36 results about "Polyethylene polyamine" patented technology

The application discloses a reverse demulsifier composition and relates to the technical field of oil and gas field development. The reverse demulsifier composition comprises 1-4 parts of castor oil and 3-8 parts of cationic polyether in terms of weight parts. The cationic polyether is prepared from a mass ratio of 1:20-80:10-40 of a starter, ethylene oxide and propylene oxide. The starter is prepared by addition reaction of a first monomer and a second monomer. The first monomer is one of polyethylene polyamine or aliphatic diamine. The second monomer is quaternary ammonium salt containing one olefinic bond or epoxy quaternary ammonium salt. The molar ratio of the first monomer to the second monomer is 1:0.2m-0.7m, and m is the number of active hydrogen in the first monomer. The reverse demulsifier composition has good demulsification effect and fast demulsification speed.

The invention provides a compound for an oil-based drilling fluid viscosity reducer and the oil-based drilling fluid viscosity reducer. The preparation method of the compound for the oil-based drilling fluid viscosity reducer comprises the following steps: mixing polyethylene polyamine, alcohol amine and humic acid for reaction to obtain a first reaction intermediate; and reacting the first reaction intermediate with a fluorine-containing silane coupling agent to obtain the compound for the oil-based drilling fluid viscosity reducer, wherein the ratio of the amount of substance of the humic acid to the polyethylene polyamine to the alcohol amine to the fluorine-containing silane coupling agent is 1 to (0.5 to 0.75) to (0.01 to 0.5) to (0.5 to 5). The viscosity reducer for the oil-based drilling fluid comprises the compound for the viscosity reducer for the oil-based drilling fluid, a fluorine-containing surfactant and an oil-phase solvent in a mass ratio of 100: (10-50): (20-80). The oil-based drilling fluid viscosity reducer provided by the invention has excellent high temperature resistance.

The invention belongs to the technical field of drilling fluid chemistry in the petroleum industry, and particularly relates to a high-temperature-resistant viscosity reducer as well as a preparation method and application thereof. The preparation method of the high-temperature-resistant viscosity reducer provided by the invention comprises the following steps: (1) adding vegetable oleic acid and polyethylene polyamine into a reactor, and reacting at a first temperature under the protection of inert gas to obtain a first intermediate; (2) reducing the temperature of the first intermediate to a second temperature, slowly adding anhydride, then heating to a third temperature, and continuously reacting to obtain a second intermediate; and (3) reducing the temperature of the second intermediate to room temperature, adding trimethylchlorosilane, reacting at a fourth temperature, and adding white oil for dilution after the reaction is finished, thereby obtaining the high-temperature-resistant viscosity reducer. The high-temperature-resistant viscosity reducer disclosed by the invention has an excellent temperature-resistant effect, and the viscosity reduction effect of the high-temperature-resistant viscosity reducer on an oil-based drilling fluid can still reach 20% or above after the high-temperature-resistant viscosity reducer is aged at 180 DEG C for 16 hours.

The invention relates to a chemical absorption liquid for removing methyl iodide and a preparation method thereof, and belongs to the technical field of underwriting. The chemical absorption liquid comprises the following raw materials in percentage by mass: 0.2-5% of sodium thiosulfate, 1-10% of long-chain alkyl trimethyl ammonium halide, 0-1% of sodium hydroxide, 0-10% of polyethylene polyamine and the balance of water. The number of long-chain carbon atoms in the long-chain alkyl trimethyl ammonium halide is greater than 8; the chemical absorption liquid is prepared by completely dissolving and uniformly mixing the components. According to the chemical absorption liquid, the long-chain alkyl trimethyl ammonium halide salt is introduced as a surfactant for the first time, has a solubilizing effect, and can greatly reduce the gas-liquid mass transfer resistance of methyl iodide, so that efficient absorption of radioactive and non-radioactive methyl iodide is realized; the chemical absorption liquid is not only suitable for normal temperature, but also suitable for high-temperature and high-humidity environments, and harmful gas can be purified in a solution washing or solution spraying mode.

The invention discloses a clay stabilizer for a polymer dry powder direct distribution variable-viscosity fracturing fluid. The clay stabilizer is prepared from quaternary ammonium salt, an alcohol amine compound and a polyamine compound as raw materials in a solvent. The quaternary ammonium salt is quaternary ammonium salt with the carbon chain length of C12-C18; the alcohol amine compound is selected from at least one of ethanolamine, dimethyl propanolamine, hydroxyethyl piperazine, piperidine, isopropanolamine, triisopropanolamine, aminomethyl propanolate, hydroxyethyl ammonium salt and the like; the polyamine compound is selected from any one of poly dimethyl diallyl ammonium chloride, polyquaternary ammonium salt, poly allylamine, polyurea, polybutanediamine, polyethyleneimine, polyethylene polyamine and a polyethyleneimine cross-linked substance. The clay stabilizer disclosed by the invention is particularly suitable for polymer dry powder direct distribution variable-viscosity fracturing fluid, the stability of clay can be remarkably improved, particularly, excellent inhibition performance can still be kept under high-temperature and high-salt conditions, stratum damage is reduced, and the application requirements in complex environments of oil fields are met.

The application discloses a hydrophilic polytetrafluoroethylene membrane and a preparation method thereof. The hydrophilic polytetrafluoroethylene membrane comprises a PTFE base film and a hydrophilic layer attached to the PTFE base film; raw materials of the PTFE base film comprise polytetrafluoroethylene dispersion resin, maleic anhydride copolymer and extrusion aid in a mass percentage ratio of 1:0.05-0.2:0.2-0.4, the maleic anhydride copolymer is a copolymer of olefin or aromatic hydrocarbon and maleic anhydride; raw materials of the hydrophilic layer comprise polyethylene polyamine solution and polyethylene imine solution, and a water wetting angle of the hydrophilic polytetrafluoroethylene membrane is less than 50 degrees. In the filtration process of etching waste liquid and stripping liquid, the hydrophilic polytetrafluoroethylene membrane disclosed by the application is not prone to accumulate dirt, can maintain relatively stable transmembrane pressure and keep stable filtration effect.

This invention relates to the field of polymer materials technology, specifically to a permanent antistatic ABS composite material based on polyethylene polyamine-aminated carbon nanotubes, its preparation method, and its application. The method includes: Step 1, basicizing carbon nanotubes; Step 2, mixing carboxylated carbon nanotubes, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine, adding N,N-dimethylformamide solvent, and then adding polyethylene polyamine to obtain polyethylene polyamine-aminated carbon nanotubes; Step 3, grafting the polyethylene polyamine-aminated carbon nanotubes with a styrene-maleic anhydride copolymer to obtain styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes; Step 4, melting the styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes with ABS to obtain a permanently antistatic ABS composite material. This preparation method uses polyethylene polyamine to aminate carbon nanotubes, improving the antistatic effect and mechanical properties of the ABS composite material.

The invention relates to the technical field of metal working fluids, in particular to a magnesium alloy cutting fluid and a preparation method thereof. The magnesium alloy cutting fluid is prepared from the following components in parts by mass: 6 to 10 parts of alcohol amine, 3 to 6 parts of organic phosphonic acid, 2 to 4 parts of ether carboxylic acid, 1 to 3 parts of waterborne polyether, 2 to 4 parts of phosphate, 1 to 3 parts of special amine, 0.5 to 2 parts of siloxane ketone, 0.5 to 2 parts of waterborne silicone oil, 0.5 to 2 parts of chelating agent, 1 to 3 parts of polyethylene polyamine, 0.1 to 0.5 part of waterborne graphene extreme pressure agent, 0 to 1.2 parts of auxiliary agent and 65 to 85 parts of water. By compounding various lubricants and extreme pressure agents such as alcohol amine, ether carboxylic acid, water-based polyether, phosphate, siloxane ketone, water-based silicone oil and a water-based graphene extreme pressure agent, an effective lubricating film is formed in the cutting process, friction is reduced, cutting force is reduced, formation of built-up edges is inhibited, and the service life of a cutter is prolonged.

The invention relates to the field of lubricating oil, in particular to a phenolic ester antioxidant, a lubricating oil composition and preparation and application of the phenolic ester antioxidant and the lubricating oil composition. The preparation method of the phenolic ester antioxidant comprises the following steps: mixing alkylphenol and formaldehyde at 50-55 DEG C under the protection of nitrogen to synthesize a first intermediate; mixing the first intermediate and polyethylene polyamine at 50-55 DEG C under the protection of nitrogen to synthesize a second intermediate; mixing alkylphenol and triethyl phosphite, and synthesizing a third intermediate by taking anhydrous potassium carbonate as a catalyst; and mixing the second intermediate and the third intermediate, and synthesizing the phenolic ester antioxidant by taking anhydrous potassium carbonate as a catalyst. The phenolic ester antioxidant provided by the invention has excellent oxidation resistance and detergency and dispersibility, and can reduce the paint film formation tendency when the lubricating oil is used.

The invention relates to a phenolic resin polyethylene polyamine demulsifier as well as a preparation method and application thereof, and belongs to the technical field of oil and gas exploitation. The demulsifying agent comprises a modified four-block phenolic resin demulsifying agent and a seven-block polyether phosphate demulsifying agent, the modified four-block phenolic resin demulsifying agent can quickly achieve a demulsifying effect on shale oil, and the seven-block polyether phosphate demulsifying agent is long in demulsifying time and sufficient in later strength. The modified tetrablock phenolic resin demulsifier and the heptablock polyether phosphate demulsifier are compounded, so that the demulsification effect can be effectively improved, and the demulsification time can be effectively prolonged. For shale oil, the demulsifying and dehydrating agent can play a good demulsifying and dehydrating role, and the water content in the dehydrated oil is less than 3.0%.

The application belongs to the technical field of catalyst carrier preparation, and particularly relates to a modified catalyst carrier material and a preparation method thereof. The preparation process comprises the following steps: (1) preparing an aluminum salt mixed solution containing hydroxypropyl-beta-cyclodextrin; (2) preparing a partial aluminate mixed solution containing a polyethylene polyamine small molecule compound; (3) adding the partial aluminate mixed solution into the aluminum salt mixed solution to obtain a precursor; and (4) obtaining the modified catalyst carrier material after reaction, post-treatment and calcination. A certain amount of polyethylene polyamine small molecule compound is added as a template assistant in the hydroxypropyl-beta-cyclodextrin template system. The unique properties of the hydroxypropyl-beta-cyclodextrin and the polyethylene polyamine small molecule compound are utilized to guide the aluminum salt and the partial aluminate to form a precursor with a porous channel structure, and finally an alumina carrier with a high specific surface area and a large pore size is obtained through calcination.

The invention relates to the technical field of oil field demulsifiers, and particularly discloses a demulsifier for high-viscosity and high-wax-content shale oil and a preparation method of the demulsifier, and the demulsifier for the high-viscosity and high-wax-content shale oil comprises a modified tetrablock phenolic resin demulsifier and a modified phosphate demulsifier in a mass ratio of (3-5): 1; wherein the modified tetra-block phenolic resin demulsifier is a modified tetra-block phenolic resin demulsifier generated by carrying out polymerization reaction on a phenolic resin polyethylene polyamine polymer, ethylene oxide and epoxypropane; the modified phosphate ester type demulsifying agent is a seven-block polyether phosphate ester type demulsifying agent. According to the invention, a slightly oil-soluble demulsifier taking a phenolic resin tetraethylenepentamine polymer as an initiator is compounded with a modified phosphate type slightly oil-soluble demulsifier, and the slightly oil-soluble modified phosphate type demulsifier and the slightly oil-soluble demulsifier taking the phenolic resin tetraethylenepentamine polymer as the initiator are compounded in a multi-series and multi-proportion manner; the invention relates to a dehydration agent specially aiming at shale oil produced liquid treatment.

The invention discloses bisphenol F type resin as well as a preparation method and application thereof, and relates to the field of electron microscope detection and analysis. The invention relates to an application of bisphenol F resin in electron microscope detection and analysis, in particular to an application of bisphenol F resin as an embedding medium in preparation of an electron microscope sample through polymerization at room temperature. And curing the embedding medium to obtain the electron microscope sample embedding block. The bisphenol F type resin comprises the following components: a bisphenol F type epoxy resin monomer, C12-14 alkyl glycidyl ether and polyethylene polyamine, and the mass ratio of the C12-14 alkyl glycidyl ether to the polyethylene polyamine to the bisphenol F type epoxy resin monomer is (10-40): (10-25): 100. The EPIKOTE 826 bisphenol F resin is low in price, does not absorb moisture, is suitable for biological tissue specimens, is low in viscosity, convenient to operate, small in shrinkage rate after curing, small in volume change before and after room-temperature polymerization, clear in ultrastructure observed by an electron microscope, complete in membrane structure and good in contrast under the electron microscope, a slice can tolerate electron beam bombardment, and an image does not drift; and the section can be observed without being stained.

The application discloses a polyethylene polyamine wastewater treatment and recovery device, and relates to the technical field of wastewater treatment.The polyethylene polyamine wastewater treatment and recovery device comprises a sedimentation tank, a treatment tank, a turnover mechanism and a deslagging mechanism.The turnover mechanism comprises a servo motor and a supporting module.The supporting module is installed at the middle of the bottom of the inner cavity of the treatment tank.A rotating shaft is rotatably installed at the middle of the top of the inner cavity of the treatment tank.The bottom end of the rotating shaft is fixedly installed with a cylinder.A turnover plate is fixedly installed at the middle of the outer cylindrical surface of the cylinder.An agitating assembly is installed at the rectangular opening of the outer cylindrical surface of the cylinder.The deslagging mechanism comprises a deslagging tank.The liquid inlet of the deslagging tank is connected with a liquid inlet square pipe.The liquid outlet of the deslagging tank is connected with a liquid outlet square pipe.The liquid inlet of the liquid inlet square pipe and the liquid outlet of the liquid outlet square pipe are both installed with a material guide hopper.A filtering assembly is installed at the middle of the deslagging tank.The polyethylene polyamine wastewater treatment and recovery device can realize the effect of graded treatment, can treat wastewater in stages, and can fully mix wastewater and treatment agents, so that the wastewater treatment effect is good.

This invention belongs to the field of lubricating oil additives, specifically relating to a soot-dispersible polyisobutylene succinimide dispersant, its preparation method, and its application. The preparation method includes the following steps: (1) mixing polyisobutylene maleic anhydride, base oil, and aromatic solvent, stirring evenly, heating, adding polyethylene polyamine, introducing nitrogen gas, heating to the aromatic reflux temperature, and performing an amidation reaction to obtain product 1; (2) adding aminophenylboronic acid to product 1, continuing reflux, borizing reaction, removing the solvent by vacuum distillation, filtering, and obtaining the soot-dispersible polyisobutylene succinimide dispersant. The dispersant in this invention has the characteristic of good soot dispersion performance. The prepared product can improve the soot dispersion of oil products with a lower dosage. Moreover, the use of aminophenylboronic acid for borization reaction can improve high-temperature detergency. The preparation process of this invention is simple and easy to implement.

This invention relates to a sulfur dissolving agent, its preparation method, and its application, belonging to the field of oil and gas field chemicals technology. The sulfur dissolving agent of this invention is a high-efficiency sulfur dissolving agent for oil-water mixed phases with low density, long wellbore residence time, and rapid sulfur dissolution. The main function of the sulfur dissolving agent is to dissolve deposited sulfur; the foaming agent contains strongly polar functional groups such as hydroxyl and amino groups, which can be tightly oriented around the hydrophilic groups of the active agent molecules in the microbubble core, and, in conjunction with the foam stabilizer, can provide a densely structured coating for the microbubble core, thus protecting it; the foaming agent and foam stabilizer impart a low density to the sulfur dissolving agent. Due to its low density, the sulfur dissolving agent of this invention can reduce the amount of the main sulfur dissolving agent used, thereby reducing raw material costs. Using polyethylene polyamine and / or the compound shown in Formula I as the main sulfur dissolving agent can give the sulfur dissolving agent a lower odor and also protect the gas core and enhance the temperature resistance of the microbubbles.

The invention discloses an acid printed and dyed silk fabric resistant to machine washing and high in washing liquor staining fastness and a preparation process thereof, the acid printed and dyed silk fabric is soaked or padded with a color fixing agent and then treated by a cross-linking agent, and a polymer space net-shaped protective layer is formed on the surface of the fabric; the color fixing agent is a polyethylene polyamine compound or cationic quaternary ammonium salt; the cross-linking agent is an aziridine cross-linking agent or triglycidyl isocyanurate. According to the invention, a fixation composite cross-linking treatment technology is proposed for the first time, a macromolecular space net-shaped protective layer is formed under a low-temperature condition, and the washing liquor staining fastness (rating is more than 3 grade) and the machine washing resistance (the fabric after 10 times of machine washing is small in color change, free of obvious ash damage and color fading, and very good in color fastness to washing) of the acid dyed or printed silk fabric are remarkably improved. The fixation treatment process is simple and reliable, the staining fastness of washing liquor of the acidic silk fabric can be effectively improved at the low temperature of 30-40 DEG C, and the influence on the hand feeling and color of the fabric is very small.

This invention belongs to the field of catalyst support preparation technology, specifically relating to a high-efficiency catalyst support material and its preparation method. This invention adds a certain amount of polyethylene polyamine small molecule compound as a template agent to a hydroxypropyl-β-cyclodextrin template system. Using hydroxypropyl-β-cyclodextrin and the polyethylene polyamine small molecule compound as template agents, aluminum salt and aluminate are guided to form a precursor with a porous structure, which is finally obtained by calcination to obtain an alumina support. Adding a portion of hydroxypropyl-β-cyclodextrin to the aluminate solution in advance acts as a buffer, reducing the influence of the polyethylene polyamine small molecule compound on the solution system, promoting a more complete and uniform reaction between the aluminum salt and aluminate, reducing the direct interaction of interparticle hydrogen bonds, thereby effectively preventing hard agglomeration caused by capillary forces and increasing the specific surface area and pore size of alumina.

The invention discloses an energy-saving and environment-friendly clearing agent for diesel oil and gasoline as well as a preparation method and application of the energy-saving and environment-friendly clearing agent, and belongs to the technical field of fuel clearing agents. The detergent comprises naphthenate raw materials and liquid solvent raw materials, the naphthenate raw materials comprise magnesium naphthenate, barium naphthenate, zinc naphthenate, manganese naphthenate and calcium naphthenate, and the liquid solvent raw materials comprise isooctyl nitrate, isobutanol, n-butanol, 2, 6-diethylaniline and polyethylene polyamine. The preparation method comprises the steps of raw material reinspection, normal-temperature mixing, dissolving and stirring for 3-3.5 hours, reaction termination, finished product inspection and packaging. The additive is suitable for various fuels such as gasoline, diesel oil and heavy diesel oil, the addition proportion of the diesel oil is 0.3%-0.4%, the addition proportion of the gasoline is 0.2%-0.3%, and the initial addition amount of old vehicles is 50% of the specified amount. The detergent has a remarkable oil saving effect, the diesel oil saving rate is 18-26%, the gasoline saving rate is 20-25%, the vehicle power can be improved, engine carbon deposition and abrasion are reduced, tail gas emission is reduced, the detergent is adaptive to new and old vehicles, and the energy-saving and environment-friendly requirements are met.

The application discloses a kind of nano-modified starch glue for corrugated box and its preparation method.The starch glue includes carrier glue and main body glue with mass ratio of 1:4~5, the carrier glue includes starch 10 parts, water 50~60 parts, sodium hydroxide 0.8~1.2 parts, modified PAE resin 0.8~1.5 parts;Main body glue includes starch 10 parts, water 30~40 parts, oxidant 0.1~0.3 parts;The preparation method of the modified PAE resin is: with molar ratio of 1.2~1.4:1:0.2~0.3 binary acid, polyethylene polyamine and amino acrylate monomer as raw material, alkenyl-containing polyamide polyamine is prepared by polycondensation;Alkenyl-containing polyamide polyamine and hydrogen-containing silane, epoxy chloropropane are sequentially reacted to obtain modified PAE resin.The scheme of the application effectively solves the current corrugated paper starch glue strong hygroscopicity, the defect of easy hydrolysis and opening glue.

This invention provides a temperature-sensitive high-temperature resistant suspension stabilizer for oil-based drilling and completion fluids and its preparation method. The preparation method includes the following steps: a) mixing dimer acid monomers and acid anhydride monomers, stirring at 80-90°C until fully mixed, and then purging with nitrogen to remove oxygen, obtaining a first mixture; b) adding a dimer fatty amine monomer to the first mixture obtained in step a, stirring evenly, obtaining a second mixture; c) slowly adding polyethylene polyamine to the second mixture obtained in step b, then heating to 130-180°C, stirring and reacting, removing water from the product solution after the reaction, obtaining the product; d) cooling the product obtained in step c to room temperature, thus obtaining the temperature-sensitive high-temperature resistant suspension stabilizer. The beneficial effects of this invention are: the prepared temperature-sensitive high-temperature resistant suspension stabilizer for oil-based drilling and completion fluids has excellent high-temperature resistance and can effectively enhance the suspension stability of oil-based drilling and completion fluids under high-temperature conditions.

This invention belongs to the field of nanomaterials technology, specifically relating to a distillery lees-based carbon quantum dot, its preparation method, and its application. The preparation method of the distillery lees-based carbon quantum dot includes the following steps: (1) preparing distillery lees powder; (2) reacting the distillery lees powder, polyethylene polyamine compound, and hydroxypropyl-β-cyclodextrin to obtain a reaction solution; (3) solid-liquid separation to obtain a carbon quantum dot solution; and (4) purification and drying to obtain distillery lees-based carbon quantum dots. This invention uses inexpensive and stable-source baijiu lees as a carbon source, polyethylene polyamine compound as a nitrogen source, and hydroxypropyl-β-cyclodextrin as an auxiliary agent, employing a simple, green, and low-energy-consumption synthesis process to prepare nitrogen-doped carbon quantum dots based on distillery lees. These carbon quantum dots can serve as highly efficient functional fillers, significantly improving the ionic conductivity of solid polymer electrolytes, and simultaneously solving the technical challenges faced in the industrialization of carbon quantum dots and the resource utilization of distillery lees.

The present application relates to the field of biotechnology and molecular diagnosis, and particularly relates to a methylation detection pretreatment kit and method for protecting DNA integrity, which can solve the problem that DNA degradation is serious in traditional bisulfite conversion technology, and conversion efficiency and DNA integrity are difficult to be obtained simultaneously, the kit comprises a conversion solution, a protection solution, a combination solution, a desulfonation solution, a washing solution and an elution solution, the conversion solution contains 2.5-4 mol / L bisulfite and linear polyethylene polyamine, the protection solution contains an organic denaturant and a polyphenol antioxidant, the DNA melting temperature is reduced by the organic denaturant, the linear polyethylene polyamine accelerates the conversion reaction, and the desulfonation system with low water activity is combined to complete the bisulfite conversion under mild conditions of 50-70 DEG C; the present application can realize the conversion efficiency of greater than 99.5% of unmethylated cytosine, greatly reduce DNA degradation, significantly improve the long fragment DNA recovery rate and the detection sensitivity of trace samples, and is suitable for the methylation detection of three generations of long read sequencing and clinical trace samples.

The application discloses a kind of dual-function polyether amine adjuvant for realizing high-efficiency purification and separation of crude coal gas and application thereof.The adjuvant is used lauryl alcohol as starter, sequentially block polymerized with propylene oxide and ethylene oxide, then bridged with epichlorohydrin, and the end epoxy group polyether is generated by base ring closure.Finally, in the micro-channel reactor, amine end-capping reaction is carried out with polyethylene polyamine according to the molar ratio of epoxy group to primary amine group 1:1, forming linear polyether amine compound.The adjuvant has a linear structure of "hydrophobic-hydrophilic-polyamine group", which can realize efficient cleaning and rapid demulsification in weak alkaline ammonia system at the same time, one dose with double effects, significantly improving oil-water separation efficiency and oil recovery rate, and simplifying the process of dosing, reducing operating cost.The preparation process of the application uses micro-channel reactor for continuous synthesis, and the reaction condition is accurately controllable, the product structure is clear, and the molecular weight distribution is narrow, which is suitable for crude coal gas purification and emulsion treatment in coal chemical industry, coking and other industries.

The application provides a nano oil displacement material for enhanced oil recovery, a preparation method thereof and a use method thereof in low-permeability oil reservoirs. The preparation method comprises the following steps: mixing tartaric acid, polyethylene polyamine, alkyl alcohol ether and water to perform a hydrothermal reaction, and performing freeze-drying on the product after the hydrothermal reaction to obtain the nano oil displacement material. The weight ratio of the tartaric acid, the polyethylene polyamine and the alkyl alcohol ether is 1:2-4:3-5. The preparation method is easy to operate, and the raw materials are cheap and easy to obtain. In particular, the obtained nano oil displacement material has a small size, high interfacial activity and good wetting regulation capacity, and can exhibit a significant synergistic effect in combination with CO2 flooding in low-permeability oil reservoirs.

The application belongs to the technical field of adsorbing materials, and particularly relates to an adsorbing material, a preparation method and application thereof, and a method for capturing low-concentration CO2 in air. The adsorbing material provided by the application comprises an adsorbing base and organic amine loaded on the surface of the adsorbing base; the adsorbing base comprises macroporous adsorbing resin, the pore volume of the adsorbing base is 0.3-0.9 mL / g, the specific surface area is 300-800 m 2 / g, and the average pore radius is 15-19 Å; the organic amine comprises polyethylene imine or polyethylene polyamine. The macroporous adsorbing resin with low price is used as a carrier to load the organic amine active component, so that the adsorbing capacity is improved and the cost of the adsorbing material is reduced. The adsorbing material provided by the application can efficiently adsorb low-concentration carbon dioxide in the environment in a humidified environment.

The present application relates to a kind of degradable graphene dispersant and its preparation method and application.The degradable graphene dispersant is composed of conjugated center and hydrophilic group with graphene by π-π interaction;The conjugated center is selected from benzene, naphthalene, anthracene, phenanthrene, pyrene or thiophene plane conjugated structure;The hydrophilic group is selected from hydroxyl, amino, polyethylene polyamine, polyether, sulfonic acid group or carboxyl;Two parts are connected by imine bond C=N structure.The graphene dispersant provided by the present application is stable in neutral and weak acid or alkali environment, and can be decomposed in strong acid or alkali.The dispersant can disperse graphene well, and can be removed from the surface of graphene by simple acid-base treatment after use, reducing the negative effects caused by dispersant molecular residue.Based on this, high-conductive carbon-based film can be further prepared, and has wide application prospect.

The invention relates to a waste drilling fluid performance recovery integrated treatment method, which comprises the following steps: mixing an activator, a modifier and a stabilizer into to-be-treated recoverable waste drilling fluid, uniformly stirring, and recovering the performance of the to-be-treated recoverable waste drilling fluid for reutilization. The activating agent is prepared from the following raw materials: polyethylene polyamine, monobrominated fatty acid, sodium monobrominated alkane sulfonate, deionized water, disodium ethylene diamine tetraacetate and the like. The modifier is prepared from the following raw materials: sodium p-styrenesulfonate, 2-acrylamido-2-methylpropanesulfonic acid, maleimide, 2-(allylsulfonyl)-6-methylpyridine, a chain transfer agent, an initiator, deionized water and the like. The stabilizer is prepared from the following raw materials: polyethylene glycol, maleic anhydride, 2-acrylamido-2-methylpropanesulfonic acid, [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, N-vinyl pyrrolidone, an initiator, a catalyst, deionized water and the like. According to the method, the treatment effect is good, the high-value recoverable waste drilling fluid can be reused, the treatment cost is reduced, and the treatment efficiency is improved.

The invention relates to the technical field of preparation of polyurethane hydrophilic chain extenders, and discloses a sulfonic acid type polyurethane in-bath chain extender and a preparation method thereof. The preparation method comprises the following steps: (1) raw materials comprise cyanuric chloride, polyethylene polyamine, a mixed solvent, a neutralizer and a component X, wherein the component X is sulfamic acid or a combination of sulfamic acid and alcohol amine; (2) carrying out reaction on cyanuric chloride and the component X in a mixed solvent, and controlling the pH value of the system in the reaction process by adopting a neutralizer to prepare hydrophilic cyanuric chloride; (3) carrying out a reaction on hydrophilic hydroxylated cyanuric chloride and polyethylene polyamine to prepare a sulfonic acid type polyurethane in-bath chain extender dispersion liquid; and (4) filtering and drying the chain extender dispersion liquid in the sulfonic acid type polyurethane bath. The sulfonic acid type polyurethane in-bath chain extender can be used for a synchronous chain extension reaction when a polyurethane prepolymer is emulsified in water, strong polar sulfonic groups are introduced into a polyurethane skeleton, and a waterborne polyurethane microemulsion with strong hydrophilicity, high stability and high solid content is prepared.

The invention provides an ultra-high-temperature-resistant viscosity reducer for oil-based drilling fluid as well as a preparation method and application of the ultra-high-temperature-resistant viscosity reducer. The preparation method of the viscosity reducer comprises the following steps: (1) heating and melting octadecanedioic acid, and sequentially adding polyol and a catalyst into the octadecanedioic acid; introducing nitrogen to remove oxygen, and reacting to obtain an intermediate product I; (2) adding polyethylene polyamine into the intermediate product I obtained in the step (1) for reaction to obtain an intermediate product II; (3) adding terephthalic acid into the intermediate product II obtained in the step (2), and reacting; and then cooling, and adding white oil into the obtained reactant to obtain the ultra-high-temperature-resistant viscosity reducer for the oil-based drilling fluid. The viscosity reducer disclosed by the invention adopts a special functional group combination, not only solves the problem of rheological control under a high-density system, but also breaks through the technical bottleneck that a traditional viscosity reducer is easy to lose efficacy in a high-temperature environment, and has important significance for improving the drilling efficiency and reducing the operation cost.