47results about How to "Avoid thermal decomposition" patented technology

The invention discloses an isavuconazole sulfate freeze-dried powder injection for injection, and belongs to the technical field of pharmaceutical preparations. The isavuconazole sulfate freeze-dried powder injection for injection is prepared from 70 to 80 weight percent of isavuconazole sulfate and the balance of excipient. By controlling the excipients to be sorbitol and cane sugar and controlling the mass ratio of the sorbitol to the cane sugar to be 1: (3-5), the problem that individual impurities grow rapidly and even exceed the limit after an intermediate product liquid medicine is placed at normal temperature for several hours is solved, the moisture content is controlled to be 0.06% or below after freeze-drying, and the problems that in the prior art, a freeze-dried product is high in moisture and rapid in impurity growth are solved; in addition, the freeze-dried powder injection is short in redissolution time and has remarkable advantages.

The invention relates to a polyether type high-flame-retardant halogen-free TPU material and a preparation method thereof, and belongs to the technical field of high polymer materials. Boron-containing polyethylene glycol and phosphorus-containing isocyanate are selected as synthetic raw materials of the polyether type TPU material, carboxylated silicon dioxide and aminated graphene are introduced at the same time, all the components have a synergistic effect, the tensile strength of the polyether type TPU material is effectively improved, and meanwhile the polyether type TPU material is endowed with good heat resistance and flame retardance.

The invention belongs to the technical field of lithium carbonate conveying devices, and discloses a lithium carbonate producing, processing and conveying device which comprises a treatment bin and further comprises a dehumidifying structure arranged on the outer side of the treatment bin and used for dehumidifying air in an inner cavity of the treatment bin. The cold air cooling structure is arranged on the outer side of the treatment bin and used for preventing materials in an inner cavity of the treatment bin from being overheated, and the scattering and dredging structure is arranged in the inner cavity of the treatment bin and used for scattering the materials. Moisture in air is absorbed through moisture-proof particles in an inner cavity of a moisture removal box, so that dry cold air enters an inner cavity of a treatment bin to cool internal materials, the materials are prevented from being affected with damp, meanwhile, when a rotating disc rotates, the inner cavity of the moisture removal box can be automatically supplemented through overturning of a conveying plate, and the drying efficiency is improved. And the moisture-proof particles are stirred through the carding rod, so that the moisture-proof particles are prevented from caking, the moisture-proof particles are mutually displaced, and the water absorption of the moisture-proof particles is improved.

The invention relates to the technical field of circuit board processing, in particular to an efficient environment-friendly acidic degreaser and a preparation method thereof. An efficient environment-friendly acidic degreasing agent is prepared from the following preparation raw materials in parts by mass: 30-40 parts of inorganic acid, 12-15 parts of a corrosion inhibitor, 40-50 parts of a wetting agent, 10-12 parts of an emulsion stabilizer, 8-10 parts of isoeugenol, 15-18 parts of plant degreasing liquid and 850-870 parts of deionized water. The efficient and environment-friendly acidic degreaser has a rapid and excellent degreasing effect, can effectively protect metal on the surface of a circuit board and improve the binding force of a plating layer, has the characteristics of good high and low temperature stability, environmental protection, simple preparation method, low production cost, excellent comprehensive performance and the like, and is suitable for electroplating acidic degreasing procedures of various circuit boards.

The invention relates to the technical field of plastic modification processing, in particular to a high-electric-conductivity and high-heat-conductivity reinforced polyphenylene sulfide compound based on black talcum powder filling. The PPS compound is a PPS composite material filled with black talcum powder coated on the basis of a high-conductivity composite system, and the PPS compound is prepared from the following components in percentage by mass: 75.0 to 86.0 weight percent of PPS resin, 10.0 to 21.0 weight percent of black talcum powder coated by the high-conductivity composite system, 2.0 to 3.0 weight percent of ferric trichloride powder, 0.5 to 1.0 weight percent of dispersing agent, 0.1 to 0.15 weight percent of main antioxidant and 0.1 to 0.15 weight percent of auxiliary antioxidant. The black talcum powder is coated with a high-conductivity composite system, an electronic path is established between an internal graphite layer and an external coating layer, and when the high-conductivity composite system is used for PPS filling modification, not only is the strength, modulus, rigidity, surface hardness and dimensional stability of PPS improved, but also the conductivity and thermal conductivity of PPS can be remarkably enhanced, and therefore the effect of achieving two purposes at a time is achieved.

According to the preparation method of the high-temperature-ablation-resistant heat-insulation aerogel, a plasticizer polyethylene glycol is introduced into a graphene and silicon dioxide dispersion liquid for composite film laying, then a solvent plasticizing foaming technology is utilized for preparing the composite aerogel, and the prepared aerogel has the ablation-resistant function and the excellent heat insulation function; and meanwhile, the material has the advantages of light weight, good compression resilience and the like, and can be repeatedly used by maintaining the original shape and performance at high temperature. The scheme has the advantages of simple process, controllable process, low reaction conditions, suitability for industrial production and the like.

This application discloses an acetaldehyde recovery device and method in the production of 1,3-butanediol, belonging to the field of fine chemicals. The device includes: a feed pump, a preheater, a distillation column, a falling film reboiler, a bottom circulating pump, a bottom cooler, a top primary condenser, a reflux ratio distributor, a top secondary condenser, a top product tank, a top transfer tank, a bottom product tank, a bottom transfer tank, a vacuum condenser, a vacuum pump inlet separator, a high vacuum unit, and a vacuum pump outlet separator. The horizontal condenser is directly installed at the top of the distillation column, giving it advantages such as simple structure, convenient operation, low pipeline loss, and high vacuum. A method for acetaldehyde recovery in the production of 1,3-butanediol using this device is also disclosed. Compared to existing technologies, this invention uses falling film evaporation combined with vacuum deep cooling, which avoids the thermal decomposition of 3-hydroxybutyraldehyde and achieves low-temperature, high-efficiency acetaldehyde recovery. It is suitable for continuous production.

The utility model discloses aerogel raw material crushing equipment which comprises a crushing mechanism, and the surface of the crushing mechanism is sleeved with a cooling mechanism. The crushing mechanism comprises a crushing tank, a rotating rod is rotationally connected to the interior of the crushing tank, a plurality of crushing blades are mounted on the surface of the rotating rod, and a conical crushing frame is mounted at the bottom of the rotating rod; the cooling mechanism comprises a cooling sleeve arranged on the surface of the smashing tank in a sleeving mode, a spiral circulation cavity is formed in the cooling sleeve, and a liquid injection pipe and a backflow tank are installed on the cooling sleeve. The aerogel raw material crushing device has the advantage of being good in protection performance, and the problems that in the using process of existing aerogel raw material crushing equipment, the processing temperature in the crushing equipment is inconvenient to reduce, the temperature of aerogel raw materials is likely to be high in the crushing process, a porous structure in the aerogel raw materials is damaged, and the aerogel raw materials cannot be crushed easily are solved. And the material protection effect of the aerogel raw material crushing equipment is reduced.

The invention discloses a drying device and a drying method for sodium pyrophosphate production, and relates to the technical field of material drying, the drying device comprises a rack, a heating bin, a rotating shaft and a plurality of paddle assemblies, the heating bin is erected on the rack, the rotating shaft is arranged in the heating bin in a penetrating mode and is in running fit with the heating bin, and the paddle assemblies are arranged on the rack; the rotating shaft is of a hollow structure, one end of the rotating shaft is open, the other end of the rotating shaft is connected with a driving assembly, the paddle assembly is arranged on the rotating shaft in a staggered and penetrating mode, the paddle assembly comprises a through pipe and a scraping plate, and the scraping plate is fixed to one end of the through pipe, is attached to the inner wall of the heating bin in a radian mode and is used for scraping materials attached to the inner wall of the heating bin. The through pipe is a hollow pipe, the end, stretching into the rotating shaft, of the through pipe is provided with an opening, a plurality of air holes are formed in the circumference of the through pipe, and a screen is arranged at the air holes and used for preventing materials from entering. The thermal decomposition condition caused by heat accumulation in the blocky materials can be effectively avoided, and the purity of finished products is improved.

The present invention discloses a high-toughness, flame-retardant non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabric preparation. The present invention is used to solve the technical problem that the preparation process of non-woven fabric materials in the prior art is complicated, and the toughness and flame-retardant properties of non-woven fabrics need to be further improved. A high-toughness, flame-retardant non-woven fabric is obtained by alternately stacking polyurethane spinning membranes and composite polyester spinning membranes to obtain a multilayer spinning membrane with upper and lower surface layers being polyurethane spinning membranes, and then steam hot rolling the multilayer spinning membranes. The present invention synthesizes a composite polyurethane having polyethylene glycol and polysiloxane segments, and then modifies it to prepare a polyurethane fiber membrane, and then stacks it layer by layer with a composite polyester spinning membrane composed of modified polysiloxane and polyethylene terephthalate to prepare a composite non-woven fabric, which not only effectively simplifies the preparation process of the non-woven fabric, but also improves the breaking strength, tensile properties and flame-retardant properties of the non-woven fabric material.

The invention provides an optical module and a welding method applied to the optical module. The optical module comprises a circuit board, a first device and a second device. A first bonding pad and a second bonding pad are formed on the surface of the circuit board. A first connecting layer is arranged on the surface of the first bonding pad. The first device is fixed on the surface of the first connecting layer through welding, so that the first device is fixed on the surface of the circuit board. A second connecting layer is arranged on the surface of the second bonding pad. One end, close to the second connecting layer, in the second bonding pad contains a permeable layer; and the permeable layer comprises a second welding medium. It can be seen that the components of the second bonding pad and the second connecting layer both comprise the second welding medium, so that the fusion performance at the interface position between the second bonding pad and the second connecting layer is high, the chemical bonding force is large, the situation that cracks appear at the interface position between the second bonding pad and the second connecting layer is reduced, and the service life of the second bonding pad and the second connecting layer is prolonged. And the welding connection force between the second bonding pad and the second connection layer is ensured, so that the welding quality of the second device is improved.

The invention provides a lithium ion battery and a power utilization device, and an electrolyte of the lithium ion battery comprises 12 wt%-18 wt% of LiPF6, 3 wt%-6 wt% of fluoroethylene carbonate, 0.1 wt%-0.5 wt% of vinylene carbonate, 0.5 wt%-1.5 wt% of lithium difluorophosphate, 0.4 wt%-0.8 wt% of a cyano-containing nitrile organic compound, and the balance of a solvent; wherein the total weight percentage of the nitrile organic compound and the lithium difluorophosphate is 1-2wt%, and the total weight percentage of the nitrile organic compound and the lithium difluorophosphate is 1-2wt% through a Fourier transform infrared spectroscopy test. The intensities IA and IB of characteristic absorption peaks centered on a wave number of 875-885 cm <-1 > and a wave number of 835-845 cm <-1 > and the intensities IC and ID of characteristic absorption peaks centered on a wave number of 725-735 cm <-1 > and a wave number of 710-720 cm <-1 > satisfy 5% < = IA / IB < = 25% and 25% < = IC / ID < = 50%. Through the improvement of the electrolyte composition of the lithium ion battery and the parameter limitation of a specific characteristic absorption peak in an infrared spectrum test, the cycle performance and the safety performance under a high-rate charging or discharging working condition can be obtained, the heating phenomenon of the battery is reduced, and the capacity fading of the battery is delayed.

The invention relates to the technical field of evaporative crystallization and drying, and discloses continuous reactive crystallization and drying equipment which comprises a rack, a processing mechanism and a drying mechanism assembled on the rack are arranged on the rack, and a hot-air blower included in the drying mechanism generates high-temperature airflow to blow crystals in a filter part so as to accelerate the drying rate of the crystals; after the solution reaches a supersaturated state, crystals are separated out between the filtering piece and the partition plate, a first motor is started while heating is conducted through an electric heating wire, an output shaft of the first motor is matched with a clamping block to drive a center shaft to rotate, the center shaft drives a stirring piece to stir the solution when rotating, and heat transfer in the solution is promoted; the heat is more uniformly distributed in the whole solution, the local temperature difference is favorably eliminated, the thermal decomposition or bumping phenomenon caused by local overheating of the solution is prevented, and the uniform heat distribution can accelerate the volatilization speed of solute, shorten the evaporation time and improve the crystallization efficiency.

The invention discloses a modification method of nano zinc oxide and colored asphalt, and belongs to the technical field of asphalt modifiers. In order to improve the oxidation resistance and high and low temperature performance of colored asphalt in the prior art, the viscosity of the asphalt is possibly increased due to the added nano modified material. Modification of the nano-zinc oxide comprises the following steps: 1) performing low-temperature plasma surface treatment on the nano-zinc oxide; (2) adding nano-zinc oxide into a polyacrylamide aqueous solution with the weight concentration of 0.5-1% at the rotating speed of 4000-6000 rpm, and stirring for 30-60 minutes; and 3) separating, washing and drying to obtain the modified nano zinc oxide. The number of functional groups on the surface of the nano zinc oxide is increased, the problem that the nano zinc oxide is difficult to disperse due to increase of the number of the functional groups is solved, the viscosity of the asphalt is prevented from rising after the asphalt is added, the high-temperature performance and the anti-aging performance of the colored asphalt can be improved, the elastic performance of the modified colored asphalt can be improved, and the low-temperature self-healing performance of the modified colored asphalt can be improved.

The application discloses a kind of to promote the baking process of grade tobacco quality in Yunyan 87, including the following steps: furnace, yellowing period, color fixing period, dry tendon period and grading screening;The baking process is controlled using the linear heating rate of 0.9~1.2℃ / h throughout;The dry tendon period uses moderate reduction dry tendon stage dry ball baking temperature, avoids the thermal decomposition and volatile loss of tobacco heat-sensitive aroma precursor caused by high-temperature long-time dry tendon baking, effectively retains the internal aroma active substance of tobacco.At the same time, the application clearly distinguishes the high-temperature layer and low-temperature layer of airflow ascending and airflow descending type curing barn, and standardizes the key links such as tobacco harvesting maturity, pole coding and furnace loading density, and rain day tobacco pretreatment, so that the upper and lower layers of whole kiln tobacco are evenly dried, the color is consistent, and the oil content is sufficient.

The utility model discloses a uniform feeding mechanism of a screw extruder, which relates to the technical field of extruders and comprises a screw feeder connected with a feed port of the extruder, a low-speed mixer connected with a feed port of the screw feeder and a high-speed mixer connected with a feed port of the low-speed mixer. The low-speed mixer comprises a discharge valve I, a storage bin, a low-speed mixing stirrer and a low-speed driving motor; the high-speed mixer comprises a discharge valve II, a mixing bin, a high-speed mixing stirrer and a high-speed driving motor; and the high-speed mixer, the low-speed mixer and the screw feeder are sequentially distributed from top to bottom. According to the utility model, the screw feeding machine, the low-speed mixer and the high-speed mixer are arranged, the high-speed mixer is responsible for full mixing, the low-speed mixer is responsible for uniform cooling, and then the screw feeding machine is used for continuously and stably conveying materials to the extruder, so that the materials are uniformly cooled and continuously and stably discharged after being mixed at a high speed.

The utility model discloses a pressure-bearing sealed melt filtering device, which relates to the technical field of melt filters and comprises a body, a medium melt channel is arranged on the body, a feed port and a discharge port are respectively arranged at two ends of the body corresponding to the medium melt channel, and a reciprocating filtering mechanism is movably arranged on the body corresponding to the medium melt channel along the radial direction. The reciprocating filtering mechanism comprises a reciprocating plate which can be movably inserted into the body, the reciprocating plate is connected with a power execution element, a filtering element is arranged at the position, corresponding to the medium melt channel, of the reciprocating plate, and dynamic pressure-bearing sealing structures are arranged at the positions, corresponding to the two sides of the reciprocating plate, in the medium melt channel. The dynamic pressure-bearing sealing structure comprises a movable sealing ring and a static sealing ring which are oppositely arranged on the two sides of the reciprocating plate, and the two faces of the reciprocating plate are completely attached to and make contact with one end face of the movable sealing ring and one end face of the static sealing ring. The dynamic pressure-bearing sealing structure is matched with the reciprocating filtering mechanism, and it can be guaranteed that the device has good sealing performance, reliability and stability under the action of high-pressure melt.

The invention provides an optical cable coating material preparation process which comprises the following steps: dissolving a dispersant polyvinyl alcohol (PVA) in deionized water to form a pretreatment solution; under the protection of inert gas, monomer vinyl chloride (VCM) is added into the pretreatment solution, and a stable dispersion system is formed; adding an initiator potassium persulfate (KPS) to promote a polymerization reaction; the invention relates to the technical field of synthesis of high polymer materials, in particular to a PVC (polyvinyl chloride) composite stabilizer, which effectively inhibits thermal decomposition of PVC in the processing process, prolongs the processing temperature range, reduces generation of HCL (hydrogen chloride) and remarkably improves thermal stability by adding a calcium-zinc composite stabilizer and a composite stabilizer of nano silicon dioxide after the polymerization reaction is completed. The prepared cable sheath polyvinyl chloride is more suitable for cable application in a high-temperature environment, and by adding the nano silicon dioxide, not only is the mechanical strength of the PVC improved, but also the impact resistance and the flexibility of the PVC are improved, and large-scale production is easy.

The utility model belongs to the technical field of separation devices, and particularly relates to a dioctyl terephthalate distillation system which comprises a distillation tower, a plurality of tower plates arranged in the distillation tower, a heat exchanger connected to the bottom of the distillation tower, a product storage tank connected to the top of the distillation tower and a stirring assembly arranged in the distillation tower, the stirring assembly comprises a stirring paddle and a spiral stirrer, the stirring paddle is located at the bottom of the distillation tower, a plurality of corrugated plates and a plurality of flow guide covers are arranged in the distillation tower, the corrugated plates are located above the flow guide covers, and the flow guide covers are located above the stirring paddle. According to the utility model, the space in the distillation tower is divided into three parts according to functions, and each section adopts a proper internal component, so that the optimization of the distillation effect is realized.

The invention discloses a flexible ferroelectric material, a preparation method and application thereof, and belongs to the technical field of materials.The preparation method comprises the steps that ultrapure water is added into a reactor, polyvinyl alcohol and poly (1, 3-propylene glycol) are added at the same time, then the reactor is heated until the polyvinyl alcohol and the poly (1, 3-propylene glycol) are completely dissolved, and a first mixed solution is prepared; cooling the first mixed solution, adding the organic mixed solution into the first mixed solution, and uniformly mixing to obtain a second mixed solution; carrying out heat preservation on the second mixed solution, carrying out first reaction treatment, heating the second mixed solution after the first reaction is completed, and carrying out second reaction treatment; after the second reaction treatment is completed, cooling the second mixed solution to room temperature. The preparation method disclosed by the invention has the characteristics of relatively low temperature range and mild reaction process, and avoids the influence of a high-temperature environment on thermal decomposition or structural change of the material.

The invention relates to a casting inner runner precoated sand mud core coating and a preparation method thereof, and relates to the technical field of precoated sand casting, the casting inner runner precoated sand mud core coating comprises the following components by mass: 5-10 parts of phenolic resin, 12-15 parts of a composite binder, 3-5 parts of a dispersant, 1-2 parts of an antifoaming agent, 20-30 parts of zircon powder, 5-10 parts of a fireproof filler, and 20-30 parts of a solvent; the composite binder comprises aluminum dihydrogen phosphate and water glass. The preparation method comprises the following steps: dispersing phenolic resin into a solvent, and stirring until the phenolic resin is completely dissolved to obtain a phenolic resin solution; adding the composite binder into the phenolic resin solution, heating and stirring to obtain a binder solution; adding a dispersing agent and a defoaming agent into the binder solution, and stirring to obtain a mixed solution; and adding zircon powder and a refractory filler into the mixed solution, and stirring after ball milling to obtain the casting inner runner precoated sand core coating. The coating has the effects of improving the adhesion performance and the thermal stability, the defect rate of castings can be reduced, and the quality of the castings is improved.

The invention belongs to the technical field of dimethylacetamide recovery, and particularly relates to a recovery mechanism and method for headspace solvent dimethylacetamide production, the recovery mechanism comprises a reaction kettle, and a recovery tank is arranged in the reaction kettle. When a fire occurs around, air in a U-shaped ring groove is heated and expanded to push a piston to move upwards, a plurality of ejector rods are driven to move together, the bottom of an overturning strip is pushed in the direction close to a plurality of drying holes, the drying holes are blocked, the lower portion of the inner wall of the overturning strip pushes a push rod to move in the direction close to a valve rod along the inner wall of a guide hole, and the valve rod is closed. The whole valve rod is pushed upwards, the valve rod moves upwards, the plug is driven to move upwards, the valve rod is uncovered from the top of the filling guide hole, liquid nitrogen in the liquid nitrogen gas cylinder is gasified and enters the distributing valve through the filling guide pipe and the filling guide hole, then the liquid nitrogen is sprayed out of the distributing valve through the distributing holes, and the sprayed liquid nitrogen enters the heat insulation ring cavity. The heat insulation effect is achieved, and dimethylacetamide is prevented from being burnt at high temperature to be subjected to thermal decomposition.

The present invention provides a compound, an organic element material, an ink composition, an organic electroluminescent element, a display device, and a lighting device. By condensing a cycloalkane with a polycyclic aromatic compound, the selection of organic element materials such as organic EL element materials is increased. The polycyclic aromatic compound is formed by linking a plurality of aromatic rings using boron atoms and oxygen atoms. In addition, by using a novel cycloalkane condensation polycyclic aromatic compound as an organic EL element material, an organic EL element with excellent luminous efficiency or element life is provided.

This invention relates to the field of flame-retardant polymer materials technology, specifically a process for preparing high-temperature flame-retardant PC / ABS alloy resin modified with maleic anhydride-grafted POE. The modification of PC / ABS alloys to achieve high heat resistance and halogen-free flame retardancy often presents the technical challenge of synergistically improving heat resistance, toughness, and flame retardancy. This invention employs a synergistically optimized preparation process. A specific step-feeding melt-blending extrusion strategy is used, where PC and heat-resistant ABS, with maleic anhydride-grafted POE as the core compatibilizer, are melt-blended. After sufficient plasticization and the initial formation of a stable phase structure, a heat-sensitive halogen-free phosphorus-based flame retardant and an anti-dripping agent are injected. This avoids premature decomposition and failure of the flame retardant at high temperatures, ensures sufficient reaction of POE-g-MAH at the PC / ABS phase interface, optimizes the dispersed phase morphology, enhances the low-temperature impact toughness and stress cracking resistance of the PC / ABS alloy resin, and solves the material brittleness problem caused by the introduction of flame retardants.

The utility model discloses a PVC electric power pipe plastic production material drying device which comprises an inner barrel and an outer barrel, the inner barrel and the outer barrel are coaxially arranged, a plurality of filter holes are formed in the inner barrel, a transmission mechanism is arranged between the inner barrel and the outer barrel, an air inlet pipe is arranged in the center of the top of the inner barrel, the lower end of the air inlet pipe is communicated with the interior of the inner barrel, and the upper end of the air inlet pipe is communicated with the interior of the outer barrel. A heating wire is arranged in the air inlet pipe, a draught fan is arranged at the position, located above the heating wire, of the air inlet pipe, the draught fan is arranged on the outer barrel, external air is conveyed into the inner barrel through the air inlet pipe through the draught fan, the air is heated through the heating wire during conveying, and hot air flow is formed and enters the inner barrel to dry production raw materials. Meanwhile, by matching with the condition that the inner barrel drives the production raw materials to rotate at a high speed, the contact area between the production raw materials and hot air flow is effectively increased, the drying efficiency is further improved, and the situation that in the prior art, due to direct heating of an electric heating strip, local overheating is easily caused, and thermal decomposition of PVC particles is possibly caused is avoided.

The present invention relates to a method for preparing an adsorbent for pressure swing adsorption with a microporous structure, which belongs to the technical field of waste gas adsorption materials, and comprises the following steps: a template agent and an alumina precursor are mixed in a mass ratio of 30 to 40:100 to form a sphere, and a porous alumina sphere is obtained by heat treatment; aminosilane is dissolved in a solvent, impregnated with the alumina sphere, and the alumina sphere is filtered out and dried and cured to obtain the alumina sphere. The alumina sphere of the present invention has a large specific surface area and a rich pore structure, can provide more adsorption sites and channels, is conducive to the diffusion and adsorption of carbon dioxide molecules on the surface of the adsorbent, and the solidified amino group can enhance the interaction between the adsorbent and carbon dioxide, and improve the adsorption selectivity.

The application discloses a lithium hexafluorophosphate processing device and method, and belongs to the field of lithium battery material production equipment. The device comprises a negative pressure distillation cabin, a nitrogen tank, a liquid nitrogen cabin, a vacuum pump, a gas-liquid separator tank, a waste gas treatment assembly, a compression pump and a material recovery cabin. Nitrogen and liquid nitrogen are mixed to control temperature to-20 DEG C to-30 DEG C, and are input into the negative pressure distillation cabin to realize low-temperature cooling. The negative pressure distillation cabin is divided into upper and lower cabins, and is internally provided with a spraying pipe, a spraying head and a differential pressure backflow valve. When the vacuum pump works, the valve is closed to guarantee distillation. When the vacuum pump stops, the valve is opened to make the material automatically backflow and circulate. After gas-liquid separation, nitrogen is recycled and utilized through compression. The material recovery cabin is internally provided with a hollow shape-changing part. Negative pressure expansion assists crystallization, normal-pressure resetting facilitates unloading. The application is precise in temperature control, high in distillation efficiency, recyclable in nitrogen, non-sticky in crystallization, completely sealed in the whole process, free of water and oxygen, significantly improves the purity and yield of lithium hexafluorophosphate, reduces production cost and is suitable for industrialized production.

This application provides a composite solid electrolyte comprising a polymer matrix, a metal salt, and fast-ion conductor ceramic particles. Both the metal salt and the fast-ion conductor ceramic particles are dispersed within the polymer matrix. The fast-ion conductor ceramic particles are sequentially coated from the inside out with an inorganic oxide layer and a fluorinated silane coupling agent. The fluorinated silane coupling agent is chemically bonded to the inorganic oxide layer. This application also provides a method for preparing the composite solid electrolyte. Through both material and process innovation, this application prepares a composite solid electrolyte with high dispersibility, high ionic conductivity, and high interfacial compatibility.

Provided herein are compositions and methods for stabilizing coelenterazine and analogs or derivatives thereof and for improving the solubility and reconstitution efficiency of coelenterazine and analogs and derivatives thereof.

The application discloses a multi-stage countercurrent absorption assembly for chlorine dioxide in tail gas of sodium chlorite process, and mainly relates to the technical field of tail gas treatment. The tail gas enters from a bottom gas inlet and is in contact with absorption liquid in a multi-stage countercurrent mode layer by layer upwards. A first type of atomizing nozzle continuously sprays downwards to form a stable main absorption liquid curtain covering the central region of the tower body, so that high-concentration chlorine dioxide in the tail gas is quickly captured. The absorption liquid flowing in the water ring jacket drives the synchronous rotation of the vortex fan blades. The liquid inlet of a second type of atomizing nozzle is periodically blocked by the blocking pieces distributed alternately with the blades, so that the second type of nozzle is intermittently sprayed upwards. The differential spraying mode and the self-driven metering mechanism of the water flow are combined to strengthen the gas-liquid mass transfer, and the partition pressure-temperature is cooperatively regulated to disperse the reaction heat, so that the technical problems of low-concentration chlorine dioxide in the traditional technology, such as low absorption efficiency, high alkali consumption and easy thermal decomposition, are effectively solved.