63 results about "Alkene epoxidation" patented technology

The invention belongs to the field of fluorine-containing fine organic chemical synthesis, and particularly relates to a method for continuously and cleanly producing perfluoroolefin epoxide by using hydrogen peroxide. The invention relates to a method for continuously and cleanly producing perfluoroolefin epoxide by using hydrogen peroxide, which comprises the following steps of: reacting perfluoro-2-methyl-2-pentene serving as a raw material in the presence of a polar solvent and hydrogen peroxide serving as an oxidant under the action of a catalyst to obtain perfluoro-2-methyl-2, 3-epoxypentane. The method has the beneficial effects that the micro-reactor is used, and the oxidizing agent, the catalyst, the cocatalyst and the polar solvent are continuously introduced into the pipeline of the micro-reactor, so that the synthesis from the hexafluoropropylene dimer to the epoxy compound is completed in a short time.

The invention discloses an olefin epoxy titanium silicon oxide catalyst and a preparation method and application thereof. The ultraviolet Raman spectrogram of the olefin epoxy titanium silicon oxide catalyst shows spectrum peaks at 364 + / -6 cm <-1 >, 500 + / -6 cm <-1 > and 1102 + / -6 cm <-1 >, and the intensity of the spectrum peak 1102 + / -6 cm <-1 > is 1-10 times of the intensity of the spectrum peak 364 + / -6 cm <-1 >. The catalyst provided by the invention is used in olefin epoxidation reaction, and has the characteristics of high olefin conversion rate, high epoxide selectivity and good catalytic stability.

The invention discloses a carbon-based M-N-C catalyst as well as a preparation method and application thereof. According to the catalyst, mesoporous carbon particles serve as a carrier, an active component is an M-N-C site formed by coordination of a nitrogen element and transition metal, and the transition metal is at least one of Mn, Fe, Co, Ni and Cu. The catalyst can be applied to an olefin epoxidation reaction in which olefin and peroxide react to generate an epoxy compound, and has the advantages of low cost, favorable hydrophobicity, favorable activity and stability and favorable industrial application prospects.

This invention belongs to the field of catalyst technology and discloses a catalyst for olefin epoxidation, its preparation method, and its application. The preparation method includes: (1) preparing a mixture containing a silver compound precursor, an organic amine, water, and optional auxiliary agents to obtain a silver-containing mixture; (2) fully contacting the silver-containing mixture with an alumina support, and leaching off excess mixture from the surface of the support to obtain a support carrying the silver-containing mixture; (3) irradiating the support carrying the silver-containing mixture with microwaves to obtain the catalyst. The olefin epoxidation catalyst prepared by the method of this invention avoids local overheating during the preparation process, improves the dispersion of active centers, and thus has excellent catalytic performance.

The invention discloses a TS-1 molecular sieve catalyst, a preparation method and application of the TS-1 molecular sieve catalyst in preparation of an epoxy compound through epoxidation of hydrogen peroxide and alkene, the preparation method comprises the following steps: mixing a template agent with water, and then adding a silicon source to obtain a first solution; mixing a titanium source, soluble vanadium salt and isopropanol to obtain a second solution; stirring and mixing the first solution and the second solution, then adding octadecylamine polyoxyethylene ether biquaternary ammonium salt to obtain a reaction system, and then performing crystallization, separation and heat treatment to obtain the TS-1 molecular sieve catalyst. Through doping of vanadium heteroatoms and adjustment of octadecylamine polyoxyethylene ether biquaternary ammonium salt on a crystallization process, a hierarchical pore system is successfully constructed while high-activity titanium species are retained, and collaborative optimization of a pore structure and active sites is realized. The TS-1 molecular sieve catalyst obtained through optimization shows significantly enhanced catalytic activity and selectivity in an olefin epoxidation reaction system.

The invention relates to the technical field of heterogeneous catalysts, and particularly discloses a catalyst for catalyzing long-chain alpha-olefin epoxidation reaction and a preparation method and application thereof.The catalyst is a supported metal catalyst and comprises an active component, an auxiliary and a molecular sieve carrier, the active component is Sn element, the auxiliary is one or more of Zn, Zr and Ga, and the molecular sieve carrier is a molecular sieve carrier. The molecular sieve carrier is a dealumination Beta molecular sieve with a * BEA topological structure; the mass content of the active component accounts for 10-20wt% of the molecular sieve carrier; according to the present invention, the Sn element is adopted as the active component, the auxiliary agent and the molecular sieve carrier are combined to form the new long carbon chain alpha-olefin epoxidation catalytic system, and the heterogeneous catalyst can catalyze the long chain alpha-olefin to prepare the high carbon epoxide, and has advantages of high catalytic activity, high target product selectivity and the like.

The invention discloses a system for continuous green electrocatalytic synthesis of high-concentration hydrogen peroxide. The hydrogen peroxide synthesized through electrocatalysis can be directly used for the back-end olefin epoxidation reaction after being concentrated, the safety problem caused by easy explosion in the high-concentration hydrogen peroxide transportation process is avoided, the cost problem caused by hydrogen peroxide transportation is solved, and the greenness and economic added value of the whole technological process are increased. In the electrocatalytic synthesis process of hydrogen peroxide, the solid electrolyte is matched with water for use, so that the problem of subsequent separation caused by use of liquid electrolyte in the traditional electrocatalytic synthesis process of hydrogen peroxide is solved. Compared with an anthraquinone method in which hydrogen peroxide is concentrated from an organic solvent, the method has the advantage that the hydrogen peroxide concentration process is simple, convenient, green and economical due to mixing of water generated by electro-catalysis and hydrogen peroxide in the process.

The invention belongs to the technical field of chemical synthesis, and discloses a method for synthesizing fatty diol from straight-chain fatty olefin through a one-pot method under catalysis of titanium silicalite molecular sieve loaded sulfate. Through metal sulfate modification, acid sites on the surface of the titanium silicalite molecular sieve are increased, so that the catalytic epoxidation function of tetra-coordinated titanium and the catalytic hydrolysis function of the acid sites have a synergistic effect, and olefin epoxidation-epoxide hydrolysis reactions are connected in series. According to the process, olefin can be almost completely converted, and the problem of raw material recovery does not need to be considered. The bifunctional catalyst is used for preparing 1, 2-pentanediol from 1-pentene through a one-pot method, the conversion rate of 1-pentene is larger than 98%, the yield of 1, 2-pentanediol is larger than 77%, intermediate separation and additional acid and alkali are not needed in the whole process, the equipment corrosion risk is reduced, the problems of environmental pollution and complex process of a traditional process are solved, and the catalyst can be recycled and reused for multiple times.

The present application relates to the technical field of catalyst, in particular to a preparation method of TS-1 molecular sieve for olefin epoxidation; the main preparation method is as follows: tetraethyl orthosilicate is added dropwise into an aqueous solution containing tetrapropylammonium hydroxide; after the solution is clarified, a solution containing tetrabutyl titanate and isopropanol is added dropwise; after hydrolysis is completed, guanidine acetate is added; the precursor solution is obtained after stirring at a certain temperature for a period of time; the obtained solution is loaded into a kettle, and the crystallization product is obtained after hydrothermal crystallization; finally, the sheet-shaped TS-1 molecular sieve is obtained through centrifugation, drying and calcination; the present application has low cost, simple operation, short synthesis period, small size in the b-axis direction, improved diffusion mass transfer rate, and good catalytic activity in 1-hexene epoxidation, cyclohexene epoxidation, propylene epoxidation, chloropropylene epoxidation and phenol hydroxylation reaction.

The invention belongs to the technical field of preparation of epoxy compounds, and relates to an olefin epoxidation method. According to the method, reaction raw materials containing olefin and hydrogen peroxide are subjected to a reaction on a fixed bed reactor using a forming catalyst formed by compounding a titanium silicalite molecular sieve and an organic matter carbonized product. The catalyst is obtained by extrusion molding, drying and carbonization of a mixture containing a titanium silicalite molecular sieve, a benzene ring-containing polymer and a dispersing agent, the obtained catalyst has high mechanical strength and is suitable for olefin epoxidation fixed bed reaction. The method provided by the invention can effectively inhibit formation of byproducts, and realizes efficient utilization of hydrogen peroxide and efficient proceeding of olefin epoxidation reaction.

The present invention discloses a fully crystalline MWW structure titanium silicon molecular sieve catalyst and its preparation method and application. The ultraviolet Raman spectrum of the fully crystalline MWW structure titanium silicon molecular sieve catalyst is 343±6cm ‑1 、485±6cm ‑1 、529±6cm ‑1 and 1094±6cm ‑1 The molecular sieve catalyst is used in olefin epoxidation reaction and has the characteristics of high catalytic activity, high selectivity and good stability.

The invention provides a heteropolyacid-loaded titanium silicalite molecular sieve catalyst as well as a preparation method and application thereof. The heteropolyacid-loaded titanium silicalite molecular sieve catalyst comprises a titanium silicalite molecular sieve and heteropolyacid loaded on the titanium silicalite molecular sieve. Wherein the heteropoly acid comprises phosphomolybdic acid and / or phosphochromic acid, the heteropoly acid is introduced into the titanium silicalite molecular sieve, and molybdenum in the phosphomolybdic acid and chromium in the phosphochromic acid can serve as active sites of olefin epoxidation and form double active sites with titanium sites in the titanium silicalite molecular sieve to jointly promote the epoxidation process of olefin, so that the olefin epoxidation efficiency is improved, and the olefin epoxidation efficiency is improved. The catalytic activity of the catalyst is improved; on the other hand, the acidity of the heteropoly acid is beneficial to hydrolysis of epoxide into the final target product glycol. By adopting the heteropolyacid-loaded titanium silicalite molecular sieve catalyst provided by the invention, the one-step synthesis of diol from olefin can be realized, the separation energy consumption is reduced, and tests show that the selectivity of diol prepared by olefin epoxidation is 60% or more, and the olefin conversion rate is 10% or more.

The invention relates to a preparation method of an oxygen-vacancy-rich double-phase tungsten oxide WO3H2O / WO2.72 and application of the oxygen-vacancy-rich double-phase tungsten oxide WO3H2O / WO2.72 in olefin epoxidation reaction. The preparation method of the oxygen-vacancy-rich double-phase tungsten oxide WO3H2O / WO2.72 comprises the following steps that WCl6 and absolute ethyl alcohol are placed in a container according to the molar ratio of 0.003-0.005: 1, stirred to be dissolved and then transferred into a self-pressure reaction kettle; the preparation method comprises the following steps: adding WO3H2O and WO2.72 into a reaction kettle, reacting for 7-11 hours at 120-160 DEG C under dynamic stirring at 40-100 r / min, cooling, centrifuging or carrying out suction filtration, washing the obtained product with pure water and absolute ethyl alcohol for 3-4 times in sequence, and drying for 3-10 hours at 40-80 DEG C to obtain the dark blue double-phase tungsten oxide WO3H2O / WO2.72 with a flower-like nano hierarchical structure, WO3H2O and WO2.72 coexist in two phases, the content of W < 5 + > reaches 9-15%, the content of oxygen vacancy reaches 15-25%, and the specific surface area is 35-90 m < 2 > / g. The preparation method disclosed by the invention is simple, the process is easy to control, the repeatability is good, the prepared double-phase tungsten oxide WO3H2O / WO2.72 has a good catalytic effect in olefin epoxidation reaction, the cyclooctene conversion rate of the reaction at 60 DEG C for 6 hours is greater than 96%, and the selectivity of epoxy cyclooctane is greater than 99%.

The preparation method comprises the following steps: mixing a Ti-Beta molecular sieve, water, tetrapropylammonium hydroxide, tetrabutyl titanate and modified porous carbon, then carrying out a crystallization reaction, collecting insoluble substances, and carrying out calcination treatment, the titanium-silicon catalyst for catalyzing the olefin epoxidation reaction is obtained. According to the invention, a structure-directing agent tetrapropylammonium hydroxide is introduced on the basis of the Ti-Beta molecular sieve, modified porous carbon is also introduced when tetrapropylammonium hydroxide and tetrabutyl titanate are used for treatment, carbon components of the modified porous carbon are removed during high-temperature calcination, and metal components are combined with the molecular sieve in situ, so that pore diameters in a composite structure are richer, and a Ti active center is easier to expose. The titanium-silicon catalyst constructed by the invention has good catalytic activity and selectivity on olefin epoxidation reaction, and also has good reproducibility.

The present invention provides a titanium silicon molecular sieve, a nano gold supported titanium silicon molecular sieve catalyst, a catalyst preparation method and its use. The titanium silicon molecular sieve has a micropore specific surface area of ​​320-500 m 2 / g, micropore volume is 0.1-0.4 cm 3 / g, mesopore specific surface area is 50-100m 2 / g, mesopore volume is 0.075-0.1 cm 3 / g, particle diameter of 100 to 250 nm, ratio of micropore specific surface area to total specific surface area of ​​50 to 90%. The catalyst contains a titanium silicon molecular sieve carrier and nanogold supported thereon, and has a micropore volume of 0.06 to 0.4 cm 3 / g, micropore specific surface area is 160~450m 2 / g, mesopore volume is 0.05-0.08 cm 3 / g, mesopore specific surface area is 40-85m 2 / g and particle size is 100-250nm. The method for producing the catalyst includes the steps of alkali-treating the titanium silicon molecular sieve with an aliphatic amine aqueous solution and then supporting nanogold. The catalyst is used in olefin epoxidation reaction, cycloolefin epoxidation reaction, phenol hydroxylation reaction, and cyclohexanone ammonia ammoximation reaction. By supporting nanogold particles on the titanium silicon molecular sieve with specific physical property parameters, the dispersibility of nanogold is increased. When the catalyst is used in propylene gas phase epoxidation reaction, the catalytic activity is high, the conversion rate of propylene is improved to 8%-14%, and the selectivity of propylene oxide is improved to 90-99%.

A moderator management process that can be employed during an epoxidation process is disclosed. The disclosed moderator management process provides optimum catalyst performance without having to rely on a trial and error or using elaborate equations as disclosed in the prior art. In the disclosed moderator management process, the optimum halide-containing moderator concentrations can be determined by maintaining ΔEa from 30 kJ / mol to 300 kJ / mol, wherein ΔEa is the difference in activation energies between the reaction to remove halide from the surface of the epoxidation catalyst and the reaction to deposit halide on the surface of the epoxidation catalyst.

A composition of matter useful for catalyzing an alkene epoxidation reaction using molecular oxygen (O2) as an oxidant. including a plurality of structures comprising nanostructures or microstructures each comprising a coinage metal: and a plurality of single oxophilic metal atoms. The oxophilic metal is characterized by an oxide formation enthalpy being more exothermic than that of the coinage metal. In one or more examples. the oxophilic atom comprises nickel and the coinage metal comprises silver, and a concentration of the nickel increases selectivity to greater than 85% for the epoxidation reaction CH2═CH2+½O2→(CH2)2O over combustion of ethylene forming carbon dioxide. and for an ethylene conversion of greater than 5%.

The invention discloses a Ti-MWW molecular sieve catalyst, a preparation method and application of the Ti-MWW molecular sieve catalyst in preparation of an epoxy compound through direct epoxidation of hydrogen peroxide and olefin, and mainly relates to the technical field of molecular sieve catalysts. Compared with the prior art, the Ti-MWW molecular sieve catalyst prepared by the invention can simultaneously improve the selectivity of epoxy compounds and the conversion rate of hydrogen peroxide, can be applied to direct epoxidation reaction of hydrogen peroxide and alkene, optimizes the solvent, crystallization step and organic amine in preparation, and can better guide crystal growth in the forming process of the molecular sieve; a pore structure and an acid environment which are more beneficial to olefin epoxidation reaction are formed, the catalytic activity and selectivity to target reaction are finally enhanced, and the selectivity of epoxy compounds and the hydrogen peroxide conversion rate are improved.

The application discloses a titanium-silicon catalyst for olefin epoxidation reaction, and a preparation method and application of the catalyst. The catalyst can control the mesoporous molecular sieve material and the Ti-rich outer surface of the molecular sieve, and the active substance for olefin epoxidation reaction can be as close to the active center as possible and has small diffusion resistance and high catalytic efficiency.

A titanium silicalite molecular sieve has a micropore specific surface area of 320-500 m2 / g, a micropore volume of 0.1-0.4 cm3 / g, a mesopore specific surface area of 50-100 m2 / g, a mesopore volume of 0.075-0.1 cm3 / g, and a particle size of 100-250 nm. Its micropore specific surface area accounts for 50-90% of the total specific surface area. A catalyst contains the titanium silicalite molecular sieve carrier and is loaded with nano-gold particles. The catalyst has a micropore volume of 0.06-0.4 cm3 / g and a particle size of 100-250 nm. The catalyst is prepared by subjecting the titanium silicalite molecular sieve to an alkaline treatment with an aqueous aliphatic amine solution and then loading same with nano-gold particles. The catalyst is used for an olefin epoxidation reaction, a cycloolefin epoxidation reaction, a phenol hydroxylation reaction, and a cyclohexanone ammoximation reaction.

The invention belongs to the field of catalysts, and relates to a method for activating a silver catalyst as well as the catalyst and application thereof. Comprising the following steps: (1) fully contacting an alpha-alumina carrier with a silver-containing impregnation liquid, and leaching to remove redundant impregnation liquid to obtain a silver catalyst precursor; and (2) the silver catalyst precursor obtained in the step (1) is subjected to infrared radiation activation treatment, and the conditions of the infrared radiation activation treatment are as follows: the air velocity is 0-5000h <-1 >, the irradiation temperature is 100-500 DEG C, and the irradiation time is 1-50min. The activation method disclosed by the invention is advanced in process, safe, environment-friendly and simple to operate, the active components and the cocatalyst of the silver catalyst are uniformly distributed, and the prepared catalyst shows more excellent activity and selectivity in olefin epoxidation reaction.

This invention relates to a cobalt-supported pachytite catalyst, its preparation method, and its application in olefin epoxidation. The method includes the following steps: pre-treated pachytite is acidified with an organic acid to obtain acidified pachytite; the acidified pachytite and a cobalt source are added to water, and a hydrothermal reaction is carried out under stirring conditions; after the reaction, post-treatment is performed, and the pachytite-supported cobalt catalyst is collected. This invention uses organic acid to treat pachytite, which helps increase the interlayer spacing of the pachytite, thereby enabling the loading of metallic cobalt and providing a favorable catalytic environment for promoting the styrene epoxidation reaction. The catalyst obtained by this invention can be recycled for olefin epoxidation, significantly increasing the conversion and selectivity of olefins and effectively reducing byproducts. Under the action of this catalyst, oxygen from the air or directly introduced oxygen can be used as the oxidant, effectively reducing costs, avoiding pollution, and preventing the introduction of other impurities, which is beneficial for product separation and results in high purity.

The invention aims to provide a novel olefin epoxidation and resource conversion method driven by a commercial carbon-based material, belongs to the technical field of electro-catalysis energy conversion, and can be applied to olefin epoxidation and further resource utilization of epoxy compounds. According to the invention, the commercial carbon-based material is used as an electrode material to efficiently electrocatalyze olefin to generate an epoxy compound, the conversion rate and selectivity are high, and the electrode has good stability, can be repeatedly used to maintain high efficiency, and can be used as an electrocatalytic material for high-performance electrocatalytic epoxidation; efficient seawater resource utilization can be realized through a large amount of Cl <-> and Br <-> mediated reaction in seawater; the epoxy compound can be further subjected to electro-catalysis to generate a diol compound, and the reaction is carried out in pure water without adding other substances; a commercialized carbon-based material is used as an electrode to catalyze epoxidation and resource conversion of olefin, the reaction condition is simple, the cost is low, and the method is green and environment-friendly, so that commercialized application becomes possible.

The present invention relates to the field of olefin epoxidation reaction, and discloses an epoxidation reaction system and an epoxidation reaction method. The system comprises: an epoxidation reactor for carrying out epoxidation reaction; an epoxidation reaction feed heat exchange unit for heating and / or cooling the epoxidation reaction feed; a liquid heat transfer medium circulation unit for controlling the temperature of the epoxidation reaction; a control unit for controlling the temperature, flow, liquid level and pressure during the epoxidation reaction; wherein the epoxidation reaction feed heat exchange unit is provided with a first temperature control system; and the liquid heat transfer medium circulation unit is provided with a second temperature control system. The epoxidation reaction system and the epoxidation reaction method provided by the present invention effectively realize the stable control of the temperature during the epoxidation reaction, prolong the time of the epoxidation reaction process, and the method of the present invention is easy to operate, which is conducive to application in large-scale industrial automated production.

The application belongs to the technical field of epoxy compound preparation, and particularly relates to a titanium-silicon molecular sieve TS-1, a preparation method thereof and an olefin epoxidation method. The preparation method comprises the following steps: S1, hydrolysis dispersion: hydrolysis and dispersion of a mixture of a silicon source, a titanium source, a structure directing agent, a monosaccharide compound and water to obtain a mixed system I; S2, water-silicon ratio regulation: adding the mixed system I into a concentration kettle, reducing the water-silicon ratio of the mixed system I through distillation dehydration to obtain a mixed system II; S3, crystallization reaction: transferring the mixed system II into a closed crystallization kettle to crystallize under self-generated pressure, and finally filtering, drying and calcining to obtain the titanium-silicon molecular sieve TS-1. The monosaccharide compound introduced in the mixed system I contains rich hydroxyl groups, which can form hydrogen bond action with the silicon / titanium hydroxyl groups in the molecular sieve precursor, thereby affecting the growth process of the molecular sieve crystal grains, and on this basis, the nucleation process of the molecular sieve can be strengthened by regulating the water-silicon ratio.

The invention discloses a method for reducing the content of formaldehyde in an olefin epoxidation reaction product and a device for a hydrogen peroxide isopropyl benzene ring olefin oxidation reaction. The method for reducing the content of formaldehyde in the olefin epoxidation reaction product comprises the following steps: in the presence of a catalyst, cumyl hydroperoxide material flow and olefin are mixed to carry out epoxidation reaction, and the epoxidation reaction is carried out in stages. According to the method, formaldehyde can be effectively converted into formic acid and other components on the premise that olefin epoxidation reaction indexes are not affected basically, so that the concentration of formaldehyde in a reaction product is remarkably reduced. The method is simple, convenient and easy to operate, and other redundant components cannot be introduced into the reaction product.

The invention discloses an inorganic-organic composite metal silicate catalyst as well as a preparation method and application thereof, and is characterized in that the composition of the catalyst is xMOn / 2. Y R.1.0 SiO2, M is one or more than two metals of aluminum, iron, titanium and tin; n is the valence state of the metal M; x is the molar ratio of metal M to Si; r is cyclic organic amine with the ring number of 5-7; y is the molar ratio of the cyclic organic amine to Si; the catalyst is obtained by taking a zeolite molecular sieve as a raw material and carrying out hydrothermal reaction on the zeolite molecular sieve and a cyclic organic amine aqueous solution under high-temperature and high-pressure conditions; the catalyst is used for catalyzing a deacetalization-Kirschner condensation bifunctional cascade reaction of benzaldehyde dimethyl acetal and malononitrile and an epoxidation catalytic reaction of olefin to synthesize corresponding epoxide. Compared with the prior art, the preparation method disclosed by the invention is simple and convenient, and has the characteristics of mild reaction conditions, high target product yield and few byproducts in a deacetalization-Kirschner condensation acid-base bifunctional catalytic reaction and an olefin epoxidation catalytic reaction, and has a good application prospect.

The invention relates to the technical field of olefin epoxidation catalysts, in particular to a heterogeneous catalyst for an olefin epoxidation reaction as well as a preparation method and application of the heterogeneous catalyst. The catalyst provided by the invention comprises the following components: delta-MnO2, MoO3, WO3 and an AlPO4 carrier, the mass ratio of the delta-MnO2 to the MoO3 to the WO3 to the AlPO4 is (25 to 50) to (1 to 10) to (1 to 10) to 100. The catalyst disclosed by the invention has the advantages of all the components, can improve the interaction among the active components, has high dispersity and more active sites, can promote the improvement of the performance of the catalyst, enables all the performances of the catalyst to be remarkably improved, and has a good pore structure and better thermal conductivity; diffusion of a product in a pore channel and transfer of reaction heat can be enhanced, carbon deposition and overheating of the catalyst can be effectively prevented, and finally high yield and selectivity of the target product epoxy compound are achieved.

The invention belongs to the field of silver catalysts, and relates to a silver impregnation liquid for olefin epoxidation, a preparation method of the silver catalyst for olefin epoxidation, the silver catalyst prepared by the method, and applications of the silver impregnation liquid and the silver catalyst in olefin epoxidation. The silver impregnation liquid comprises the following components: 1) a silver amine complex; 2) steeping liquor stabilizer; 3) water; 4) an optional auxiliary agent; wherein the steeping liquor stabilizer is a small molecular organic matter which has electron withdrawing capability and contains carboxyl, ester group or anhydride functional group, and the content of the steeping liquor stabilizer is 0.01-20wt% on the basis of the total weight of the steeping liquor. The stability of the silver impregnation liquid is improved, suspended zero-valent silver nanoparticles in the impregnation liquid can be greatly reduced, the size distribution condition of activated catalyst silver particles is improved, and then the selectivity and stability of the catalyst are improved.