246 results about "Sodium methoxide" patented technology

The utility model discloses equipment for producing high-purity methyl ethyl ether, which relates to the field of synthesis of chemical compounds and comprises a reaction device, a heating component, a cold bath tank, a crude product receiving tank, a heavy component removal tower, a light component removal tower, a first reboiler, a second reboiler, a first condenser, a second condenser, a recovery tank, a product receiving tank and a controller, raw materials including sodium methoxide and halogenated ethane directly react under the anhydrous condition, a catalyst is not needed, crude methyl ethyl ether is produced, then the crude methyl ethyl ether enters a heavy component removal tower, crude methyl ethyl ether gas with heavy components removed enters a light component removal tower from the top of the light component removal tower after being detected to be qualified through a first online analysis and detection component, light component removal rectification is conducted, and methyl ethyl ether is obtained. Gas-phase impurities at the top of the light component removal tower are analyzed through the second online analysis and detection part, when the gas-phase impurities are detected to be qualified, the methyl ethyl ether product enters the product receiving tank, and then the high-purity methyl ethyl ether product is produced through continuous rectification, so that the product purity is high, the reaction temperature is low, the energy consumption is reduced, the reaction yield is high, and the production cost is low.

The invention discloses modified high-titanium heavy slag micro-powder, raw materials of the modified high-titanium heavy slag micro-powder comprise high-titanium heavy slag waste residues and an activating and modifying additive, and the compound activating and modifying additive comprises the following components in parts by weight: 15-20 parts of a dispersing agent, 35-40 parts of water, 30-35 parts of normal propyl alcohol, 6-10 parts of sodium methoxide, 0.5-2 parts of 1, 2-bis (triethoxysilyl) ethane and 7-12 parts of isobutyltriethoxysilane. The modified high-titanium heavy slag micro-powder is prepared by taking the high-titanium heavy slag waste residues and the composite activated modified additive as main raw materials and combining a grinding process, so that the activity and the water absorption performance of the high-titanium heavy slag micro-powder can be effectively improved, and the working performance, the mechanical property, the durability and the like of the obtained concrete can be ensured; and the related preparation method is relatively simple and relatively low in cost, and has remarkable economic and environmental benefits.

The utility model provides an energy-saving device for producing sodium methoxide, which comprises a reaction tower, a rectifying tower and a recovery tower which are connected in sequence, tower kettles of the rectifying tower and the recovery tower are respectively provided with a rectifying tower reboiler and a recovery tower reboiler, and a reaction tower reboiler is arranged in a tower kettle of the reaction tower. The tower top of the rectifying tower is connected with a tower kettle of the reaction tower through a rectifying tower gas phase pipeline I, a compressor I is arranged on the rectifying tower gas phase pipeline I, the rectifying tower gas phase pipeline I is connected with a rectifying tower gas phase pipeline II, the rectifying tower gas phase pipeline II is connected with the recovery tower reboiler, and a compressor II and a compressor III are arranged on the rectifying tower gas phase pipeline II; the rectifying tower gas phase pipeline II is connected with a rectifying tower gas phase pipeline III, the rectifying tower gas phase pipeline III is connected with a rectifying tower reboiler, and a rectifying tower reboiler discharge pipeline and a recovery tower reboiler discharge pipeline are respectively connected with the middle upper part of the rectifying tower; the energy utilization efficiency can be greatly improved, the energy consumption can be reduced, and the product purity can be improved.

The present invention provides a chemical synthesis method of EPS-G7, wherein β-cyclodextrin A is acetylated to obtain β-acetylcyclodextrin B, B is ring-opened in a mixed solution of acetic anhydride / concentrated sulfuric acid to obtain a chain acetylated heptose C, p-nitrophenol is condensed with intermediate C using boron trifluoride acetonitrile to obtain a key intermediate p-nitrophenyl (G1)-O-acetyl-D-maltoseptaglycoside D with α as the dominant configuration, D is removed from the acetyl group under the action of sodium methoxide to obtain pNP-G7 (p-nitrophenyl (G1)-D-maltoseptaglycoside), pNP-G7 is in the presence of p-toluenesulfonic acid and dimethoxyethane, and acetal protection is formed between the hydroxyl groups on C4 and C6 of the terminal monosaccharide to obtain EPS-G7. The reaction raw materials used in the method of the present invention are cheap and readily available, and the chemical synthesis of α-amylase detection reagent EPS-G7 is realized, which is a simple, economical and efficient synthesis method.

This invention discloses a method for preparing a high-temperature resistant, strongly basic anion exchange resin, belonging to the field of ion exchange resins. The method includes three steps: First, white spheres with a crosslinking degree of 6-10 undergo a chloromethylation reaction by sequentially adding zinc dichloride and tin tetrachloride to improve the uniformity of the chloromethyl group distribution in the chlorospheres; second, the chlorospheres undergo an etherification reaction using tetrabutylammonium bromide as a phase transfer catalyst, and the dropping rate of sodium methoxide solution is controlled to improve the etherification conversion rate; finally, the etherification product undergoes a quaternization reaction with a trimethylamine aqueous solution to obtain the strongly basic anion exchange resin. This invention, by selecting the degree of crosslinking and optimizing the catalyst addition method for chloromethylation and the sodium methoxide dropping rate for the etherification reaction, results in a more uniform distribution of quaternary ammonium groups in the resin, significantly improving the ion exchange capacity and high-temperature resistance of the resin.

The utility model provides a methanol energy-saving recovery device for sodium methoxide production, the methanol energy-saving recovery device comprises a reaction tower, a rectifying tower, a negative pressure tower, a secondary pressurizing tower and a pressurizing tower which are connected in sequence, a part of refined methanol gas phase at the top of the rectifying tower provides heat for a tower kettle of the reaction tower after being compressed, and a part of refined methanol gas phase provides heat for a rectifying tower reboiler after being compressed; a refined methanol gas phase at the top of the secondary pressurizing tower provides heat for a reboiler of the negative pressure tower; a refined methanol gas phase at the top of the pressurizing tower provides heat for a secondary pressurizing tower reboiler; an innovative efficient energy-saving technology is adopted, the recovery efficiency of methanol is remarkably improved, energy consumption is reduced, the overall production process is optimized, the mature reaction tower, rectifying tower, negative pressure tower, secondary pressurizing tower and pressurizing tower are adopted as equipment, the structure is simple, and then the installation, debugging and maintenance difficulty of the equipment is low; mature equipment is not prone to faults, and stability and continuity of production are guaranteed.

The invention belongs to a production system and a production process of sodium methoxide. Comprising a sodium methoxide reaction tower, a methine solution pipeline, a refined methanol pipeline and a sodium methoxide storage tank, the methine solution pipeline is connected with an inlet in the upper portion of the sodium methoxide reaction tower through a tube pass of a methanol reaction tower kettle liquid heat exchanger, and a liquid phase outlet in the bottom of the sodium methoxide reaction tower is connected with an inlet of a sodium methoxide reaction tower kettle liquid evaporator; a liquid phase outlet of the sodium methoxide reaction tower kettle liquid evaporator is connected with a sodium methoxide storage tank through a methanol reaction tower kettle liquid heat exchanger shell pass; the refined methanol pipeline is connected with a lower gas-phase inlet of the sodium methoxide reaction tower through a tower top heat exchanger shell pass of an amide rectifying tower in the amide production unit, and the refined methanol pipeline is connected with a lower gas-phase inlet of the sodium methoxide reaction tower through a bottom liquid heat exchanger tube pass of a methanol rectifying tower in the amide production unit; according to the thermodynamically coupled sodium methoxide-amide collaborative production system, a cross-device energy and material collaborative network is constructed, so that the double breakthrough characteristics of energy conservation and product quality improvement are realized.

The invention provides a preparation method of a waterborne polyurethane acrylate wear-resistant anticorrosive coating, which comprises the following steps: (1) in the presence of sodium methoxide as a catalyst, diethanol amine reacts with palm oil, so that active hydroxyl groups are grafted on the surface of the palm oil, which is beneficial to the subsequent reaction of waterborne polyurethane; (2) performing reaction on isophorone diisocyanate, the modified palm oil and pentaerythritol triacrylate to obtain waterborne polyurethane acrylate; and (3) grafting isophorone diisocyanate onto the graphene, and then reacting the graphene graft with N, N-dimethylethanolamine, so that more active sites are provided for the surface of the graphene after grafting, and the dispersity and compatibility of the graphene are improved. The method is simple and convenient to operate and few in process steps; the reaction time is short and the energy consumption is low; the raw materials are cheap, easily available and environment-friendly; the prepared waterborne polyurethane acrylate coating is good in wear resistance and corrosion resistance.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of 1, 1-cyclohexyl diacetic acid. The preparation method comprises the following steps: taking cyclohexanone and ethyl cyanoacetate as raw materials to react and dehydrate to prepare a product 1, then reacting cyanoacetamide, sodium methoxide and the product 1 at low temperature to obtain a product 2, and then hydrolyzing the product 2 under the catalysis of a magnetic solid double-acid catalyst to obtain the 1, 1-cyclohexyl diacetic acid. The used magnetic solid double-acid catalyst is prepared by loading a metal active layer and a sulfonic acid group on a magnetic mesoporous silicon dioxide carrier step by step, and has Lewis acid and Bronsted acid sites, and the catalyst is separated by an external magnetic field after the reaction. The method is short in reaction time and high in catalytic efficiency, the catalyst can be recycled, the separation problem of traditional homogeneous acid catalysis is avoided, and the method has the advantages of being mild in reaction condition, high in yield, environmentally friendly and the like and is suitable for industrial production of 1, 1-cyclohexyl diacetic acid.

This invention discloses a method for preparing sodium houttuynia cordata, comprising the following steps: adding sodium methoxide and toluene to a reaction vessel, heating, then slowly adding nonanone and ethyl formate, and after the addition is complete, reacting with a gradient cooling process, and post-processing to obtain an aqueous phase containing intermediate I; adding the aqueous phase containing intermediate I and toluene to the reaction vessel, stirring, cooling, and rapidly introducing liquid sulfur dioxide, continuously stirring and reacting at 0-10°C for 5-15 minutes, cooling, and filtering to obtain crude sodium houttuynia cordata. The preparation method of this invention directly introduces liquid sulfur dioxide during the sulfonation reaction, greatly shortening the process time, while achieving high product yield and purity, and requiring less sulfur dioxide. Furthermore, in the post-processing of sodium houttuynia cordata, adding toluene to the reaction solution beforehand can effectively transfer the generated impurities to the toluene; recrystallization using a 50 v / v% ethanol aqueous solution removes water-soluble and oil-soluble impurities while further reducing the risk of fire and explosion during centrifuge operation.

The invention discloses a battery grade methyl ethyl carbonate / diethyl carbonate synthesis process, which adopts a transesterification method, and dimethyl carbonate (DMC) and ethanol react under the catalysis of sodium methoxide to generate methyl ethyl carbonate (EMC), diethyl carbonate (DEC) and byproduct methanol. High-purity battery-grade EMC and DEC products are obtained through the steps of reactive distillation, azeotrope separation, methanol refining, catalyst carbonization removal, crude EMC / DEC separation, EMC light component removal, industrial-grade EMC refining, battery-grade EMC refining, industrial-grade DEC refining, battery-grade DEC refining and the like. The method has the advantages of simple process flow, low energy consumption, easiness in product separation, high product purity and the like, and is suitable for large-scale production of battery-grade carbonate products.

The invention belongs to the field of organic synthesis, and particularly provides an integrated synthesis method of chlorocarbonyl [4-(trifluoromethoxy) phenyl] methyl carbamate, which comprises the following steps: dropwise adding methyl chloroformate, slowly dropwise adding a NaOH solution, separating liquid, adding the NaOH solution again, azeotropic with water, and realizing integrated synthesis, thereby obtaining the chlorocarbonyl [4-(trifluoromethoxy) phenyl] methyl carbamate. The intermediate [4-(trifluoromethoxy) phenyl] methyl carbamate can be directly used for preparing sodium salt in the next step without discharging, drying and other operations in the synthesis process, and moisture absorption sensitive substances such as sodium hydride, potassium tert-butoxide, sodium methoxide and the like do not need to be used, so that the safety and stability of the synthesis process are improved.

The utility model discloses a steam delivery device for sodium methoxide synthesis, include: gas pipe, the first joint subassembly of assembly on gas pipe, the first joint subassembly is used for transportation sodium alcohol, above -mentioned device through the air pressure of straight cylinder inside heightening, promote the cylindrical air bag in air bag part to the gas pipe direction removal. Cylindrical air bag is closely combined with the inner wall of gas pipe in the moving process, under the push of air pressure, the methanol steam remaining in gas pipe is pushed forward and is arranged in sodium methoxide synthesis tower. At this moment, the area increasing groove on cylindrical air bag can effectively increase the contact area with the inner wall of gas pipe, enhance the leakproofness, reduce steam leakage, and the air pressure balance pipe can balance the air pressure in air bag part, avoid the air bag to break because of excessive pressure. Even if the air bag part of multiple has one because of accidental breakage, other unbroken air bag part still can keep good leakproofness, continue to play the sealing and pushing and shoving effect, ensure that the methanol steam in gas pipe can be effectively discharged.

The present invention relates to a method of preparing a heterogeneous linear carbonate, the method including performing a transesterification reaction of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst, wherein the catalyst is one or more selected from the group consisting of lithium methoxide (LME), lithium ethoxide (LEE), sodium methoxide (SME), sodium hydroxide (NaOH), and a mixture thereof, and the catalyst is input in a state of being dissolved in a sulfoxide-based solvent.

The invention relates to a water-soluble ultraviolet absorbent 4-disubstituted aminobenzyl subunit camphorsulfonic acid and a synthesis method and application thereof, and the synthesis method comprises the following steps: in a toluene-methanol mixed solvent, carrying out heating reflux reaction on camphorsulfonic acid and 2 equivalent weight of sodium methoxide, and after enolation conversion is completed, carrying out reduced pressure distillation to obtain the 4-disubstituted aminobenzyl subunit camphorsulfonic acid. Slowly dropwise adding a corresponding 4-disubstituted aminobenzaldehyde solution with the molar weight equal to that of camphorsulfonic acid, continuously heating and stirring to react for 6-12 hours, adding water to terminate the reaction, acidifying the reaction solution by using hydrochloric acid or sulfonic acid type cation exchange resin, separating to remove methylbenzene, adjusting the pH value of a water phase to about 6.5, performing rotary evaporation dehydration under reduced pressure, and extracting a crude product by using a conventional method; a target product can be obtained through column chromatography purification, and the target product not only has water solubility, but also has the characteristic of absorbing UVA and UVB ultraviolet light at the same time; the composition can be applied to sun-screening agent products, cosmetics or home care products, and also can be applied to various industrial products such as paint, varnish, plastics, textiles and rubber to improve the light resistance of the industrial products.

The invention provides a preparation method of fluoride ether bacteria amide, which comprises the following steps: dissolving pentafluorobenzonitrile in a solvent, dropwise adding a sodium methoxide solution at-10-30 DEG C for 2-15 hours, continuing to carry out heat preservation reaction for 0.5-2 hours after dropwise adding, and carrying out post-treatment to obtain 2, 3, 5, 6-tetrafluoro-4-methoxybenzonitrile; the preparation method comprises the following steps: jointly dissolving 2, 3, 5, 6-tetrafluoro-4-methoxybenzonitrile, 3-chloro-5-(trifluoromethyl) pyridine-2-yl) methanol and a catalyst acid in a solvent, reacting at 50-110 DEG C for 5-32 hours, and performing post-treatment on the obtained reaction liquid to obtain fluoride ether bacteria amide, according to the method, sodium methoxide and pentafluorobenzonitrile which are low in price and easy to obtain are subjected to etherification reaction, thionyl chloride and bis (trichloromethyl) carbonate are not used, the green chemical principle is met, and the method has the advantages of being short in step, safe and easy to operate and the like, so that the method has high implementation value and practical production applicability.

This invention relates to a safety control method and system for the preparation of ethyl methyl carbonate (EMC). The method involves feeding dimethyl carbonate into an EMC purification tower, monitoring the pressure within the tower, and adjusting the pressure if it falls outside a preset range. The purity of the output dimethyl carbonate is also monitored. The output dimethyl carbonate, a sodium methoxide / methanol solution, and anhydrous ethanol are mixed in a specified ratio in a raw material mixing unit to achieve the required homogeneity. Pressure and temperature are monitored in an EMC reaction tower; if these requirements are not met, pressure or temperature is adjusted. The bottom liquid from the EMC reaction tower is transferred to a waste catalyst concentration tank for further processing, and then to an EMC light-weight removal tower for further treatment. Temperature and pressure are monitored within the EMC light-weight removal tower; if the pressure falls outside a preset range, pressure or temperature is adjusted. After cooling, the final EMC product is obtained. This process ensures safe and stable production of ethyl methyl carbonate.

The invention relates to the technical field of metal organic complexes, in particular to a fluorene-containing alkyl zinc complex and a preparation method and application thereof, and the preparation method comprises the following steps: adding fluorene, potassium tert-butoxide and sodium methoxide into a solvent, and reacting to obtain 9-fluorene formaldehyde; the preparation method comprises the following steps: dissolving 9-fluorene formaldehyde in a solvent, adding an amino compound and a catalyst, and reacting to obtain a formyl fluorene imine ligand; and reacting the formyl fluorene imine ligand with zinc alkyl to obtain the zinc alkyl complex. The invention provides a fluorenyl-containing zinc complex as well as a preparation method and application thereof. The fluorenyl-containing zinc complex is short in reaction route, simple and convenient to operate and capable of efficiently catalyzing an imine hydroboration reaction. Meanwhile, the fluorenyl-containing zinc complex disclosed by the invention is used as a catalyst, is small in usage amount, mild in reaction condition and high in yield, and can catalyze hydroboration reaction of various compounds.

The invention relates to the technical field of chemical pharmacy, in particular to a preparation method and application of troxerutin, and hydroxyethylation reaction is carried out on phenolic hydroxyl groups on a rutin flavone skeleton. Specific two-stage reaction is adjusted, and catalysts sodium hydroxide and sodium methoxide are selected in the first stage; in the second stage, the pH value is adjusted, and the high-purity and high-yield troxerutin is prepared under certain conditions by adopting a catalyst with a specific combination and a specific ratio, the purity can reach 99% or above after simple purification, and the yield reaches 93% or above. Furthermore, the invention also relates to an orally disintegrating tablet and a multi-layer slow-release dressing.

The utility model discloses an automatic sodium methoxide adding device which comprises a device body, the front face of the device body is fixedly connected with a circuit base, the bottom face of the device body is fixedly connected with a machine cover, and the inner wall of the machine cover is fixedly connected with a motor. The output end of the motor sequentially penetrates through the machine cover and the device body and extends into the device body. According to the device, parameters such as the concentration and the flow velocity of a sodium methoxide solution can be set through the touch panel, impurities in the sodium methoxide solution can be filtered out after the sodium methoxide solution is filtered through the filter seat and the filter screen, the purity of the solution is improved, errors in the experiment process are reduced, and the temperature of the sodium methoxide solution can be adjusted by starting the heating tank after the sodium methoxide solution is conveyed into the device body. And finally, a motor is started to drive a stirring rod, and a sodium methoxide solution and an added substance are fully mixed by utilizing a mixing blade, so that the mixing of the sodium methoxide solution and the added substance can be accelerated.

The invention discloses a polyurethane or polyurea aqueous dispersion with high humidity and heat resistance as well as a preparation method and application thereof. The aqueous dispersion is prepared by reacting the following components: a) polyester diol and / or polyol, b) di-and / or polyisocyanate which at least contains more than 50% by mass of toluene diisocynate, c) a monofunctional or polyfunctional polyethoxy chain segment-containing component which is synthesized by taking sodium methoxide as a catalyst and has reaction activity to isocyanate, and d) a polyethoxy chain segment-containing component which has reaction activity to isocyanate. D) a sulfonic acid type hydrophilic compound; e) a low molecular compound containing hydroxyl and containing at least two NCO reactive amino groups; wherein the ratio of the sodium ions in the component c) to the toluene diisocynate in the component b) is 10 ppm to 100 ppm. Sodium ions can catalyze a small amount of isocyanate groups to react with carbamate bonds to generate allophanate bonds in a polyurethane synthesis process, so that a trace cross-linked structure is introduced into a polyurethane chain segment, and the heat resistance / damp heat resistance of a product is improved.

The utility model discloses a hydrolysis device applied to sodium methoxide wastewater, which comprises a support, a reaction kettle arranged on the support, a feed port, a water inlet, an exhaust port and an oil discharge port sequentially arranged at the top of the reaction kettle, a discharge port arranged at the bottom of the reaction kettle, a guide rod vertically arranged in the reaction kettle, a sliding sleeve sleeved on the guide rod, and a lifting pipe arranged on the side surface of the sliding sleeve. The upper end of the lifting pipe is connected with one end of a telescopic hose, the other end of the telescopic hose is connected with an oil outlet formed in the top of the reaction kettle, a supporting plate is arranged on the side wall of the reaction kettle, a first motor is arranged on the supporting plate, and an output shaft of the first motor penetrates through the side wall of the reaction kettle and extends into the reaction kettle. One end of the pulling rope is connected with the winding drum, and the other end of the pulling rope is connected with the sliding sleeve. The device disclosed by the utility model is high in hydrolysis efficiency, and the hydrolyzed oil phase and water can be quickly separated, so that the efficient recycling of the sodium methoxide wastewater is realized.

A liquid treatment composition for remediating and removing mercaptans, H2S and other sulfur based contaminants from contaminated hydrocarbon liquids, the treatment composition consisting essentially of a carrier solvent and at least one alkoxide compound. The liquid treatment composition may contain no terpene. Further, the liquid treatment composition may include water. The at least one alkoxide compound includes at least one of sodium methoxide and sodium ethoxide.

This invention discloses a method for preparing the DPP1 inhibitor bresocarte, belonging to the field of pharmaceutical synthesis. Specifically, the method includes the following steps: N-tert-butoxycarbonyl-L-4-bromophenylalanine reacts with methanesulfonyl chloride or 4-nitrobenzenesulfonyl chloride in the presence of a base, followed by amination substitution to obtain intermediate 1; then, it undergoes dehydration in the presence of trifluoroacetic anhydride to obtain intermediate 2; next, it undergoes a coupling reaction with pinacol diboronate to obtain intermediate 3; then, it undergoes a coupling reaction with bromide compound 4 to obtain intermediate 5; then, it undergoes cyclization with di-tert-butyl dicarbonate in the presence of sodium methoxide to obtain intermediate 6; then, it undergoes deprotection in the presence of hydrogen chloride to obtain intermediate 7; next, it undergoes condensation with compound 8 to obtain intermediate 9; finally, it undergoes deprotection in the presence of hydrogen chloride to obtain the inhibitor bresocarte. This method provides a new synthetic approach, with low overall cost, simple operation, high yield, and suitability for industrial production.

The invention discloses a preparation method of a high-compatibility organic silicon softening agent. Comprising the following steps: a, reacting hydroxyl silicone oil with bio-based fatty acid ester under the protection of nitrogen by taking sodium methoxide as a catalyst to obtain an organic phase product; and b, adding nano silicon dioxide into the product obtained in the step a, uniformly dispersing under the assistance of ultrasonic waves, adding polyether amine and water, carrying out high-speed shearing emulsification to form a microemulsion, adding sodium polyaspartate, and uniformly mixing to obtain the high-compatibility organic silicon softening agent. Effective preparation of the high-performance and high-compatibility fabric softener is realized, and production requirements are met.

The invention discloses a preparation method of a cresol trozole trisiloxane intermediate, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: by taking 2, 6-dibromo-4-methylphenol as a raw material, reacting with 3, 4-dihydropyran under the action of p-toluenesulfonic acid, so as to generate an intermediate 2-(2, 6-dibromo-4-methylphenoxy) pyran; reacting with sodium methoxide under the action of a catalyst to generate an intermediate 2-(2-bromo-4-methyl-6-methoxyphenoxy) pyran; then generating a Grignard reagent, carrying out coupling reaction on the Grignard reagent and 3-bromine-2-methallyl, finally reacting with benzotriazole lithium salt, and carrying out acidolysis deprotection to obtain the cresol trozole trisiloxane intermediate. The raw materials are available in the market, the overall yield is high, and a route reference is provided for synthesis of the compounds.

The application discloses a kind of carbon quantum dot materials and its preparation method and application, specifically related to the field of battery material.It includes: p-xylylene formaldehyde and p-trifluoromethyl phenyl cyanide acetonitrile are placed in sodium methoxide solution to carry out hydrothermal reaction, obtain carbon quantum dot material;PAN powder is mixed with DMF to obtain PAN spinning solution;Carbon quantum dot material is dispersed in PAN spinning solution, to obtain mixed spinning liquid;Mixed spinning liquid is spun on the surface of zinc foil by electrostatic spinning, to obtain modified zinc foil.Carbon quantum dot material rich in multiple types of zincophilic functional groups synthesized by hydrothermal method strategy can improve the electric field distribution of zinc metal surface, and then uniform zinc ion deposition and nucleation process, avoid zinc dendrite formation, use modified zinc foil as the anode material of aqueous zinc ion battery, and carbon quantum dot material with abundant negative electric functional groups can repel sulfate ions in electrolyte, to inhibit the formation of byproduct.

The invention discloses a sodium methoxide integrated production system which comprises a reaction kettle, a dryer and a quantitative forming mechanism, the quantitative forming mechanism comprises a first fixing plate and a second fixing plate, the second fixing plate is supported and fixed through a supporting frame, and the first fixing plate is fixed to the top end of the second fixing plate through a support. An extrusion opening and a first discharging opening are formed in the first fixing plate, a second discharging opening is formed in the second fixing plate, the second discharging opening is located under the first discharging opening, an extrusion plate and a discharging plate are arranged at the top end of the first fixing plate, and an extrusion die is arranged between the first fixing plate and the second fixing plate. The finished product sodium methoxide is pressed into a cake shape, compared with direct packaging of powder, the cake-shaped structure is more regular and can be arranged more tightly, waste of packaging space is reduced, and the packaging efficiency is improved.

The application belongs to the technical field of chemical industry, and particularly relates to a mixed cresol separation method, which comprises selective oxidation, filtration, neutralization, secondary filtration and rectification processes in sequence. The selective oxidation comprises: adding mixed cresol, sodium hydroxide, sodium methoxide, a solvent and a catalyst into an oxidation kettle, heating, and introducing oxygen for selective oxidation. In the selective oxidation step, sodium methoxide is added, which can react with water obtained in a salification reaction step (i.e. a reaction step of sodium hydroxide and mixed cresol to generate sodium phenate and water) to generate methanol and sodium hydroxide, thereby promoting the selective oxidation reaction and improving the yield.

The utility model discloses a methanol alkali solution preheating device for sodium methoxide production, which comprises an evaporator, an evaporation tank is arranged at the upper part of the evaporator, an evaporation preheating sleeve is arranged on one side of the evaporation tank, an exhaust condensation pipe is arranged on one side of the evaporation preheating sleeve on the evaporation tank, and the exhaust condensation pipe is communicated with the evaporation preheating sleeve. The exhaust condensation pipe is connected to the evaporation preheating sleeve; the utility model relates to the technical field of sodium methoxide production, in particular to a methanol alkali solution preheating device for sodium methoxide production, which is used for preheating a methanol alkali solution before evaporation and preheating the methanol alkali solution by utilizing the heat of separated steam of an evaporator, an integrated evaporation sleeve is adopted as a preheating structure and is connected with a pipeline for separating the steam through a flange, and the evaporation sleeve is connected with a pipeline for separating the steam. Meanwhile, the valve is used for control, the structure is simple, preheating control is convenient, and the heat utilization rate and the reaction efficiency can be effectively improved.