8results about How to "Good viscosity reduction" patented technology

The invention discloses a composite viscosity reducer and an oil extraction and viscosity reduction process thereof, and belongs to the technical field of petrochemical engineering. The composite viscosity reducer comprises an amphiphilic copolymer, sodium fatty alcohol polyoxyethylene ether sulfonate, modified nano silicon dioxide and water, wherein the composite viscosity reducer is prepared from 0.5 to 5 weight percent of amphiphilic copolymer, 0.05 to 2 weight percent of fatty alcohol polyoxyethylene ether sodium sulfonate, 5 to 15 weight percent of modified nano silicon dioxide and the balance of water. The composite viscosity reducer has good temperature resistance and can adapt to a complex oil reservoir environment, and the composite viscosity reducer can be matched with a hydrodynamic cavitation transducer, so that sodium fatty alcohol polyoxyethylene ether sulfonate can be fully mixed and emulsified with crude oil, the crude oil is heated, and the oil displacement and viscosity reduction effects are further improved.

The invention discloses a nano-particle type thick oil viscosity reducer as well as a preparation method and application thereof, and belongs to the technical field of thick oil chemical additives. The preparation method comprises the following steps: dissolving 1 part of anhydrous citric acid, 2-2.7 parts of benzylamine and 0.3-1 part of octadecylamine in an ethanol solution according to a molar ratio, and uniformly stirring; then putting the mixture into a reaction kettle to react at a constant temperature of 180 DEG C, and cooling to obtain a crude product; and concentrating, dialyzing and purifying the crude product, and drying to obtain the nano-particle type thick oil viscosity reducer. According to the thick oil viscosity reducer, a polymer with a good viscosity reduction effect is formed through molecular design, and due to the fact that the molecular weight of the polymer is small, the polymer is in a nano-particle form on the microscopic scale, and based on the surface effect and the high specific surface area of nano-particles, the polymer has good dispersing performance and infiltration capacity; the nanometer effect further promotes the functional groups in the viscosity reducer molecules to depolymerize asphaltene aggregates in the thickened oil, and the viscosity reducer shows a good viscosity reduction effect. And the process is simple and easy to control, does not use toxic solvents, and is very environment-friendly.

The invention provides a lithium battery positive electrode slurry dispersing agent as well as a preparation method and application thereof. The monomer components for preparing the lithium battery positive electrode slurry dispersant comprise 10%-15% of a polymeric monomer containing aromatic nucleus and / or organic amine, 5%-10% of a polymeric monomer containing phosphate and / or carboxylate and / or sulfonate, 65%-75% of an olefin polymeric monomer and 5%-15% of a polyether / polyester / phosphate polymeric monomer containing 2-10 carbon atoms and having a small and long chain structure. The dispersing agent disclosed by the invention has good dispersity on a conductive agent and a positive electrode material, has high stability and excellent viscosity reduction effect, has excellent impedance reduction effect, has advantages on pole piece resistance and four probes, can exert good dispersity by a small addition amount, is beneficial to exerting battery energy, and can be applied to the field of lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. The method can be widely applied to lithium battery positive electrode slurry.

The present application discloses a nanoparticle type heavy oil viscosity reducer and its preparation method and application, which belongs to the technical field of heavy oil chemical additives. The preparation method is to take 1 part of anhydrous citric acid, 2 to 2.7 parts of benzylamine and 0.3 to 1 part of octadecylamine in molar ratio, dissolve them in ethanol solution, and stir them evenly; then put them into a reactor for constant temperature reaction at 180°C, and obtain a crude product after cooling; the crude product is concentrated and purified by dialysis, and the nanoparticle type heavy oil viscosity reducer is obtained after drying. The heavy oil viscosity reducer provided by the present application forms a polymer with good viscosity reduction effect through molecular design, and due to its small molecular weight, it presents a nanoparticle form at the microscopic level. Based on the surface effect and high specific surface area of ​​nanoparticles, it has good dispersibility and penetration ability; the nano effect further promotes the depolymerization of asphaltene aggregates in heavy oil by the functional groups in the viscosity reducer molecules, showing a good viscosity reduction effect. And the process is simple and easy to control, does not use toxic solvents, and is very environmentally friendly.

The invention belongs to the field of amphiphilic polymer viscosity reducers, and particularly relates to a preparation method and application of an acrylate composite viscosity reducer. The preparation method comprises the following steps: preparing a pre-emulsion: firstly, magnetically stirring an emulsifier and deionized water at room temperature; sequentially adding butyl acrylate, ethyl methacrylate, acrylic acid, N-hydroxymethyl acrylamide, glycidyl methacrylate, an initiator and a reducing agent to prepare a pre-emulsion; (2) synthesizing a seed emulsion: stirring and heating the obtained partial pre-emulsion, adding a reducing agent aqueous solution for the first time, then adding an initiator aqueous solution, adding the reducing agent aqueous solution for the second time, adjusting the temperature, and adding the reducing agent aqueous solution for the third time; and (3) when the seed emulsion shows a blue phase, adding the rest pre-emulsion and the initiator aqueous solution at the same time to obtain a target product. The method has the advantages of high synthesis efficiency, good thermal stability of the target product, uniform dispersion in water, improvement of the fluidity of the thickened oil, and effective reduction of the viscosity of the thickened oil.

The invention provides a high-voltage-resistant lithium battery positive electrode slurry dispersing agent as well as a preparation method and application thereof. The monomer components for preparing the lithium battery positive electrode slurry dispersant comprise 10%-15% of a polymeric monomer containing aromatic nucleus and / or organic amine, 5%-10% of a polymeric monomer containing phosphate and / or carboxylate and / or sulfonate, 65%-75% of an olefin polymeric monomer and 5%-15% of a polymeric monomer containing a fluorocarbon bond / phosphorus-carbon double bond. The dispersing agent disclosed by the invention is excellent in dispersing effect, has a good dispersing effect on positive electrode main materials (LFP, LCO, NCM and the like) and conductive agent materials (CNT, SP and the like), and has great advantages on viscosity reduction, solid improvement, coating, impedance reduction and the like; and the high-voltage resistance is good, and the withstand voltage is up to 6V.

This invention relates to a composite self-lubricating coating for low- and medium-carbon steel materials and its preparation method. The coating comprises a wear-resistant deposited layer on the surface of the low- and medium-carbon steel material and a self-lubricating layer sprayed onto the surface of the deposited layer. The wear-resistant deposited layer is a tungsten carbide deposited layer, and the self-lubricating layer is a molybdenum disulfide self-lubricating layer. A scaly tungsten carbide deposited layer is formed on the surface of the low- and medium-carbon steel material using electrical discharge deposition (EDD) technology. Then, molybdenum disulfide is sprayed onto the tungsten carbide deposited layer using a spraying technique to form the self-lubricating layer. After baking and cooling, the composite self-lubricating layer is formed. The combination of tungsten carbide and molybdenum disulfide significantly improves the wear resistance and hardness of the material, especially in applications under abrasive wear environments, effectively extending the service life of the workpiece. Furthermore, the process provided by this invention is simple, easy to operate, has low equipment costs, and is easily achievable for large-scale mass production.

The invention discloses a carbon quantum dot asphaltene inhibitor modified by a hydrophobic long carbon chain as well as a preparation method and application of the carbon quantum dot asphaltene inhibitor, and belongs to the technical field of oil field plug removal. The preparation method comprises the following steps: dissolving citric acid and ethidene diamine in distilled water, and after a heating reaction is finished, centrifugally collecting supernate to obtain a carbon quantum dot solution; adding an inorganic acid solution, and carrying out oxidation reaction, washing and drying to obtain carboxylated carbon quantum dots; the preparation method comprises the following steps: preparing a hydrophobic long carbon chain modified carbon quantum dot asphaltene inhibitor, uniformly mixing the hydrophobic long carbon chain modified carbon quantum dot asphaltene inhibitor with N-amino polyhexylamine and a solvent, adding a coupling agent, carrying out an amidation reaction, and carrying out rotary evaporation, water washing, centrifugation and drying to obtain the hydrophobic long carbon chain modified carbon quantum dot asphaltene inhibitor. Strong adsorption is formed through interaction with asphaltene molecules through pi-pi interaction, electrostatic attraction, hydrogen bonds, Van der Waals force and the like. The grafted hydrophobic long carbon chain forms large steric hindrance among asphaltene molecules, formation of large-scale parallel stacking is hindered, direct contact and aggregation of the asphaltene molecules are prevented, and the efficiency of the inhibitor is remarkably improved.