79results about How to "Rapid demulsification" patented technology

The invention relates to an oil-water-separation micro-fluidic chip and a preparation method thereof. A micro-structure and a micro-channel are arranged on the surface of the micro-fluidic chip, and the left side and the right side of the micro-channel respectively carry out hydrophilic and oleophylic modification. Under the action of an electric field, an oil-water mixed solution is demulsified, water moves to the hydrophilic side, oil moves to the oleophylic side, and finally oil water-separation is realized. The oil-water-separation micro-fluidic chip is mainly applied to the related fields of transformer oil, turbine oil of power plants, mrine oil spill processing, failed oil of oil fields, oil spill of offshore drilling platforms, advective oil of steel mills, a lot of oily wastewater of oil refineries and the like. The micro-fluidic chip realizes the rapid demulsification and rapid separation of the oil-water mixed solution, has the characteristics of convenience, economy, rapidness and high efficiency, and provides a new analysis technique for the field of oil-water separation.

The invention discloses a water-based non-curable rubber asphalt coating and a preparation method thereof and belongs to the field of coatings. Modified rubber asphalt and mixed tackifying resin are emulsified, and a self-adhesive additive, an interface additive, an anti-freezing agent and an anti-ageing agent are compounded. The problem that the non-curable rubber asphalt waterproof coating cannot be applied until the coating is heated is solved, a process is simplified, and the application range of a product is widened. The initial adhesivity and persistent adhesivity of the coating are improved by using a tackifying resin emulsion. The problem that the non-curable rubber asphalt waterproof coating cannot be fully spread on a damp interface due to poor adhesivity is solved by using a silane interface agent, full-spreading seamless construction can be achieved, the hidden danger of water leakage or seepage is completely eradicated, and the permeation resisting performance meets the industrial standard. The water-based non-curable rubber asphalt coating is cured no longer by innovatively using the self-adhesive additive after coating construction is completed, and is good in puncture resistance and self-curing performance. Quick demulsification of the water-based non-curable rubber asphalt coating is achieved by adopting a double-component spraying technology.

The invention discloses modified emulsified asphalt for bonding layers, which comprises 65.0-68.0 wt% of asphalt, 3.0-4.0 wt% of modifier, 0.25-0.45 wt% of cation fast crack-typed emulsifier and 27.55-31.75 wt% of water. The solid content of the modified emulsified asphalt for bonding layers is more than 67%, a thicker asphalt film is produced after emulsion breaking, and excellent bonding performance and waterproof performance are provided, and the dynamic viscosity of evaporated residue at 60 DEG C is more than or equal to 1800Pa.s.

The invention relates to a photoelectrocatalysis/Fenton coupling processing system of high-salt polymer-containing wastewater. The system comprises an electrolyzing device and a photoelectrocatalysis/Fenton reaction device, wherein the electrolyzing device is used for carrying out quick demulsification and separation on the high-salt polymer-containing wastewater under the effect of an electric field to obtain a subnatant; introducing a photoelectric Fenton reaction into a photoelectrocatalysis system by the photoelectrocatalysis/Fenton reaction device, and carrying out further improvement on a photoelectric catalyst, so that the TiO2 photoelectrocatalysis reaction is combined with the photoelectric Fenton reaction, the catalytic efficiency of a photoelectric integrated device is improved, the system is combined with an electrolytic demulsification technology of the electrolytic device, and deep processing on the high-salt polymer-containing wastewater is realized. The invention also provides a deep processing method of the high-salt polymer-containing wastewater, quick demulsification is firstly carried out on the wastewater through electrolytic preprocessing to remove a majority of oils, and then remaining pollutants are removed through a photoelectrocatalysis/Fenton coupling processing device, so that up-to-standard release of the polymer-containing wastewater is realized.

The invention discloses a preparation method for a magnetic carbon nanotube demulsifier. The preparation method comprises the following steps: (1) subjecting carbon nanotubes and mixed acid to a refluxing reaction, so as to obtain oxidation modified carbon nanotubes; (2) preparing a Fe3O4 precursor solution; and (3) uniformly mixing the oxidation modified carbon nanotubes with the Fe3O4 precursorsolution, and carrying out a reaction at a temperature of 180 DEG C to 220 DEG C, thereby preparing the magnetic carbon nanotube demulsifier. According to the preparation method provided by the invention, firstly, the carbon nanotubes are subjected to oxidation modification through the mixed acid to introduce a large number of carboxyl groups and hydroxyl groups to defects and edges of the carbonnanotubes, and then, Fe3O4 nanoparticles are prepared in situ by utilizing a hydrothermal method to modify the oxidation modified carbon nanotubes; the preparation method is simple and is easy to implement; and the prepared magnetic carbon nanotube demulsifier can be used for rapidly achieving oil-water separation of oily wastewater and is relatively good in demulsification effect. A technical scheme of the invention further provides an application of the magnetic carbon nanotube demulsifier in the oily wastewater.

The invention relates to a storable emulsified asphalt cold-patch mixture and a preparation method and application thereof. The storable emulsified asphalt cold-patch mixture consists of the following components in percentage by weight: 7 to 8 percent of emulsified asphalt, 5 to 6 percent of water, 1 to 2 percent of reinforcing agent, 1 to 3 percent of thixotropic agent and the balance of stone, wherein the emulsified asphalt consists of the following components in percentage by weight: 1.0 to 1.5 percent of emulsifying agent, 1 to 3 percent of thickening agent, 26.5 to 36.5 percent of water and the balance of No.70 asphalt. The storable emulsified asphalt cold-patch mixture has the advantages of convenience of manufacture, long storage time, no environmental pollution, convenience of construction, capacity of opening the traffic after construction and the like, and is suitable for repairing pot holes of asphalt pavements.

The invention discloses a cationic polymer as well as a preparation method and application thereof. The cationic polymer is prepared by the following five process steps in sequence: metering and mixing, hydroxymethylation reaction, polycondensation, inhibition reaction and free formaldehyde elimination. The cationic polymer has the advantages of high cationic degree, high molecular weight, long storage life and low formaldehyde content, and can serve as a flocculating agent, a reverse-phase demulsifier, a water reducing agent for concrete or a treating agent of textile fibers.

The invention relates to a delay coking coke cooling water demulsifier composition and a preparation method and application thereof. The demulsifier composition comprises the following components in percentage by mass: 1 to 25 percent of demulsifier, 1 to 20 percent of dispersing agent, 1 to 25 percent of penetrating agent, 1 to 20 percent of corrosion inhibitor and the balance of solvent. The invention also provides the preparation method for the demulsifier composition and the application of the demulsifier composition to a delay coking device. The demulsifier composition mainly contains the demulsifier, the dispersing agent, the penetrating agent, the corrosion inhibitor and the solvent. By the demulsifier composition, the coke cooling water can be demulsified quickly, and the oil content of water can be reduced obviously; a water body is clear after demulsification; the corrosion of the water body to equipment can be reduced; and meanwhile, the demulsifier composition does not contain any inorganic ion, so that the influence on the conventional water body system is avoided.

The present invention discloses a coking demulsifier, which comprises, by weight, 25-40% of a cationic surfactant, 5-10% of a dispersant, 5-10% of a wetting agent, 10-20% of a corrosion inhibitor, and the balance of water. The present invention further discloses a preparation method for the coking demulsifier. According to the present invention, rapid demulsification of the delayed coking apparatus oil-water separation tank can be achieved, and the oil content in the discharged water can be significantly reduced; the water is clear after demulsification; corrosion of the water body on equipment is reduced; and the coking demulsifier does not contain inorganic ions, and does not affect the existing water system.

The invention provides a salt-responsive modified polyacrylamide oil displacing agent and a preparation method thereof. The raw materials of the salt-responsive modified polyacrylamide displacing agent include acrylamide, sodium acrylate, acrylic polyether polyol, acrylic polyethylene oxide-propylene oxide-ethylene sodium sulfate, an assistant, an initiator and water. The invention also provides the preparation method of the oil displacing agent. The oil displacing agent can effectively reduce the viscosity of crude oil for oil extraction, and has a good ion response intensity.

The invention relates to a preparation method and application of a hyperbranched polymer with propylene diamine as the initiator. The preparation method includes the following steps that firstly, thepropylene diamine is dissolved in organic solvent, then, methyl acrylate is dropwise added, and an intermediate product is obtained through the Michael addition reaction lasting for 40-60 h at the room temperature; secondly, the temperature of the intermediate product obtained in the first step rises to 50-150 DEG C, the reduced pressure condensation reaction is conducted, and a rough product is obtained; and thirdly, the rough product obtained in the second step is subjected to diethyl ether separation and rotary evaporation, and the hyperbranched polymer with the propylene diamine as the initiator is obtained. The end group of the hyperbranched polymer is an amino group, a large number of amide groups and other structures are contained in the framework, a demulsifying agent can rapidly arrive at the oil-water interface due to the strong hydrophily of the amino group, the amide groups can be adsorbed to the oil-water interface in a multipoint manner, the effect of damaging an oil-water interface film is achieved, and the aim of rapid and efficient demulsifying is achieved.

The invention relates to the technical field of road asphalt materials, in particular to a preparation method of high-strength composite modified emulsified asphalt. The asphalt has the advantages that the stability is better, the bonding strength is high, and the problems of wheel sticking, infirm inter-layer bonding, long maintenance time, insufficient shearing property and durability and the like in the construction process are reduced. The process is simple, the production cost can be effectively reduced, the viscosity and bonding performance of the emulsified asphalt are enhanced, and thedemulsification speed of the emulsified asphalt is increased; the composite modified emulsified asphalt is composed of high-strength composite modified asphalt and an emulsifier aqueous solution, theoil-water mass ratio of a mixture of the high-strength composite modified asphalt and the emulsifier aqueous solution is 60: 40-65: 35, that is, the content of evaporation residues of the high-strength composite modified emulsified asphalt is 60%-65%, and the preparation method comprises the following steps: S1, carrying out asphalt heating treatment; S2, preparing high-strength SBS modified asphalt; S3, preparing high-strength composite modified asphalt; S4, preparing an emulsifier aqueous solution; and S5, preparing the high-strength composite modified emulsified asphalt.

The invention provides a compound demulsifier and an application thereof. The demulsifier is prepared from a demulsifier X-75 and a demulsifier L-4 according to the mass ratio of (1-3):(1-3). The demulsifier X-75 is a quinary copolymerized polyether demulsifier, and mainly solves the problem of dehydration amount; and the demulsifier L-4 is a phenol-amine-aldehyde resin block polyether modified demulsifier, and mainly solves the problems of dehydration and wall hanging. The compound demulsifier provided by the invention is small in dosage, low in dehydration temperature, high in dehydration rate, clear in dehydrated water color, fast in oil-water separation in the demulsification process, and neat in oil-water interface, and can quickly and efficiently solve the problem that normal dehydration of crude oil is interfered by a certain amount of single/mixed oil well shaft maintenance agent and a certain amount of single/mixed flowback raffinate in well operation at low temperature; and secondary pollution to crude oil is avoided, and new impurities are not introduced. Similar problems in most oil field production can be solved or partially solved.

The invention provides a pH-responsive modified polyacrylamide oil displacement agent and a preparation method thereof. The oil displacement agent is composed of 10-85wt% of acrylamide, 10-40wt% of sodium acrylate, 5-35wt% of poly N, N-diethylamido ethyl methacrylate, 5-15wt% of acrylic polyethylene oxide-propylene oxide, auxiliary, initiator and water. The invention further provides a preparationmethod of the oil displacement agent. The oil displacement agent can effectively lower viscosity of crude oil during crude oil extraction, is highly responsive to acidity and alkalinity and can effectively increase crude oil recovery ratio.

The invention discloses a cationic surfactant which is prepared through the three sequential process steps of metering and mixing, hydroxymethyl reaction and polycondensation reaction. The preparation method specifically comprises the following steps: 400-900 parts by weight of water is added into a reaction kettle, and is heated to a temperature of 55-65 DEG C; the pH value is regulated to 8.5-9.5 with an alkaline substance; 40-120 parts by weight of an alkylamidopolyamine cationic surfactant is added; 70-240 parts by weight of formaldehyde is added; the temperature is increased to 60-85 DEG C, and a reaction is carried out for 40-60min; the pH value is regulated to 2-4 with an acidic substance; the temperature is increased to 85-95 DEG C and a reaction is carried out for 2-4h; and the temperature is maintained and a reaction is carried out for 0.5-1h, such that the cationic surfactant is obtained. The cationic surfactant provided by the invention has the advantages of high cationic degree, large molecular weight, and long storage life. The cationic surfactant has suspension and diffusion property in water, and is miscible with water with any ratio.

The invention discloses permeable emulsified asphalt concrete and a preparation method thereof. The permeable emulsified asphalt concrete is prepared from the following components in parts by mass: 50-70 parts of coarse aggregate, 20-25 parts of cement, 5-10 parts of modified emulsified asphalt, 0-5 parts of a cementing agent and 5-10 parts of water, wherein the modified emulsified asphalt is prepared from the following components in parts by mass: 40-60 parts of asphalt, 20-30 parts of anionic emulsion, 20-25 parts of rubber powder and 0-5 parts of an anti-stripping agent. The prepared modified emulsified asphalt is suitable for low-temperature storage, and the prepared permeable emulsified asphalt concrete has the advantages of high concrete strength, high-temperature rutting resistance and wear resistance.

The invention relates to a centrifugal extraction separation method and a separation device in a preparation process of nitro-azide compounds in a formula of explosives and powders. The method comprises the following steps: collecting a reaction solution of a desalting unit after an azidation reaction of a nitro-azide compound to obtain a mixed solution containing the nitro-azide compound, dichloromethane, a reaction solvent and a small amount of sodium salt; performing four-stage centrifugal extraction on the mixed solution, injecting fresh water into a light-phase inlet of a third-stage centrifugal extraction machine through a peristaltic pump, and returning separated wastewater flowing out of light-phase outlets of the third-stage centrifugal extraction machine and the second-stage centrifugal extraction machine to a previous-stage centrifugal extraction system to form a countercurrent series circulating washing process; and carrying out fourth-stage centrifugal extraction, adding alkali liquor, and carrying out alkali washing separation, so as to obtain a product mixed solution of the nitryl azide and dichloromethane. The invention further provides a centrifugal extraction separation device, and internal components of a centrifugal extraction machine are optimized and improved.

The invention provides a surfactant composition for oil extraction in an oil field and a preparation method thereof. A pH responsive surfactant of which the charge can be reversibly converted under a preset pH value and of which the type can be converted among three anionic-amphoteric-cationic surfactants is compounded with a surfactant auxiliary agent formed by mixing conventional mesoporous silica nanoparticles and hydrophobic mesoporous silica nanoparticles; and the surfactant composition for oil extraction in the oil field is obtained, wherein the surfactant composition has high stability, can realize rapid demulsification, can disperse large oil drops into small oil drops, and can intelligently regulate and control the stability, particle size and flowability of the oil drops. By utilizing the mutual synergistic effect of the pH response type surfactant and the auxiliary agent mesoporous silica nanoparticles, the conversion among different surfactant types in the same oil displacement system can be realized, the surfactant composition can be widely applied to different oil extraction environments, and the crude oil recovery ratio is comprehensively improved by utilizing the conversion among different types of surfactants.

The invention discloses a composite carbon dioxide fracturing fluid and a preparation method thereof, belonging to the technical field of carbon dioxide fracturing. The composite carbon dioxide fracturing fluid comprises the following components in parts by weight: 10-20 parts of gaseous carbon dioxide, 0.1-2 parts of a thickening agent, 0.2-4 parts of ethanol and 80-100 parts of liquid carbon dioxide, wherein the thickening agent is obtained through polymerization of a first monomer and a second monomer, the first monomer is obtained through a reaction of N,N-diethyl-2-chloroacetamide, 4-hydroxybutyl vinyl ether and 1,4-butyl sultone, and the second monomer is obtained through a reaction of 9-decenal and benzylamine. The fracturing fluid is simple in formula, convenient to construct on site and small in damage to strata; and the thickening agent is formed by polymerizing the first monomer and the second monomer, is good in solubility in carbon dioxide, has excellent sand-carrying capacity and can remarkably improve the temperature resistance and shear resistance of the fracturing fluid.