157 results about "Boron trifluoride" patented technology

The invention relates to the technical field of organic functional material synthesis and mycotoxin removal, in particular to a magnetic covalent organic framework for adsorbing zearalenone and a preparation method and application thereof.The magnetic covalent organic framework is Fe3O4 (at) COF-VPBA and is prepared from 1, 3, 5-tris (4-aminophenyl) benzene, 2, 5-dimethoxy terephthalaldehyde, 4-alkenyl phenylboronic acid, boron trifluoride diethyl etherate, 2, 3-dichloro-5, 5-di (4-aminophenyl) benzene, 2, 5-dimethoxy terephthalaldehyde, 2, 5-dimethoxy terephthalaldehyde, 2, 5-dimethoxy terephthalaldehyde, 2, 5-dimethoxy terephthalaldehyde, 2, 5-dimethoxy terephthalaldehyde, 2, 5-dimethoxy terephthalaldehyde, 2 The catalyst is prepared from 2, 6-dicyano-1, 4-benzoquinone and nano ferroferric oxide through a four-component one-pot in-situ Povarov reaction. According to the method, the process is simplified, the defects of a fractional step method are avoided, due to specific covalent binding of boric acid groups and ZEN catechol hydroxyl groups, the adsorption capacity and the adsorption rate are remarkably superior to those of traditional and unfunctionalized adsorption materials, the adsorption rate still exceeds 90% after acetonitrile is eluted and regenerated and is repeatedly used for more than 5 times, and the comprehensive requirements of high selectivity, high adsorption capacity, easiness in separation and recyclability are met.

The invention discloses a phototherapy reagent and a preparation method and application thereof. The preparation method comprises the following steps: 1-[4-(diethylamino) phenyl]-ethane-1-ketone and 4-methoxybenzaldehyde are subjected to a condensation reaction in a NaOH ethanol solution, and a product and nitromethane are subjected to addition; performing condensation and addition on the other groups of raw materials by the same method; cyclizing the two addition products with ammonium acetate, and coordinating with boron trifluoride diethyl etherate to obtain NHM; carrying out substitution reaction on the NHM and sodium nitrite to obtain NOO; and oxidizing NOO by m-chloroperoxybenzoic acid to obtain NNOO. The reagent can target a tumor hypoxia microenvironment, hypoxia monitoring is achieved, NO is released through photostimulation for tumor gas therapy, meanwhile, the secondary amplification photo-thermal therapy effect is achieved, preparation is controllable, diagnosis and treatment are integrated, and the reagent is sensitive, safe and suitable for biomedical research and clinical diagnosis.

The invention relates to a continuous production method of ultra-pure 2, 3, 4, 4 '-tetrahydroxybenzophenone, which comprises the following steps: completely dissolving p-hydroxybenzoic acid in high-boiling range petroleum ether, and completely dissolving pyrogallic acid in the high-boiling range petroleum ether; the preparation method comprises the following steps: adding a p-hydroxybenzoic acid solution and a pyrogallic acid solution into an ultra-pure continuous reactor group, adding boron trifluoride diethyl etherate into the ultra-pure continuous reactor group at a flowing speed, reacting at 110-140 DEG C, adding the obtained reaction solution into the next ultra-pure continuous reactor group, stirring in ice water, filtering, washing and recrystallizing to obtain the 2, 3, 4, 5-tetramethyl-3, 5-dihydroxybenzoic acid. According to the present invention, the reaction time is substantially shortened, the conversion rate is 70-80%, the purity of the obtained electronic product is more than or equal to 99.2%, the content of the metal ions such as sodium, aluminum, copper, iron, calcium, zinc and boron is less than or equal to 60 ppb, the reaction materials, the reaction temperature and the reaction rate are controllable, the reaction is sufficient, the yield of the obtained target product is stable, and the method can be used for continuous production.

The invention relates to a catalytic hydrolysis method of waste epoxy resin, which comprises the following steps: putting the waste epoxy resin into a reaction kettle, adding ultrapure water, adding a small amount of sodium dodecyl diphenyl ether disulfonate surfactant and a boron trifluoride acetic acid catalyst, and carrying out hydrolysis reaction to realize catalytic degradation of the epoxy resin. Degradation products can be converted into epoxy monomers and anhydride monomers, so that cyclic utilization is realized. Compared with the prior art, the degradation method provided by the invention is not only green and safe, but also high in degradation efficiency, solves the problem that the waste epoxy resin cannot be recycled, saves resources, meets the green development requirement, and has practical engineering application value.

The invention discloses a graphene-containing carrier material, a negative pressure container containing the same and used for storing electronic gas, and a use method and a preparation method of the graphene-containing carrier material. The negative pressure container comprises a bottle body, a valve and a carrier material filled in the bottle body, and the carrier material comprises graphene. By utilizing the characteristics that the selected carrier material has a relatively high specific surface area and a relatively large pore volume, the whole negative pressure container is filled with the carrier material so as to load and unload electronic gases including arsine, phosphorane, boron trifluoride and the like, and excellent loading capacity and unloading capacity are shown; the product type of the negative pressure container capable of containing the electronic gas is expanded, and the benign development of the negative pressure container market is guaranteed.

The invention provides a device and a method for on-line measurement of boron concentration in a boron trifluoride complex system, and relates to the technical field of boron-10 acid production. The device comprises a neutron emission part, a fluid circulation part, a neutron detection part and a data processing part. The neutron emission part is used for emitting thermal neutron beams, the fluid circulation part is communicated with a fluid pipeline at the bottom of an exchange rectifying tower of the boron trifluoride-anisole complex production process, and the fluid circulation part is of a neutron penetrable structure; the neutron detection part is arranged on the side, away from the neutron emission part, of the fluid circulation part and used for receiving thermal neutron beams penetrating through the boron trifluoride-anisole complex and converting neutron intensity signals into electric signals, and the data processing part is electrically connected with the neutron detection part and used for receiving the electric signals and sending the electric signals to the fluid circulation part. And inverting the concentration of boron-10 in the boron trifluoride-anisole complex according to the attenuation degree of the thermal neutron beam to obtain the total concentration of boron. The device can output the total boron concentration measurement result in real time, and sampling can be carried out without interrupting the production process.

The invention relates to a method for producing polyacetal resin. Provided is a method for producing a polyacetal resin with which it is possible to stably and continuously produce a polyacetal resin over a long period of time while suppressing the generation of a tar-like precipitate caused by a polymerization catalyst. A method for producing a polyacetal resin, characterized by comprising a polymerization step in which a polymerization reaction is carried out using (a) a cyclic ether and / or a cyclic formal containing at least trioxymethylene, (b) boron trifluoride or a boron trifluoride complex, and (c) an organic solvent. And the organic solvent (c) is a compound represented by a predetermined formula (1).

The application discloses a kind of efficient adsorption separation method of impurities in borane preparation process, belong to gas separation technical field.The method includes: after ZIF-8 powder is vacuum dried, with 3-aminopropyl triethoxysilane in anhydrous toluene at 80 ℃ reflux reaction 12-24 hours, after washing, dry and obtain amido functionalization NH2-ZIF-8 composite adsorbent;It is filled in vertical fixed bed adsorption tower, and under-30 ℃-20 ℃, 0.3-0.8MPa, the crude ethyl borane gas containing boron trifluoride is imported and is adsorbed at low temperature;After adsorption saturation, regenerate by 80 ℃ heating and vacuum extraction.The grafting amount of amido on the surface of NH2-ZIF-8 obtained by the method is 2.0-3.5mmol / g, specific high selectivity adsorption of BF3 is realized, sufficient adsorption sites are provided, and the adsorbent has strong regeneration performance.

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The invention discloses an alpha-aminophosphoryl derivative as well as a preparation method and application thereof. The method comprises the following steps: by taking a quinoline derivative as a raw material and tetrahydrofuran (THF) as a solvent, adding boron trifluoride diethyl etherate in a nitrogen system at the reaction temperature of 0 DEG C, stirring for 15 minutes, reducing the temperature of the reaction system to T1 (-60 DEG C to-30 DEG C), adding a Grignard reagent into the reaction system, and reacting for 30 minutes to obtain a solution A; dissolving a phosphorus reagent in the organic solvent at room temperature in a nitrogen atmosphere to obtain a solution B; and adding the solution A into the solution B, reacting for 6-15 hours at the reaction temperature T2 (0-50 DEG C), and after the reaction is finished, extracting, concentrating and carrying out column chromatography to obtain the target product alpha-aminophosphoryl derivative. The invention provides a novel synthetic route for preparing the alpha-aminophosphonyl derivative, and various phosphorus reagents such as diaryl phosphorus oxide and phosphite ester can be compatible with the reaction. The alpha-aminophosphoryl derivative synthesized by the invention has a good antibacterial effect on gram-positive bacteria, especially staphylococcus aureus.

The utility model relates to the technical field of chemical separation, and discloses a boron trifluoride methyl ether complex feeding distributor of a rectifying tower, which comprises a tower body, an air vent is arranged at the top of the tower body, a fixing component is mounted in the tower body, and a distribution component is mounted in the tower body; the fixing assembly comprises a fixing block, the fixing block is fixedly connected to the interior of the tower body, a fixing frame is placed on the top of the fixing block, a limiting block is fixedly connected to the exterior of the fixing frame, a clamping column is slidably connected to the middle of the limiting block, a clamping groove is formed in the middle of the fixing block, and the clamping groove is connected with the clamping column in a clamped mode. The periphery of the clamping column is sleeved with a spring. According to the utility model, the fixing of the distribution assembly can be quickly completed through the matching of the clamping columns and the clamping grooves; and during maintenance, the device can be easily detached for inspection, maintenance or component replacement.

The invention discloses a preparation method of an LH-1801 key intermediate, and belongs to the field of medicine synthesis. The preparation method comprises the following steps: enabling SM1 and NBS to react in an acid solution to obtain a compound 1; catalyzing the compound 1 and NBS in an organic solvent in the presence of a catalyst to obtain a compound 2; catalyzing the compound 2 and thionyl chloride in the presence of a catalyst to obtain a compound 3; performing Friedel-Crafts reaction on the compound 3 and 2-ethylthiophene in an organic solvent under the catalysis of a catalyst to obtain a compound 4; reacting the compound 4 with triethyl silane and boron trifluoride diethyl etherate in an organic solvent to obtain a compound 5; reacting the compound 5 with a salt solvent in an organic solvent to obtain a compound 6; and finally, reacting the compound 6 with an alkali solvent in an organic solvent to obtain a compound 7, namely the LH-1801 intermediate. According to the method, 2-chloro-4-methyl benzoic acid is used as a starting material, the intermediate steps are simple and mild reactions, the operation difficulty is low, the reaction risk is low, and the method is suitable for industrial production.

The invention discloses a method for analyzing a polymeric lignin structural unit in watermelon peel, and belongs to the technical field of biological substance composition determination methods, the method comprises the following steps: S1, protective pretreatment: mixing a watermelon peel sample with a protective solution containing triphenylmethyl mercaptan; s2, thioacidolysis: adding a reaction solution containing boron trifluoride and ethanethiol, and heating for depolymerization; s3, in-situ neutralization and derivatization: adding a buffer solution, extracting and drying to obtain an organic phase, and then adding a silanization reagent for derivatization reaction; s4, qualitative and quantitative analysis; through the multi-level design of structure protection, efficient derivation and system integration, the established analysis method shows remarkable advantages in the aspects of inhibiting condensation reaction, improving operation safety, shortening analysis period and realizing quantification, effectively overcomes the technical bottlenecks of low recovery rate, high toxicity, long time consumption, incomplete detection and the like in the prior art, and has wide application prospects. And an excellent technical scheme is provided for composition analysis of the plant polymerized lignin.

The invention relates to the technical field of organic synthesis, in particular to a method for continuously producing canagliflozin by using a microchannel reactor. The production method comprises the following steps: reacting M1 and isopropyl magnesium chloride lithium chloride in a microreactor 1 to form an intermediate I; the reaction temperature is-10 DEG C to 10 DEG C; the reaction time is 15 to 45 seconds; reacting the intermediate I with the M2 in a microreactor 2 to form an intermediate II; the reaction time is 20 to 60 seconds; reacting the intermediate II, methanesulfonic acid and C1-C3 alcoholic solution in a microreactor 3 to form an intermediate III; the reaction time is 20 to 60 seconds; and reacting the intermediate III, triethyl silane and boron trifluoride diethyl etherate in a microreactor 4 for 5-10 seconds. The method solves the problems that the micro-channel reactor is easy to block and the product purity is not high.

The invention belongs to the field of rubber materials, and particularly relates to a high-strength heat-resistant soluble rubber material and a preparation method thereof.The preparation method comprises the following steps that a powdery anhydride-terminated polyimide prepolymer is dissolved in DMF, then a catalyst dibutyltin dilaurate solution is added, perfluorobutyl ethyl isocyanate is slowly dropwise added, stirring is carried out, and a mixture is obtained; the polyimide fluorine-containing end-capped copolymer is obtained; dissolving the imide fluorine-containing end-capped copolymer in dry dichloromethane, adding a catalyst boron trifluoride diethyl etherate complex, and introducing ethylene oxide gas into the reaction liquid to obtain a primary hydroxyl-capped fluorine-containing imide block copolymer; a primary hydroxyl-terminated fluorine-containing imide segmented copolymer is used as a soft segment; the high-strength heat-resistant soluble rubber material is prepared through a prepolymer method by taking 4, 4 '-diphenylmethane diisocyanate as a hard segment, and the soluble rubber material is prepared through a primary hydroxyl-terminated, fluorine-containing and imide-block-containing soft segment, so that breakthrough of high strength, high heat resistance and good solubility is realized.

This invention relates to the field of butadiene polymerization technology, and particularly to a butadiene polymerization catalytic system, preparation method, and butadiene polymerization method. The butadiene polymerization catalytic system includes component A, component B, component C, and component D. Component B is an alkylaluminum compound, component C is a boron trifluoride complex, and component D is a homogenizing agent. Component A consists of two parts: component A1 and component A2, wherein component A1 is nickel organophosphate, and component A2 is alkyl nickel acid with a cyclic structure. The preparation process of the catalyst of this invention is simpler, and the product has higher purity, a more defined composition, and a wider and more abundant supply of raw materials, thereby achieving the goals of reducing costs and stabilizing the production process and product quality. Using the technical solution provided by this invention for the production of nickel-based cis-butadiene rubber results in a high polymerization conversion rate of butadiene monomer, good physical and mechanical properties of the product, and low gel content.

The invention discloses an amino acid derivatization method based on ester exchange and application of the amino acid derivatization method in bacterial amino acid stable carbon isotope measurement. According to the method, an alcoholic solution of boron trifluoride serves as a catalyst, carboxyl of amino acid reacts with ester groups in carboxylic ester, the ester groups are transferred to the amino acid, amino-acid ester is generated, and esterification of the carboxyl is achieved; and then carrying out acylation reaction on the amino-acid ester, triethylamine and acetic anhydride to realize acylation of amino groups. According to the method, chemical reagents causing damage to instruments do not need to be used, and generation of water in the reaction process can be avoided, so that the water removal step is omitted, the drying time is shortened, and meanwhile, side reactions and generation of by-products can be reduced. The method disclosed by the invention has good suitability with a stable isotope analysis instrument, can be used for rapidly and accurately determining the stable carbon isotope of the bacterial amino acid in an environmental sample, and has a wide application prospect in the aspects of establishing a bacterial amino acid monomer stable carbon isotope fingerprint database and widening an environmental microorganism traceability technical means.

The invention relates to the technical field of energy storage, in particular to a gel electrolyte, and an electrochemical device and electronic equipment comprising the same, and the gel electrolyte is obtained by gelation reaction of a precursor solution comprising 1, 3-dioxolane, boron trifluoride diethyl etherate, lithium perchlorate and fluoroethylene carbonate. The gel electrolyte provided by the invention can realize a 5.4 V electrochemical stable window, and has high ionic conductivity and excellent cycle performance.

This invention relates to an alkyl sulfonyl fluoride resin, its preparation method, and its applications. The structural formula of the alkyl sulfonyl fluoride resin is shown below: where n1 is 1~10000; n2 = 0~2. The preparation method includes: mixing compound 1 as shown in Formula I with a nitrite reagent and boron trifluoride diethyl ether and performing a diazotization reaction to obtain compound 2 as shown in Formula II; and then performing a fluorination reaction of compound 2 with a sulfur source, a fluorine source or a fluorosulfonylating reagent and an acid under the action of a catalyst to obtain the resin. Compared with the prior art, the preparation method of this invention is simple, the raw materials are readily available, and the prepared sulfonyl fluoride resin has high reactivity and good stability, and can be used as a high-efficiency matrix resin for the preparation of novel functional resins.

The invention relates to a device and method for preparing boric acid from a boron trifluoride-methyl ether complex, the device comprises a steam generator, a gasification device and a reactor, and the steam generator and the gasification device are gathered through a pipeline and then connected with the reactor; the steam generator is used for producing steam; and the gasification device is used for producing a gas boron trifluoride-methyl ether complex. The method for preparing boric acid comprises the following steps: step 1, air replacement; step 2, preheating; 3, enabling water vapor to react with the boron trifluoride-methyl ether complex in a reactor to obtain a primary product; and step 4, after the reaction is completed, continuously keeping the temperature. The boron trifluoride-methyl ether complex reacts with water vapor at high temperature, boron oxide is obtained through a one-step method, the technical route is greatly simplified, the yield of boron is increased, and production energy consumption is reduced.

The present invention relates to a sulfur-based boron trifluoride salt electrolyte containing an unsaturated heterocycle, a preparation method therefor and the use thereof. The electrolyte comprises a boron trifluoride salt represented by general formula I as follows, wherein R' represents an unsaturated heterocycle at least containing one heteroatom and at least containing one unsaturated bond; M is a metal cation; E1 and E2 are independently nonexistent, a group, a chain structure or a ring-containing structure; and R is a substituent. The boron trifluoride salt in the present application can be used as an additive and also as a salt in an electrolyte, and a polymerizable monomer can also be used as a single-ion conductor polymer electrolyte and a polymer skeleton after polymerization. The boron trifluoride salt provided in the present application can be applied to a liquid battery, a solid-liquid hybrid battery, a semi-solid-state battery, a gel battery, a quasi-solid-state battery and an all-solid-state battery, and helps to improve the energy density, cycle stability and service life of a battery. Moreover, the boron trifluoride salt has a low raw material price, a simple synthesis process and good economic benefit.

The application discloses a high-performance epoxy resin adhesive based on boron trifluoride monoethylamine and a preparation and use method thereof. By adding specific triarylsulfonium hexafluorophosphate in the boron trifluoride monoethylamine epoxy resin system, a protonic acid is generated to act on the epoxy group to generate an activated monomer. The activated monomer and the boron trifluoride monoethylamine synergistically act to effectively avoid the generation of low-molecular oxygen-containing cyclic by-products in the boron trifluoride monoethylamine epoxy resin system, solve the problem of poor mechanical properties of the existing epoxy resin adhesive based on boron trifluoride monoethylamine, and significantly shorten the preliminary curing time of the adhesive due to the action of light, effectively avoid the slippage of the adhesive, and realize the pre-bonding. By adding nano metal, the cohesive energy in the system is reduced, and the adhesion of the epoxy resin adhesive to the metal surface is enhanced. In addition, by optimizing and screening the formula, the proportion of triarylsulfonium hexafluorophosphate and boron trifluoride monoethylamine in a specific range is regulated, the generation of low-molecular cyclic epoxy by-products in the system is maximally inhibited, the complete curing of the epoxy resin adhesive is realized, the epoxy resin adhesive reaches the best mechanical properties, and the problems of poor mechanical properties of the existing epoxy resin adhesive based on boron trifluoride monoethylamine and the like are solved.

The application provides an epoxy resin nonionic emulsifier, a preparation method thereof and a water-based epoxy emulsion, and is prepared by the following method: an organic silane containing a hydrolysable functional group and dextran are sequentially added into a water-methanol mixed solvent, the pH value of the mixed solution is adjusted to 3-5 by using an organic acid, stirring is carried out at 35-60 DEG C for 0.5-4 h until the mixed solution is clear and transparent; then, a catalyst, boron trifluoride ether aqueous solution, is slowly added dropwise, and reaction is carried out at 40-60 DEG C for 2-6 h, lye is added dropwise until the pH value is neutral, and after recovery of the solvent, the organic silicon modified polysaccharide epoxy resin nonionic emulsifier OP is obtained. The emulsion prepared by the application has good hydrophobic performance on the surface, improves the water resistance and corrosion resistance of the water-based epoxy emulsion cured film, and simultaneously, under the synergistic toughening effect of the carboxylated dextran and the organic silicon, the tensile strength and flexibility of the water-based epoxy emulsion cured film are significantly improved.

The application discloses an electrolyte with high and low temperature performance under high voltage and a lithium ion battery. The electrolyte comprises a first additive, a cyclic sulfonate compound as a second additive and a lithium oxalate as a third additive. The first additive comprises at least a boron trifluoride complex lithium salt with a structure represented by formula (I-1). The first additive, the second additive and the third additive account for a%, b% and c% of the total mass of the electrolyte respectively, and satisfy the following relationships: 0.2<=b+c<=4; 0.2<=b / c<=10; 0.07<= (b+c) / a<=20. The electrolyte is used in a lithium ion secondary battery. The battery impedance can be reduced under high voltage (>=4.3V), the battery high-temperature storage gas generation is inhibited, the high-temperature performance and the low-temperature performance of the battery are improved.

The invention discloses a preparation method of methyl dehydrojasmonate, and belongs to the technical field of carbocyclic compounds, the method comprises the following steps: bromination reaction, debromination reaction and post-treatment; the bromination reaction method comprises the following steps: mixing dihydro jasmonic acid methyl ester alkenyl ester, a boron trifluoride diethyl etherate complex and a solvent, cooling the system to 9-11 DEG C after mixing is completed, dropwise adding a bromine solution into the mixed system, and controlling the bromine dropwise adding time to be 5.8-6.2 hours; after the bromine is dropwise added, 4-dimethylaminopyridine is added, the system temperature is kept at 9-11 DEG C, the reaction is continued for 3.8-4.2 h, and after the reaction is finished, a bromination reaction filtrate is filtered and collected. According to the methyl dehydrojasmonate prepared by the method disclosed by the invention, the purity of the product is 99.1 to 99.4 percent, and the final yield is 89.8 to 93.1 percent.

The invention provides a method for removing silicon tetrafluoride in boron trifluoride by adopting a chemical method, and belongs to the technical field of purification and impurity removal. The preparation method comprises the following steps: introducing a boron trifluoride raw material into anisole for complex reaction to obtain complex product feed liquid; the molar ratio of the anisole to the boron trifluoride raw material is 1: (0.3-0.8); performing exhaust treatment on the complexing product feed liquid to obtain exhaust feed liquid; the temperature of the exhaust treatment is 30-40 DEG C; the exhaust feed liquid is subjected to cracking treatment, and purified boron trifluoride is obtained; the final temperature of the cracking treatment is 100-120 DEG C. The method disclosed by the invention is excellent in desilicication effect, can meet the requirement of electronic grade boron trifluoride on the content of silicon tetrafluoride, is high in product yield and low in energy consumption, and greatly reduces the cost.

The invention discloses a method for continuously preparing 7-ACT, and belongs to the technical field of chemical synthesis. The method comprises the following steps: (1) simultaneously and continuously introducing a 7-ACA acetonitrile solution and a boron trifluoride acetonitrile solution into a first-stage pipeline mixer for mixing, simultaneously introducing the obtained mixed solution and a triazine ring acetonitrile solution into a second-stage pipeline mixer for quickly mixing and simultaneously reacting to obtain a 7-ACT reaction solution; (2) introducing the 7-ACT reaction liquid and water into a third-stage pipeline mixer, quickly mixing and hydrolyzing at the same time to obtain 7-ACT hydrolysate; (3) sequentially and continuously passing the 7-ACT hydrolysate through an activated carbon column and an aluminum oxide column, and filtering to obtain a 7-ACT liquid to be crystallized; and (4) crystallizing the 7-ACT liquid to be crystallized, filtering, washing and drying to obtain the product 7-ACT. The continuous mixing, reaction, hydrolysis, purification and crystallization processes are realized by controlling the material dosage, the mixing temperature and the mixing time, and the problems of long working hours, low mass and heat transfer efficiency, more side reactions, poor product quality and the like in traditional tank batch production are solved.

The invention discloses a near-infrared two-region imaging material and a preparation method and application thereof, and belongs to the technical field of photoelectric functional materials. The near-infrared two-region imaging material is an aza-fluorine boron pyrrole derivative NJ1040; the preparation method comprises the following steps: dissolving 2-acetylthiophene in ethanol to obtain a mixed solution, adding a potassium hydroxide aqueous solution, stirring, adding 4-diethylaminobenzaldehyde, stirring, and extracting; drying the extracted organic phase, and performing rotary evaporation concentration and purification to obtain an intermediate I; mixing the intermediate I, diethylamine and nitromethane, reacting, extracting, drying the extracted organic phase, and performing rotary evaporation concentration and purification to obtain an intermediate II; mixing the intermediate II, ammonium acetate and ethanol for reaction, adding triethylamine and a boron trifluoride diethyl etherate complex for continuous reaction after rotary evaporation concentration, and extracting; and drying the extracted organic phase, carrying out rotary evaporation concentration, and purifying to obtain the product. NJ1040 nanoparticles are prepared by a nano coating technology, so that the problem of poor solubility of a contrast agent is solved.

The embodiment of the invention relates to the technical field of chemical devices, in particular to an esterification device and a system for manufacturing boric acid. The esterification device comprises an esterification container, a heating piece and a stirring assembly, the esterification container forms an esterification chamber and a liquid inlet, a feed port and a discharge port which are communicated with the esterification container, the liquid inlet is used for introducing a boron trifluoride-methanol complex into the esterification chamber, the feed port is used for introducing a solid defluorination agent into the esterification chamber, and the discharge port is used for discharging the boron trifluoride-methanol complex into the esterification chamber; the boron trifluoride-methanol complex and the solid defluorinating agent are subjected to an esterification reaction in the esterification chamber to generate trimethyl borate and a solid by-product; the heating piece is arranged to heat the esterification chamber and keep the temperature in the esterification chamber stable; the stirring assembly is used for stirring the materials in the esterification chamber, so that the materials are uniformly mixed. According to the esterification device, the temperature in the esterification chamber is kept constant through the heating piece, the reaction process is accelerated through the stirring assembly, and the esterification reaction rate and the material conversion rate can be increased.

The invention relates to a preparation method of C5 alkylene high-viscosity low-molecular-weight liquid resin, which comprises the following steps: (1) mixing petroleum cracked C5 monoolefine, m-pentadiene and a dechlorination solvent, adding the mixture into a continuous kettle, synchronously introducing boron trifluoride gas as a catalyst, reacting at 0-30 DEG C, and collecting the discharged material to obtain a pre-product; and (2) adding organic alcohol, stirring, separating out an organic phase, and carrying out reduced pressure distillation to obtain the liquid resin. By optimizing raw material selection, adopting a proper solvent, utilizing boron trifluoride gas for continuous catalysis and improving a catalyst quenching mode, many problems in liquid resin synthesis in the prior art are solved, a liquid resin product with excellent performance is prepared, the requirement of the market for high-quality liquid resin is met, and the method is suitable for industrial production. And the market competitiveness of the product in related fields is improved.