383 results about "Trichlorosilane" patented technology

The invention provides a preparation device and process of electronic-grade silane. According to the preparation device, a first disproportionation reaction is carried out on the basis of the first reactor, dichlorosilane is rectified and separated to serve as a raw material for a second disproportionation reaction, silane can be obtained on the basis of cheap trichlorosilane and a catalytic reagent, and electronic-grade silane can be obtained on the basis of traditional purification after rectification; based on heat exchange between tower top materials of the rectifying tower I and a tower kettle reboiler of the rectifying tower II, differential pressure thermal coupling integration is realized, condensing equipment and operation steps can be omitted, energy consumption is reduced, and the defects of high preparation cost and high energy consumption of a silane preparation device in the prior art are overcome.

The utility model discloses a device for removing impurities in trichlorosilane, relates to the technical field of polycrystalline silicon production, and mainly aims to improve the removal efficiency of the impurities in the trichlorosilane on the basis of not increasing the cost. According to the main technical scheme, the device for removing the impurities in the trichlorosilane is characterized in that an inlet of a first mixer is connected to one end of a first feeding pipe and a second feeding pipe, a plurality of baffle plates are arranged in a reaction tank in a staggered mode and used for forming a baffle channel in the reaction tank, and one end of the baffle channel is connected to an outlet of the first mixer; the other end of the baffling channel, the filter and an inlet of the separating tower are sequentially connected, the inlet of the separating tower is further connected to a siloxane conveying pipe, a tower kettle of the separating tower is connected to the other end of the first feeding pipe and used for guiding siloxane to the first mixer, and a top collecting pipe of the separating tower is connected to the rectifying unit; wherein the second feeding pipe is used for guiding a trichlorosilane and dichlorosilane mixture containing impurities to the first mixer.

The invention provides an epitaxial growth process for improving doping uniformity of n-type doped silicon carbide, and relates to the technical field of semiconductors. The method is based on a chemical vapor deposition growth technology; 11 to 20 gt; the silicon carbide epitaxial growth is carried out by taking silicon carbide with a 4-degree silicon surface in the direction as a substrate, taking trichlorosilane (TCS) and ethylene (C2H4) as growth sources and taking ammonia gas (NH3) as a doping source. Ammonia gas is adopted as an n-type dopant, the decomposition efficiency of the n-type dopant is close to 100% at the temperature of 700 DEG C or above, and the energy of N-H bond breakage of ammonia gas molecules is 390 KJ / mo which is far lower than 946 KJ / mo needed by N-N bond breakage of nitrogen molecules. Therefore, compared with a traditional doping source such as nitrogen, the ammonia gas has higher doping efficiency, residues of excessive nitrogen-containing precursors in the reaction chamber can be reduced, the memory effect is reduced, and thus more excellent in-chip uniformity and stable inter-chip repeatability of the epitaxial wafer are obtained. The selection range of the doping source is widened, the accurate control of the doping concentration is realized, and the stability of the doping concentration in the continuous growth process is improved.

The invention relates to a corrosion-resistant flame-retardant cable and a preparation method thereof, and belongs to the technical field of special flame-retardant cables. The cable is composed of a bunched wire core and a protective sleeve on the surface, and the protective sleeve is prepared from, by weight, 100 parts of PVC resin, 10-15 parts of POE resin, 12-16 parts of insulating filler, 25-30 parts of flexibilizer, 4.8-5.5 parts of stabilizer, 9-13 parts of modified phosphorus-silicon flame retardant, 0.13-0.16 part of antioxidant and 4.5-5.8 parts of lubricant. The modified phosphorus-silicon flame retardant is substituted by hydroxyl single-terminated silicone oil and vinyl trichlorosilane to form a compound with multiple silicon chains and alkenyl, namely an intermediate, DOPO and the alkenyl on an intermediate molecule are subjected to addition, DOPO serving as a phosphorus flame-retardant material is grafted to the intermediate molecule, a large number of silicon chain-DOPO-PVC layered structures are formed in the near surface layer of the protective sleeve, and the flame-retardant protective sleeve is formed. And the shielding, corrosion-resistant and flame-retardant effects are achieved.

The invention relates to a glass fiber reinforced PET composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is prepared from the following raw materials in parts by weight: 100 parts of PET (Polyethylene Terephthalate) master batch, 32 to 45 parts of modified glass fiber, 0.19 to 0.24 part of nucleating agent, 1.6 to 2 parts of lubricating agent and 0.12 to 0.15 part of antioxidant, the modified glass fiber is prepared by grafting sulfydryl on the surface of glass fiber by KH-580 to prepare sulfhydrylated glass fiber, reacting tert-butyldimethylamine with 2-bromoethanol to form hydroxyl-terminated quaternary ammonium salt, substituting with octylene trichlorosilane to form a modifier, and adding alkenyl containing alkyl long chains introduced into the modifier molecule with the sulfydryl grafted on the surface to prepare the modified glass fiber. Introducing modifier molecules to the surfaces of the glass fibers; and the modified glass fiber improves the strength of the composite material and keeps high impact resistance.

The invention relates to a high-gloss high-glass-fiber-content nylon 66 composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is prepared from the following components in percentage by weight: 50 to 60 percent of alkali-free glass fiber, 2.2 to 3.5 percent of highlight compatibilizer, 3.5 to 5 percent of flexibilizer, 0.15 to 0.2 percent of antioxidant, 0.6 to 0.9 percent of processing aid and the balance of nylon 66 resin, the high-gloss compatibilizer is prepared by the following steps: substituting n-alkyl alcohol and vinyl trichlorosilane to prepare an intermediate 1, initiating addition by methyl mercaptoacetate and unsaturated double bonds of the intermediate 1 to prepare an intermediate 2, and finally performing amine ester exchange on gamma-aminopropyltriethoxysilane and terminal methyl ester of the intermediate 2. The highlight compatibilizer effectively reduces the content of a high crystal region-low crystal region interface in a composite system and reduces scattering of light, so that the composite material keeps higher glossiness.

The utility model relates to the technical field of polycrystalline silicon production equipment, in particular to a trichlorosilane purification system in a polycrystalline silicon production process, which is characterized in that a coarse distillation primary tower is communicated with a cold hydrogenation primary separation tower; the low-boiling-point recovery tower is communicated with the primary crude distillation tower; the crude distillation secondary tower is communicated with the crude distillation primary tower; the rectification primary tower is communicated with the crude distillation secondary tower; the high-boiling recovery tower is communicated with the rectification primary tower; the rectifying secondary tower is communicated with the rectifying primary tower; the rectification secondary tower is communicated with the crude distillation primary tower; the third-stage rectification tower is communicated with the second-stage rectification tower; a tower kettle of the third-stage rectification tower is communicated with the first-stage rectification tower; the light component removal tower is communicated with the low-boiling-point recovery tower and the high-boiling-point recovery tower; the heavy component removal tower is communicated with the light component removal tower; the high-boiling recovery tower is communicated with the tower kettle of the de-heavy tower; a gas phase outlet of the heavy component removal tower is sequentially connected with a gas phase adsorption device and a light component tower; a reflux inlet of the light component tower is communicated with the light component removal tower; and the heavy separation tower is communicated with the light separation tower. According to the utility model, the stability and reliability of large-load operation of the rectification system can be improved.

The invention relates to a preparation method and application of a long-acting antibacterial hydrophobic fabric, and belongs to the technical field of functional fabric materials. Aiming at the problems of antibacterial agent loss, hydrophobic function decline and antibacterial and hydrophobic synergism failure after repeated washing of the fabric, the method comprises the following steps: pre-treating the fabric to remove impurities, and constructing a functional layer step by step: immersing polyester or cotton fabric into a 2-8wt% chitosan quaternary ammonium salt aqueous solution, and carrying out vacuum pressurization impregnation at 75-85 DEG C to form an antibacterial layer; mixing octadecyl trichlorosilane with deionized water to prepare a pre-hydrolyzed emulsion, diluting the pre-hydrolyzed emulsion, and spraying the diluted pre-hydrolyzed emulsion on the surface of the fabric in a graded gradient manner to construct a hydrophobic layer; and finally, curing at 60-80 DEG C to form a coating layer. The fabric prepared by the method has lasting antibacterial property, super-hydrophobicity and blood adhesion resistance, can be used for medical protective articles such as operating gowns and medical bed sheets needing high-frequency cleaning, and can effectively prevent cross infection.

The invention provides a preparation method of a coated particle dispersion fuel, which comprises the following steps: mixing silicon carbide powder and a binder according to a preset mass ratio, banburying and granulating to obtain a silicon carbide matrix feed; printing a silicon carbide shell green body by using powder extrusion printing equipment and the silicon carbide matrix feed; degreasing the silicon carbide shell green body by using a degreasing solvent to obtain a silicon carbide shell brown blank; a cavity of the silicon carbide shell brown blank is filled with cladding fuel particles, and pores of the cladding fuel particles are filled with silicon carbide powder; and filling the filled silicon carbide shell brown blank into a chemical vapor infiltration device, generating silicon carbide by the introduced methyl trichlorosilane, filling a gap between the silicon carbide powder and the silicon carbide shell green blank with the silicon carbide, and obtaining the coated particle dispersion fuel after the chemical vapor infiltration is completed. By adopting powder extrusion printing and chemical vapor infiltration methods, the problems that the irradiation swelling resistance of existing coated particle dispersion fuel is reduced, the heat conductivity is low, and the loading capacity of coated fuel particles is limited are solved.

The invention relates to a perovskite photovoltaic cell high-transmittance low-scattering coating material and a preparation method thereof, and belongs to the technical field of photovoltaic cells. The coating material is prepared from the following components in percentage by weight: 7.2 to 8.5 percent of PMMA (Polymethyl Methacrylate) resin, 0.17 to 0.22 percent of modified nano titanium dioxide, 0.09 to 0.11 percent of flatting agent, 0.03 to 0.04 percent of defoaming agent and the balance of solvent, the modified nano titanium dioxide is prepared into an intermediate through addition reaction of triallylamine and mercaptoethanol, and then a modifier with a network molecular structure is formed through substitution reaction of trifluoropropyl trichlorosilane and hydroxyl at the end part of an intermediate molecule; a thioether chain segment in a modifier molecule and similar nitrogen and oxygen elements form a strong chelation effect to coat the nano titanium dioxide; the introduction of the modified nano titanium dioxide makes up the problem of light transmission reduction caused by traditional titanium dioxide reinforcement.

The invention provides a rectification system and a rectification method for trichlorosilane multi-tower differential pressure coupling. In the rectification system, a tower kettle outlet of a primary coarse distillation tower is communicated with a raw material inlet of a secondary coarse distillation tower; a tower top outlet of the crude distillation secondary tower is communicated with a first reboiler and a fourth reboiler respectively and then is communicated with a raw material inlet of the crude distillation tertiary tower; a tower top outlet of the crude distillation third-stage tower is communicated with a raw material inlet of the rectification first-stage tower, a tower kettle outlet of the rectification first-stage tower is communicated with a raw material inlet of the rectification second-stage tower, and a tower kettle outlet of the rectification second-stage tower is communicated with a raw material inlet of the crude distillation third-stage tower; a tower top outlet of the primary reduction tower is communicated with a fifth reboiler, and a tower top outlet of the secondary rectification tower is communicated with a third reboiler and then is subjected to a reduction process. According to the system, the reflux ratio of the primary crude distillation tower to the primary rectification tower can be reduced, the energy consumption in the trichlorosilane rectification process can be effectively saved, and the equipment investment and operation cost can be reduced.

The invention relates to a wear-resistant high-strength glass protection safety film and a preparation method thereof, and belongs to the technical field of safety films. The silicon carbide whisker, the modified nano titanium dioxide and the graphene oxide are jointly prepared into the composite filler, and the strength and the wear resistance of the film are remarkably improved by utilizing the three-dimensional network structure of the silicon carbide whisker, the efficient filling and reinforcing effects of the nano titanium dioxide and the layered structure reinforcement of the graphene oxide; the permeation of small molecular substances such as moisture and oxygen is effectively blocked, and the barrier property of the membrane is improved. Meanwhile, the silane coupling agent is added, so that the compatibility and dispersity of the composite filler and the water-based resin emulsion are improved. The surface of the membrane is modified by heptadecafluorodecyl trichlorosilane, the hydrophobic performance of the membrane is remarkably enhanced, water vapor condensation and dust and dirt accumulation are reduced, meanwhile, the durability of the membrane is improved, and the wear resistance of the membrane is enhanced through chemical bonding.

The invention discloses a preparation method of regenerated polyester fibers, and relates to the technical field of polyester fibers. According to the invention, (4-formylphenyl) phosphonic acid and 2-(3-nitroaniline) acethydrazide are combined to form a Schiff base structure, so that an antibacterial effect is realized, and meanwhile, phosphorus is introduced, so that flame-retardant and anti-wear effects are realized; then, a modified wear-resistant agent with a cross-linked network structure is formed with butanediol, so that the wear-resistant effect of the fiber is remarkably enhanced; then 1, 7-octadiene-3-alcohol and octylene trichlorosilane are copolymerized to prepare a modifier, a cross-linked network structure is formed, the wear-resistant effect is enhanced, meanwhile, flame combustion can be inhibited, and the flame-retardant effect is achieved; then, the hydroxylated carbon nanotubes attract a modifier to be subjected to in-situ polymerization on the surfaces of the hydroxylated carbon nanotubes to prepare modified carbon nanotubes, so that the dispersity of the carbon nanotubes is improved, fiber falling is prevented, and the wear resistance of the material is improved; finally, the regenerated polyester fibers, the modified wear-resistant agent and the composite modified carbon nanotubes are mixed, melted and spun, so that the wear-resistant, antibacterial and flame-retardant effects are achieved.

The invention relates to the technical field of organic silicon resin preparation, in particular to trapezoidal methyl silicon resin and a preparation method thereof.The trapezoidal methyl silicon resin is prepared by taking methyl trichlorosilane as a main raw material, introducing a trapezoidal control agent containing amido and alkoxy at the same time to inhibit the reaction activity of the methyl trichlorosilane and then carrying out hydrolysis reaction in a small amount of alcohol solvent and water; the generation of a cross-linked network structure insoluble substance during hydrolysis is avoided, and the resin gelation risk is effectively reduced. The hydrolysis rate is reduced, so that the use amount of the solvent is reduced, the proportion of alcohol in the water phase is greatly reduced, and the process and environmental protection cost is reduced. The trapezoidal methyl silicone resin prepared by the method is excellent in viscosity performance, high in yield, excellent in boiling resistance, short in curing time, high in resin softening point and short in gelation time.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention belongs to the technical field of trichlorosilane purification, and discloses an adsorbent for adsorbing phosphorus impurities in trichlorosilane and a preparation method and application thereof.The preparation method comprises the steps that activated carbon is immersed in a solution containing ammonium metavanadate and oxalic acid, ultrasonic treatment and drying are conducted, and a vanadium oxide / carbon material mixture is obtained; calcining the vanadium oxide / carbon material mixture, and performing reduction treatment to obtain the oxygen vacancy-rich activated carbon loaded vanadium oxide adsorbent. The activated carbon loaded vanadium oxide adsorbent rich in oxygen vacancies is prepared by using a dipping-calcining-reducing method, and phosphorus impurities are adsorbed and removed by using the interaction of the activated carbon loaded vanadium oxide adsorbent and PCl3. The active carbon loaded vanadium oxide adsorbent rich in oxygen vacancies interacts with PCl3, so that trace PCl3 can be efficiently removed.

The invention belongs to the technical field of chlorosilane synthesis, and relates to a method for preparing phenyl trichlorosilane by using a trichlorosilane byproduct and the prepared phenyl trichlorosilane. The method comprises the following steps: firstly, taking metal silicon powder and hydrogen chloride gas as raw materials, reacting in a synthetic furnace under the action of a catalyst, and dedusting and cooling a reaction product to obtain a trichlorosilane crude product; rectifying the trichlorosilane crude product to obtain a high-boiling-point substance; and finally, under the irradiation of ultraviolet light, reacting the high-boiling-point substance serving as a raw material with chlorobenzene, and performing low-boiling-point removal and rectification to obtain the phenyl trichlorosilane. According to the method, the trichlorosilane by-product can be effectively utilized, and the problems of high cost, serious material waste and serious environmental pollution in the treatment process of the trichlorosilane by-product in the prior art are solved. The method is mild in condition and low in equipment requirement, and phenyl trichlorosilane can be prepared without a high-temperature thermal condensation reaction. According to the phenyl trichlorosilane obtained by the method, the yield is close to 80%, impurities are few, and the gas phase content reaches 99% or above.

The invention discloses a main shaft lifting and rotating device for vapor deposition equipment and a using method, and relates to the technical field of vapor deposition equipment.The main shaft lifting and rotating device comprises a support, a chemical vapor deposition furnace is fixedly installed on the top face of the support, and a furnace door is installed on the front side wall of the chemical vapor deposition furnace through a connecting piece; the lifting and rotating mechanism is arranged in the furnace door, the lifting and rotating mechanism comprises a base, a mounting groove is formed in the top surface of the base, a servo motor is fixedly mounted in the mounting groove, and the top surface of the base is rotationally connected with a main shaft body. Real-time monitoring and accurate control of the concentration of mixed gas in the reaction chamber are achieved, an electrochemical sensor, a resistance-type semiconductor sensor and a heat-conducting gas sensor in the detection assembly can accurately measure the concentration of methyl trichlorosilane, the concentration of hydrogen and the concentration of argon respectively, and comprehensive monitoring of gas components in the reaction chamber is guaranteed.

The system comprises a gradient catalytic reaction rectifying tower and a temperature control system, the rectifying tower is sequentially provided with a rectifying section, a reaction section and a stripping section from top to bottom, the reaction section is filled with an ion exchange resin solid catalyst, and the stripping section is filled with an ion exchange resin solid catalyst. The radiuses of the catalyst bag units are distributed in a gradient mode from small to large along the height of the tower, the catalyst bag units have the functions of catalytic reaction and mass transfer separation, the rectifying section and the stripping section are filled with structured packing or high-separation-capacity metal wire mesh packing, a gas-liquid separator is arranged at an outlet of the stripping section, and a temperature control system achieves segmented monitoring through a multi-point temperature sensor. The surface of the catalyst can be subjected to functional treatment to improve the decomposition resistance; the method comprises the following steps: feeding trichlorosilane generated by cold hydrogenation into the upper part of a reaction section from a feed port, carrying out disproportionation reaction at the gradient temperature of 20-100 DEG C and the pressure of 0.3-0.6 MPa according to the reflux ratio of (15-30): 1 to generate silane, and carrying out rectification and extraction separation to obtain high-purity silane with the purity of 99.999% or above.

The invention provides an efficient trichlorosilane synthetic furnace and an intelligent temperature control method thereof. The efficient trichlorosilane synthetic furnace comprises a reactor body and an intelligent temperature control module, the reactor body comprises a shell; the shell comprises a conical area and a cylindrical area; the cylindrical area sequentially comprises a lower-section reaction area, a middle-section reaction area and an upper-section reaction area from bottom to top, and cooling devices are independently arranged on the outer sides of the reaction areas respectively; an internal part is arranged in the lower section reaction area; the intelligent temperature control module comprises a temperature sensor unit, an intelligent control unit and a flow adjusting unit. According to the invention, by arranging the internal part and the intelligent temperature control module, intelligent temperature control is realized, the temperature uniformity of each reaction area in the trichlorosilane synthetic furnace is effectively improved, and the conversion rate of trichlorosilane is greatly improved.

The invention relates to the technical field of trichlorosilane processing, in particular to equipment and method for removing boron and phosphorus impurities from trichlorosilane, the equipment comprises an adsorption column used for adsorbing trichlorosilane, the adsorption column is filled with an adsorbent, and the adsorbent is specially used for removing the boron and phosphorus impurities in trichlorosilane; the jacket is arranged on the outer wall of the adsorption column and is used for regulating and controlling the temperature in the adsorption column, a pipeline connected with the jacket is divided into an inlet part and an outlet part, and the inlet part and the outlet part are respectively provided with a regulating valve and a stop valve and are used for controlling a medium and flow which are introduced into the jacket. A multi-section adsorbent and a jacket temperature control system are adopted, so that boron and phosphorus impurities in trichlorosilane are efficiently removed. The design of the multi-section adsorbent allows different types of adsorbents to selectively adsorb specific impurities, so that the removal efficiency is improved. And each adsorbent can exert the optimal performance under different temperature and pressure conditions.

The invention relates to the technical field of chemical engineering, and discloses a trichlorosilane hydrogen reduction polycrystalline silicon growth monitoring system fusing multi-source data. Comprising a multi-sensor monitoring module, a multi-sensor data acquisition module, a multi-source data preprocessing module, a growth process data analysis module, a growth state online evaluation module, a process parameter online regulation and control module, a regulation and control result feedback module and a system collaborative management module, the multi-sensor monitoring module monitors the growth process of trichlorosilane hydrogen reduction polycrystalline silicon through multiple sensors, the multi-sensor data acquisition module acquires original data, the multi-source data preprocessing module preprocesses the data, the growth process data analysis module carries out data calculation, and the growth state online evaluation module carries out online comprehensive evaluation. The process parameter online regulation and control module regulates and controls process parameters online, the regulation and control result feedback module generates an adjustment strategy, and the system collaborative management module performs system parameter recording and storage, system optimization and exception handling.

The invention discloses a method for co-producing triphenylphosphine and silicon tetrachloride, which comprises the following steps: S1, mixing triphenylphosphine oxide with a solvent, heating to 90-110 DEG C, and dropwise adding trichlorosilane to carry out reduction reaction; the reaction pressure is controlled to be 0.12 to 0.20 Mpa absolute pressure; s2, the reaction temperature is kept not lower than 90 DEG C, preferably 90-110 DEG C, meanwhile, the system pressure is adjusted to be negative pressure, and the reaction continues for 0.5-3 h; and after the reaction is completed, rectifying and separating out silicon tetrachloride, adding water into the residual reaction liquid for quenching, filtering out insoluble substances, and removing the solvent to obtain the triphenylphosphine. According to the method, high-purity triphenylphosphine can be obtained with high yield, the electronic-grade silicon tetrachloride is co-produced, the generation of silicon dioxide is reduced, the gel coating problem of the silicon dioxide and the product loss are reduced, the post-treatment is more convenient, and the method is suitable for industrial production.

The invention discloses an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) detection method for phosphorus in trichlorosilane, and belongs to the field of analysis of high-purity electronic chemicals. According to the invention, a low-temperature matrix digestion technology is adopted to quantitatively form a SiFcomplex and inhibit silicon volatilization loss; according to the matrix matching calibration system, a calibration curve is constructed by adopting a weighted least square method, so that matrix interference is effectively corrected; a detection technology screening strategy is carried out by combining a cascade strategy of high-resolution inductively coupled plasma mass spectrometry, so that the interference of a complex matrix is successfully avoided. Experiments show that when the method is used for detecting phosphorus, the linear correlation coefficient R is greater than 0.999, the detection limit is as low as 0.02 ng / g, and the method accords with ISO 17025 and semiconductor-grade material quality control standards, and is suitable for accurate quantitative analysis of ng / g-grade phosphorus elements in high-purity trichlorosilane.

The utility model provides a system for synthesizing trichlorosilane. The system for synthesizing trichlorosilane comprises a trichlorosilane synthesis reaction device, a first gas-solid separation unit, a first tail gas treatment unit, a silicon tetrachloride hydrogenation reaction device, a second gas-solid separation unit, a second tail gas treatment unit and a product separation and purification unit. According to the system, through the technological process of fusing the trichlorosilane synthesis reaction and the silicon tetrachloride hydrogenation reaction, efficient utilization of silicon powder, hydrogen and silicon tetrachloride is achieved, the investment and operation cost is saved, and meanwhile the raw material consumption is reduced.

The invention discloses an antibacterial epoxy resin coating and a preparation method thereof, and relates to the technical field of coatings. According to the invention, the 5-phenylpent-2, 4-dienoic acid is esterified and combined with the side chain of the epoxy resin, so that the hardness and heat resistance of the cured coating are improved; then addition reaction with dimethyl diallyl ammonium chloride, 2-acrylamide phenylboronic acid and the modified antibacterial agent is performed to form a three-dimensional network structure, so that the mechanical strength of the coating is remarkably enhanced, the antibacterial, high-adhesion and anti-stripping effects are achieved, a phenylboronic acid structure is assisted, a protective film is formed on the surface of an object, the object is effectively isolated from the external environment, and the service life of the coating is prolonged. Oxidation and corrosion of the object surface are prevented, and the corrosion-resistant effect is achieved. According to the modified antibacterial agent, S-adenosine-L-homocysteine and silver nitrate are subjected to a coordination reaction, and the antibacterial effect is achieved; then, the silicon dioxide is combined with vinyl trichlorosilane, silane groups are introduced, after curing, the mechanical strength and water resistance of the coating are remarkably enhanced, corrosive liquid is prevented from entering the coating, and the corrosion-resistant effect is indirectly improved.

The invention discloses a low-expansion silicon-carbon negative electrode material and a preparation method thereof, and belongs to the technical field of secondary batteries. The invention relates to a preparation method of a low-expansion silicon-carbon negative electrode material. The preparation method comprises the following steps: S1, depositing SiO2: depositing porous carbon for the first time by adopting silane with at least two ethyoxyl groups or methoxyl groups; then calcining to obtain a SiO2 deposition layer; s2, silicon deposition: carrying out secondary deposition on the material obtained in the step S1 by adopting monosilane, disilane and / or trichlorosilane; and S3, carbon coating: carrying out carbon coating on the material obtained in the step S2 by using a carbon source gas. According to the low-expansion silicon-carbon negative electrode material disclosed by the invention, porous carbon is firstly subjected to deposition modification by utilizing SiO2 deposition, so that the overall structural strength of a framework is improved; after silane deposition, silicon of the second deposition layer and silicon dioxide of the first deposition layer can react to generate SiO, and volume expansion of silicon crystal grains can be relieved.

The invention provides a continuous synthesis system of gamma-chloropropyltrichlorosilane. The continuous synthesis system comprises a trichlorosilane storage tank, a chloropropene storage tank, a catalyst storage tank, a static mixer, an n-stage series tubular reaction system and a rectification device, the tubular reaction system comprises a tubular reactor, a back pressure valve, a degassing device and a condenser; a liquid phase outlet of the degassing device and a liquid phase outlet of the condenser are connected with a next-stage tubular reactor; the trichlorosilane storage tank, the chloropropene storage tank and the catalyst storage tank are respectively connected with an inlet of the static mixer, and an outlet of the static mixer is connected with the first-stage tubular reactor; the inlet feed of the second to nth stages of tubular reactors comprises chloropropene; a liquid phase outlet of the nth-stage degassing device is connected with an inlet of the rectification device, and the rectification device is connected back to the first-stage tubular reactor and outputs a gamma-chloropropyltrichlorosilane product. The reaction efficiency and the conversion rate are improved, and the production energy consumption and the cost are low. The invention further provides a synthesis method based on the system, and the technological process is simple.

The utility model relates to a trichlorosilane adsorption tower in the technical field of adsorption equipment, which comprises a tower body, an air inlet pipe and an emptying pipe are arranged at the bottom of the tower body, and an exhaust pipe is arranged at the top of the tower body; the interior of the tower body is divided into a spraying area and an adsorption area from bottom to top, a spraying pipe is arranged at the top of the spraying area, a spherical gas distribution plate is arranged at the bottom of the spraying area, gas distribution holes are fully distributed in the gas distribution plate, and the gas inlet pipe is located below the gas distribution plate; the adsorption area comprises a filler layer, the filler layer is an activated carbon layer, a heat exchange assembly is arranged in the filler layer, the heat exchange assembly comprises a coiled pipe, and the coiled pipe is connected with a medium inlet pipe and a medium outlet pipe. According to the utility model, trichlorosilane can be subjected to impurity removal and purification after spraying and adsorption in sequence, the efficiency is high, and the effect is good; the temperature of the filler area can be flexibly adjusted according to needs, the adsorption effect can be improved, the filler can be purified, and the next adsorption effect is not affected.

The utility model discloses an energy-saving rectification system for electronic-grade silane gas production. The energy-saving rectification system comprises a stripping tower condenser arranged on a stripping tower, and a trichlorosilane evaporator connected with a trichlorosilane tower, the trichlorosilane tower is respectively connected with a stripping tower reboiler arranged on the stripping tower and a dichlorosilane reboiler arranged on the dichlorosilane tower, the trichlorosilane tower is connected with a trichlorosilane return tank through a trichlorosilane air cooler, and the trichlorosilane return tank is respectively connected with the trichlorosilane tower and the dichlorosilane tower; the dichlorosilane tower is provided with a dichlorosilane air cooler, the dichlorosilane air cooler is connected with a dichlorosilane return tank, and the dichlorosilane return tank is respectively connected to the dichlorosilane tower and the second reactor feeding preheater; a discharge preheater of the first reactor is connected to a trichlorosilane tower, a discharge port of the second reactor is connected with a silane tower, and the silane tower is respectively connected with a dichlorosilane tower and a post-stripping tower. Therefore, efficient production of the electronic-grade silane gas is realized.