118 results about "Continuous reactor" patented technology

A geothermal system including a heat-driven process system using heat extracted from a magma wellbore for driving a thermal process. The system includes a magma wellbore connected to the heat-driven process system in a closed loop. A heated heat transfer fluid conveys the heat from the magma wellbore to a reactor housing a decomposition reaction. The reactor can be a batch reactor, a continuous reactor, or a through-flow reactor. The heat provides the reaction temperature necessary for driving the decomposition reaction of a polymer to an end product. The heat can be provided directly by the heated heat transfer fluid, by an intermediate heat transfer fluid heated by the heated heat transfer fluid, or by a reaction medium heated by the heated heat transfer fluid.

The application discloses a continuous synthesis method of an amicarbazone intermediate 5-isopropyl-1,3,4-oxadiazole-2(3H)-ketone. The method comprises two continuous processes of hydrazinolysis and phosgenation: continuously feeding a mixture of isobutyric acid and a solvent, a mixture of hydrazine hydrate and a catalyst into a hydrazinolysis continuous reactor respectively, carrying out a warming reflux dehydration reaction, and obtaining an isobutyryl hydrazine solution shown in formula I; continuously feeding the isobutyryl hydrazine solution and phosgene into a phosgenation continuous reactor, carrying out a phosgenation reaction, and after distillation and desolventizing treatment of a reaction solution, obtaining 5-isopropyl-1,3,4-oxadiazole-2(3H)-ketone shown in formula II. The application has the advantages of simple reaction flow, high product yield, and significant production efficiency improvement, and is suitable for industrial large-scale production.

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

The application discloses a catalyst for preparing malononitrile, a preparation method of the catalyst and a method for preparing malononitrile by using the catalyst. The catalyst is a solid catalyst, which is an acidic catalyst loaded with rare earth metal oxide. The method for preparing malononitrile is that cyanoacetic acid or cyanoacetate or cyanoacetamide and an ammonia source are subjected to ammoniation dehydration reaction in a continuous reactor to prepare malononitrile according to a certain molar ratio. Then, vacuum distillation (20 torr-25 torr) is carried out, and a fraction collected at 110 DEG C-120 DEG C is malononitrile product. The ammonia source can be ammonia gas, ammonia water, ammonium carbonate or urea. The method for preparing malononitrile can reduce production cost, improve production safety, reduce the discharge amount of three wastes in the preparation of malononitrile by using an existing process, and improve product quality, and is a sustainable and green synthesis route.

This invention provides a photochemical continuous reactor, comprising an outer shell; the outer shell includes a reactor cavity and sealing caps independently disposed at both ends of the reactor cavity; inside the reactor cavity, a light-emitting device, a transparent sleeve, and a reaction tube assembly are arranged sequentially from the center outwards. The photochemical continuous reactor provided by this invention solves the problem of low light energy utilization in photochemical reactions and effectively realizes ultra-low temperature or ultra-high temperature photochemical production, providing important insights for addressing related difficulties encountered in photochemical production processes.

A catalyst for the direct synthesis of acetic acid and ethanol from CO2 via a non-hydrogenation route, its preparation method, and its application are disclosed. This invention belongs to the field of catalyst technology and overcomes the shortcomings of existing acetic acid synthesis technologies. The solution involves using TiO2 nanotubes as the catalyst support, and the active component being a single metal Co or Pd, or a bimetallic composition of Co and Pd, with a loading of 3-7%. wt The catalyst is prepared by first using a hydrothermal method to prepare TiO2 nanotubes, and then using the TiO2 nanotubes as a carrier, impregnating, drying, and calcining to obtain the catalyst. When applied to a dual-channel fixed-bed step-by-step continuous reactor, the catalyst enables the one-step conversion of CO2 to ethanol and acetic acid via a non-hydrogenation route at low temperature and atmospheric pressure, avoiding the problem of insufficient hydrogen source in the CO2 hydrogenation route. The process of this invention is short, the conditions are mild, it does not require a high-energy-consuming syngas production step, the product composition is simple, and the subsequent separation energy consumption is low.

The invention belongs to the field of organic chemical synthesis, and particularly relates to a synthesis method of triaryl sulfonium salt, which comprises the following steps: (1) dissolving a catalyst: dissolving the catalyst in an organic solvent in a preparation kettle in advance to form a uniform solution; and (2) continuous feeding and reaction: enabling reactants thionyl chloride and an aromatic hydrocarbon derivative and the catalyst-containing solution obtained in the step (1) to pass through a continuous reactor at a controllable flow rate, firstly carrying out Friedel-Crafts acylation reaction in an all-solvent system, then heating to carry out addition reaction, and finally obtaining the triaryl sulfonium salt. According to the invention, the problem of solid-liquid non-uniformity is eliminated, and the reaction efficiency and reproducibility are improved; the reaction is fast and uniform, and local overheating and out-of-control risks are avoided.

The utility model provides a continuous device for synthesizing 2-chloro-1-(1-chlorocyclopropyl) ethanone. The continuous device for synthesizing 2-chloro-1-(1-chlorocyclopropyl) ethanone comprises a raw material continuous supply unit, a first continuous chlorination reaction unit, a ring-opening reaction unit, a ring-closing reaction unit and a second continuous chlorination reaction unit. According to the technical scheme provided by the utility model, through the continuous synthesis device, the continuous production of 2-chloro-1-(1-chlorocyclopropyl) ethanone can be realized, and the labor cost is reduced; the continuous reactor has a relatively large heat exchange area, reaction heat can be quickly removed, accurate temperature control is realized, and the reaction selectivity is high; a gas-liquid two-phase contact interface in the continuous reactor is large, the reaction rate is high, and process amplification is easy to carry out. According to the continuous device, each reaction unit and each auxiliary unit also realize automation, and the reaction conditions are stable, so that the quality of a product prepared by the continuous device is relatively stable and uniform.

The application discloses an Ag-MoO x A preparation method of a bimetallic catalyst, an Ag-MoO x A bimetallic catalyst and application, the preparation method comprises the following steps: after a mixture containing a molecular sieve, an alkali source, a silver source and a molybdenum source is impregnated, dried and calcined, the Ag-MoO x A bimetallic catalyst; wherein the impregnation comprises the following steps: the molecular sieve and the alkali source are first impregnated and treated, and then impregnated with a solution containing the silver source and the molybdenum source, or the molecular sieve, the silver source and the molybdenum source are first impregnated and treated, and then impregnated with the alkali source. The application is greatly improved in the production efficiency of 2-methylpropenol by being matched with a continuous reactor-fixed bed. Under the condition that hydrogen is used as a reducing agent and without a solvent, the conversion rate of methylpropenal on the bimetallic catalyst reaches 82%, the selectivity of 2-methylpropenol is 89%, and meanwhile, the catalyst can be stably operated for a longer time.

The invention belongs to the technical field of organic chemical synthesis, and provides a process for producing pyromellitic dianhydride by liquid-phase oxidation, which comprises the following steps: proportionally adding durene and acetic acid into a batching kettle, matching by using a catalyst, stirring and heating a liquid material to obtain the liquid material, and adding the liquid material into the batching kettle to obtain the pyromellitic dianhydride; when a liquid material is pumped into the micro-channel continuous reactor, the flow of the liquid material pumped into the micro-channel continuous reactor needs to be obtained, pumping peak-valley analysis is carried out according to the flow of the liquid material, a pumping peak time period and a pumping valley time period are screened out, and the change types of the pumping peak time period and the pumping valley time period are identified; according to the method, the oxygen introduction strategy is formulated, the gas introduction adjustment amount is obtained, and the oxygen introduction amount is dynamically adjusted, so that oxygen introduction and liquid material pumping are highly coordinated in the time dimension, and the problems of violent reaction fluctuation or incomplete reaction and the like caused by imbalance of the gas-liquid proportion are solved.

The application provides a synthesis method of hydroxyapatite with uniform and controllable size, wherein a calcium source reaction solution is mixed with a phosphorus source reaction solution, a reaction is carried out under stirring after pH adjustment, and a particle size adjusting agent and a charge interference agent are added after the reaction is completed, so that hydroxyapatite with controllable single crystal size and uniform particle size is obtained. The application has the beneficial effect that: hydroxyapatite is synthesized by using the reactor, the liquid flow rate and the rotation speed of the reactor have great influence on the formation of particles and the uniformity of particle size distribution, controllable single crystal size and uniform particle size of hydroxyapatite can be obtained by controlling parameters such as flow rate and rotation speed, and adding additives such as particle size adjusting agent and charge interference agent, and the back mixing process can promote the size uniformity of particles. In addition, the reactor is a large continuous reactor, which can continuously sample and obtain products at the same time, and has good effect on the preparation of large-scale hydroxyapatite with limited agglomeration.

This invention provides a glow plug ignition internal combustion continuous supercritical water oxidation device, comprising three parts: an ignition zone, a reaction zone, and a separation zone. The device utilizes the heat from the glow plug to ignite fuel in the inclined reaction tube, rapidly raising the temperature in the reaction zone to the required level, achieving rapid preheating and efficient degradation of organic wastewater. Furthermore, the fuel does not require a preheater during the entire heating process, reducing equipment investment and energy consumption. The lower end of the separation straight tube is equipped with a first electric ball valve, a salt discharge pipe, and a second electric ball valve. By adjusting the opening and closing of the first and second electric ball valves, automatic salt discharge can be achieved, preventing the generation of saline wastewater and facilitating continuous reactor operation and zero discharge, thus meeting the needs of industrial-scale treatment.

The Joule thermal flash continuous reactor comprises a reaction cavity, a segmented pulse energy supply cabinet, an atmosphere and tail gas unit and a material bearing and positioning mechanism, the reaction cavity is sequentially provided with a heat-resistant insulating layer and a conductive slow-release layer from inside to outside, and the graphite boat is provided with a containing cavity. The distance between the narrow-gap multi-electrode array electrode and the side wall of the placing cavity is adjustable, the segmented pulse energy supply cabinet is connected with the reaction cavity through a connecting wire, the segmented pulse energy supply cabinet comprises a solid-state switch matrix and a plurality of energy storage capacitor sections, the solid-state switch matrix is connected with the energy storage capacitor sections, and the energy storage capacitor sections are connected with the energy storage capacitor sections. The atmosphere and tail gas unit comprises a gas inlet structure, a tail gas side taking device and a tail gas adsorption device, the material bearing and positioning mechanism comprises a position sensor, a multi-boat conveying belt and a driving part, the multi-boat conveying belt penetrates through the reaction cavity, and the two ends of the multi-boat conveying belt are located outside the reaction cavity. The Joule thermal flash continuous reactor based on the graphite boat has the advantage that the current density in the graphite boat in the thickness direction is uniform.

The invention relates to the technical field of chemical equipment, in particular to a hydroxyacetonitrile continuous reactor which comprises a first-stage falling film reactor, a second-stage mixing reactor, a first-stage circulating pipeline and a second-stage circulating pipeline, after hydrocyanic acid mixed gas enters the first-stage falling film reactor, formaldehyde and first-stage circulating liquid enter the first-stage falling film reactor from the two sides of the top of the first-stage falling film reactor respectively, and then formaldehyde and second-stage circulating liquid enter the second-stage falling film reactor; uniform falling films are formed on the inner walls of a plurality of reaction flow guide pipes and react, and cooling water outside the pipes circulates to timely remove reaction heat; after the primary reaction, returning one part of the material to the top through a primary circulation pipeline for continuous reaction, and enabling the other part to enter a secondary mixing reactor; and in the second-stage mixing reactor, the residual hydrocyanic acid is further mixed and reacted with glycolonitrile returned by a second-stage circulating pipeline, part of the final product is extracted, and part of the final product is circulated back to a second-stage circulating material inlet. The system strengthens heat and mass transfer through a falling film structure, and ensures full reaction of raw materials through two-stage circulation, and the product quality is stable.

The utility model discloses a novel continuous reactor device which comprises a tubular reactor, a first feed pipe is communicated and connected with the top of the tubular reactor close to the left side, and second feed pipes are respectively communicated and connected with the bottom of the tubular reactor close to the left side and the right side. The top end of the first feeding pipe and the bottom ends of the two second feeding pipes are respectively communicated and connected with an SK mixer, a combined SK mixer is arranged in the tubular reactor, and a heat exchange medium inlet is communicated and connected to the left side, close to the bottom, of the tubular reactor. According to the technical scheme, through mutual cooperation of the tubular reactor, the SK mixer, the combined SK mixer and other components, adding and continuous production of various materials at different time can be achieved, the SK mixer set is connected in parallel in the tubular reactor, the solution mixing and reaction efficiency is higher, the heat exchange efficiency is higher, local temperature rise is avoided, and the production efficiency is improved. And the reaction heat can be effectively utilized to supply heat to the two-stage reaction.

The present invention discloses a glycine mixed crystal intermediate production method, and relates to the technical field of glycine production, the method comprises the following specific steps: raw material mixing and heating reaction: crushed solid chloroacetic acid, crushed liquid chloroacetic acid and recovered mother liquor are added into a continuous reaction kettle together, in the continuous reaction kettle, a reaction is performed for 2-4 h, the reaction temperature of the neutralization reaction stage is controlled in a low-temperature reaction zone, and after the neutralization reaction is completed, the reaction stage of generating glycine is entered. In the crystallization process, glycine and ammonium chloride are naturally saturated and separated out in the mother liquor to generate an intermediate, so that the operation steps and the use amount of methanol are reduced, and the crystallization process is continuously completed; meanwhile, the loss of urotropin in the reaction mother liquor is extremely small, the mother liquor can be recycled, and the mixture is put into the reaction kettle again after being mixed with new solid chloroacetic acid or liquid chloroacetic acid, so that the recovery rate of glycine is increased.

Continuous spatial atomic layer deposition is performed on a particulate substrate in a continuous reactor comprising a plurality of spatially separated, precursor dosing zones and a means for moving the particulate substrate spatially through the precursor dosing zones to apply an atomic layer deposition coating thereon. The precursor dosing zones may be used simultaneously.

The invention discloses a heavy raw material lightening continuous reaction device and a method thereof, multiple raw materials are mixed and then jointly catalytically cracked, the catalytic conversion efficiency in the process of producing low-carbon olefins is further improved, and the product selectivity and yield are improved; the device comprises a continuous reactor, a separator, a gas conveying line, a solid conveying line and a crude oil conveying line, the gas conveying line and the crude oil conveying line are respectively connected with the bottom end of the continuous reactor, the solid conveying line is connected with the middle end of the continuous reactor, and the output end of the continuous reactor is connected with the separator; according to the method, crude oil is preheated and then enters a continuous reactor through a crude oil conveying line, low-carbon alkane enters the continuous reactor through a gas conveying line, solid raw materials enter a phase reactor through a solid conveying line, a catalyst enters the continuous reactor through a catalyst conveying line, a reaction is carried out for 1-4 s at the temperature of 470-700 DEG C and the pressure of 0.1-0.5 Mpa, and then a reaction product is conveyed to a separator to be separated. A target product is obtained; belongs to the technical field of heavy oil treatment.

The invention belongs to the technical field of electrolyte material preparation, and particularly relates to a method for continuously preparing lithium hexafluorophosphate. The preparation method comprises the following steps: pulping and uniformly mixing excessive liquid PF5 and solid LiF in a pulping kettle, introducing the mixed material into a continuous reactor, controlling the temperature in the reactor to be greater than 18.95 DEG C and the pressure in the reactor to be greater than 3.39 MPa so that the PF5 is in a supercritical state, carrying out stirring reaction, decompressing the reaction material, feeding the reaction material into a spray drying tower, and carrying out solid-gas separation, the solid-phase product is lithium hexafluorophosphate, and the gas-phase component is PF5 which is compressed, condensed and recycled as a reaction raw material. According to the preparation method, the supercritical PF5 serves as a reaction raw material and a heat and mass transfer carrier at the same time, the reaction efficiency can be remarkably improved, other solvents or gas phase components are not introduced, and therefore efficient and high-quality continuous preparation of lithium hexafluorophosphate is achieved.

The invention belongs to the technical field of organic fluorine compounds, and particularly provides a continuous preparation method of 3-nitro-4-cyanobenzotrifluoride, which comprises the following steps: S1, introducing 3-nitro-4-methylbenzotrifluoride, bromine and a free radical initiator into a first continuous reactor containing a brominated anhydrous solvent to generate 3-nitro-4-bromomethyl benzotrifluoride; s2, introducing the 3-nitro-4-bromomethyl benzotrifluoride obtained in the S1 and cuprous cyanide into a second continuous reactor containing a cyaniding anhydrous solvent to generate a 3-nitro-4-cyano benzotrifluoride crude product, filtering, separating out a copper-containing filter cake, and distilling the obtained filtrate to obtain the 3-nitro-4-cyano benzotrifluoride crude product; s3, carrying out regeneration cycle on the copper-containing filter cake; and S4, carrying out reduced pressure distillation on the crude product obtained in the S2 to obtain the high-purity 3-nitro-4-cyano trifluorotoluene. Through the steps, cuprous cyanide regeneration can be realized, and efficient utilization of resources is realized.

The utility model provides an isocyanate tower type continuous reactor which comprises a reaction cavity, and the reaction cavity comprises a first reaction part and a second reaction part which are sequentially arranged from top to bottom; the first reaction part and the second reaction part respectively and independently comprise at least two crossed tower plates, the tower plates are fixedly connected to the inner wall of the tower type continuous reactor, and a baffling assembly is arranged at one end of each tower plate; the tower-type continuous reactor comprises a stirring assembly, the stirring assembly comprises stirring sub-assemblies with the same number as the tower plates, and the stirring sub-assemblies are arranged above the tower plates; a liquid phase feeding hole is formed above the first reaction part, and a gas phase feeding hole is formed below the second reaction part. The tower type continuous reactor can continuously produce reaction liquid with higher concentration, the number of equipment is small, the phosgene and solvent consumption is low, and the industrial production cost is reduced.

The invention discloses a continuous reactor detection device and method, and relates to the technical field of reactor detection, the device comprises a detection table, a bottom plate and supporting frames, two compression resistance detection assemblies are symmetrically arranged above the detection table, and the two compression resistance detection assemblies are located between the two supporting frames; two groups of rolling shafts are symmetrically and rotationally connected to the top end of the detection table, a conveying mechanism used for conveying the electric reactor is arranged on the detection table, and a clamping mechanism used for clamping and positioning the electric reactor is arranged on the detection table. Through the conveying mechanism, the two reactors before and after detection can be pushed to synchronously and stably displace, so that continuous conveying of the two reactors can be realized without manual work, and the reactors can be automatically overturned to cross the reactor in place during resetting, so that pushing preparation can be made for pushing the next reactor, the detection interval time is effectively shortened, and the detection efficiency is improved. Therefore, the detection efficiency of the plurality of reactors can be further improved.

The present application relates to a method for synthesizing cyclopentadiene from a biomass platform compound cyclopentanone, which uses cyclopentanone as a raw material, and is synthesized by hydrogenation-deoxidization and dehydrogenation in series in a fixed-bed continuous reactor under the action of a composite metal oxide catalyst of A x B y O z type. The process route is simple, environmentally friendly, and the catalyst is easy to prepare, thus providing a new and effective approach for synthesizing cyclopentadiene from cyclopentanone.

The utility model discloses a photocatalytic tubular continuous reactor and relates to the field of photocatalysis. A photocatalytic tubular continuous reactor comprises a base and further comprises a double-layer quartz tube fixedly installed on the base, the double-layer quartz tube is arranged in an S shape, one end of the double-layer quartz tube is fixedly communicated with a feeding tube, and the other end of the double-layer quartz tube is fixedly communicated with a discharging tube; the sleeve is connected to the double-layer quartz tube in a sleeving manner, and the sleeve and the double-layer quartz tube are coaxially arranged; the driving assembly is arranged on the double-layer quartz tube and is used for driving the sleeve to rotate; the catalysis lamps are circumferentially distributed in the sleeve at equal intervals; according to the utility model, raw materials in the tube are illuminated from different angles, so that illumination dead angles are greatly reduced, the utilization rate of light is improved, raw material molecules can fully absorb light energy and excite more photocatalytic reactions, and not only is the photocatalytic efficiency improved, but also the yield of products and the conversion rate of reactions are improved.

The present invention relates to a system and a process for enhanced hydrogen (H₂) and short- chain fatty acid (SCFA) production using both untreated as well as thermally pretreated food waste (TCP-FW) in continuous mode. The process employs non-sacrificial, conductive, and biocompatible electrodes and optimizes the carbon-to-nitrogen (C / N) ratio of TCP-FW for improved H₂ yields. The invention minimizes CO₂ formation while maximizing H₂ and SCFA production. The process is scalable, demonstrated in a 60-L continuous reactor with an L / D ratio of 10, achieving a production rate of 260 L H₂ / day per kg COD with productivity of 10.84 L / h. This method offers a sustainable approach to low-carbon hydrogen production by utilizing municipal biogenic solid waste, reducing greenhouse gas emissions, and generating SCFA as a valuable by-product.

The invention belongs to the technical field of compound synthesis, and particularly relates to a method for continuously preparing N-hydroxysuccinimide fatty acid ester. According to the method, the EDC / NHS reaction time of the N-hydroxysuccinimide fatty acid ester is greatly shortened by utilizing the efficient'three-pass' characteristic of the microchannel continuous reactor, and under the same feeding amount, the reaction time is shortened to 8-15 minutes of continuous flow production from 6-14 hours of intermittent reaction, so that the efficient and continuous production of the product is realized, and the product yield is good (gt; the purity is high, the fatty acid raw material reaction is thorough, and the post-treatment process is simplified. Three wastes in the whole process are remarkably reduced, and the solvent recycling rate is increased.

The application discloses a catalyst for preparing sebacic dinitrile and a preparation method and application thereof, and belongs to the field of catalysis. The application of the catalyst in preparation of sebacic dinitrile is as follows: sebacic acid and urea are mixed according to a certain proportion, are sent into a continuous reactor by a solid feeder at a certain rate, react with the catalyst in the reaction tube, are removed from the reactor in a gaseous form along with fluidizing gas, and are liquefied in a receiver; the liquid-solid mixed product is subjected to extraction, liquid separation, and then is subjected to solvent removal under normal pressure and vacuum rectification to obtain a high-purity product, the conversion rate of sebacic acid is greater than 99%, and the selectivity of sebacic dinitrile is greater than 99%. The application has the characteristics of low cost, easy preparation, moderate reaction condition, avoidance of use of toxic solvents, convenience of post-treatment, high product purity and the like.

The application discloses a method for continuously synthesizing 2-methyl acetoacetate, which comprises the following steps: continuously synthesizing 2-methyl acetoacetate by sequentially feeding raw materials into a micro-channel continuous reactor, a liquid-liquid separator and a fixed bed reactor with a catalyst, wherein the raw materials comprise material A composed of methyl acetoacetate and acetic acid, and material B composed of formaldehyde and an alkaline catalyst. In the method, the continuous double-feeding mode is used, the characteristics of precise dosing of the micro-channel, step-by-step promotion without back mixing and fast reaction are combined, and hydrogenation is carried out after the reaction of the raw materials is completed, so that the problem of reduction of formaldehyde can be effectively solved, the possibility of generation of impurities is reduced from the source, and then the product content and the yield can be improved. The method has the advantages of simple operation, safety and convenience, suitability for industrial production, small equipment investment, high product purity, high yield and the like. The content of the obtained product is more than 98%, the yield is more than 97%, and the product has good market competitiveness.

The utility model belongs to the technical field of continuous reactors, and particularly relates to a continuous reactor for producing methacrylate, which comprises an instrument body and a motor, a rotating shaft is arranged at the output end of the motor, a rotating frame is fixedly mounted at the bottom of the rotating shaft, a first gear is fixedly mounted on the outer side of the rotating shaft, and a second gear is arranged on the rotating frame. A supporting column is arranged at the bottom of the second gear, and a stirrer is fixedly installed at the bottom of the supporting column. The scraper blade stirrer is installed to clean the inner wall, the motor is started and drives the rotating shaft to rotate, when the rotating shaft rotates, the rotating shaft then drives the rotating frame to rotate, the second gear on the rotating frame starts to rotate along with rotation of the rotating frame and under the interaction of the first gear, and the inner wall is cleaned through the scraper blade stirrer. The second gear rotates to drive the stirrer to rotate, then stirring is conducted in the instrument body, the stirrer is installed, reaction of reactants can be accelerated, the reaction rate can be increased, and even mixing of raw materials can be promoted.

The present invention provides a method for gas-phase synthesis of p-hydroxyanisole. The method uses a graphite-supported P-Ru-Gd catalyst to catalyze the synthesis of p-hydroxyanisole by hydroquinone and methanol under gas-phase conditions. The process uses a fixed-bed continuous reactor, wherein the reactor includes a gasification section, a reaction section and a heat preservation section. The raw materials are first fully gasified in the gasification section and then enter the reaction section containing the catalyst to react. Thereafter, the raw materials enter the storage tank through the heat preservation section and are condensed to obtain a reaction solution. The preparation method in the present invention ensures that the activity and stability of the catalyst in the reaction section are not affected, and the catalyst has the advantages of strong activity and long life.