92 results about "Aluminium salts" patented technology

This invention provides a soil stabilizer and its construction method, belonging to the field of road construction. The soil stabilizer comprises a water-reducing and densifying powder, a hydration-resistant stabilizing liquid agent, and a cementing material. By mass fraction, the water-reducing and densifying powder comprises 20-30% zeolite powder, 5-8% aluminum sulfate, 3-7% lithium carbonate, 2-4% silica fume, and the balance metakaolin. By mass fraction, the hydration-resistant stabilizing liquid agent comprises 5-8% polyamide resin, 3-5% alkyltrimethylammonium chloride, 2-4% organosilane coupling agent, 1-2% sodium lignosulfonate, and the balance liquid polyethylene glycol. The stabilizer of this invention consists of three main functional modules: the water-reducing and densifying powder, the hydration-resistant stabilizing liquid agent, and the cementing material. These components work synergistically to achieve efficient stabilization of silty soil.

The application provides a modified fluorogypsum-based steel structure fireproof coating and a preparation method thereof, and comprises the following steps: 1) mixing and treating carbide slag and fluorogypsum raw materials to obtain a first intermediate; 2) microwave heating treatment of the first intermediate, wherein the microwave heating treatment process comprises primary heating treatment and secondary heating treatment, and a second intermediate is obtained; 3) secondary mixing treatment of the second intermediate and an excitation agent to obtain modified fluorogypsum; wherein the microwave power of the microwave heating treatment is 300W-500W, and the microwave frequency is 2450MHz-2500MHz; the excitation agent comprises at least two of a sulfate, a silicate and a water-soluble aluminum salt. The method eliminates fluorine ions and acidic impurities in fluorogypsum waste residues which are harmful to the human body and the environment, excites the hydration activity of the fluorine ions and the acidic impurities, improves the high-temperature resistance of the fluorine ions and the acidic impurities, and further makes the fluorine ions and the acidic impurities meet the performance requirements of the modified fluorogypsum-based steel structure fireproof coating, and increases the fluorogypsum waste residue consumption path.

The application discloses a layered silicate gangue inhibitor for fine-grained copper ore flotation and a preparation method thereof. The inhibitor is composed of the following components: modified polysaccharide organic polymer 15-30%, sodium hexametaphosphate 10-30%, acrylic acid 7-15%, acrylamide 1-5%, ammonium persulfate 2-5%, hydroxyethylidene diphosphonic acid 5-15%, aluminum sulfate 2-5%, and deionized water in a residual amount. The preparation method comprises the following steps: mixing modified polysaccharide and deionized water according to a mass ratio of 1:1-1:2 to prepare solution A; polymerizing acrylic acid and acrylamide to prepare solution B; mixing solution A and solution B, and adding a formula amount of sodium hexametaphosphate to react; then adding a formula amount of hydroxyethylidene diphosphonic acid and a formula amount of aluminum sulfate to carry out complex adjustment; and finally, aging, filtering and obtaining the product. The inhibitor has a strong selective inhibiting effect on talc, phlogopite and other layered silicate gangues, can significantly improve the copper concentrate grade and recovery rate, has a small dosage, is non-toxic and environment-friendly, and can be biodegraded.

This invention relates to a rapid-setting high-strength concrete and its preparation method. The rapid-setting high-strength concrete comprises the following raw materials in parts by weight: 100-200 parts cement, 80-100 parts coarse aggregate, 40-60 parts fine aggregate, 10-20 parts rubber powder, 20-30 parts modified straw-based carbon powder, 0.3-0.5 parts coupling agent, and 0.6-0.8 parts water-reducing agent. The modified straw-based carbon powder is obtained by first adding straw powder to an activation solution containing aluminum sulfate, carboxymethyl starch, and triethanolamine, followed by activation, ball milling, and freeze-drying to obtain a precursor. The precursor is then mixed with flake aluminum powder and heated under an inert atmosphere to obtain the final product. The mass fraction of aluminum sulfate is 5-10%, the mass fraction of carboxymethyl starch is 5-10%, and the mass fraction of triethanolamine is 3-5%. This invention improves the rapid setting effect, compressive strength, flexural strength, and crack resistance of concrete by incorporating modified straw-based carbon powder into the concrete components. This is of great significance for improving the overall performance of concrete and developing infrastructure construction.

The application relates to a ternary metal nanocatalyst and a preparation method and application thereof, and relates to the field of catalytic chemistry. The specific steps of the method are as follows: soluble iron salt, soluble nickel salt and soluble aluminum salt are added into deionized water, and a carbon carrier is added as a substrate and is subjected to ultrasonic treatment. An alkaline solution containing sodium carbonate and sodium hydroxide is added dropwise into the prepared metal salt solution under vigorous stirring. The metal salt suspension is aged; the obtained solution is centrifuged, the solid is collected and vacuum dried and ground. The activated carbon loaded iron-nickel-aluminum ternary metal nanocatalyst can realize the complementary advantages among multiple components, and the synergistic mechanism makes the iron-nickel-aluminum catalyst exhibit better ammonia production rate and selectivity than single metal components in a neutral environment, and can be used for electrocatalytic nitrate reduction to prepare ammonia.

This invention discloses a rapid-hardening, high-toughness shotcrete and its spraying construction method, belonging to the field of concrete material technology. It employs a technical route of multi-component synergistic rapid-hardening – modified hybrid fiber toughening – three-stage synergistic expansion – three-phase distribution spraying method. The shotcrete material consists of powder, graded fine aggregate, polymer, high-performance liquid accelerator, and water. The graded fine aggregate forms a riprap skeleton; the high-belite aluminum sulfate cement and silicate cement compound lay the foundation for rapid hardening; the modified hybrid fibers construct a three-dimensional reinforcing network to achieve high toughness and crack resistance; the multi-component composite expansion agent compensates for shrinkage throughout all ages; and the micro-nano active admixtures and polymer optimize interfacial bonding performance. It is complemented by high-pressure airflow cleaning / nano-silicon ion impregnation of the substrate and a three-phase distribution spraying method of rapid-hardening cement paste – graded fine aggregate – liquid accelerator. The concrete of this invention combines rapid hardening, high strength, and high toughness and crack resistance, shortening response time and improving construction efficiency.

The present solution provides a hybrid coagulant based on aluminum-iron silicate, where the molar concentration of silicon is in the range of 0.1 to 0.5 mol∙l-1, the molar ratio of the sum of aluminum and iron to silicon is in the range of 1:0.5 to 1:1.5, the molar ratio of aluminum to iron is in the range of 0.5:1 to 5:1, and a method of its preparation by mixing hydrated aluminum sulfate, hydrated iron sulfate and an acidic solution of silicon dioxide.

The application discloses a dehydrogenation catalyst and a synthesis method and application thereof. The synthesis method of the catalyst comprises the following steps: (1) mixing soluble copper salt, soluble zinc salt and soluble aluminum salt with dichloromethane and ethanol to obtain a mixed solution containing copper, zinc and aluminum, and then adding polylactic acid and stirring to obtain a spinning solution; (2) using a coaxial electrostatic spinning nozzle to electrostatically spin the spinning solution obtained in the step (1) and collecting a solid; (3) placing the solid obtained in the step (2) in an ethanol solution of trimesic acid to perform a reaction, and then washing and drying the catalyst precursor after the reaction is completed; and (4) calcining and post-treating the catalyst precursor obtained in the step (3) to obtain the catalyst. The catalyst obtained by the method has high conversion rate and selectivity in the reaction of dehydrogenating 1,4-butanediol to prepare gamma-butyrolactone.

An electrolyte composition including an aluminum salt, an ionic liquid, and a phthalocyanine coordination compound is provided. The anion of the aluminum salt is F−, Cl−, Br−, I−, BF4−, PF6−, [(CF3SO2)2N]−, CF3SO3−, NO3−, CH3CO2−, SO42−, C2O42−, or [B(C2O4)2]−. The ionic liquid has a structure as shown in formula (I) in the specification. The phthalocyanine coordination compound contains a divalent metal ion. In the electrolyte composition, the weight of the aluminum salt is greater than that of the ionic liquid, and the weight of the ionic liquid is greater than that of the phthalocyanine coordination compound. An aluminum battery containing the electrolyte composition is also provided.

The application discloses a kind of sanitary facing layer water guide type spunlace material and preparation method thereof, comprising the following steps: step 1: (1) different molecular weight polyethylene glycol diacrylate is copolymerized with monomer, wet spinning is carried out, and zinc stearate aqueous dispersion is used to treat, to obtain superabsorbent fiber A, B;(2) polyethylene glycol diacrylate is copolymerized with monomer, modified cellulose fiber is added, wet spinning is carried out, and aluminum sulfate aqueous solution treatment, zinc stearate aqueous dispersion treatment are sequentially used, to obtain superabsorbent fiber C;Step 2: superabsorbent fiber A, superabsorbent fiber B, superabsorbent fiber C and fiber are respectively prepared into composite viscose fiber layer A, composite bamboo fiber layer B, composite bamboo fiber layer C;Hydrophilic PP fiber layer is laminated, spunlace treatment is carried out, dehydration is carried out, and drying treatment is carried out, to obtain water guide type spunlace material.The product of the application has higher moisture absorption capacity and anti-back seepage capacity.

The application relates to the technical field of Beta molecular sieve preparation, and discloses a method for rapidly preparing nano Beta molecular sieve by using a microwave synthesis method, which comprises the following steps: selecting appropriate silicon sources (such as silicon dioxide, white carbon black and the like) and aluminum sources (such as sodium metaaluminate, aluminum sulfate and the like), adding a template agent (such as tetraethylammonium hydroxide), an alkali source (such as sodium hydroxide) and deionized water, uniformly mixing and stirring according to a specific molar ratio to obtain an initial gel; then crystallizing the gel, and the crystallization can be carried out by using a conventional hydrothermal method or a microwave heating method; and after the crystallization is completed, the product is subjected to post-treatment such as filtering, washing, drying and high-temperature calcination, and finally, the Beta molecular sieve product is obtained. The method for rapidly preparing nano Beta molecular sieve by using the microwave synthesis method simplifies the synthesis steps, significantly shortens the crystallization time, improves the production efficiency, effectively controls the particle size of the nano Beta molecular sieve, and obtains the nano-level product with smaller particle size and more uniform distribution.

The present invention relates to the use of at least one soluble alkali metal compound for adjusting, in particular reducing, the viscosity of an aluminium sulphate suspension, wherein this alkali metal is selected from sodium, potassium and / or lithium.

This invention belongs to the field of petrochemical technology, specifically relating to a high-purity pseudoboehmite with concentrated pore size and its preparation method. The preparation method includes: mixing aluminum sulfate solution with ammonia water for a primary neutralization reaction; adding ammonia water and a pore-expanding agent to the resulting slurry for a secondary neutralization reaction; subsequently heating and allowing it to age; filtering, washing, drying, and pulverizing the aged product to obtain high-purity pseudoboehmite. The preparation method of this invention employs co-current and overflow neutralization, reducing the process flow and simplifying operation. It solves the problems of high synthesis cost, complex operation, and environmental pollution in existing pseudoboehmite synthesis methods. The generated byproduct, ammonium sulfate, has certain industrial application value. The pseudoboehmite obtained by this invention has the advantages of large specific surface area, large pore volume, and uniform and concentrated pore size distribution.

This invention discloses a method for preparing a modified aluminum-based pyrazole dicarboxylic acid framework composite water-absorbing material, relating to the field of atmospheric water-collecting and adsorbing materials. The method includes dissolving 3,5-pyrazole dicarboxylic acid, soluble aluminum salt, and an alkaline solution in deionized water and stirring to obtain a precursor solution. Method A utilizes the hydrophilic micropores of MOF-303 to forcibly disperse and confine magnesium chloride within the pores, fully releasing the high water absorption properties of the deliquescent salt while completely preventing liquefaction leakage after water absorption using the physical barrier effect of the pore walls. Method B employs in-situ co-synthesis technology to uniformly embed graphene oxide into the intercrystalline gaps of MOF-303, significantly improving its photothermal conversion efficiency without significantly affecting the material's original water absorption capacity. This results in a directional enhancement of photothermal performance and the lossless preservation of water absorption capacity, achieving directional control of the composite water-absorbing material's water absorption and photothermal conversion performance.

The application belongs to the technical field of sewage treatment, and particularly relates to a flocculant for sewage treatment and a preparation method thereof. The method comprises the following steps: S1, adding a sodium silicate solution to an aluminum salt and an iron salt to perform a polymerization reaction to obtain a polysilicate aluminum iron sol; S2, preparing a nano-cellulose graft copolymer emulsion; S3, mixing the polysilicate aluminum iron sol and the nano-cellulose graft copolymer emulsion to obtain a composite flocculation product; and S4, drying and crushing the obtained composite flocculation product to obtain the flocculant for sewage treatment. By means of cross-linking promoters, covalent bridges are constructed between inorganic components of the polysilicate aluminum iron and organic components of the nano-cellulose, and a stable inorganic-organic three-dimensional interpenetrating network is formed, so that the problem of easy phase separation and unstable performance of traditional physical compounded flocculants is fundamentally solved, and the uniformity and storage stability of the product are significantly improved.

This invention relates to the field of water treatment agents, specifically to a defluoridator for fluoride-containing industrial wastewater and its preparation method. The invention discloses a defluoridator for fluoride-containing industrial wastewater and its preparation method, which involves compounding aluminum sulfate, magnesium sulfate, and calcium-chitosan-grafted hydroxyapatite powder to obtain a highly efficient defluoridator, overcoming the shortcomings of single defluoridation materials in deep treatment. This defluoridator is suitable for the deep treatment of fluoride-containing industrial wastewater, achieving a defluoridation efficiency of over 98%, and the effluent fluoride concentration can be stably controlled below 2 mg / L. The preparation process of this invention is simple and easy to implement, with a fast reaction rate, strong operational stability, and a wide range of applicable water qualities. It can effectively adapt to fluoride-containing wastewater treatment scenarios in industries such as metallurgy, chemical engineering, and electroplating, and has good potential for industrial application and promotion.

The application discloses a kind of composite water purifying agent based on polymeric aluminum ferric sulfate.The preparation process is shown as follows: step 1: polymeric aluminum ferric sulfate solution is prepared by reacting ferrous sulfate heptahydrate, aluminum sulfate and sodium chlorate, phosphoric acid, etc.;step 2: the modified polyacrylamide solution is mixed with polymeric aluminum ferric sulfate solution to obtain a composite system;step 3: add the acid ocher soil to the composite system to obtain the composite water purifying agent.The benefits: the modified monomer is prepared by organic synthesis, and is copolymerized with acrylamide and other monomers to obtain modified polyacrylamide;then, the organic polymer is compounded with polymeric aluminum ferric sulfate solution and acid ocher soil to build a ternary water purification system of "inorganic-organic-mineral";the composite water purifying agent has the efficient electric neutralization capacity of inorganic flocculants, the bridging flocculation of organic polymers and the adsorption performance of minerals, and shows excellent flocculation and sedimentation effect and pollutant removal capacity.

The application belongs to the field of lithium ion battery materials, and particularly relates to a preparation method of an aluminum-coated precursor. x Co y Mn z (OH)2, x+y+z=1, and 0<=x<=1, 0<=y<=1, 0<=z<=1; an aluminum sulfate solution with a certain concentration and pH is configured; the aluminum sulfate solution is added into a reaction kettle, and an appropriate adding speed, temperature and stirring speed are controlled; after the addition is completed, a certain amount of sodium carbonate powder is added into the reaction kettle, and after stirring for a certain time, a conventional post-processing step of filtration, washing and drying is performed to obtain the aluminum-coated precursor particles. The whole process of the application only needs to be performed once, and the coating effect is good, no agglomeration phenomenon occurs, and the impurity sulfur content of the precursor is low. Therefore, the application has excellent production efficiency and a wide industrial application prospect.

The application discloses a kind of porous composite materials for sulfur dioxide capture and preparation method thereof, belong to porous adsorption material technical field, first introduce aluminium salt in polyacrylonitrile solution, by electrospinning and pre-oxidation-carbonization process structure with multistage pore structure's aluminium-doped carbon fiber framework, while significantly improving specific surface area, give material excellent mechanical strength and structural stability, subsequently in-situ load iron, calcium hydrate particles on the fiber surface, form multi-metal synergistic active site, realize the strengthening adsorption and fixed of sulfur dioxide, further utilize silane modified fly ash and red mud, diatomite, water glass and alkaline component complex, and through aluminum powder foaming and calcination constructs through channel, so that material still maintains excellent mechanical property under the condition of high sulfur dioxide capture capacity, can meet the stability requirement of high flow rate impact and long-term cyclic operation in industrial desulfurization tower.

The application discloses a surface sizing agent for corrugated paper and boxboard, a preparation method and application thereof, and belongs to the technical field of papermaking. The surface sizing agent is prepared by using water as a solvent, adopting an oxidation-reduction initiation system, combining with glyoxal post-crosslinking and polyaluminum chloride / aluminum sulfate post-treatment. The product has low foam, high stability and good paper machine adaptability. After the surface sizing agent is applied to the surface sizing of corrugated paper and boxboard, the ring crush index is increased by 18% to 25%, the Cobb value is reduced by more than 70%, the surface strength and breaking degree resistance are obviously improved, and the quality requirements of high-strength packaging paper are met. The preparation method is green and environment-friendly, and is easy for industrialized production.

A method for recycling anode material from a co-recycled stream of depleted lithium-ion batteries includes receiving a residual amount of precipitate from the cathode recycle stream. This precipitate is almost entirely graphite used for recycling battery anode material. The precipitate is produced by acid leaching of charging material from the lithium-ion battery recycle stream. A strong acid is added to the precipitate to remove residual cathode and separator material, and the mixture is heated. The strong acid removes residual alumina from the separator by conversion to aluminum sulfate. The acid-treated precipitate is washed to remove water-soluble contaminants, such as aluminum sulfate generated from the reaction of alumina and sulfuric acid, to produce substantially pure graphite. Any residual material remaining from the cathode recycle stage is also removed.

A self-flowing castable plugging method belongs to the technical field of refractory construction. According to the type of self-flowing castable, the corresponding accelerator is selected and heated. The preheated accelerator is injected into the leakage point of the mold to form a hardened plugging area. The silica sol type self-flowing castable uses aluminum sulfate type accelerator. The low cement type self-flowing castable uses sodium aluminate type accelerator. According to the measured temperature of the self-flowing castable and the environmental temperature, the preset heating temperature of the accelerator is calculated. The accelerator adding speed is calculated as follows: calculate the self-flowing castable flow rate per minute: calculate the accelerator adding speed per minute: based on the direct correlation of the self-flowing castable leakage flow, the accelerator adding speed is obtained, and the accelerator is pushed out from the multiple openings of the cylinder. In order to expand the shooting area, the needle around the cylinder can be opened. The physical and chemical state of the self-flowing castable at the leakage point is actively changed to make it quickly solidify, fundamentally solving the problem, and the efficiency is much higher than passive waiting.

This invention discloses a long-lasting, stable, low-alkali, two-component shotcrete accelerator, relating to the field of building materials, particularly suitable for extreme working conditions of high cold and high humidity, solving the problems of contradiction between low alkali and rapid setting, poor long-term stability, and performance failure in extreme environments of existing technologies. The accelerator comprises an accelerator component A and a long-lasting stabilizer component B (mass ratio 8:1-12:1): Component A contains 25-35% polyaluminum chloride, 20-30% aluminum sulfate, and 3-8% nano-silica, etc., while component B contains 5-10% sodium polyacrylate and 3-6% retarder, etc., with low-temperature activators or mildew inhibitors added as needed. Through synergistic effects of "chelation-steric hindrance-nano hydrogen bonding," it achieves an alkali content ≤0.5%, a conventional initial setting time ≤5.1 min, a 28-day strength retention rate ≥90%, a storage period ≥6 months, an initial setting time of -5℃ ≤7.8 min, and no mildew growth after 6 months in high humidity, making it suitable for various engineering projects and combining technological advancement with practicality.

This invention relates to a copper-based methanol catalyst with confinement effect, its preparation method, and its application, belonging to the field of catalyst preparation technology. The catalyst raw materials include a hydrotalcite precursor, a copper salt, and a solvent; the hydrotalcite precursor includes metal salt 1 and metal salt 2; metal salt 1 includes one of zinc salt, magnesium salt, lanthanum salt, cerium salt, zirconium salt, and manganese salt; metal salt 2 includes an aluminum salt; the solvent includes one of sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium dodecyl sulfate, and disodium ethylenediaminetetraacetate solution. Due to the strong accessibility of the corner sites of the hydrotalcite configuration, copper ions can be anchored at the corner sites of the hydrotalcite configuration. This forms a strong intermetallic interaction, thereby limiting the migration and aggregation of active centers, preventing excessive growth of copper particles before and after the reaction, and ensuring the stability of the catalyst.

The application relates to the technical field of concrete admixtures, and discloses an early-strength high-stability alkali-free accelerator and a preparation method thereof. The early-strength high-stability alkali-free accelerator is prepared from the following components in percentage by weight: aluminum sulfate 40-60%, aluminum tartrate solution 10-20%, alcohol amine compound 4-15%, 1,2-propylene glycol 5-10%, pH regulator 1.0-5.0%, magnesium sulfate 6-10%, stabilizer 1.0-1.5%, and water 3-8.5%. The raw material of the stabilizer comprises a sulfonic acid compound, and the sulfonic acid compound comprises one or more of 4-hydroxybenzenesulfonic acid, aniline-2,4-disulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid. The above technical scheme solves the problem of relatively poor stability of the alkali-free accelerator in the related art.

This invention discloses a trace element composition and its application for improving the fermentation efficiency of *Clostridium autoethanogenum* under conditions containing CO2 and H2 syngas, belonging to the field of microbial fermentation technology. The trace element composition comprises the following components: 1.5% nitroglycerin, 3% magnesium sulfate, 0.5% manganese sulfate, 0.1% ferrous sulfate, 0.18% cobalt sulfate, 0.1% calcium chloride, 0.18% zinc sulfate, 0.01% copper sulfate, 0.02% potassium aluminum sulfate, 0.01% boric acid, 0.01% sodium molybdate, 0.03% nickel chloride, and 0.004% sodium tungstate. Using the trace element composition of this invention, after 4 days of fermentation under conditions containing CO2 and H2 syngas (CO2:H2=1:2, CO-free), the cell concentration is nearly twice that of the control group without the composition, and the syngas utilization rate is significantly improved. This invention provides an effective technical solution to the problem of low fermentation efficiency of self-producing ethanol Clostridium in a pure CO2 and H2 system, and has good prospects for industrial application.

This invention belongs to the field of petrochemical catalysis technology and relates to a controlled hydrolysis method for trimethylaluminum and its application. The technical features of this invention are as follows: First, hydrated aluminum sulfate is recrystallized in an aqueous solution containing the antisolvent ethanol to prepare small-crystal, plate-like recrystallized hydrated aluminum sulfate. Second, the recrystallized hydrated aluminum sulfate is subjected to low-temperature drying to adjust its water of crystallization content, obtaining a small-crystal, plate-like aluminum sulfate hydrolysant with a specific water of crystallization content. Third, trimethylaluminum is hydrolyzed using the aluminum sulfate hydrolysant with a specific water of crystallization content, controlling the rate and extent of hydrolysis to obtain a methylaluminoxane co-catalyst solution containing aluminum sulfate. The methylaluminoxane co-catalyst solution containing aluminum sulfate prepared by the method of this invention does not require desalting treatment and can be directly used to construct a PNP-Cr ethylene selective tetramerization catalytic system, providing an option for reducing the manufacturing cost of methylaluminoxane and enabling on-site production and use of methylaluminoxane.

The present application relates to solid waste treatment technical field, disclose a kind of process for preparing silicon carbide based on super-enthalpy calcination energy supply of coal gangue and waste, comprising: coal gangue is crushed and sieved, while using the first part of recovery heat of calcining furnace backflow to preheat and send into furnace calcination;Calcination product is leached by hydrochloric acid, liquid phase extraction by-product aluminum salt, solid phase interception obtains silicon dioxide residue;Then, silicon dioxide residue is uniformly mixed with high-carbon waste;System dispatching second part of recovery heat provides high-temperature environment for downstream, drive mixture material to occur carbothermic reduction reaction, product is finally obtained after removing impurities by acid liquid step washing silicon carbide.The present application integrates heat cascade reuse and mineral phase chemical elution, reduces the cost of silicon-carbon source procurement and external heat consumption, and completes the high-value conversion of coal gangue and high-carbon waste.

The application relates to the technical field of concrete admixtures, and discloses an early-strength high-stability alkali-free accelerator and a preparation method thereof. The early-strength high-stability alkali-free accelerator is prepared from the following components in percentage by weight: aluminum sulfate 40-60%, aluminum tartrate solution 10-20%, alcohol amine compound 4-15%, 1,2-propylene glycol 5-10%, pH regulator 1.0-5.0%, magnesium sulfate 6-10%, stabilizer 1.0-1.5%, and water 3-8.5%. The raw material of the stabilizer comprises a sulfonic acid compound, and the sulfonic acid compound comprises one or more of 4-hydroxybenzenesulfonic acid, aniline-2,4-disulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid. The above technical scheme solves the problem of relatively poor stability of the alkali-free accelerator in the related art.

The application belongs to the field of preparation and application of catalysts, and provides a preparation method of a catalyst for synthesizing 2,6-diethyl anilino ethyl propyl ether, wherein the catalyst uses copper and aluminum salt as a metal source and an alkali solution as a precipitant, a copper-aluminum spinel catalyst is prepared by using a chemical co-precipitation method, and the catalyst is applied to the synthesis reaction of 2,6-diethyl anilino ethyl propyl ether which is an important intermediate of propamocarb. After process optimization, the application has the advantages of strong reaction selectivity, high yield, good color and high purity of the product, easy availability of the reaction raw material, simple operation, simple post-treatment, and repeated cyclic use of the copper-aluminum spinel catalyst, and not only meets the requirements of green chemistry, but also has important significance for energy saving and emission reduction.