135results about How to "Thorough response" patented technology

The invention discloses a ferric sodium pyrophosphate positive electrode material, a preparation method thereof and a battery, and relates to the technical field of batteries. Pre-sintering is performed; sanding and spray drying; and high-temperature sintering. Wherein the pH value of the reaction is controlled by using a Tris-HCl buffer solution in the hydrothermal reaction, so that the precursor is uniformly crystallized and has high crystallinity, and low-temperature segmented presintering is adopted later, so that the compaction density of the material can be controlled, and the related electrical properties of the material are relatively good. In the preparation process, a carbon source and a doping element are supplemented twice, so that carbon coating is uniform in the sintering process, the compaction density of the NFPP positive electrode material is further improved, the properties such as theoretical specific capacity of the positive electrode material are better through doping and carbon coating modification, and the high-compaction and high-capacity ferric sodium pyrophosphate positive electrode material is obtained.

The invention relates to the field of enzyme preparations, and discloses an enzyme preparation for catalytic degradation of bioplastics and a preparation method thereof, the enzyme preparation for catalytic degradation of bioplastics comprises the following components by weight: 25-50 parts of an enzyme, 1-8 parts of a catalytic additive, 2-10 parts of a stable dispersant, and 30-50 parts of a buffer solution; the catalytic additive is prepared by using calcium bentonite as a carrier to load nano titanium dioxide; the stabilizing dispersant is prepared by introducing polyethylene glycol monoallyl ether into a sodium lignin sulfonate structure by utilizing an initiator through an aqueous solution polymerization method, and by adding the catalytic additive and the stabilizing dispersant, the enzyme preparation is endowed with good degradation efficiency on bio-based plastics and the stability of an enzyme preparation system is improved.

The invention belongs to the technical field of lithium battery positive electrode materials, and provides a method for improving the performance of lithium iron phosphate through secondary calcination of iron phosphate, and the method comprises the following steps: S1, mixing iron phosphate with a dispersant to obtain a mixture; s2, the mixture is sequentially subjected to pulping, filter pressing, drying and calcination, and a first precursor is obtained; s3, sequentially mixing, filtering and drying the first precursor and a perfluorosulfonic polymer solution to obtain a second precursor; and S4, sequentially mixing, grinding and sintering the second precursor and a lithium source to obtain the lithium iron phosphate. The compaction density of the lithium iron phosphate is larger than 2.6 g / cm < 3 >, the sphericity degree is larger than or equal to 0.8, the average particle size range is 300-500 nm, the first charge gram capacity is 160-165 mAh / g, the energy density is 110-115 mWh / g, and the rate performance 1C discharge ratio is larger than 93%.

The invention discloses an in-situ synthesis Al2O3 reinforced low-density steel-based composite material and a preparation method of the in-situ synthesis Al2O3 reinforced low-density steel-based composite material. The in-situ synthesis Al2O3 reinforced low-density steel-based composite material comprises a steel matrix and an Al2O3 reinforced phase distributed in the steel matrix, the steel substrate is made of high-aluminum steel; the Al2O3 reinforced phase is generated by an in-situ reaction of an oxygen element in the metal oxide molten salt and an aluminum element in the high-aluminum steel melt in the smelting process, and the volume percent of the Al2O3 reinforced phase in the steel matrix is 10-20%. In the casting process, Al2O3 reinforced phase particles are generated in a steel matrix through in-situ reaction, good combination of the Al2O3 reinforced phase particles and the steel matrix is achieved, and the overall performance of the material is improved under the condition that the low density of the steel-based composite material is guaranteed.

The invention discloses a composite aerogel felt containing organic-inorganic hybrid hollow microspheres as well as a preparation method and application of the composite aerogel felt. The method provided by the invention adopts a normal-pressure drying preparation process and comprises the following steps: adding a silicon source, a solvent and phytic acid into water, carrying out hydrolysis reaction, and then adjusting the pH value of a system to obtain a silica sol solution; adding organic and inorganic hybrid hollow microspheres into the silica sol solution, and stirring to obtain a sol solution containing the organic and inorganic hybrid hollow microspheres; and soaking a fiber felt in the sol solution containing the organic-inorganic hybrid hollow microspheres, standing, and drying to obtain the composite aerogel felt. The composite aerogel felt provided by the invention is more stable in structure, better in heat insulation performance, free of agglomeration, free of powder falling, free of repeated washing and replacement, simpler in process and more suitable for large-scale production.

The invention discloses a nanofiber membrane material for a solid polymer electrolyte as well as a preparation method and application of the nanofiber membrane material. The nanofiber membrane material is prepared from the following raw materials: an electrostatic spinning fiber membrane and a polymer matrix, the polymer matrix comprises a polymeric monomer, a lithium salt and an initiator; the polymeric monomers comprise polyethylene glycol diacrylate and trifluoroethyl methacrylate. The room-temperature ionic conductivity, the electrochemical window and the high-temperature mechanical property of the nanofiber membrane material disclosed by the invention are all at relatively high levels in the field of solid polymer electrolyte, and the nanofiber membrane material is easy to prepare and assemble into a battery.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The invention relates to a method for directly reducing micro-fine-particle iron powder from high-purity iron ore concentrate through hydrogen-based low-temperature fluidization, belongs to the technical field of mineral processing, and mainly relates to five stages of nitrogen replacement of air, preheating dehydration, low-temperature fluidization direct reduction, inert cooling and ore grinding screening. And fluidization direct reduction at the low temperature of 570-620 DEG C into metal iron powder is achieved, efficient ore grinding is conducted on the basis, and the micro-fine-particle iron powder with the particle size D50 smaller than or equal to 3 micrometers is prepared. Compared with a conventional 800-1400 DEG C high-temperature preparation process of the reduced iron powder, the energy consumption and the material consumption are greatly reduced, and meanwhile bonding and flow loss are effectively avoided. According to the technological method, H2 serves as reducing gas, fluidized roasting is adopted, and the technological method has the advantages of being simple in technological process, free of carbon emission, high in reduction efficiency and the like.

The invention discloses a production device and method for preparing biological aviation kerosene through a hydrodeoxygenation method, the production device for preparing the biological aviation kerosene through the hydrodeoxygenation method comprises a reaction kettle, a stirring assembly is arranged in the reaction kettle, and the stirring assembly is used for stirring a reaction mixture; the stirring assembly comprises a hollow square shaft, a plurality of hollow stirring blades and a driving assembly, and the hollow square shaft is rotationally arranged at the bottom in the reaction kettle; the invention further discloses a production method for preparing the biological aviation kerosene through the hydrodeoxygenation method. The production method comprises the steps of S1, raw material pretreatment; s2, hydrodeoxygenation reaction; s3, separating a product; and S4, rectification. According to the device, hydrogen exhausted from the exhaust holes is sprayed out in all directions, so that the contact area between the hydrogen and raw materials can be increased, the hydrogen reaction is more sufficient and complete, waste is reduced, and meanwhile, the preparation efficiency of the biological aviation kerosene is also improved.

The invention discloses a preparation method of an all-solid-state cross-linked polymer electrolyte, which comprises the following steps: dissolving polyethyleneimine in a solvent, and stirring for the first time to obtain a first solution; quickly adding lithium salt into the first solution, and stirring for the second time to obtain a second solution; adding polyethylene glycol diglycidyl ether into the second solution, and stirring for 6 hours to obtain a cross-linked polymer electrolyte solution; and pouring the cross-linked polymer electrolyte solution on a polyfluortetraethylene plate, and drying to obtain the all-solid-state cross-linked polymer electrolyte. The all-solid-state polymer electrolyte membrane with a cross-linked network structure is prepared by adopting a rapid cross-linking and solution casting method, the reaction condition is mild, the efficiency is high, and the mechanical strength of the electrolyte is improved; besides, the reaction principle is based on the click reaction of amino and epoxy group, no catalyst, initiator and other impurities need to be introduced, the product is directly obtained from reactants, the reaction is thorough, the system is pure, and potential adverse effects on battery circulation are avoided.

The utility model discloses an air separation plant filtering structure easy to clean. According to the technical scheme, the air separation plant filtering structure easy to clean is characterized by comprising a screening box body, a supporting frame, a sealing cover plate, an exhaust shell, an exhaust hole, an air extracting pump, an air inlet pipeline, an ozone generator and a filtering unit. According to the air separation plant filtering structure easy to clean, air is conveyed into the screening box body through the air inlet pipeline, ozone is generated by the ozone generator and neutralized and oxidized with substances in the air, and through the filtering units designed in a layered mode, gas can be mixed more sufficiently, the reaction is more thorough, and the filtering effect is better. And the filtering unit can be quickly removed from the screening box body, so that the air filtering quality is effectively ensured.

The invention relates to the technical field of perfluorononenoxy sodium benzenesulfonate, and discloses a reaction kettle for production of perfluorononenoxy sodium benzenesulfonate, the reaction kettle comprises a support, the end face of the support is fixedly connected with a shell, the end face of one end, far away from the support, of the shell is fixedly connected with a sealing cover, and the end face of the other end of the shell is fixedly connected with a reaction kettle body. A top cover is fixedly connected to the end face of the end, close to the sealing cover, of the support, a feeding port is fixedly connected to the end face of the top cover, a discharging port is fixedly connected to the end face of the end, away from the shell, of the support, and an engine is arranged on the surface of the discharging port. When the device runs, materials needing to be used are poured into the device through the top cover and the feeding port, at the moment, in the stirring component, the engine is started to drive the output shaft to rotate, when the output shaft rotates, the periodic toothed plate can be driven to rotate, and when the periodic toothed plate rotates, the rack can be driven to run periodically; when the rack moves, the rack drives the connecting sliding plate to periodically slide along the surface of the sliding rod, and meanwhile, when the rack moves, the rack drives the transverse rod to move.

The invention provides a preparation method for preparing dibutyltin dilaurate through a solvent-free method, and relates to the technical field of chemical engineering. According to the preparation method of dibutyltin dilaurate, a predetermined amount of coconut oil acid and dibutyltin dichloride are obtained, the uniformity of a mixture is kept through stirring equipment, and sufficient contact of reactants is ensured; in the process of dropwise adding the sodium hydroxide solution, the reaction temperature is kept stable through a temperature control device; after the pH value is adjusted, separating out lower-layer saline water by using a separating funnel, and adjusting the separation speed and efficiency by controlling a valve to ensure thorough separation; obtaining a separated product, and heating the product in a vacuum environment; and after drying, filtering the product to obtain the final dibutyltin dilaurate. Dibutyltin dichloride and alkali liquor are used. The dibutyltin dichloride is liquid and is simple, convenient and safe to use, redundant solvents are not needed in the reaction process, safety and environmental protection are guaranteed, the dibutyltin dichloride is directly used as the raw material in the process, one-step reaction is achieved, and efficiency is improved.

The utility model relates to a chloroacetic acid production device for processing glycine, which is characterized in that an interlayer is arranged in the outer wall of a chlorination kettle, the side end is connected with a liquid level meter a, and a discharge pipe is arranged on the lower surface; a radar liquid level instrument, a chlorine feeding pipe, an on-line component analyzer, an on-line thermometer, an on-line hydrometer, a condensation pipe, a catalyst filling pipe and an acetic acid feeding pipe are sequentially arranged on the upper surface, the lower end of the chlorine feeding pipe is connected with a gas distributor, and the condensation pipe is externally connected with a condenser; the catalyst filling pipe is externally connected with a catalyst metering tank; a liquid level meter b is connected to the side end of the kettle body, a discharging pipe is arranged on the lower surface of the kettle body, a water supplementing pipeline is connected to the right side of the upper surface of the kettle body, a liquid inlet pipe and an online moisture measuring device are arranged on the left side of the upper surface of the kettle body, and the liquid inlet pipe is communicated with the discharging pipe; the upper end of the stirrer is connected with a stirring motor, and the lower end is connected with a frame-type stirring paddle; the utility model has the advantages of reasonable structural design and good use effect.

The utility model discloses a constant-temperature extraction tank for producing natural calcium propionate, which comprises an extraction tank for extracting calcium propionate, a heat preservation shell for preserving heat of the extraction tank, a stirring shaft for promoting the reaction rate, a driving device for driving the stirring shaft to rotate, a coil pipe for preserving heat of propionic acid mixed liquor, and a water spraying device for preventing calcium propionate from sinking to the bottom, the heat preservation shell is vertically connected to the outer side of the extraction tank, the two stirring shafts are vertically connected to a top plate in the extraction tank, the driving device is fixed to the upper portion of the top plate of the extraction tank and fixedly connected with the stirring shafts, and the coil pipe is arranged in the extraction tank and vertically connected to the inner wall of the extraction tank. The water spraying device is located in the extraction tank and fixedly connected to the bottom plate of the extraction tank, and the phenomenon that calcium propionate sinks and accumulates on the bottom plate of the extraction tank and blocks the discharge port of the extraction tank in a calcium propionate precipitation state is avoided.

The invention discloses a synthetic method of a substituted trans-dicyclohexyl alkenyl liquid crystal monomer, which comprises the following steps: reacting 4, 4 '-dicyclohexyl ketone with chloromethyl ether phosphine salt and potassium tert-butoxide at-10 DEG C to 0 DEG C to form 4, 4'-dicyclohexyl diene methyl ether; reacting with hydroxylamine hydrochloride under the action of a first catalyst to generate 4, 4 '-dicyclohexyl dioxime; under the action of a second catalyst, carrying out unilateral deprotection to generate 4-oxime 4 '-dicyclohexylformaldehyde; the preparation method comprises the following steps: reacting 4-oxime with R1BrPPh3 and potassium tert-butoxide at the temperature of 10 DEG C below zero to 0 DEG C to obtain 4-oxime 4 '-dicyclohexyl alkyl ethylene; reacting with formic acid to generate 4-formaldehyde-4 '-dicyclohexyl alkyl ethylene; the substituted trans-dicyclohexyl alkene liquid crystal monomer is prepared by reacting the substituted dicyclohexyl alkene with R2BrPPh3 and potassium tert-butoxide at the temperature of-10 DEG C to 0 DEG C to obtain a cis-trans mixture and carrying out transposition. The method comprises seven steps of reaction, transposition and purification are not needed in the early stage, transposition crystallization is only needed in the last step, and the total yield can reach 70% or above. The raw materials are cheap, easily available and low in cost.

The utility model relates to the technical field of calcium hydroxide production, and discloses an energy-saving and environment-friendly digester which comprises a frame body, moving wheels are fixedly assembled at the bottom of the frame body, a fixing rod and a partition plate are respectively installed on the outer wall of the frame body, a lifting rod is connected to the inner wall of the fixing rod in a sliding mode, and the lifting rod is connected with the partition plate in a sliding mode. A mixing bin and a secondary digester assembly are respectively arranged on the inner wall of the frame main body. According to the energy-saving and environment-friendly digester, the stirring motor can start to work by transmitting a signal through the controller, so that limestone raw materials on the inner wall of the mixing barrel can be preliminarily decomposed and digested under the rotation of the stirring blades, and are in full contact with water to form thicker lime slurry, and the limestone raw materials can be fully decomposed and digested while the rotating shaft rotates. The mounting frame can drive the scraping plate to synchronously rotate, so that the scraping plate can scrape lime slurry attached to the inner wall of the mixing barrel, the mixing barrel can be conveniently cleaned in the later period, and the situation of waste can also be effectively avoided.

The invention discloses a method for extracting lithium from coal ash through roasting pre-ultrasonic treatment assisted leaching. The method comprises the steps of ultrasonic pretreatment, alkali roasting activation, acid leaching or alkali leaching and the like. According to the invention, ultrasonic pretreatment is carried out before alkali roasting activation, that is, a mixture of fly ash and sodium carbonate is subjected to wet mixing and ultrasonic treatment after a small amount of water is added, so that the obvious effect of saving chemicals and energy is shown; therefore, a better activation effect and a better lithium element leaching rate can be obtained under the conditions of using fewer roasting additives and shorter roasting time, and circular economy and low-cost operation of extracting lithium from the fly ash are promoted. The research shows that the coal ash has very obvious potential as a feasible lithium source, and particularly, the ultrasonic pretreatment can play a very important role in optimization and expansion of industrial application of coal ash roasting leaching.

The invention relates to the technical field of chemical production, and discloses a production method of L-phenylglycine methyl ester hydrochloride, which comprises the following steps: adding absolute methanol into an esterification kettle; introducing hydrogen chloride gas; l-phenylglycine is added into the mixture; preheating the dissolving solution to 67 DEG C and carrying out esterification reaction; concentrating under reduced pressure after the esterification reaction is complete; centrifugally separating the product; and discharging, packaging and warehousing, adopting hydrogen chloride gas, introducing the hydrogen chloride gas into hydrochloric acid containing red phosphorus or phosphorous acid, reducing to remove chlorine, cooling to remove organic matters, finally drying by concentrated sulfuric acid to obtain high-purity hydrogen chloride gas, and introducing the high-purity hydrogen chloride gas into the L-phenylglycine methanol suspension to form the L-phenylglycine hydrochloride. The preparation method comprises the following steps: firstly, taking L-phenylglycine as a raw material, heating and refluxing, esterifying and dehydrating with methanol under the catalysis of excessive hydrogen chloride to obtain L-phenylglycine methyl ester hydrochloride, dehydrating water-containing methanol generated by esterification through a continuous fractionating tower, and then recycling, thereby realizing environment-friendly and economic production of L-phenylglycine methyl ester hydrochloride.

The application discloses a coal pyrolysis method and device for realizing in-situ ring-enriching modification of tar, and the method is as follows: block coal is pyrolyzed to obtain coal tar, semi-coke and pyrolysis gas; the coal tar and a ring-enriching modifier are subjected to in-situ ring-enriching modification reaction in a coal pyrolysis device under hydrogen to obtain coal tar; the in-situ ring-enriching modification reaction temperature is 200-250 DEG C, and the reaction pressure is 101-120 KPa.The coal tar obtained by the method is rich in polycyclic aromatic hydrocarbons and is suitable for being used as a processing raw material of high-density fuel.The device introduces the ring-enriching modification reaction on the basis of the coal pyrolysis, so that the coal tar is subjected to in-situ ring-enriching modification in the pyrolysis, and the obtained coal tar is more suitable for being used as the processing raw material of the high-density fuel.The pyrolysis device has the characteristics of low cost and low heat loss.

The utility model discloses caustic soda evaporation equipment, and relates to the technical field of caustic soda processing. A mounting box is arranged above the first bottom plate, a top cover is arranged at the top of the mounting box, two limiting blocks are connected to the end of the top cover, and an evaporation box is arranged in the mounting box. The driving motor drives the connecting shaft to rotate, the connecting shaft drives the stirring blade to rotate, the stirring blade drives the scraping blade to scrape caustic soda on the inner wall of the evaporation box, the movement of the scraping blade can prevent materials from being deposited in a stirring container or attached to the wall of the container, and the scraping blade scrapes liquid and the materials from the wall of the container. The opportunities of deposition and scaling are reduced; and the movement and stirring of the liquid can be increased, so that the mixture is more uniformly dispersed and mixed, and the materials are prevented from being deposited in the stirring container or attached to the wall of the container.

The invention relates to a slurry stirring and mixing device and a using method thereof, and the slurry stirring and mixing device comprises a mixing container, a slurry storage container for storing slurry, a glue solution storage container for storing a glue solution prepared from a treating agent, and a stirring mechanism arranged in the mixing container, and further comprises a slurry pump, the slurry pump is used for continuously and uniformly conveying the slurry in the slurry storage container into the mixing container; the piston mechanism is used for continuously and uniformly conveying the glue solution in the glue solution storage container into the mixing container; the water wheel mechanism comprises a water wheel shell arranged on the mud guide pipe and water wheel blades rotationally connected to the interior of the water wheel shell; the slurry and the glue solution are continuously and uniformly conveyed into the mixing container, the stirring mechanism stirs and mixes the glue solution and the slurry in the mixing container, the mixing mode that the glue solution is directly added into the slurry is avoided, the treatment agent reacts more completely, and then more dispersed and uniform drilling fluid is obtained.

The invention discloses a preparation method of ethylhexyl palmitate, and relates to the technical field of ethylhexyl palmitate. According to the method, firstly, isooctanol is gasified and then introduced into a methyl palmitate solution, ethylhexyl palmitate is prepared through transesterification, gaseous feeding can improve the instantaneous concentration of alcohol in a liquid phase, the reaction is promoted to be carried out in the positive direction, the reaction rate is increased, meanwhile, methanol generated through the transesterification method can be gasified and taken out of a system, and the yield of ethylhexyl palmitate is increased. Forward proceeding of the reaction is further promoted, so that the reaction is more thorough; secondly, chromium salt is used as a metal source precursor and a 2-sulfo-4, 4 '-biphenyldicarboxylic acid ligand to synthesize a catalyst, a biphenyl group in the ligand provides rigid and hydrophobic large pore channels and provides a local high-concentration reaction environment, gaseous isooctanol can be easily diffused into the pore channels of the catalyst and is in contact with enriched methyl palmitate, and the reaction efficiency is improved; and sulfonic acid groups uniformly distributed in the ligand serve as solid superacid, strong acid sites are provided, and the production efficiency is improved.

The invention relates to the technical field of wastewater treatment, and discloses an anaerobic bioreactor, which comprises: a reaction shell; the reaction shell is hollow, a reaction space is formed in the reaction shell, the reaction shell is provided with a liquid inlet, a liquid outlet, an air outlet, a circulating inlet and a circulating outlet, the liquid inlet, the liquid outlet, the air outlet, the circulating inlet and the circulating outlet are all communicated with the reaction space, the liquid inlet and the circulating inlet are formed in the bottom of the reaction shell at intervals, and the circulating inlet is communicated with the circulating outlet. The gas outlet and the liquid outlet are formed in the top of the reaction shell at intervals, and the circulating outlet is formed between the liquid inlet and the gas outlet; the liquid inlet is used for introducing mine acid wastewater, the liquid outlet is used for discharging treated wastewater, the gas outlet is used for discharging treated waste gas, and the circulating outlet and the circulating inlet can be communicated through a pipeline. As the circulating outlet and the circulating inlet are arranged, the contact frequency of the wastewater and the sulfate reducing bacteria is increased, and the reaction is more thorough. The structure is simple, construction cost is low, and maintenance is easy.

The utility model relates to the technical field of aluminum phosphide inspection, and provides an inspection device for producing aluminum phosphide powder, which comprises a detection reaction mechanism, a recovery mechanism and a box body, the detection reaction mechanism comprises a motor, the motor is arranged in the box body, and the recovery mechanism is arranged in the box body. The output end of the motor is connected with a rotating shaft which is coaxially arranged through a coupler, materials needing to be detected are placed in the first funnel through the arrangement of the motor, the spraying head and other structures, the materials fall into different funnels to be detected according to the sizes of the materials through the arrangement of the filter screens from top to bottom and from large to small, the motor is started, and the materials can be conveniently detected. According to the technical scheme, the funnel rotates, the spraying head rotates reversely, the materials react more completely, the detection result is more accurate, and the problems that in the prior art, the detection effect is poor, and the waste discharging efficiency is poor are solved.

The invention relates to the technical field of landfill leachate treatment, and discloses a landfill leachate full-quantitative treatment method and an electrocatalytic oxidation device thereof.The landfill leachate full-quantitative treatment method comprises the following steps that pretreatment is conducted, and landfill leachate raw water enters a regulating reservoir to be subjected to homogenization and primary hydrolytic acidification; meanwhile, large-particle substances and suspended matters in the landfill leachate are removed; biochemical treatment: the pretreated leachate enters a biochemical system to be subjected to biochemical treatment, so that the leachate is subjected to deamination and dephosphorization, and easy organisms and organic matters are degraded; membrane treatment: enabling the leachate subjected to biochemical treatment to pass through a membrane filtration system so as to intercept organic pollutants and salt in the leachate, and discharging the produced water after the produced water reaches the standard; and concentrated solution treatment: enabling the concentrated solution generated in the membrane filtration system to enter an electrocatalytic oxidation device for electrocatalytic oxidation, then discharging the concentrated solution with the effluent reaching the standard, and enabling the concentrated solution with the effluent not reaching the standard to flow back to the biochemical system to participate in treatment again. According to the invention, the efficiency of landfill leachate treatment can be improved.

The utility model relates to the technical field of experimental equipment, in particular to a boron trifluoride gas experimental device which comprises a reaction kettle, a condenser, a first purification tower, a second purification tower, a third purification tower and a gas buffer tank which are sequentially connected through gas pipelines. The reaction kettle is composed of a speed reducer, a stirring paddle, a kettle cover and a kettle body, a cavity is formed in the kettle body, a jacket is arranged outside the cavity, a heat preservation layer is arranged on the outer wall of the jacket, and a gas inlet and outlet is formed in the tail end of a gas pipeline on one side of the top of the gas buffer tank. According to the boron trifluoride gas experimental device, the temperature control in the reaction process is more accurate and stable due to the design of the jacket and the thermal insulation layer of the reaction kettle, so that the reaction efficiency is improved, the reaction speed and efficiency are further improved, impurities and particulate matters in boron trifluoride gas are effectively removed, and the purity of the gas is remarkably improved.

The utility model relates to the technical field of catalytic hydrogenation reaction equipment, and discloses a sulfolane catalytic hydrogenation reaction device for sulfolane synthesis, which comprises a reaction tank, four support columns fixedly mounted at the bottom of the reaction tank, a mounting plate fixedly mounted among the four support columns, a feeding pipe fixedly mounted at the top of the reaction tank, and a feeding pipe fixedly mounted at the bottom of the reaction tank. A discharging pipe is fixedly mounted at the bottom of the reaction tank, a reaction mechanism is arranged in the reaction tank, a sealing mechanism is arranged at the top of the reaction tank, and three driven gears are meshed with a driving gear to drive the three stirring rollers to rotate while the three stirring rollers rotate, so that the stirring is more thorough, and the reaction is more sufficient; a rotating rod and a scraper blade are matched to rub the inner wall of the reaction tank, raw materials are prevented from being adhered to the inner wall of the reaction tank, the reaction is more thorough, and the two sealing sleeves are mounted under the action of bolts B, so that hydrogen is kept sealed when entering a hydrogen injection pipe, and hydrogen leakage is avoided.

The invention relates to the field of organic synthesis, and discloses a preparation method of a flufenoxuron intermediate. According to the preparation method disclosed by the invention, 3-fluoro-4-acetaminophenol and 3-chloro-4-fluorobenzotrifluoride are taken as reaction raw materials, and an isomer impurity 4-(5-trifluoromethyl-2-chlorophenoxy)-2-fluoroaniline which is difficult to separate is not generated. When the Williamson reaction is carried out, the No.4 site of the 3-chloro-4-fluorobenzotrifluoride is a fluorine element, so that the 3-fluoro-4-acetaminophenol can be better positioned and then substituted, the reaction efficiency is higher, the reaction is more complete, and the yield is higher. The purity of the product 2-fluoro-4-(2-chloro-4-trifluoromethylphenoxy) acetanilide (an intermediate of the target product 4-(4-trifluoromethyl-2-chlorophenoxy)-2-fluoroaniline) in the step is higher, and the purity of the target product 4-(4-trifluoromethyl-2-chlorophenoxy)-2-fluoroaniline is finally improved.

The utility model discloses an ammonium sulfate crystallization reactor which comprises a main reaction tank and a reflux reaction tank, a first bubble breaker is arranged in the main reaction tank, and reactant ammonia gas enters the first bubble breaker through a gas inlet pipe; the first bubble breaker is used for breaking ammonia gas into micron-scale micron-scale bubbles and outputting the micron-scale bubbles into the main reaction tank to be mixed and reacted with liquid acid liquor to generate ammonium sulfate, so that the crystallization reaction efficiency is higher; the air pump works, so that the adsorption cover has negative pressure inside, and redundant unreacted ammonia gas is adsorbed by the adsorption cover and enters the second bubble breaker along the connecting pipe; the second bubble crusher crushes the ammonia gas to form micron-sized bubbles and outputs the micron-sized bubbles into the reflux reaction tank after crushing is completed to be mixed with liquid acid liquor to react to generate ammonium sulfate, the arrangement of the two tanks ensures that the ammonia gas reacts relatively completely, raw material waste is avoided, the generated waste gas is less, and the production cost is reduced. The subsequent tail gas treatment pressure is reduced.