842 results about "Intermediate product" patented technology

The invention relates to a metallized microbubble and a preparation method thereof, a construction method of a multifunctional composite probe, and a rapid bacterium capturing and sterilizing method, and belongs to the technical field of functional material preparation. The method aims at solving the technical problems that in the prior art, a metal coating on the surface of the hollow glass microbubble is not uniform, combination is not firm, and stability is poor. According to the technical scheme, the method is characterized by comprising the following steps: mixing surface-activated hollow glass microbubbles with a polyethyleneimine solution for reaction, and washing and drying to obtain polyethyleneimine-coated hollow glass microbubbles; then reacting with a single-stranded DNA buffer solution to obtain an intermediate product loaded with DNA; then introducing a silver nitrate solution to load silver ions on the surface of the compound; and finally, reducing through a sodium borohydride solution to prepare the metallized microbubbles. The metalized microbubbles prepared by the method can be used for constructing a multifunctional composite probe to realize efficient capture and synergistic antibiosis of targets such as bacteria.

The invention discloses an injection mold for multicolor injection molding and a production process thereof, a set of machine vision on-line inspection system with pattern detection and surface flatness detection is integrated, pattern detection is performed on a specific part of a formed part A through optical screen detection, horizontal and vertical coordinates of an actual contour are compared with a preset range, and the pattern of the specific part A is detected. Then, the surface flatness of the part is objectively evaluated by analyzing reflected light distribution on the surface of the part, whether a qualified matrix is provided for second injection or not is judged, and key quality attribute judgment on the intermediate product A before second injection is achieved; according to the method, the waste of raw materials, energy and working hours caused by the fact that known waste products continue to be subjected to second injection is effectively prevented, meanwhile, the position precision and visual definition of final multi-color products at the joints of different colors are guaranteed, the defects of boundary line distortion, blooming and the like are overcome, and the production yield and the resource utilization rate are remarkably increased.

The invention discloses a water pollutant adsorbent. The water pollutant adsorbent is characterized by comprising a chelate prepared by reacting manganese dioxide with an EDTA-2Na (Ethylene Diamine Tetraacetic Acid-2Na) solution. The invention also discloses a preparation method and a production system of the water pollutant adsorbent. The preparation method of the water pollutant adsorbent comprises the following steps: 1, crushing and grinding electrolytic manganese anode mud; 2, removing impurities in the electrolytic manganese anode slime to obtain filter residues; 3, cleaning the filter residues, and carrying out solid-liquid separation to obtain an intermediate product; and 4, chelating modification. The water pollutant adsorbent production system comprises a reaction kettle. According to the technical scheme, the manganese dioxide raw material can be effectively utilized to prepare the pollutant adsorption and treatment material, and high-valued treatment of the electrolytic manganese anode mud solid waste is effectively achieved.

The invention belongs to the technical field of livestock and poultry breeding waste treatment, and discloses a pig farm waste comprehensive treatment and cyclic utilization system which comprises the steps of obtaining various wastes of a pig farm, collecting multi-dimensional data, matching an optimal working condition mode in combination with three-dimensional situation evaluation, and generating a global collaborative instruction set; performing cross-unit predictive collaboration through a causal-parameter chain, performing waste grading treatment and resource preliminary conversion to obtain a treatment intermediate product and a resource primary product, and generating operation feedback data; performing efficiency-income two-dimensional evaluation, when the efficiency does not reach the standard, calling a historical recovery file to generate an adaptive recovery strategy, and generating an update state report; scheduling operation is executed through resource-load dynamic matching logic, reverse traceability optimization processing parameters are carried out, resource products are obtained, and a circulation benefit report is generated; and fusing the multi-cycle cyclic benefit report and the operation feedback data, generating a three-dimensional optimization suggestion, updating the core rule base, and forming a closed-loop link.

The invention relates to the technical field of vegetable oil refining, in particular to a production method of extra-high oryzanol rice oil. The method comprises the following steps: adding wood active carbon into deacidified oil, carrying out oryzanol adsorption operation, filtering to obtain high-oryzanol active carbon, adding food-grade ethanol into the high-oryzanol active carbon, stirring, and removing an active carbon solid phase to obtain an ethanol desorption solution containing oryzanol; mixing the ethanol desorption solution with the deacidified oil, and evaporating ethanol to obtain an ultra-high oryzanol rice oil intermediate product; and carrying out secondary decoloration, physical deodorization and winterization degreasing on the ultra-high oryzanol rice oil intermediate product to obtain the finished ultra-high oryzanol rice oil. The ultra-high oryzanol rice oil with the oryzanol content larger than or equal to 4% (40000 ppm) and the light-color rice oil with the color meeting the first grade of the national standard GB 19112 of rice bran oil can be stably produced at the same time, and the method is simple, safe and low in cost.

The application discloses a method for recombining sub-products based on ingredient composition, which comprises the following steps: separating a homogeneous mixture into a plurality of homogeneous intermediate products with different ingredients by a physical separation method; and selecting at least two homogeneous intermediate products to be uniformly mixed according to a set ratio by using a digital blending technology, so as to obtain a required sub-product. By using the method, a single product can be converted into a plurality of sub-products with different characteristics from the initial product without interfering with the existing production process of the product. The process is simple, the process is controllable, and the method is suitable for large-scale production and has a wide application prospect.

The application belongs to the technical field of medical materials, and discloses a soft tissue repair patch and a preparation method thereof, which comprises the following steps: S1, treating and cleaning animal soft tissue to obtain a first intermediate product; S2, adding the first intermediate product into a reagent to perform freeze-thaw circulation to obtain a second intermediate product; S3, soaking and treating the second intermediate product with an organic solvent and cleaning to obtain a third intermediate product; S4, soaking and treating the third intermediate product with an alkali solution and cleaning to obtain a fourth intermediate product; and S5, soaking and treating the fourth intermediate product with an acid solution, cleaning, drying and sterilizing to obtain the soft tissue repair patch. The application provides a more gentle and friendly decellularization scheme, and the decellularized matrix prepared by using the scheme is more completely decellularized, has no chemical residue, and maintains the natural scaffold structure of collagen.

The invention provides an efficient treatment method for VOC waste gas in semi-coke production, which comprises the following steps: when the type of a catalyst and reaction conditions are determined, performing low-temperature oxidation treatment on a high-concentration VOC intermediate product through a fixed bed reactor, and adjusting the reaction temperature in real time by adopting a temperature monitoring system to obtain a waste gas flow after preliminary decomposition; for the waste gas flow after optimization decomposition, calculating energy consumption and equipment operation parameters in the reaction process by adopting an energy consumption analysis algorithm, and adjusting a process integration scheme through an iterative optimization technology to obtain a process parameter combination under energy consumption control; and according to a process parameter combination under energy consumption control, analyzing a balance point of equipment investment and operation cost through a cost estimation model, and predicting economy of long-term operation by adopting a Monte Carlo simulation technology to obtain a final process optimization scheme.

The invention discloses a phosphorus-nitrogen synergistic flame-retardant benzoxazine / epoxy resin composite material and a preparation method thereof. Firstly, a phenolic compound and DOPO react to generate an intermediate product, and then the intermediate product, an amine compound and paraformaldehyde are subjected to a dehydration condensation reaction to generate the phosphorus-nitrogen synergistic flame retardant benzoxazine. The phosphorus-nitrogen synergistic flame-retardant benzoxazine is added into epoxy resin for thermocuring to obtain the composite material. The prepared benzoxazine flame retardant contains phosphorus and nitrogen elements, the nitrogen-based flame retardant has the advantages of low pollution, low smoke, good compatibility with EP and the like, and a quenching effect, a dilution effect and a carbon layer barrier effect can be generated in the combustion process to prevent further combustion of flames. The composite material has better flame retardant property, can effectively reduce the risk of fire hazard caused by overheating or short circuit of equipment, and ensures the safe and stable operation of energy equipment.

The invention relates to a synthesis method of milobalin or acid salt thereof, and belongs to the technical field of medicine synthesis. In order to solve the problem that chiral resolution needs to be adopted in the prior art, the invention provides a synthesis method of miloabalin or an acid salt thereof, which comprises the following steps: under the action of an organic strong base, carrying out Michael addition reaction on a compound shown as a formula III and acetonitrile in a non-polar organic solvent at a low temperature of-50 DEG C or below to obtain an intermediate product; under the alkaline condition, the intermediate product is subjected to an oxidation reaction and a hydrolysis reaction under the action of an oxidizing agent, after the reaction is finished, an intermediate product is obtained through acidification, and the intermediate product is subjected to a high-temperature decarboxylation reaction in an aprotic solvent to obtain a compound of a formula VI; and carrying out Hofmann degradation reaction on the compound of formula VI to obtain the compound of formula I miloabalin or miloabalin acid salt. The method has the advantages of high stereoselectivity, no need of chiral resolution operation, avoidance of the problem of large material loss caused by resolution, high chiral purity and high yield.

The invention relates to a fabric flavor enhancer containing ester-based quaternary ammonium salt and a preparation method thereof. The fabric flavor enhancer containing ester-based quaternary ammonium salt comprises the following components: polyethylene glycol, an ester-based quaternary ammonium salt solution, modified silicon dioxide, polyquaternary ammonium salt and the like. The modified silicon dioxide is prepared by the following steps: carrying out a blending reaction on hydroxylated silicon dioxide and KH570 to obtain an intermediate product, then carrying out a blending reaction on triethanolamine, acrylic acid, lauric acid and sodium bromoacetate to obtain an intermediate product 2, and finally polymerizing the intermediate product, the intermediate product 2 and hydroxyethyl methylacrylate. Long alkyl chains, quaternary ammonium cations and hydroxyl are introduced into the modified silicon dioxide, so that organic matters on the surface of the modified silicon dioxide form a net-shaped structure; wherein the long alkyl chain can improve the compatibility; quaternary ammonium cations can neutralize charges and make the fabric softer and more fluffy; hydroxyl can adsorb essence, the antistatic performance and the like can be improved, and in addition, silicon dioxide and a net-shaped structure can further enhance the fragrance of the fabric.

The invention relates to the technical field of high polymer materials, and discloses a flame-retardant PP composite material and a preparation method, the flame-retardant PP composite material comprises the following raw materials by weight: 100 parts of PP, 10 parts of ABS, 1-3 parts of polypropylene grafted maleic anhydride, 2-5 parts of an intermediate product B, and 1-5 parts of modified graphene oxide, according to the prepared intermediate product B, raw materials are simple and easy to obtain, the preparation method is simple, a hydroxyl structure contained in the intermediate product B and the PP composite material are utilized to generate hydrogen bonds and chemical bonds, the precipitation-resistant effect of the intermediate product B in the PP composite material is enhanced, graphene oxide is subjected to organic modification, and the precipitation-resistant performance of the PP composite material is improved. The compatibility of the graphene oxide in the composite material is enhanced, and the mechanical property and the flame retardant property of the composite material are improved.

The invention provides fluorenyl magnolol light-cured solder resist ink and a preparation method thereof, the solder resist ink comprises the following raw material components by mass: 20%-60% of fluorenyl magnolol light-cured resin, 10%-25% of a reactive diluent, 10%-30% of a nano filler, 1%-5% of a photoinitiator, 0.1%-5% of an auxiliary agent, and the balance of a solvent, the fluorenyl magnolol light-cured resin is prepared by reacting 9-fluorenylidene acetic acid with thionyl chloride to generate an intermediate product fluorenyl anhydride, and then reacting the intermediate product fluorenyl anhydride with magnolol. Wherein the molar ratio of magnolol to thionyl chloride to 9-fluorenylidene acetic acid is 1: (2-4): (2-4). The preparation process is simple, toxic by-products are avoided, the prepared solder resist ink has excellent flame retardance, heat resistance and adhesive force, low dielectric constant and high hardness, the problems of high dielectric loss, insufficient flame retardance and BPA toxicity of traditional ink are solved, and the solder resist ink is completely suitable for production and manufacturing of PCB substrates for high-frequency communication.

The invention discloses a preparation method of 6-nitro-m-cresol, and belongs to the technical field of organic synthesis.The method comprises the steps that raw materials are subjected to esterification, water washing, sulfonation, nitration, desulfonation and refining in sequence, and the 6-nitro-m-cresol is obtained. According to the method, it can be guaranteed that the intermediate product is the 6-nitro derivative, generation of isomer impurities such as 2-site and 4-site is greatly reduced from the source, the reaction path is clear, and atom economy is good. The method does not need to depend on complicated means such as time-consuming column chromatography or precise fractionation, the requirement for high purity can be met only through conventional extraction and crystallization operation, the technological process is simple, the method is very suitable for large-scale production, and the product purity (measured through HPLC (High Performance Liquid Chromatography)) can stably reach 98% or above.

The invention relates to the field of catalysts, and discloses a nickel sulfide heterojunction rich in lattice distortion and sulfur vacancies and a preparation method and application thereof.The preparation method comprises the steps that a nickel net is inserted into a mixed solution containing Cr salt and terephthalic acid, a hydrothermal reaction is conducted, and a precursor is obtained; and calcining the precursor and sulfur powder in an inert atmosphere to obtain the Cr-doped water electrolysis hydrogen production catalyst. The prepared catalyst has a heterostructure, a large number of S vacancies exist on a heterojunction interface at the same time, lattice distortion occurs, such microstructure defects (including microstrain and atomic vacancies) are beneficial to adsorption and desorption of intermediate products in the electrochemical reaction process, and high-valence Cr (+ 3 and + 6) existing in the catalyst has a good electrochemical reaction effect. The catalytic activity and the stability can be favorably improved.

The invention relates to a preparation method of a hydrolysis modified organic silicon high-temperature-resistant anticorrosive coating, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: heating 1, 1 '-bis (dimethylsilyl) ferrocene, methylbenzene, chloroplatinic acid, 2, 2, 3, 3, 4, 4, 4-heptafluorobutyl acrylate and bis-(2-methylallyl) cyclooctyl-1, 5-diene ruthenium, and reacting to obtain an intermediate product 1; weighing methyltrimethoxysilane, phenyltrimethoxysilane and the intermediate product 1, uniformly stirring and mixing, slowly dropwise adding diluted hydrochloric acid, hydrolyzing, and heating to react, so as to obtain modified silicon resin; adding the modified silicon resin into petroleum ether, and adding silicone oil, an organic tin catalyst, a bis-ammonia coupling agent, filler and a curing agent to obtain the anticorrosive paint.

The invention discloses an anti-over-grinding crushing and grinding process for easy-to-argillization ore, which mainly comprises the following steps of: crushing raw ore and transferring the crushed raw ore into a surge bin; ore in the surge bin is transferred to a first double-layer vibrating screen for wet type pre-screening, oversize and intermediate products enter the semi-autogenous mill, and undersize products are pumped to the ore discharge end of the semi-autogenous mill. Ore discharged by the semi-autogenous mill and undersize products enter a second double-layer vibrating screen to be classified, oversize products are subjected to hard rock crushing and then return to an ore feeding belt of the semi-autogenous mill, intermediate products enter a lattice type ball mill, and ore grinding products and undersize products of the second double-layer vibrating screen are combined and pumped into a cyclone to be classified. And underflow of the cyclone is classified by a high-frequency sieve, oversize return to a ball mill for regrinding, and overflow and undersize products of the high-frequency sieve are combined into finished ore pulp to be fed into a sorting process. The process flow is simple, one-stage crushing and ore washing and screening before grinding are adopted, and forced discharging equipment such as a semi-autogenous mill is matched, so that over-grinding can be effectively prevented, and the ore grinding energy consumption is reduced.

The invention discloses a flat functional current collector and a preparation method thereof, and relates to the technical field of current collectors. The method specifically comprises the following steps that S1, an organic film and a metal foil are attached to the same release film, and interfaces in the thickness direction are in contact; an intermediate product A is obtained; s2, a metal layer is deposited on the face, away from the release film, of the intermediate product A, and an intermediate product B is obtained; and S3, removing the release film in the intermediate product B, and depositing a metal layer on the surface again to obtain the functional current collector. A continuous conducting layer can exist in the edge area of the functional current collector prepared by the method, and a tab is not required to be reserved or welded like a traditional current collector, so that the structural smoothness of the current collector is kept.

The application discloses a sweet wormwood extract, a preparation method and application thereof and a sweet wormwood extract veterinary drug, and the method comprises the following steps: S1, heating and extracting sweet wormwood byproducts with an extraction solvent, filtering, discarding the filtrate, and obtaining an intermediate product filter cake; S2, concentrating the intermediate product filter cake to a constant weight; S3, heating and extracting the constant weight obtained in the step S2 with deionized water, filtering, and taking the filtrate; S4, concentrating the filtrate obtained in the step S3 to a constant weight, and obtaining the sweet wormwood extract. The application provides a sweet wormwood extract and a preparation method thereof, and provides a veterinary drug based on the sweet wormwood extract; the veterinary drug obtained by the application can clear heat, resolve summer-heat, and relieve deficiency heat, and can be used for treating various livestock and poultry diseases; the preparation method is simple, easy to operate, raw materials are easy to obtain, production cost is low, and the application has a good market application prospect.

The invention relates to the technical field of catalyst preparation, and discloses a carbon modified copper-based catalyst and a preparation method and application thereof. The method comprises the following steps: (1) sequentially carrying out coprecipitation and aging on an alkaline precipitant solution, a metal salt solution and an anion modifier solution to obtain an intermediate product I; and (2) under the condition that the oxygen concentration is not higher than 5% by volume, roasting the intermediate product I to obtain the carbon modified copper-based catalyst, the anion modifier solution contains sodium dodecyl diphenyl ether disulfonate and sodium gluconate in a molar ratio of 1: (1-10); the pH value of the anion modifier solution is 9-11; the metal salt solution contains zinc salt, copper salt and aluminum salt. The prepared carbon modified copper-based catalyst has the advantages of high conversion per pass of carbon dioxide, low activation temperature, high methanol selectivity, long-period operation and stable structure.

To provide a manufacturing method for a press-formed product that is able to properly perform press forming while reducing a bending radius, and to provide the others.SOLUTION: A manufacturing method for a press-formed product P includes: an intermediate product preparing step (step S10) of preparing an intermediate product P1; a placing step (step S20) of placing the intermediate product P1 on a second lower die 21 in which a second shoulder portion 21c is formed with a curvature radius RC2 smaller than a bending radius RB1 of a first bent portion 80; a sandwiching step (step S30) of lowering an upper die 22 including an upper-die shoulder portion 22c with respect to the second lower die 21, sandwiching a side plate 82 of the intermediate product P1 between a side surface 21b and an upper-die recessed-portion side surface 22b, and restraining a bottom plate 81 in a direction along the bottom plate 81; and a press-forming step (step S40) of lowering the upper die 22 to press-form the intermediate product P1.SELECTED DRAWING: Figure 3

This characteristic distribution system comprises: an existing amount acquisition unit that acquires the existing amount that can be distributed to an intermediate product manufactured from a raw material including a characteristic material having at least a specific characteristic and that includes an amount less than or equal to the upper limit value according to the total use amount of the characteristic material for use in manufacturing the intermediate product during a prescribed period; a target acquisition unit that acquires a distribution target intermediate product or the intermediate product and the amount; and a distribution unit that executes distribution processing for distributing at least a part of the existing amount to the acquired distribution target intermediate product.

The invention relates to the technical field of chemical engineering, and discloses a method for improving the chromaticity and purity of acetic anhydride based on a reflux ratio, and the method comprises the following steps: optimizing an evaporation tower, an acetic acid rectifying tower and an acetic anhydride rectifying tower, and installing an online detection instrument and an automatic control valve to construct an intelligent rectification control system; evaporating the crude acetic anhydride by using the optimized evaporation tower to obtain crude acetic anhydride steam; feeding the crude acetic anhydride steam into an acetic acid rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting a reflux system to preliminarily remove acetic acid; monitoring the acetic acid content through an online gas chromatograph, and finely adjusting the reflux ratio until the reflux ratio reaches the standard when the measured acetic acid content is higher than a target value; feeding the crude acetic anhydride reaching the standard into an acetic anhydride rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting to obtain an intermediate product; monitoring chromaticity and purity through an on-line platinum-cobalt colorimeter and an on-line gas chromatograph, and updating the reflux ratio to be qualified according to a bivariate adjustment formula; and finally, carrying out all-item detection on a finished product, and locking reflux ratio parameters after confirming that the finished product is qualified.

The invention discloses a preparation method of a Fe-based MOF catalyst, and belongs to the technical field of chemical materials, the oxygen evolution reaction performance effect of the Fe-based MOF catalyst prepared by the preparation method is superior to that of a commercial catalyst material, and the Fe-based MOF catalyst is based on a non-noble metal-based material, so that the Fe-based MOF catalyst has the advantages of high efficiency, stability and low cost; comprising the following steps: (1) dissolving diaminoterephthalic acid in an organic solvent, then adding Fe (NO3) 3.9 H2O, uniformly stirring, heating, carrying out heating treatment, cooling to room temperature, centrifuging, taking precipitate, and drying to obtain an intermediate product; and (2) uniformly mixing a Co (NO3) 3.9 H2O solution with the intermediate product obtained in the step (1) to obtain a mixed solution, and carrying out ultrasonic treatment and drying to obtain the Fe-based MOF catalyst. The invention also discloses the catalyst and an application method thereof.

The invention belongs to the technical field of batteries, and particularly relates to a lithium titanium aluminum phosphate solid-state electrolyte and a preparation method and application thereof, and the chemical formula of the lithium titanium aluminum phosphate solid-state electrolyte is Li < 1 + x > Al < x > Ti < 2-x-y > M < y > (PO4) 3, the lithium aluminum titanium phosphate solid electrolyte is prepared from the following raw materials: a lithium source, a titanium source, a phosphorus source, an aluminum source, an M source and an auxiliary agent, wherein the auxiliary agent is used for promoting the lithium source, the titanium source and part of the phosphorus source to react to form an intermediate product. As the intermediate phase LiTiOPO4 cooperates with M source doping and substitution, Ti < 4 + > can be inhibited from being reduced into Ti < 3 + >, lattice collapse caused by titanium valence change in electrochemical circulation is avoided, and the ionic conductivity is improved; as the LiTiOPO4 intermediate phase is used for synthesizing the titanium aluminum lithium phosphate, the use amount of single phosphoric acid in the secondary sintering process can be reduced, the high-temperature liquid phase reaction is avoided, and the sintered finished product has the advantages of fluffiness and no sagger bonding; in the synthesis and sintering process of the lithium titanium aluminum phosphate, the LiTiOPO4 intermediate phase tends to form a continuous second phase network at the grain boundary of the LiTiOPO4 intermediate phase, so that the grain boundary impedance of the lithium titanium aluminum phosphate can be reduced.

The invention provides a waste plastic resource recycling device which comprises a rack, a reaction cavity is formed in the rack, a first electrode plate is arranged at the bottom of the reaction cavity, a punch installed through a telescopic device is arranged on the rack, a second electrode plate is arranged at the end of the punch, and the first electrode plate and the second electrode plate are connected with a Joule pulse generator. A feeding unit is arranged on the rack, and the reaction cavity is connected with a gas storage tank and a condensation collection mechanism. The high-pressure environment provided by the device not only promotes heat conduction, but also physically inhibits material expansion caused by volatilization of an intermediate product, and ensures the stability of an electric heating process, so that uniform heating of plastic particles is realized, and the temperature uniformity of a waste plastic sample can be ensured. CO2 reaches or is close to a supercritical state at high temperature and high pressure, excellent diffusivity and solvent property of CO2 are beneficial to transfer of heat to a deep layer of a material, CO2 can participate in a chemical reaction of carbon and hydrocarbon cracking free radicals, and generation of synthesis gas is promoted.

The invention discloses a process for rapidly removing impurity arsenic in crude antimony by using a refining pot, which comprises the following steps: adding crude antimony produced by a copper removal furnace into the refining pot, melting, then removing slag, blowing oxygen, and adding a proper amount of arsenic removal agent to produce an arsenic-removed antimony alloy; compared with the prior art, the method has the beneficial effects that arsenic in the materials can be rapidly removed, the smelting production efficiency is improved, the production cost is reduced, and conversion of intermediate products is accelerated.

The utility model discloses an ammonia nitrogen on -line analysis device, including support mainboard, detection device and reaction device, support mainboard bottom fixedly connected with motor, and the output fixedly connected with threaded shaft of motor has the sleeve, and the sleeve is fixedly connected on the waste collection box, and the sleeve is slidingly connected on the fixed plate, the utility model discloses, through the sample that will inhale of collection pump is sent to the reaction device, through the operation platform control reaction device and add specific reagent, and carry out accurate allocation reagent dosage, adopt the bubbling mixing technique and make water sample and reagent fully react, generate detectable intermediate product, through detection device and detect, through pressing sliding block, promote the limit block sliding, and then adjust the length of telescopic support column, realize the height of adjusting device, can adapt to different environment, the output rotation of motor drives threaded shaft rotation, and then drive waste collection box sliding, finally take out waste collection box, convenient and fast.

The invention belongs to the technical field of resin preparation, and particularly discloses low-dielectric polyphenylsiloxane epoxy composite resin and a preparation method and application thereof.The preparation method comprises the following steps that a component A, a component B, a component C and a catalyst are added into a reaction container at the room temperature; introducing inert gas, and heating to obtain an intermediate product D; adding a component E into the intermediate product D to obtain an intermediate product F; and uniformly stirring and mixing the intermediate product F, a curing agent and a catalyst, and carrying out segmented curing to obtain the bi-crosslinked polyphenylsiloxane epoxy composite resin. A large number of phenyl, siloxane, phosphorus / phosphine derivatives and other structures with large volume steric hindrance, low polarity and excellent thermal stability are introduced into the polyphenylsiloxane epoxy composite resin provided by the invention, so that the polyphenylsiloxane epoxy composite resin has excellent thermal stability, low dielectric property and excellent flame-retardant effect; the prepared polyphenylsiloxane epoxy composite resin has the characteristics of high flame retardance, low dielectric, high peel strength and high heat resistance.

The present application relates to a kind of preparation methods of 2-methylamino-3-formylpyridine, comprising the following steps: 3-cyanopyridine and dimethyl sulfate are heated to reflux reaction in organic solvent I, then base is added, continue to react under heating reflux condition, and obtain intermediate product 2-methylamino-3-formylpyridine.The raw material used in the preparation method of the present application is cheap and easy to obtain, the preparation process has few side reactions, and is easy to purify.Only the steps of extraction and heavy crystallization are needed to achieve high purity, and strict control of anhydrous reaction conditions is not required.The yield and purity are high, and the prepared 2-methylamino-3-formylpyridine is suitable for industrial large-scale production of 2-methylamino-3-hydroxymethylpyridine, and further preparation of eslicarbazepine acetate and / or eslicarbazepine acetate sulfate.