32 results about "Bromide salt" patented technology

The invention belongs to the field of post-treatment of organic chemical synthesis methods, and relates to a post-treatment method for propiconazole synthesis. A crude propiconazole product is used as a raw material and is subjected to an isomerization reaction under the combined action of a bromine-containing ionic liquid and sodium alkoxide to generate cis-propiconazole. The bromine-containing ionic liquid is imidazolium bromine salt: [CnH2n + 1-MIM] + Br <-> (n = 2-4) or pyridinium bromine salt: [CmH2m + 1-Py] + Br <-> (m = 2-4). The method is mild in process condition, low in reaction temperature, short in process path, simple to operate and high in safety, efficient conversion of low-efficiency trans-propiconazole and ineffective isomers is achieved, the content of cis-propiconazole in a treated sample is as high as 99%, the yield is as high as 97%, the economical efficiency of the process is improved, and the method is suitable for industrial production. And the ionic liquid used in the reaction can be further recycled, so that the atom utilization rate is increased.

This invention provides an N,N-diethylpyrrolidine difluorosulfonylimide salt, its preparation method, and its applications, belonging to the field of ionic liquid materials technology. The preparation method of the N,N-diethylpyrrolidine difluorosulfonylimide salt of this invention includes the following steps: reacting potassium carbonate solution, tetrahydropyrrole, and bromoethane in an inert atmosphere; then dissolving the reaction product in an organic solvent, filtering, and evaporating to obtain N,N-diethylpyrrolidine bromide; dissolving the N,N-diethylpyrrolidine bromide in water, adding activated carbon for decolorization treatment, to obtain an aqueous solution of N,N-diethylpyrrolidine bromide; and subjecting the aqueous solution of N,N-diethylpyrrolidine bromide to an ion exchange reaction with lithium difluorosulfonylimide in an organic solvent to obtain the final product. The preparation method of this invention separates the reaction product and byproduct into liquid and solid phases, and the reaction does not introduce other impurity ions, greatly improving the purity of the product.

The invention relates to an imidazole bromide azobenzene ionic liquid catalyst as well as a synthesis method and application thereof. According to the technical scheme, the preparation method comprises the following steps: diazotizing 2, 6-diethylaniline at 0-5 DEG C, and then carrying out coupled reaction on the diazotized 2, 6-diethylaniline and 3, 5-dimethyl sodium phenolate to obtain 4-hydroxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene; the preparation method comprises the following steps: carrying out a nucleophilic substitution reaction on 4-bromoethoxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene and 1, 2-dibromoethane to obtain an intermediate 4-bromoethoxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene; and finally, reacting the intermediate with excessive N-methylimidazole to synthesize the imidazole bromide azobenzene ionic liquid catalyst, namely 4-(N-methylimidazole bromide)-ethoxy-2, 6-dimethyl-2 ', 6'-diethyl azobenzene. The method has the characteristics of simple synthesis method, good water solubility of the catalyst, short reaction time at room temperature, high catalytic efficiency, green and environment-friendly catalytic reaction with water as a solvent, easy separation of products, recyclability of the catalyst and the like.

The invention relates to the technical field of catalysts, and discloses a ZSM-5 type structure-containing all-silicon molecular sieve catalyst and a preparation method thereof, and a cyclohexanone-oxime gas phase Beckmann rearrangement reaction method, the method comprises the following steps: (1) mixing a silicon source, KOH, an organic alkali and water, and hydrolyzing to obtain a colloid mixture; (2) crystallizing the colloid mixture, and optionally concentrating the obtained crystallization mother liquor to obtain molecular sieve slurry; (3) mixing the molecular sieve slurry with a binder, and pulping to obtain molecular sieve-binder slurry; carrying out spray molding on the molecular sieve-binder slurry, and then roasting; and (4) contacting the product obtained by roasting in the step (3) with an alkaline buffer solution containing ammonium salt, ammonia water, magnesium salt and bromine salt, and then drying. The microsphere type all-silicon-1 molecular sieve catalyst prepared by the method has relatively high cyclohexanone-oxime conversion rate and caprolactam selectivity.

This invention relates to the field of catalyst technology, and discloses a method for preparing a microsphere molecular sieve catalyst and a method for the gas-phase Beckmann rearrangement reaction of cyclohexanone oxime, comprising: (1) carbonizing a waste cyclohexanone oxime gas-phase Beckmann rearrangement catalyst; (2) mixing the obtained product with water and slurrying it until the particle diameter in the slurry is less than 20 μm; (3) mixing the slurry, KOH, an organic template agent, and an alcohol; (4) crystallizing the colloidal mixture, and optionally concentrating the crystallization mother liquor to obtain a molecular sieve slurry; (5) mixing the molecular sieve slurry with a binder and slurrying it, spray-forming the molecular sieve-binder slurry, and then calcining it; (6) contacting the product obtained from calcination in step (5) with an alkaline buffer solution containing ammonium salt, ammonia, magnesium salt, and bromide salt, and then drying it. The catalyst obtained by this preparation method has a high cyclohexanone oxime conversion rate and caprolactam selectivity in a fluidized bed reaction system.

The invention discloses a synthesis method of 9-bromoanthracene, and belongs to the technical field of organic synthesis. According to the method, anthracene is used as a raw material, inorganic bromine salt is used as a bromine source, hydrogen peroxide is used as an oxidizing agent, and 9-bromoanthracene is synthesized in a mixed solvent in a high-selectivity manner under the catalysis of composite Lewis acid; and purifying the crude product through stepped step-by-step recrystallization to obtain a high-purity product. Through the synergistic effect of the composite catalytic system and the mixed solvent, generation of a 9, 10-dibromoanthracene byproduct difficult to remove is inhibited from the source, and efficient separation of the product and key impurities can be realized without column chromatography in combination with a gradient cooling fractional crystallization process. The method is green and safe in process, simple to operate, low in cost and easy to industrialize, and the prepared 9-bromoanthracene can meet the application requirements of OLED photoelectric materials and other high-end fields.

The application discloses a kind of polyether sulfone microspheres, preparation method and application, comprising the following steps: step 1: vinyl imidazole bromide salt, acrylic acid and azobisdimethylvaleronitrile are dissolved in solvent, stirring is carried out under nitrogen protection condition, fully reacts, precipitates, and is filtered to obtain polymer;Step 2: the polymer obtained in step 1 is dissolved in solvent to obtain polymer solution;Step 3: the polymer solution obtained in step 2 and polyether sulfone solution are blended, and polyether sulfone microspheres are obtained by electrospinning;The polyether sulfone microspheres obtained by the application have a diameter of 500-800 μm, have a loose porous structure, have a large specific surface area, and have good bilirubin adsorption effect.

The application discloses an alumina-coated diaphragm in the field of lithium ion batteries and a preparation method thereof. The diaphragm comprises alumina particles, a fluorine-containing porous organosilicon compound, a phosphorus-heterocyclic covalent organic framework, a binder, a dispersing agent and deionized water. The fluorine-containing porous organosilicon compound is formed by mixing methyltrimethoxysilane and perfluorohexyltrimethoxysilane with water, reacting to form a sol-gel system after adjusting pH with ammonia water, continuously reacting by adding aminosilane, and then performing rotary evaporation, calcination and grinding; the phosphorus-heterocyclic covalent organic framework is formed by dissolving cyanuric chloride and triphenylphosphine oxide in anhydrous tetrahydrofuran, reacting to form an intermediate by adding imidazole bromide, continuously reacting by adding ethylene glycol, and then performing vacuum drying and grinding. The diaphragm synergistically enhances the interface adhesion and electrolyte wettability through the bifunctional compound, and improves the thermal stability and cycle performance.

The application discloses a ternary eutectic solvent, a hybrid self-lubricating material, a polymer self-lubricating composite material and a preparation method thereof. The raw materials of the ternary eutectic solvent include choline chloride, oxalic acid dihydrate and 1-hexadecyl-3-methyl imidazole bromide; wherein the amount of choline chloride is 25-30 parts, the amount of oxalic acid dihydrate is 35-40 parts, and the amount of 1-hexadecyl-3-methyl imidazole bromide is 0.5-1.0 parts in terms of the weight fraction ratio. The application initiatively synchronously pretreats lignocellulose and two-dimensional materials by using ternary DES (choline chloride / oxalic acid dihydrate / ionic liquid crystal), solves the core problems of poor dispersibility of lignocellulose and agglomeration of two-dimensional materials from the source by using the interfacial activity of ionic liquid and the deconstruction ability of DES, and realizes efficient activation of biomass raw materials.

The application belongs to the technical field of photocatalysts, and particularly relates to a Z-type heterojunction photocatalyst and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: mixing Na2MoO4.2H2O, Bi(NO3)3.5H2O, Bi(NO3)3.5H2O, BSB-Vs and water to perform a second hydrothermal reaction to obtain BSB-Vs@BMO. 19 S 27 Br3 and water to perform a first hydrothermal reaction to obtain the BSB@BMO, or mixing thiourea, 1-hexadecyl-3-methyl imidazole bromide, Bi(NO3)3.5H2O, polyvinylpyrrolidone and ethylene glycol to perform a solvothermal reaction to obtain BSB-Vs; mixing Na2MoO4.2H2O, Bi(NO3)3.5H2O, BSB-Vs and water to perform a second hydrothermal reaction to obtain BSB-Vs@BMO. The Z-type heterojunction semiconductor material provided by the application has a low photogenerated carrier recombination rate and excellent photocatalytic performance.

A urea treatment method in which hypobromite ions are generated by adding a chlorine-based oxidizer and a bromide salt to to-be-treated water containing urea so as to break down the urea in the to-be-treated water and obtain treated water, the method including: a) determining the free residual bromine concentration and the free residual chlorine concentration in the treated water; and b) controlling the added amount of the chlorine-based oxidizer and the bromide salt on the basis of the free residual bromine concentration and the free residual chlorine concentration. The device includes a bromide salt adding means, a chlorine-based oxidizer adding means, a urea decomposition tank, a residual chlorine meter, and a control device for controlling the added amount of the chlorine-based oxidizer by the chlorine-based oxidizer adding means on the basis of the method.

Provided is a water treatment method and the like that enables stable management of water systems. [Solution] According to one aspect of the present invention, there is provided a water treatment method for an aqueous system, comprising a supplying step and a control step, in which the supplying step supplies hypochlorite ions to the aqueous system to be treated, the aqueous system containing a bromide salt and a chlorine stabilizer, and the control step controls the concentration of hypobromite ions in the aqueous system to be treated at one or more of the timings before, during, and after the supplying step.

The invention relates to the technical field of synthesis of pesticide intermediates, in particular to an industrial production process of 2, 4-dichloro-5-nitrophenyl isopropyl ether, which comprises the following steps: reacting 2, 4-dichloro-5-nitrophenol with caustic soda liquid to generate sodium salt by taking methylbenzene as a solvent, then carrying out azeotropic dehydration, and directly adding a catalyst to carry out etherification reaction with isobromopropane to obtain 2, 4-dichloro-5-nitrophenyl isopropyl ether. The catalyst is 2, 4-dichloro-5-nitrophenyl isopropyl ether. The method realizes the recycling of isobromopropane and the recovery of the byproduct bromine salt, reduces the production cost, is more environment-friendly, is short in reaction time, and is suitable for industrial large-scale production.

The application belongs to the technical field of photovoltaic cell materials, and particularly relates to a porous supramolecular assembly modified perovskite film, a preparation method thereof and a photovoltaic cell. The application provides a preparation method of a porous supramolecular assembly modified perovskite film. In the perovskite precursor solution, 4-sulfonate calix[4]arene supramolecules are introduced, a wet film is formed after spin coating, and in-situ host-guest self-assembly occurs with an anti-solvent containing 1-amine ethyl-3-methyl imidazole bromide in the post-processing annealing stage, so that the porous supramolecular assembly is in-situ crosslinked and uniformly distributed at perovskite grain boundaries. The formed supramolecular assembly has a cyclic sequence cavity structure, can be used as a perovskite crystallization template to effectively improve perovskite crystallization nucleation, improve perovskite film crystallization, and thus improve the perovskite film quality, and solve the technical problems of perovskite film efficiency bottleneck and low stability.

Methods, systems, and apparatus for disrupting PFAS comprising adding sulfite to an aqueous solution containing PFAS and then irradiating the aqueous solution with light of 222 nm. The method may comprise adding a sufficient amount of a base to the aqueous solution to raise the pH of the aqueous solution comprising PFAS to about 10 or more. It may also comprise the addition of a halide salt (e.g., a bromide salt or iodised salt), and further the addition of a carbonate. By irradiating the aqueous solution in this manner, 90% or more, or 99% or more, of PFAS in the solution can be destroyed.

The application discloses a synthesis method of 9-bromoanthracene and belongs to the technical field of organic synthesis. Anthracene is used as raw material, inorganic bromide salt is used as a bromine source, hydrogen peroxide is used as an oxidant, and 9-bromoanthracene is synthesized in a mixed solvent under the catalysis of a composite Lewis acid with high selectivity; the crude product is purified through step-by-step fractional recrystallization to obtain a high-purity product. Through the synergistic effect of the composite catalytic system and the mixed solvent, the generation of the difficult-to-remove by-product 9,10-dibromoanthracene is inhibited from the source, and the efficient separation of the product and the key impurities can be realized without column chromatography by combining the gradient cooling fractional crystallization process. The process is green and safe, simple to operate, low in cost and easy to industrialize, and the prepared 9-bromoanthracene can meet the application requirements in high-end fields such as OLED photoelectric materials.

The invention relates to a molecular sieve preparation technology, and aims to provide a method for synthesizing a multistage structure ZSM-5 zeolite molecular sieve by using a bromine salt type ionic liquid. Comprising the following steps: mixing water, a silicon source, an aluminum source, an alkali source and bromine salt type ionic liquid serving as an organic template agent, and uniformly stirring to obtain mixture gel; and after the static crystallization reaction, carrying out suction filtration, washing and drying on the product to obtain the multistage structure ZSM-5 zeolite molecular sieve. According to the present invention, the bromine salt type ionic liquid is adopted as the organic template agent, the precise synthesis of the hierarchical pore ZSM-5 zeolite molecular sieve is achieved through the synergistic mechanism of the morphology orientation regulation and the pore channel in-situ construction, and the product has the unique structure of the lamellar cross playing card house morphology and the macroporous / mesoporous pore channel. As the catalyst has a large specific surface area and a wide silica-alumina ratio synthesis range, the product can improve the reaction activity, the product yield and the service life of the catalyst, and has a potential application value for important catalytic reactions such as propane aromatization and methanol-to-olefin.

The invention relates to a preparation method of a pinoxaden intermediate, which comprises the following steps: reacting 2, 6-diethyl-4-methylphenylmalononitrile with [1, 4, 5] oxadiazepine in the presence of alkali and a copper catalyst to generate the pinoxaden intermediate, the pinoxaden intermediate is 8-(2, 6-diethyl-4-methyl benzene)-1, 2, 4, 5-tetrahydropyrazole-[1, 2-d] [1, 4, 5] oxadiazepine, and the pinoxaden intermediate is an intermediate of 8-(2, 6-diethyl-4-methyl benzene)-1, 2, 4, 5-tetrahydropyrazole-[1, 2-d] [1, 4, 5] oxadiazepine. 5, 5] oxadiaza-7, 9-diketone. According to the invention, the 2, 6-diethyl-4-methylphenylmalononitrile and the [1, 4, 5] oxadiazepine react under the action of the copper catalyst, so that the pinoxaden intermediate can be directly generated, the step of firstly generating an intermediate product from the 2, 6-diethyl-4-methylphenylmalononitrile is omitted, the reaction steps are shortened, the operation is convenient, and the yield is high; meanwhile, no acid is used in the reaction process, so that generation of waste acid and a byproduct bromide salt is avoided, the method is more environment-friendly, and the post-treatment cost is lower.

This invention discloses a novel method for preparing plastic liners for hydrogen storage cylinders, belonging to the technical field of plastic liner preparation for hydrogen storage cylinders. First, a long-chain vinylimidazolium bromide intermediate is prepared through a nucleophilic substitution reaction of N-vinylimidazolium and bromododecane. Then, anion exchange is performed with lithium bis(trifluoromethanesulfonylimide) to synthesize an alkylvinylimidazolium ionic liquid. This ionic liquid is used to modify the surface of nano-calcium carbonate to introduce reactive sites, and synergistically construct an inorganic reinforcement system with silane-modified fumed silica. Next, inorganic fillers are melt-blended with high-density polyethylene and elastomers to form a composite powder. Finally, a crosslinking agent is added, and the mixture is molded using a rotational molding process of "low-temperature melt spreading and high-temperature in-situ crosslinking." By constructing an organic-inorganic crosslinking network, the liner is endowed with excellent dimensional stability, low-temperature toughness, and fatigue reliability under wide-temperature service conditions.

The application provides a method for preparing high-purity multi-valence metal by bromide-based molten salt electrolysis, comprising the following steps: 1) adding dry bromide-based molten salt into an electrolysis device, then heating to above the melting temperature and keeping the temperature to make the bromide-based molten salt in a molten state, wherein the bromide-based molten salt comprises 40-100 wt.% of bromide salt and 0-60 wt.% of chloride salt; 2) adding multi-valence metal and multi-valence metal stabilizing salt into the molten salt obtained in step 1), and obtaining low-valence multi-valence metal salt after soaking; 3) inserting the crude multi-valence metal as an anode and a metal plate as a cathode into the molten salt, and obtaining high-purity metal by constant current electrolysis after power-on. The multi-valence metal obtained by the method has a purity of 99.99% or above and a crystal grain size of 1000 microns or above.

The invention relates to an ion-controllable COF catalyst, a preparation method and application of the ion-controllable COF catalyst in photocatalytic hydrogen production. The method comprises the following steps: step 1, mixing trialdehyde phloroglucinol with an amino-containing phenanthridine bromine salt, carrying out degassing treatment in the presence of a catalyst and a mixed solvent, and sealing; step 2, carrying out solvothermal reaction under a heating condition to obtain a precursor COF-Br containing bromide ions; step 3, the precursor COF-Br is subjected to washing, purification and drying treatment; and 4, dispersing the dried precursor COF-Br in a salt solution containing target anions to carry out ion exchange reaction, and carrying out solid-liquid separation and drying to obtain the ion-controllable COF catalyst. According to the method, a COF precursor containing a cation skeleton is constructed, and specific anions are introduced by utilizing an ion exchange technology, so that the compounding of photo-induced electrons and holes is effectively inhibited, and the photocatalytic hydrogen production efficiency is remarkably improved.

The application discloses a controllable assembly method of nanoparticles. The method is realized by complexing carboxyl-modified pillar[5]arene (CP[5]A) and pyrene butyric acid grafted organic imidazole salt through host-guest interaction. Through a two-step simple substitution reaction, 1-methyl-3-(10-(4-pyrene-1-butanoic acid)-chrysene-1H-imidazole bromide and derivatives containing different carbon numbers are synthesized, which are mixed with the reported CP[5]A to obtain the assembly system. By adjusting the concentration of the host and guest organic matters and the chain length of the guest organic matter, AuNPs can be controllably assembled and form well-defined one-dimensional and two-dimensional structures, especially the fine assembly of AuNPs can be realized. The assembly system has high stability and can exist stably for months. Meanwhile, the assembly system has good universality and can be used to assemble different types of nanoparticles, such as silver nanoparticles, silver nanosheets, iron gold nanoparticles and gold nanorods, and is a simple and universal assembly platform.

The invention discloses an imidazolyl polyionic liquid catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: taking ionic liquid 1-vinyl-3-butylimidazole bromine salt or 1-vinyl-3-butylimidazole chlorine salt as a monomer, adding a cross-linking agent and an initiator, and carrying out polymerization reaction to generate polyionic liquid; and reacting the obtained polyionic liquid with metal chlorine salt to generate the imidazolyl polyionic liquid catalyst. The imidazolyl polyion liquid catalyst provided by the invention has high activity and high stability, the dissolution loss of the active components is less, and the imidazolyl polyion liquid catalyst can be repeatedly used and is low in cost. The imidazolyl polyion liquid catalyst disclosed by the invention is used for synthesizing 2, 4, 6-trimethylbenzoic acid, and has the advantages of simplicity and convenience in operation, high reaction efficiency, good selectivity, few side reactions and the like.

The invention discloses a treatment method for recovering bromine from pyroxasulfone synthesis wastewater. In the prior art, bromine is recovered by adopting a chlorine oxidation method, chlorine is low in price, but as highly toxic gas with strong oxidizing property, the chlorine is extremely high in corrosivity, and relatively high potential safety hazards and environmental risks exist. According to the method disclosed by the invention, the characteristic that both the oxidation mother liquor for pyroxasulfone synthesis and the brominated wastewater are acidic is fully considered, and under the acidic condition, H2O2 in the oxidation mother liquor is used as an oxidizing agent to oxidize bromine salt in the brominated wastewater into bromine. H2O2 has the advantages that the oxidizing capacity is high, decomposition products are water and oxygen, the environment is protected, and residues are avoided. By means of the treatment method, bromine in pyroxasulfone synthesis wastewater can be efficiently recycled through the resin, the resource utilization rate is increased, harm to the environment is reduced, and a green, safe and efficient solution is provided for treatment of pyroxasulfone synthesis wastewater.

The application discloses an ethyne hydrochlorination reaction catalyst, which is prepared by stirring nitrogen-containing precursors, phosphorus-containing precursors, copper sources and organic solvents uniformly, drying, high-temperature calcination and acid washing; the nitrogen-containing precursors are one or more of 1-butyl-3-methyl imidazole bromide, 1-butyl-3-methyl imidazole chloride, 2-methyl imidazole and pyridine; the phosphorus-containing precursors are one or more of phosphoric acid, triphenyl phosphine, tetraphenyl phosphonium bromide and tetraphenyl phosphonium chloride; and the copper source is copper chloride or copper nitrate. The catalyst obtained by the application has the advantages of high stability and high activity.

The application discloses a method for catalyzing alpha-C-H halogenation of carboxylic acid based on a needle tip electrostatic field, and belongs to the technical field of catalytic chemistry. Alpha-C-H containing carboxylic acid and a metal bromide salt are selected as reaction substrates, a local electrostatic field is applied by a metal needle tip of a scanning tunneling microscope (STM), alpha-bromination of the carboxylic acid is induced under normal temperature and without an additional chemical catalyst, and alpha-brominated carboxylic acid is synthesized. Compared with a traditional HVZ reaction, the method avoids the use of a highly toxic reagent such as phosphorus trihalide and harsh high-temperature conditions, so that the reaction process is more green and mild, and no additional halogenating agent or catalyst needs to be introduced, thereby providing a new path for synthesis of alpha-brominated carboxylic acid, which is environment-friendly, simple to operate and does not depend on toxic reagents.

The application provides a water-based zinc-bromine battery, and belongs to the field of energy storage batteries.The water-based zinc-bromine battery comprises a positive electrode, a negative electrode and a water-based electrolyte, wherein the positive electrode comprises a first substrate and a solid-phase bromide active substance coated on the first substrate; the negative electrode comprises a second substrate, a metal / metal zinc heterojunction interface layer and metal zinc electrodeposited on the metal / metal zinc heterojunction interface layer; the water-based electrolyte comprises a mixed aqueous solution of a zinc salt, a bromine salt, a pH regulator and a zinc negative electrode stabilizer; wherein a complexing agent is reacted with bromine to obtain the solid-phase bromide active substance, and the solid-phase bromide active substance is mixed with a conductive agent, a binder and a solvent and then coated on the first substrate.

This invention discloses a plasma metal Bi / oxygen vacancy-BiOBr photocatalytic material, its preparation method, and its applications. The preparation method includes the following steps: dissolving a bromide salt in 1,2-propanediol to obtain a dispersion; adding a bismuth salt to the dispersion and mixing thoroughly to obtain a reaction solution; subjecting the reaction solution to a hydrothermal reaction; and cooling, separating, washing, and drying the resulting material to obtain the target product. This invention uses 1,2-propanediol as a solvent and a reducing agent, simultaneously introducing plasma metal Bi and oxygen vacancies into BiOBr through a hydrothermal reaction to enhance its catalytic performance. Furthermore, the addition of lignin to the reaction system further promotes the formation of plasma metal Bi and oxygen vacancies. The material prepared by this invention can be used for the oxidation-reduction of 2,4-dichlorophenol in water and for CO2 reduction, effectively remediating the environment and achieving energy conversion, showing great application potential.

The application relates to the technical field of petroleum additives, and is a molybdenum-based nano surfactant for composite oil displacement and a preparation method thereof.The molybdenum-based nano surfactant for composite oil displacement is obtained by the following method: mixing deionized water, nano molybdenum disulfide, acrylamide, 3-methyl acryloyloxy-2-hydroxypropyl sodium sulfonate, allyl phenyl sulfone, 1-vinyl-3-ethyl imidazole bromide salt, allyl alcohol polyoxyethylene ether, sorbitan monostearate and buffer salt to obtain a mixed solution, and then adding an initiator into the mixed solution to react and obtain the molybdenum-based nano surfactant for composite oil displacement.The molybdenum-based nano surfactant for composite oil displacement not only has ultralow surface tension and interfacial tension, but also has high viscosity reduction effect.In addition, the molybdenum-based nano surfactant for composite oil displacement is synthesized by using a one-pot method, raw materials are easy to obtain, the synthesis process is simple, there is no byproduct, and the synthesis is safe and environmentally friendly.

The invention provides an ionic gel functionalized silica gel multi-mode chromatographic stationary phase as well as a preparation method and application thereof. The preparation method comprises the step of forming a hydrogel coating layer prepared from 1-vinyl-3-butylimidazolium bromide, 3-acrylamido phenylboronic acid and 2-hydroxyethyl acrylate on the surface of silica gel in a mode of combining chemical crosslinking, physical crosslinking and physical coating. The preparation path is simple, the operation is convenient, and a plurality of action sites such as hydroxyl, benzene ring, alkyl chain and imidazole cation exist before the stationary phase and an analyte, so that the chromatographic stationary phase is compatible with a plurality of modes of hydrophilicity, reverse phase and ion exchange, the purpose of one column with multiple purposes can be achieved, and the method is suitable for industrial production. In different modes of application, the compound has excellent separation selectivity on nucleoside / basic group, alkaloid, pesticide, polycyclic aromatic hydrocarbon and inorganic anion.