1897results about How to "Short reaction time" patented technology

The invention relates to the technical field of chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that m-dinitrobenzene is dissolved with alcohol, and selective hydrogenation is conducted in a high-temperature and high-pressure reaction kettle with a palladium catalyst; and co-heating and refluxing the product after selective hydrogenation, a strong alkali aqueous solution, a first solvent and a phase transfer catalyst to obtain the m-aminophenol salt. M-aminophenol salt, p-nitroiodobenzene, alkali and a second solvent are subjected to a co-heating reaction, and then 3-amino-4 '-nitrodiphenyl ether is obtained through post-treatment; the method comprises the following steps: dissolving 3-amino-4 '-nitrodiphenyl ether with alcohol, carrying out hydrogenation reduction with a palladium catalyst, and carrying out post-treatment purification to obtain 3, 4'-diaminodiphenyl ether. According to the method, common m-dinitrobenzene is used as a raw material, m-nitroaniline is obtained through selective hydrogenation, m-aminophenol salt is prepared through the m-nitroaniline, then etherification reaction is carried out, the reaction yield is higher, the purity is better, and side reactions are few.

The invention belongs to the technical field of carbon sequestration, and particularly relates to a fluidization reaction device and method for efficiently mineralizing carbon dioxide by solid waste, and the method comprises the following steps: pretreating the solid waste to obtain solid waste powder; the method comprises the following steps: atomizing an alkaline solvent into water mist, inputting CO2 gas and the water mist into a fluidized bed reactor by utilizing a fan, and adding solid waste powder into the fluidized bed reactor; the mass ratio of the water mist and the solid waste powder entering the fluidized bed reactor and the gas flow speed of the CO2 gas and the water mist are adjusted, gas-liquid-solid three-phase fluidization is conducted on the solid waste powder in the fluidized bed reactor under driving of the gas phase of the CO2 gas, and mineralization reaction is conducted; after full reaction, discharging solid waste powder by using a rotary discharging device, and drying the solid waste powder to constant weight by using a constant-temperature drying box to obtain an auxiliary cementing material; according to the method, the contact efficiency and the mass transfer rate of the solid waste and CO2 can be improved, the solid waste can quickly react with CO2 gas in the fluidized bed reactor, the reaction time is remarkably shortened, and the low cost and the high efficiency of the CO2 mineralization reaction of the solid waste powder are realized.

The invention provides a method for preparing high-purity and fine-particle-size lithium sulfide based on carbon thermal reduction. The method comprises the following steps: weighing lithium sulfate monohydrate, an insoluble inorganic carbon source and cysteine in a set proportion to form a raw material mixture; mixing the raw material mixture with water according to a set solid-to-liquid ratio, performing ultrasonic dispersion to obtain homogeneous dispersion liquid, and enabling the dispersion liquid to pass through a nitrogen circulating spray dryer to obtain uniform and dry precursor powder; in a vacuum environment, carrying out segmented calcination to obtain a crude product lithium sulfide; and in a dry and anhydrous environment, washing the crude product lithium sulfide for multiple times by using absolute ethyl alcohol according to a set liquid-solid ratio to obtain an alcoholic solution containing lithium sulfide, and then obtaining lithium sulfide fine powder through a nitrogen circulating spray dryer. The invention solves the problems of side reaction, low purity, large product particles, uncontrollable particle size and the like of lithium sulfide prepared by a carbon thermal reduction method in the prior art.

The invention relates to the technical field of biological medicine, in particular to a reagent combination, a kit and a detection method for detecting a platelet activation marker PAC-1. The reagent combination comprises a first detection probe, a second detection probe, a third detection probe and a fourth detection probe, the first detection probe is at least formed by coupling DNA1 and a PAC-1 antibody 1; the second detection probe is at least formed by coupling a PAC-1 antibody 2 and DNA2; the third detection probe is DNA3 for marking fluorescent molecules; and the fourth detection probe is an antioxidant combined on a carrier molecule. When the reagent combination or the kit is used for detecting the PAC-1, the cost is low, whole blood can be used for detection, convenience and rapidness are achieved, meanwhile, artificial platelet activation in an in-vitro sample is avoided, in addition, the detection operation process is simple, the overall detection time is short, and the practical requirement for clinical detection of the PAC-1 is met.

The invention discloses a synthesis method of vitamin C ethyl ether, and belongs to the technical field of vitamin derivative synthesis. The synthesis method comprises the following steps: adding vitamin C, benzaldehyde and a catalyst into a first organic solvent, carrying out an aldolization reaction, adding an organic alkali after the aldolization reaction is finished, carrying out a neutralization reaction, adding an alkylation reagent, carrying out an alkylation reaction, and removing the first organic solvent after the alkylation reaction is finished, so as to obtain the vitamin C benzaldehyde. The preparation method comprises the following steps: adding a first organic solvent into a first organic solvent, pulping, filtering, collecting filter residues, washing and drying to obtain 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, carrying out hydrogenation deprotection on the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, filtering after hydrogenation deprotection, collecting filtrate, crystallizing, collecting precipitate, washing and drying to obtain the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid. The vitamin C ethyl ether is obtained. The synthesis method provided by the invention is simple to operate and high in production efficiency, and the obtained vitamin C ethyl ether is high in yield and purity.

The invention provides a mining inorganic environment-friendly reinforcing material and application thereof, and belongs to the technical field of mining reinforcing materials. A component A comprises the following components in parts by mass: 60-80 parts of anhydrite, 5-20 parts of lime, 5-10 parts of silica fume, 2-8 parts of sodium silicate, 1-0.5 part of a naphthalene water reducer, 3-7 parts of an early strength agent and 0.2-0.8 part of lithium salt; the component B comprises the following components in parts by mass: 50-70 parts of cement clinker, 10-30 parts of slag cement, 5-10 parts of iron powder, 1-8 parts of aluminum sulfate, 5-10 parts of calcium carbonate and 0.5-1 part of sodium tripolyphosphate; the component C is prepared from the following components in parts by mass: 10 to 25 parts of water glass, 10 to 20 parts of emulsion, 40 to 60 parts of water, 5 to 10 parts of high-efficiency water reducing agent and 1 to 5 parts of triethanolamine. The mining inorganic environment-friendly reinforcing material provided by the invention is low in reaction heat and is not easy to cause coal combustion.

The invention relates to an isoterpinene 4, 8-epoxide synthesis method, which comprises: blending an isoterpinene raw material, a catalyst, a catalyst auxiliary agent and a solvent, stirring to form a mixture solution, carrying out a mixing reaction on the mixture solution and an oxidizing agent in a reactor, purifying, and drying to obtain the isoterpinene 4, 8-epoxide. And 2, 8-epoxide. According to the synthesis method of the isoterpinene 4, 8-epoxide, an adopted reaction system is moderate in oxidability and mild in reaction condition, double bonds at the fourth position can be directionally oxidized, high oxidation selectivity is achieved, and finally the highest selectivity of the isoterpinene 4, 8-epoxide can reach 95% or above; meanwhile, the method overcomes the defect that the existence of water in a catalytic system in the prior art easily causes ring-opening hydrolysis of epoxidation reaction, accelerates the epoxidation reaction process, shortens the reaction time, and increases the yield of the product, and the highest yield can reach 88% or above.

The invention discloses an intelligent security monitoring and early warning method and system for an industrial control network, relates to the technical field of network security monitoring, and can collect multi-dimensional data such as network traffic, user behaviors and equipment states in real time through a data acquisition module and a system to ensure the timeliness and comprehensiveness of monitoring. Therefore, potential security threats can be quickly identified, and the overall security protection capability is improved. And the data preprocessing module cleans and standardizes the collected data, so that the data quality and consistency are improved, a reliable basis is provided for subsequent risk assessment, and misjudgment caused by data inconsistency is reduced. And the risk assessment module calculates a comprehensive risk index through a multi-dimensional assessment formula, different types of security threats can be identified more accurately, and a scientific basis is provided for a subsequent early warning mechanism. The multi-level early warning mechanism module divides the risk into a low level, a middle level and a high level according to the comprehensive risk index, and a targeted response strategy can be realized.

The invention provides a method for removing refractory organic matters in wastewater, which comprises the following steps: adding periodate into the wastewater, and uniformly mixing to obtain a solution to be irradiated; the addition amount of the periodate is 1-4 mM; performing ionization irradiation treatment on the solution to be irradiated; wherein the irradiation absorbed dose of the ionization irradiation treatment is 0.2 to 3.0 kGy. According to the method, the degradation rate and mineralization rate of the ionization irradiation technology on refractory organic pollutants are improved; the irradiation absorbed dose required by degradation and mineralization of refractory organic pollutants is reduced, and the reaction time is short; degradation and mineralization of refractory pollutants can be realized at normal temperature and normal pressure, and the operation is simple and convenient; the catalyst has no selectivity for degradation-resistant organic pollutants, and is suitable for a relatively wide pH range; the method has a wide application prospect in the field of environmental protection.

The invention discloses a polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer and a preparation method thereof, and relates to the technical field of high polymer materials, and the structure of the polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer is selected from any one of the following structural formulas: # imgabs0. The preparation method comprises the following steps: taking hydroxyl-containing polyethylene glycol and 4-vinyl-1, 3-dioxocyclopent-2-ketone or vinyl ethylene oxide as raw materials; under the action of a palladium catalyst and a phosphine ligand, the polyethylene glycol-poly (2-vinyl) glycol copolymer is efficiently prepared and can be used in the fields of hydrophilic / hydrophobic materials, drug carriers, antibacterial materials, phase change materials, shape memory materials and the like.

The invention relates to a preparation method and application of a mine water flocculation agent with an adsorption function. The mine water flocculation agent is prepared from the following raw materials: a mineral material, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. The preparation method comprises the following steps: carrying out heat treatment on a mineral material, then adding water and chitosan, then adding silicate, reacting to generate polysilicic acid, grafting the polysilicic acid on chitosan macromolecules, then adding aluminum chloride salt and ferric chloride salt, reacting, finally adding polyacrylamide, and aging to obtain the composite material. The mine water flocculating agent provided by the invention can synchronously remove suspended matters, fluorides and COD (Chemical Oxygen Demand), and has the advantages of low dosage, short reaction time and high settling speed.

The invention discloses a method for catalytically synthesizing lactide by using a kaolin-based catalyst, which comprises the following steps: (1) preparing oligomeric lactic acid: carrying out lactic acid dehydration polymerization reaction by using L-lactic acid or D-lactic acid or DL-lactic acid as a raw material to obtain oligomeric lactic acid of which the weight-average molecular mass of an oligomer is 1000-3000Da; and (2) depolymerizing the oligomeric lactic acid: carrying out depolymerization reaction on the oligomeric lactic acid obtained in the step (1) under the action of a kaolin-based catalyst to obtain crude lactide. The raw materials of the catalyst are easy to obtain, the cost is low, the regeneration process is simple, the reaction temperature of depolymerization cyclization is low, the reaction time is short, and the cost can be greatly reduced in industrial production.

The invention provides a preparation method of immobilized D-psicose-3-epimerase, which comprises the following steps: firstly aminating inorganic silicon nanoflowers, then activating by using a cross-linking agent glutaraldehyde, finally adding enzyme liquid, reacting in a shaking table for a period of time, and centrifuging and washing the reactant to obtain the product, namely the immobilized D-psicose-3-epimerase. The enzymatic activity and the stability of the immobilized enzyme are obviously improved, the specific enzyme activity of the immobilized enzyme is 446.44-1033.09 U / g protein, the activity of the immobilized enzyme is 163.09% and 181.53% of that of free enzyme after the immobilized enzyme is incubated for 6 h under the condition that the temperature is 30 DEG C or the pH value is 5, 63.18-70.78% of the initial activity is still reserved after the immobilized enzyme is repeatedly used for 10 times, and 46.27-54.38% of the initial activity is still reserved after the immobilized enzyme is stored for 15 days. The immobilized enzyme can catalyze fructose to generate psicose, and a green and efficient preparation technology is provided for production of psicose.

The invention belongs to the field of nano material preparation, and particularly relates to a preparation method of nanoscale silicon dioxide alcohol-soluble sol. The method comprises the following steps: dissolving a water-soluble polymer in an ammonia water solution, and then adding absolute ethyl alcohol to form a polymer micelle; adding tetraethyl orthosilicate into the micelles, obtaining a nanoscale silicon dioxide nanoparticle mixed solution after the reaction is finished, then dispersing the nanoscale silicon dioxide nanoparticle mixed solution in deionized water through centrifugation, then centrifuging to obtain pure silicon dioxide particles, dispersing the pure silicon dioxide particles in absolute ethyl alcohol, adding a silane coupling agent KH570 at the same time, and performing ultrasonic dispersion to obtain the nanometer silicon dioxide nanoparticles. And carrying out ultrasonic dispersion to obtain the nanoscale silicon dioxide alcohol-soluble sol.

The invention relates to the technical field of TMBP preparation, in particular to a TMBP reaction device and a TMBP synthesis method. The reaction device comprises a closed tank body, a heating mechanism is arranged in the tank body, the tank body is divided into a gas phase area and a liquid phase area from top to bottom, a hollow rotating shaft is arranged in the center of the tank body, the top of the hollow rotating shaft is connected with a motor, a gas inlet mechanism is arranged in the hollow rotating shaft, gas inlet holes communicated with the gas phase area are formed in the upper portion of the side wall, and a gas distribution mechanism is arranged below the side wall. The gas distribution mechanism comprises a plurality of hollow and horizontally-arranged spiral blades which are communicated with the hollow rotating shaft in a sealed mode, the outer side wall is provided with a gas outlet pipe perpendicular to the normal of the outer side wall, and the gas outlet pipe is provided with a one-way nozzle. The device is compact in overall structure, small in occupied area and good in stirring effect, oxygen in a gas phase region can be dispersed into a liquid phase region, the gas distribution mechanism has gas distribution and stirring effects at the same time, the oxygen content and dispersion uniformity in a liquid phase are greatly improved, the reaction efficiency is improved, and the reaction time is shortened.

The invention belongs to the technical field of quartz sand preparation, and discloses high-purity quartz sand and a preparation method thereof. The method comprises the following steps: by taking water, mixed alkali and silicon powder as raw materials, uniformly stirring the silicon powder, the water and an additive to prepare silicon sludge, adding the rest raw materials into a reaction kettle, heating, then adding the silicon sludge into the reaction kettle in a frequency division manner, reacting to obtain a sodium silicate solution, removing anion and cation impurities, then adding an acid solution, heating to obtain silicic acid gel, and drying to obtain the silica gel. The silicic acid gel is subjected to freezing treatment, vacuum microwave drying and chloridizing roasting after unfreezing are conducted, and the high-purity quartz sand is obtained. According to the preparation method, the quartz sand with the purity higher than 99.9999% can be synthesized, the granularity of the quartz sand can be controlled according to the adding proportion of the acid solution, the content of gas-liquid inclusion in the quartz sand is remarkably reduced, and the quality of the quartz sand is improved.

The invention discloses a method for preparing polyetherketoneketone by using a microchannel reactor, and belongs to the technical field of polymer synthesis, a certain amount of sulfur dioxide and Lewis base are added in the reaction to improve the catalytic activity of Lewis acid, improve the selectivity, increase the solubility of a polymer and avoid precipitation of a product in a microchannel; the reaction selectivity is improved through the micro-channel reactor, generation of side reaction impurities of tonnage alcohols is avoided, the obtained product is high in purity, and the step of purifying the intermediate 1, 4-bis (4-phenoxybenzoyl) benzene is omitted; the molecular weight distribution of the product is narrower; the materials are all fed in a liquid mode after being dissolved, and introduction of Lewis acid and mechanical impurities in other raw materials and reagents is avoided through filter pressing; and continuous production can be realized, the production efficiency is improved, and the production cost is reduced.

The invention relates to a preparation method of H12MDA with low trans-trans isomer content and a catalyst used in the preparation method. The catalyst is a supported catalyst and comprises a silicon-aluminum amorphous carrier and an active component, the silicon-aluminum amorphous carrier has a micropore, mesopore and macropore structure and is prepared by carrying out hydrothermal reaction on raw materials comprising an aluminum source and a silicon source in the presence of a template agent, and the template agent is selected from 4, 4-diaminodiphenyl-methane and 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane. The catalyst is one or a combination of two of 1, 4-diaminodiphenylmethane. The catalyst is long in service life and excellent in stability, the yield of an H12MDA target product can be increased, the content of trans-isomers in the product is reduced, and the preparation process is also simple. The invention also provides a method for preparing H12MDA through MDA catalytic hydrogenation, and the method can improve the yield of the H12MDA product and obviously reduce the content of trans-isomers in the product.

According to the application of the ZIF-8 coated hemoglobin composite material in preparation of the lithium-sulfur battery, an enzyme solution, an organic ligand and metal ions are co-precipitated through in-situ biomineralization to prepare an MOF-enzyme compound, the method is not influenced by the size of enzyme molecules, the synthesis condition of ZIF-8 is mild, the structure of enzyme cannot be damaged in the reaction process, and the preparation method is simple and easy to implement. And the synthesis process has the advantages of short reaction time, no need of other organic solvents, capability of expanding multiple synthesis, simple synthesis method and high yield. The results of XRD, FIIR and XPS experiments show that the MOF (at) enzyme compound prepared by the method preserves the inherent structure of the enzyme, and when the MOF (at) enzyme compound is assembled into a battery, the electrochemical performance and the dynamic performance of the battery containing ZIF-8 (at) Hb are better.

The invention belongs to the technical field of lignin depolymerization, and particularly relates to a selective fracture method of micromolecular mercaptan mediated lignin beta-O-4 connection. In an H-type electrolytic tank, an anode electrolytic tank takes a buffer solution as an electrolyte, a cathode electrolytic tank takes a lignin beta-O-4 model compound as a reaction substrate, and an acetonitrile / buffer solution mixed solution of small molecular mercaptan is taken as an electrolyte for electrochemical cracking reaction. Wherein a micromolecular mercaptan medium is used as a single electron transfer medium, and can efficiently and selectively break key C beta-O bonds in a lignin beta-O-4 model compound at normal temperature and normal pressure under the catalytic action of current to obtain corresponding phenol and ketone monomers, so that the problems that high temperature, high pressure and expensive catalysts are usually needed in depolymerization in a lignin reduction way are solved.

The invention discloses a preparation method of a graphene composite lithium iron phosphate positive electrode material, and relates to the technical field of positive electrode materials, and the preparation method comprises the following steps: S1, adding a graphene oxide into deionized water, and stirring to obtain a solution I; s2, dissolving ferric salt in deionized water according to the mass ratio of the ferric salt to graphene oxide of 1: 0.05, adding the solution I, and stirring to obtain a solution II; s3, sequentially adding phosphoric acid, ethylene glycol and lithium salt into the solution II according to the molar ratio of ferric salt to phosphoric acid to lithium salt of 1: 1: 3, and stirring to obtain a solution III; s4, putting the solution III into a reactor, covering and sealing, heating in a gradient water bath, soaking a product obtained in the water bath with deionized water, and drying in a vacuum freeze dryer; s5, vacuum drying; the crystallinity and morphology of the product are optimized by accurately controlling the water bath temperature and time; and a uniform and ordered crystal structure is formed by staged water bath, so that the electrochemical performance of the product is improved.

The invention belongs to the technical field of sodium battery material synthesis, and discloses an in-situ coating method of a sodium ion battery positive electrode material. On the basis of an O3 type sodium ion battery layered oxide electrode material, an amorphous coating layer is constructed on the surface of an oxide through a low-pressure vapor deposition method. The invention provides a novel positive electrode material coating method, the coated material can stably circulate under the high voltage of 2-4.2 V, and the air stability is obviously improved. The sodium ion battery positive electrode material disclosed by the invention is low in raw material cost and environment-friendly, the coating method is simple, and the method has pioneering and universality and has a good application prospect.

The invention discloses a method for continuously and efficiently synthesizing N-methyl p-nitroaniline, which comprises the following steps: S1, preparing a 1-fluoro-4-nitrobenzene solution by using an organic solvent, stirring and dissolving, filtering to remove impurities, and transferring to a container A for heat preservation; s2, preparing a methylamine solution by using an organic solvent, adding a preferred catalyst, controlling the temperature at 25-50 DEG C, and transferring the prepared solution into a container B for heat preservation; s3, exhausting by using an organic solvent, ensuring that no bubbles exist in the micro-mixer and the continuous flow reactor, introducing the material into the continuous flow reactor from the container A and the container B according to a certain proportion through the micro-mixer by using a delivery pump, and adjusting the temperature and pressure in the reactor for reaction to obtain a reaction solution; and S4, after the reaction liquid flows out, collecting the reaction liquid in a container C, filtering the collected reaction liquid, washing with an organic solvent, and drying to obtain a crude product N-methyl p-nitroaniline. The problems of high safety risk, tedious steps, long reaction time and the like of an intermittent kettle type process are effectively solved.

The invention belongs to the technical field of indoor air pollution treatment, and particularly discloses an aluminum hydroxide loaded carbon quantum dot material for removing formaldehyde, gel and a preparation method of the aluminum hydroxide loaded carbon quantum dot material for removing formaldehyde, and the preparation method of the aluminum hydroxide loaded carbon quantum dot material comprises the following steps: uniformly mixing, grinding and dispersing amorphous aluminum hydroxide powder and basic amino acid; transferring into a microwave oven for microwave radiation reaction, filtering, washing and drying after the reaction is finished, and then crushing to obtain the aluminum hydroxide loaded carbon quantum dot material. The preparation method is simple in preparation process, short in reaction time and suitable for industrial production, and the prepared aluminum hydroxide loaded carbon quantum dot material and gel are high in formaldehyde removal rate and have long-term effectiveness.

The present invention discloses a method for upgrading polyester materials to dicarboxylic acid esters and ethylene carbonate, and relates to the comprehensive utilization of waste resources and the cascade utilization of raw materials. The method uses multiple types of green ionic liquid catalysts to catalyze the methanolysis reaction of PET, and then dimethyl carbonate captures the generated ethylene glycol in situ, forms a five-membered cyclic ethylene carbonate through nucleophilic cyclization, pulls the reaction equilibrium to move forward, and completely depolymerizes PET waste. The products of the method of the present invention are dimethyl terephthalate and five-membered cyclic ethylene carbonate. The present invention can be used for the depolymerization and upgrading of waste PET materials, and can also be used for other similar polyesters, such as polyethylene succinate, polyethylene adipate and polyethylene 2,5-furan dicarboxylate, which are also suitable for the recovery strategy of the present invention, and the products are the corresponding dimethyl succinate, dimethyl adipate and 2,5-furan dicarboxylate.

The utility model provides secondary aluminum ash denitrification treatment equipment. The secondary aluminum ash denitrification treatment equipment comprises a grinding device, a slurry pipeline, a gas-liquid separator and a gas collecting pipeline, the slurry pipeline is provided with a slurry inlet end and a slurry outlet end, and the slurry inlet end and the slurry outlet end are both communicated with the grinding device; the gas-liquid separator is arranged on the slurry pipeline and is used for separating gas generated by hydrolysis reaction of the secondary aluminum ash and water; and the gas collecting pipeline is communicated with the gas-liquid separator and is used for collecting gas generated by hydrolysis reaction of the secondary aluminum ash and water. According to the method, wrapping layers on the surfaces of aluminum nitride particles are stripped through the grinding effect, the hydrolysis reaction is continuously and efficiently carried out, the particle size of slurry particles can gradually become smaller in the grinding process, rapid proceeding of the hydrolysis reaction is better facilitated, gas is collected into a gas collecting pipeline in time, the reaction can be carried out in the forward direction, and the reaction efficiency is improved. The decomposition rate of aluminum nitride in the secondary aluminum ash is greatly improved, and the reaction time is shortened.

The invention belongs to the technical field of electrochemical batteries, and particularly relates to an aqueous electrolyte capable of being used for a high-rate tin metal negative electrode and a tin-manganese battery. The aqueous electrolyte comprises an acidic solvent, a tin salt and various high-valence metal salts / charged water-soluble polymers, and can also comprise a manganese salt. According to the method, high-valence metal salt / charged water-soluble polymer is added into the aqueous electrolyte, the repulsive force of double electric layers is adjusted by using introduced charged particles, and the distribution of an electric field and a concentration field at an interface is homogenized, so that efficient ion transmission and uniform and compact tin deposition behaviors are realized. Meanwhile, the charged particles can effectively inhibit related side reactions on the manganese positive electrode side, so that the tin metal negative electrode and the tin-manganese battery can have long cycle life and excellent rate capability at the same time. In addition, the water-based electrolyte is low in raw material price and small in dosage, the reaction process is simple and mild, and the water-based electrolyte has good application and development prospects.

The invention discloses a preparation method of low-volatile-matter side hydrogen-containing silicone oil, and belongs to the technical field of silicone oil production. The preparation method of the hydrogen-containing silicone oil comprises the following steps: (1) adding a hydroxyl-terminated polydimethylsiloxane oligomer (linear body) and a phosphonitrile chloride composite catalyst into a reaction kettle, stirring, vacuumizing, and heating for reaction; (2) detecting the viscosity on line, when the viscosity reaches the specified viscosity, recovering the normal pressure, adding the high-hydrogen silicone oil, hexamethyldisiloxane and phosphonitrile chloride composite catalyst, and reacting at low temperature; and (3) adding a terminator to finish the reaction, and filtering to obtain the hydrogen-containing silicone oil. The hydrogen-containing silicone oil is prepared by adopting the linear body, the high-hydrogen-content silicone oil and the high-catalytic-activity phosphonitrile chloride as raw materials, no obvious cyclosiloxane is generated in the reaction process, the content of low-boiling-point substances is extremely low, the cost of the raw materials is reduced, the problem that a large amount of solid waste is generated in a neutralization reaction in a traditional acid equilibrium catalysis process is solved, and environmental pollution is reduced.

The invention provides a preparation method of apixaban, and belongs to the technical field of raw material medicine synthesis. The intermediate product 5 is prepared by adopting continuous flow equipment, so that the defect of low heat and mass transfer efficiency of an intermittent reaction kettle is overcome, the reaction danger coefficient is reduced, the reaction time is shortened, the product quality is improved, and the product yield is increased; a ferric trichloride / activated carbon-hydrazine hydrate system is adopted for nitro reduction, so that the selectivity is good, and the product purity and yield are improved; the ethanol solution of ammonia is adopted to replace ammonia water, CH3ONa / HCOONH2, mixed anhydride-ammonia water and the like in the prior art, the defects that in the prior art, the content of acid impurities is high, and the amount of post-treated ammonia-containing wastewater is large are overcome, and the environmental protection pressure is reduced while the product quality is improved.

The invention relates to the field of laser cutting, in particular to an anti-collision reset device for three-dimensional laser cutting, which is arranged on a driving mechanism for driving a laser head to move, and the driving mechanism is provided with a driving block on which the laser head is arranged. The anti-collision reset device comprises a sleeve fixedly arranged on the driving block, anti-collision strips movably arranged on the periphery of the sleeve and a reset mechanism. The reset mechanism comprises an elastic connecting piece fixedly arranged between the laser head and the sleeve and a locking assembly in transmission connection between each anti-collision strip and the laser head. The laser head is protected through the anti-collision strip, the laser head is prevented from making direct contact with a welded workpiece, and after the anti-collision strip collides with the welded workpiece, constraint of the locking assembly on the laser head is rapidly relieved, so that the laser head rapidly retracts into the sleeve and is reset to the non-working state of the laser head; and the risk that the laser head is damaged due to collision is avoided.