymer PAB, so the capabilities of cooperative tackification and salt-resistance between the rigid conformation of a molecular chain and the intermolecular association can be played optimally, the PAB exhibits unique solution property and has higher colloidal viscosity in high saline solution than in fresh water, and the PAB obtains the capabilities of tackification, salt resistance, low surface tension and strong molecular association and can be used for the oil-displacing acrylamide modified graft copolymer. The copolymer is prepared into water solution with mass concentration of 0.2-3.0g/L and surfactant concentration of 0.01-2 mmol/L, then the water solution is added into a mixing vessel by a stirring device, and then a polymer oil-displacing agent with tackification, salt resistance and cutting resistance is obtained. The PAB has the functions of both a tackifier and a macromolecule surfactant. The copolymer PAB is prepared into water solution which has mass concentration of 0.05-7%, so the macromolecule surfactant with excellent surface activeness can be obtained and then applicable to an emulsifier, an emulsion splitter, a solubilizer and a wetting agent.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Association-type non-crosslinking fracturing fluid and preparation method thereof

The invention provides association-type non-crosslinking fracturing fluid and a preparation method thereof. The association-type non-crosslinking fracturing fluid is prepared from hydrophobic modified partial hydrolytic polyacrylamide and derivatives of the hydrophobic modified partial hydrolytic polyacrylamide serving as active ingredients, a gel breaker, potassium chloride, an optional surface active agent and water, wherein each of the molecular structures of the hydrophobic modified partial hydrolytic polyacrylamide and the derivatives of the hydrophobic modified partial hydrolytic polyacrylamide contains acrylamide monomer unit, at least one biparental unsaturated monomer unit and at least one an anion alkene unsaturated monomer unit. As the molecular structure of a thickening agent contains a biparental monomer unit, a reversible super-molecule network can be formed in an aqueous solution through intermolecular hydrophobic association, and the high viscosity and the suspending power required by the fracturing fluid can be obtained without needing chemical crosslinking. The association-type non-crosslinking fracturing fluid based on the thickening agent has the characteristics of simple composition, low residue content, low damage, low friction, shear resistance, temperature resistance and salt resistance and can turn into a new generation of fracturing fluid system for replacing guanidine gum and fracturing fluid thereof.
Owner:SOUTHWEST PETROLEUM UNIV

Non-linear associating water-soluble quadripolymer, and preparation and use thereof

The invention discloses a non-linear associated water soluble quadripolymer as well as a preparation method and use thereof, comprising: adding 20 parts of acrylamide, 1-20 parts of nionic monomer or/and cationic monomer, 0.1-15 parts of macromonomer, 0.05-10 parts of hydrophobic monomer, 0.1-50 parts of surfactant and 60-1000 parts of deionized water to a three-necked reaction flask, adjusting the pH to be 3-9, adding 0.002-1 part of initiator (persulphate) at 30-75 DEG C after introducing N2 for 30min, reacting for 8-36h to obtain the quadripolymer PACH, diluting with water, and obtaining concentrated PACH solution. The macromonomer with a long chain and the hydrophobic monomer with a molecular association function are simultaneously introduced in a copolymer PACH, which can obtain the best synergistic viscosifying between rigid conformation of a molecular chain and molecular association and salt resistance. The non-linear associated water soluble quadripolymer is obtained. The copolymer is prepared into aqueous solution with the mass concentration of 0.2-3g/l and the surfactant concentration of 0.01-2mmol/l, added to a mixing vessel with a stirring device and evenly stirred at the room temperature to obtain a viscosified, salt-resistant and shear-resistant polymer oil displacement agent. The PACH has dual functions of a viscosifier and a high molecular surfactant; minute amount of a low molecular surfactant is added to the PACH solution, thus improving the apparent viscosity of the solution, reducing the surface tension of solution and the water-oil interfacial tension, and being beneficial to improving the crude oil recovery ratio. A copolymer PABE is prepared into the aqueous solution with the mass concentration of 0.05-7% to obtain high molecular surfactant with excellent surface activity, and the high molecular surfactant is used as an emulsifier, a demulsifier, a solubilizer and a wetting agent.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Salt- and temperature-resistant emulsification viscosity reducer for heavy oil

The invention relates to a salt- and temperature-resistant emulsification viscosity reducer for thick oil. The emulsification viscosity reducer is applied in oil fields for emulsification viscosity reduction of heavy oil and super heavy oil and is characterized by comprising the following components by mass: 1 to 5 parts of sulfonate anionic surfactant, 0.2 to 1 part of disodium monolauryl sulfosuccinate, 0.2 to 1 part of polyoxyethylene nonylphenyl ether disodium monoester sulfosuccinate, 0.7 to 2 parts of polyoxyethylene ether ester salt, 1 to 3 parts of polyoxyethylene nonylphenyl-polyoxypropylene alcohol ether block copolymer, 0.5 to 1 part of carboxymethyl polyoxyethylene ether, 0.5 to 1 part of organic amide polyoxyethylene ether, 0.7 to 2 parts of polyoxyethylene polyoxypropylene polyethylene polyamine, 0.5 to 1 part of sulfonate polyacrylamide, 0.1 to 0.7 part of nonionic fluorocarbon surfactant, 0.2 to 0.5 part of a modification nanometer auxiliary agent, 0.3 to 1 part of an alkalescence auxiliary agent and 10 to 200 parts of water. The beneficial effects of the emulsification viscosity reducer are as follows: salt resistance is up to 24*10<4> mg/L, resistance to a temperature as high as 150 DEG C is realized, and emulsification viscosity reduction of super heavy oil with a viscosity of 500 Pa.s at a temperature of 50 DEG C is realized.
Owner:PETROCHINA CO LTD

Polymer microspheres for high temperature hypersalinity reservoir deep profile control and preparation method thereof

The invention provides polymer microspheres for high temperature hypersalinity reservoir deep profile control and a preparation method thereof. In the method, based on the method that photopolymerization is used to prepare the polymer microspheres, heat and salt resistance polymer materials such as sodium 3-acryloylamino-3-methyl butyrate, 2-acryloylamino-2-methylpropane sulfonic acid, acrylamide monomer and the like and water-soluble anionic monomer are adopted and dispersant and cross-linking agent are added as so to form oil-water mixed emulsion in the mixed medium of surfactant and solvent; then initiator is decomposed by ultraviolet through photopolymerization under controllable temperature so as to initiate emulsion polymerization and 50-500nm of microspheres are formed. The invention utilizes the ability of microspheres that microspheres can be dispersed in arbitrary concentration and injected in the water and can gradually swell after entering in depth of the formation to plug the pore throat so as to effectively plug the high permeable strip of the formation, expand the water swept volume, significantly increase crude oil recovery of water flooding reservoir and is applicable to high temperature hypersalinity reservoir deep profile control.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA) +4

Waterborne epoxy acrylate-grafted composite emulsion and preparation method thereof

The invention relates to the field of manufacture of epoxy acrylate composite resin materials, in particular to a waterborne epoxy acrylate-grafted composite emulsion and a preparation method thereof. The process mainly comprises the following steps of: firstly, by taking a polymerizing monomer as a dispersing medium, enabling epoxide resin and acrylic acid to react under the action of tetrabutylammonium bromide to generate an epoxy acrylate monomer; and secondly, pre-emulsifying the epoxy acrylate monomer and other monomers and then enabling the epoxy acrylate monomer and other monomers to generate a copolymerization reaction to prepare the waterborne epoxy acrylate-grafted composite emulsion by adopting a semi-continuous seeded emulsion polymerization method. According to the process, the copolymerization monomer is used as a solvent dispersing medium for the esterification reaction of the epoxide resin and the acrylic acid in the first step and is also a monomer of the copolymerization reaction in the second step; an organic solvent in the reaction of the first step is prevented from being removed by adopting reduced pressure distillation, so that the influence of residual solvent on the performance of the product is avoided; the waterborne epoxy acrylate-grafted composite emulsion has high grafting rate and can be used for improving the compatibility of the epoxide resin and acrylic acid resin and enhancing the performances of the water resistance, the adhesive force, the salt resistance and the like of a coating and can be widely applied to the fields of metal coatings, building coating materials and the like.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY

Method for treating or recycling waste water with high salt content and applications

The invention provides a method for treating or recycling waste water with a high salt content and applications. The method adopts combination processes of pretreatment, a high-efficiency aeration biological filter and depth treatment; and the detail process is shown in the description. The method of invention has the advantages of rapid degradation speed of the high-efficiency aeration biological filter to the pollutants in waste water, high treatment efficiency, good salt resistance, strong anti-impact capacity, stable operation and less sludge generation amount, and being beneficial for enrichment of halotolerant bacteria; the high-efficiency aeration biological filter is taken as a pretreatment process of the membrane treatment, which can effectively prevent membrane surface from scaling, prevent the membrane from being polluted and plugged by colloidal substances, suspended solid grains, organic matters and microorganisms, prolongs reverse purging period, increases the service life of the membrane, keeps stable water generation amount of a membrane system, thus lowering the operation cost. The invention is not only suitable for standard discharge or recycling of concentrated solution before the membrane separation in a membrane separation process, bus also suitable for treatment and recycling of waste water with a high salt content, such as oil extraction waste water and the like, and transformation and upgrading of the existing engineering.
Owner:周兆宇

High-temperature resistance base fluid for well cementing of oil gas well, preparation method and application thereof

ActiveCN101775273AImproved rheological propertiesAddition to spacer fluid rheology has little effect on rheologyDrilling compositionFiberAlkaline earth metal
The invention relates to a high-temperature resistance base fluid for well cementing of an oil gas well, which belongs to the filed of oil drilling. The base fluid comprises the following ingredients in parts by weight: 100 parts of water, 6 to 20 parts of high molecular tackifiers, 1 to 8 parts of surface active agents, 1 to 8 parts of shale stabilizing agents and 2 to 15 parts of high-temperature stabilizing agents, wherein the high molecular tackifiers are selected from at least one material of biogum and high molecular fiber polymers, the surface active agents are negative ion surface active agents, the shale stabilizing agents are alkaline earth metal salt, and the high-temperature stabilizing agents are clay minerals. A preparation method comprises the following steps: heating the water; adding each ingredient at the same time of agitation; and then carrying out heat preservation and agitation to obtain the base fluid with the pH value between 6 and 9 and the viscosity between 40 and 180 mPa.s. A flushing fluid can be obtained through diluting the base fluid by water according to a weight ratio of 1/ (5 to 10), and an isolation fluid can be obtained through adding weighting agents into the flushing fluid. The isolation fluid obtained by the method has the advantages of high temperature resistance, good salt resistance performance and freely adjustable density, and has wide application ranges and application prospects.
Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of amphoteric retanning fatliquor

The invention provides a preparation method of amphoteric retanning fatliquor. The preparation method comprises the steps of: carrying out amidate modification on oil; adding natural animal or vegetable oil, monoethanolamine and a first catalyst to a reactor which is provided with a mixer and a thermometer for being uniformly mixed, and then heating to react to obtain a system A; carrying out esterification modification, and adding maleic anhydride and a second catalyst in the system A, and uniformly mixing, and then heating to react, and cooling after the completion of the reaction, neutralizing the pH of the system into 7.0 through an alkaline aqueous solution, thus obtaining a system B; carrying out polymerization reaction, heating the system B, and synchronously dropwise adding acrylic acid derivatives, an amino cationic vinyl monomer aqueous solution and an initiator aqueous solution, and then heating to react, thus obtaining a system C; and compensating and metering water, and adjusting the content of effective solid in the system C to obtain the amphoteric retanning fatliquor. The amphoteric retanning fatliquor has high acid resistance, alkali resistance, salt resistance and electrolyte resistance, and is suitable for amphoteric retanning fatliquoring technologies under various conditions.
Owner:SHAANXI UNIV OF SCI & TECH

Slow-expansion water-absorbable salt-resistant gel particle, and preparation and applications thereof

The invention relates to a slow-expansion water-absorbable salt-resistant gel particle, and preparation and applications thereof. The gel particle relates to crosslinked gel having a net structure and formed by reactions of following raw materials: A), an acrylamide monomer, B) acrylic acid, C) a crosslinking agent, D) a salt-resistant crosslinking agent, E) an initiator that is persulfate, F) a reinforcing agent, G) a pH value conditioning agent, H) a foaming agent and I) water. The gel particle is a gel particle modifying and flooding agent having slow expansion performance, strong water absorption performance and salt resistance. The gel particle slowly absorbs water and expands when encountering water, and along with construction, the gel particle blocks, in the deep stratum, cracks or large pores and channels, thus adjusting water absorption profiles, diverting liquid streams, reducing inert areas in oil deposits, increasing production of oil of an oil well, and achieving a function of increasing the oil recovery rate of the oil deposits. The gel particle is low in expansion in construction processes, so that pressure rise is small, and the gel particle is suitable for profile control of a water injection well having low permeability and high water injection pressure.
Owner:PETROCHINA CO LTD

Preparation method of polyester resin used in outdoor weatherable powder paint

The invention discloses a preparation method of polyester resin used in outdoor weatherable powder paint. The method comprises the steps that: (1) washed, impurity-removed, and crushed PET raw material is subjected to a trans-esterification reaction with dihydric alcohol with a boiling point higher than that of ethylene glycol under the existence of a trans-esterification catalyst; after the trans-esterification reaction is finished, polyol, polyacid/anhydride, and a stabilizer are added; an esterification reaction is carried out under the effect of an esterification catalyst; isophthalic acid and a curing accelerator triphenylphosphine are added, and a stirring reaction is carried out, such that the polyester resin used in outdoor weatherable powder paint is obtained. The polyester resin has the characteristics of outdoor weatherability, baking resistance, salt spray resistance, and the like of a powder paint synthesized and produced by using weatherable polyester resin, and has good gloss, impact resistance, and excellent leveling performance. The pollutions to the environment caused by polyester waste material and esterification water produced in purified terephthalic acid synthesis are reduced. Therefore, the technical scheme provided by the invention is environment-friendly.
Owner:江苏宝田新材料股份有限公司

Preparation method of super wetting titanium dioxide nanorod porous membrane and application of super wetting titanium dioxide nanorod porous membrane to emulsion separation

The invention discloses a preparation method of a super wetting titanium dioxide nanorod porous membrane and application of the super wetting titanium dioxide nanorod porous membrane to emulsion separation, and belongs to the technical field of function materials. The method comprises the following steps: preparing a PVP/TiO2 composite fiber membrane through an electrospinning technology, and drying the composite fiber membrane in a drying oven; laying the dried composite fiber membrane in a muffle furnace for calcining the composite fiber membrane for a certain period, removing organic carbon in the composite fiber membrane, calcining the composite fiber membrane to form an inorganic TiO2 fiber membrane, vertically laying the calcined inorganic TiO2 fiber membrane into a hydrothermal polymeric pecursor solution in a polytetrafluoroethylene liner, and performing a hydrothermal reaction, so as to obtain a super-hydrophilicity and underwater super-oleophobicity porous super wetting micro-nano composite structure membrane. The obtained membrane has high environmental stability, namely acid resistance, alkali resistance and salt resistance, and can be applied to sewage treatment in harsh acid and alkali salt environments, so that the efficient separation of a corrosive emulsion is realized, and e the application value is high. The preparation method is simple, and is convenient, efficient and rapid for emulsion separation.
Owner:BEIHANG UNIV
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