70 results about "Triethyl phosphate" patented technology

The invention belongs to the technical field of organic synthesis, and provides a preparation method of isobutyric anhydride. The preparation method provided by the invention comprises the following steps: by taking isobutyric acid as a raw material and TiO2, gamma-Al2O3, SiO2, CuO, palladium-loaded silicon dioxide or triethyl phosphate as a catalyst, dehydrating to form isobutyric anhydride; the catalyst does not react with isobutyric acid, so that side reactions are few in the reaction process, the conversion rate of isobutyric acid and the selectivity of isobutyric anhydride are improved, and finally the yield of isobutyric anhydride is improved. Meanwhile, isobutyric anhydride can be separated from isobutyric acid and water through simple condensation, high-purity isobutyric anhydride is obtained, and continuous production can be achieved.

The invention provides halogen-free flame-retardant liquid epoxy resin, solid epoxy resin for powder coating and a preparation method of the solid epoxy resin, and belongs to the technical field of powder coating. The liquid epoxy resin disclosed by the invention is prepared by polymerizing 2, 4-diamino-6-phenyl-1, 3, 5-triazine, formaldehyde, triethyl phosphite, epoxy chloropropane, sodium hydroxide, DMF (Dimethyl Formamide) and the like. The contents of halogen-free flame-retardant elements nitrogen and phosphorus in the product are high, a solid epoxy resin product obtained by carrying out chain extension on liquid epoxy resin serving as a synthetic monomer of solid epoxy resin of the powder coating and bisphenol F is good in flame retardance, the oxygen index reaches 37% or above, and the flame retardance is high. A coating film obtained after the powder coating and an accelerated dicyandiamide curing agent are subjected to low-temperature rapid curing (150 DEG C / 10 min) is high in gloss and leveling grade and good in impact resistance, hardness and the like, and the application requirements of the powder coating are met.

The application provides a preparation method of an in-situ cross-linked electrically coupled flame-retardant polymer electrolyte and a preparation method of a sodium metal battery. The in-situ cross-linked electrically coupled flame-retardant polymer electrolyte can capture anions to improve the sodium ion conductivity and has excellent flame retardancy. The method provided by the application has the following advantages: the designed polymer electrolyte greatly improves the flame retardancy of the polymer electrolyte by adding the flame retardant triethyl phosphate; in addition, by adding the additives fluoroethylene carbonate and 4-trifluoromethyl phenylboronic acid, the SEI layer and the CEI layer are promoted to be constructed in the cycle process, the cycle stability of the battery is improved, and the boron atoms in the TFPBA act as Lewis acidic centers to capture anions; in addition, the excellent mechanical performance of the electrolyte can inhibit the growth of sodium negative electrode dendrites, and ensure the safety performance of the battery. The application significantly improves the electrochemical performance, cycle life and safety of the sodium metal battery.

The invention discloses a dope solution for membrane fabrication comprising a blend of TEP with NMP as a solvent system in a process to make PVDF membranes, where PVDF resin comprises a homopolymer resin, or a copolymer of VDF and at least one of hexafluoroprdpylene, trifluoroethylene, chlorotrifluoroethylene, or a tetrafluoropropene.

The utility model discloses a triethyl phosphate wastewater treatment device, which relates to the technical field of wastewater treatment and comprises a heating tank, a cooling tank arranged at one end of the heating tank, a neutralizing tank arranged below the cooling tank, a temperature control component arranged at the other end of the heating tank and a first adding component arranged at the top of the heating tank, the stirring component is arranged in the heating tank, the condensing component is arranged in the cooling tank, the second adding component is arranged on one side of the neutralizing tank, and the cleaning component is arranged at the top of the heating tank and the top of the cooling tank; the triethyl phosphate wastewater treatment device disclosed by the utility model can be used for sequentially separating and treating substances with different boiling points in triethyl phosphate wastewater, and is good in treatment effect and extremely high in chemical agent utilization rate.

The invention discloses a surface protection layer of an ultrathin lithium strip as well as a preparation method and application of the surface protection layer, and belongs to the technical field of lithium batteries. The surface protection layer is formed after lithium metal reacts with a composite additive, and the composite additive is composed of solid powder and an organic solvent; wherein the solid powder is selected from one or more of dialkyl dithiophosphate or metal fluoride; the organic solvent is selected from any one of dimethyl sulfoxide, formamide, butyrolactam, acetone, 1, 4-dioxane, tetrahydrofuran, trimethyl phosphate, triethyl phosphate and propylene carbonate. The electrochemical performance of the produced lithium strip with the surface protection layer is remarkably improved, large-scale production can be achieved on the premise that existing equipment is not transformed and technological processes are not increased by means of the preparation method, the technical advantages in cost and technology are achieved, and therefore the lithium strip with the surface protection layer has a good application prospect. The surface protection layer of the ultrathin lithium strip and the preparation method of the surface protection layer have good application prospects.

The invention discloses an aluminum alloy surface functionalized passivation layer construction method based on anhydrous ECMP and application of the aluminum alloy surface functionalized passivation layer construction method in diffusion welding, and belongs to the technical field of metal material surface treatment and connection. According to the method, a non-aqueous electrolyte system with terpilenol as a matrix is adopted, and a phosphorus-doped composite passivation layer with double functions of polishing and welding is constructed on the surface of the aluminum alloy in situ through an electrochemical mechanical polishing (ECMP) process. The water-free electrolyte comprises a supporting electrolyte, a film-forming agent triethyl phosphate, a corrosion inhibitor benzotriazole, a nanometer grinding material and a viscosity modifier. The functional passivation layer can be decomposed in a controlled mode in the diffusion welding process, interface diffusion energy barriers are effectively reduced, aluminum atom mutual diffusion is promoted, and high-quality metallurgical bonding is achieved. According to the method, the technical problem that a natural oxidation film hinders atomic diffusion in aluminum alloy diffusion welding is fundamentally solved, the strength of a diffusion welding joint can reach 90% or above of that of base metal, meanwhile, the diffusion welding temperature is reduced by 20-40 DEG C, the process time is shortened by 30% or above, and the method has remarkable engineering application value.

The invention discloses a negative pressure purification method and device for electronic grade triethyl phosphate, and the method comprises the following steps: S1, carrying out pretest on an equipment main body, a vacuum system, a heat conduction oil system, a cooling system and an instrument control instrument, and ensuring that all test indexes meet requirements; s2, opening a vacuum pump to vacuumize the vacuum buffer tank with condensation; meanwhile, refrigerant circulation of the vacuum condenser is started; s3, the raw materials are conveyed to the light component removal tower through a raw material feeding pump and a raw material feeding flow meter for controlling the feeding flow; s4, light component removal by a light component removal tower: when the content of light components at the bottom of a sample detection tower meets the requirements, conveying materials at the bottom of the light component removal tower to the heavy component removal tower through a heavy component removal tower feeding pump; s5, de-weighting by a de-weighting tower, and conveying the material to a product tank when the sampling is qualified; and S6, filtering to obtain an electronic-grade TEPO product. The boiling point of TEPO is reduced through negative pressure, and high-temperature decomposition is avoided; equipment is simplified through two-stage rectification (light component removal and heavy component removal); impurity introduction and material loss are reduced through nitrogen protection and vacuum condensation.

The invention discloses a bionic modification method of a hemodialysis membrane and application of the bionic modification method, and belongs to the technical field of medical materials.The method comprises the steps that vinylbenzylamine and vinyltriethoxysilane are dissolved in triethyl phosphate to be stirred, an initiator azodiisobutyronitrile is added, and heating polymerization is conducted to obtain a polymer [P (EP-VTES)]; carrying out amidation reaction to form a gallic acid functional polymer (Ga-EPTES); ga-EPTES is cross-linked to the surface of a polyethersulfone membrane in a monomolecular layer form, and the hemodialysis membrane with the functions of resisting oxidation and removing free DNA is prepared. According to the bionic modification method of the hemodialysis membrane, the functional limitation and modification defects of a traditional blood purification material are broken through, an efficient, safe and large-scale solution is provided for sepsis treatment, and the bionic modification method has scientific value and clinical transformation potential.

The invention discloses a preparation method of a flame-retardant electrolyte-containing electrolyte for a lithium ion battery, a commercial electrolyte is taken as a core, and a phosphorus flame retardant is added, so that the safety and reliability of the lithium ion battery in the use process are improved. The flame-retardant electrolyte comprises the following raw materials: triphenyl phosphate, triethyl phosphate and a commercial electrolyte. The preparation method comprises the following steps: respectively adding phosphorus flame retardants triphenyl phosphate and trimethyl phosphate into a commercial electrolyte according to different proportions, adding the composite electrolyte material to prepare a complete lithium ion battery, and carrying out electrochemical performance detection and safety performance detection on the lithium ion battery. According to the flame-retardant electrolyte provided by the invention, the flammability of the electrolyte of the lithium ion battery is reduced, the safety performance of the lithium ion battery is improved, and the flame-retardant electrolyte is suitable for the production environment of most lithium ion batteries.

The invention discloses modified rosin resin and a preparation method thereof, and belongs to the technical field of rosin modification. The modified rosin resin is prepared from the following raw material components: quaternary ammonium salt modified rosin, an antioxidant and polyhydric alcohol, wherein the quaternary ammonium salt modified rosin is prepared by reacting methyl eleostearate with rosin and then sequentially reacting with epichlorohydrin, dimethylamine and 3-chloropropene; the antioxidant is obtained by compounding 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and triethyl phosphate; the polyol at least comprises pentaerythritol; the prepared modified rosin resin has good water resistance and stability, and can be widely applied to the fields of printing ink, gloss oil, coatings and adhesives.

This invention relates to the field of gas separation and discloses a method for preparing a gas separation membrane. The method includes: (1) mixing sodium hydride, octafluoropentanol, and organic solvent A to react and obtain sodium octafluoropentanol; (2) mixing sodium octafluoropentanol with a polydichlorophosphazene solution under a protective atmosphere and heating under reflux to react and obtain the product polyoctafluoropentoxyphosphazene; (3) mixing polydichlorophosphazene, n-octylamine, and an acid-binding agent in organic solvent B to react and obtain the product polyn-n-octylaminephosphazene; (4) mixing polyvinylidene fluoride with triethyl phosphate, coating the mixture onto a nonwoven fabric, and then immersing it in water to obtain a polyvinylidene fluoride substrate; (5) mixing polyoctafluoropentoxyphosphazene, polyn-n-octylaminephosphazene, and organic solvent C, and then coating the mixture onto the polyvinylidene fluoride substrate. The gas separation membrane of this invention has excellent high selectivity for CO2 and has broad industrial application prospects.

The invention discloses an automatic control system and method for continuous preparation of electronic-grade triethyl phosphate, and relates to the technical field of electronic-grade triethyl phosphate processing.The method comprises the steps that the temperature, pressure and flow of different positions in a rectifying tower and technological parameters used for representing the concentration of high-boiling impurities are obtained in real time through an online analysis instrument; calculating the accumulation rate of the high-boiling impurities based on the process parameters; when the accumulation rate exceeds an impurity accumulation warning threshold value, an impurity accumulation early warning signal is generated; and based on the process parameters, calculating the theoretical plate number or equal plate height of the rectifying tower as a performance parameter for representing the tower efficiency. Based on real-time process parameters of multiple positions in the rectifying tower, an accumulation rate calculation mechanism of the high-boiling impurities is constructed, the slow enrichment trend of the high-boiling impurities in the operation process is recognized, an impurity accumulation warning threshold value is set, and when it is detected that the accumulation rate exceeds the threshold value, an impurity accumulation early warning signal is generated in time.

The invention discloses a composite plugging material with a core-shell structure, a preparation method and a water-based drilling fluid, and relates to the technical field of oilfield chemistry, and the preparation method of the composite plugging material comprises the following steps: reacting a polyhydroxy aromatic compound with epichlorohydrin to prepare an aromatic compound, the preparation method comprises the following steps: mixing epoxy resin with an aromatic compound prepared by reacting a multi-primary alcohol aromatic compound with triphenylphosphine, bromotrichloromethane, sodium azide and triethyl phosphite in sequence, melting, casting and crushing to obtain epoxy resin particles, and coating a polymer with the epoxy resin particles to obtain the composite plugging material which is used for preparing a water-based drilling fluid. Compared with a common rigid particle material, the core-shell structure plugging material prepared in the invention has the advantages that the pressure resistance is higher, after the core-shell structure plugging material reaches a softening point in a high-temperature and high-pressure stratum, a glass state is converted into a high-elastic state, the core-shell structure plugging material has elastic deformation capacity, the slippage effect among particles can be reduced, a more compact plugging layer is formed, and the pressure bearing capacity is higher.

The invention relates to the technical field of lithium ion batteries, in particular to a high-safety lithium battery and a preparation method thereof. The lithium battery comprises a positive plate, a negative plate, a diaphragm, a high-flame-retardant electrolyte and a ceramic fiber membrane, the high-flame-retardant electrolyte comprises the following raw materials: an organic solvent, a lithium salt, a functional additive and a polymer. Through the formula design of the flame-retardant electrolyte obtained by matching triethyl phosphate, hexachlorocyclotriphosphazene and tri (trimethylsilane) borate ternary additives with the brominated polymer, and in combination with the integrated innovation of the ceramic fiber membrane, the thermal safety boundary is greatly improved while the cycle performance of the battery is basically maintained, and the service life of the battery is prolonged. And the potential safety hazard of the high-energy-density lithium battery is solved.

This utility model discloses a low-emission triethyl phosphate manufacturing device, relating to the field of triethyl phosphate manufacturing technology. It includes a base plate and a reaction vessel. The reaction vessel is fixedly mounted on one side of the upper surface of the base plate. An exhaust pipe is provided on one side of the top of the reaction vessel. A filter shell is fixedly mounted on the upper surface of the base plate, located on one side of the reaction vessel. One end of the exhaust pipe extends into the upper interior of the filter shell. Both ends of the filter shell, away from the reaction vessel, have through slots, and filter modules are inserted into both through slots. An exhaust pipe is provided on one side of the lower end of the filter shell. A horizontal plate is fixedly mounted on the outer wall of the middle section of the filter shell, away from the reaction vessel. A rotating rod is rotatably sleeved in the middle of the horizontal plate. This utility model can filter the waste gas generated during triethyl phosphate manufacturing, effectively reducing environmental pollution. Furthermore, the dual-filter configuration allows for rapid switching, reducing equipment downtime during filter cleaning.

The invention relates to the technical field of aerogel fireproof plates, and discloses an aerogel fireproof plate and a preparation process thereof, the aerogel fireproof plate is prepared from the following raw materials by weight: 10-30 parts of aerogel powder; 20 to 35 parts of wollastonite mineral fiber; 5 to 10 parts of aluminum silicate fiber; 2 to 5 parts of an inorganic binder; 1 to 1.5 parts of expanded vermiculite; 0.5 to 1.2 parts of a pH regulator; 1.5 to 2.5 parts of a penetrating agent; 0.5 to 3.0 parts of a coupling agent; 0.5 to 3.0 parts of triethyl phosphate; 0.2 to 2.0 parts of sodium hexametaphosphate; 0.5 to 3.0 parts of sodium gluconate; 0.05 to 0.5 part of ferrous sulfate heptahydrate; 0.1 to 1.0 part of potassium persulfate; and 350 to 500 parts of deionized water. The aluminum silicate dissolving efficiency and the slurry stability are improved, the manufacturing difficulty of the aerogel fireproof plate is reduced, and the production efficiency and the product performance are improved.

The invention relates to the technical field of refractory materials, in particular to a magnesium-carbon refractory material containing a metal-carbon complex phase and a preparation method thereof, and the magnesium-carbon refractory material containing the metal-carbon complex phase comprises fused magnesia particles, silicon-carbon complex phase particles, modified crystalline flake graphite, aluminum powder, monatomic silicon powder, nano carbon black and boron carbide. Through SiC-Si-C multiphase particles, SiC is used for resisting slag, and residual Si is oxidized and self-repaired; meanwhile, graphite is modified with triethyl phosphate and triethyl borate, a BPO4 coating is generated, medium and low temperature physical barrier and high temperature liquid phase sealing and filling are achieved, and the graphite is not damaged due to mild modification. The two constructs a multi-scale strengthening system, and carbon oxidation and slag erosion are effectively inhibited.

The application relates to the field of high-purity electronic gas preparation, in particular to a device and method for preparing electronic-grade triethyl phosphate. The device comprises a reaction rectifying tower, an adsorption tower, a light-removing tower, a heavy-removing tower and a product tank; the bottom of the reaction rectifying tower is communicated with the bottom of the adsorption tower through a first pipeline, the top of the adsorption tower is communicated with the light-removing tower through a second pipeline, the bottom of the light-removing tower is communicated with the heavy-removing tower through a third pipeline, and the top of the heavy-removing tower is communicated with the product tank through a fourth pipeline; the bottom of the product tank is communicated with the side through a fifth pipeline, a second filter and a liquid conveying pump are arranged on the fifth pipeline, and a first filter is arranged on the first pipeline. The device is used for reacting ethanol and phosphorus oxychloride under the action of a catalyst to generate crude triethyl phosphate; the crude triethyl phosphate is dehydrated, then subjected to primary filtration and primary rectification to remove light components; secondary rectification is further conducted to remove heavy components, secondary filtration is further conducted, and finally, electronic-grade triethyl phosphate is obtained.

The invention relates to the field of bone repair, and discloses a 3D printing bone-imitating biological scaffold and a preparation method thereof.The preparation method comprises the steps that firstly, ammonium bromide is added into a mixture of deionized water and absolute ethyl alcohol, and an ammonium bromide solution is obtained; sequentially adding an ammonia solution, tetraethoxysilane, triethyl phosphate, calcium nitrate and sodium vanadate, continuously stirring, centrifuging, and collecting a precipitate; washing, aging, heating, cooling, grinding, crushing, and screening to obtain V-MBG powder; preparing a TA solution and a V-MBG solution, mixing and putting the TA solution and the V-MBG solution, and freeze-drying to obtain TA-coated V-MBG powder; preparing a trichloromethane solution of PLGA (poly (lactic-co-glycolic acid)), adding the V-MBG powder, fully stirring, and pumping out the trichloromethane solution to obtain solid slurry; printing an inner-layer stent and a hollow-tube outer-layer stent to obtain a bone-imitating biological stent, and soaking the bone-imitating biological stent in a TA solution to obtain a PLGA / TA-V-MBG composite stent; the problems that in the prior art, the bone repairing effect is poor, the bone-like cell proliferation and differentiation effect is poor, and bone defect repairing caused by bone tumor treatment cannot be achieved are solved.

The application provides an alcohol-based inkjet printing ink for preparing a perovskite layer, a velvet-shaped perovskite layer and a preparation method and application thereof, and the printing ink comprises an alcohol-based solvent, a first functional organic solvent, a second functional organic solvent and an organic ammonium salt; the first functional organic solvent comprises at least one of gamma-valerolactone and propylene carbonate; the second functional organic solvent comprises at least one of triethyl phosphate, ethyl acetate, N-methyl pyrrolidone, isosorbide dimethyl ether and dihydro levoglucosenone; the volume ratio of the alcohol-based solvent, the first functional organic solvent and the second functional organic solvent is (60-98):(1-20):(1-20); the boiling point of the alcohol-based solvent is lower than the boiling points of the first functional organic solvent and the second functional organic solvent, and the problems of nozzle blockage, coffee ring phenomenon, low perovskite phase purity and easy formation of defects in the content of the perovskite layer caused by the organic ammonium salt ink in the prior art are solved.

This invention relates to the field of polyurethane foam materials, specifically disclosing a polyurethane foam potting material, its preparation method, and its applications. The material comprises component A and component B, wherein component A is composed of grafted polyether polyol, flame-retardant filler, zinc stearate, water, a composite catalyst, ammonium bicarbonate, and polyethylene glycol; and component B is composed of isocyanate, triethyl phosphate, and coated molecular sieves. The mass ratio of component A to component B is 100:60~80. Compared with existing technologies, the polyurethane foam potting material prepared by this invention possesses excellent flame retardancy, heat insulation, and low water absorption properties, providing reliable protection for electronic components.

The invention discloses a low-temperature auxiliary preparation method of a ceramic-based polyamide nanofiltration membrane, which comprises the following steps: (1) carrying out ultrasonic cleaning and strong alkali activation on a ceramic membrane, and loading a silane coupling agent to obtain a silane grafted ceramic membrane; (2) reacting the silane grafted ceramic membrane obtained in the step (1) with an aqueous solution containing piperazine and a polyamine catalyst at room temperature, and then removing the unreacted aqueous solution; (3) reacting the material obtained in the step (2) with an n-hexane solution of trimesoyl chloride and triethyl phosphate at room temperature, then removing the unreacted n-hexane solution, and pre-cooling the n-hexane solution at 20 DEG C for 12 hours for use; and (4) carrying out air drying and heat treatment on the material obtained in the step (3). According to the method, the oil phase is pre-cooled at low temperature, and the specific oil phase active buffer agent is introduced, so that the reaction activity of the acyl chloride monomer is effectively reduced, the interfacial polymerization process is changed from instantaneous explosion to controllable progressive, and the thickness uniformity and compactness of a separation layer are remarkably improved.

This utility model discloses an integrated green production device for triethyl phosphate, including an installation box. An installation plate is fixedly installed inside the installation box. A positioning frame and a fixing frame are also fixedly installed inside the installation box, located on opposite sides of the installation plate. Three sets of filter screens are installed between the installation plate and the fixing frames. The positioning frame has three symmetrically distributed shaking rods, each located inside one of the three filter screens and in contact with the inner wall of the filter screen. A first spring is sleeved on the positioning frame, and a first cam is rotatably mounted on the positioning frame. The first cam is in contact with the upper end of the shaking rod. Through the first cam on the positioning frame and the spring, the shaking rods, made of elastic metal material, intermittently and regularly expand and shake within the filter screen, thereby causing the filter screen to expand and shake slightly, shaking off impurities and dust adhering to the surface of the filter screen.

The invention relates to the field of synthesis of organic small molecule compounds, in particular to a production process of triethyl phosphate. The production process of triethyl phosphate provided by the invention comprises the following steps: firstly adding a phosphorus trichloride mother solution into a loop reactor, preheating, continuously injecting molten yellow phosphorus into the loop reactor under hot water pressure feeding, and simultaneously continuously introducing dry chlorine according to a ratio; mild reaction is carried out under the conditions of circulation mixing and external circulation cooling at 76-90 DEG C and 0-20 kPa; and removing entrained free phosphorus from gas-phase phosphorus trichloride generated by the reaction through a phosphorus washing tower, cooling in a condenser, and obtaining a finished product from condensate according to a reflux ratio of (2-4): 1. According to the invention, the free phosphorus in the finished product is stably reduced to be less than or equal to 5ppm through a coupling process of circulation reaction, external circulation cooling and reflux washing of the phosphorus washing tower, so that the safety risk caused by high temperature, high pressure and blockage of a phosphorus pool is eliminated.

The invention provides a battery pole piece, a lithium ion battery and a preparation method of the lithium ion battery. Specifically, a coating is arranged on one side, far away from a current collector, of an active material layer of the battery pole piece; the coating is formed by crosslinking a first monomer, a second monomer, a binder and a photoinitiator; the first monomer is prepared from at least one of diethyl allyl phosphonate, triethyl phosphate, diphenyl phosphate, dimethyl methylphosphonate or melamine cyanurate; and the second monomer is prepared from at least one of ethoxylated trimethylolpropane triacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, tripropylene glycol diacrylate or trimethylolpropane trimethacrylate. The single and uniform coating not only helps to alleviate the problems of thermal runaway and cycle attenuation of the high-nickel ternary battery, but also does not need precise equipment in the preparation process, can be compatible with the existing lithium battery production line, and realizes collaborative optimization of thermal safety-cycle performance-mass production cost.

The invention provides a flame-retardant electrolyte capable of being solidified in situ and a sodium ion secondary battery. Specifically, the flame-retardant electrolyte capable of being solidified in situ comprises the following components: sodium salt, a solvent, a functional additive, a three-functional-group acrylate monomer and an initiator, the solvent comprises a primary solvent and an optional secondary solvent; wherein the main solvent is triethyl phosphate; the secondary solvent is selected from at least one of a carbonic ester solvent, a carboxylic ester solvent and an ether solvent; the main solvent accounts for 70%-100% of the volume fraction of the solvent; the trifunctional acrylate monomer accounts for 3%-15% of the mass of the electrolyte. The invention also provides an in-situ solidified sodium ion secondary battery which comprises a positive electrode material, a negative electrode material and the flame-retardant electrolyte capable of being solidified in situ. The electrolyte is low in cost, high in safety and compatible with a carbon negative electrode.

The invention provides a composite fire extinguishing gel and a preparation method and application thereof, and relates to the technical field of fire extinguishing materials, the composite fire extinguishing gel comprises the following raw materials: water, acetic acid, chitosan, methyl cellulose, alkyl glycoside and triethyl phosphate; the composite fire extinguishing gel is prepared from the following raw materials in percentage by weight: 0.3 to 0.6 weight percent of chitosan, 1.2 to 2.4 weight percent of methyl cellulose, 0.1 to 0.2 weight percent of acetic acid, 0 to 20 weight percent of alkyl glycoside, 0 to 35 weight percent of triethyl phosphate and the balance of water. The composite fire extinguishing gel has excellent fire extinguishing efficiency and good adhesion and isolation performance.

The invention discloses a tail gas recycling process for triethyl phosphate production, which comprises a processing tank and a smoke collecting box, the smoke collecting box is arranged on one side above the processing tank, a dust removal tower is arranged on one side of the smoke collecting box, and the outer side of the dust removal tower is fixedly mounted between the smoke collecting box and the processing tank through a fixing frame. And a filter is arranged on one side of the lower portion of the dust removal tower, a purifier is arranged on one side of the upper portion of the filter, and a cooler is installed at the top of the purifier. According to the tail gas recycling process for triethyl phosphate production, tail gas generated in the triethyl phosphate production process is collected through the smoke collecting box, the tail gas is prevented from being directly discharged into the atmosphere, pollutants such as solid particle impurities and harmful gas components contained in the tail gas are treated step by step through equipment such as the dust removal tower, the filter and the purifier, and the tail gas is recycled. A large amount of pollutants are removed or the concentration is reduced, so that the discharge amount of the pollutants into the environment is obviously reduced, the quality of surrounding air is improved, and the ecological environment is protected.

The invention relates to the technical field of organic synthesis, in particular to a continuous preparation method of triethyl phosphate, which comprises the following steps: S1, adding a solvent A into a reaction kettle for bottoming, cooling to 20-30 DEG C in a stirring state, continuously introducing phosphorus oxychloride, ethanol, a solvent B and an acid-binding agent, and reacting for 1-2 hours; enabling the phosphorus oxychloride, the ethanol, the solvent B and the acid-binding agent to react to form reaction liquid, and enabling the reaction liquid to overflow into a neutralization kettle; s2, adding ammonia water into the neutralization kettle, and standing for layering to obtain an organic phase and a water phase; s3, evaporating, dehydrating, cooling and crystallizing the water phase to obtain ammonium chloride; and respectively carrying out salt drying and rectification on the organic phase to obtain the triethyl phosphate. According to the continuous preparation method of triethyl phosphate, provided by the invention, the damage of hydrogen chloride to alcohol and ester during high-temperature dealcoholization is thoroughly avoided, and the yield reaches 717kg / h or above; the product yield is increased from 88% to about 98%, the purity can reach 99.92% or above, and the moisture content is as low as about 200 ppm.