182 results about "Hydrogen bromide" patented technology

The invention relates to a synthetic method of brominated polystyrene with high thermal stability. The synthetic method comprises the following steps: S01, dissolving polystyrene in a halogenated hydrocarbon solvent in a reaction bottle to obtain a polystyrene solution; s02, adding aluminum chloride and bromine into another reaction bottle; s03, introducing hydrogen bromide gas into the reaction bottle in S02, and starting stirring to react at room temperature; s04, after the reaction in the step S03 is finished, reducing the temperature of the polystyrene solution in the step S01 to the reaction temperature, starting stirring, adding a free radical inhibitor, and dropwise adding the bromine and catalyst mixed solution obtained by the reaction in the step S03 into the polystyrene solution; s05, after dropwise adding is finished, adjusting the temperature to the heat preservation temperature, and carrying out heat preservation reaction for a period of time; and S06, after the heat preservation is finished, carrying out post-treatment to obtain the brominated polystyrene. According to the synthetic method of brominated polystyrene, the halogenation phenomenon of a main chain can be inhibited, the use of a catalyst is reduced, and the thermal stability of brominated polystyrene is improved.

The invention relates to a method for extracting bromine from a bromine-containing water sample through electrooxidation, in particular to a method for extracting bromine from brine containing various impurity ions, especially high-concentration Cl <-> ions and low-concentration Br <-> ions, which is mainly used for reducing the interference of the Cl <-> ions and improving the recovery rate of the Br <-> ions by selecting a proper oxidation potential. The process is used for optimally selecting the oxidation potential of bromine ions so as to achieve high-recovery-rate bromine extraction, and comprises the following steps: 1) adjusting the pH value of a bromine-containing water sample to be acidic; 2) carrying out electrochemical oxidation on the bromine-containing water sample subjected to acid adjustment to convert bromine ions into bromine gas; and 3) blowing the generated bromine gas to the absorption device through the aeration device. The hydrogen bromide solution is introduced to adjust the pH of the absorption product solution to be acidic, so that bromate is converted into bromide, and finally, a high-quality sodium bromide product can be obtained.

The invention relates to the technical field of fireproof plates, and discloses a flame-retardant fireproof plate material and a preparation method thereof. Modified benzoxazine, an aromatic bromine modified phosphate flame retardant, polyvinyl chloride, lignocellulose and calcium carbonate are mixed, stirred, pressed, maintained and cut, and the flame-retardant fireproof plate material is obtained. Nitrogen and oxygen six-membered heterocycles in benzoxazine form a stable compound at a high temperature to prevent flame propagation; the silicon element promotes carbonization of combustion products to form a carbonaceous layer, and a cross-linked network formed by silicon-oxygen bonds improves the mechanical property of the fireproof plate material; a net-shaped structure formed by boron-oxygen bonds has high flame retardance; hydrogen fluoride generated by the fluorine element can interrupt the combustion chain reaction; aromatic bromine generates hydrogen bromide to cover the combustion surface, so that a flame-retardant effect is achieved; a carbonization layer is formed on the surface of the fireproof plate material through polymetaphosphoric acid generated by phosphate, so that a flame-retardant effect is achieved; the aromatic bromine modified phosphate flame retardant plays a plasticizing role in polyvinyl chloride, and the mechanical property of the polyvinyl chloride is improved.

A process for producing propylene and hydrogen from propane, the process comprising the steps of: a) reacting a mixture comprising propane and bromine to produce a first reaction mixture comprising bromopropane and hydrogen bromide, b) subjecting the first reaction mixture obtained in step a) to at least one separation step to obtain a bromopropane-rich composition and to obtain a hydrogen bromide-rich composition, c) subjecting the bromopropane-rich composition obtained in step b) to a catalytic reaction to produce a second reaction mixture containing propylene and hydrogen bromide, d) subjecting the second reaction mixture obtained in step c) to at least one separation step to obtain a hydrogen bromide-rich composition and to obtain propylene, and e) subjecting the hydrogen bromide-rich composition obtained in step b) and / or the hydrogen bromide-rich composition obtained in step d) to electrolysis to obtain hydrogen and a bromine-containing composition, wherein preferably at least a portion of the bromine-containing composition is recycled back to step a).

The invention discloses an organic-inorganic hybrid white light fluorescent material taking Cu (I) as a luminescence center, the chemical composition of the material is ACuX3, A represents positive divalent methyl phenyl piperazine cation [C11H18N2] < 2 + >, X is halogen ion Br <-> or I <->; a copper source, hydrogen bromide or hydrogen iodide and 1-phenylpiperazine or 1-phenylpiperazine salt are subjected to solvothermal reaction in methanol to prepare the 1-phenylpiperazine. The excitation wavelength of the material is 290-320 nm, the emission wavelength is 400-650 nm, the material belongs to a fluorescent material for emitting white light, the spectrum half-peak width is about 170 nm, the emission wavelength range is wide, the air stability and the thermal stability are good, the fluorescence performance is excellent, and the material has wide application prospects in the field of white light LEDs. The preparation method of the fluorescent material is easy and convenient to operate, the fluorescent material has good stability, meanwhile, the toxic element lead is replaced with the metal element copper, and harm to the human body and pollution to the environment are reduced.

The present invention provides a preparation method for high-content 2-trifluoromethyl-4-heptafluoroisopropyl aniline. In the presence of dithionous acid, a solvent, and a catalyst, 2-trifluoromethyl aniline and 2-bromoheptafluoropropane undergo a reaction and post-treatment to obtain high-content 2-trifluoromethyl-4-heptafluoroisopropyl aniline, wherein the catalyst is selected from phosphoric acid, pyrophosphoric acid, hypophosphorous acid, metaphosphoric acid, phosphorous acid, pyrophosphorous acid, hydrobromic acid, hydrogen bromide gas, hydrogen chloride gas or sodium bisulfite. The preparation method of the present invention is simple to operate, has mild chemical reaction conditions, achieves a primary reaction conversion content of 96% or above under good reaction conditions, has few post-treatment steps, requires no rectification, achieves a final product content of 98% or above, achieves a total reaction yield of 93% or above, is easy for industrial production, and has good prospects for application.

The invention belongs to the technical field of electrochemical energy storage, and discloses an electrolyte for a zinc-bromine flow battery, a preparation method of the electrolyte and the zinc-bromine flow battery, raw materials of the electrolyte comprise the following components: zinc salt, potassium salt, an additive and a solvent; the potassium salt is a compound mixture of potassium bromide and potassium bromate; the additive comprises an organic complexing agent and an inorganic corrosion inhibitor; wherein the organic complexing agent comprises an organic zinc complexing agent and an organic bromine complexing agent; the organic zinc complexing agent is crown ether; the organic bromine complexing agent is imidazole bromine salt or pyridine bromine salt; the inorganic corrosion inhibitor is a compound of sodium molybdate, zinc sulfate, sodium dihydrogen phosphate and deionized water; growth of zinc dendrites can be remarkably inhibited, the energy density of the battery is improved, and escape of hydrogen bromide is effectively prevented, so that the performance and the stability of the zinc-bromine flow battery are comprehensively improved, the service life of the battery is prolonged, and the use cost and the safety risk of the battery are reduced.

The invention provides a preparation method of high-temperature-resistant polyacrylonitrile-based carbon fiber and application of the high-temperature-resistant polyacrylonitrile-based carbon fiber in fireproof fabric. 2-acrylamido-2-methylpropanesulfonic acid is added, so that the limit oxygen index of the pre-oxidized fiber is increased, and the fireproof performance is enhanced; the coalescence rate of the pre-oxidized fibers is reduced by dipping perfluorolaurinol polyoxyethylene ether and spraying carbon powder; by spraying the basic aluminum chloride, the crimp number of the pre-oxidized fiber is increased, and the flexibility is improved; hydrogen bromide is added into oxygen, so that the oxidation rate and the limit oxygen index are improved; a pre-oxidation reaction is carried out in a radiation heating mode, and formation of a skin-core structure is inhibited; tar-shaped impurities deposited on the surfaces of the pre-oxidized fibers are removed under the action of ultrasonic waves, so that the quality of the carbon fibers is improved; the pre-oxidized fibers are treated through beta-anthraquinone sodium sulfonate, oxygen absorbed by the pre-oxidized fibers is removed, and the tensile strength of the carbon fibers is improved; therefore, the high-temperature-resistant and high-strength carbon fiber is prepared and is applied to a fireproof fabric.

The invention belongs to the technical field of semiconductor materials, and discloses a method for preparing electronic-grade hydrogen bromide from industrial-grade hydrogen bromide, which comprises the following steps: (1) heating an industrial-grade hydrogen bromide raw material with the HBr content of 0.95-0.999 to 18-20.3 DEG C and the pressure of 20-25 kg, and feeding the industrial-grade hydrogen bromide raw material into a dehydrating tower kettle at the flow rate of 10 kg / h; (2) the temperature of the tower kettle of the dehydrating tower is 70-80 DEG C, the pressure in the tower is 20-25 kg, the industrial-grade hydrogen bromide generates rising steam under the action of a tower kettle reboiler, the rising steam is condensed into a liquid phase at the tower top, one part of the liquid phase flows back to the dehydrating tower, and the other part of the liquid phase is extracted from the tower top of the dehydrating tower as a dehydrated product; hydrogen bromide containing concentrated water and heavy components is extracted from the tower kettle; (3) enabling a dehydrated product extracted from the top of the dehydrating tower to enter a middle section of a light component removal tower, discharging non-condensable gas from the top of the light component removal tower, and discharging hydrogen bromide from a tower kettle of the light component removal tower at an average flow rate of 8.5-9.5 kg / h / h; the tower top temperature of the light component removal tower is 15-20 DEG C, and the tower kettle temperature is 19-25 DEG C; (4) hydrogen bromide discharged from the tower kettle of the light component removal tower automatically enters a refining tower through pressure difference, and the temperature of the tower top of the refining tower is 18-22 DEG C; the electronic-grade hydrogen bromide is extracted from the top of the refining tower at the rate of 8kg / h.

The invention discloses a preparation process of 2-bromoheptafluoropropane, which takes heptafluoropropane as a raw material to carry out bromination reaction, specifically, hydrogen on a No.2 carbon atom is substituted by bromine to generate 2-bromoheptafluoropropane, and hydrogen bromide is generated at the same time. And hydrogen bromide is absorbed by water and then is treated by liquid caustic soda to generate sodium bromide.

The invention belongs to the technical field of fine chemical synthesis, belongs to a nonionic short fluorine chain surfactant, and relates to a preparation method of a fluorinated polyether surfactant. The preparation method comprises the following steps: reacting trimethylolethane with a hydrogen bromide acetic acid solution to prepare an intermediate 1; reacting the intermediate 1 in an alkaline environment without an organic solvent to prepare an intermediate 2; reacting the intermediate 2 with pentafluoropropanol under the action of potassium hydroxide and a catalyst 1 to prepare a fluorinated monomer; finally, the fluorinated monomer is subjected to ring opening polymerization under the action of an initiator and a catalyst 2, and the fluorinated polyether type surfactant is prepared. The method has the advantages of easily available raw materials, mild reaction conditions, simple synthesis, low cost, high yield and short fluorine chain of the product, can replace a long-chain fluorine-containing surfactant which is difficult to degrade, and can be used as an additive in the fields of photoresists, coatings, adhesives and the like. The surface tension can be obviously reduced, the surface defects of a coating can be reduced, and the appearance can be improved by adding a very small amount of the surface tension reducing agent.

A method for removing organobromine compound and refining copper from a recycled material containing copper and an organobromine compound includes the steps of: subjecting the recycled material containing the copper and the organobromine compound to low-temperature pyrolysis to recover hydrogen bromide and a crude copper powder; subjecting the hydrogen bromide to a reaction with a metal oxide to form an inorganic compound; subjecting the crude copper powder to a melting treatment to recover a molten mixture containing liquid copper and impurities; and adding a refining agent to the molten mixture to allow the impurities in the molten mixture and the refining agent to form a slag phase layer, followed by removing the slag phase layer, thereby recovering the liquid copper.

The present invention relates to a visible-light-mediated one-step method for preparing phenol and cyclohexanone from cyclohexylbenzene (CHB). The method specifically comprises: under the irradiation of visible light, and with a hydrogen bromide solution as a catalyst and oxygen as an oxidizing agent, directly oxidizing cyclohexylbenzene in an organic solvent to break a carbon-carbon bond, so as to generate phenol and cyclohexanone. The method avoids such a process in a cyclohexylbenzene method in the prior art that cyclohexylbenzene needs to be first oxidized to obtain cyclohexylbenzene-1-hydroperoxide (1-CHBHP), then the mixture of the oxidation reaction products is treated, and then a cyclohexylbenzene peroxide is decomposed in an acidic condition to obtain phenol and cyclohexanone, and also avoids potential risks caused by the accumulation of peroxides. In addition, the method further has a great number of advantages of the operation being simple, reagents being easily available, reaction conditions being mild, easy control being achievable, the reaction being able to be scaled-up, a good selectivity being obtained, etc.

The application discloses a high-purity electronic-grade hydrogen bromide metal ion impurity control device and a control method. The device comprises an adsorption column, a bag-type dust collector and a rectifying tower. First impurity removal mechanisms are arranged at the upper end of the adsorption column and the top of the rectifying tower to remove gas-phase metal impurities. Second impurity removal mechanisms are arranged at the tower kettle of the rectifying tower to remove liquid-phase metal impurities. The bag-type dust collector comprises a flow channel, a keel frame and dust removal bags. Third impurity removal mechanisms are arranged on the flow channel. The dust collector device of metal ions is added to the existing process system, and the structure is designed to realize solid-liquid separation of liquid to intercept metal particles. The structures of the adsorption equipment and the rectifying equipment are designed to remove gas-phase metal impurities and liquid-phase metal impurities, thereby increasing the removal efficiency and effect of metal particles.

The invention belongs to the technical field of medicinal chemistry, and relates to a novel small nucleic acid drug intermediate and a preparation method thereof, the intermediate is a 2 '-FANA-dU phosphoramidite monomer, the preparation method comprises the following steps: 1, reacting a compound a with a 33% hydrogen bromide-acetic acid solution in dichloromethane, and performing post-treatment to obtain a compound b; 2, reacting uracil and the like to generate a white solid, and reacting the white solid with the compound b to obtain a compound c; 3, reacting the compound c in methanol and ammonia water, crystallizing and drying to obtain a compound d; 4, the compound d reacts with 4, 4 '-dimethoxytriphenylchloromethane, and a compound e is obtained through treatment; 5, the compound e reacts with anhydrous diisopropyl imidazole and a 2-cyanoethyl-N, N, N ', N'-tetraisopropyl phosphoramidite reagent, and the 2 '-FANA-dU phosphoramidite monomer is obtained.The 2'-FANA-dU phosphoramidite monomer prepared through the method can modify siRNA, the biological activity of the siRNA can be reserved or even enhanced, and the biological stability of the siRNA can be remarkably improved.

The present invention provides a method for preparing 3,4-difluorobromobenzene, belonging to the technical field of fine chemical industry. Using 1,2-difluorobenzene as the raw material and solvent, and silica gel supported Lewis acid as the catalyst, bromine is added dropwise while heating up to obtain part of 3,4-difluorobromobenzene. Meanwhile, the generated hydrogen bromide is converted into bromine by an oxidant and continues to be added dropwise, and the product is obtained by rectification to get 3,4-difluorobromobenzene. The present invention uses a catalyst to reduce the generation of isomers; by setting the first / second reaction kettle, the inactivation of the catalyst is avoided, and at the same time, the bromine utilization rate is improved; by selecting an oxidant, the oxidation efficiency is improved, the storage risk is reduced, and the possibility of product pollution is reduced. The bromine utilization rate of the present invention can reach 92%, the product purity can reach 99.7%, and the yield can reach 85.5%.

The invention discloses a method for preparing pyridine hydrobromide using pyridine hydrochloride mother liquor, belongs to the technical field of pyridine hydrochloride, and is characterized in that it comprises the following steps: adding purified water to pyridine hydrochloride mother liquor, stirring and standing the mixed solution to be layered, and obtaining a lower layer solution; adding calcium hydroxide solution to the lower layer solution, adjusting the pH to neutral, and adding a phase transfer aid to saturation, stirring and standing the mixed solution to be layered, and obtaining an upper layer of recovered pyridine solution; passing hydrogen bromide gas into the recovered pyridine solution, and collecting the reaction solution; the reaction solution is decolorized, concentrated, cooled, crystallized and dried to obtain pyridine hydrobromide. The beneficial effects of the invention are: the mother liquor produced in the production process of pyridine hydrochloride, creatively introduces a phase transfer aid as calcium chloride, and the overall recovery rate of pyridine is increased from 50% to 90%.

This utility model belongs to the technical field of hydrogen bromide gas drying towers, specifically a hydrogen bromide gas drying tower with replaceable packing, including a drying tower body, a protective net, and an installation mechanism. The protective net is installed on the outer wall of the drying tower body. The installation mechanism includes an installation shell, filter plates, and a fixing shell. The installation shell is located inside the drying tower body; an installation groove is formed on the inner wall of the installation shell; the filter plates are respectively installed inside the corresponding installation grooves; and the fixing shell is located inside the installation shell. This utility model places the fixing shell inside the installation shell, and then installs the filter plates into the corresponding installation grooves. A partition plate can divide the interior of the installation shell into multiple independent spaces for replacing and classifying different types of packing.

The present invention relates to the field of production wastewater oxidation recovery, and specifically to a production wastewater oxidation recovery device, comprising an evaporation box, an evaporation assembly being provided in the evaporation box, and a condensation assembly being provided at an upper port of the evaporation box; the evaporation assembly comprising a rotating shaft horizontally arranged across the evaporation box, a wheel body being coaxially fixedly connected to the middle position of the rotating shaft, and a plurality of arc-shaped evaporation plates being provided on the surface of the wheel body; in the present invention, the wheel body is designed to stir hydrogen bromide wastewater and an oxidant, hydrogen peroxide, continuously during rotation, thereby ensuring full contact between the oxidant and the wastewater and improving the oxidation reaction efficiency of the hydrogen bromide and hydrogen peroxide; and simultaneously, as the wheel body continuously rotates, each evaporation plate can be continuously rotated out of the mixed liquid. After being carried out, the evaporation plate can quickly heat and evaporate the elemental bromine solution on the evaporation plate, thereby significantly improving the evaporation effect.

The invention relates to the technical field of preparation of fluorine-containing organic intermediates, in particular to a method for preparing 2-bromoheptafluoropropane through photothermal conversion. The method comprises the following steps: respectively vaporizing, mixing and preheating heptafluoropropane and bromine, introducing into a photo-thermal reactor, carrying out bromination reaction to obtain mixed gas containing 2-bromoheptafluoropropane, introducing the mixed gas containing 2-bromoheptafluoropropane into a fluorine removal device containing silicon dioxide, carrying out fluorine removal reaction, washing with water, carrying out alkali washing, dehydrating, compressing, condensing, carrying out two-stage rectification, and drying to obtain 2-bromoheptafluoropropane. The high-purity 2-bromoheptafluoropropane is obtained. According to the method, hydrogen fluoride is removed from the mixed gas containing 2-bromoheptafluoropropane through a fluorine removal reaction, hydrogen bromide is removed through water washing, alkali washing and dehydration, impurities are removed through secondary rectification, finally, the high-purity 2-bromoheptafluoropropane product is obtained through drying and dehydration, and the purity of the product is up to 99.91-99.98%.

The application belongs to the technical field of fine chemical industry, and particularly relates to a hydrogen bromide purification method for removing bromine, water and impurities before liquefaction, which comprises the following steps: S1, removal of free bromine: hydrogen bromide gas is introduced into a first bromine removal tank filled with a red phosphorus filler layer; S2, preliminary removal of water: the gas treated in S1 is introduced into a first drying tank filled with liquid phosphorus tribromide; S3, deep removal of trace water: the gas treated in S2 is introduced into a second drying tank filled with resin or mordenite; and S4, separation of mechanical impurities: the gas treated in S3 is introduced into a cyclone separator. By adopting the red phosphorus filler layer and controlling the loading amount, particle size and loading density of the red phosphorus, the free bromine in the hydrogen bromide gas can be efficiently removed, liquid phosphorus tribromide is used as a drying medium and is supplemented in real time to maintain the mass concentration of the phosphorus tribromide, so that the bromine and water content in the gas can be effectively reduced, and high-quality gas is provided for subsequent deep drying and impurity separation.

To provide a hydrogen bromide addition agent that can be produced safely on an industrial scale, is very stable against oxygen and light, and facilitates its handling and storage.SOLUTION: The present invention provides a bromine-containing complex composed of a polar solvent and hydrogen bromide, where the polar solvent is an amide-based aprotic polar solvent, and a hydrogen bromide addition agent including the same, a method for producing a bromine-containing complex and a method for producing a bromine-containing compound using the same.SELECTED DRAWING: None

The application provides a synthesis method of 6-bromo-2-chloro-3-nitropyridine and relates to the technical field of organic synthesis. 2-amino-3-nitro-6-chloropyridine is reacted with a hydrobromic acid acetic acid solution to obtain 2-amino-3-nitro-6-bromopyridine, which is diazotized to obtain 6-bromo-2-hydroxy-3-nitropyridine, and then the 6-bromo-2-hydroxy-3-nitropyridine is reacted with a chlorinating reagent to obtain 6-bromo-2-chloro-3-nitropyridine. The synthesis method of 6-bromo-2-chloro-3-nitropyridine has the advantages of easy availability of raw materials, low price, mild reaction condition, simple process, high economic benefit, suitability for large-scale production, and the like, can solve the current situation of high price of 6-bromo-2-chloro-3-nitropyridine, and can play a positive role in the promotion of downstream products of 6-bromo-2-chloro-3-nitropyridine.

The present invention discloses a method for determining chloride ions in electronic grade hydrogen bromide by ion chromatography, comprising the following steps: (1) preparing and analyzing Cl ‑ Standard solution, obtain the working curve of concentration and peak area; (2) Pretreatment of hydrogen bromide sample: connect three washing bottles in series on the hydrogen bromide sampling tube, the first one is a buffer bottle, the second and third ones are absorption bottles filled with 100mL high-purity water, after absorption, combine the obtained hydrogen bromide absorption solution; (3) add alkali solution to adjust the pH value of hydrogen bromide solution to 4-10, and make up the volume with a volumetric flask to prepare the solution to be tested; (4) use ion chromatograph to detect the solution to be tested and obtain the trace amount of Cl in electronic grade hydrogen bromide ‑ The chromatogram of the test was obtained, and the Cl in the test solution was detected according to the external standard method. ‑ Quantitatively obtain Cl in electronic grade hydrogen bromide ‑ The method is simple to operate, has good reproducibility and high sensitivity.

The invention provides a preparation method of alkoxy bromoethane, which comprises the following steps: with alkoxy ethanol and phosphorus tribromide as raw materials, carrying out reaction in the presence of a catalyst and a solvent or without the solvent, and carrying out after-treatment to prepare the alkoxy bromoethane, the catalyst being selected from triethylamine, tripropylamine or pyridine. The preparation method disclosed by the invention is simple in process operation, can realize the total yield of 68-78% and the content of the obtained final product of 98% or above under optimal conditions, does not need special rectification for post-treatment of the product, has the advantages of high yield, low cost and easiness in industrial production, does not need hydrogen bromide gas, does not discharge high-concentration waste liquid and waste gas, is environment-friendly and more friendly, and is suitable for industrial production. And the method has a very high application prospect. # imgabs0 #

The utility model relates to the technical field of hydrogen bromide purification, and discloses an electronic-grade hydrogen bromide purification device which comprises a settling tank, a rotary feeding mechanism is arranged on the settling tank, and a waste gas discharge mechanism is arranged at the top of the settling tank; the rotary feeding mechanism comprises a supporting seat, the supporting seat is fixedly mounted at the top of the settling tank, a fixed pipeline is fixedly mounted on the inner wall of the supporting seat, and a first valve pipe is fixedly connected to the top of the fixed pipeline. Through the overall design of a rotary introduction mechanism, ozone can be introduced from a first valve pipe, the ozone can penetrate through a rotary pipeline to be output from the end of a branch pipeline, meanwhile, through work of a driving motor, the rotary pipeline can be driven to rotate integrally, so that the ozone is rotationally introduced into a stock solution, and meanwhile, a stirring paddle can be driven to rotate; the stirring paddle can stir the stock solution, so that the contact effect of the stock solution and the ozone is further improved, the utilization rate of the ozone is improved, and the consumption of the ozone is reduced.

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.

The invention discloses low-defect few-layer graphene water-based conductive paste and a preparation method and application thereof, and belongs to the technical field of conductive paste. The low-defect few-layer graphene water-based conductive paste comprises the following components in parts by weight: 1-3 parts by mass of low-defect few-layer graphene, 100 parts by mass of ultrapure water and 0.8-1.2 parts by mass of a conductive additive, the low-defect few-layer graphene is obtained by performing room-temperature intercalation on graphite powder, performing chemical expansion and performing water-phase stripping by adopting an aqueous solution of 5 '-adenine nucleotide salt, the conductive additive is amphiphilic polythiophene; the amphiphilic polythiophene is obtained by polymerizing 2, 5-dibromo-3-triethylene glycol monomethyl ether thiophene and 3-[10-(4-toluene ether) decyl] thiophene which are used as monomers and then treating by hydrogen bromide and anhydrous acetic anhydride; the low-defect few-layer graphene water-based conductive paste prepared by the invention has few graphene defects, good dispersity and excellent conductivity.

The invention belongs to the technical field of organosilicon compounds, and particularly relates to a method for preparing 4-trimethoxysilyl styrene and application of the 4-trimethoxysilyl styrene. The preparation method comprises the following steps: taking 4-iodobenzene ethane and trimethoxysilane as raw materials, and carrying out a coupling reaction to synthesize 4-trimethoxysilyl phenyl ethane; the preparation method comprises the following steps: reacting 4-trimethoxysilyl phenyl ethane with NBS (N-bromosuccinimide), and synthesizing 4-trimethoxysilyl phenyl bromoethane through a free radical bromination reaction; and carrying out hydrogen bromide removal on the 4-trimethoxysilyl phenyl bromoethane, so as to prepare the 4-trimethoxysilyl styrene. According to the application, (1) the 4-trimethoxysilyl styrene is used as a modifier, and (2) the 4-trimethoxysilyl styrene is applied to preparation of a resin compound; and (3) the 4-trimethoxysilyl styrene can improve the adhesive force between the heat-resistant resin and the substrate. According to the invention, the 4-trimethoxysilyl styrene is successfully prepared through different inventive concepts and new routes, so that more possibilities for synthesizing the compound are given, and the yield is also improved.

The application discloses a high-temperature-resistant metalized capacitor film and a preparation method thereof, and belongs to the technical field of thin film or thick film capacitors. The application provides a novel method for preparing a metalized capacitor film, which comprises the following steps: taking 4-vinylbenzocyclobutene as raw material, and combining the raw material with hydrogen bromide after an addition reaction to obtain a substitution product; combining 2-methoxy-4-vinylphenol with the substitution product after demethylation to obtain a polymerization monomer containing a double bond and a cycloalkane structure; polymerizing the polymerization monomer with decafluorobiphenyl and 4-allylphenol to obtain a base film; and plating a metal layer on the base film to obtain the high-temperature-resistant metalized capacitor film. The application has good thermal stability, and solves the technical problem that a thermoplastic base film is deformed or decomposed at high temperature, and is difficult to meet the use requirement.