94 results about "Pressure reactor" patented technology

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.

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 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.

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 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.

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.

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.

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.

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 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.

This utility model discloses a high-pressure reactor sealing structure, relating to the field of reactor sealing technology. It includes an upper flange and a lower flange. The lower flange has a sealing groove on its inner side, and a sealing gasket is installed inside the sealing groove. A fixing ring is located above the upper flange, and a rotating seat is located around the outer perimeter of the fixing ring. A fixing hook is rotatably connected to the rotating seat via a rotating shaft. The lower end of the fixing hook hooks onto the outer surface of the lower flange. A hydraulic cylinder is located at the center of the lower surface of the fixing ring, and the lower end of the hydraulic cylinder abuts against the upper flange. Hydraulic oil distributors are located on both sides above the upper flange. The two hydraulic oil distributors are connected to the hydraulic cylinders on both sides via pipes. This design delays the aging and deformation cycle of the sealing gasket structure and provides a fixing method where the hydraulic cylinder and the fixing hook cooperate, ensuring the pressure inside the tank while facilitating the opening of the end cap.

This invention discloses a method for the catalytic hydrogenation of bio-based small molecule diols to prepare monohydric alcohols. The method includes the following steps: placing an aqueous solution of a bio-based small molecule diol in a high-pressure reactor, adding an activated carbon-supported metal catalyst and a solid or liquid acid, then introducing hydrogen gas at a certain pressure, and stirring the reaction at a certain temperature for a period of time to obtain the monohydric alcohol; the small molecule diol is one of ethylene glycol, 1,2-propanediol, 1,4-butanediol, 1,2-pentanediol, 1,5-pentanediol, and 1,2-hexanediol; the activated carbon raw material is widely available, easy to prepare, and recyclable. The catalyst preparation process is simple, reusable, inexpensive, has high catalytic activity, and the reaction conditions are relatively mild, making it easy to promote.

This invention discloses a device and method for evaluating the proppant-carrying performance of fracturing fluid with continuously adjustable proppant concentration, relating to the field of oil and gas field production enhancement. The device includes a reactor body. The reactor body is equipped with a stirring assembly, a proppant-adding assembly, a heating assembly, and a visualization window. The proppant-adding assembly achieves quantitative and batch-wise addition of proppant within the high-pressure reactor through a series of upper valves, a proppant-to-be-added section, and a lower valve. The method includes: applying experimental temperature and pressure conditions, initiating stirring to simulate dynamic flow, continuously adding proppant in batches through the proppant-adding assembly, monitoring the proppant status in real time using a vision system, and recording and analyzing data to obtain a continuous proppant-carrying performance curve and a limit proppant-carrying value. This invention solves the problem of existing technologies being unable to conduct continuous gradient testing of proppant concentration under high-temperature and high-pressure dynamic conditions, and can obtain complete proppant-carrying performance data of fracturing fluid from low concentration to limit concentration in one go, with evaluation results closer to actual downhole operating conditions.

This invention discloses a Fe2O3-MoO3-CaO oxygen carrier, its preparation method, and its application, belonging to the field of oxygen carrier technology. The technical solution includes the following steps: 1) Preparation of Fe2O3: NaOH solution is slowly added to FeCl3 solution while stirring for 3-5 hours; then sodium dodecyl sulfate is added to the sol, and the above system is transferred to a high-pressure reactor for hydrothermal reaction and calcination to obtain Fe2O3 powder; 2) Preparation of Fe2O3-MoO3 composite material; 3) Preparation of Fe2O3-MoO3-CaO oxygen carrier. The oxygen carrier prepared by this invention has high hydrogen yield and high NH3 conversion rate, good cycle stability, stable crystal form, and maintains high activity after multiple redox cycles, meeting the requirements for industrial recycling.

This invention discloses a gradient pressure reactor for purifying quartz sand using supercritical fluid extraction. It includes a high-pressure cylinder, a medium-pressure cylinder, and a low-pressure cylinder separated along the axial direction, as well as a supercritical fluid injection system, a gradient pressure control system, and a control box. Heating jackets are installed on the outer walls of the high-pressure, medium-pressure, and low-pressure cylinders. A feed pipe is installed on the high-pressure cylinder, and a discharge pipe is installed at the bottom of the low-pressure cylinder. On / off valves are installed between adjacent feed pipes, high-pressure cylinders, medium-pressure cylinders, low-pressure cylinders, and discharge pipes. The gradient pressure control system includes a booster pump for the high-pressure cylinder, a pressure regulating valve for the medium-pressure cylinder, and a back pressure valve for the low-pressure cylinder. This invention utilizes a high-pressure cylinder for dissolving metallic impurities, a medium-pressure cylinder for removing organic matter, and a low-pressure cylinder for fluid-sand particle separation, thus achieving targeted impurity removal with high efficiency. Furthermore, the supercritical fluid diffuses more fully under different pressure environments, which is beneficial for improving fluid utilization.

This invention relates to the field of electrode materials technology, and particularly to a method for preparing a dual-ion-controlled vanadium dioxide nanowire electrode material. The steps are as follows: S1, dissolve a vanadium source in oxalic acid solution to form a first solution, and stir the first solution in a water bath at 80℃±10℃ for 1-2 hours until the overall color of the first solution changes from orange to dark blue; S2, simultaneously add an aluminum source solution and a zirconium source solution dropwise to the dark blue first solution, and stir at room temperature for 10 minutes to obtain a second solution; S3, transfer the second solution obtained in step S2 to a high-pressure reactor, heat it uniformly to 140℃-220℃, maintain the temperature for 1-6 hours, and allow it to cool naturally to room temperature after the reaction. Wash the reaction product with ethanol and deionized water, and then vacuum dry it at 80℃ for 24 hours to obtain the dual-ion-controlled vanadium dioxide nanowire electrode material. The dual-ion-controlled vanadium dioxide nanowire electrode material provided by this invention has both specific capacity and cycle stability, and has good application value.

This utility model discloses a novel, easy-to-use high-pressure reactor, comprising a support column, a lifting assembly, a reactor body, and a sealing lid. A rotating seat is rotatably mounted in the middle of the support column, and a connecting seat is located on one side of the reactor body. The reactor body is rotatably mounted on the rotating seat via the connecting seat. The lifting assembly is installed on the top of the support column, and the sealing lid is mounted on the lifting assembly. The sealing lid corresponds to the reactor body and is used to seal and fix it. The lifting assembly is used to move the sealing lid up and down for easy opening and closing. This utility model relates to the field of high-pressure reactor technology. This device allows for convenient switching between stirred and non-stirred experiments and facilitates easy cleaning and maintenance of the reactor's interior, improving its performance.

This invention belongs to the field of hydrothermal liquefaction technology and discloses a method for CO2-promoted hydrothermal liquefaction demulsification and separation of rolling mill sludge. The method involves weighing rolling mill sludge into a high-pressure reactor, adding water, and introducing sufficient carbon dioxide gas to purge air from the reactor. A hydrothermal liquefaction reaction is then carried out, and the liquid phase product in the high-pressure reactor is collected and washed with acetone. The washing liquid and the liquid phase product in the high-pressure reactor are then vacuum filtered together. After washing the filter residue with acetone, a filtrate and a filter residue are obtained. The filter residue is dried to obtain the solid phase product of the reaction. Dichloromethane is added to the filtrate, and after thorough stirring and extraction, the liquid is separated. The upper layer is an aqueous solution, and the lower layer is a mixed solution of acetone, dichloromethane, and bio-oil. Rotary evaporation is used to remove the organic solvent from the oil phase mixture, yielding the oil phase. This invention improves the oil phase separation efficiency and calorific value of rolling mill sludge by using CO2 as a reaction atmosphere during the hydrothermal liquefaction process.

The present disclosure relates to the technical field of reactor, and one embodiment of the present disclosure provides a high-pressure reactor for directly recovering chemical energy to generate heat at the end of a reactor, which comprises a pair of high-pressure reactor housings, a spliced housing and a pair of conductive rods, the conductive rods are arranged in the high-pressure reactor housings and the spliced housing, the high-pressure reactor housings and the spliced housing are fixedly connected through a screw rod and a bolt, a flow blocking assembly is arranged at both ends of the high-pressure reactor housing, a filler supporting assembly is arranged between the conductive rods, a cylinder is arranged in the high-pressure reactor housing, the cylinder is externally sleeved with a blocking piece, the blocking piece is inserted with a sealing support block at both ends, and a pair of sealing support blocks are respectively supported at both ends of the cylinder. Through the above technical scheme, the technical problem of low heat transfer efficiency and large heat energy loss in the prior art that the traditional heat transfer mode is indirect heat transfer (such as jacket cooling and coil heat exchange) and heat is transferred through an intermediate medium is solved.

This invention relates to the field of electrocatalyst technology, and in particular to a chiral CoFe-based oxygen evolution electrocatalyst, its preparation method, and its application. Iron salts, cobalt salts, and chiral tartaric acid are dissolved together in N,N-dimethylformamide solvent to form a homogeneous mixed solution. Hydrazine hydrate is added to the mixed solution and thoroughly mixed. The solution is then transferred to a high-pressure reactor and subjected to a solvothermal reaction at a set temperature to obtain a nanocatalyst precursor. The nanocatalyst precursor is then subjected to centrifugation, washing, drying, and vacuum calcination to obtain the product. This method successfully prepares a chiral CoFe-based nanocatalyst through the inductive effect of chiral tartaric acid, combined with a specific solvothermal reaction and subsequent heat treatment process. This chiral CoFe-based electrocatalyst exhibits significantly enhanced catalytic activity and stability in the oxygen evolution electrocatalytic reaction, demonstrating superior electrochemical performance compared to achiral catalysts.

The present application belongs to the technical field of electric heating experimental analysis instrument, and discloses a high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device, which comprises a high-pressure gas distribution device, a high-pressure pulse sampling device, a high-temperature and high-pressure reactor and an analysis and detection device, one end of the high-pressure pulse sampling device is connected with the high-pressure gas distribution system, the other end is connected with the high-temperature and high-pressure reactor through a high-pressure sampling pipe, the high-pressure gas distribution device is connected with the high-temperature and high-pressure reactor through a high-pressure gas inlet pipe, and the analysis and detection device comprises a filter, a back pressure valve and a mass spectrum which are connected in sequence along the airflow direction. The present application can realize the separate control of temperature and pressure, the internal pressure can be real-time regulated through the back pressure valve and the gas inlet pressure relief valve, the temperature is controlled by a separate temperature control system, the two key reaction conditions of temperature and pressure are decoupled, and the thermochemical reaction analysis and measurement under various reaction conditions such as low temperature and high pressure, high temperature and low pressure and high temperature and high pressure can be realized.

A method for synthesizing high-value products from refinery furnace gas is provided. Crude furnace gas from a refinery is purified, and then clean furnace gas is delivered to a three-stage normal pressure reactor in a chemical looping, where nearly pure carbon dioxide, nitrogen, and hydrogen products are obtained in each stage of the process. Nearly pure hydrogen reformed from coke oven gas is used for hydrogen replenishment to adjust a gas structure. Mixed raw materials that meet standards are pressurized and delivered to a synthesizer, and methanol or ammonia products are obtained after gas-liquid separation.

This invention discloses a Co-doped α-MnO2 material, its preparation method, and its application in anode materials, comprising the following steps: Step 1: Dissolving potassium permanganate (KMnO4) and cobalt nitrate hexahydrate (Co(NO3)2·6H2O) in deionized water and stirring to obtain a homogeneous precursor solution; Step 2: Adding hydrochloric acid solution dropwise to the precursor solution and stirring continuously to ensure thorough mixing; Step 3: Transferring the mixed solution to a high-pressure reactor lined with polytetrafluoroethylene for hydrothermal reaction; Step 4: After the reaction, centrifuging, washing, and drying the product to obtain the Co-doped α-MnO2 material. This invention exhibits significantly improved discharge specific capacity and excellent rate performance at low current densities.

This application relates to the field of silica purification and discloses a method for extracting high-purity silica from granite waste. First, pulsed microwave irradiation is applied to the waste powder, inducing microcracks at the phase interface by utilizing the difference in thermal expansion between metal oxide impurities and the quartz matrix. The cracked powder is then placed in a microwave high-pressure reactor, where supercritical carbon dioxide is used to force a eutectic solvent into the microcracks. Continuous microwaves are input, causing dipole polarization of the eutectic solvent, resulting in in-situ polarization heating, reducing kinetic viscosity, and accelerating coordination chelation reactions to form metal complexes. Critical point phase oscillation is performed through alternating temperature and pressure, creating a hydrodynamic pumping effect within the microcracks. A pressure-reducing valve is controlled to release pressure, and a high-speed gas flow carrying impurities is used to discharge the solvent to the external surface. The product is then obtained through washing and separation. This invention effectively solves the problem of difficulty in exposing and eluting deep impurities, significantly improving product purity.

A BiO with oxygen vacancies and fluorine-rich 0.5 F 1.98 This invention relates to the synthesis method and application of photocatalytic materials, belonging to the field of perfluorinated and polyfluorinated compound (PFAS) treatment technology in water. This invention addresses the technical problems of poor adsorption selectivity for PFASs, oxygen vacancy introduction-dependent post-treatment, and low catalytic efficiency in existing photocatalytic materials. Method: Bi(NO3)3 solution and NH4F solution are mixed and reacted in a high-pressure reactor, followed by washing and drying. This invention uses an ethylene glycol / water green solvent system and a one-step hydrothermal synthesis method, requiring no expensive equipment or complex post-treatment, and featuring a simple process and mild conditions. In application, it exhibits excellent stability, anti-interference ability, and low energy consumption characteristics under pure ultraviolet light or simulated sunlight irradiation, without the need for the addition of persulfate or an external electric field, providing a promising solution for the deep treatment of PFASs in actual water bodies. The photocatalyst prepared by this invention is used for the degradation of perfluorinated and polyfluorinated compounds.

This invention relates to the field of new material preparation technology, and discloses a biodegradable membrane resin and its preparation method. The preparation method includes: (1) mixing ε-caprolactone, toluene and a catalyst to obtain an ε-caprolactone solution; (2) pumping the ε-caprolactone solution, an initiator and caprolactam into a microchannel reactor for reaction to obtain a precursor product; (3) contacting the precursor product, a diamine and a diacid in a high-pressure reactor for reaction; (4) co-extruding the product obtained in step (3) with an additive to obtain a biodegradable membrane resin. This invention uses a stepwise preparation method for process control, which can effectively improve the mechanical properties of the prepared biodegradable membrane resin, while ensuring the resin's excellent processability, biodegradability and other comprehensive properties.