185 results about "Pressure reactor" patented technology

The invention relates to a textured KCu7S4 thermoelectric material and a preparation method thereof, and the method comprises the steps: sequentially adding a prepared KOH aqueous solution, CuCl2. 2H2O and Na2S. 9H2O into a high-pressure kettle, and fully stirring for dissolving; dropwise adding an N2H4.H2O aqueous solution into the mixed solution, fully stirring, sealing, transferring to a microwave chemical synthesis instrument, heating, keeping stirring, and reacting at a target temperature and self-generated pressure to generate a KCu7S4 nanowire preferentially growing along a [001] crystal orientation; and after the reaction is finished and natural cooling is carried out, a product is collected through centrifugation, full cleaning and vacuum drying are carried out, and then the KCu7S4 thermoelectric material with [001] preferred orientation in the direction perpendicular to the pressure direction is obtained through spark plasma sintering. According to the method, a surfactant and an organic solvent are not used, and macro, rapid, efficient and controllable preparation of the KCu7S4 nanowire is realized through a low-temperature, low-cost and low-energy-consumption microwave-assisted hydrothermal process.

The invention belongs to the technical field of oil exploitation, and relates to a drag reducer for fracturing and a preparation method thereof. The preparation method comprises the following steps: adding 1, 5-hexadiene-3, 4-diol and a catalyst into a high-pressure reactor, raising the temperature, introducing ethylene oxide, raising the temperature, carrying out a heat preservation reaction, stopping heating, and cooling to 50 DEG C or below; adjusting the pH value to 2-3 by using phosphoric acid, adding sulfamic acid, heating, preserving heat and reacting, and cooling to below 40 DEG C; the preparation method comprises the following steps: adding deionized water, 2-(trifluoromethyl) acrylic acid and methacryloylethyl sulphobetaine, stirring and dissolving, adjusting the pH value to 7-8, adding an initiator, heating and carrying out a heat preservation reaction to obtain a viscous liquid; and settling, centrifuging, cleaning and drying to obtain the product drag reducer. The drag reducer has the characteristics of high viscosity and high drag reduction rate.

This invention discloses a method for preparing a Pd-BiOI / ordered mesoporous carbon electrode, comprising: step S1, preparing an ordered mesoporous carbon electrode material using a soft template method under low-temperature hydrothermal conditions; step S2, using a three-electrode system, with the ordered mesoporous carbon electrode material as the working electrode, a platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode, using a hydrochloric acid solution containing PdCl2 as the electrolyte, and depositing a Pd / OMCs electrode using a multi-step current pulse method; step S3, adding KI to ethylene glycol and dissolving it by magnetic stirring; then adding Bi(NO3)3•5H2O and stirring magnetically to obtain a mixture a; placing the mixture a and the Pd / OMCs electrode prepared in step S2 in a high-pressure reactor lined with polytetrafluoroethylene, and performing a hydrothermal reaction under high-temperature conditions, followed by rapid cooling after the reaction, removing the electrode and rinsing it with distilled water to obtain the Pd-BiOI / OMCs electrode. The Pd-BiOI / ordered mesoporous carbon electrode prepared by this invention has both excellent electroadsorption and visible light photocatalytic performance, and is expected to become an ideal electrode material integrating electroadsorption and photocatalysis.

The invention discloses an injection and production system and method for improving the CO2 huff and puff effect of a shale and compact oil and gas reservoir based on high-pressure pressure-maintaining soaking, and belongs to the technical field of shale and compact oil and gas reservoir development. The constant temperature device comprises a CO2 intermediate container, an experimental oil intermediate container and a high-temperature and high-pressure reaction kettle which are arranged in a constant temperature box; the CO2 gas cylinder is respectively communicated with the CO2 intermediate container, the experimental oil intermediate container and the high-temperature and high-pressure reaction kettle; and both the CO2 intermediate container and the experimental oil intermediate container are communicated with the constant pressure pump. According to the method, the reservoir energy can be effectively maintained by adopting a high-pressure pressure-maintaining soaking technology, the problem of poor recovery efficiency caused by pressure drop in the CO2 huff and puff process can be effectively solved, the oil displacement effect of CO2 in the shale reservoir is remarkably improved, and the recovery degree of each turn can be remarkably improved.

The application provides a kind of gas diffusion layer base material and its application in polymer electrolyte membrane fuel cell, the preparation of base material includes the following steps: S1, graphene oxide is added to n-hexane, nanofibrous iron-nickel alloy powder and melamine are stirred, the solution is moved to high-pressure reactor for hydrothermal reaction, calcination is carried out under inert gas atmosphere, product is obtained, the product is stirred in hydrochloric acid solution, filtration and washing are carried out, and N / C@Ni material is obtained;S2, short carbon fiber, modified polyurethane and adhesive are prepared into raw paper by dry papermaking or wet papermaking;S3, N / C@Ni material is added to anhydrous ethanol to obtain a solution, the raw paper of S2 is immersed in the solution, vacuum treatment, hot pressing, carbonization, and the target gas diffusion layer base material is obtained.The gas diffusion layer base material of the application has the characteristics of thin thickness and stable structure, can reduce the waterlogging phenomenon of fuel cell, improve the mass transfer capacity, and has good application prospect.

This application relates to a method for preparing multi-acid modified Cu₂MoS₄ electrode materials, belonging to the field of new energy materials and photoelectric conversion technology. An in-situ synthesis method is employed, using a one-step solvothermal preparation technique to dope Cu₂MoS₄ materials with SiW. 11 Co; includes the following steps: S1. Dissolve sodium molybdate and thioacetamide in ethylene glycol, and then add SiW to the solution. 11 Co is dissolved, and finally Cu2O is added. The above mixed solution is ultrasonically treated at room temperature for 10-15 min to obtain a uniform dark brown suspension. S2. After stirring for another 5 min, the precursor suspension is transferred to a high-pressure reactor for a solvothermal process of 22-24 h. S3. The reactor is cooled to room temperature, and the final product is washed three times each with deionized water and anhydrous ethanol by centrifugation, and then vacuum dried to obtain SiW. 11 Co / Cu2MoS4 composite material. This invention utilizes an appropriate amount of SiW... 11 The introduction of Co creates a rough structure on the surface of Cu₂MoS₄, increasing the number of active sites and the specific surface area. This results in catalytic performance and stability that are far superior to those of traditional Cu₂S counter electrodes and unmodified Cu₂MoS₄ counter electrodes.

This invention discloses a high-pressure reactor with adjustable baffles, which includes a reactor body, several baffle components and stirring components. The baffle components are evenly spaced along the length of the reactor body and arranged inside the reactor body to divide the interior cavity of the reactor body into several isolated chambers. Each baffle component includes a fixed baffle, a movable baffle, and a lifting drive mechanism. The stirring components are respectively set in each of the isolated chambers. The beneficial effect of this invention is that during stirring, the first through-slot is staggered with the second through-slot to enhance the blocking effect on the material, thereby improving the stirring effect and the pressure leaching efficiency. After stirring is completed, the movable baffle is driven by the lifting drive mechanism to move and align the first through-slot with the second through-slot, allowing the material to quickly enter the next isolated chamber. Thus, this device can improve the blocking effect of the baffles on the material, enhance the stirring effect, and increase the pressure leaching efficiency without affecting production efficiency.

The application discloses a backflow prevention system, which comprises a flow regulating valve, a cut-off valve, a check valve, a differential pressure low interlock and a signal processing unit. A feed pump is communicated with the flow regulating valve, the check valve, the cut-off valve and a high-pressure reactor in sequence. The differential pressure low interlock is communicated with an inlet pipeline connecting the feed pump and the flow regulating valve at one end and with an outlet pipeline connecting the cut-off valve and the high-pressure reactor at the other end. The output end of the differential pressure low interlock is connected with the input end of the signal processing unit in communication. The output end of the signal processing unit is connected with the control end of the flow regulating valve and the control end of the cut-off valve in communication. The signal processing unit controls the on-off of the flow regulating valve and the cut-off valve according to the differential pressure between the two ends of the differential pressure low interlock. The application realizes multi-stage protection of the high-pressure channeling low-pressure working condition by constructing a highly integrated backflow prevention system, and improves the safety of the high-pressure reaction system.

This invention discloses a method for preparing zeolite molecular sieves with precisely adjustable particle size, comprising the following steps: (1) adding aluminum source and other raw materials to deionized water and stirring evenly at room temperature; (2) adding silicon source, stirring at room temperature, and then adding template agent to obtain precursor slurry; (3) adding zeolite molecular sieve, the amount of zeolite molecular sieve being 1-15 mg / g of precursor slurry, transferring the precursor slurry to a high-pressure reactor, fixing it on a homogeneous reactor, heating to 0-150℃, maintaining for 1-200 h, and then heating to 160-230℃ for 3 hours to crystallize for 6-96 h; (4) obtaining zeolite molecular sieve after centrifugal washing, drying, and calcination. The innovation of the preparation method of this invention lies in the first use of a two-stage synthesis method, which can gradually reduce the particle size of the zeolite molecular sieve product while increasing the yield of zeolite molecular sieves. This method successfully synthesized SAPO-34 zeolite molecular sieve with a particle size deviation of less than 0.4 μm and ZSM-5 zeolite molecular sieve with a particle size deviation of less than 0.2 μm.

The present application relates to epoxy resin diluent, especially to a kind of active epoxy resin diluent and its preparation method and application.The present application first multi-functional epoxy compound and catalyst are added to high-pressure reactor, nitrogen is imported to discharge the air in autoclave, temperature is raised to set temperature and CO2 gas is imported, under certain pressure, reaction is started, after reaction, temperature is reduced, exhaust, filtration is obtained cyclic carbonate compound, i.e.active epoxy resin diluent;The cyclic carbonate compound obtained is mixed with epoxy resin uniformly, then amine curing agent is added, and modified epoxy resin is obtained after curing.The active epoxy diluent prepared in the present application can not only reduce the viscosity of epoxy resin, improve its construction performance, but also improve the comprehensive performance of epoxy resin, play the role of toughening modification.

This invention discloses an organic liquid energy storage carrier and its application, relating to the field of liquid organic hydrogen carrier technology. The organic liquid energy storage carrier of this invention is any one of p-fluorotoluene, m-fluorotoluene, o-fluorotoluene, and fluoromethylbenzene. The application method of this organic liquid energy storage carrier is as follows: 4Å molecular sieve, Rh catalyst, cesium carbonate, and the organic liquid energy storage carrier are sequentially added to a high-pressure reactor, and the reactor is sealed before hydrogen gas is introduced. Following this, microwave plasma pretreatment is performed, and then hydrogen gas is introduced until the pressure inside the reactor reaches 50 bar, followed by a hydrogenation reaction. After cooling, post-processing is performed to obtain the energy storage carrier. The organic liquid energy storage carrier of this invention not only possesses excellent safety and extremely low toxicity, but its application method also reduces reaction energy consumption and increases yield. Therefore, this invention has broader application prospects.

This invention belongs to the field of pivalic acid production technology, specifically a catalyst recycling device and a continuous pivalic acid production process, including a base; a hydrolysis reactor is fixedly connected to the base; by opening the solenoid valve on the second water pipe, the impurity layer is fed into the mixer, and bleaching clay is added into the feed pipe to mix with the impurity layer in the mixer. The mixed slurry is sent to the treatment tank for filtration, and finally the filtered liquid is pumped back to the hydrolysis reactor for recycling hydrolysis through the first return pipe; while the dilute sulfuric acid can be discharged from the hydrolysis reactor after the impurity layer is treated by opening the solenoid valve on the third water pipe for concentration treatment, and the concentrated sulfuric acid is returned to the high-pressure reactor for recycling. This device, through its layered structure design, achieves effective separation of various components and recycling of the catalyst in the continuous production of pivalic acid, which not only improves the overall production efficiency, but also reduces production costs and waste emissions, resulting in significant economic benefits.

This invention relates to the field of polymer synthesis technology. This invention provides a controlled polymerization method for a high-alternation-degree ETFE copolymer, comprising the following steps: (1) adding a solvent to a high-pressure reactor, replacing the air, and then filling it with an initial monomer mixture to a total pressure of 1.5-2.5 MPa, wherein the monomer mixture is a mixture of tetrafluoroethylene and ethylene; (2) heating to 60-85°C, adding an initiator to initiate the polymerization reaction; (3) simultaneously adding the monomer mixture continuously or semi-continuously during the polymerization reaction; (4) adding a chain transfer agent, and discharging the product after the reaction, i.e., the high-alternation-degree ETFE copolymer. This invention also provides a controlled polymerization method for a high-alternation-degree ETFE copolymer. This invention also provides an application of the high-alternation-degree ETFE copolymer in new energy, aerospace, high-end equipment manufacturing, and photovoltaic fields. The high-alternation-degree ETFE copolymer of this invention has high alternation degree (>92%), high thermal stability, and excellent mechanical properties.

This invention discloses a BiOBr S-type heterojunction composite photocatalyst, its preparation method, and its application, relating to the field of photocatalytic materials technology. It comprises layers and BiOBr nanosheets, with the layers and BiOBr nanosheets tightly composited to form an S-type heterojunction composite structure, the mass ratio of the layers to BiOBr being 85:15. S1. Preparation: Melamine is placed in a muffle furnace, heated and calcined, then cooled, ground, washed, and dried to obtain a layered structure. S2. In-situ growth of BiOBr: The BiOBr obtained in step S1 is dispersed in a mixed solvent... In step S2, ultrasonic treatment forms a suspension. Bismuth and bromine sources are added to the suspension, and after stirring evenly, it is transferred to a high-pressure reactor for hydrothermal reaction. Step S3. Drying: The product obtained in step S2 is the / BiOBrS type heterojunction composite photocatalyst. The / BiOBrS type heterojunction composite photocatalyst is prepared by in-situ growth method. The process is simple and does not require secondary calcination. It can enable BiOBr to form a heterojunction composite structure with a tight interface, effectively suppressing the recombination of photogenerated electron-hole pairs and improving carrier separation and migration efficiency.

This application relates to a pretreatment device for preventing scaling in a high-pressure reactor. Installed within the reactor, it includes an inner cylinder, an outer cylinder, multiple sealing plates, and multiple air bladders. The inner cylinder is rotatably positioned within the reactor and connected to an external air source. The outer cylinder is fitted around the inner cylinder and fixedly connected to it. Multiple openings are evenly arranged circumferentially on the outer wall of the outer cylinder. The sealing plates are located outside the outer cylinder and are movable relative to their corresponding openings. One side of each air bladder is fixedly connected to a sealing plate, and the other side is fixedly connected to the outer wall of the inner cylinder and communicates with it. When a scale inhibitor is injected into the reactor, the air bladders expand outwards towards the outer cylinder, and the corresponding sealing plates move away from the openings, gradually occupying the internal cavity of the reactor. At this point, most of the internal cavity of the reactor is occupied by the air bladders, requiring only a small amount of scale inhibitor to form a uniform coating on the inner wall of the reactor, enhancing the scale inhibition effect while reducing costs.

The utility model relates to the technical field of pressure relief devices, and particularly discloses a safety pressure relief device of a high-temperature and high-pressure reactor for coal chemical industry, which comprises a communication mechanism, the communication mechanism comprises a transition bin, an inlet pipe and an outlet pipe, a pressure relief bin is arranged on the upper surface of the transition bin, and an electromagnetic ball valve and a processing mechanism are mounted in the pressure relief bin; the processing mechanism comprises a fixed seat arranged on the upper surface of the pressure relief bin, and a movable seat is mounted in the fixed seat; according to the device, the movable seat with the treatment bin is arranged, so that shunted gas does not directly flow to the outside but enters the treatment bin through the fixed seat and the movable seat, and an activated carbon filter layer and an acid-base filter layer in the treatment bin can perform effective harmless treatment on the gas; and an external flange is arranged on the treatment bin and used for being connected with an external storage bin, so that gas is recycled and waits for unified treatment, harmless treatment can be conducted on the discharged gas while pressure relief is achieved, and pollution to the environment is avoided.

The invention belongs to the field of underground hydrogen storage physical simulation experiments, and particularly relates to a gas-liquid concentration real-time sampling and measuring experimental device for a high-temperature and high-pressure reaction kettle. A hydrogen cylinder, a hydrogen pump and a first two-way valve are sequentially connected in series through a pipeline, and the tail end of the pipeline penetrates through a screw hole in the upper part of the reaction kettle and is positioned above a set liquid level in the reaction kettle; a deionized water bottle, a deionized water pump, a second tee joint and a second two-way valve are sequentially connected in series through a pipeline, and the tail end of the pipeline penetrates through a screw hole in the upper part of the reaction kettle and is positioned above a set liquid level in the reaction kettle; the second tee joint is also sequentially connected with a fifth two-way valve and a gas chromatograph through a pipeline; a nitrogen cylinder, a nitrogen pump, a first tee joint and a third two-way valve are sequentially connected in series through a pipeline; the tail end of the pipeline penetrates through a screw hole in the upper part of the reaction kettle and is positioned below a set liquid level in the reaction kettle; and the first tee joint is also sequentially connected with a fourth two-way valve and a micro-fluidic chip through pipelines. The gas-phase component and ion concentration in the reaction kettle can be measured under the condition that the high-temperature and high-pressure reaction kettle is not opened.

In a first aspect, the invention provides a process for preparing silicon-containing composite particles, the process comprising the steps of: (a) providing a plurality of porous particles comprising micropores and / or mesopores, wherein: (i) the particle diameter D 50 of the porous particles is in the range of 0.5 to 200 μm; (ii) the total pore volume of micropores and mesopores measured by gas adsorption is in the range of 0.4 to 2.2 cm 3 / g; (iii) the pore diameter PD 50 measured by gas adsorption is no more than 30 nm;(b) combining a porous particle charge with a silicon-containing precursor charge in a batch pressure reactor, wherein the porous particle charge has a volume of at least 20 cm³ per liter of reactor volume (cm³ / L RV), preferably at least 200 cm³ per liter of reactor volume (cm³ / L RV), and wherein the silicon-containing precursor charge comprises at least 2 g of silicon per liter of reactor volume (g / L RV); and (c) heating the reactor to a temperature effective to induce silicon deposition in the pores of the porous particles, thereby providing the silicon-containing composite particles.

The invention provides a stirring shaft sealing assembly, a stirring shaft and a polymerization reactor. The stirring shaft sealing assembly comprises a connecting flange, a packing seal, a packing seal limiting piece, a sealing cavity component and a mechanical seal. According to the stirring shaft sealing assembly, the mechanical seal and the packing seal are combined to seal the stirring shaft, the packing seal is adopted as the first-stage seal, the mechanical seal is adopted as the second-stage seal, and the sealing cavity is formed between the packing seal and the mechanical seal. And a better packing sealing effect can be realized by injecting a pressure control medium into the sealing cavity. Even if the design pressure in the reactor is relatively high, the packing seal can still be reliably sealed without leakage under the action of the pressure control medium, so that the problem that the packing seal and the reverse spiral seal cannot be applied to the high design pressure reactor in the prior art is solved. The stirring shaft sealing assembly is very suitable for a reactor with the design pressure larger than or equal to 0.5 MPaG.

This invention discloses a method for preparing a noble metal liner for a high-temperature, high-pressure reactor used for gallium nitride (GaN) crystal growth. Through raw material chemical purification, precise powder mixing, hot pressing, vacuum melting, forging and strengthening, precision machining, spin forming, and sealing welding, the integrated assembly of a platinum cylinder and a platinum-iridium alloy sealing seat is achieved. The noble metal liner prepared by this invention possesses excellent high-temperature and high-pressure resistance and superior tolerance to corrosive atmospheres. It can stably adapt to the extreme conditions of GaN crystal growth, and its service life is significantly extended compared to traditional liners. It provides a reliable guarantee for the stable growth of large-size, low-defect GaN crystals, effectively improving crystal preparation quality and mass production efficiency. It is suitable for high-end electronic information industries such as GaN semiconductor material preparation.

The invention relates to the technical field of high polymer material processing, and discloses a supercritical CO2 assisted devolatilization and microcellular foaming integrated method for preparing optical-grade PMMA (polymethyl methacrylate), which comprises the following steps: conveying a PMMA prepolymer containing a residual methyl methacrylate monomer into a high-pressure reaction kettle to be in contact with supercritical CO2 and saturated; then, the saturated melt is subjected to rapid pressure reduction, CO2 dissolved in the melt is separated out to form a micropore structure, and residual monomers are synchronously brought out; and cooling and shaping to obtain the optical-grade PMMA material. By adopting the method disclosed by the invention, integrated preparation of efficient removal of PMMA residual monomers and micropore lightweight forming can be realized at a lower processing temperature, and the obtained material has lower residual monomer content, lower density, higher light transmittance and lower haze.

The utility model relates to the technical field of hydrometallurgy, and particularly discloses a high-pressure reaction kettle for gradient continuous leaching. The reaction kettle comprises a reaction kettle main body and an overflow assembly, wherein the reaction kettle main body is provided with an upstream end and a downstream end which are opposite; the number of the overflow assemblies is (M + N), and all the overflow assemblies are arranged in the reaction kettle main body at intervals in the length direction of the reaction kettle main body and can move in the length direction of the reaction kettle main body; along the direction from the upstream end to the downstream end, the first compartment is provided with a feed port, and the (M + N + 1) th compartment is provided with a discharge port; the length of the first compartment is longest, the lengths of the second compartment to the Mth compartment are the same and second, and the lengths of the (M + 1) th compartment to the (M + N + 1) th compartment are the same and shorter. The reaction kettle is used for realizing gradient control, reducing inner wall scaling and matching reaction kinetics requirements, so that the leaching rate and the reaction efficiency are improved, and the process application range is expanded.

Ethylene, and one or more polar comonomers, and optionally one or more (C3-C3) 12 A process for polymerizing α-olefins and optionally aluminum compounds in the presence of a catalyst system to form ethylene copolymers in a high-pressure reactor at a pressure greater than 1000 barg and a temperature greater than 100°C, wherein the catalyst system includes a transition metal catalyst.

The application discloses a kind of rare earth hydride nanoparticles solvothermal method preparation process, it is with rare earth metal salt, lithium hydride and graphene as raw material, it is added in high-pressure reactor containing organic solvent and mixed uniformly, it is heated to 100-120 DEG C under inert atmosphere condition stirring, incubation reaction 1.5-2.5 h, after reaction is finished, cooling to room temperature, filter collection black product, wash with organic solvent, finally product is vacuum dried at 65-75 DEG C 1-2 h, obtain the rare earth hydride nanoparticles.The application process is simple and efficient, the product obtained is small and uniformly distributed, high purity, when it is used for neodymium iron boron magnet grain boundary diffusion technology, it can be effectively attached in the grain boundary region of neodymium iron boron magnet, decompose and release active rare earth element at high temperature, so as to adjust the composition and structure of grain boundary, can significantly improve the thermal stability and coercive force of magnet, while reducing the use amount of heavy rare earth and production cost.

The high-pressure reaction kettle comprises a kettle body, a stirring device is arranged in the kettle body, the stirring device comprises a stirring shaft driven by a motor outside the kettle body, an inner spiral blade and a plurality of connecting rods are arranged on the stirring shaft, an outer spiral blade is arranged between one ends of the adjacent connecting rods, and the outer spiral blade is arranged between the other ends of the adjacent connecting rods. The spiral directions of the outer spiral blade and the inner spiral blade are opposite, the outer edge of the outer spiral blade is provided with a flexible cleaning piece, and the other end of the connecting rod is provided with a stirring paddle; a plurality of ultrasonic vibration plates which are distributed in a vertically staggered manner are arranged on the inner wall of the kettle body, an ultrasonic generator is arranged outside the kettle body, and the ultrasonic vibration plates are controlled by the ultrasonic generator. The reaction kettle disclosed by the utility model has the characteristics of improving the mixing effect, the reaction synthesis efficiency and the discharging speed.

The invention relates to a high-entropy alloy loaded transition metal oxide composite catalyst for hydrogen storage and a preparation method thereof.The preparation method of the composite catalyst comprises the steps that an iron source, a cobalt source, a nickel source, a chromium source, a copper source and terephthalic acid are dissolved in an organic solvent, ultrasonic oscillation is conducted till all the materials are dissolved to form a transparent solution, and a solution A is obtained; transferring the solution A into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing and heating, and cooling to obtain a solution B; successively adding absolute ethyl alcohol and deionized water into the solution B, and centrifugally cleaning the solution to obtain a colloidal precursor; transferring the colloidal precursor into a vacuum oven, and drying to obtain precursor solid particles; and calcining the precursor solid particles in an argon atmosphere to obtain the composite catalyst. The high-entropy alloy loaded transition metal oxide composite catalyst has excellent hydrogen storage performance when applied to a magnesium hydride-based solid hydrogen production material.

The utility model belongs to the technical field of chemical equipment, and discloses a fixing assembly for a high-pressure reactor and a reaction unit, which comprises a square tube profile, embracing belts are slidably mounted on the inner wall of the square tube profile at equal intervals, a high-pressure reactor is mounted between the two embracing belts, a bolt structure is connected between the two opposite embracing belts in a penetrating manner, and the high-pressure reactor and the reaction unit are fixed through the bolt structure. The device comprises a square tube profile, a clamp main body is clamped and mounted on the outer side of the square tube profile, a high-pressure reaction tank is clamped and mounted at the position, located at one end of the square profile, in the clamp main body, arc-shaped clamping plates are slidably mounted at connectors of the two ends of the clamp main body, a fixing plate is welded and mounted on the rear side of the clamp main body, and a sliding rail is fixedly mounted on one end face of the fixing plate. The hoop can adapt to high-pressure reactors of different sizes, the degree of tightness of fixing bodies of the high-pressure reactors can be adjusted, stability is improved, the hoop supporting mode is more stable, and dismounting and mounting are convenient.

This invention discloses a method for preparing in-situ grafted and dispersed nano-silica, relating to the field of nanomaterial preparation technology, comprising the following steps: Step ①, mixing sodium-free silica sol solution, water, and polyol in a high-pressure reactor; Step ②, gradually raising the reactor temperature from room temperature to 150-180℃, initially introducing acid anhydride gas or liquid at a certain flow rate, and maintaining temperature, constant pressure, and rotation speed until the pH value reaches 4.0-5.0±0.5, obtaining a primary mixture of hydrated nano-silica; Step ③, pumping an organosilicon coupling agent into the high-pressure reactor using a high-pressure metering pump, maintaining temperature and pressure, stirring the reaction for 30-90 minutes, then cooling, depressurizing, purging with nitrogen, and separating the reaction liquid to obtain grafted and dispersed nano-silica. This application aims to achieve readily available and inexpensive raw materials, reduce the difficulty of preparing nano-silica; solve the problems of dispersibility and compatibility with organic matter in nano-silica; simplify the procedure and improve preparation efficiency.

This invention discloses a method for preparing a perfluorosulfonic acid resin alcohol aqueous dispersion. The method involves: placing solid perfluorosulfonic acid resin in a high-pressure reactor, using water as a solvent, and dissolving it under high temperature and pressure for 4–20 hours under inert gas protection to obtain a perfluorosulfonic acid resin aqueous dispersion; placing the perfluorosulfonic acid resin aqueous dispersion in a glass reactor, mixing it with an organic solvent, and reacting it under certain temperature conditions for 2–8 hours to obtain a perfluorosulfonic acid resin alcohol aqueous dispersion with uniformly dispersed molecular chains after secondary dispersion. Using this invention, the process is simple, time-efficient, and suitable for industrialization. The prepared perfluorosulfonic acid resin alcohol aqueous dispersion has a moderate particle size and uniformly dispersed molecular chains, making it suitable for proton exchange membrane coating processes, and thus enabling the preparation of composite proton exchange membranes with excellent mechanical and electrochemical properties.

This invention discloses a method for preparing diesel fraction from waste tire pyrolysis oil via catalytic hydrogenation, and the resulting diesel fraction, belonging to the field of solid waste resource utilization and petroleum hydrorefining technology. This invention addresses the problems of high sulfur, nitrogen, and gum content in waste tire pyrolysis oil, easy catalyst deactivation in laboratory trials, difficulty in controlling the hydrogenation upgrading effect, and the inability of the product to consistently meet the China VI standard. The method first removes solid slag, heavy gum, and moisture through a stepped pretreatment process to obtain refined raw materials. Then, hydrogenation upgrading is completed in an intermittent high-pressure reactor using a pre-sulfurized hydrogenation catalyst. Finally, the target product is obtained through fractionation. This invention's process is compatible with conventional laboratory equipment, is safe and controllable, and the core indicators of the product diesel fraction fully comply with the China VI b automotive diesel standard.