197 results about "Divinylbenzene" patented technology

The invention discloses a method for catalyzing melamino-formaldehyde resin methylation reaction by solid acid. According to the invention, epoxy silane coupling agent grafted modified nanocellulose is introduced into sulfonated styrene-divinyl benzene cross-linked copolymer microspheres for in-situ crystal cross-linking, so that the problems that the traditional sulfonated polystyrene resin is poor in mechanical strength and solution solubility resistance, low in cycle index, easy to swell and fall off and the like are effectively solved; the prepared solid acid resin has the characteristics of high reaction activity, high proton transfer rate, high mechanical strength, high cyclicity and easiness in solid-liquid separation, and by utilizing the solid acid resin to catalyze the etherification reaction of the melamino-formaldehyde resin, the reaction temperature and the production energy consumption are reduced, the reaction time is shortened, the product quality and the production efficiency are improved, and the production cost is reduced. The problems of environmental protection and energy consumption caused by the generation of a large amount of VOCs in the etherification reaction of the traditional liquid catalyst for synthesizing the high-etherified melamine formaldehyde resin and the by-product inorganic salt in the subsequent process are solved.

The invention discloses zwitterionic concrete internal curing hydrogel based on humidity-pH dual responsiveness and a preparation method of the zwitterionic concrete internal curing hydrogel, and belongs to the technical field of building materials. The water-based cleaning agent is prepared from the following raw material components in percentage by weight: 6%-8% of N-vinyl imidazole, 8%-12% of 2-methylimidazole, 6%-8% of 2-acrylamido-2-methylpropanesulfonic acid, 2%-4% of sodium p-styrenesulfonate, 26%-30% of acrylic acid, 18%-21% of N-vinyl pyrrolidone, 15%-18% of glycidyl methacrylate, 2%-5% of nano montmorillonite powder, 0.05%-0.1% of divinyl benzene, 0.05%-0.15% of N, N-dimethylformamide and the balance of water. The invention discloses an anti-freezing agent which is prepared from the following components in percentage by weight: 0.1%-0.3% of N, N-methylene bisacrylamide, 0.1%-0.3% of 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propane-1-ketone, 0.5%-0.8% of ammonium persulfate and 0.5%-0.8% of sodium hydrogen sulfite. Double response to the internal humidity and pH value of the concrete can be achieved, and the requirement for precise internal curing of modern high-performance concrete is met.

The invention relates to the technical field of adsorption materials, in particular to modified adsorption resin for a high-impurity n-heptane raw material and a purification method of the modified adsorption resin. The resin is prepared from the following raw materials: polystyrene-divinylbenzene resin microspheres, chloromethyl ether, 1, 3, 5, 7-tetra (4-chloromethylphenyl) adamantane, 2-methylimidazole and the like. During preparation, polystyrene-divinylbenzene resin microspheres are subjected to chloromethylation to introduce active sites, adamantine crosslinking to construct rigid pore channels, and imidazolyl functionalization to introduce specific adsorption sites. During purification, dynamic adsorption is performed after pretreatment of two stages of adsorption columns, mild regeneration is performed by using an ethanol-acetone mixed solution, isoparaffin, aromatic hydrocarbon and oxygen-containing compounds can be synchronously removed, high-purity n-heptane is obtained, the resin regeneration performance is excellent, and the whole process is easy to industrialize.

The application relates to the field of shoe-making moulds and high polymer foaming forming technology, and discloses a running type basketball shoe tree and a production process thereof. The shoe tree is made of raw materials containing the following components by weight: high-density polyethylene, ethylene-1-octene copolymer, precipitated barium sulfate, dicumyl peroxide, divinylbenzene and powder pre-dispersed foaming agent. The production process of the shoe tree comprises the following steps: constant temperature closed mixing, melt extrusion and air cooling and granulation of all the materials to obtain base rubber particles, injection of the rubber particles into a mould after heating to complete chemical crosslinking and microporous foaming, superposition of a sinusoidal servo pressure maintaining flow field on the material to implement mechanical kneading of the material to promote molecular chain segment relaxation and rearrangement when the temperature is lowered to the semi-cured window period, and finally forced cooling and shaping in a tree to obtain the shoe tree. Through polymer blending and heterogeneous nucleation, and in combination with the sinusoidal servo flow field mechanical kneading to eliminate residual stress, the size precision and mechanical support consistency of the shoe tree are improved.

The invention belongs to the technical field of catalyst preparation, and particularly relates to an ozone catalyst for water treatment and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing iron-manganese modified zeolite subjected to hot water treatment, TEOS hydrolysate, VTMS hydrolysate, a VSNa solution, divinyl benzene, an initiator, sodium chloride and CMC to obtain slurry, treating the slurry into wet particles, and drying the wet particles to obtain the ozone catalyst for water treatment. Carrying out heating curing treatment on the wet particles to obtain a catalyst precursor, washing the catalyst precursor with deionized water, and then carrying out heat treatment and cooling to obtain the catalyst. The method can effectively reduce the effluent COD of the petrochemical wastewater containing sodium oxalate, and is high in long-term use stability.

The invention belongs to the technical field of aerosol detection, and particularly relates to an aerosol adsorption material, a preparation method, an aerosol collection device and a detection system. The aerosol adsorption material comprises a polymer microsphere skeleton with a porous structure and a metal organic framework nano-material growing on the surface of the polymer microsphere skeleton, and the metal organic framework nano-material radiates outwards and grows along the surface of the polymer microsphere skeleton; wherein the polymer microsphere skeleton comprises a polystyrene-divinyl benzene microsphere, and the metal organic framework nano material comprises Zn-BDC (zinc-boron dichloride). A Zn-BDC metal organic framework nano material is grown on a porous polystyrene-divinyl benzene microsphere skeleton in a radiation manner, so that the composite adsorbent with a multilevel structure is constructed. According to the design, the macrostructure advantage of a polymer skeleton and the nano-scale ultrahigh adsorption performance of an MOF material are combined, synergistic interaction can be achieved, and efficient and accurate capture of all aerosol components (especially nicotine, characteristic aroma small molecules and the like) is achieved.

A macroporous cation exchange resin and its preparation and application method are disclosed. The method involves dispersing polystyrene-divinylbenzene microspheres in dichloroethane to obtain a microsphere suspension. A sulfonating agent, a mixture of fuming sulfuric acid and chlorosulfonic acid, is then slowly added dropwise under cooling and stirring conditions. After the addition is complete, heating is initiated to trigger a polysulfonation reaction. Once the reaction is complete, the reaction mixture is slowly poured into ice water and continuously stirred and diluted until the solution pH reaches 2.5. The solution is then filtered, washed, and dried to obtain a solid resin. This invention simultaneously introduces a matched number of sulfonic acid groups and sulfone groups onto the polystyrene-divinylbenzene backbone. Utilizing the electron-withdrawing effect of the sulfone groups and the rigid framework they form, the stability of the C-H and C-S bonds in the resin is enhanced. This solves the problems of resin structure damage, rapid decline in separation performance, and significantly shortened service life associated with existing cation exchange resins used in treating chromium plating aging solutions.

The invention relates to the technical field of resin preparation, in particular to macroporous weak-base anion exchange resin as well as a preparation method and application thereof. The crosslinked styrene-divinylbenzene microsphere matrix obtained by a preparation process of regulating and controlling the crosslinked styrene, the divinylbenzene and the pore-foaming agent and adding the crosslinking agent has the advantages of high mechanical strength, controllable specific surface area, adjustable pore diameter and the like. A macroporous weak base anion exchange resin; according to the method, the total exchange capacity reaches 4.8 mmol / g or above, the resin sphericity in the fatigue strength of 100 cycles is 90% or above, the resin sphericity in the fatigue strength of 300 cycles is 70% or above, the treatment volume ratio (BV) in the first cycle in the xylose decolorization process is 80 or above, and the purposes of improving the resin quality, reducing the environmental pollution and improving the energy efficiency ratio can be achieved.

This invention relates to the field of filter material production technology, specifically to a novel filter material and its preparation process, comprising the following steps: drying and swelling styrene-divinylbenzene copolymer spheres, then adding them to a sulfonation tank; adding concentrated sulfuric acid to the sulfonation tank, starting a first motor to drive a stirring blade for stirring, and heating to carry out the sulfonation reaction; initially, the stirring blade rotates counterclockwise; at the end of the reaction, a second motor is started to drive a lead screw to rotate, causing the moving parts and stirring blades to move to the bottom of the rotating shaft, while simultaneously the gear rotates under the action of the gear plate, causing the stirring blades to rotate 180°, and then rotate clockwise; after sulfonation, a strongly acidic cation exchange resin is obtained. This invention, by setting a driving structure to change the position of the stirring blades according to different reaction stages, and simultaneously changing the tilt angle of the stirring blades, avoids the styrene-divinylbenzene copolymer spheres floating on the surface of concentrated sulfuric acid or accumulating at the bottom of the sulfonation tank, thus preventing a decrease in yield.

The application belongs to the field of ion exchange membranes, and discloses a crosslinked fluorine-containing ion exchange membrane and a preparation method and application thereof. Styrene sulfonic acid and 4-vinylbenzyl pentafluorophenol ether are pre-polymerized in an inert gas atmosphere, and divinylbenzene is added in the inert gas atmosphere, and the mixture is poured into a smooth horizontal tank for in-situ crosslinking polymerization reaction. Solvents in the system are evaporated and removed to obtain a pre-prepared ion exchange membrane. After sufficient sulfonation, the ion exchange membrane is washed with 0.5-1 mol / L dilute sulfuric acid and deionized water in sequence until the washing liquid is neutral, and is naturally dried at room temperature. The raw materials are widely sourced and inexpensive, the cost is effectively controlled, the preparation process is relatively simple, the conditions are mild, and the application is suitable for large-scale industrial production. The application has good mechanical properties, high vanadium battery efficiency, excellent durability or corrosion resistance, and can replace the existing ion exchange membrane to be applied to the field of flow battery energy storage.

The application provides a method for improving the mechanical properties of ceramic matrix composites, and relates to the technical field of ceramic matrix composite preparation. The method uses polymethylsilane (PMS) as a ceramic precursor, silicon carbide powder as a filler, divinylbenzene (DVB) as a cross-linking agent, introduces boron nitride as a sintering aid and a second-phase toughening component, and is prepared through six core processes of constant-temperature mixing under nitrogen protection, carbon fiber cloth vacuum impregnation, laminating exhaust forming, tungsten bead weight matching shaping, two-stage gradient sintering and multiple precursor impregnation and densification to obtain high-performance continuous carbon fiber reinforced silicon carbide composite materials. The sintering promotion effect and dispersion toughening mechanism of boron nitride are used, and the optimized forming process of layer-by-layer exhaust and weight matching shaping is used to effectively reduce the porosity of the matrix, and significantly improve the material density, bending strength and fracture toughness. The process parameters of the application are quantifiable and controllable, the batch stability is high, no special equipment is needed, and the application can be adapted to large-scale production.

The application relates to the technical field of chemical materials, and discloses a super-hydrophobic heat-insulating composite material, a preparation method and application thereof. Raw materials for preparing the super-hydrophobic heat-insulating composite material contain styrene, divinylbenzene, functionalized styrene, hollow glass microbeads modified by a silane coupling agent, inorganic fillers, an initiator, an emulsifier and water; the super-hydrophobic heat-insulating composite material has a thermal conductivity coefficient of less than or equal to 0.03 W / m.K and a water contact angle of more than 150 DEG. The composite material has excellent heat-insulating performance and super-hydrophobicity, and has the characteristics of high mechanical performance and uniform pore size distribution, and has a good application prospect in the fields of heat insulation, heat preservation, waterproofing and the like.

The application belongs to the technical field of high-frequency high-speed materials for electronic packaging, and particularly relates to a low-dielectric acenyl copolymer resin for M9 copper-clad plate and an ATRP preparation method thereof. A two-step method is used for full-process ATRP active controlled polymerization, and the two-step method comprises the following steps: S1, a single-end active bromine end group is prepared on a norbornene macromolecular initiator by ATRP polymerization with 3-bromocyclohexene as an ATRP initiator, and the length and structure of the norbornene segment are controlled; and S2, ATRP controlled copolymerization of acenylene monomers and divinylbenzene crosslinking monomers is carried out through the norbornene macromolecular initiator to obtain an acenyl copolymer resin.

The invention belongs to the technical field of medical materials, and particularly relates to an adsorption material for removing low-density lipoprotein as well as a preparation method and application of the adsorption material. The adsorption material comprises a carrier and a ligand immobilized on the carrier, wherein the carrier is obtained by grafting and modifying polymer microspheres through glycidyl methacrylate, and the polymer microspheres comprise at least one of polystyrene divinyl benzene resin microspheres and polymethacrylate resin microspheres; the ligand contains a group with negative electricity.

The present application relates to the technical field of new materials, in particular to a porous ulinastatin adsorbent with a responsive shell and a preparation method thereof.The porous ulinastatin adsorbent with a responsive shell is a full-synthetic polymer matrix, and has a solid structure.A high-crosslinking-degree polyvinyl alcohol / styrene / divinylbenzene core and a MOF nanoparticle-enhanced framework endow the porous ulinastatin adsorbent with a responsive shell with excellent mechanical strength, and the porous ulinastatin adsorbent with a responsive shell can withstand the pressure in an industrial chromatography column and is not prone to breakage.Because both recognition and desorption are physical processes, the replacement frequency and overall cost of the porous ulinastatin adsorbent with a responsive shell in the production process are greatly reduced, and a reliable guarantee is provided for industrial large-scale and continuous production.

The application discloses a bisoxazoline pyridine functionalized porous organic polymer and preparation and application thereof; firstly, a styryl functionalized PyBox monomer (VPyBox) is designed and synthesized, and VPyBox, styrene and divinylbenzene are subjected to free radical polymerization under initiation of azobisisobutyronitrile in a certain proportion to obtain a series of porous organic polymers (POP-PyBox); the POP-PyBox can be used as a solid N , N , N tridentate ligand for Co-catalyzed hydrosilylation of arylalkynes with diphenylsilane; the heterogeneous catalyst system developed by the application has a catalytic activity comparable to that of a homogeneous catalyst reported in the literature, and the catalyst is easy to separate and recover; the recovered catalyst can be recycled for more than 6 times, which can not only greatly reduce the preparation cost of vinylsilane, but also simplify the post-treatment process and reduce the three wastes, and has a good practical application prospect.

The application discloses a pyrrole polymer electrolyte film in an energy storage lithium battery and a preparation method and application thereof, and belongs to the polymer electrolyte field. The method comprises the following steps: reacting 1-methyl pyrrolidine and bromine n-butane to prepare 1-methyl-1-butyl pyrrolidine bromide; preparing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid by mixing the 1-methyl-1-butyl pyrrolidine bromide and lithium difluoromethane sulfonimide; mixing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bistrifluoromethanesulfonimide, divinylbenzene and benzoin ethyl ether uniformly, coating and curing to obtain a pyrrole ionic liquid polymer electrolyte film. The application combines the molecular configuration of the pyrrolidine-based ionic liquid and the topological structure of the polymer network, realizes triple optimization of ion transmission-mechanical strength-interface stability.

The present application provides a suspension containing radioactive microspheres, a preparation method and application thereof. The radioactive microspheres include resin microspheres and a radionuclide loaded on the resin microspheres, the material of the resin microspheres includes at least one of polystyrene, polyethylene or polydivinylbenzene, or a crosslinked polymer thereof, the average particle size of the radioactive microspheres is 25-40 μm, and by controlling the non-spherical ratio of the radioactive microspheres within 5%, the distribution density of the microspheres in the tumor part is improved, the killing effect on the tumor is improved, and the incidence of adverse events is reduced.

The invention discloses a preparation method and application of a hydrophilic separation medium, the hydrophilic separation medium comprises a polymer hydrophilic medium and a hydrophilic group modified on the surface of the medium, the solid medium is PS / GMA / DVB microspheres, and when in use, the hydrophobic separation medium comprises a PS / GMA / DVB solid matrix and a hydrophilic coating layer coated on the surface of the PS / GMA / DVB solid matrix. The hydrophilic coating layer is used for modifying hydrophilic groups through epoxy groups and benzene ring chemical bonds, and the hydrophilic coating layer is introduced to the surface of the PS / GMA / DVB solid substrate, so that the surface of the hydrophobic PS / GMA / DVB solid substrate is effectively coated in the coating layer, and therefore, the hydrophilic action separation medium can avoid the adverse effect of the hydrophobic substrate on separation of polysaccharide, and the separation efficiency of the PS / GMA / DVB solid substrate is improved. The PS / GMA / DVB solid matrix is a polymer microsphere prepared by taking a polystyrene-glycidyl methacrylate-divinyl benzene polymer as a matrix, and compared with a silica gel matrix, the PS / GMA / DVB solid matrix can enable the separation medium to have more excellent chemical stability and modification activity.

The invention discloses a cationic chromatographic filler preparation method based on RAFT (reversible addition-fragmentation chain transfer) polymerization, which comprises the following steps: synthesizing monodisperse linear polystyrene microsphere seeds by adopting a dispersion polymerization method, synthesizing polystyrene-divinyl benzene microspheres with high crosslinking degree by adopting a single-step seed swelling method, carrying out reversible addition-fragmentation chain transfer polymerization, and carrying out column packing by adopting a homogenization method. Compared with the traditional free radical polymerization, the preparation method not only retains the multifunctionality of the traditional free radical polymerization, but also solves the problem that the traditional free radical polymerization cannot well control the molecular weight and macromolecular structure, and is simple in process, convenient to operate and suitable for industrial production. The method has a potential application prospect in specific challenges of chromatographic separation and biomacromolecule separation.

The invention relates to a preparation method of a polymaleic anhydride-proline / COF hollow mesoporous catalyst as well as a product and application thereof, and belongs to the technical field of preparation of functional materials. A self-stabilization precipitation polymerization method is adopted, no stabilizer or surfactant needs to be added, and the prepared microspheres are clean in surface, simple in post-treatment, free of stirring, simple in reaction system, short in reaction time and high in polymerization efficiency. The preparation method comprises the following steps: firstly, synthesizing COF serving as a template from 4, 4-bibenzaldehyde and s-triphenylamine, and performing dehydration polymerization on residual-NH2, divinyl benzene, maleic anhydride and proline to form a special hollow mesoporous catalyst which is relatively good in crystallinity, high in specific surface area, uniform in pore distribution and compact in structure arrangement, namely a polymaleic anhydride-proline / COF hollow mesoporous catalyst. Excellent stereoselectivity and yield are obtained by catalyzing direct nitro-Mannich asymmetric cascade reaction, and the preparation method is simple and high in yield.

The present disclosure discloses a rubber filler, a rubber composite including the same, a preparation method therefor, and use thereof. The rubber filler includes polydivinylbenzene microspheres and polydopamine-modified white carbon black loaded on the polydivinylbenzene microspheres; wherein the mass ratio of the polydivinylbenzene microspheres to the polydopamine-modified white carbon black is 1:(0.5-20). The rubber composite includes: a solution polymerized crude rubber and the rubber filler; wherein the rubber filler is added in an amount of 10-60 wt % of the dry basis mass of the solution polymerized crude rubber. The present disclosure uses polydivinylbenzene microspheres loaded with polydopamine-modified white carbon black as the filler, solving the problem that the white carbon black is apt to agglomerate and the white carbon black has poor binding force with the rubber. The rubber composite obtained by the present disclosure is suitable for manufacturing green tires.

This application relates to the field of polymer materials, specifically disclosing a resin for removing nitrate nitrogen from high-concentration sulfate solutions and its preparation method. The preparation method includes the following steps: S1, dispersing an oil-phase solution containing styrene, divinylbenzene, a porogen, and an initiator in an aqueous solution, polymerizing, and then washing with a solvent to obtain porous polymer spheres; S2, subjecting the obtained porous polymer spheres to chloromethyl ether for chloromethylation treatment to obtain a pre-modified resin; S3, subjecting the pre-modified resin to an amination reaction with an amination reagent to obtain a nitrate-removed resin; the nitrate-removed resin has a pore size of 2-10 nm accounting for 50-90%; this application also discloses the nitrate-removed resin prepared by the above preparation method. This application has the characteristic of achieving the removal of nitrate nitrogen from high-concentration sulfate wastewater.

The invention relates to the technical field of biology, in particular to a magnetic microsphere, a preparation method and application thereof and a reagent containing the magnetic microsphere. The preparation method comprises the following steps: firstly, preparing carboxyl-containing polymer microspheres by a one-step method, then carrying out heat treatment under an alkaline condition, and then carrying out THF oscillation to finally prepare porous polystyrene carboxyl microspheres with uniform pore channels, meanwhile, avoiding using divinyl benzene as a cross-linking agent, reducing the luminous background of the finally obtained magnetic microspheres, and improving the luminous efficiency of the magnetic microspheres. The method can be better applied to the field of chemiluminescence immunoassay. Due to the existence of a surface porous structure and carboxyl, the stability and the functionalization degree of the magnetic material are improved, the problems of magnetic leakage and magnetic shell layer falling are avoided, the surface of the porous ball is smoother and more uniform, and a solid foundation is laid for the subsequent coating process and reduction of non-specific adsorption of the surface of the magnetic ball; the magnetic ball is prepared by using a grinding method, and has the advantages of safety, no toxicity, easiness in operation, no pollution and easiness in industrial popularization.

This invention provides a solid acid catalyst comprising a divinylbiphenyl polymer as a backbone and a sulfonate group as an active center; wherein the divinylbiphenyl polymer comprises substituted or unsubstituted divinylbiphenyl monomer structural units and optionally substituted or unsubstituted divinylbenzene monomer structural units; in both the substituted or unsubstituted divinylbiphenyl monomer structural units and the substituted or unsubstituted divinylbenzene monomer structural units, the substituents are each independently C1-C5 alkyl groups. This invention selects suitable polymeric monomers and polymerizes them to obtain a polymer backbone with a stable backbone structure and a large specific surface area; after sulfonation, the backbone structure is maintained, and the resulting catalyst has a stable acid active center.

The invention discloses a method for modifying a microsphere by using a styrene-maleic anhydride copolymer or a derivative of the styrene-maleic anhydride copolymer, the microsphere and application of the microsphere. The styrene-maleic anhydride copolymer or the derivative of the styrene-maleic anhydride copolymer is used as an enhancement and functionalization precursor; the preparation method comprises the following steps: coating internal pores and surfaces of matrix microspheres such as polymethacrylate, polystyrene-divinyl benzene or agarose with the covalently-bonded network-shaped support structure formed on the surface of a microsphere skeleton through an in-situ cross-linking reaction. According to the method, the mechanical strength of the microspheres is remarkably improved, high-density functionalization of the surfaces of the microspheres is synchronously achieved, the enhancement effect is uniform, pore channels are not blocked, and the obtained microspheres have excellent compression resistance, improved chemical stability and rich subsequent coupling reaction sites and are widely applied to preparation of high-performance chromatography packing, adsorbents or drug carriers.

The invention relates to the technical field of resin preparation, in particular to zirconium-loaded chromium removal resin as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing methyl acrylate, divinyl benzene and dibenzoyl peroxide to obtain a homogeneous organic mixture; mixing water, cellulose, sodium chloride and the methylene blue solution to obtain a mixture; mixing the homogeneous organic mixture, the mixed material and a pore-foaming agent, then carrying out heat treatment, recovering the pore-foaming agent to obtain a polyacrylic acid-divinylbenzene copolymer, and the like, so as to obtain the zirconium-loaded chromium-removing resin. The zirconium stability of the zirconium-loaded chromium removal resin is very good, and the resin-loaded zirconium shedding rate is less than 50% after the resin is soaked in 1 + 1 hydrochloric acid for 48 h; the zirconium-loaded chromium removal resin can effectively remove chromium metal in the cobalt chloride solution, the chromium metal is less than 0.01 mg / L, and the requirements of customers are met.

To provide a porous resin bead for suppressing a rise in back pressure in a reaction vessel and stably producing a nucleic acid without liquid feeding failure in a process of synthesizing a nucleic acid. A porous resin bead characterized by consisting essentially of a styrene-hydroxystyrene-divinylbenzene-phenyl methylene malononitrile copolymer.

The invention relates to a method for preparing a high-purity lithium difluoro (oxalato) borate solid through a low-temperature melting method, and belongs to the technical field of lithium battery electrolyte additives. The preparation method comprises the following steps: under the protection of argon, adding lithium oxalate, boric acid and lithium fluoride into a reaction kettle, uniformly stirring and mixing, and carrying out a low-temperature melting reaction to form a molten reaction product; naturally cooling the molten reaction product to room temperature, cooling and crystallizing, and separating out solid crystals; washing the solid crystals with absolute ethyl alcohol, performing centrifugal separation, and removing surface impurities through a modified resin adsorbent; drying the washed solid crystals in a vacuum drying oven to obtain a high-purity lithium difluoro (oxalato) borate solid; the modified resin adsorbent is prepared from styrene-divinylbenzene copolymer resin, dichloroethane, allyl phosphine dichloride, benzoyl peroxide and tetraallyl silicate. The lithium difluoro (oxalato) borate prepared by the method is high in purity and high in yield, and meets the use requirements of a high-energy-density lithium ion battery electrolyte.

The invention relates to the technical field of electronic gas purification, in particular to silicon-oxygen-silicon-containing polydivinylbenzene and a preparation method and application thereof, and the silicon-oxygen-silicon-containing polydivinylbenzene comprises a polydivinylbenzene skeleton; a silicon-oxygen-silicon bond is chemically bonded on the polydivinylbenzene skeleton. The silicon-oxygen-silicon-containing polydivinylbenzene is prepared by adopting an in-situ synthesis method, the silicon-oxygen-silicon-containing polydivinylbenzene reacts with the dry hydrogen bromide gas to obtain the silicon-bromine bond-containing polydivinylbenzene, and the water content in the hydrogen bromide gas can be reduced through hydrolysis reaction. The silicon-oxygen-silicon-containing polydivinylbenzene has stable properties, is environment-friendly in the preparation and transfer processes and the use process of the silicon-oxygen-silicon-containing polydivinylbenzene as a water removal material, does not introduce metal impurities, and has a good water removal effect.