128 results about "Dispersit" patented technology

The invention relates to a preparation method and application of a composite leakage-proof agent while drilling, and belongs to the technical field of petroleum drilling engineering. The composite leakage-proof agent while drilling is prepared from the following components in percentage by mass: 20-45% of nano composite particles, 15-35% of a multi-stage fiber reinforced network material, 10-20% of an intelligent response blocking agent, 5-10% of a high-temperature-resistant additive, 1-5% of a dispersing agent and the balance of deionized water, wherein the sum of the contents of all the components is 100%. According to the composite leak-proof agent while drilling provided by the invention, the temperature-sensitive resin with a core-shell structure is introduced, so that a three-dimensional synergistic mechanism of nano-composite particle filling-multistage fiber network bridging-intelligent response curing is realized, and efficient and environment-friendly plugging of an ultrahigh-temperature and high-pressure stratum is realized. The success rate of one-time plugging is increased from 45% to 92%, the average operation time is shortened by 60%, and an efficient solution is provided for deep and ultra-deep drilling.

The invention relates to the technical field of polyurethane adhesives, in particular to an adhesive for tooling polished aluminum and a preparation method thereof. The adhesive comprises a component A and a component B, wherein the raw materials for preparing the component A comprise at least 25-40 parts of a polyol composition, 50-75 parts of a calcium filler, 0.1-0.3 parts of a dispersant, 0.1-0.3 parts of a catalyst, 1-4 parts of a molecular sieve, 0.01-0.2 parts of a defoamer and 0.1-0.5 parts of nano silicon dioxide, and the component B comprises at least isocyanate. By controlling the selection and coordination of the polyol, the dispersant and the catalyst in the system and the addition amount of each raw material, when the provided adhesive is used for bonding the polished aluminum (1-2 mm) to a honeycomb panel, the roller peel strength is ≥60 N*mm / mm, thereby meeting the actual external wall application requirements.

The invention discloses a defoaming agent for an oil field, and relates to the technical field of chemistry. The defoaming agent is prepared from the following materials in parts: 20 to 50 parts of polyether modified silicone oil, 10 to 30 parts of an organic silicon defoaming agent, 15 to 35 parts of polyoxyethylene fatty acid, 25 to 45 parts of polydimethylsiloxane emulsion, 5 to 15 parts of an emulsifier, 3 to 10 parts of a thickening agent, 2 to 8 parts of a dispersing agent, 0.5 to 3 parts of a pH regulator and 50 to 100 parts of deionized water. The invention further discloses a preparation method of the defoaming agent for the oil field. According to the defoaming agent and the preparation method thereof, the defoaming agent is prepared according to a specific proportion, uniform dispersion and stable compatibility of all the components are ensured through a scientific preparation technology, and therefore the defoaming agent is endowed with excellent defoaming and foam inhibiting performance, and the defoaming agent has good defoaming and foam inhibiting effects in the specific application process. The defoaming agent can quickly eliminate foams generated in the oilfield exploitation process, obviously reduce the influence of the foams on the oil well yield, reduce the exploitation cost and ensure the smooth operation of exploitation equipment.

The invention relates to the technical field of fire coal additives, in particular to a high-efficiency coal saving agent and a preparation method thereof. The coal saving agent is prepared from the following raw materials in percentage by mass: 7-14% of an oxygen supply agent, 5-12% of a combustion improver, 5-13% of a catalyst, 0.1-1% of industrial waste residues, 1-3% of a desulfurization additive, 1-2% of a dispersing agent and the balance of deionized water, wherein the catalyst is a Ce-Mn / TiO2 catalyst, and the catalyst is a TiO2 catalyst; the industrial waste slag is selected from at least one of cold-rolled iron oxide slag, nickel slag or steel slag; the desulfurization additive is selected from at least one of calcium acetate, calcium oxide or calcium carbonate. The coal-saving agent can effectively improve the combustion characteristic of coal, improve the combustion efficiency and the combustion effect, and realize the efficient coal-saving effect under the condition of low mixing amount; meanwhile, desulfurization and denitrification can be achieved, emission of sulfide and nitric oxide is reduced, and environmental pollution can be prevented and controlled.

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine (HICE) during operation of the engine. The method includes the steps of: a) providing to the HICE a lubricating oil composition including or resulting from the admixing of: i) a base oil having a KV100 of less than or equal to 12 cSt and included at greater than 40 wt.% of the composition and comprising a Group I base oil, a Group II base oil, or combinations thereof; ii) at least one optionally borated polyisobutylene succinimide (PIBSA-PAM) dispersant at from 0.25 wt.% to 12.0 wt.% of the composition, wherein the optionally borated PIBSA-PAM dispersant is selected from the group consisting of lower molecular weight PIB SA-PAM dispersant (Mn less than 1600 g / mol), higher molecular weight PIBSA-PAM dispersant (Mn 1600 g / mol or more), and combinations thereof; iii) at least one overbased metal containing detergent with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at a treat level to deliver between 100 to 5000 ppm by weight of total metal and between 0.15 wt. % to 8.0 wt. % of total soap to the composition; and iv) the lubricating oil composition having a total sulfated ash of less than or equal to 2.5 wt.%, a total phosphorous level of less than or equal to 0.120 wt.%, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50 or 60; and b) providing a fuel comprising hydrogen to the hydrogen fueled internal combustion engine; and c) combusting the fuel in the hydrogen fueled internal combustion engine. Also provided are lubricating oil compositions for use in a HICE to reduce the propensity for abnormal combustion events.

The invention relates to the technical field of marine fuel oil additives, and particularly provides a marine fuel oil purification synergist and a preparation method thereof. The marine fuel oil purification synergist comprises the following components in percentage by mass: 8%-12% of a sulfur capturing agent, 15%-20% of a core-shell dispersing agent, 5%-8% of a lubricating agent, 0.5%-1% of an antioxidant, 1%-2% of a pour point depressant and the balance of a solvent. The marine fuel oil purification synergist has the advantages of high flash point, sulfur inhibition, combustion enhancement and dispersion stability. The multi-component synergistic system not only greatly improves the combustion efficiency of the marine fuel oil, but also effectively inhibits the emission of harmful substances, obviously reduces the carbon deposition and wear of an engine, and keeps the cleanliness of a fuel oil system. In practical application, the synergist shows excellent environment-friendly benefits and economic benefits, and a green fuel solution which can meet increasingly strict requirements of environment-friendly laws and regulations and can reduce the operation cost is provided for the ship industry.

This invention relates to the field of special agents for treating air pollution, specifically to a rare earth water-based environmentally friendly urea crystal remover for vehicles and its preparation method. The raw materials for preparing the rare earth water-based environmentally friendly urea crystal remover for vehicles, by weight, include: 0.005-0.2 parts rare earth-based catalyst, 3-10 parts surfactant, 1-3 parts dispersant, 5-10 parts stabilizer, and 80-100 parts deionized water; wherein the rare earth-based catalyst includes at least a cerium-based catalyst. The urea crystal remover provided by this invention has excellent performance, effectively removing urea crystals, and the cerium emission concentration is far below the requirements of the EURO 7 draft (EURO 7 does not require cerium). NOx conversion rate is significantly improved, making it more suitable for vehicles using high-sulfur fuels, and greatly benefiting the control of air pollution from mobile sources. It is also environmentally safe and environmentally friendly.

The invention belongs to the technical field of data center cooling, and discloses a narrow fraction mineral base oil single-phase immersed cooling liquid and a preparation method thereof in order to solve the problem of poor stability of the cooling liquid, and the preparation method comprises the following steps: preparing a dispersant; the preparation method comprises the following steps: adding an antioxidant and nano heat-conducting particles into narrow fraction mineral base oil, and stirring to obtain a product a; heating narrow fraction mineral base oil, adding a dispersing agent and an anti-rust agent, and stirring to obtain a product b; and finally mixing and stirring the product a and the product b. The cooling liquid provided by the invention takes the narrow fraction mineral base oil as a matrix, solves the problems of poor heat dissipation, weak oxidation resistance and low flash point of the traditional mineral oil through the synergistic effect of all the components, has low viscosity, high flash point, excellent electrical insulation and thermal conductivity, good compatibility and low volatilization rate, is suitable for immersed cooling systems such as a large computing power data center, and has wide application prospects. The high-efficiency heat dissipation and safe operation requirements of high-heat-density equipment can be met, the preparation process is simple, the cost is low, and the industrial application value is good.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

The invention discloses a plugging material as well as a preparation method and a use method thereof, and relates to the technical field of plugging of a petroleum engineering technology. Comprising the following components: 3%-5% of starch, 2%-6% of vegetable gum, 16%-25% of a polymeric monomer compound, 5%-8% of a pH regulator, 0.05%-0.1% of a curing agent, 4%-12% of a gelation reagent, 3.2%-9.6% of a gelation auxiliary agent, 1%-4% of a dispersing agent, 0.05%-1% of an initiator, 3%-5% of a capsule gel breaker and the balance of water. The plugging material has good pumping performance on the ground, has certain viscosity, can be kept in a slug flow state in the pumping process, avoids leakage or formation of a half-section slug during waiting for cementing (gelling and curing), can realize rapid plugging after chemical reaction gelling at the bottom of a well, and has the advantages of high plugging efficiency and high plugging efficiency. And after the subsequent operation is completed, the plugging agent can be degraded and dissolved under the combined action of the formation temperature and the capsule gel breaker, so that the plugging purpose is achieved.

The invention belongs to the technical field of building materials, and discloses a shield and TBM sludge curing agent and a preparation and application method thereof.The sludge curing agent comprises an inorganic curing component and an organic curing component, and the sum of the mass percent of the inorganic curing component and the mass percent of the organic curing component is 100%; the inorganic curing component comprises industrial waste residues and an acid exciting agent, and the industrial waste residues account for 65%-78% of the sludge curing agent by mass; the acid exciting agent accounts for 8%-15% of the sludge curing agent in percentage by mass; the organic curing component is a gel monomer and accounts for 10-20% of the sludge curing agent in percentage by mass; the sludge curing agent further comprises an additionally-added regulation and control auxiliary agent, and the regulation and control auxiliary agent comprises the following components in percentage by mass: 2-8% of a retarder, 1-5% of a water repellent and 2-10% of a dispersing agent. The invention has the advantages that the shield muck is efficiently cured through the dual-curing effect of the inorganic curing component and the organic curing component, and the synergistic improvement of the flowing property and the mechanical property of the synchronous grouting liquid is realized under the synergistic effect of the retarder, the dispersing agent and the water repellent.

The invention relates to the technical field of dirt cleaning agents, in particular to a complex dirt removing and preventing chelating cleaning agent for an oil field pipeline oil well and a preparation process thereof, and the cleaning agent comprises an organic chelating agent, a dispersing agent, a polymer activator, a mutual solvent, 1%-5% of a corrosion inhibitor and 50%-83% of deionized water. The target cleaning agent is obtained by quantitatively weighing all the effective components, compounding all the components step by step, adding deionized water into all the effective components, and uniformly mixing, so that various complex scales such as barium and strontium scales generated by oil field pipelines, oil wells and the like can be solved; and the cleaning agent has good cleaning and anti-scaling effects on barium and strontium scales and other complex scales. The efficient polymer activator and the neutral corrosion inhibitor added in the invention can effectively inhibit the formation of calcium strontium barium sulfur salt, carbonate scale and iron oxide precipitate in the oilfield water injection system, effectively reduce the corrosion rate and prolong the service life of equipment.

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine (HICE) during operation of the engine. The method includes the steps of: a) providing to the HICE a lubricating oil composition including or resulting from the admixing of: i) a base oil having a KV100 of less than or equal to 12 cSt and included at greater than 50 wt.% of the composition and comprising a Group I base oil, a Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof; ii) at least one borated polyisobutylene succinimide (PIBSA-PAM) dispersant at from 0.25 wt.% to 8.0 wt.% of the composition to deliver from 30 to 1000 ppm by weight of total boron to the composition, wherein the borated PIBSA-PAM dispersant is selected from the group consisting of lower molecular weight PIBSA-PAM dispersant (Mn less than 1600 g / mol), higher molecular weight PIBSA-PAM dispersant (Mn 1600 g / mol or more), and combinations thereof; iii) at least one overbased metal containing detergent with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at a treat level to deliver between 100 to 5000 ppm by weight of total metal and between 0.15 wt. % to 8.0 wt. % of total soap to the composition; and iv) the lubricating oil composition having a total sulfated ash of less than or equal to 2.5 wt.%, a total phosphorous level of less than or equal to 0.120 wt.%, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50 or 60; b) providing a fuel comprising hydrogen to the HICE; and c) combusting the fuel in the HICE. Also provided are lubricating oil compositions and concentrates for use in a HICE to reduce the propensity for abnormal combustion events.

The invention belongs to the technical field of heat-conducting silica gel gaskets, and particularly relates to a rebounding heat-conducting silica gel gasket and a preparation method thereof.The rebounding heat-conducting silica gel gasket is prepared from, by weight, 100 parts of vinyl silicone oil; 600 to 1000 parts of a treated heat-conducting filler with a large particle size; 100 to 300 parts of small particle size spherical alumina; 10 to 30 parts of graphene slurry; 5-10 parts of hydrogen-containing silicone oil; and 0.2 to 0.5 part of a catalyst. A high-efficiency heat-conducting network is constructed through graphene, and a combination of a mixture of large-particle-size spherical aluminum nitride and spherical aluminum oxide and small-particle-size spherical aluminum oxide is combined; meanwhile, the gasket is endowed with excellent resilience through a chelating dispersant enhanced cross-linked network, surface elastic coating treatment of the large-particle-size heat-conducting filler and a synergistic effect of graphene, and excellent balance of high heat conductivity and high resilience is realized.

The invention discloses a novel mixed water-based fuel and a processing method thereof, and belongs to the technical field of fuel preparation. The novel mixed water-based fuel is prepared from the following components in percentage by weight: 30% of water, 25% of heavy aromatics, 20% of base oil, 10% of a catalyst, 10% of a dispersing agent, 3% of an environment-friendly detergent and 2% of a combustion improver. The processing method comprises the following steps: putting the purified water into a stirring container, sequentially adding the heavy aromatics, the base oil and the catalyst, and uniformly stirring; heating to 40 + / -5 DEG C, adding a dispersing agent, and stirring; and cooling, adding the combustion improver and the environment-friendly detergent, and uniformly stirring. The formula is scientific and reasonable, the synergistic effect of all the components is remarkable, and the prepared fuel system is stable, full in combustion, low in pollutant emission and outstanding in energy-saving and environment-friendly effect; the processing method is simple and easy to implement, controllable in operation and high in safety, production conditions are easy to realize, dual requirements of laboratory preparation and large-scale industrial production can be met, and the method has a good application prospect.

The application discloses a solid waste-based self-compacting super-waterproof backfill material and a preparation method thereof, and the solid waste-based self-compacting super-waterproof backfill material is formed by mixing and stirring slag and a solid waste-based high-impervious curing agent and water; the solid waste-based high-impervious curing agent comprises steel slag powder, granulated blast furnace slag, fly ash, red mud, industrial by-product gypsum, hydrophobic organic acid salt, alkali metal lactate, high-performance polycarboxylate water reducer and dispersant. Physical-chemical reactions occur in the mixing and stirring, a large amount of cementing bodies are generated in the curing process, the inter-particle pores of soil are filled, the structure is compacted, the strength is high, and the imperviousness is good; the application focuses on the solid waste resource utilization demand, has the advantages of high solid waste utilization rate, low economic cost, high fluidity, good waterproof performance and the like; and the application changes the need of adding cement clinker in traditional backfill materials, and is more economical and environment-friendly.

The present invention belongs to the field of metal surface treatment and relates to a composite boronizing agent and a solid boronizing method for oil pipes. The composite boronizing agent comprises a boronizing agent and graphite. Calculated on the basis of mass percentage, the graphite is 10-14% of the mass of the boronizing agent. The boronizing agent comprises the following raw materials in mass percentages: boron source: 10-15%, catalyst: 12-20%, activator: 8-10%, dispersant: 4-6%, filler: 50-55%, and flow aid: 8-12%, and the dispersant is triethanolamine borate. In the composite boronizing agent of the present invention, the triethanolamine borate can remove impurities from an inner surface of an oil pipe, improve the boronizing effect and boronized layer quality, and form a protective film to prevent carburization, promote boronizing, and enhance boronized layer bonding strength. In addition, through the combined action of triethanolamine borate and graphite, the boronizing agent can be prevented from agglomerating or adhering to the inner surface of the oil pipe after boronizing treatment, and the uniformity of boronizing can further be improved.

The invention discloses carboxyalkylated lignin as well as a preparation method and application thereof in coal gasification wastewater coal slurry, and belongs to the technical field of coal water slurry. The carboxyalkylated lignin with a three-dimensional structure is obtained by introducing a carboxyalkyl branched chain into a lignin structure through a graft copolymerization method. The preparation method comprises the following steps: dissolving lignin in deionized water or isopropanol, adjusting the pH value to 11-12, adding a reaction reagent with a carboxyl functional group and an alkyl chain, and reacting in a water bath at 60-80 DEG C for 2-4 hours; then adjusting the pH value to 6-7; and washing, centrifuging and purifying to obtain the carboxyalkylated lignin. Carboxyalkylated lignin is used as a dispersing agent to be applied to a system for preparing coal water slurry from coal gasification wastewater, coal particles can be fully dispersed and stabilized in a complex coal gasification wastewater system by using fewer adsorption sites, and the carboxyalkylated lignin can be used as the dispersing agent to remarkably improve the slurrying performance and long-term stability of coal gasification wastewater coal slurry.

The invention discloses an oil spill dispersant for efficiently treating water area petroleum pollution, which is characterized by comprising biodiesel, a biological surfactant, a first nonionic surfactant and a second nonionic surfactant, the invention relates to a biodiesel fuel which is prepared from the following components in percentage by mass: 49.35%-79.55% of biodiesel, 5.25%-8.75% of a biological surfactant, 6.40%-17.60% of a first nonionic surfactant and 8.80%-24.30% of a second nonionic surfactant. The oil spill dispersing agent has the advantages that the oil spill dispersing agent is free of secondary pollution to the environment, various technical indexes meet the requirements of the national standard GB 18188.1-2021 Oil spill dispersing agent technical conditions, the biodegradation rate, the flash point, the kinematic viscosity, the emulsification rate, the fish acute toxicity-median lethal time and the like are superior to those of the national standard requirements, and the oil spill pollution of the water area can be efficiently treated.

The invention relates to the field of engine oil, in particular to long-life high-efficiency dynamic equilibrium air compressor oil and a preparation method thereof. The invention relates to long-life high-efficiency dynamic equilibrium air compressor oil, which is prepared from the following raw materials in parts by mass: 90 to 120 parts of base oil system, 1 to 2 parts of antioxidant, 2 to 6 parts of extreme pressure anti-wear agent, 0.3 to 0.6 part of metal deactivator, 0.5 to 1.5 parts of anti-rusting agent, 0.2 to 0.3 part of defoaming agent, 0.5 to 1.2 parts of purification dispersant and 3 to 8 parts of functional auxiliary agent. The finally prepared air compressor oil not only has the effects of long service life, high energy efficiency and the like, but also can keep comprehensive properties such as oxidation resistance, detergency and anti-foaming property at the same time so as to meet the increasing application requirements of air compressors.

The invention relates to the technical field of nickel-based red mud material preparation, in particular to a preparation method of a nickel-based red mud material and application of the nickel-based red mud material in condensation catalysis. S2, dissolving nickel nitrate hexahydrate in a modified dispersant, and stirring until the solution is clear to obtain a modified nickel salt solution; s3, slowly adding the modified red mud carrier into the modified nickel salt solution, magnetically stirring, and ultrasonically dispersing to form a suspension; and S4, transferring the suspension to an oil bath pan, heating, continuously stirring until water is evaporated, naturally cooling to room temperature, grinding, putting the ground solid product into a muffle furnace, heating to 400-600 DEG C, and roasting in an air atmosphere to finally obtain the nickel-based red mud material. The preparation method disclosed by the invention is simple, low in cost and wide in raw material source, and has a good industrial application prospect. Compared with a traditional noble metal catalyst, the cost is lower, and more excellent sintering resistance and carbon deposition resistance are shown under the high-temperature reaction condition.

The invention discloses a fifth-generation gasoline detergent and a preparation method and application thereof.The detergent is prepared from, by mass, 5.1%-16% of azole polynitrogen compounds with the carbon atom number being 6-12 and the nitrogen atom number being 3-6, 40.1%-48% of Mannich base detergent dispersants with the number containing C8-14, 5.1%-12% of organic acid R6-12 hydrazine catalytic auxiliaries, 1.4%-3% of antioxidants and 30%-49.5% of C8-12 straight-chain alkane. The preparation method comprises the following steps: mixing the components according to the proportion, and filtering through a 1-1.5 mu m filter screen. The additive amount of the cleaning agent is 200-220 mL / m < 3 >, sufficient combustion of gasoline can be promoted, the emission amounts of CO, HC and NOx in tail gas are reduced by 30%, 33% and 19% respectively, the fuel saving rate reaches 10.24-14.01%, the power of an engine can be improved, and an automobile is assisted to meet the strict emission standard.

The invention discloses a tin-zinc-copper powder ultrafine powder batch preparation process, and relates to the technical field of metal powder preparation, and the tin-zinc-copper powder ultrafine powder batch preparation process comprises the following steps: dissolving tin salt, zinc salt and copper salt in deionized water, adding a complexing agent, and uniformly mixing to obtain a mixed metal salt aqueous solution; dissolving a rosin-based polyamine hyperbranched dispersant in an organic solvent to serve as an oil phase; slowly adding a mixed metal salt aqueous solution into the oil phase, and uniformly dispersing to obtain a water-in-oil microemulsion system; dropwise adding a reducing agent solution, and continuously carrying out heat preservation reaction for 0.5-3 hours after dropwise adding is finished, so as to obtain slurry containing alloy particles; and carrying out demulsification treatment, centrifugal separation, repeated washing and drying to obtain the surface-modified tin-zinc-copper superfine powder. Superfining of particles is achieved through confinement growth, synchronous co-deposition of multi-component elements is guaranteed, a homogeneous alloy phase is formed, component segregation is avoided, and a protective layer formed on the surface of the powder in situ endows the material with excellent oxidation resistance and good weld-aid wettability.

The present invention provides a kind of anti-corrosion low-viscosity solvent-free coating for oil well pipes and its preparation method and application, which belongs to the technical field of coatings. The raw materials for preparing the coating include component A and component B; by mass fraction, the component A includes the following raw materials: phenolic epoxy resin, epoxy reactive diluent, adhesion promoter, filler, leveling agent, dispersant, defoamer, anti-settling agent; the component B includes phthalic anhydride modified polyphenyl ring aromatic amine curing agent; the viscosity of the anti-corrosion low-viscosity solvent-free coating for oil well pipes is 100.1-118.6KU. The coating formed by the coating has high coating hardness, heat resistance and permeability resistance, and meets the high temperature and high pressure autoclave performance requirements in the SY / T6717-2016 standard; the coating has low viscosity and can be sprayed internally without heating using ordinary single-component spraying equipment, which can solve the problem of coating construction inside small-diameter oil well pipes with a pipe diameter of less than 89mm.

The invention discloses a preparation method of modified hydrotalcite lubricating oil with high dispersion performance, and relates to the technical field of lubricating oil, the method comprises the following steps: dropwise adding an alkali solution into a salt solution to obtain a suspension; aging and separating the suspension to obtain a reaction product; the reaction product is washed, dried, ground and sieved, and the ZnMgAl LDH nanosheet is obtained; the preparation method comprises the following steps: modifying a ZnMgAl LDH nanosheet to obtain modified hydrotalcite; and adding the modified hydrotalcite into the base oil to prepare the modified hydrotalcite lubricating oil. The calcium-magnesium-aluminum hydrotalcite is subjected to surface modification through the dispersing agent, on one hand, the compatibility of the hydrotalcite and the lubricating oil base oil is enhanced through the long-chain alkane structure of oleic acid, and the dispersion problem caused by hydrophilicity of the hydrotalcite is solved; on the other hand, by means of a hexagonal layered crystal structure of hydrotalcite, a low-shear-force lubricating film is formed on a friction interface, so that the lubricating performance of the lubricating oil is synergistically improved; in addition, the modified hydrotalcite has good thermal stability at the temperature of about 230 DEG C or below, and is suitable for high-temperature use scenes of the lubricating oil.

To provide a dispersant capable of enhancing dispersibility of a carbonate-blended cement composition.SOLUTION: The present invention provides a dispersant for carbonate-blended cement compositions, such as calcium carbonate, comprising a polycarboxylic acid copolymer containing 1 to 99 wt.% of a composition unit (I) derived from a monomer represented by a general formula (1) and 1 to 99 wt.% of a composition unit (II) derived from a monomer represented by a general formula (2). It is preferable that an average particle size of the carbonate be 1.0 to 100 μm. It is preferable that a weight average molecular weight of the polycarboxylic acid copolymer be 5,000 to 100,000.SELECTED DRAWING: None

The invention discloses a solid-waste-based green nano-composite seed crystal early strength agent and a preparation method thereof, and relates to a green and environment-friendly seed crystal early strength agent. The solid-waste-based green nano composite seed crystal early strength agent is prepared from the following raw materials in parts by weight: 200 to 300 parts of deionized water, 100 to 150 parts of dispersing agent, 200 to 300 parts of Ca (NO3) 2 solution, 100 to 200 parts of Na2CO3 solution, 50 to 100 parts of steel slag powder and 50 to 140 parts of waste concrete recycled micro powder. The solid-waste-based green nano-composite seed crystal early strength agent disclosed by the invention takes the steel slag powder and the waste concrete recycled micro powder as raw materials, is low in cost, reduces the pollution of solid wastes to the environment, is green and environment-friendly, and is simple in process.

The utility model provides a marine spilled oil chemical dispersion device, which comprises a double-shaft motor, the output end of the double-shaft motor is respectively and fixedly connected with a turntable and a stirring paddle, the upper surface of a rotating shaft is fixedly connected with a cam block, during separation, the double-shaft motor can be turned on and simultaneously drives the output shafts at the upper end and the lower end to rotate, and the cam block is fixedly connected with the rotating shaft. In the rotating process, the rotating disc and the stirring paddle are driven to rotate at the same time, the stirring paddle drives the dispersing agent to be mixed with spilled oil in the sea in the rotating process, the dispersing agent is promoted to make better contact with the spilled oil, emulsification and dispersion of the spilled oil are accelerated, micro-particles are formed, and finally the micro-particles enter the sea to be biodegraded and purified by a water body. The rotation of the turntable drives the cam block to abut against and separate from the connecting rod, so that the cover plate moves up and down, the feeding channel is opened and closed, and the dispersing agent is fed in real time.

The present application relates to the field of oil and gas well cementing engineering, and particularly relates to an oil-based drilling debris cementing slurry system, a preparation method and application thereof. The oil-based drilling debris cementing slurry system includes, in terms of weight parts, cement 100 parts, oil-containing drilling debris 25-45 parts, anti-pollution agent 0.5-5 parts, density adjusting agent 0-40 parts, expansion agent 0-5 parts, early strength agent 0-5 parts, dispersing agent 0-3 parts, suspending agent 0-3 parts, fluid loss reducer 1-10 parts, and water 50-70 parts. The oil-containing drilling debris is selected from oil-extracted drilling debris with a particle size of 0.3-20 microns, and more than 90% of the particles have a particle size of less than or equal to 9.44 microns. The oil-based drilling debris cementing slurry system provided by the present application can adjust the density of the oil-based drilling debris cementing slurry system, prolong the thickening time and increase the compressive strength, thereby ensuring the long-term integrity of the cement sheath. Meanwhile, the problem of oil-containing drilling debris waste treatment is solved, and the waste oil-containing drilling debris is reused.

The treated articles include fibers, sizing agents, and retention aids. The sizing agents include waxes or components thereof having an acid number of 10 mg to 220 mg KOH / g as measured in accordance with USP 401. The retention aids include nitrogen-containing polymers independently selected from the group consisting of (i) a nitrogen-containing polymer of Formula I, (ii) polyethyleneimine, (iii) a polyaminoamide, (iv) a copolymer formed from the reaction product of epichlorohydrin and dimethylamine, and (v) combinations thereof.