74 results about "Ammonium perchlorate" patented technology

The present invention discloses a copper-containing hydrogen-bond organic framework material, a preparation method, and an application thereof. The method comprises the following steps: mixing trimesic acid, melamine, and a copper salt and dispersing them in a solvent to obtain a mixed suspension; transferring the mixed suspension to a reactor for reaction to obtain a copper-containing hydrogen-bond organic framework material solution; cooling the copper-containing hydrogen-bond organic framework material solution, centrifuging it, and then post-treating the copper-containing hydrogen-bond organic framework material solid obtained by centrifugation to obtain a copper-containing hydrogen-bond organic framework material with a one-dimensional rod-shaped structure. When used in the thermal decomposition catalysis of ammonium perchlorate, the copper-containing hydrogen-bond organic framework material prepared by the present invention can exhibit high catalytic activity and stability, thereby concentrating the exothermic temperature range and heat release of ammonium perchlorate.

The invention provides an energetic complex K-BTE and a continuous preparation method and application thereof.The continuous preparation method comprises the steps that 1, 2-bis (tetrazole-5-yl) ethane serves as an initial raw material, a ligand solution and a metal ion salt solution are continuously injected into a continuous flow reaction unit through an injection pump, and energetic complex crystals are obtained through filtering, washing and drying; a novel energetic complex preparation method which is simple and continuous in process and mild in reaction condition is developed, the energetic complex K-BTE which is novel in structure and excellent in comprehensive performance is prepared for the first time, and the energetic complex K-BTE has the characteristic of high thermal stability and also has the advantages of being simple and efficient in process method and safe and controllable in process; the thermal decomposition temperature of K-BTE reaches up to 366.5 DEG C, the actually measured impact sensitivity is greater than 40J, the friction sensitivity is between 240N and 360N, and meanwhile, the thermal decomposition of ammonium perchlorate is catalyzed. Due to the excellent performance of the K-BTE, the K-BTE has huge application potential in the field of catalyzing the combustion efficiency of solid propellants as an energetic complex.

The invention relates to the technical field of new energy and mining and blasting, in particular to a preparation method of a biomass instantaneous cracking agent. The preparation method comprises the following steps: mixing biomass powder, pulverized coal, an oxidant, a catalyst and a release agent to obtain mixed powder; mixing the adhesive, the water and the preservative to prepare a glue solution; the glue solution and the mixed powder are kneaded, granulated and dried, and the biomass instantaneous cracking agent is obtained, the biomass powder accounts for 4-55 parts by mass, the pulverized coal accounts for 0-48 parts by mass, the oxidizing agent accounts for 0-45 parts by mass, the catalyst accounts for 0-20 parts by mass, the release agent accounts for 0-2.5 parts by mass, the adhesive accounts for 2-10 parts by mass, the preservative accounts for 0-0.15 part by mass, and the oxidizing agent and the catalyst are not 0 at the same time; the oxidizing agent is potassium peraluminate powder and / or ammonium perchlorate powder; the catalyst is potassium nitrate powder and / or sodium nitrate powder. The biomass instantaneous cracking agent prepared by the invention solves the problems of long stone cracking time, low efficiency and environmental pollution of the existing stone cracking agent.

The invention belongs to the technical field of ammonium perchlorate modification, and particularly relates to a low-sensitivity ammonium perchlorate composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: (1) mixing diethanol amine and an insensitive material to obtain a coating material; (2) adding a part of ammonium perchlorate into a stirrer according to a sandwich type feeding method, spreading the bottom of the stirrer, adding a coating material, finally adding the rest ammonium perchlorate, lifting a stirrer material cylinder, and starting a stirring reaction when the bottom of a stirring paddle is about to touch the material; and (3) after the reaction is finished, stirring and cooling the reaction system to obtain the ammonium perchlorate composite material with low friction sensitivity and impact sensitivity. The process provided by the invention is suitable for preparing low-sensitivity ammonium perchlorate with various particle sizes, has the advantages of simple process flow, good reproducibility, easiness in amplification and almost no pollution to the environment, and does not influence the performance of ammonium perchlorate while reducing the sensitivity of ammonium perchlorate.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

The present application belongs to the technical field of packaging, and relates to a ton bag packaging machine and application thereof in the production of ammonium perchlorate. The packaging machine comprises a mounting plate, a moving plate and a supporting assembly; the mounting plate is fixed at the top end of a supporting rod; the moving plate is installed below the mounting plate, and a filling assembly is installed on the moving plate; a plurality of extension plates are fixedly installed on the moving plate, and each extension plate is provided with the supporting assembly. The supporting assembly comprises a first clamping piece and a second clamping piece; the first clamping piece comprises two first clamping plates, and the second clamping piece comprises two second clamping pieces; each second clamping piece comprises two second clamping plates which are parallel to each other. When the lifting belt is broken, the first clamping piece and the second clamping piece clamp the lifting belt under the action of the first transmission member and the second transmission member, and the two broken lifting belts are clamped and fixed. This is favorable for keeping the ton bag stable, thereby keeping the subsequent filling quality, and avoiding the inclination of the ton bag in the subsequent filling process.

The application discloses a rapid evaporation salt collecting device for ammonium perchlorate mother liquor and relates to the technical field of evaporation salt collecting devices. The device comprises an operation table, the upper surface of the operation table is fixedly connected with an inner barrel, the outer part of the inner barrel is fixedly connected with an outer barrel, a heating cavity is formed between the inner barrel and the outer barrel, a coil pipe is arranged in the heating cavity, the coil pipe is fixedly connected to the outer wall of the inner barrel, the top end of the coil pipe is in communication with the heating cavity, a rotary pipe is arranged in the bottom of the inner barrel, a rotary joint is in communication with the bottom of the rotary pipe, a connecting pipe is in communication with the bottom of the rotary joint, and the end, which is away from the rotary joint, of the connecting pipe is in communication with the coil pipe. The rapid evaporation salt collecting device for ammonium perchlorate mother liquor drives the stirring blade to rotate through the sliding sleeve, the stirring blade stirs the ammonium perchlorate mother liquor, the temperature of the ammonium perchlorate mother liquor at all positions in the inner barrel is basically uniform, the phenomenon that the mother liquor is unevenly heated is avoided, the evaporation time is shortened, and the evaporation efficiency is improved.

The utility model discloses tetrabutylammonium perchlorate purification equipment and belongs to the technical field of chemical purification equipment. The tetrabutylammonium perchlorate purification equipment comprises a pretreatment unit, a chemical reactor, a crystallizer, filtering separation equipment, an adsorption device and a control system, the pretreatment unit comprises a multi-stage filtering system, a raw material feeding metering pump and an automatic acid-base adding valve; the chemical reactor adopts a tubular reactor and is provided with an inlet and an outlet, and a heat exchange device is arranged outside the tubular reactor; the rectifying tower adopts a packed tower and is provided with a packing layer and a liquid distributor; the crystallizer comprises a crystallization tank, a jacket is arranged on the wall of the crystallization tank, and a stirrer, an elutriation column and a temperature control system are arranged in the crystallization tank; the filtering and separating equipment is provided with a filtering medium and adopts a rotary vacuum filter; the adsorption device is provided with a sensor array, the adsorption efficiency and the saturation degree of an adsorption material can be monitored in real time, and regeneration or program replacement can be automatically triggered through a control system.

The application discloses an anti-migration ferrocenyl hyperbranched polymer burning rate catalyst, a preparation method thereof and application thereof. The ferrocenyl hyperbranched polymer is prepared by one-pot method through amidation reaction with 1,1'-ferrocene dicarboxylic acid and tri(2-aminoethyl)amine as monomers. The ferrocenyl hyperbranched polymer has high anti-migration performance in a composite solid propellant and can reduce the thermal decomposition temperature of ammonium perchlorate.

The utility model discloses a quantitative sorting device for ammonium perchlorate, which relates to the field of perchloric acid production and comprises a support frame, an octagonal chassis is fixed at the top end of the support frame, a rotating shaft is rotatably connected to the middle of the top end of the octagonal chassis, a motor is fixed inside the support frame, and a driving shaft of the motor is connected with the rotating shaft. A top cover is arranged at the top end of the rotating shaft, after the motor is started, the top cover and the discharging barrel can be driven to rotate, materials can be conveyed into the triangular hoppers through the discharging barrel, after one triangular hopper is full of materials, the materials can be conveyed to the next triangular hopper through rotation of the discharging barrel, the capacity of each triangular hopper is consistent, and the discharging barrel is arranged in the discharging barrel. According to the quantitative sorting device, the purpose of quantitative sorting can be achieved, each triangular hopper can be taken out independently, materials in a certain triangular hopper can be taken and used conveniently, and the materials are evenly divided into eight parts.

The present invention provides an iron-based MOF and induced titanium dioxide composite catalyst, a preparation method and an application, including: Step 1, loading TiO2 on the surface of a MOF(Fe) carrier to form a MOF(Fe)@TiO2 composite catalyst. Step 2, loading TiO2 on the surface of a Fe2O3-HT carrier to form a Fe2O3-HT@TiO2 composite catalyst. Step 3, subjecting the MOF(Fe)@TiO2 prepared in Step 2 to high-temperature calcination and annealing under atmosphere protection to obtain a Fe2O3@TiO2-HT composite catalyst. The composite catalyst is used as a catalyst for the thermal decomposition of ammonium perchlorate. The present invention explores the application of MOF(Fe) and Fe2O3 materials in the catalytic thermal decomposition reaction of AP and obtains good catalytic performance. Compared with the traditional TiO2 (P25) catalyst, the high-temperature decomposition peak temperature for catalyzing the thermal decomposition of AP is significantly advanced.

The utility model discloses a quantitative feeding device for ammonium perchlorate production, which relates to the field of feeding devices and comprises a weighing protection hopper, a blanking hopper is arranged at the bottom of the weighing protection hopper, a supporting protection frame is rotatably mounted on the inner wall of the weighing protection hopper, a rotating motor is arranged in the weighing protection hopper, and a feeding hopper is arranged on the lower portion of the weighing protection hopper. An output shaft of the rotating motor is fixedly connected with a rotating shaft of the supporting and protecting frame, and an electronic scale is arranged on the supporting and protecting frame. A material scraping plate is arranged above the supporting protection frame, the lower surface of the material scraping plate is movably attached to the upper surface of the electronic scale, supporting sliding blocks are fixedly installed at the two ends of the lower surface of the material scraping plate, and the two supporting sliding blocks are slidably connected with the two sides of the supporting protection frame correspondingly; according to the feeding device, ammonium perchlorate on the electronic scale can be scraped off, the discharging efficiency is high, ammonium perchlorate adhered to the scraping plate can be shaken off, ammonium perchlorate residues can be avoided, and the feeding accuracy is high.

The invention relates to the technical field of ammonium perchlorate production, in particular to a high-capacity production device capable of automatically turning over and pouring materials through a tool. The device comprises a material pouring mechanism rack and a material pouring hopper rack which are fixed on the ground, the material pouring mechanism rack is provided with a material guide hopper and fork teeth which are driven by a speed reducing motor through a rotating shaft, a shell is fixed on the material pouring hopper rack, and a dust suction port, a gate valve and an observation window are arranged on the shell. The speed reducing motor is controlled by the electric control system to automatically execute a turning and pouring procedure, so that the traditional manual operation is completely replaced, and the problems of high labor intensity, high safety risk, serious dust pollution, difficulty in product quality control and the like in the prior art are effectively solved. Automation, staff reduction and efficiency improvement in the production process are achieved; the intrinsic safety level is obviously improved through human and material isolation and anti-explosion design; and the screening and adjustable discharging functions are integrated, and the uniformity and stability of the product granularity are guaranteed.

The invention provides an energetic complex Cs-BTE and a continuous preparation method and application thereof.The continuous preparation method comprises the steps that 1, 2-bis (tetrazole-5-yl) ethane serves as an initial raw material, a ligand solution and a metal ion salt solution are continuously injected into a continuous flow reaction unit through an injection pump, and energetic complex crystals are obtained through filtering, washing and drying; a novel energetic complex preparation method which is simple and continuous in process and mild in reaction condition is developed, the energetic complex Cs-BTE which is novel in structure and excellent in comprehensive performance is prepared for the first time, and the energetic complex Cs-BTE has the characteristic of high thermal stability and also has the advantages of being simple and efficient in process method and safe and controllable in process; the thermal decomposition temperature of Cs-BTE is as high as 375.5 DEG C, the actually measured impact sensitivity is greater than 40J, the friction sensitivity is greater than 360N, and meanwhile, the C-BTE has a catalytic effect on thermal decomposition of ammonium perchlorate. Due to the excellent performance of the Cs-BTE, the Cs-BTE has huge application potential in the field of catalyzing the combustion efficiency of solid propellants as an energetic complex.

The application discloses a molecular imprinting polymer electrocatalytic polar plate and a preparation method and application thereof, and the preparation method comprises the following steps: cleaning an electrode plate; stirring a benzene[1,2-B:4,5-B']dithiophene-4,8-dione, 3-boronic acid thiophene, azithromycin, 3,3'-bithiophene and tetrabutylammonium perchlorate acetonitrile solution to obtain a polymerization solution; taking a graphite plate as a working electrode and a counter electrode, and taking a non-aqueous Ag + The electrode is a reference electrode, the electro-polymerization is completed in the polymerization solution, and a MIP (PBth-BQ) molecular imprinting catalytic electrode is obtained; the MIP (PBth-BQ) molecular imprinting catalytic electrode is taken as a working electrode, the graphite sheet is taken as a counter electrode, saturated mercury is taken as a reference electrode, constant-temperature water bath stirring is carried out, the template is removed, and cleaning is carried out. The electrocatalytic polar plate has holes on the surface, the azithromycin is wrapped first and then removed, the adsorption effect is better, the selectivity is high, the adsorption and electrocatalysis are synergistically combined, and the removal effect is good.

The invention discloses an anti-moisture-absorption potassium nitrate material as well as a preparation method and application thereof, and belongs to the technical field of solid propellant materials. The preparation method of the anti-moisture absorption potassium nitrate material comprises the following steps: mixing potassium nitrate with a dispersion liquid, and then mixing with a binder solution; wherein the dispersion liquid is obtained by dispersing a shell material in an anti-solvent of potassium nitrate; the binder solution is obtained by dissolving a binder in a good solvent of potassium nitrate. The preparation method is easy to implement and industrialize, the product is stable, the shell layer is complete and high in strength, the phenomenon of strong moisture absorption during blending of potassium nitrate and ammonium perchlorate (AP) in a solid propellant system can be effectively solved, a remarkable moisture absorption prevention effect is achieved, and the method can be popularized to solve the problem of hygroscopicity deterioration of other mixed moisture absorption materials.

The invention belongs to the technical field of packaging, and relates to a ton bag packaging machine and application of the ton bag packaging machine to ammonium perchlorate production. The packaging machine comprises a mounting plate, a moving plate and a supporting assembly. The mounting plate is fixed at the top end of the supporting rod; the moving plate is mounted below the mounting plate, and a filling assembly is mounted on the moving plate; a plurality of extension plates are fixedly installed on the movable plate, and a supporting assembly is installed on each extension plate. The supporting assembly comprises a first clamping piece and a second clamping piece. The first clamping piece comprises two first clamping plates, the number of the second clamping pieces is two, and each second clamping piece comprises two second clamping plates which are parallel to each other. When the hanging belt is broken, under the action of the first transmission part and the second transmission part, the first clamping part and the second clamping part clamp the hanging belt, and the two broken hanging belt sections are clamped and fixed. The ton bag can be kept stable, so that the follow-up filling quality is kept, and the ton bag is prevented from inclining again in the follow-up filling process.

The invention provides a static electricity generation equivalent simulation and measurement device for an ammonium perchlorate particle pipeline conveying process. In the device, particles enter the pipeline under the action of negative pressure, and in the process of moving in the pipeline, the particles collide with and rub against the inner wall of the pipeline and accumulate electrostatic charges. In the movement process, the high-speed camera records the particle movement condition in real time through the transparent observation section, image processing software is matched to track the particle track, parameters such as the density, the speed and the position of the particles are exported, and the dryer and the temperature and humidity monitor monitor and control the temperature and the humidity in the pipeline. Moving particles are collected into the Faraday cylinder by the branch pipe, and the charge-to-mass ratio of the particles at the position within the measurement time is obtained by combining a high-speed picoammeter and a computer. By changing the positions and the number of the branch pipes and replacing the pipeline paths, the particle electrostatic generation characteristics under different pipeline conditions are finally revealed.

The utility model discloses a movable quantitative feeding device for ammonium perchlorate production, which relates to the field of ammonium perchlorate production, and comprises a support frame, two quantitative cylinders are fixed on one side of the support frame, bottom plates are hinged to the bottom ends of the two quantitative cylinders, a fixed frame is arranged above the two quantitative cylinders, a sliding plate is movably arranged in the fixed frame, and the sliding plate is fixed on the fixed frame. A filling barrel is fixed to the top end of the sliding plate, a through opening corresponding to the bottom end of the filling barrel is formed in the sliding plate, when the sliding plate leaves the first quantitative barrel, the bottom plate is separated from the shovel plate, powder in the quantitative barrels automatically descends, and the feeding work of one quantitative barrel volume is completed; the hitting balls fixed to the ends of the springs can hit and collide with the outer side of the quantitative barrel in the feeding process, vibration generated can accelerate falling of ammonium perchlorate powder attached to the inner wall of the quantitative barrel, and the situation that the ammonium perchlorate powder is left in the quantitative barrel and influences the feeding accuracy is avoided.

This invention discloses an NPTTz-based anionic energetic complex, prepared by a volatilization method using 6-(4-nitro-1H-pyrazole-1-yl)-[1,2,4]triazolo[4,3-b][1,2,4,5]tetraazine and metal nitrates as raw materials. The NPTTz-based anionic energetic complex of this invention exhibits a detonation response upon laser irradiation, demonstrating good safety and detonation performance. It can be used as a laser-initiated detonator or as a component of explosives and propellants. Furthermore, the NPTTz-based anionic energetic complex of this invention exhibits good catalytic activity and can be used as an ammonium perchlorate catalyst, showing promising application prospects in the field of high-energy insensitive energetic materials.

The invention provides an assembly preparation method of an aluminum-based composite energetic material, which comprises the following steps: step 1, under a stirring condition, controlling the mixing reaction temperature, adding an ammonium perchlorate-triethylene diamine aqueous solution into a nano-aluminum-graphene oxide assembly dispersion liquid, stirring for reaction, and obtaining a precursor assembly dispersion liquid after the reaction; 2, under the mixing reaction temperature and stirring condition, perchloric acid is dropwise added into the precursor assembly dispersion liquid prepared in the step 1, and a reaction is conducted after dropwise adding is completed; and after the reaction is completed, carrying out post-treatment to obtain the aluminum-based composite energetic material. According to the method, the energetic material DAP-4 synthesis mother liquor is used as an in-situ synthesis system, compounding of energetic components and fuel components can be achieved, meanwhile, core-shell coating and embedding of nano Al by DAP-4 are achieved through the self-assembly and induction effects of graphene oxide, interface contact between reaction components can be increased, and the reaction efficiency is improved. And nano Al can be effectively isolated from contact with space oxygen and water molecules, and activity reduction caused by further oxidation is prevented.

This invention provides an energetic complex Cs-BTE, its continuous preparation method, and its applications. Starting with 1,2-bis(tetraazol-5-yl)ethane, a ligand solution and a metal ion salt solution are continuously injected into a continuous flow reaction unit via a syringe pump. After filtration, washing, and drying, energetic complex crystals are obtained. This invention develops a novel, simple, continuous, and mild method for preparing energetic complexes. For the first time, an energetic complex Cs-BTE with a novel structure and excellent overall performance was prepared. In addition to high thermal stability, Cs-BTE also possesses the advantages of a simple, efficient, safe, and controllable process. The thermal decomposition temperature of Cs-BTE reaches 375.5℃, with a measured impact sensitivity greater than 40 J and a friction sensitivity greater than 360 N. It also exhibits a catalytic effect on the thermal decomposition of ammonium perchlorate. The superior performance of Cs-BTE makes it a promising energetic complex for catalyzing the combustion efficiency of solid propellants.

The present invention belongs to the technical field of manipulators and relates to a manipulator and its application in the packaging of ammonium perchlorate. The present invention includes an electric slide rail, a slide plate and a grasping mechanism; two clamping arms are slidably arranged on the electric slide rail, a slide plate is slidably arranged on each clamping arm, and a grasping mechanism is slidably arranged on each slide plate through a chute; the grasping mechanism includes a plurality of support units rotatably connected in sequence; both ends of the grasping mechanism are arranged on both sides of the slide plate, and one end of the grasping mechanism is fixedly connected to the clamping arm. By moving the slide plate on the clamping arm, the number of support units on the inner side of the slide plate is adjusted, so that the number of support units on the inner side of the slide plate adapts to the size of the packaging bag, which not only ensures stable grasping but also helps to improve the palletizing quality. In a narrow space, by moving the slide plate closer to the electric slide rail, and at the same time the support units on the inner side of the slide plate gradually move to the outer side of the slide plate, the grasping mechanism is gradually separated from the packaging bag, effectively improving the applicability of the present invention.

This invention provides a boron-based composite energetic material with sodium molybdate assembled with an oxidant and its preparation method. The material includes a boron matrix, an energetic oxidant assembled on the boron matrix, and sodium molybdate dispersed within the energetic oxidant. The boron matrix is ​​boron powder, mono-modified boron powder, or binary modified boron powder. The energetic oxidant is ammonium perchlorate, ammonium nitrate, or potassium perchlorate. The morphology of the boron-based composite energetic material is rough-surfaced spherical particles. The ignition delay time of the boron-based composite energetic material with sodium molybdate assembled with an oxidant prepared by spray drying is 37-30 ms, which is half that of boron powder or surface-modified boron powder; the oxidation peak temperature of this composite energetic material is 560-533℃, which is more than 100℃ lower than that of boron powder or surface-modified boron powder.

The invention discloses a preparation method and application of fluorine-doped cuprous oxide with thermal stable oxygen vacancies. According to the structure, oxygen vacancies are regulated and controlled through fluorine doping, so that the structure is kept stable at the temperature of 300 DEG C or above, and the catalytic performance is remarkably enhanced. The molar ratio of a copper source to a fluorine source is (1-5): 1. The preparation method comprises the following steps: dissolving a copper source and a fluorine source in ethylene glycol, mixing, adjusting the pH value to 4-5, carrying out hydrothermal reaction for 12-24 hours, washing and drying to obtain a product. When the concentration of the copper solution is 0.2-0.5 mol / L, the copper solution is uniformly doped through 20-40 kHz ultrasonic treatment; and the molar ratio of the ascorbic acid to the copper source is 1: (1-10) to optimize the formation of oxygen vacancies. The material serving as a catalyst is suitable for high-temperature catalytic reactions such as fuel combustion and ammonium perchlorate decomposition, has high-temperature stability and efficient activity, and can be applied to the fields of energy, chemical engineering and propellants. The process is simple and convenient, the cost is low, and a new scheme is provided for high-temperature catalytic material design.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing a bridged ring derivative through [4 + 2] cycloaddition based on an electrochemical means. The method for synthesizing the bridged ring derivative based on the electrochemical means [4 + 2] cycloaddition comprises the following steps: by taking an anethole derivative 1 and a cyclopentadiene derivative 2 as raw materials, tetrabutylammonium hexafluorophosphate or tetrabutylammonium perchlorate as an electrolyte and an acetonitrile solution as a solvent, carrying out electrolysis in an electrolytic tank at constant current density, and purifying to obtain a bridged ring derivative 3. According to the method, the free radical cation intermediate is generated through anodic oxidation by utilizing constant-current electrolysis under the conditions of no metal and no oxidant, the cycloaddition reaction is realized, the reaction condition is mild, the reaction time is short, the yield is 51-81%, the stereoselectivity is good, and the method is suitable for complex molecule synthesis.

The invention discloses a trinuclear ferrocene-based metal composite material and a preparation method and application thereof, and belongs to the field of burning rate catalysts.The preparation method comprises the steps that ferrocenyl acetaldehyde and ferrocenyl dihydrazone are dissolved, then heating reflux is conducted, purification treatment is conducted, a trinuclear ferrocene ligand is prepared, the trinuclear ferrocene ligand is dissolved in a solvent, a mixed solution A is prepared, and the mixed solution B is prepared; dividing the mixed solution A into three equal parts, and respectively adding a Co salt solution, a Fe salt solution and a mixed solution of Co salt and Fe salt to respectively prepare the trinuclear ferrocene-based metal composite materials of Fc3N4 / Co, Fc3N4 / Fe and Fc3N4 / CoFe. The technical problem that a burning rate catalyst prepared by an existing preparation method is not high in pyrolysis catalytic performance on ammonium perchlorate is solved.

The application discloses a method for reducing the sensitivity of ammonium perchlorate by adopting a polydopamine / fluorine-containing silane composite coating, and comprises the following steps: (1) dispersing ammonium perchlorate in an organic solvent, stirring to obtain a milky white suspension; (2) adding a catalyst dropwise into the suspension, stirring, uniformly mixing, then adding fluorine-containing silane and dopamine hydrochloride, and reacting at room temperature for 6-24 hours; the catalyst is an amine compound; (3) filtering, washing with the organic solvent until the color of the filtrate is clear, drying, and obtaining modified ammonium perchlorate particles. The application realizes uniform and complete coating of the polydopamine coating on the ammonium perchlorate by one-step method, meanwhile, the fluorine-containing silane is introduced to crosslink the polydopamine coating, effectively improves the interface coverage of the polydopamine on the ammonium perchlorate, reduces the sensitivity of the ammonium perchlorate, and reduces the hygroscopicity of the ammonium perchlorate.

The invention relates to the technical field of AP (ammonium perchlorate) modification, in particular to a preparation method of an ammonium perchlorate anti-moisture-absorption material coated with silicon dioxide based on double-silane synergistic modification through a wet method. Silicon dioxide is subjected to two-step synergistic modification through a long-chain alkylsilane modifier and a short-chain alkylsilane modifier; the preparation method comprises the following steps: modifying the surface by using long-chain silane, filling long-chain silane modified gaps by using short-chain alkyl to prepare modified nano silicon dioxide particles, and coating superfine AP particles with the modified nano silicon dioxide particles through wet modification, the modified nano silicon dioxide particles have enough steric hindrance and better hydrophobicity due to a three-dimensional structure on the surface, and the AP can be effectively prevented from being agglomerated after being coated with the modified nano silicon dioxide particles; the method is green and pollution-free, the process is simple, the comprehensive performance can be easily controlled through simple adjustment, the problem that the ultra-fine AP particles produced industrially are prone to moisture absorption and caking can be solved, and the application range of the ultra-fine AP particles in novel high-energy propellants is widened.