130results about How to "High reaction conversion rate" patented technology

The invention provides a heat extraction distribution structure for an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the heat extraction distribution structure comprises an inner tube box and an outer tube box, the inner tube box is arranged in the outer tube box, a heat extraction medium inlet cavity is formed in the inner tube box, and a heat extraction medium outlet cavity is formed between the inner tube box and the outer tube box; the heat exchange pipes are U-shaped pipes, a heat removal medium inlet and a heat removal medium outlet are formed in the two ends of each heat exchange pipe correspondingly, and the heat removal medium inlets and the heat removal medium outlets communicate with the heat removal medium inlet cavity and the heat removal medium outlet cavity correspondingly; the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and each heat exchange tube penetrates through two positioning through holes; the problems that in the prior art, a gas-liquid up-flow type bubbling bed reactor is not internally provided with internal components, gas distribution and heat extraction cannot be achieved, and the conversion rate of reaction is low are solved.

The invention relates to the technical field of organic synthesis, in particular to a continuous preparation method of ammonium glyphosate, which comprises the following steps: S1, pre-adding an ammonium glyphosate solution into a batching kettle, then adding glyphosate raw powder and an aqueous solution, and uniformly stirring and mixing to form a slurry containing a glyphosate solid; s2, simultaneously pumping the slurry containing the glyphosate solid and ammonia gas into a micro-channel reactor for reaction to obtain a material A; s3, the material A is divided into two paths to flow into a batching kettle and a material receiving kettle, and the mass ratio of the material A flowing into the batching kettle to the material A flowing into the material receiving kettle is (2-4): 1; s4, adding methanol into the material receiving kettle, and stirring to obtain a crystallized material; s5, mixing ammonium glyphosate particles obtained by centrifuging the crystal material with an auxiliary agent to obtain a semi-finished product; and S6, heating and drying the semi-finished product to obtain the ammonium glyphosate. According to the continuous preparation method of the ammonium glyphosate, provided by the invention, the raw materials can be fully utilized, the reaction conversion rate and the production efficiency are improved, and meanwhile, the cost is reduced.

The invention belongs to the technical field of fine chemical synthesis, and discloses a preparation method of decynediol. The preparation method comprises the following steps: cooling a solvent, mixing with a catalyst, introducing acetylene, and heating to a reaction temperature; dropwise adding methyl isobutyl ketone, and after dropwise adding is finished, carrying out heat preservation reaction to obtain a first product system; adding water, and carrying out layering separation to obtain a decynediol crude product; and finally, rectifying, and recovering the solvent to prepare the decynediol. The catalyst comprises a methoxide and tetrabutyl ammonium hydroxide. According to the preparation method of the decynediol, provided by the invention, the reaction conversion rate and selectivity can be remarkably improved, so that the product yield is improved; the method is simple in process and low in equipment requirement, 100% application of the recovered solvent can be achieved, the recovered solvent is continuously applied for 10 times to prepare the decynediol, and the method still has excellent conversion rate and selectivity, and is a safe and green production method which is low in raw material cost.

The invention belongs to the technical field of catalytic materials, and particularly relates to a macro-micro-nano integrated structured titanium silicalite molecular sieve catalyst as well as a preparation method and application thereof. According to the catalyst, SiC whiskers are grown on the surface of a 3D communicating hole SiC carrier in situ, TS-1 titanium silicalite molecular sieve precursor coating is combined with a steam crystal transformation process, and a TS-1 titanium silicalite molecular sieve coating with framework nickel doping and open mesopores is grown on the surface of the SiC whiskers, so that the loading capacity and catalytic activity of the titanium silicalite molecular sieve are effectively improved; meanwhile, excellent interface bonding force and a continuous heat conduction channel are provided through the SiC whiskers, and the heat transfer performance is enhanced. Compared with a traditional coating, the coating of the catalyst is rougher, and fluid turbulence and mass transfer efficiency are enhanced. According to the structured titanium silicalite molecular sieve catalyst, the utilization efficiency, the reaction rate and the selectivity of the catalyst are remarkably improved through coupling of macroscopic channels, micron pore channels and nano mesopores, and the structured titanium silicalite molecular sieve catalyst is particularly suitable for phenol hydroxylation reaction and olefin oxidation reaction.

The invention discloses a tandem catalysis method for improving the catalytic efficiency of preparing higher alcohol by CO2 hydrogenation, which comprises the following steps: two sections of fixed bed reactors are connected in series, the first section of reactor is filled with a catalyst for preparing olefin by CO2 hydrogenation, and the second section of reactor is sequentially filled with an olefin hydroformylation catalyst and a catalyst for preparing alcohol by aldehyde hydrogenation. According to the invention, segmented catalysis is carried out on the complex process of preparing higher alcohols through CO2 hydrogenation, and a catalyst for preparing olefins through CO2 hydrogenation, a hydroformylation catalyst and an aldehyde hydrogenation catalyst are respectively arranged in an upstream-segment reactor and a downstream-segment reactor, so that the efficiency and selectivity of preparing higher alcohols through CO2 hydrogenation are improved; through tandem catalysis, the selectivity of by-product hydrocarbons can be effectively reduced, the utilization rate of carbon is improved, the selectivity and space-time yield of higher alcohols are remarkably improved, and the separation cost of products is reduced.

The invention discloses a preparation method of ultra-high molecular weight polyethylene with consistent particle size distribution, which comprises the following steps: adding hexane into a first reaction kettle as a solvent, and adding a catalyst, raw materials ethylene and hydrogen into the first reaction kettle for prepolymerization reaction; after the pre-polymerization reaction, reaction slurry discharged from the first reaction kettle enters a second reaction kettle for polymerization reaction; and after polymerization is completed, reaction slurry discharged from the second reaction kettle is subjected to post-treatment, and a finished product is obtained. The catalyst comprises a main catalyst, a cocatalyst and an electron donor; the main catalyst is titanium tetrachloride doped with a magnesium compound; the cocatalyst is aluminum oxide loaded triethyl aluminum and / or diethyl aluminum chloride; the electron donor is a siloxane compound. According to the invention, through a prepolymerization process and catalyst optimization, high-quality ultra-high molecular weight polyethylene with super consistent particle size distribution is prepared.

The invention relates to the technical field of fine chemical synthesis, and discloses a high-conversion-rate preparation method of 2-(2 '-hydroxy-3'-methallyl-5 '-methylphenyl) benzotriazole, which comprises the following steps: mixing 2-(5-methyl-2-((2-methallyloxy) phenyl)-2H-benzo [1, 2, 3] triazole with a solvent, carrying out rearrangement reaction, cooling, crystallizing, washing and drying to obtain 2-(2'-hydroxy-3 '-methallyl-5'-methylphenyl) benzotriazole. The 2-(2 '-hydroxyl-3'-methallyl-5 '-methylphenyl) benzotriazole is prepared through a one-pot method; the solvent is selected from N, N-dialkylaniline compounds or N, N-dialkylaniline compounds with alkyl substituted on a benzene ring. By screening and replacing the Claisen rearrangement solvent, the reaction time is effectively shortened, the reaction conversion rate is greatly improved, the side reaction is remarkably inhibited, the post-treatment difficulty is reduced, and the material and production cost is greatly reduced.

The invention relates to a cyclodextrin grafted N cation bornyl ester polymer antibacterial material, which has the following structure: # imgabs0 #, wherein x is the number of structural units of N cation bornyl ester, namely the degree of polymerization, and x is equal to 20-100; x is one of F <->, Cl <->, Br <-> or I <->. Meanwhile, the invention further discloses a synthesis method of the macromolecular antibacterial material. The cyclodextrin grafted N cation bornyl ester polymer is a natural cyclic oligosaccharide antibacterial material grafted with natural active molecules, and the cyclodextrin grafted N cation bornyl ester polymer prepared through two simple steps has more efficient antibacterial activity, broad-spectrum antibacterial performance and good biocompatibility, and can be applied to the field of biomedicine. And preparing antibacterial materials such as fruit fresh-keeping materials, antibacterial coatings, antibacterial fabrics and the like.

The present invention provides a method for preparing an oxygen cephalosporin intermediate OZ, the preparation method comprising using a compound shown in formula I as a raw material, triphenylphosphine as a desulfurizing agent, toluene and dichloroethane as solvents for reflux reaction, and preparing an oxygen cephalosporin intermediate OZ shown in formula II. The present invention tests the effects of different organic phosphines on the reaction. According to liquid phase reaction monitoring data, triphenylphosphine is the best. By using a specific precipitation solvent, the crystallization effect is good, and the purity of the product is improved. At the same time, the present invention tests the effects of different organic solvents on the reaction. Among them, a mixed solvent of toluene and dichloroethane is the best for the reaction, and the reaction conversion rate can reach more than 80%. The present invention has a short process route, mild reaction control conditions, simple operation, high yield, low cost, and is suitable for industrial production.

The present invention discloses a method for preparing porous microspheres for supporting catalysts, which are obtained by hot pressing inorganic materials and resins and then sintering. The microspheres are inorganic nanoporous microspheres, which are strong and have many holes and can absorb a large amount of catalysts. The present invention also discloses that the porous microspheres supporting the catalyst of the present invention are used for catalytic hydrogenation reactions in fixed bed reactors, and are applied to nitro reduction reactions of nitro compounds, especially reduction of dinitro compounds and polynitro compounds. The obtained amino compounds have high purity and high conversion rate, and the catalyst has strong durability and can be recycled for multiple times and for a long time.

The invention discloses a method for preparing dimethyl carbonate by catalyzing direct carbonylation of methanol by adopting a molecular sieve membrane reactor. Comprising a porous carrier tube and a hydrophilic molecular sieve membrane loaded on the surface of the porous carrier tube, the molecular sieve membrane tube is fixed in a high-pressure reaction kettle in a dead-end mode, the bottom end of the molecular sieve membrane tube is sealed and is spaced from the inner wall of the bottom of the high-pressure reaction kettle, the permeation side of the molecular sieve membrane tube is communicated with the outer side of the reaction kettle, normal pressure is kept, and the reaction kettle is sealed; constructing a kettle type catalytic membrane reactor; (2) adding methanol and a catalyst into a high-pressure reaction kettle, introducing carbon dioxide with a certain pressure, heating the high-pressure reaction kettle, starting a stirring reaction, and removing byproduct water through the pressure difference between two sides of a molecular sieve membrane tube in the reaction process; the molecular sieve membrane is a ZSM-5 molecular sieve membrane or a NaA molecular sieve membrane. Compared with a conventional dimethyl carbonate production method, the method has the advantages that the reaction conversion rate is greatly increased, the production process is greener, and the product separation cost is greatly reduced.

The invention discloses a double-titanium-site high-performance epoxidation catalyst as well as a preparation method and application thereof. The catalyst is prepared by a method comprising the following steps: (1) mixing a template agent and formate in a solvent to obtain a template solution; (2) adding a titanium source, so that formate adsorbs a pair of titanium cores to form a Ti (III)-Ti (IV) double-titanium core precursor; (3) adding a silicon source, and crystallizing by a hydrothermal method, so that titanium grows in a double-core structure; and (4) washing and roasting to obtain the double-titanium core molecular sieve catalyst.

The invention discloses a nitrogen-carbon modified catalyst for preparing butadiene from ethanol and acetaldehyde as well as a preparation method and application of the catalyst, and belongs to the technical field of preparation of butadiene from ethanol and acetaldehyde. The active component of the catalyst is one or more than two of Zr, Hf, Ta, Y, Sn, Zn and Nb in an oxidation state, and the total loading amount of the active metal element M in the catalyst is greater than or equal to 0.1 wt%; the loading amount of the nitrogen element in the catalyst is greater than or equal to 0.1 wt%, the loading amount of the carbon element in the catalyst is greater than or equal to 0.1 wt%, the carrier is a silicon-based carrier, and the silicon-based carrier is obtained by dipping the silicon-based carrier with a soluble salt containing an active component M and a soluble nitrogen carbon source, drying and roasting in inert gas. According to the catalyst, the conversion rate of ethanol and acetaldehyde in the reaction for preparing butadiene through catalytic conversion of ethanol and acetaldehyde can reach 90% or above, the selectivity of butadiene reaches up to 80% or above, stable operation can be conducted for 300 hours or above, and good application prospects are achieved.

The invention belongs to the technical field of organic chemical industry, and particularly relates to a method for preparing hexamethylenediamine through hydrogenation of 6-aminocapronitrile. Comprising the following steps: adding a 6-aminocapronitrile solution into a reaction kettle, activating a catalyst through hydrogen, transferring the activated catalyst into the reaction kettle under the protection of nitrogen, sealing, replacing air in the reactor with hydrogen, pressurizing to 1.5-8.0 Mpa, and stirring for reaction; after the reaction is finished, cooling to room temperature, taking a reacted mixture, and carrying out reduced pressure distillation to obtain hexamethylenediamine; the catalyst is an Al2O3 loaded copper-nickel-based catalyst. According to the method, the hexamethylenediamine is prepared by directly hydrogenating the 6-aminocapronitrile serving as the raw material without adding alkali or ammonia water, and the method is simple in production process, high in process safety, low in production cost, high in reaction conversion rate and yield, high in purity of the hexamethylenediamine and suitable for large-scale production.

The invention belongs to the technical field of synthesis and preparation of aluminum nitride, and discloses a controllable and extensible preparation method of a one-dimensional aluminum nitride nanowire / nanotube, which comprises the following steps: (1) uniformly mixing a solid aluminum source and a solid nitrogen source, transferring the mixture into a rotatable crucible, transferring the crucible into a tubular furnace, sealing the tubular furnace, and carrying out heat preservation for 2-3 hours; vacuumizing and then introducing protective gas; (2) under the condition that protective gas is continuously introduced, the tubular furnace is heated to a preset target temperature for a nitridation reaction, and the nitridation reaction is carried out under the condition that a crucible rotates at a constant rotating speed; and after the reaction is finished, cooling the tubular furnace and stopping the rotation of the crucible to obtain a one-dimensional aluminum nitride nanowire or nanotube product. According to the method, the solid aluminum source and the solid nitrogen source are used as raw materials, and the crucible rotation is introduced during the nitridation reaction to carry out dynamic enabling improvement, so that the single-crystal aluminum nitride nanowire or nanotube with high purity and uniform morphology can be efficiently synthesized.

The invention belongs to the field of compound preparation, and particularly relates to a preparation method of 2-nitro-4-methylsulfonylbenzoic acid. The method comprises the following steps: by taking 2-nitro-4-methylsulfonyltoluene as a raw material, carrying out high-temperature pressurized reaction in a nitric acid and sulfuric acid system, producing water at the same time, and after the reaction is finished, filtering, layering and drying to obtain the 2-nitro-4-methylsulfonylbenzoic acid. The invention provides a method for preparing 2-nitro-4-methylsulfonylbenzoic acid on the basis of nitric acid oxidation without adding a metal catalyst. According to the method, toxic vanadium pentoxide is not used as a catalyst, the recovery treatment of the catalyst is reduced, the use amount of sulfuric acid can be reduced to 25% of the original use amount, and the extracted water is used for tail gas absorption treatment and nitric acid recovery, so that the reaction safety is improved to a great extent, the use amount of raw materials is reduced, the environmental influence is reduced, and the method is suitable for industrial production.

The invention relates to a synthesis process of cyclopentyl methyl ether CPME, which firstly depolymerizes dicyclopentadiene DCPD to cyclopentadiene CPD through a depolymerization kettle at high temperature, then mixes the cyclopentadiene CPD with hydrogen and enters a hydrogenation catalytic distillation tower to generate cyclopentene CPE through a selective hydrogenation reaction, and then etherifies the cyclopentene CPE with methanol to obtain cyclopentyl methyl ether CPME, and the etherification reaction adopts a fixed bed and catalytic distillation combined process. The process of the invention is simple, energy-saving, and highly feasible; the hydrogenation and etherification catalysts have high conversion rates and good selectivity, and the process has the characteristics of high total conversion rate and good selectivity; through the selective hydrogenation of raw material C5, dienes are removed, which is conducive to extending the service life of the etherification catalyst, and the catalytic distillation process is adopted to make the temperature distribution of the reaction temperature area stable, the reaction heat is fully utilized, and the heat consumption is reduced.

The invention provides a novel method for obtaining (4)-(4-cyano-2-methoxyphenyl)-5-ethoxy-2, 8-dimethyl-1, 4-dihydro-1, 6-naphthyridine-3-carboxylic acid (intermediate 5) and an optical isomer (intermediate 5a) thereof through hydrolysis of a fenerenone intermediate III or an optical isomer IIIa thereof, the method does not need to use CuCl2, and the method is simple in operation, easy to implement and low in cost. By controlling the dosage ratio of acid to the initial raw material, or the dosage ratio of Zn powder to the initial raw material, or optimizing reaction conditions, the conversion rate of the intermediate III or intermediate IIIa is unexpectedly improved (not less than 90%), the generation amount of intermediate impurity X is reduced (not more than 5%), the generation of experimental waste acid is reduced from the source, the product purity is also improved, and the production cost is reduced. The method is suitable for industrial large-scale production.

The invention provides a preparation process of cycloazinone. By using a new raw material and an intermediate, the raw material conversion rate and the product purity can be effectively improved, and no special catalyst is needed. The process flow is simple and the production cost can be significantly reduced, so the process has good industrial application value.

The present invention discloses a method for converting multi-source waste biomass into clean energy, including catalyst preparation, multi-source waste biomass mixing and clean energy conversion. The conversion method of the present invention skillfully mixes multi-source biomass including residual sludge, agricultural and forestry waste, livestock and poultry manure, and restaurant waste, adds a homemade catalyst, and effectively realizes the simultaneous conversion of multi-source biomass into clean energy by adjusting the lighting conditions to obtain bioethanol, biodiesel and by-product glycerol; during the reaction process, due to the flexible change of lighting conditions, the lignocellulosic biomass in the multi-source biomass is effectively broken down.

The invention discloses a preparation method of a sacubitril intermediate, which comprises the following steps: adding a metal nickel salt and a chiral diphosphine ligand into a solvent in a nitrogen atmosphere at room temperature, and stirring to react for 0.5-6 hours to prepare a nickel catalyst solution; and under the nitrogen atmosphere, sequentially adding a compound (II), the prepared nickel catalyst solution, a solvent and an additive into a high-pressure kettle, reacting for 6-30 hours at the temperature of 20-100 DEG C and the hydrogen pressure of 1.0-6.0 MPa, after the reaction is finished, carrying out vacuum concentration to remove the solvent, and recrystallizing and purifying residues to obtain the sacubitril intermediate (I), the dr value of the sacubitril intermediate can reach 99 / 1, and the stereoselectivity can reach 99% ee. Compared with the prior art, the method provided by the invention has higher implementation value and social and economic benefits, and has the characteristics of high atom economy, small green pollution, easiness in industrialization and the like.

The invention discloses a method for preparing polyethylene by using hexene as a comonomer through a slurry method and high-molecular-weight polyethylene. Monomer ethylene and comonomer 1-hexene are used as raw materials; uniformly mixing a catalyst and supercritical ethane fluid to prepare a catalyst solvent; raw materials, a catalyst solvent, hydrogen and supercritical ethane fluid are continuously added into a first stirring reaction kettle for a prepolymerization reaction, slurry discharged from the first stirring reaction kettle enters a second stirring reaction kettle for a polymerization reaction, and after polymerization is completed, the slurry is subjected to post-treatment to obtain a finished product. According to the method for preparing the polyethylene by the slurry method by taking the hexene as the comonomer, the melt index, the density and the molecular weight of the product can be improved by the supercritical ethane, and the impact resistance of the material is enhanced.

The application provides a method for synthesizing 3-methyl-2-buten-1-ol, and belongs to the technical field of isopentenol synthesis. The method comprises the following steps: introducing 3-methyl-3-buten-1-ol and an atmosphere containing hydrogen into a fixed bed reactor, and performing a hydrogenation isomerization reaction under the action of a Pd / Al2O3 catalyst to generate 3-methyl-2-buten-1-ol; wherein the content of formaldehyde in the 3-methyl-3-buten-1-ol is 0.03-0.15%. The application adopts a fixed bed reactor to perform continuous production, adopts a Pd / Al2O3 catalyst with low palladium content as the catalyst, the preparation method is simple, the price is relatively low, and the content of formaldehyde in the 3-methyl-3-buten-1-ol is controlled to inhibit a side reaction, so that the reaction conversion rate and the product selectivity are high.

The utility model relates to a chemical equipment technical field, concretely relates to a heat exchange stirring reaction kettle for dispersing agent synthesis, the utility model provides a heat exchange stirring reaction kettle for dispersing agent synthesis, including kettle body, the drive motor of setting at the top of kettle body and the stirring shaft of intruding kettle body inside, the kettle body outside is provided with the jacket, is provided with cooling medium import and cooling medium export on the jacket, the inside fixed setting of kettle body has the fairlead, the fairlead divides the space inside kettle body into the region in the cylinder and the region outside the cylinder, the stirring shaft penetrates the fairlead, is provided with the stirring paddle of being located fairlead inside and the stirrer of being located between fairlead and kettle body inner wall on it, the stirrer is frame type wall scraper, the inside setting of fairlead has built -in heat exchange subassembly, built -in heat exchange subassembly includes the annular central heat exchange pipe of setting at the outside of stirring paddle and the spiral coil pipe around its arrangement.

The invention discloses a preparation method of an isavuconazole hydrolysis impurity, and belongs to the technical field of chemical synthesis. Comprising the following steps: (1) reacting isavuconazole serving as a raw material with an alkaline reagent in a mixed solution of a first solvent and water; (2) removing the first solvent; (3) carrying out reverse extraction by using a second solvent, and concentrating a water phase; (4) dissolving salt from the water phase by using an acidic reagent, and filtering the solid; and (5) pulping the solid with a mixed solution of a third solvent and n-hexane to obtain hydrolyzed impurities. The synthesis route is simple and easy to operate; raw materials are easy to obtain, reaction conditions are mild, implementation is easy, synthesis difficulty is low, and cost is low; the reaction conversion rate is high, decarboxylation side reactions are few, and the target product yield and purity are high.

The invention belongs to the technical field of synthetic chemistry, and particularly relates to a preparation method of a high-chiral-purity suvorexant intermediate. The preparation method comprises the following steps: by taking (5R)-hexahydro-5-methyl-1-benzyl-1H-1, 4-diazepine as an initial raw material, triethylamine as alkali and dichloromethane as a solvent, carrying out BOC acid anhydride protection to obtain an intermediate 1; dissolving the intermediate 1 in methanol, catalyzing by palladium carbon, and removing benzyl protection to obtain an intermediate 2; performing CBZ protection on the intermediate 2 under an alkaline condition to obtain an intermediate 3; and removing BOC protection from the intermediate 3 under an acidic condition to obtain the suvorexant intermediate with high chiral purity. The synthesis process is simple, the yield is high, the chiral purity reaches 99.8% or above, the solvent and the catalyst can be recycled, and the method is green and environmentally friendly.

The present invention provides an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the isononyl alcohol hydroformylation reactor comprises: a housing, the lower part of the housing is provided with a reactant inlet, and the side wall of the upper part of the housing is provided with a reactant outlet; the diffusion device is arranged in the shell and is positioned above the reactant inlet; the distribution device is arranged in the shell and is positioned above the diffusion device; the heat exchange distribution structure is arranged in the shell and located above the distribution device, the heat exchange distribution structure comprises a plurality of heat exchange pipes and at least one distribution plate, the axes of the heat exchange pipes are parallel to one another, the heat exchange pipes are annularly distributed along a plurality of concentric virtual circumferences, the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and the positioning through holes are communicated with the distribution structure. The plurality of heat exchange tubes are respectively arranged in the plurality of positioning through holes in a penetrating manner; the isononyl alcohol hydroformylation reactor solves the problems of non-uniform distribution of gas and liquid reactants, serious back-mixing phenomenon in the reaction process and low reaction conversion rate of the isononyl alcohol hydroformylation reactor in the prior art.

The present invention relates to the technical field of methacrylate synthesis, and specifically discloses a molecular sieve catalyst for methacrylate synthesis and a preparation method thereof. The above-mentioned catalyst preparation method includes: adding type A microporous molecular sieve to anhydrous ethanol and ultrasonically treating at room temperature for 1-2h, adding ethylenediamine, stirring at 50-70°C for 1-2h, and removing anhydrous ethanol by rotary evaporation to obtain a pre-treated molecular sieve; adding the pre-treated molecular sieve, yttrium nitrate, and tetraethyl orthosilicate to an ethanol aqueous solution and stirring evenly, adjusting the system pH value to 8-9, 80-90°C insulation for 5-10h, cooling to room temperature, washing, and vacuum drying to obtain a composite molecular sieve; calcining the composite molecular sieve at 300-500°C for 2-4h, cooling to room temperature, adding to water, adding zirconium nitrate, cesium nitrate, and graphene oxide for ultrasonic treatment for 5-10h, standing for 5-10h, 160-190°C hydrothermal reaction for 2-6h, cooling to room temperature, filtering, washing, and vacuum drying.

The present invention provides a thermal decomposition reactor and a system and a continuous preparation process for preparing fluoroaromatic hydrocarbons. The thermal decomposition reactor includes at least two spiral tubular reactors connected in series; the reaction temperatures of the two spiral tubular reactors are different; the application of the thermal decomposition spiral tubular reactor for the thermal decomposition reaction of hydrogen fluoride diazonium salt of aromatic amine has significant comprehensive advantages compared with the existing intermittent production process and straight tube reactor. The reaction yield can be significantly improved, the operation process is easy to control, the production capacity is increased, the investment cost, energy consumption and labor cost are saved, and it is safe and environmentally friendly.

The present invention belongs to the technical field of methods for recovering triethylamine, and specifically relates to a method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride. The method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride of the present invention comprises the following steps: firstly, adding triethylamine aqueous solution to triethylamine hydrochloride raw material, keeping the solid content less than 30%, then adding liquid ammonia, reacting in a closed stirring manner, controlling the reaction temperature and reaction pressure, and cooling the reaction to room temperature after the reaction is completed to obtain a reaction mixture, and finally filtering to obtain crude ammonium chloride and triethylamine liquid, treating the crude ammonium chloride to obtain pure ammonium chloride, and drying the triethylamine liquid to obtain pure triethylamine. The present invention provides a method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride, which has high reaction conversion rate, good economy, high yield and high purity of the two products.