30 results about "Triethyl borate" patented technology

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The invention discloses a modified PVC (polyvinyl chloride) particle and a preparation method thereof in the field of high polymer material modification, the modified PVC particle takes PVC resin as a matrix, and two brand new modifiers, namely a silicon-boron-nitrogen hybrid epoxy nanosphere and epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer, and other auxiliaries are added. The silicon-boron-nitrogen hybrid epoxy nanospheres are prepared by the following steps: hydrolyzing tetraethoxysilane and triethyl borate in absolute ethyl alcohol to generate a silicon-boron alcohol intermediate, then carrying out sol-gel reaction on the silicon-boron alcohol intermediate and glycidyl methacrylate to form a hybrid network containing an epoxy group, and finally carrying out ultrasonic dispersion. The epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer is prepared by carrying out ring opening on epoxidized soybean oil and peracetic acid to generate epoxidized soybean oil acrylate, and then carrying out free radical copolymerization reaction on the epoxidized soybean oil acrylate, maleic anhydride and 2-ethylhexyl acrylate. The method is suitable for the fields of high-end building materials, automotive interiors and the like.

This invention discloses a process for preparing ultrafine glass powder using a spray pyrolysis method in the field of glass encapsulation materials. The process first prepares a homogeneous solution A using boric acid, aluminum nitrate nonahydrate, alkaline earth metal nitrates, lithium acetate, sodium acetate, and potassium acetate. Tetraethyl orthosilicate is dissolved in anhydrous ethanol to obtain solution B. A rare earth transition metal composite oxide nanoclusters encapsulated with a silica shell hybrid inorganic modifier is dispersed in anhydrous ethanol to obtain suspension C. Solution B and suspension C are mixed, and deionized water and hydrochloric acid are added to adjust the pH. After pre-hydrolysis and cooling, triethyl borate is added dropwise for co-condensation, and then mixed with solution A. After adjusting the pH and aging, the mixture is ultrasonically atomized and spray pyrolyzed to obtain ultrafine glass powder. The glass powder obtained by this invention has small particle size, high sphericity, and can be continuously produced.

The invention discloses fireproof flame-retardant rubber and a preparation method thereof, and relates to the field of rubber. The preparation method comprises the following steps: during preparation of the fireproof flame-retardant rubber, reacting Na-montmorillonite powder with alkenyl tributyl phosphonium chloride and vinyl dibutyl borate in sequence to obtain modified montmorillonite; the preparation method comprises the following steps: reacting N-(4-anilinophenyl) maleimide with 5-amino-2-mercapto benzimidazole to obtain an anti-aging reactant; reacting the natural rubber emulsion with an anti-aging reactant to obtain modified natural rubber; and reacting the modified natural rubber, the modified montmorillonite, triethyl borate and sulfur to obtain the fireproof flame-retardant rubber. The fireproof flame-retardant rubber prepared by the invention has excellent flame retardance, ageing resistance and mechanical properties.

The present application uses the mixture of residual liquid and cracking product (LPS) after the cracking of polydimethylsilane (PDMS) as raw material, and the polymerization reaction with tributyl borate or triethyl borate obtains viscous liquid (LPCS), which introduces the heterogeneous element boron; the viscous liquid (LPCS) further reacts with zirconium acetylacetonate to introduce the heterogeneous element zirconium, and the polycarbosilane ceramic precursor (PBZCS) doped with boron and zirconium elements is obtained; the precursor silk obtained after the melt spinning can be inosculated by the relatively simple air oxidation crosslinking method, and the boron and zirconium elements act as sintering agents to densify the fiber in high-temperature sintering, and the high-temperature-resistant ceramic fiber is obtained.

The invention relates to the technical field of electrolytes, and discloses an electrolyte additive, a composition for a high-voltage electrolyte, the high-voltage electrolyte, a preparation method of the high-voltage electrolyte and a lithium ion battery. The additive comprises a component A, a component B and a component C in a mass ratio of 1: (0.2-1.5): (0.2-2), the component A is tripropargyl phosphate; the component B is selected from at least one of triethyl borate, tripropyl borate and tributyl borate; the component C is selected from at least one of 3-aminopropyltriethoxysilane, 1, 3-divinyltetramethyldisiloxane, trimethoxy (3, 3, 3-trifluoropropyl) silane and triethoxy (pentafluorophenyl) silane, and the component C is selected from at least one of 3-aminopropyltriethoxysilane, 1, 3-divinyltetramethyldisiloxane, trimethoxy (3, 3, 3-trifluoropropyl) silane and triethoxy (pentafluorophenyl) silane. The electrolyte additive provided by the invention has an excellent application prospect in the field of high-voltage electrolyte. The high-voltage electrolyte provided by the invention has good stability and oxidation resistance, and can be applied in a high-voltage range of 3.0-5.0 V.

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 invention relates to the technical field of methyl ethyl ketone peroxide production, in particular to a preparation method and application of methyl ethyl ketone peroxide. Comprising the following steps: adding [BMIM] PF6 ionic liquid into a reaction kettle, and then adding a composite catalyst, triethyl borate and methyl ethyl ketone; after cooling, dropwise adding H2O2, raising the temperature to 20-30 DEG C, and adding MnHCF dispersion liquid; cooling and crystallizing the reaction liquid, and filtering to obtain a methyl ethyl ketone peroxide primary crystal; performing reduced pressure distillation on filtrate to recover ionic liquid; dehydrating through a vacuum film; after polyurethane acrylate and DPGDA are added, the mixture is coated with a gelatin-Arabic gum wall material, and methyl ethyl ketone peroxide is obtained through spray drying. Through three innovations of MnHCF bimetallic catalysis, boric acid ester stabilization and microcapsule safety design, the core pain point in MEKP production and application is effectively solved, and remarkable advantages are shown in catalytic efficiency, storage stability, safety performance and practical application.

The invention provides a preparation method of electronic-grade high-abundance 11B triethyl borate, and belongs to the technical field of organic synthesis. The method comprises the following steps: mixing sodium ethoxide with an organic solvent to obtain a sodium ethoxide feed liquid; the organic solvent is dichloromethane or acetone, the water content in the organic solvent is less than or equal to 0.001 wt%, and the mass ratio of the organic solvent to the sodium ethoxide is (3.5-5): 1; introducing 11B boron trifluoride into the sodium ethoxide feed liquid at the temperature of 10 DEG C below zero to 5 DEG C below zero, and carrying out esterification reaction to obtain esterification product feed liquid; the < 11 > B abundance of the < 11 > B boron trifluoride is greater than or equal to 99.995%; the esterification product feed liquid is subjected to solid-liquid separation, the obtained liquid material is rectified, the 11B triethyl borate with the abundance larger than or equal to 99.995%, the organic purity larger than or equal to 99.995% and the inorganic purity larger than or equal to 99.9995% can be directly obtained, and the method is easy to operate, low in cost and suitable for large-scale production.

The invention provides an aerogel composite polyurethane high-density cold insulation pipe bracket and a preparation method thereof, and belongs to the field of aerogel products. The method comprises the following steps: carrying out gelation and aging treatment on a mixed precursor solution of ethyl orthosilicate, isocyanate propyl triethoxy silane and triethyl borate; the wet gel is immersed in a solution containing maleimide propyl triethoxy silane; carrying out supercritical drying on the surface functionalized gel; placing the aerogel precast block in a mold, vacuumizing, injecting the mixed solution into the mold, and then heating to carry out an interface pre-crosslinking reaction; injecting isocyanate into the mold, closing the mold, applying pressure, and carrying out programmed heating at the same time so as to sequentially carry out a foaming reaction and an interface strengthening reaction; and carrying out post-curing treatment on the composite body to obtain the aerogel composite polyurethane high-density cold insulation pipe bracket. A strong chemical bonding interface of aerogel and polyurethane is constructed from the molecular level, and the structural stability and long-term cold insulation reliability of the pipe bracket are improved.

The invention discloses a gas chromatographic analysis method of high-purity triethyl borate, which comprises the following steps: a preparation step: preparing a sample, cleaning a sample injection needle and a chromatographic column, the purity of the sample is at least 4N, and the sample injection needle is repeatedly cleaned by isopropanol and then repeatedly cleaned by the sample; and an analysis step: loading a sample, carrying out gas chromatographic analysis, and carrying out TEB purity calculation by adopting a peak area normalization method. According to the method, a high-purity sample is taken as an analysis object, under the condition that impurities are not introduced, impurity components in a product are identified as much as possible, and the accuracy of a detection result is ensured.

The invention relates to the technical field of gas chromatography, in particular to a gas chromatography purity analysis system for electronic grade triethyl borate. According to the method, accurate and stable adjustment of the temperature, the speed and the flow of a sample inlet is ensured through an accurate sample injection amount and sample injection speed control model and a fuzzy PID control algorithm, and interference of temperature fluctuation on the gasification and separation process of triethyl borate is avoided; a high-precision chromatographic column separation technology and optimized flow velocity control are adopted, and a separation degree factor and the retention time of a chromatographic peak are accurately calculated, so that full separation of each component is ensured, and the resolution of impurity analysis is remarkably improved. And through noise reduction processing and wavelet transformation, the system effectively removes high-frequency noise in the signal, the recognizable degree of the target signal is enhanced, and the reliability of quantitative analysis is improved. Meanwhile, the control feedback module performs automatic adjustment according to the noise reduction demand characteristic value, and optimizes the sample introduction process to realize the optimal analysis effect.

The invention discloses a formaldehyde-free A-grade non-combustible water-based paint and a preparation method thereof, and belongs to the field of functional polymer materials. The paint takes two brand-new modified compounds as a film forming main body: one is boron-silicon synergistic modified water-based polyurethane; the preparation method comprises the following steps: reacting polycarbonate diol with dicyclohexylmethane diisocyanate to generate an isocyanate-terminated prepolymer, adding methyldiethanolamine for neutralization, and then introducing triethyl borate and gamma-aminopropyltriethoxysilane for modification; and the phosphorus-nitrogen dual-curing waterborne epoxy acrylate is prepared by the following steps: reacting epoxy resin with acrylic acid to generate a prepolymer, and adding ammonium hypophosphite and melamino-formaldehyde resin for modification. The coating is composed of the two modifiers, deionized water, propylene glycol butyl ether, nano aluminum hydroxide, kaolin, a dispersing agent, a defoaming agent and other assistants. The coating is free of harmful substances such as formaldehyde and the like, has the combustion performance reaching grade A, has high adhesive force and scrub resistance, and is suitable for decoration engineering such as indoor wall surfaces and the like.

The application relates to the technical field of silicone rubber, in particular to a preparation method of a core-shell structure modified ceramic powder and a ceramized silicone rubber, which comprises the following steps: dispersing pretreated inorganic material powder in an ethylene glycol aqueous solution at a high speed, adding triethyl borate and a catalyst drop by drop under high-speed stirring, reacting, and ensuring that a shell layer is uniformly grown to a required thickness; a reaction formula is as follows: after the reaction is completed, standing and aging are carried out to stabilize the shell layer structure, the coated powder is separated out, impurities are removed through low-temperature drying, physically adsorbed water and solvents are removed, and finally, heat treatment is carried out to convert the amorphous gel shell layer into a crystalline or dense oxide shell layer and remove organic residues; a reaction formula is as follows: the inorganic material powder is weakly acid or weakly alkaline and is insoluble in water.

This invention discloses a method for preparing a slow-release lithium iron phosphate cathode material, belonging to the technical field of lithium iron phosphate cathode material preparation. The method includes the following steps: S1. Introducing a doped carbon source into a lithium silicate precursor for CVD carbon coating to obtain a carbon-coated lithium replenishing agent; the doped carbon source is a carbon source and a dopant source; the carbon source is at least one of methane, acetylene, ethylene, and propylene; the dopant source is at least one of trimethyl borate, triethyl borate, triisopropyl borate, and trimethylcycloborane; S2. Sintering the lithium iron phosphate precursor slurry and the carbon-coated lithium replenishing agent to obtain a slow-release lithium iron phosphate cathode material. This invention forms a uniform carbon layer on the surface of lithium silicate using a gas-phase carbon source to obtain a slow-release lithium replenishing agent; then, it is blended with the lithium iron phosphate precursor slurry and sintered to obtain a cathode material with both high capacity and long cycle life. This cathode material exhibits excellent battery capacity and excellent cycle life, and its battery capacity is not easily decayed.

The invention discloses a biomass-based hard carbon material with a closed-pore structure optimized by a boron-based template agent, a preparation method of the biomass-based hard carbon material and application of the biomass-based hard carbon material in a sodium-ion battery. The preparation method comprises the following steps: (1) carrying out solid-liquid mixing on biomass and an aqueous solution of a boron template agent, and drying; the selected boron template agent comprises at least one of boric acid, borax, triethyl borate, trimethyl borate, metaboric acid, sodium metaborate and potassium borate. And (2) carbonizing the dried mixed material twice, naturally cooling, pickling, and removing the template to leave a rich pore structure. And performing high-temperature re-carbonization on the carbon material, cooling, and sequentially performing crushing, acid pickling, water washing and drying. The obtained biomass-based hard carbon material has a pore structure with a large specific surface area and closed pore volume, the defect density of a graphite structure is reduced to slow down sodium death caused by an SEI film, and more pore-filled sodium storage sites are provided, so that the first coulombic efficiency and sodium storage performance of a battery are improved.

The invention belongs to the technical field of cable preparation, and particularly relates to a copper core and aluminum core plastic insulation power cable and a preparation method thereof.The preparation method comprises the following steps that modified magnesium hydroxide and modified carbon black are dispersed in absolute ethyl alcohol, an acetic acid solution is added for stirring reaction, and composite particles are obtained after filtering and drying; the modified magnesium hydroxide is obtained by treating magnesium hydroxide with triethyl borate and KH-560; the modified carbon black is obtained by treating carbon black with TEOS, APTS and phosphorous acid; and uniformly mixing EVA, the composite particles, PE-g-MAH, an antioxidant and a lubricant, feeding the mixture into an extruder, and performing concentric extrusion with the cable core to obtain an outer sheath, thereby obtaining the power cable. According to the invention, the outer sheath containing the composite particles is coated outside the cable core, so that the service life of the cable in an ultraviolet environment is prolonged, and the smoke density of the cable in a fire disaster condition is reduced at the same time.

The invention relates to the technical field of photoelectric conversion materials, in particular to a perovskite precursor material for photoelectric conversion and a preparation method thereof. The precursor material is prepared from the following raw materials: lead iodide, stannous iodide, methyl amine iodide and a modified hyperbranched polymer; the modified hyperbranched polymer is prepared from the following raw materials in parts by weight: 2 to 3 parts of triethyl borate, 2 to 3 parts of 1, 3-propylene glycol, 0.5 to 0.8 part of 2-amino-6-chlorobenzimidazole, 0.3 to 0.5 part of acryloyl chloride, 0.3 to 0.4 part of acrylic acid, 1 to 1.5 parts of trifluoroethyl methacrylate and 0.4 to 0.6 part of dopamine. The prepared perovskite precursor can improve the photoelectric conversion efficiency and improve the stability.

The application relates to the technical field of electrolyte, and discloses an electrolyte additive, a composition for high-voltage electrolyte, a high-voltage electrolyte, a preparation method of the high-voltage electrolyte and a lithium ion battery. The additive contains component A, component B and component C in a mass ratio of 1:(0.2-1.5):(0.2-2); the component A is tripropargyl phosphate; the component B is at least one selected from triethyl borate, tripropyl borate and tributyl borate; and the component C is at least one selected from 3-aminopropyl triethoxysilane, 1,3-divinyl tetramethyldisiloxane, trimethoxy (3,3,3-trifluoropropyl) silane and triethoxy (pentafluorophenyl) silane. The electrolyte additive has an excellent application prospect in the field of high-voltage electrolyte. The high-voltage electrolyte is stable and resistant to oxidation, and can be applied in a high-voltage range of 3.0-5.0 V.

Disclosed are an electrolyte suitable for a lithium-ion battery of a silicon-carbon system and a lithium-ion battery. The electrolyte provided in the present disclosure includes an organic solvent, an additive, and a lithium salt, where the additive includes lithium trifluoromethyl triethyl borate, prop-1-ene-1,3-sultone, and fluoroethylene carbonate. The combined use of the additive may significantly prolong the cycle life of a silicon-carbon battery, and enables the silicon-carbon battery to have both high-temperature / low-temperature performance and safety performance, so that the silicon-carbon battery is enabled to be more suitable for large-scale commercial production.

The invention provides a hot-melt double-faced adhesive tape and a preparation method thereof, and the hot-melt double-faced adhesive tape comprises the following components in parts by weight: 40-60 parts of SEBS thermoplastic elastomer, 10-20 parts of polyisobutene, 5-10 parts of modified polyurethane, 3-7 parts of modified tackifier, 6-12 parts of mineral oil, 1-3 parts of modified nano silicon dioxide and 0.5-1.5 parts of antioxidant. The modified polyurethane is polyurethane modified by polydimethylsiloxane and a silane coupling agent; the modified tackifier is obtained by carrying out dehydration reaction on triethyl borate, boric acid glycerin, borate and silicon hydroxyl; the modified nano silicon dioxide is chitosan modified nano silicon dioxide; and the antioxidant is dilauryl thiodipropionate. The hot-melt double-sided adhesive tape has no viscosity initially, can be tightly bonded with materials such as aluminum foil and nylon under high-temperature and high-pressure conditions, and has excellent electrolyte resistance.

This application belongs to the field of lithium battery technology, and particularly relates to composite modified electrolyte sheets and their preparation methods, and lithium batteries. The method includes: adding succinate and polyvinyl alcohol to a solvent mixture, adding potassium trifluoromethanesulfonylimide and a first lithium salt in multiple batches to obtain a precursor solution; curing and drying the precursor solution in a preset mold to obtain a precursor substrate; dissolving lithium borate in a solvent mixture and adjusting the viscosity to obtain a first slurry; spin-coating the first slurry onto both sides of the precursor substrate to obtain a first electrolyte substrate; adding triethyl borate to anhydrous ethanol, adding a second lithium salt and boric acid to obtain a second slurry; spin-coating the second slurry onto both sides of the first electrolyte substrate to obtain a second electrolyte substrate; obtaining a framework suspension based on a first COF monomer, a second COF monomer, polyethylene glycol, and potassium carbonate; spin-coating the framework suspension onto both sides of the second electrolyte substrate to obtain a composite modified electrolyte sheet; reducing interfacial impedance and improving electrochemical performance.

The application relates to the technical field of refractory materials, in particular to a magnesium-carbon refractory material containing metal-carbon complex phases and a preparation method thereof, which comprises fused magnesia particles, silicon-carbon complex phase particles, modified flake graphite, aluminum powder, elemental silicon powder, nano carbon black and boron carbide. The SiC-Si-C complex phase particles are used for slag resistance and residual Si oxidation self-repairing. The graphite is modified by triethyl phosphate and triethyl borate to form a BPO4 coating, which realizes physical blocking at medium and low temperatures and liquid phase sealing at high temperatures, and the graphite is not damaged by the mild modification. The two components build a multi-scale strengthening system, and effectively inhibit carbon oxidation and slag corrosion.

This application belongs to the field of cable material technology and proposes a method for preparing environmentally friendly, low-smoke, halogen-free polyethylene cable material. High-density polyethylene is melt-grafted with vinyltrimethoxysilane and triethyl borate to form a cross-linked network containing Si-O-B bonds. During combustion, this network pyrolyzes to generate B2O3 and SiO2 nanoparticles. The former melts to form a liquid layer that adsorbs free radicals to inhibit the combustion chain reaction, while the latter forms a eutectic glass phase with B2O3. Combined with ZnO nanoparticles released from the decomposition of a borosilicate-metal chelating agent as a flux, a dense glass-ceramic layer is formed in the carbon layer to isolate oxygen and heat. Simultaneously, ethylene-vinyl acetate copolymer, as a vinyl elastomer, not only improves flexibility through its toughening phase, but its vinyl groups also interact with the Si-O-B bonds of the borosilicate-grafted polyethylene, achieving a comprehensive improvement in flame retardancy, smoke suppression, and mechanical properties.

The application relates to the technical field of photoelectric conversion materials, in particular to a perovskite precursor material for photoelectric conversion and a preparation method thereof. The preparation raw material of the precursor material comprises the following components: lead iodide, stannous iodide, methyl amine iodide and modified hyperbranched polymer; the preparation raw material of the modified hyperbranched polymer comprises the following components in parts by weight: triethyl borate 2-3 parts, 1,3-propanediol 2-3 parts, 2-amino-6-chlorobenzimidazole 0.5-0.8 parts, acryloyl chloride 0.3-0.5 parts, acrylic acid 0.3-0.4 parts, trifluoroethyl methacrylate 1-1.5 parts and dopamine 0.4-0.6 parts; the prepared perovskite precursor can improve photoelectric conversion efficiency and stability.

This invention relates to the field of methyl ethyl ketone peroxide (MEKP) production technology, specifically to a method for preparing MEKP and its applications. The method includes the following steps: adding [BMIM]PF6 ionic liquid to a reaction vessel, followed by a composite catalyst, triethyl borate, and MEKP; cooling and then adding H2O2 dropwise, heating to 20-30°C, and adding a MnHCF dispersion; cooling the reaction solution to crystallize, and filtering to obtain preliminary MEKP crystals; recovering the ionic liquid by vacuum distillation of the filtrate; dehydrating the solution using a vacuum membrane; adding polyurethane acrylate and DPGDA, then coating the solution with a gelatin-gum arabic wall material, and spray drying to obtain MEKP. This invention effectively solves the core pain points in MEKP production and applications through triple innovation: MnHCF bimetallic catalysis, borate ester stabilization, and microcapsule safety design. It demonstrates significant advantages in catalytic efficiency, storage stability, safety performance, and practical applications.

The invention belongs to the technical field of boron compounds, and particularly relates to a preparation method of boron isotope enriched triethyl borate. The preparation method of the boron isotope-enriched triethyl borate comprises the following steps: reacting boron isotope-enriched boric acid, a metal hydride and ethanol, and after the reaction is completed, carrying out solid-liquid separation and distilling to obtain the boron isotope-enriched triethyl borate. According to the preparation method, boron isotope enriched boric acid solid is taken as a raw material, ethanol is taken as a reaction reagent and solvent, metal hydride is taken as a water removal agent, a reaction byproduct has relatively low solubility in ethanol so as to be easily removed, and the preparation of electronic grade boron isotope enriched triethyl borate can be realized through distillation without a catalyst such as concentrated sulfuric acid; the method does not need to depend on complex manufacturing equipment and purification technology, the synthesis process and the purification process are greatly simplified, and the production cost is reduced.

The invention relates to a preparation method of a hexafluoropropylene tripolymer, which specifically comprises the following steps: in a non-polar ester organic solvent, under the catalytic action of a fluorinating reagent, reacting hexafluoropropylene gas to generate the hexafluoropropylene tripolymer, the non-polar ester organic solvent is selected from at least one of dimethyl carbonate, diethyl carbonate, dipropyl carbonate, trimethyl borate, triethyl borate, ethyl oleate, ethyl silicate or pentaerythritol tetraethyl hexanoate, and the T3 isomer of the hexafluoropropylene tripolymer accounts for more than 80%. The preparation method disclosed by the invention is high in reaction selectivity, short in reaction time, few in byproducts, environment-friendly and suitable for industrial production; and the obtained hexafluoropropylene tripolymer has higher T3 isomer proportion, and can be used in the fields of liquid cooling industry, cleaning industry and the like.

The solid-liquid separation device comprises a solid-liquid separation chamber, supporting legs are connected to the two sides of the bottom of the solid-liquid separation chamber correspondingly, a feeding port is formed in the top of the solid-liquid separation chamber, a liquid outlet is formed in the bottom of the solid-liquid separation chamber, a base is connected to the bottoms of the two supporting legs, and a liquid outlet is formed in the bottom of the base. And a filter screen is installed at the position, close to the top, in the solid-liquid separation chamber, first limiting check blocks are arranged on the lower left portion and the lower right portion of the filter screen correspondingly, and non-woven fabric is arranged under the filter screen. According to the filtering and separating structure, the first limiting check block, the second limiting check block, the non-woven fabric and the grating are arranged and are matched with one another, so that the filtering and separating structure can be conveniently disassembled and assembled, the difficulty of cleaning the filtering and separating structure is reduced, and in addition, due to the arrangement of the non-woven fabric and the grating, the filtering and separating structure is convenient to clean. Therefore, the solid-liquid separation effect can be improved.