449 results about "Chlorosilane" patented technology

The invention belongs to the technical field of pharmaceutical chemical processes, and particularly relates to a preparation method of a penem antibiotic intermediate 4-BMA, which comprises the following steps: adding Zn powder, chlorosilane, aliphatic tertiary amine, zinc salt and 4-AA in a formula (I) into THF (tetrahydrofuran), uniformly stirring, dropwise adding a THF solution of alpha-haloamide with an induction group in a formula (II) for reaction, filtering the reaction solution, removing the zinc powder, and drying to obtain the penem antibiotic intermediate 4-BMA. Extracting the filtrate to obtain a THF phase, washing with an aqueous solution of potassium oxalate, and recovering THF to obtain a formula (III); and carrying out oxidative hydrolysis, sulfur dioxide quenching, sulfur dioxide acid regulation crystallization and recrystallization on the formula (III) to obtain the intermediate 4-BMA. According to the preparation method disclosed by the invention, a zinc salt is used as a catalyst during preparation of the formula (III), potassium oxalate is used for removing residual Zn (II) in a THF phase, SO2 is used for quenching hydrogen peroxide and acid regulation and crystallization of 4-BMA, the oxygenolysis problem of 4-BMA is solved, and the preparation method has the characteristics of greenness, safety and high efficiency, is strong in product competitive advantage and is suitable for industrial production.

The present application provides a nickel-based composite catalyst with core-shell structure, a preparation method and use thereof, the nickel-based composite catalyst with core-shell structure comprises a Ni@ZSM-5@S-1 core-shell structure and an alumina carrier, the Ni@ZSM-5@S-1 core-shell structure comprises a Ni@ZSM-5 core layer and a S-1 molecular sieve nanolayer coated outside the Ni@ZSM-5 core layer. The catalyst provided by the present application is used in the reaction of preparing chlorosilane monomer by directional catalytic cracking of organic silicon high-boiling matter, the cracking rate of high-boiling matter is more than 95%, and the selectivity of chlorosilane monomer is more than 95%.

The invention relates to the technical field of adhesives, and discloses a preparation method of an epoxy resin adhesive, which comprises the following steps: reacting p-aminophenol with diphenyl dichlorosilane under the catalysis of triethanolamine to obtain di (p-aminophenoxy) diphenyl silane; the preparation method comprises the following steps: carrying out Mannich reaction on amino in di (p-aminophenoxy) diphenyl silane, amino in polyether amine, formaldehyde and phenol to obtain the silane-containing polyether amine type benzoxazine intermediate. And finally, uniformly mixing the silane-containing polyether amine type benzoxazine intermediate and epoxy resin, and curing to obtain the epoxy resin adhesive. The prepared silane-containing polyether amine benzoxazine intermediate contains a silane structure and a benzoxazine structure, both the silane structure and the benzoxazine structure have excellent heat resistance, and the epoxy resin adhesive prepared by adding the silane-containing polyether amine benzoxazine intermediate into epoxy resin has excellent heat resistance.

The invention discloses a silane and chlorosilane mixed gas treatment process and a control system and method, and relates to the technical field of waste gas treatment in polycrystalline silicon production, and the process comprises the following steps: S1, mixed gas pretreatment; s2, deep removal of chlorosilane; s3, silane is removed, after three-stage treatment, the content of silane in tail gas is smaller than or equal to 1.0 mg / m < 3 >, the content of chlorosilane is smaller than or equal to 1.0 mg / m < 3 >, and then the tail gas is emptied, meanwhile, the control system and the control method suitable for the process are disclosed, optimization treatment of mixed process gas containing chlorosilane, silane, nitrogen and hydrogen generated in polycrystalline silicon production is achieved, use of alkali liquor is reduced, and the production cost is reduced. The emission is reduced, and the production cost is reduced.

The invention relates to a preparation method of a low-resistance silicon carbide coating based on a molybdenum / tantalum metal electrode, which comprises the following steps: S1, substrate pretreatment: carrying out mechanical micro roughening, ultrasonic cleaning and drying on a Mo / Ta electrode, and then reducing to remove an oxidation film; s2, Si-rich nucleation: taking methyl trichlorosilane as a Si / C common source, hydrogen as carrier gas / reducing gas and nitrogen as an n-type doping source for gas supply to form a compact nucleation layer; s3, main body deposition is conducted, specifically, the temperature is adjusted to 1140-1180 DEG C, the total pressure is maintained to be 80-120 Torr, and gas supply continues to be conducted for deposition; s4, annealing and dechlorination: stopping methyl trichlorosilane, keeping hydrogen and nitrogen flushing, and then annealing; and S5, cooling and shaping: cooling and taking out the sample annealed in the step S4, and adjusting the surface roughness to a set value to obtain the low-resistance silicon carbide coating on the Mo / Ta electrode. Compared with the prior art, on the premise that conductivity is not sacrificed, atomic oxygen / oxygen ion resistance, sputtering resistance, thermal cycling stability and the like of the Mo / Ta electrode can be remarkably improved.

The invention discloses a preparation method of a warm-keeping and health-care composite fabric, and relates to the technical field of functional fabrics. The preparation method comprises the following steps: firstly, combining fumed silica with graphene oxide hydrogel to prepare mixed aerogel; the mixed aerogel is combined with allyl trichlorosilane, and is grafted to a macromolecular chain of polypropylene through maleic anhydride, so that the compatibility is improved, and the agglomeration problem is solved; secondly, calcining tourmaline, then directly carrying out quenching hydration modification, combining Si-OH groups on the surface with active groups in a polyester molecular chain, and spinning into hollow fibers; the mixed aerogel can absorb far infrared rays dissipated and emitted by the modified tourmaline, and the aerogel absorbing the far infrared rays can generate a resonance effect and a warm effect and permeate into the deep layer of the skin; the modified tourmaline has the capability of generating negative ions, and the gull rock powder is added for combined action, so that the antibacterial effect is achieved by destroying the structure of bacteria, and the health-care effect is achieved. The composite fabric prepared by the invention has warm-keeping and health-care effects.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

The invention discloses a multistage separation method of oil in dimethyl dichlorosilane hydrolysis byproduct acid, which is used for removing organic oil impurities in dimethyl dichlorosilane hydrolysis byproduct hydrochloric acid, and comprises the following steps: S1, static pre-separation: introducing the dimethyl dichlorosilane hydrolysis byproduct hydrochloric acid to be treated into a static settling tank; most easily separated oil drops in the byproduct hydrochloric acid are removed; s2, introducing the byproduct hydrochloric acid treated in the step S1 into a high-shear device, adding a polymer demulsifier, and stirring to promote oil drop coalescence; s3, deeply filtering the demulsified acid liquor by adopting a strong acid-resistant, temperature-resistant and anti-pollution ceramic membrane, and intercepting fine oil drops; and S4, introducing the byproduct hydrochloric acid filtered in the S3 into an activated carbon adsorption column, and adsorbing residual trace soluble organic matters and pigments. Compared with the prior art, the multi-stage separation method for the oil in the dimethyl dichlorosilane hydrolysis byproduct acid has the advantages of being convenient to operate and use, efficient, low in cost and environmentally friendly.

The invention provides a photovoltaic glass surface self-cleaning coating and a preparation method thereof.The photovoltaic glass surface self-cleaning coating is prepared from a dehydrated organic solvent, 1-7 parts by mass of tetramethyl orthosilicate, 2-15 parts by mass of fluorosilane hydrophobic coupling agent, 10-20 parts by mass of silicon tetrachloride, 1-10 parts by mass of hydrophobic silane coupling agent, 5-15 parts by mass of dichloro (methyl) (3, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- and 1-10 parts of 2, 3, 3-trifluoropropyl) silane and 1-10 parts of dimethyl dichlorosilane. According to the preparation method, tetramethyl silicate with relatively low reaction activity is used as a raw material to react with silicon tetrachloride to form an intermediate species with moderate activity, and then a linear chain polymer modification layer is pre-formed on the surface by utilizing the difference of reaction rates; a fluorosilane substance added in the coating also can participate in the reaction to form an organic silicon linear polymer with a fluorosilane side chain; in the recombination process of polysiloxane, perfluoro side chains with lower surface energy migrate to the surface of the coating; meanwhile, by adding the dichlorosilane coupling agent and the trichlorosilane coupling agent, the flexibility and hydrophobicity of the coating are improved.

The application relates to the technical field of finishing agents, and discloses a water-based fluorine-free low-temperature water-repellent finishing agent and a preparation method and application thereof. 2,2-dimethylol propionic acid alkyl ester and methyl phenyl dichlorosilane are reacted to obtain an alkyl ester siloxane copolymer, which is then stirred and dispersed with water and an emulsifier to obtain the water-based fluorine-free low-temperature water-repellent finishing agent. The main chain of the water-based fluorine-free low-temperature water-repellent finishing agent is a hydrophobic phenyl polysiloxane molecular chain, and the side chain contains hydrophobic ester groups and long carbon chains. After finishing of terylene fabric, water molecules can be prevented from contacting the terylene surface, and the hydrophobic and water-repellent performance of the terylene fabric is significantly improved. Moreover, a high water contact angle can be maintained after multiple washes.

Hydrosilylative crosslinking compositions containing an aliphatically unsaturated compound which is the reaction product of an alkali metal siliconate and a chlorosilane and a coupler having two silicon bond hydrogen atoms have high compression and damping characteristics when cured.

The invention discloses a method for preparing methyltriacetoxysilane from acetic anhydride-containing acetyl chloride distillation tailings, and relates to the technical field of organic silicon synthesis, the method comprises the following steps: adding methyl trichlorosilane and acetic anhydride-containing acetyl chloride distillation tailings into a reaction kettle, stirring and heating; after a total reflux condition is reached, maintaining total reflux for a period of time, and then starting to collect acetyl chloride; continuously heating until the collection of acetyl chloride is completed, stopping heating, and when the temperature of the kettle is reduced to room temperature, heating again and starting vacuum negative pressure; when the kettle temperature reaches a set value, stopping heating, stopping stirring, and closing vacuum negative pressure; and after the kettle temperature is reduced to room temperature, adding pretreated activated carbon, carrying out decoloration reaction, and carrying out suction filtration after the reaction is completed, thereby obtaining the product. According to the method, a large amount of acetic anhydride in the acetyl chloride distillation tailings is used as a raw material and directly reacts with methyl trichlorosilane to prepare methyltriacetoxysilane, and the quality of the obtained product is remarkably higher than that of a product prepared by a normal process.

The application relates to a method for synthesizing and refining electronic-grade hexachloroethyldisilane, and specifically, trichlorosilane raw material is mixed with protective gas into a raw material buffer tank, a mixed gas obtained through the mixing is subjected to a catalytic synthesis reaction under the irradiation of an ultraviolet light source, a product obtained through the reaction is subjected to condensation separation, gaseous trichloromethane returns to the raw material buffer tank to continuously participate in the synthesis reaction, the mixed liquid in the cold trap is warmed and vaporized, hexachloroethyldisilane is obtained through two-step refining, and the purity of the product hexachloroethyldisilane can reach the electronic grade. The application takes trichlorosilane as the initial raw material, the price of the raw material is low; the photo-catalysis is used as the synthesis process, the synthesis process is simple, the reaction yield is high, energy is saved, and the environment is protected; the two-step method is used for refining and purifying the product, the depth of the refining and the efficiency of the refining are high, large-scale production is suitable, the monopoly of foreign enterprises is broken, and the application has important significance.

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.

The invention relates to a method and a system for improving SiC bulk doping yield based on retention boundary layer design, and relates to the technical field of semiconductor material preparation, chemical vapor deposition treatment is carried out on gas-phase raw materials on the surface of a substrate, and the gas-phase raw materials are gaseous methyl trichlorosilane, hydrogen, nitrogen and helium; the method comprises the following steps: collecting the flow rate and chemical vapor deposition processing parameters of a gas-phase raw material in real time, controlling the volume flow ratio of hydrogen to gaseous methyl trichlorosilane to be 3-15, and calculating the thickness of a retention boundary layer of the gas-phase raw material according to the flow rate and chemical vapor deposition processing parameters of the gas-phase raw material, the thickness of the retention boundary layer of the gas-phase raw material is compared with the preset thickness of the retention boundary layer, the flow velocity of the gas-phase raw material and / or chemical vapor deposition processing parameters are / is adjusted according to the comparison result, and the SiC block material prepared through the method is compact and free of pores or free carbon or silicon carbide nanowires, and the adjustable range of the resistivity is wide.

The invention belongs to the technical field of organic synthesis, and discloses a method for synthesizing propargyl silane derivatives through nickel catalytic reduction coupling. The method comprises the following steps: in a protective atmosphere, taking an organic solvent as a reaction medium, and reacting a halogen-containing butyne compound with chlorosilane under the action of a catalyst, a ligand and a reducing agent to obtain the propargyl silane derivative. The structural formula of the propargyl silane derivative is I, the catalyst is a nickel catalyst, and the ligand is a nitrogen or phosphine ligand. The method disclosed by the invention is simple, low in cost, efficient in reaction, few in byproducts, easy to separate and purify and high in yield.

The invention provides a modified polyolefin catalyst and a preparation method and application thereof, the modified polyolefin catalyst comprises a polyolefin catalyst and an organochlorosilane polymer, and the polyolefin catalyst comprises a main catalyst and a co-catalyst; the polymer of organochlorosilane is selected from a homopolymer of organochlorosilane containing terminal alkenyl, or a copolymer of organochlorosilane containing terminal alkenyl and alpha-olefin. After the modified polyolefin catalyst provided by the invention is dispersed into the generated polyolefin, the polymer of the organochlorosilane has a nucleation effect, and the crystallization temperature of the polyolefin can be increased under the condition of extremely small dosage. And meanwhile, the viscosity of polyolefin melt is not too high, and silicon-containing wastewater is not generated.

The invention relates to the technical field of chemical gas chromatography analysis and detection, in particular to a device and method for chlorosilane detection, and the method comprises the following steps: inserting a needle head of an injector into a chlorosilane sample bottle, pulling back a push rod at a pulling-back speed of v, and extracting a sample of V1; the needle head of the injector faces upwards, bubbles float upwards to the top and are pushed and injected until the bubbles are discharged, and the needle cylinder is filled with the sample; according to the method, the needle head is inserted into a sample inlet of a heated gas chromatograph for detection, and the problem of inaccurate sample injection volume caused by bubbles generated by rapid volatilization of chlorosilane is effectively avoided through the steps of slow liquid extraction and bubble discharge, so that the accuracy of gas chromatography detection data and the repeatability of an experiment are remarkably improved; after the injection is finished, the specific high temperature of the sample inlet is combined, so that the chlorosilane sample is ensured to be instantly and completely gasified, the needle head is prevented from being remained or the sample is prevented from being volatilized in advance in the needle, the detection integrity is ensured, and the cross contamination of the sample inlet and a chromatographic column is avoided.

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.

The utility model provides a device for improving the conversion rate of cold hydrogenated silicon powder. The device comprises an external dust remover (2) in fluid connection with a top discharge hole (13) of a fluidized bed (1) in a cold hydrogenation production process; a bottom outlet of the external dust remover (2) is in fluid connection with a top inlet of the reactor (3); a top outlet of the reactor (3) is in fluid connection with a top inlet of the chlorosilane storage tank (5) after sequentially passing through a first heat exchange channel of the heat exchanger (4) and a condensation channel of the condenser (6); a top outlet of the chlorosilane storage tank (5) is connected with a second heat exchange channel outlet of the heat exchanger (4) in parallel and then is in fluid connection with a bottom inlet of the reactor (3).

The invention provides a ceramic precursor and a preparation method thereof, and relates to the technical field of ceramic materials.The preparation method comprises the steps that 1, a system containing metal lithium and a first organic solvent is placed in an ice salt bath, then dimethyl phenyl chlorosilane and methyl phenyl dichlorosilane are dropwise added into the system in sequence for a reaction, and a reaction product is obtained; adding triphenyl pentamethyl trisilane to obtain triphenyl pentamethyl trisilane; (2) triphenylpentamethyltrisilane and a chlorinating agent are added into a second organic solvent for a substitution reaction, and trichloropentamethyltrisilane is obtained; (3) adding trichloropentamethylpropyl silane into a second organic solvent, uniformly mixing, and then adding metal sodium to carry out coupling reaction, so as to obtain hyperbranched polysilane; and cracking the hyperbranched polysilane to obtain a ceramic precursor. The ceramic precursor provided by the scheme has a hyperbranched structure, is narrow in molecular weight distribution and excellent in solubility, does not need complex or expensive equipment, and is higher in yield.

The invention provides polyester resin for a transparent powder coating with excellent adhesive force and leveling as well as a preparation method and application of the polyester resin, and belongs to the technical field of powder coatings. The polyester resin is mainly prepared by taking diethylenetriamine pentaacetic acid, triethyl chlorosilane, 1, 6-hexanediol, N, N-diisopropylethanolamine, 2, 2-dimethyl propanol, neopentyl glycol, 3, 3-tetramethylene glutaric anhydride, 1, 4-cyclohexanedimethanol and the like as raw materials through polymerization. The obtained polyester resin chain segment has many branched structures, the number of amino groups and ester groups in the branched structures is large, the softening point is low, the low-temperature melting fluidity is good, the transparency is high, the adhesive force with a base material is good, then high-functionality diethylenetriamine pentaacetic acid is adopted for carboxyl end capping, the terminal carboxyl functionality is high, the curing activity is high, and the curing effect is good. After being cured with E-12 epoxy resin at low temperature, a coating film is good in leveling property and high in transparency, and can be used in the fields of thermosensitive base materials which are not easy to adhere, such as thin glass materials and the like.

The invention belongs to the technical field of cold hydrogenation synthesis, and particularly relates to a treatment method of slag slurry generated in a cold hydrogenation synthesis process, the slag slurry generated in the cold hydrogenation process is sequentially subjected to primary filtration, secondary diatomite precoating filtration, drying evaporation and rectification purification treatment, so that the recovery rate of chlorosilane (mainly silicon tetrachloride) is up to 99%, and the recovery rate of chlorosilane is up to 99%. Resource waste and environmental pollution are avoided, meanwhile, an alkali washing tank is omitted, the process is simplified, and energy consumption is reduced; in addition, physical separation (filtration, drying and rectification) and solid slag neutralization are adopted in the treatment method, no wastewater is generated, a matched sewage treatment system is not needed, and the environmental protection cost and energy consumption are remarkably reduced.

The application provides a reactive silicone oil and a preparation method and application thereof. The preparation method of the reactive silicone oil comprises the following steps: S1, under the protection of nitrogen, trimethyl monochlorosilane is added into a mixed solution of hydroxyl silicone oil, an acid-binding agent and an organic solvent, and reaction is carried out at 40-50 DEG C for 2-3 h, and then the reaction is cooled to room temperature; S2, methyl dichlorohydrogen silane is added into the system of step S1, and reaction is carried out at 30-50 DEG C for 2-3 h, and then the system is cooled and filtered, and the filtrate is obtained by removing low boiling; S3, under the protection of nitrogen, both end vinyl silicone oil, platinum catalyst, the product of step S2 and an additive are mixed, and reaction is carried out at 65-80 DEG C for 2-3 h, and then low boiling is removed, and the product is obtained. The reactive silicone oil obtained by the preparation method of the application is used to replace dimethyl silicone oil in the rubber compound, which can reduce the viscosity of the pouring sealant, and greatly reduces the leakage problem caused by adding dimethyl silicone oil in the prior art.

The invention belongs to the technical field of semiconductor material preparation, and particularly relates to a closed-loop system and method for batch synthesis of silicon carbide powder. The system comprises a raw material synthesis and purification module, a chemical vapor deposition reaction module and a tail gas treatment and circulation module which are connected in sequence. According to the method, raw material gas is synthesized and purified through the modules, a chemical vapor deposition reaction is carried out to generate a silicon carbide deposition body, the deposition body is crushed to obtain SiC powder, tail gas is subjected to dust removal, condensation and adsorption separation through the tail gas treatment and circulation module, and hydrogen, hydrogen chloride and chlorosilane are recovered respectively and returned to a system for cyclic utilization. The core of the method is that the components of the raw material gas and the tail gas are monitored and regulated in real time through the online gas component detector, and the stability of the carbon-silicon molar ratio in the system is dynamically maintained, so that the problem of element imbalance in long-term operation is solved, efficient circulation of key elements is realized, the cost is remarkably reduced, and the method is suitable for large-scale continuous production of SiC powder.

The application discloses a kind of continuous co-production diphenyl dichlorosilane and triphenyl chlorosilane method and system, belong to organic silicon monomer synthesis technical field.The method will silicon powder and chlorobenzene direct method synthesis high-temperature gas phase product, after cyclone separation precision filtration dust removal, in turn through cascade condensation, obtain rich one phenyl trichlorosilane stream;It is directly introduced into disproportionation reaction kettle, and aluminium trichloride catalyst is added to carry out disproportionation and redistribution reaction;After reaction, add tertiary butyl alcohol, make aluminium trichloride into solid tertiary butyl alcohol aluminum, and remove by solid-liquid separation;Filtrate is separated by reduced pressure distillation, ultra vacuum distillation, and high-purity diphenyl dichlorosilane and triphenyl chlorosilane are obtained.The process coupling is closely, and heat energy is reasonably utilized, and catalyst treatment is green and environmental protection, and no strong corrosive gas and chlorine-containing wastewater is generated, the yield and selectivity of high value-added phenyl chlorosilane monomer are significantly improved, and the process is continuous and stable, with high degree of automation, suitable for large-scale industrial production.

The invention provides a system and method for recycling methane chloride from methyl chlorosilane synthesis tail gas. According to the method, 85%-90% of methane chloride in the methyl chlorosilane synthesis tail gas is recycled in a three-stage sectional type condensation mode. 90-95% of residual methane chloride is recovered through directional absorption of dichloromethane; and finally, residual methane chloride is recovered in a decompression analysis and reflux impurity removal mode, the total recovery rate of methane chloride is larger than or equal to 99%, the purity of methane chloride is larger than or equal to 99.5%, waste of methane chloride is greatly reduced, high recovery of methane chloride is achieved, and methane chloride can be directly reused in a methyl chlorosilane synthesis reaction.

The invention discloses a reduction process feeding method and system, and the method comprises the steps: installing an integrated temperature transmitter on a chlorosilane feeding pipeline of a reduction furnace, and connecting a recovery pipeline to the chlorosilane feeding pipeline at the downstream of the integrated temperature transmitter, an integrated temperature transmitter is used for monitoring the temperature in a chlorosilane feeding pipeline in real time and controlling connection and disconnection of the chlorosilane feeding pipeline and a recovery pipeline according to the monitored temperature, so that gas-phase chlorosilane is introduced into a mixer through the chlorosilane feeding pipeline to be mixed with hydrogen and then introduced into a reduction furnace; and the liquid-phase chlorosilane is discharged through a recovery pipeline to be recovered and reused. Liquid-phase chlorosilane in the feeding process of the reduction process can be discharged and recycled, and the liquid-phase chlorosilane is prevented from entering the reduction furnace, so that the problem that the reduction furnace is shut down due to the fact that the liquid-phase chlorosilane is accumulated in a material skid chlorosilane feeding pipeline of the reduction furnace is solved, and the stability of a feeding system of the reduction process is maintained.