75results about How to "Low reaction temperature" patented technology

This invention relates to the field of catalyst technology, and in particular to a formaldehyde reforming hydrogen production catalyst, its preparation method, and its application. The formaldehyde reforming hydrogen production catalyst of this invention comprises a Cu-O-Zn solid solution and mordenite zeolite; the mass ratio of the Cu-O-Zn solid solution to the mordenite zeolite is 50-100:100. This formaldehyde reforming hydrogen production catalyst of this invention has advantages such as low reaction temperature, high formaldehyde conversion rate, high H2 selectivity, low CO selectivity, good stability, and long service life, and has broad market application prospects. This catalyst is not only suitable for formaldehyde systems, but can also be applied to other organic aldehydes such as acetaldehyde, propionaldehyde, butyraldehyde, and benzaldehyde for reforming to produce hydrogen, demonstrating high versatility and practicality in the research field of catalytic reforming of organic aldehydes to produce clean energy hydrogen. The preparation method of this invention is simple, the raw materials are readily available, and it is easy to scale up for industrial production.

The invention relates to a preparation method of a catalyst for preparing 1-hexyl methyl acetate by addition of n-heptene and acetic acid, which comprises the following steps: impregnating a carrier sulfonic acid group strong acid resin into a heteropoly acid solution, stirring at 20-50 DEG C for 8-24 hours, and controlling the mass ratio of the sulfonic acid group strong acid resin to the heteropoly acid solution to be (10: 1)-(1: 3); and after stirring, filtering, and drying a solid obtained after filtering at 80-140 DEG C to obtain a finished product. The invention also provides a synthetic method for synthesizing 1-hexyl methyl acetate by using the catalyst. The supported solid acid catalyst can be recycled from reaction slurry through simple liquid-solid separation means such as filtration and centrifugation, and good product selectivity can be obtained.

The invention relates to the field of organic pigments, and discloses a preparation method and application of nano organic pigments with different crystal forms. The preparation method comprises the following steps: 1) dissolving an organic pigment crude product in a good solvent, and adding inorganic salt for activation; 2) dropwise adding a poor solvent at a gradient rate, adding a crystal form guiding agent, and inducing formation of a crystal nucleus; wherein the alpha crystal form directing agent is magnesium stearate; the beta crystal form directing agent is dibutyl phthalate; the gamma crystal form directing agent is polyethylene glycol; the initial gradient rate is 0.5-1 mL / min, and the gradient rate is increased by 0.2-0.3 mL / min every 8-12 min; 3) ultrasonic treatment; 4) cooling, and adding a surface modifier for surface modification; according to the preparation method, the nanometer organic pigment with the target crystal form can be accurately obtained through process regulation and control, the nanometer organic pigment is uniform in particle size distribution, good in dispersity, good in heat-resistant stability and high in color and luster strength, and the nanometer organic pigment has the advantages of being good in flocculation-resistant stability and weather resistance after a coating is formed.

This invention relates to the field of metal surface strengthening technology, specifically a method for in-situ generation of TiC-TiN ceramic materials using a titanium-containing substrate and an atmosphere-assisted high-energy beam. This method utilizes the titanium-containing substrate itself as a titanium source. Under a specific atmosphere, high-energy beam irradiation causes the Ti element in the substrate to react in-situ with C and N elements in the atmosphere, generating a TiC and / or TiN ceramic strengthening layer on the substrate surface. Specifically, the method includes: pretreating the titanium-containing substrate; placing it in a reaction chamber and introducing an auxiliary gas containing C and / or N; scanning and irradiating the substrate surface with a high-energy beam, controlling process parameters to allow Ti to react with C and N, generating a 0.5-1.2 mm thick metallurgically bonded strengthening layer. The advantages are: this invention eliminates the need for additional titanium powder or carbon powder, resulting in a simple and low-cost process; the strengthened layer exhibits high bonding strength with the substrate with no risk of detachment; and it significantly improves the surface hardness, wear resistance, and corrosion resistance of the substrate, making it widely applicable in military, aerospace, and marine equipment fields.

The present application relates to a kind of preparation method of titanium carbide fiber, belong to metallurgy and hard alloy preparation technical field.The present application uses titanium hydride as titanium source, carbon nanotube as carbon source, using molten salt method, in the tube furnace of argon protection, 700~900 ℃ reaction 3~5h, prepared fibrous titanium carbide, product is removed after washing other impurities and obtains high-purity titanium carbide fiber.Sodium chloride and potassium chloride binary salt are used as molten salt medium, which can effectively reduce the reaction temperature and reduce energy consumption.The preparation method of fibrous titanium carbide proposed in the present application has the advantages of low cost, simple process, low reaction temperature, short reaction time, etc.The prepared titanium carbide powder has high crystallinity and uniform particle size distribution.The salt can also be recycled and reused, reducing the synthesis cost and facilitating industrial production.

This invention provides the application of a mixture of methylstyrene with high para-isomer content in the preparation of polystyrene substitute copolymers, belonging to the field of polymer material synthesis technology. This invention is the first to directly utilize a low-cost mixture of methylstyrene isomers to replace high-purity styrene. Through a "boiling-condensation" cycle in the fluidized bed polymerization process, efficient and constant-temperature heat dissipation is achieved, effectively overcoming the heat transfer difficulties and temperature runaway risks of traditional bulk polymerization. This facilitates control of the polymerization mechanism and yields random copolymers with a narrow molecular weight distribution and mechanical properties comparable to general-purpose polystyrene. This method is simple and controllable, significantly reduces raw material costs, and combines economic benefits with environmental value. The resulting copolymers can be used in general plastics, packaging materials, and other fields.

The invention discloses a multi-stage plasma treatment device and method for enhancing removal of chlorinated organic compounds in factory water of a waterworks. The multi-stage plasma treatment device comprises a diameter change reaction container, a bearing shaft fixing and transmission device, a bearing shaft, a working electrode and turbulent flow fan blades. The diameter-variable reaction container is a cylinder of which the radius is gradually reduced, and sequentially comprises a water inlet, a turbulent flow section, three treatment sections and a water outlet; the inner side of the bearing shaft fixing and transmission device is fixed with the bearing shaft and drives the bearing shaft to rotate, and the outer side of the bearing shaft fixing and transmission device is fixed with the reaction container; a circuit is arranged in the bearing shaft; a working electrode is a needle-shaped tungsten electrode, each treatment section is provided with three annular belts, each annular belt comprises 12 electrodes, and the interval between every two adjacent electrodes is 30 degrees; the number of the turbulent flow fan blades is 12, and the turbulent flow fan blades are distributed at 30 degrees. According to the invention, to-be-treated water containing chlorinated organic matters and gas (Ar / O2 mixed gas) are pretreated into a gas-liquid mixture, a high-pressure reaction place is formed by virtue of a variable-diameter container, and high-temperature and high-energy plasmas are generated in a rotating electrode pulse type discharge manner, so that the chlorinated organic matters are efficiently pyrolyzed.

The invention relates to amino acid modified red-mud-based magnesium-iron-aluminum hydrotalcite and a preparation method and application thereof.The preparation method comprises the following steps that red mud and inorganic acid are mixed and heated and leached under the stirring condition, an obtained leaching product is subjected to solid-liquid separation, and upper-layer acid leaching liquid containing iron and aluminum and residues are obtained; mixing the obtained upper-layer acid leaching solution with amino acid to obtain a mixed solution; adding magnesium salt into the obtained mixed solution, and carrying out coprecipitation reaction to obtain turbid liquid; and centrifuging, washing and drying the obtained turbid liquid to obtain the amino acid modified red mud-based magnesium-iron-aluminum hydrotalcite. Iron and aluminum elements in the red mud are directly extracted, the cost is reduced, and meanwhile the performance and the additional value of the hydrotalcite product prepared from the red mud are remarkably improved; amino acid molecules are introduced, the crystallinity, the specific surface area and the adsorption capacity of the magnesium-iron-aluminum hydrotalcite are improved, a co-precipitation reaction is adopted, the reaction temperature is low, the reaction time is short, and the prepared amino acid modified red-mud-based magnesium-iron-aluminum hydrotalcite can be used for treating phosphorus-containing wastewater.

The present application relates to a kind of biological gamma-butyrolactone and its production method, the production method of biological gamma-butyrolactone of the present application includes the following steps: preparation biological succinic acid solution;The obtained biological succinic acid solution and hydrogen continuously enter the fixed bed containing nickel copper catalyst and carry out hydrogenation reaction, obtain crude product;The obtained crude product enters separation column and is separated and purified, obtain biological gamma-butyrolactone;Nickel loading in the nickel copper catalyst is 30wt%~60wt%, copper loading is 1wt%~5wt%, the content of hydrophobic compound is 0.01wt%~0.2wt%.The present application is prepared by 5wt%~30wt% biological 1,4-butanedioic acid dilute solution continuously into fixed bed hydrogenation reactor, and biological gamma-butyrolactone liquid is prepared, continuously enters rectification separation column and is separated, and biological gamma-butyrolactone product with purity ≥99.99% can be prepared, and the rest is impurity;The impurity includes tetrahydrofuran and 1,4-butanediol;The content of tetrahydrofuran is ≤0.004%;The content of 1,4-butanediol is ≤0.005%.

The invention relates to the technical field of bio-based softening agents, in particular to a synthesis method of a novel bio-based non-silicon softening agent, which comprises the following steps: step 1, adding 2-20 parts of epoxidized soybean oil and 0.8-1.5 parts of amine substances into a reaction kettle, heating and stirring to carry out amination reaction, reacting for 4-8 hours at the temperature of 75-85 DEG C, and cooling after the reaction is finished; and step 2, adding the product in the step 1 into an emulsification kettle, adding acetic acid accounting for 5% of the total amount of the product in the step 1, uniformly stirring, then adding deionized water accounting for 4 times of the total amount of the product in the step 1, and fully stirring to obtain a non-silicon softener emulsion. The novel bio-based non-silicon softener provided by the invention has a low reaction temperature, the reaction can be completed at about 80 DEG C, and the energy consumption is obviously reduced; the novel bio-based non-silicon softening agent provided by the invention is low in reaction temperature, does not generate low boiling points in the reaction process, and is good in environmental protection performance due to the fact that the main raw material is the epoxidized soybean oil.

This invention relates to the field of reinforcement materials technology, specifically to reactive low-temperature reinforcement materials for mining, their preparation methods, and applications. The reactive low-temperature reinforcement material for mining comprises component A and component B. Component A consists of polyester polyol, polyether polyol, silane coupling agent, and catalyst; component B consists of prepolymer and additives. The prepolymer is obtained by reacting polyether polyol b with polymethylene polyphenyl polyisocyanate. Polyether polyol b has a functionality of 3.1 and a hydroxyl value of 207 mg KOH / g, and is a polyether polyol polymerized with propylene oxide using maltitol, trimethylolpropane, hydroquinone, and triethylene glycol as initiators. The material prepared by this invention is primarily reactive in structure and flame-retardant, avoiding the impact of adding large amounts of additive flame retardants on material strength. The resulting material exhibits high compressive strength, low internal heat of reaction, and good flame-retardant properties.

The utility model relates to the technical field of centrifugal evaporation, and particularly discloses a low-temperature-based high-speed centrifugal evaporation device which comprises a shell, a motor is embedded in the surface of the shell, and a cavity is embedded in the surface of the shell; a containing cavity is formed in the cavity, an output shaft of the motor is connected with the bottom face of the containing cavity, a cover is rotationally installed on the surface of the shell, and a sealing cover is installed at the bottom of the cover. The shell is provided with a heating structure, and the heating structure is characterized in that a heating block is embedded in the shell, and a pipeline I is embedded in the surface of the cover. According to the low-temperature high-speed centrifugal evaporation device, the heating structure is arranged, the placing cavity is heated, then the reaction rate of a reagent is increased, the vacuum pump vacuumizes the interior of the placing cavity through the second pipeline, a negative pressure environment is formed in the placing cavity, the boiling point of the reagent is reduced, the evaporation process is further accelerated, the evaporation time is shortened, and the working efficiency is remarkably improved.

The invention relates to the technical field of pesticides and herbicides, and discloses a preparation method of halauxifen-methyl as shown in a formula (I). The preparation process of the halauxifen-methyl and the key intermediate of the halauxifen-methyl provided based on the new intermediate compound has the obvious advantages of mild reaction conditions, low cost of raw materials and reagents, less impurity generation, high reaction yield, high product content and the like.

This invention discloses an alkane hydroisomerization catalyst, its preparation method, and its application. The catalyst comprises Pt / Al₂O₃, Pt-M / C₃N₄, and a molecular sieve, where M is a metal promoter. In Pt / Al₂O₃, Pt exists in the form of nanoclusters, while in Pt-M / C₃N₄, Pt exists in the form of single atoms. When used in alkane isomerization reactions, this catalyst significantly improves the utilization efficiency of Pt metal to obtain the optimal isomer yield and reduces the reaction temperature required to achieve the optimal yield.

The invention belongs to the technical field of catalysts, and particularly relates to a cobalt-manganese composite metal oxide catalyst and a preparation method and application thereof. A water mixed solution of a cobalt source, a manganese source, ammonium fluoride and a precipitant is subjected to a hydrothermal reaction, a reaction product is washed, dried and calcined, and the required cobalt-manganese composite metal oxide catalyst is obtained. The catalyst is used for catalyzing acrylic acid and 2-[(tetrahydrofurfuryl) oxy] ethanol to synthesize ethoxylated tetrahydrofurfuryl alcohol acrylate. The catalyst is good in catalytic activity, narrow in product composition distribution, high in selectivity and small in byproduct generation amount, and further has the advantages of being easy and convenient to separate and recycle, high in repeated utilization rate, low in corrosion to equipment, free of requirements for equipment materials, environmentally friendly, high in stability and the like.

The invention provides a method for catalytic continuous synthesis of aryl methyl ether, and belongs to the field of aryl methyl ether. The method for catalytically and continuously synthesizing the aryl methyl ether is carried out in a manner of combining continuous reaction and continuous rectification. According to the method for catalytically and continuously synthesizing the aryl methyl ether, the continuous production of the aryl methyl ether can be realized while dimethyl sulfate is not adopted and a large amount of high-toxicity wastewater and solid wastes are prevented from being generated in the production process, and the continuous production of the aryl methyl ether is mild in reaction condition, low in requirement on production equipment, small in production risk and high in production efficiency; the yield of the aryl methyl ether prepared through large-scale production is high, and large-scale industrial production is facilitated.

The invention discloses a CoCu-based bimetallic oxide catalyst, a preparation method of the CoCu-based bimetallic oxide catalyst and a preparation method of 2, 5-furandicarboxylic acid. The preparation method of the catalyst comprises the following steps: mixing a Co precursor, a Cu precursor, a heterocyclic dicarboxylic acid compound, a heterocyclic amine compound containing more than two nitrogen atoms and a carbon material in a solvent, reacting, and roasting to obtain the CoCu-based bimetallic oxide catalyst. The preparation method of the 2, 5-furandicarboxylic acid comprises the following step: carrying out catalytic oxidation reaction on 5-hydroxymethylfurfural in the presence of the catalyst, an oxidant and water to obtain the 2, 5-furandicarboxylic acid. The catalyst adopts the non-noble metal, can efficiently catalyze and oxidize the 5-hydroxymethylfurfural to prepare the 2, 5-furandicarboxylic acid, and has the advantages of mild reaction conditions, less non-noble metal consumption, high conversion rate of the 5-hydroxymethylfurfural, high yield of the 2, 5-furandicarboxylic acid and the like.

This invention provides a method for preparing lithium iron phosphate from hydroxyferric phosphate and lithium iron phosphate electrode material. Ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, and ammonia are added to the ferrous sulfate solution to form a mixed slurry. The mixed slurry is kept at room temperature for a period of time, then washed with water and filtered to form hydroxyferric phosphate precursors with different iron-phosphorus ratios. These precursors are then flash-dried and sintered at high temperature to obtain hydroxyferric phosphate precursors with different iron-phosphorus ratios and specific surface areas. The hydroxyferric phosphate precursors are pulverized and mixed to obtain the finished hydroxyferric phosphate product. High-iron-phosphorus ratio hydroxyferric phosphate and low-iron-phosphorus ratio hydroxyferric phosphate are mixed in a certain proportion and then formulated with lithium phosphate, lithium iron phosphate, and electrode material in a specific ratio, with the addition of a carbon source and additives to form a mixture. The mixture is then subjected to ball milling, sand milling, spray drying, sintering, pulverizing, sieving, batching, and packaging processes to obtain the finished lithium iron phosphate product.

This invention provides a method for preparing a diesel hydrocracking catalyst, comprising the following steps: mixing and kneading a Y-type molecular sieve loaded with a hydrogenation active metal and alumina loaded with a hydrogenation active metal to obtain the final hydrocracking catalyst; wherein the average pore size of the alumina is larger than the average pore size of the Y-type molecular sieve. The catalyst prepared by this method can improve the diffusion performance of macromolecules in low-quality diesel fuel within the molecular sieve channels, enhance catalytic activity, reduce reaction temperature, decrease energy consumption, and extend the operating cycle of the equipment.

The present application provides a colloid bitumen dispersant and its preparation method and application, and belongs to the technical field of oil field exploitation. It comprises the following components: dispersant mother liquor containing hyperbranched complex 60-100 parts, solvent 20-30 parts, sodium dodecyl benzene sulfonate 2-5 parts, alpha-alkyl sodium sulfonate 1-3 parts, ethylenediaminetetraacetic acid disodium 2-5 parts, low carbon alcohol 5-15 parts, antioxidant 0.5-2 parts. Through the design of complex structure, the construction of green solvent system and the innovative synthesis process, the present application realizes the synchronous collapse of colloid hydrogen bond network and asphaltene pi-pi accumulation, significantly reduces the dispersant dosage and preparation energy consumption, and has broad application prospect.

The invention discloses a coal gangue microwave-chemical synergistic activation method and activated coal gangue, the coal gangue microwave-chemical synergistic activation method comprises the following steps: (1) crushing coal gangue to obtain a crushed product; (2) mixing the crushed product with a composite activator, and performing microwave treatment to obtain an activated product; the composite activating agent comprises waste alkali liquor, fly ash aluminum extraction residues and water glass; and (3) drying, cooling and grinding the activated product to obtain the activated coal gangue. The microwave-chemical synergistic activation method for the coal gangue is high in activation efficiency, efficient destruction of crystal lattices of coal gangue minerals is achieved through the synergistic effect of microwaves and the composite activating agent, the activation time is shortened, the silicon-aluminum dissolution rate is increased, the silicon dissolution rate reaches 80% or above, the aluminum dissolution rate reaches 70% or above, the problem that single chemical activation is low in efficiency is solved, and the method is suitable for industrial production. And the obtained activated coal gangue product has high activity.

The application provides a method for preparing lithium iron phosphate from iron hydroxyl phosphate and ferrous oxalate. The ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution and ammonia water are sequentially added to the solution to form a mixed slurry. The mixed slurry is heated and kept warm, and then washed with water and filtered under pressure to form an iron hydroxyl phosphate precursor with different iron and phosphorus ratios. The iron hydroxyl phosphate precursor is dried by flash evaporation and sintered at high temperature and then crushed to obtain an iron hydroxyl phosphate precursor with different iron and phosphorus ratios and different specific surface areas. The iron hydroxyl phosphate precursor is crushed and mixed to obtain an iron hydroxyl phosphate product. The high-iron and low-iron ratio iron hydroxyl phosphate is mixed with ferrous oxalate, lithium phosphate, lithium carbonate and ammonium dihydrogen phosphate in a certain proportion, and a carbon source and an additive are added to form a mixture. The mixture is subjected to a series of processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging to obtain a lithium iron phosphate product.

This invention discloses a method for desulfurization by reacting hydrogen sulfide and sulfur dioxide in brine. Hydrogen sulfide and sulfur dioxide are introduced into a brine solution, and a liquid-phase Claus reaction is accelerated using a stirring paddle and steam to achieve rapid sulfur preparation and separation. Using the process method and apparatus of this invention, the sulfur dioxide and hydrogen sulfide gases are vigorously stirred in the brine solution by a bladed stirring paddle, which not only increases the contact area and reaction efficiency between the gas and liquid phases, but also solves the problem of difficult separation of sulfur suspension due to the salting-out effect. Furthermore, the process flow of this invention is simple and easy to operate, and the brine in the sulfur solution can be recycled after separation, reducing operating costs.

The invention belongs to the technical field of PET (polyethylene terephthalate) depolymerization catalysts, and relates to a method for generating BHET (butylated hydroxytoluene) by depolymerization based on a DBU-SiO2 catalyst, which comprises the following steps: adding waste PET and ethylene glycol into a depolymerization kettle for alcoholysis depolymerization reaction under the catalysis of an organic-inorganic hybrid nitrogen heterocyclic organic alkali loaded porous silica gel catalyst DBU-SiO2 to obtain a BHET monomer; the preparation process of the DBU-SiO2 comprises the following steps: adding silica gel into ethanol, stirring, adding 1, 8-diazacyclo [5.4. 0] undec-7-ene, carrying out heating reflux, and sequentially filtering, washing and drying to obtain the DBU-SiO2; the conversion rate of the PET polyester is 87.49 to 95.11 percent, and the yield of the BHET monomer is 76.84 to 80.03 percent. According to the method disclosed by the invention, the waste PET is depolymerized by adopting the DBU-SiO2 catalyst, so that the PET conversion rate and the BHET yield are remarkably improved.

The invention belongs to the field of powder coatings, and particularly provides a flame-retardant insulating powder coating as well as a preparation method and application thereof.The flame-retardant insulating powder coating is prepared from the following raw materials in parts by mass through mixing treatment: 50-70 parts of epoxy resin, 10-20 parts of a dicyandiamide-aluminum hydroxide complex, 1-2 parts of a phenolic aldehyde curing agent, 0.5-1 part of a curing accelerator and 2-5 parts of auxiliaries; the dicyandiamide-aluminum hydroxide complex is obtained by carrying out grafting reaction on amino-modified aluminum hydroxide, polyether amine and dicyandiamide. The dicyandiamide-aluminum hydroxide complex prepared in the invention can reduce dicyandiamide curing promotion reaction temperature and improve compatibility of dicyandiamide and a coating inorganic phase with epoxy resin.

The utility model provides a kind of chlorination furnace and nickel-iron alloy separation equipment.Chlorination furnace includes furnace body, air inlet, first cooling jacket, lifting mechanism and bottom disc.Furnace body has accommodating cavity inside.Air inlet is communicated with furnace body.First cooling jacket is located outside furnace body.Bottom disc is located at the bottom opening of furnace body and is connected with lifting mechanism, and it forms airtight cooperation with bottom opening to support the material in furnace body, or it separates from bottom opening to realize feeding and discharging of furnace body.In the above-mentioned chlorination furnace, the reaction temperature of furnace body is reduced by first cooling jacket, and the chlorides generated during the reaction process are deposited on the inner wall due to the effect of cooling jacket, and when the deposit reaches a certain thickness, the construction of the furnace insulation layer is realized.Under the condition of lower temperature, the reaction speed of chlorine and steel is slow.Therefore, the requirement for corrosion resistance of steel is reduced, and ordinary boiler steel can be used as the material of furnace body, reducing the production cost of equipment.

The utility model relates to the technical field of sampling equipment, in particular to cooling sampling equipment for chlorantraniliprole production, which comprises a cooling box, a motor is fixedly mounted in the middle of the upper surface of the cooling box, and a first stirring blade is movably mounted in the middle of the top surface in the cooling box through a bearing. The output end of the motor penetrates through the cooling box to be connected with the end of the first stirring blade, a cooling pipe is installed in the cooling box, the two ends of the cooling pipe penetrate through the cooling box to extend out, and a micro water pump is fixedly installed at the end, penetrating through the cooling box to extend out, of the cooling pipe. A cooling cylinder is fixedly mounted at the other end, penetrating through the cooling box and extending outwards, of the cooling pipe, a sample discharging pipe is fixedly arranged in the middle of the lower surface of the cooling cylinder, a control valve is fixedly mounted in the middle of the outer surface of the sample discharging pipe, and a sample storage pipe is fixedly mounted at the other end of the sample discharging pipe. According to the chlorantraniliprole collecting device, the reaction temperature of a chlorantraniliprole collecting sample can be reduced, and the detection accuracy is further guaranteed.

The application discloses a method for removing copper from sodium antimonate at low temperature and at high speed, and the method comprises the following steps: under the conditions of negative pressure, microwave heating and stirring, removing copper from sodium antimonate, a water solvent and a composite copper removal reagent; after the reaction is completed, solid-liquid separation is performed; the obtained liquid part is a reaction mother liquor, and the obtained solid part is copper-removed sodium antimonate; and the copper removal substance in the composite copper removal reagent is an ammonium source substance. The method has the advantages of low reaction temperature, short reaction time, fast reaction speed, energy saving and environmental protection, good copper removal effect, high product yield, and the like. The obtained sodium antimonate product can meet the requirements of various glass fining agents and decoloring agents; the method reduces the requirement for copper in raw materials in the preparation of sodium antimonate, expands the source of the sodium antimonate raw material, reduces the cost of the raw material, and thus reduces the production cost of the sodium antimonate product.

The invention relates to the technical field of polymer degradation, and discloses a degradation method of a cross-linked high-molecular material, which comprises the following steps: adding at least one of dichloroethane, dichloromethane and chloroform and an amphoteric permeation carrier into crushed cross-linked high-molecular material for swelling treatment, and adding anhydrous ferric trichloride for constant-temperature permeation treatment; then adding benzaldehyde and at least one of triphenylphosphine and polyethylene glycol dimethyl ether for in-situ complexing activation to obtain mother liquor to be reacted; carrying out degradation reaction on the mother liquor to be reacted under the condition that the temperature is 85 to 120 DEG C and the pressure is 0.5 to 1.5 MPa and is in periodic gradient fluctuation; and finally, adding a quenching agent into the degradation liquid to terminate the reaction, and separating and purifying to obtain the oligomer. Through the synergistic effect of swelling permeation, in-situ activation and pressure fluctuation physical disturbance, embedding and efficient reaction of a catalytic active center in a three-dimensional network are achieved, and an oligomer product with narrow molecular weight distribution and complete active end group retention is obtained.