52results about How to "Increase responsiveness" patented technology

The invention provides an amine low-water-content absorbent for capturing carbon dioxide and application of the amine low-water-content absorbent. The amine low-water absorbent comprises, by mass, 20%-50% of an absorbent main agent, 35%-70% of an auxiliary solvent and 2%-20% of water, and the range of a solvent effect factor delta of the amine low-water absorbent is 0.28-0.32. According to the method, the composition of the water-less absorbent is screened and optimized through a solvent effect factor formula, the amine water-less absorbent which is easy to desorb, low in regeneration energy consumption and low in viscosity characteristic is obtained, and wide application of the amine water-less absorbent in a carbon capture technology is promoted.

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a preparation method of a UV (ultraviolet) viscosity-reducing adhesive tape, which comprises the following steps: taking 100g of polymer, adding 10-80g of ethyl acetate, an isocyanate curing agent and a photoinitiator, then uniformly stirring, standing and defoaming to obtain an adhesive, uniformly coating a PET (polyethylene terephthalate) release film with the standing adhesive, putting into a drying oven to bake and dry, then attaching to a PO (polyolefin) base film, and drying to obtain the UV viscosity-reducing adhesive tape. And putting the adhesive tape process product into an aging room, and placing the adhesive tape process product at normal temperature for 7 days to obtain the UV viscosity-reducing adhesive tape of the PO base material. The UV viscosity-reducing adhesive tape disclosed by the invention can realize the performance that a common UV viscosity-reducing adhesive tape cannot be balanced in a severe environment, has the general characteristics of high adhesive force at an initial stage and extremely low adhesive force after UV treatment in the aspect of performance, can resist strong acid corrosion before UV treatment, can be applied to acid etching protection of glass, can be subjected to viscosity-reducing stripping through UV irradiation after an etching process is completed, and is low in adhesive force and high in adhesive force. And automatic operation is easy, and no adhesive residue risk exists.

The invention discloses a production abnormal event monitoring method and system and a readable storage medium, and the method is characterized in that the method comprises the steps: extracting event features corresponding to monitoring tasks according to the event level of each monitoring task in a monitoring queue; under the condition that an operation of a user for a target monitoring service is received, a target monitoring task is added into the monitoring queue, and the event level of the target monitoring task is controlled to be higher than at least one event level in the monitoring queue; when the event feature extraction of the target monitoring task is completed, calculating the event risk degree of the target monitoring service, and generating a risk characterization result; and displaying a risk monitoring page of the target monitoring service based on the risk representation result. According to the invention, by adding control means for the monitoring queue, the response degree of the monitoring event is improved, and meanwhile, the accuracy of the monitoring task is improved by utilizing the multi-dimensional event characteristics.

The invention discloses a carbon negative electrode material production device and process, and relates to the technical field of carbon negative electrode material production, the carbon negative electrode material production device comprises a heating mechanism, a rotating mechanism, a wall adhering mechanism, a ventilation mechanism and a carbon powder collecting mechanism; the heating mechanism comprises a cylinder body, a cavity is formed in the cylinder wall of the cylinder body, a heater is fixed in the cavity, and the heating mechanism is used for heating gas to react; the rotating mechanism is connected with the heating mechanism and used for driving the wall attaching mechanism to rotate and switch stations. Natural gas is fully attached to a heating position in an extrusion wall attaching mode, the natural gas fully reacts, the reaction degree of the natural gas is improved, the phenomenon of incomplete reaction of the natural gas is avoided, the heating position is cleaned, it is avoided that carbon powder is left at the heating position to affect heating, and waste caused by carbon powder left at the heating position is reduced; and meanwhile, gas and solid are separated by utilizing the characteristics of reactants, so that dust is prevented from remaining in the pipeline when the gas and the dust are mixed and discharged.

The invention discloses a preparation method of a silicon carbide coating on the surface of a graphite base. The preparation method comprises the following steps: (1) carrying out ultrasonic cleaning on the graphite base; (2) dispersing graphite powder, silicon powder and silicon carbide powder into a polyvinylpyrrolidone aqueous solution to obtain a coating solution; (3) coating the surface of the graphite base with the coating liquid in the step (2), and drying; (4) placing the graphite sagger filled with the solid silicon material in a vacuum siliconizing furnace, placing the graphite base on a bracket in the graphite sagger, and carrying out gas-phase siliconizing treatment; the solid silicon material is a mixture of silicon and silicon dioxide; (5) the graphite base subjected to siliconing treatment is put into acid liquor to be etched; the preparation method is simple in process, the prepared silicon carbide coating is uniform in covering, excellent in adhesive force, high in density and low in cost, the oxidation resistance of the graphite base in a high-temperature environment is improved, and the service life of the graphite base in the high-temperature environment is prolonged.

The invention discloses a low-temperature cured bi-component epoxy resin conductive adhesive. A component A and a component B are mixed according to a ratio of 1: 1 and then cured at room temperature; the component A at least comprises the following components: novolac epoxy resin, epoxy resin, core-shell toughened epoxy resin, a diluent, a coupling agent, a thixotropic agent and a conductive filler; the component B at least comprises the following components in parts by mass: a curing agent and an accelerant; wherein the core-shell toughened epoxy resin is bisphenol A epoxy resin with uniform nanoscale core-shell particle dispersity; the invention also discloses a preparation method of the low-temperature cured bi-component epoxy resin conductive adhesive. The curing of the conductive adhesive at low temperature or room temperature is realized, the internal reaction degree of the matrix is high, the mechanical strength and conductivity of the conductive adhesive are met at the same time, and effective bonding is realized and relatively good performance is kept after electronic components are cured in application scenes with use temperature requirements.

The invention relates to the technical field of aerobic treatment biology, and discloses an aerobic treatment biological synergistic process which comprises the following steps: adding sewage or organic waste or biogas residue / biogas slurry into a first flora culture tank; adding a PH regulator to regulate the PH value; and introducing gas into the first flora culture tank by using an air blower for stirring. According to the aerobic treatment biological synergistic process, the targeted dominant flora can be autonomously cultured according to different treatment objects, and the autonomously cultured flora is automatically added by monitoring various parameters, so that the aerobic reaction process is accelerated, the reaction degree is improved, the reaction time of aerobic treatment is shortened, the process treatment effect is improved, and the treatment cost is reduced. For a sewage aerobic biological treatment process, the COD (Chemical Oxygen Demand) removal rate can be improved; for a process for producing an organic fertilizer through aerobic treatment of organic wastes, the decomposition degree of the organic fertilizer can be improved, the quality of the organic fertilizer can be improved, manual operation is not needed, full-automatic control operation can be realized, meanwhile, dependence on external bacteria or flora is avoided, and the method is worthy of popularization.

The invention discloses a slope cropland soil solidifying material based on agricultural waste and a preparation method thereof, and the slope cropland soil solidifying material is prepared from the following raw materials in parts by weight: 150-200 parts of a calcium lignosulphonate solution, 150-200 parts of a vinasse urease bacterium solution, 15-20 parts of phosphogypsum, 3-5 parts of urea, 2-3 parts of magnesium nitrate, 2-3 parts of calcium hydrophosphate and 2-3 parts of potassium carbonate. Wherein the calcium lignosulphonate solution is obtained by alkali treatment of corncobs, and the vinasse urease bacterial liquid is obtained by two-stage fermentation of corn vinasse with bacillus amyloliquefaciens and bacillus pasteurii. The prepared slope cropland soil solidification material can effectively utilize agricultural wastes, and can improve the soil structure and soil fertility and promote the growth of slope cropland plants while reducing water and soil loss.

The invention provides a method for preparing a lithium iron manganese phosphate composite positive electrode material based on a sol-gel method, and belongs to the technical field of lithium ion battery positive electrode materials. The method comprises the following steps: respectively preheating raw material solutions to a preset temperature; the method comprises the following steps: uniformly mixing a manganese salt solution with a complexing agent solution, adding a ferrite solution, a phosphorus-containing compound solution and a lithium salt solution, and dropwise adding concentrated ammonia water to obtain a reaction solution; placing the reaction solution in an ultrasonic-microwave combined reaction system, and performing ultrasonic treatment, ultrasonic-microwave cooperative treatment and microwave treatment to obtain xerogel; performing thermal decomposition treatment, adding a carbon source into a cooled product, and performing grinding and demagnetizing treatment to obtain precursor powder; and carrying out microwave gradient high-temperature sintering on the precursor powder in a microwave reaction system under a protective atmosphere condition, and cooling to obtain the lithium iron manganese phosphate composite positive electrode material. According to the invention, the preparation period is shortened, the uniformity of the material is effectively improved, and the prepared positive electrode material shows excellent dispersity, electronic conductivity and stability.

The invention relates to a method for preparing a fluorine-doped tin oxide transparent conductive film through ultrasonic atomization and application of the fluorine-doped tin oxide transparent conductive film, adopted fluorine-doped tin oxide transparent conductive film spraying liquid comprises the following components: a tin source, alcohol, a fluorine-containing dopant and lithium hydroxide, and the pH value of the spraying liquid is 2.0 or above. Therefore, the acidity is lower than that of the traditional film, the microdefect of the film layer can be improved, the surface roughness of the film is reduced, the gas adsorption capacity of the film layer is reduced, and the film resistor stability is improved. According to the preparation method, the combination of trifluoroacetic acid and lithium hydroxide is innovatively adopted, the acidity is reduced and controllable, the film forming thickness is controllable, the fluorine doping level is high, the problems of film growth and corrosion of coating equipment can be well solved, and conditions are provided for preparation of a high-quality FTO film.

The invention relates to the technical field of air detection, and particularly discloses a method for measuring formaldehyde content in indoor air, which is used for measuring indoor formaldehyde gas by potentiometric titration and comprises the following steps: firstly, preparing a K2Cr2O7 standard solution, a Fe < 2 + > standard solution and a formaldehyde standard solution; secondly, taking a K2Cr2O7 standard solution as an absorption liquid of formaldehyde gas, adding sulfuric acid and distilled water, heating in a water bath, transferring into a gas sampler, and sampling air to obtain a sample collection liquid; and placing the sample collection solution in a water bath kettle, continuously heating, titrating the excess K2Cr2O7 and formaldehyde blank sample by using an automatic potentiometric titrator by using a Fe < 2 + > standard solution as a titrating solution, and calculating the content of formaldehyde in the air. The method disclosed by the invention is simple to operate and accurate in determination, the reaction speed can be increased, the reaction degree can be improved, the lowest detection limit can reach 0.006 mg / m < 3 >, and the method can be used for determining the indoor formaldehyde content. The problems that in the prior art, operation is tedious, the duration time is long, and the detection limit is too high are solved.

The invention belongs to the field of waste liquid recycling, and discloses a method for preparing potassium fluosilicate by using mixed waste acid, which comprises the following steps: S1, silica fume acidification pretreatment: soaking silica fume in an acid solution for acidification, carrying out precipitation separation on the silica fume, drying, and grinding to obtain acidified silica fume; s2, mixing the raw materials: uniformly mixing the acidified silica fume and the silicon dioxide powder; s3, preparation of fluosilicic acid: adding a mixture of acidified silica fume and silicon dioxide powder into the mixed waste acid, and uniformly stirring by a mechanical stirrer; and S4, preparation of potassium fluosilicate: adding a potassium chloride saturated solution into the fluosilicic acid solution to generate potassium fluosilicate precipitate. The method has the advantages and effects of being high in fluorine ion utilization efficiency, low in production cost and high in finished product purity.

The invention belongs to the technical field of coatings, and discloses a water-based bi-component photocureable coating as well as a preparation method and application thereof. The water-based bi-component photocureable coating is prepared from the following raw materials: an acrylic monomer, an acrylate monomer, an initiator, an isocyanate monomer, hydroxyl vinyl ether, a bio-based material, a hydrophilic modifier, epoxy resin, an acrylamide monomer and a neutralizer. In the preparation raw materials, the bio-based material is vegetable oil containing more than three epoxy groups, and the epoxy resin is epoxy resin containing more than three epoxy groups; a double-bond-containing component of the water-based two-component photocureable coating is a polyacrylate dispersion containing vinyl ether double bonds and acrylamide double bonds, and an epoxy group-containing component of the water-based two-component photocureable coating is hydrophilic modified epoxy resin. A paint film of the water-based bi-component photocureable coating has the characteristics of high flexibility, good chemical resistance, excellent adhesion to various substrates and the like.

The invention belongs to the technical field of medicines, and particularly relates to application of inula flower lactone HA in preparation of a medicine for preventing or treating depression, and the structure of the inula flower lactone HA is as shown in a formula I. A chronic social contusion stress induced model mouse test proves that the inula flower lactone HA has an obvious improvement effect on depression-like behaviors and has anti-depression activity, and a thought and a scheme are provided for developing the compound into an anti-depression drug in the future. And the formula I of the # imgabs0 # is shown in the specification.

The application discloses a tobacco extract preparation method, which comprises the following steps: (1) one-time feeding: preparing a carbonated salt-amino acid mixed aqueous solution, uniformly applying the mixed aqueous solution to tobacco raw materials, and standing at room temperature; (2) drying: performing heating treatment on the tobacco raw materials after feeding, and drying; (3) secondary feeding: uniformly applying a polyol to the dried tobacco raw materials; (4) extrusion: performing extrusion and puffing treatment on the tobacco raw materials after feeding, and obtaining treated tobacco raw materials; and (5) extraction: performing extraction and separation on the treated tobacco raw materials, and obtaining a tobacco extract. The carbonated salt-amino acid solution can improve feeding uniformity, improve the pH of the system to reduce nicotine, drying is beneficial to subsequent reactions, the polyol improves material fluidity and prevents extrusion die blockage, extrusion and puffing high-temperature and high-pressure degrade macromolecules, and the tobacco aroma is improved. The extract can be used for heat cigarettes, the aroma is richer, and the odor and irritability are obviously reduced.

The present application relates to the technical field of magnetic material, in particular to a kind of reverse microemulsion composition, iron oxide magnetic particle reverse microemulsion and its preparation method and application, core-shell type iron oxide magnetic particle and its preparation method.The composition contains iron salt reverse microemulsion component and alkaline reverse microemulsion component;The iron salt reverse microemulsion component contains the following components independently stored or more than two mixed storage: cationic surfactant A, anionic surfactant A, soluble iron source, organic solvent A, water;The alkaline reverse microemulsion component contains the following components independently stored or more than two mixed storage: cationic surfactant B, anionic surfactant B, soluble alkali, organic solvent B, water.The reverse microemulsion composition of anion / cation complex surfactant is proposed in the present application, and relatively small size reverse microemulsion droplet can be prepared.

The utility model relates to the technical field of waste acid treatment equipment, and solves the problems that a heating mode in the prior art is easy to damage heating equipment and consumes more energy. The hot galvanizing pickling waste acid treatment equipment comprises a supporting frame, a dissolving tank used for receiving waste acid liquid is arranged at the upper end of the supporting frame, a waste acid liquid pretreatment device is arranged at the upper end of the dissolving tank, the dissolving tank comprises a tank pool installed on the supporting frame, the interior of the tank pool is hollow, and a reaction tank is arranged in the tank pool; a blocking plate connected with a top plate of the tank is arranged at the upper end of the reaction tank, the tank comprises a liquid passing channel and a reaction tank, the forming depth of the reaction tank is larger than that of the liquid passing channel, the reaction tank is arranged in the reaction tank, and the blocking plate is arranged in the liquid passing channel. The reaction tank comprises a tank body mounted in the reaction tank and a plurality of layers of liquid passing holes formed in the tank body, filtering holes are formed between the adjacent layers of liquid passing holes in a staggered manner, and the adjacent filtering holes are connected through strip grooves.

The invention relates to a method for improving the recovery rate of titanium dioxide, belongs to the technical field of resource recovery and utilization, and solves the problem of low resource utilization rate caused by low recovery rate of the existing titanium dioxide recovery process. The method comprises the following steps: efficiently leaching W and V: mixing an industrial inactivated denitration catalyst with an alkaline solution, reacting, and removing supernate to obtain a solid; converting titanium dioxide into titanate: mixing the obtained solid with an alkaline solution, and reacting to obtain filter residues; converting the titanate into titanium dioxide: adding an organic acid solution into the obtained filter residue to obtain a solid-liquid mixture, transferring the solid-liquid mixture into a reactor for nucleation to obtain slurry, adding a flocculating agent into the slurry, crystallizing to obtain turbid liquid, separating, and roasting to obtain TiO2.

The 3D ink-jet printing binder UV ink is prepared from the following raw materials in percentage by weight: 20 to 60 percent of cationic monomer, 10 to 50 percent of acrylic monomer, 5 to 20 percent of acrylic resin, 1 to 20 percent of initiator and the balance of auxiliary agents. The cationic initiator introduced in the invention can further improve the reaction activity of the free radical initiator, improve the reaction degree of a free radical system, and reduce the residue of monomers in the system, thereby reducing the odor of the UV curing binder. And moreover, the use amount of printing ink in the printing process is reduced, the thickness of a printing material is increased, and the printing frequency of a formed product is reduced, so that the product strength is improved, and the problem that the product strength is reduced due to more adhesives and large gaps is solved.

This invention discloses a method for reducing the grindability index of raw coke. After the carbonization feed is completed, the heating furnace heat load is maintained, and steam or heavy oil is introduced into the furnace tubes. The heated steam or heavy oil is then sent to the carbonization tower. Simultaneously, the carbonization tower is restored to a slightly positive pressure within 30-60 minutes, and the carbonization reaction temperature of the material is maintained to continue the carbonization reaction. Then, the raw coke exiting the carbonization tower is sent to a carbonization furnace or brick kiln for calcination. This invention, based on the raw coke production process and the principles affecting the grindability index of raw coke, produces raw coke with an adjustable grindability index suitable for manufacturers, reducing the time spent by manufacturers in raw material selection.

The invention discloses a caramel process production method and application thereof, and relates to the technical field of food processing, and the caramel process production method comprises the following steps: step 1, taking a food-grade sugar raw material as a main carbohydrate source; step 2, adding a catalyst into the sugar raw material in the step 1, and pressurizing and heating to react to a proper degree; and step 3, preparing the reaction material liquid obtained in the step 2. According to the caramel production method provided by the invention, the caramel syrup suitable for baking or related reprocessing industries is finally obtained, and the caramel syrup is convenient to add and can directly replace or partially replace sugar in original ingredients; the effect is natural, and compared with the conventional pigment in the original market, the pigment is more uniform and has a color with baking characteristics; the bread baking device is simple in structure, wide in application range, capable of being used in more scenes such as surface coating and baking of formed bread, and more suitable for being applied to current semi-finished products or step-by-step processing scenes.

The utility model discloses a gas distributor for a reaction kettle and the reaction kettle. The gas distributor comprises a gas inlet main pipe and a plurality of sub-ring pipes, the central axes of the plurality of sub-ring pipes coincide, and the ring-shaped outer diameters of the sub-ring pipes are different; the sub-ring pipes are arranged in a layered mode, and the lower the sub-ring pipes are, the smaller the annular outer diameter of the sub-ring pipes is. Air holes are formed in the sub-ring pipes; the downward direction in the vertical direction is a first air outlet direction; on a vertical section passing through the central axis, a connecting line between pipe cores of the sub-ring pipes is a contour line of the gas distributor, and the tangential direction of the contour line where the pipe cores of the sub-ring pipes are located and the direction towards one side far away from the central axis are a second gas outlet direction; the air outlet direction of the air holes is between the first air outlet direction and the second air outlet direction. The reaction kettle comprises a gas distributor. The gas distributor is provided with the gas holes in different gas outlet directions, so that the gas distributor can better distribute gas, the reaction kettle provided with the gas distributor can improve the gas content, and the reaction kettle has better reaction efficiency and more sufficient reaction degree.

The invention provides a synthesis method of narrow-distribution phenolphthalein polyaryletherketone / sulfone, and belongs to the technical field of synthesis methods of polyaryletherketone / sulfone. The method comprises the following steps: adding phenolphthalein, an active double-halogenated aromatic hydrocarbon monomer, a salt-forming agent and a high-boiling-point proton-free strong polar solvent into a reaction kettle, starting stirring, raising the temperature under nitrogen purging, stopping nitrogen purging, opening a pressure reduction function, extracting air to stabilize the vacuum air pressure of a polymerization kettle to-98.5 to-93.5 kPa, maintaining a polymerization system to be slightly boiled, adjusting heat tracing of a rectifying tower, and carrying out heat tracing on the rectifying tower; the temperature of the tower top is maintained at 25-40 DEG C, the state is maintained for 0.4-0.7 h, a nitrogen switch is turned on, negative pressure pumping is stopped, after the normal pressure of the polymerization kettle is recovered, heating is carried out, a viscous polymer product is obtained, heating is stopped, and phenolphthalein-based polyaryletherketone / sulfone is obtained through aftertreatment. According to the method, under the condition that an entrainer is not used, the polyaryletherketone / sulfone with high molecular weight and narrow distribution is efficiently synthesized through cooperation of normal pressure and reduced pressure of a reaction kettle.

The invention belongs to the technical field of coatings, and discloses a light-cured epoxy-acrylic acid-polyurethane hybrid dispersion as well as a preparation method and application thereof. The light-cured epoxy-acrylic acid-polyurethane hybrid dispersion is prepared from the following raw materials: a hydrophilic chain extender, an acrylic monomer, an acrylate monomer, a vinyl monomer, epoxy resin, polyol, an isocyanate monomer, a bio-based material, a hydrophilic modifier, an acrylamide monomer, a neutralizer and an initiator. A paint film of a water-based light-cured bio-based paint prepared from the light-cured epoxy-acrylic acid-polyurethane hybrid dispersion has the characteristics of high flexibility, good chemical resistance, excellent adhesion to various substrates and the like.

The invention relates to the technical field of cation exchangers, in particular to a cation exchanger convenient to backwash and a using method thereof.The cation exchanger convenient to backwash comprises a filter layer, a top cover and a tank, the top of the tank is detachably connected with the top cover through bolts, the filter layer is arranged in the tank, and resin is arranged in the filter layer; a fourth channel communicated with the side wall of the tank body is arranged below the filter layer; a third channel is arranged at the bottom of the tank body, a tower-shaped pore plate cover is arranged at the top of the tank body, and the tower-shaped pore plate cover is fixed with the top of the inner cavity of the top cover; the first channel and the second channel penetrate through the top cover and then are communicated with the tower-shaped pore plate cover, the tower-shaped pore plate cover is used for guiding input water to be purified, the situation that the pressure of the input water is too large, and resin is damaged can be prevented, and the water to be purified can make uniform contact with different kinds of resin.

The invention provides a porous aerogel adsorption material as well as a preparation method and application thereof, and belongs to the technical field of energy materials. The preparation method comprises the following steps: mixing and drying a water-soluble lithium salt and a titanium source to obtain a nanoscale mixed material, and roasting the nanoscale mixed material to obtain a titanium-based ion sieve precursor; the preparation method comprises the following steps: mixing a titanium-based ion sieve precursor with a binder to form slurry, cross-linking in a cross-linking agent solution to form hydrogel, and freeze-drying to obtain the porous aerogel adsorption material. The titanium-based ion sieve precursor is prepared through wet mixing, drying and roasting, and the problems that raw materials are large in grain size and uneven in mixing, and the titanium-based ion sieve is low in purity can be solved; the adsorption selectivity of carboxyl and lithium in the binder is improved through electrostatic attraction; the cross-linking agent can improve the adsorption rate and reduce the surface brittleness of the material.

The invention discloses a synthesis device and a synthesis method of lithium sulfide. The synthesis device comprises a reactor, a heating mechanism, a gas supply mechanism, a feeding mechanism and a separation mechanism, the heating mechanism is used for heating the reactor; the gas supply mechanism is communicated with the lower part of the reactor and is used for supplying a gas material into the reactor; the feeding mechanism is arranged at the upper part of the reactor and is used for adding solid materials into the reactor; and the separation mechanism is communicated with the upper part of the reactor and is used for separating substances entering the separation mechanism along with gas flow after the solid and gas reactants in the reactor react so as to extract lithium sulfide. Gaseous reactants enter from the lower part of the reactor, solid reactants enter from the upper part of the reactor, and gas drives materials to form a fluidized state in the reactor, so that the gas reactants and the solid reactants are in full contact, full and uniform reaction is promoted, and continuous synthesis production can be realized.

The invention discloses a process for synthesizing methane chloride from PVA (polyvinyl alcohol) byproduct methyl acetate. The process comprises a catalytic reactor, a first rectifying tower, a second rectifying tower and the like. A PVA byproduct methyl acetate is used as a raw material, a methyl acetate hydrolysis endothermic reaction and an exothermic reaction for synthesizing methane chloride from methanol and hydrogen chloride gas are simultaneously completed in a reactor, a hydrolysis reaction product methanol and a synthesis reaction product water are mutually reaction raw materials, the consumption of the reaction products promotes chemical equilibrium to be carried out in a positive direction, and the reaction degree is more thorough. The problem that azeotrope formed by methyl acetate hydrogenation and methanol is difficult to separate can be avoided. The method not only has the characteristics of novelty, simple process, easiness in separation of reaction products, energy conservation, consumption reduction and the like, but also provides a new method and way for deep development and application of the PVA byproduct methyl acetate.

The invention discloses a method for extracting silicon resources through a low-temperature smelting method and application of the method, and relates to the technical field of inorganic oxide processing. Micro silicon powder and the like are used as raw materials, a small amount of surfactant is added to increase the dispersity of the raw materials and accelerate the reaction process, and the silicon resources in the raw materials are extracted through low-temperature smelting in an alkaline environment; and preparing the silicon dioxide aerogel by using a sol-gel method and normal-pressure drying. Low-temperature smelting is carried out at 300-550 DEG C, energy consumption is low, environmental pollution is small, calcination at the high temperature of 800 DEG C or above is not needed, a small amount of added water can be evaporated in the heating stage, and the method is fundamentally different from wet-method preparation. The invention opens up a new thought for exploring high-value utilization of industrial solid wastes.

The invention belongs to the technical field of preparation of non-ferrous metal materials, and particularly relates to a medium-frequency smelting method for an extrusion ingot for reducing black lines of anodized aluminum. The method comprises the following steps: mixing various components of an aluminum alloy, then smelting at 720-750°C, placing the smelted aluminum alloy in a medium-frequency furnace for refining, wherein the refining comprises refining agent refining and argon refining; the refining agent refining comprises the following steps: adding a refining agent to the smelted aluminum alloy, wherein the medium gas is argon gas, heating the medium-frequency furnace for a period of time, closing the medium-frequency furnace, and standing for a total of at least 10 minutes, and then slagging; after the argon refining is completed, standing for at least 5 minutes, and then slagging; the method can reduce the hydrogen content, improve the effect of the aluminum alloy after anodizing treatment, and especially reduce the phenomenon of black lines of anodized aluminum.