71 results about "Chlorosilane" patented technology

This invention relates to the field of organosilicon compound synthesis technology, specifically to a method for preparing pentaphenyltrimethyltrisiloxane and its application. The preparation method includes: S1, mixing diphenylmethylchlorosilane and methylphenyldichlorosilane for co-hydrolysis to obtain an intermediate raw material; S2, adding a catalyst to the intermediate raw material under vacuum to carry out a catalytic polymerization reaction to obtain a polymer product; S3, vacuum distilling and extracting the target component from the polymer product obtained in step S2 to obtain pentaphenyltrimethyltrisiloxane. The preparation method of this invention, by adjusting the raw material ratio, selecting a suitable catalyst, controlling its dosage, limiting the polymerization process parameters, and precisely controlling the distillation separation conditions, achieves a product purity of over 99% and a refractive index stable between 1.5765 and 1.5790, while also improving industrial production efficiency and meeting the product quality requirements of high-end fields.

The application relates to the technical field of organic silicon synthesis, and particularly discloses a high-selectivity platinum catalyst and a vinyl double-seal head synthesis method. The high-selectivity platinum catalyst comprises a carrier and a platinum active component loaded on the carrier, the platinum active component is obtained by reducing and activating a platinum precursor and a ligand under a hydrogen atmosphere at 250-350 DEG C after coordination modification, and the molar ratio of the ligand to the platinum element in the platinum precursor is 2-3:1. In the application, the platinum active component is obtained by reducing and activating the platinum precursor and the ligand after coordination modification, and the ligand and the platinum element form a specific coordination structure of the platinum active center, guide the direct silicon-hydrogen addition reaction of acetylene and a hydrogen-containing double-seal head, thus the dimethyl chlorosilane intermediate is not needed, the process flow is simplified, and the effects of improving the reaction yield, environmental protection and process economy are achieved.

This invention provides a weather-resistant metal protective coating and its preparation method. The weather-resistant metal protective coating comprises a modified epoxy resin, modified carbon nanotubes, a curing agent, an initiator, and a diluent. The modified epoxy resin is prepared by reacting epoxy resin sequentially with methyldodecyl dichlorosilane and hydroxyethyl methacrylate ethyl phosphate. The modified carbon nanotubes are prepared by reacting carboxylated carbon nanotubes with 3-(methacryloyloxy)propyltrimethoxysilane. The weather-resistant metal protective coating prepared by this invention exhibits excellent anti-corrosion, anti-aging, and mechanical properties.

This invention discloses a modified polysilazane, a two-component silicone sealant, and a method for preparing the same. The modified polysilazane is prepared through a nucleophilic substitution reaction of dimethyldichlorosilane, vinyltrichlorosilane, and ethylenediamine. The two-component silicone sealant prepared using the modified polysilazane of this invention significantly improves its hardness under sealed conditions without adversely affecting its curing and performance. Furthermore, it requires a small amount and is highly practical. The two-component silicone sealant prepared using the modified polysilazane of this invention exhibits high hardness retention under sealed conditions, significantly slows down the reversion phenomenon, and maintains good mechanical properties and adhesion even after curing at 90°C under sealed conditions. It also demonstrates excellent resistance to reversion under fully sealed conditions.

The present disclosure relates to methods of forming silicon-on-insulator substrates. A method of forming an SOI substrate includes performing a hydrogen thermal treatment on a pretreated sacrificial wafer at an elevated temperature. A stop layer and a semiconductor layer can be sequentially formed on a first surface of the sacrificial wafer on which the hydrogen (H2) thermal treatment was performed. The stop layer and the semiconductor layer can be formed by an epitaxial growth process using a hybrid precursor including monosilane (MS) and dichlorosilane (DCS) sources.

A method of forming an SOI substrate including a hydrogen thermal treatment performed on a pretreated sacrificial wafer, under high temperature. A stopper layer and a semiconductor layer may be sequentially formed on a first surface of the sacrificial wafer on which the hydrogen (H2) thermal treatment was performed. The stopper layer and the semiconductor layer may be formed by an epitaxial growth process using a mixed precursor including a monosilane (MS) source and a dichlorosilane (DCS) source.

This invention provides a high-weather-resistant solar heat-reflective coating and its preparation and application methods. The coating system consists of a low-surface-energy long-chain silane coupling agent, a low-surface-energy solvent, and functional pigment and filler nanoparticles. The preparation process is simple and mild, requiring no vacuum equipment or complex processes, effectively solving problems in existing technologies such as insufficient solar reflectivity, poor long-term weather resistance, and susceptibility to surface contamination. The long-chain silane coupling agent is selected from perfluorooctyltrichlorosilane, perfluoroquinolyltrichlorosilane, perfluorooctyltriethoxysilane, polydimethylsiloxane, or hexadecyltrichlorosilane; the low-surface-energy solution is selected from ethanol, propanol, or acetone; the pigment and filler nanoparticles include titanium dioxide, barium sulfate, aluminum oxide, calcium carbonate, silicon dioxide, or zinc oxide, with a particle size ranging from 10 nm to 5 μm. The volume ratio of each component is pigment and filler nanoparticles: low-surface-energy solution: long-chain silane coupling agent = 1–5: 5–10: 0.1–0.3.

The application discloses a synthesis method of an aluminum-containing high-molecular-weight polycarbosilane, and comprises the following steps: S1, preparing a homogeneous solution of liquid polycarbosilane and trichlorosilane; S2, under the protection of an inert atmosphere, adding anhydrous aluminum chloride into the homogeneous solution, and condensing and refluxing under certain conditions until the anhydrous aluminum chloride is completely dissolved; and S3, removing unreacted small molecules through vacuum distillation to obtain a target product. The application has the following advantages: the preparation temperature is low, the process is environment-friendly and efficient, the process can be scaled up by equal proportion, and the prepared product has good stability at room temperature.

The utility model provides a kind of chlorosilane waste liquid treatment device, it is related to polysilicon technical field.The utility model includes heating mechanism, purging mechanism and absorption mechanism are communicated with heating mechanism, wherein, the heating mechanism includes heating seat, heating box is equipped on the heating seat, the purging mechanism includes the purging pipe being communicated with heating box, adjusting valve is equipped on the purging pipe, the absorption mechanism includes the first absorption tank being communicated with heating box, hydrogen fluoride is equipped in the first absorption tank.The utility model handles chlorosilane waste liquid in relatively gentle form, avoids the flash explosion phenomenon.

The application provides a method for absorbing hydrogen chloride in hydrogen gas in polysilicon production hydrogen recovery by using trichlorosilane, comprising the following steps: after cooling compression and chlorosilane separation treatment, the reduction tail gas enters an absorption tower, trichlorosilane is used as an absorbent in the absorption tower to absorb hydrogen chloride in hydrogen gas under high-pressure and low-temperature conditions, high-purity hydrogen gas is generated at the top of the absorption tower, and rich liquid is generated at the bottom of the absorption tower; the rich liquid is sent into a desorption tower to carry out desorption under low-pressure and high-temperature conditions, high-purity hydrogen chloride is generated at the top of the desorption tower, and regenerated lean liquid is generated at the bottom of the desorption tower; and the regenerated lean liquid is mixed with fresh supplemented trichlorosilane after cooling and then returned to the absorption tower to form a cycle.

This invention relates to the field of metallocene linear low-density polyethylene (MDPE) preparation technology, and particularly to a method for preparing long-chain branched metallocene polyethylene. The method comprises the following steps: A polymerization reaction is carried out in a high-pressure stainless steel reactor. A metallocene catalyst is added to the reactor with dried alkane, followed by ethylene, comonomers, and hydrogen gas, which is then introduced into the reactor. A mixed solution of dichlorosilane-functionalized non-conjugated α,ω-dienes and white oil is then added to the reactor. After stabilizing the reaction for 12-72 hours, excess steam is introduced for hydrolysis. The mixture is stirred for 1-4 hours and then discharged to obtain long-chain branched metallocene polyethylene. This invention achieves controlled molecular structure with controlled long-chain branching content, resulting in a product with high branching degree, suitable branch length, and uniform distribution. This increases the number of branched active sites and their uniform distribution, leading to excellent mechanical properties and low haze.

This invention provides a method for forming an SOI (Silicon on Insulator) substrate. [Solution] A method for forming an SOI substrate 100 according to an embodiment of the present invention includes the steps of performing a high-temperature H2 heat treatment on a pre-treated sacrificial wafer 110, and sequentially forming a stopper layer 111 and a semiconductor layer 112 on a first surface of the heat-treated sacrificial wafer 110. The stopper layer 111 and the semiconductor layer 112 are formed by epitaxial growth using a mixed precursor consisting of monosilane (MS) and dichlorosilane (DCS), respectively.

This invention discloses an organochlorosilane-modified zinc electrode sheet, its preparation method, and its application, belonging to the field of aqueous zinc-ion battery technology. The preparation method specifically includes the following steps: (1) acid washing and alcohol washing of the zinc electrode sheet sequentially; (2) arranging the electrode sheet on a glass petri dish and drop-coating with organochlorosilane; (3) sealing the top and treating with high temperature; (4) cooling to room temperature and allowing it to stand, washing with alcohol, and allowing it to stand again to obtain the electrode. The organochlorosilane-modified layer of this invention has hydrophobic properties and possesses zinc-loving ion sites. The zinc electrode sheet (OTS-Zn) prepared thereby has lower interfacial resistance, good cycle stability, and rate performance, improving problems such as dendrite growth and hydrogen evolution reaction at the interface of traditional zinc anodes.

The application relates to a high-elastic-modulus UHPC and a preparation method thereof, and belongs to the technical field of concrete. In view of the problem that the existing super-micro filler has limited elastic modulus improvement due to insufficient filling and interface modulus fault, the application first prepares a sol from tetraethyl orthosilicate, fly ash and an aluminum salt, generates a mullite shell layer on the surface of aluminum oxide in situ to obtain a composite matrix; then the sol is subjected to mercaptoization through KH-580, and is subjected to substitution reaction with monododecyl nonaethylene glycol ether and vinyltrichlorosilane to obtain a modified composite filler which is grafted with an amphiphilic branched structure on the surface; the filler can self-drive migration into the micro-nano gap of UHPC, simultaneously form an aluminum oxide core-mullite shell-organic layer-hydrated product modulus gradient, realize efficient filling and stress gradient transmission, and achieve the purpose of improving the elastic modulus of UHPC.

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

The application discloses a preparation method of long-chain alkyl green silane coupling agent, comprising the following steps: step one, 10-undecene-1-ol is reacted with chlorosulfoxide under the conditions of low-temperature dropwise adding and medium-temperature preservation, and 11-chloro-1-undecene is obtained through vacuum rectification purification; step two, under the action of a platinum catalyst, 11-chloro-1-undecene is subjected to addition reaction with trichlorosilane, excessive raw materials are removed, and 11-chloro undecyl trichlorosilane is obtained through rectification; step three, 11-chloro undecyl trichlorosilane is subjected to alkoxylation reaction with biological methanol or biological ethanol, by-products and excessive biological alcohol are removed, and high-purity long-chain alkyl green silane coupling agent is obtained through rectification. The carbon sources of raw materials are all biological, the method is green and low-carbon, the product has a long-chain structure, and the product has flexibility, fatigue resistance and aging resistance, and can be further derived into functional silane such as amino, mercapto and thiocyanogen; the long-chain alkyl green silane coupling agent can be widely applied to high-end flexible composite materials such as flexible electronics and robot joints, and effectively improves the service life and safety of the materials.

This utility model discloses a system for removing impurities from carbon-containing chlorosilanes and recovering chlorosilanes, comprising: a first distillation column for receiving and concentrating carbon-containing chlorosilanes; a first adsorption and reaction device connected to the first distillation column, the first adsorption and reaction device being filled with a metal adsorbent material and equipped with a silicon tetrachloride feed pipeline; a second adsorption and reaction device connected to the first adsorption and reaction device, the second adsorption and reaction device being filled with a methyldichlorosilane adsorbent material; a second distillation column connected to the second adsorption and reaction device; and a third distillation column connected to the second distillation column. This utility model can adsorb and concentrate metal impurities in carbon-containing chlorosilanes as a catalyst for the carbon removal reaction, effectively avoiding deactivation and failure caused by metal impurities encapsulating the resin catalyst, improving the conversion rate of methyldichlorosilane, and effectively avoiding the disproportionation reaction of silicon trichloride in the presence of the resin catalyst, thereby improving the carbon removal efficiency and chlorosilane recovery efficiency.

This utility model relates to the field of silicone oil waste gas treatment technology, and discloses a silicone oil reactor waste gas collection and treatment device, including a collection component. The collection component is used for waste gas collection and treatment. The collection component includes an outer pipe body, an inner pipe body, a flange end, and a guide block. The inner pipe body is sleeved inside the outer pipe body. Each end of the outer pipe body and the inner pipe body is fixedly connected to a flange end. The guide block array is arranged inside the inner pipe body, and each guide block is fixedly connected to the inner wall of the inner pipe body. Through the cooperation of the internal components of the collection component, heat transfer oil is continuously injected into the space between the outer pipe body and the inner pipe body. The heat transfer oil keeps the internal space warm and prevents the internal space temperature from falling below the dew point, which would cause the chlorosilane monomers in the waste gas to undergo hydrolysis reaction. The generated silanols then condense into viscous siloxane polymers. The components in the guide block guide the waste gas, accelerates and prevents backflow.

This invention relates to a non-stop maintenance process and apparatus for chlorosilane production. The apparatus comprises, in sequence, a hydrogen main, a second switching valve, a hydrogen buffer tank, a ninth switching valve, a hydrogen compressor, a static mixer, a first heat exchanger, a seventh switching valve, a heater, and a fluidized bed reactor. The other inlet of the static mixer is connected in sequence to the STC buffer tank and the tenth switching valve. The first and second ends of the first heat exchanger are respectively connected to the outlet of the static mixer and one end of the seventh switching valve. The third end of the first heat exchanger is connected to subsequent processes via a sixth switching valve, and the second end of the first heat exchanger is connected to subsequent processes via a first branch and a fifth switching valve. This maintenance process and apparatus prevents bed damage and material clogging at the bottom and internal components of the tower during fluidized bed cooling and depressurization, reducing the workload during fluidized bed restart and avoiding personnel entering confined spaces, thus reducing the risk of accidents.

This invention provides a polycrystalline silicon HCl absorption and desorption process, relating to the field of polycrystalline silicon technology. The invention utilizes chlorosilanes to absorb HCl from the feed gas, followed by gas-liquid separation of hydrogen for downstream adsorption. The HCl-rich chlorosilane solution undergoes multiple heat exchange cycles for HCl desorption. The desorbed, lean chlorosilane solution is then subjected to multiple stages of cooling before being returned to the feed gas for HCl absorption, achieving a cycle between HCl absorption and desorption. The mixed gas produced by HCl desorption undergoes multi-stage condensation to separate chlorosilanes from HCl. The chlorosilanes are then returned to HCl desorption to participate in the cycle between HCl desorption and absorption. The separated HCl is sent to a cold hydrogenation process. The feed gas consists of hydrogen and HCl, and the mixed gas consists of chlorosilanes and HCl. This invention uses gas-liquid separation of hydrogen after HCl absorption to avoid the adsorption column being in a prolonged state of adsorption breakthrough. The chlorosilanes are regenerated and reused after desorption, and the purity of HCl is improved and utilized, resulting in reduced costs.

The present application relates to a kind of terminal hydroxyl vinyl fluorosilicone oil and its preparation method, the fluorosilicone oil contains two active groups of vinyl and hydroxyl in molecular structure, can simultaneously exert the reaction effect of both, its molecular weight is small, degree of polymerization is low, vinyl content and hydroxyl content are fixed, as reaction raw material or formula additive use effect constant, will not cause adverse effects to synthesis reaction or material performance by purity, component, group content variation etc.It is simple and easy to the preparation method of the present application, reaction efficiency is high, target product is clear, avoids many defects of chlorosilane hydrolysis method and cyclosiloxane ring-opening polymerization method.

A U-shaped tubular fluidized bed reactor for the synthesis of methylchlorosilane monomers includes a cylindrical body and upper and lower end caps respectively installed vertically on the cylindrical body. It also includes a gas-solid phase discharge pipe, a silicon powder feed pipe, a chloromethane inlet pipe on the upper plate, a chloromethane inlet pipe below the plate, an oil inlet pipe, and an oil outlet pipe connected to the cylindrical body. The oil inlet and outlet pipes are connected to the fluidized bed reactor via a semi-tube welded heat transfer oil cavity. Several U-shaped heat exchange tubes are installed inside the cylindrical body, with both ends connected to the oil inlet and outlet cavities. A gas distribution plate is installed at the lower part of the cylindrical body, through which the silicon powder feed pipe passes and connects to the cylindrical body. Several nozzles are installed around the cylindrical body above the gas distribution plate. This design effectively improves the fluidization effect within the fluidized bed, increases the single-pass conversion rate of chloromethane, significantly reduces the pressure difference between the inlet and outlet of the heat exchange tubes, and increases the heat transfer oil throughput.

This invention relates to a method for efficiently removing methylchlorosilane impurities from trichlorosilane using Pt@ZIF-8 adsorbent. The invention employs Pt@ZIF-8 adsorbent to simultaneously adsorb methyldichlorosilane and dimethylchlorosilane impurities, achieving a groundbreaking and efficient simultaneous removal of these two impurities. The process is simple, requires low equipment investment and energy consumption, and achieves a removal rate of up to 83% for methyldichlorosilane and up to 85% for dimethylchlorosilane. This single adsorbent can efficiently remove both methyldichlorosilane and dimethylchlorosilane simultaneously, effectively solving the problem of difficult removal of methylchlorosilane impurities from trichlorosilane. Furthermore, the adsorbent is easy to separate and can be reused through desorption under nitrogen, saving costs and demonstrating potential application value in the industrial field.

The application discloses a supported catalyst for 1-hexene self-disproportionation and a preparation method thereof. The raw materials of the supported catalyst for 1-hexene self-disproportionation include a ruthenium carbene complex, a chlorosilane, a phosphine-siloxane compound and a silica-alumina mesoporous molecular sieve. The silica-alumina mesoporous molecular sieve has a silica-aluminum molar ratio of 25-30, a specific surface area of 550-850 m 2 / g, a relative crystallinity of 90-95%, a pore size of 2.5-3.5 nm and a pore volume of 0.80-1.0 cm 3 / g. The active sites of the supported catalyst for 1-hexene self-disproportionation are fully exposed, the loading amount of the ruthenium carbene complex is high, the metal ruthenium is not easy to fall off, and the preparation process is simple, so that the 1-hexene self-disproportionation reaction can be effectively initiated.

This invention discloses a hydrophobic and oleophilic aerogel environmentally friendly composite material for oil-water separation, comprising: mixing and stirring a mixture of silicon tetrachloride and magnesite powder, followed by precipitation to obtain a SiO2 / MgSiO3 nano-hybrid material; immersing a melamine sponge in a hexane solution containing monomethyltrichlorosilane, then washing the sponge with ethanol and drying it to obtain a modified porous sponge; hydrolyzing the modified porous sponge in a mixture of glacial acetic acid and ethanol, then adding the SiO2 / MgSiO3 nano-hybrid material and a 10% sodium hydroxide ethanol solution to obtain a second-modified porous sponge; and finally air-drying the second-modified porous sponge in a mixture of trimethylchlorosilane and a monohydric alcohol to obtain the hydrophobic and oleophilic aerogel environmentally friendly composite material. The raw materials used in this invention are inexpensive and readily available, allowing for large-scale industrial production and filling a gap in the market for hydrophobic and oil-absorbing sponge production.

This invention relates to a polysulfate based on 4,4'-dihydroxydiphenyl sulfide, its preparation method, and its applications. The polysulfate is prepared using 4,4'-dihydroxydiphenyl sulfide as the core raw material. The preparation method involves dissolving 4,4'-dihydroxydiphenyl sulfide and imidazole in dichloromethane, adding tert-butyldimethylchlorosilane, reacting at room temperature for 24 hours, and then post-processing to obtain monomer 1. Alternatively, 4,4'-dihydroxydiphenyl sulfide and triethylamine are dissolved in dichloromethane, and sulfuryl fluoride gas is introduced, reacting at room temperature for 24 hours, and then post-processing to obtain monomer 2. Monomer 1 and monomer 2 are then subjected to solution polymerization or melt polymerization to obtain the polysulfate. The polysulfate of this invention exhibits high crystallinity and excellent electrical storage performance; the preparation process is simple and easy to control, and the cost is low; when used as an active material, the ITO / polysulfate / Al sandwich structure device exhibits non-volatile WORM-type storage characteristics.

The utility model relates to the polycrystal silicon production field discloses a detection device of phosphine in hydrogen for polycrystal silicon production. The device is provided with two-stage concentration device, and the detection of phosphine in hydrogen for polycrystal silicon production has higher accuracy, and the influence of impurity hydrogen chloride, chlorosilane on the detection of phosphine is eliminated. In addition, the utility model has the advantages of simple structure, simple operation, improved detection and analysis efficiency, full-automatic online operation can be realized and the like.

This invention discloses a hydrophobic nylon composite material and its preparation method. The hydrophobic nylon composite material is prepared from the following components in parts by weight: 89-98.6 parts caprolactam, 1-5 parts hydrophobically modified diatomaceous earth, 0.2-3 parts catalyst, and 0.2-3 parts co-catalyst. The hydrophobically modified diatomaceous earth is diatomaceous earth coated with 1H,1H,2H,2H-perfluorooctyltrichlorosilane, which is added to the formulation as a hydrophobic agent and directly polymerized into the nylon material through in-situ polymerization. The prepared hydrophobic nylon has a water contact angle exceeding 150°.