75results about How to "Moderate use" patented technology

A process for managing usage on a broadband network, said process comprising: (a) monitoring a subscriber's broadband usage; (b) determining if said usage rises to a level indicative of an event; (c) determining if said event is consistent with heavy usage or with a security incident; (d) if said event is consistent with heavy usage, offering said subscriber at least one of a plan for an upgraded subscription, or an incentive to concentrate usage in nonpeak time; and (e) if said event is consistent with a security incident, exercising security measures to minimize unintended usage.

The invention belongs to the field of chemical separation and discloses an olefin-alkane separating adsorbent, a preparation method thereof and an application of the olefin-alkane separating adsorbent in olefin-alkane separation. The olefin-alkane separating adsorbent takes porous carbon with a high specific surface area and ordered pore passages as an adsorbent carrier, and cuprous chloride as an active component, wherein the loading amount of univalent copper is 2-12 mmol in per gram of the carrier; the cuprous chloride and the porous carbon are fully ground and thermally treated in an inert atmosphere to prepare the olefin-alkane separating adsorbent. The olefin-alkane separating adsorbent contacts olefin and alkane so as to separate the olefin from the alkane by an adsorption method. The olefin-alkane separating adsorbent is easy to prepare and good in adsorption effect and can still maintain a relatively good adsorption effect after adsorption regeneration.

The invention discloses a preparation method of a catalyst for catalytic degradation of pollutants by ultraviolet light. The preparation method comprises the step of preparation of cadmium acetate, titanate and a PVP (polyvinyl pyrrolidone) precursor, and is characterized in that a cadmium sulfide and titanium dioxide catalyst is prepared with the process of first electrostatic spinning and later hydrothermal vulcanization. Cadmium salt is uniformly mixed into fiber with an electrostatic spinning method, and cadmium oxide is vulcanized with a hydrothermal method, so that cadmium sulfide is uniformly dispersed into the fiber; the reaction condition is mild, operation is simple and convenient, and the catalyst efficiency is high. Therefore, the preparation method has certain application value in the aspect of catalytic degradation of the pollutants by the ultraviolet light.

The invention discloses a compound catalyst with palladium and surface-functionalized carbon quantum dots carried by mesoporous carbon microsphere, a preparation method and an application thereof. Thecompound catalyst is composed of a mesoporous carbon microsphere carrier and surface-functionalized carbon quantum dots and metal palladium carried by the carrier, wherein dispersing 'snowflakes' areformed on the carrier surface by surface-functionalized carbon quantum dots and metal palladium; a surface-functionalized carbon quantum dot in size of not more than 10nm, which is directly loaded onthe carrier, is served as the center of each 'snowflake'; metal palladium is located by taking each surface-functionalized carbon quantum dot as an anchor and grows in the shape of snowflake around each surface-functionalized carbon quantum dot; the size of each 'snowflake' is within 40nm-100nm; N functional groups are introduced into the carbon quantum dots, so as to form the surface-functionalized carbon quantum dots; N functional groups are one or more of amino, pyridine nitrogen, pyrrolic nitrogen and graphite nitrogen. The invention also provides the application of the catalyst in the reaction of selective catalytic hydrogenation of crotonaldehyde for compounding crotyl alcohol.

The invention provides an in-situ sulfur-doped mesoporous carbon supported palladium metal catalyst, and a preparation method and application thereof. A required carrier material is directly obtainedby adopting a method of direct hydrothermal carbonization and calcination for further carbonization, so that sulfur can be doped into a skeleton of a carbon material and exists in a more stable form.In the sulfur-doped activated carbon supported noble metal catalyst, a large number of defects generated by doping are more beneficial to stable combination of palladium metal nanoparticles and the carrier, and strong interaction between sulfur and metal ensures high stability of the catalyst, so that metal nanoparticles are not easily agglomerated or lost in a hydrogenation reaction process, andthe service life of the catalyst is prolonged. Through the catalyst, halogenated nitrobenzene can be completely converted in a selective hydrogenation reaction of the halogenated nitrobenzene, and thehalogenated aniline selectivity can achieve 99.9%. In addition, the use condition is mild, stability is good, the use amount of the catalyst is less, and the service life of the catalyst is long.

The invention discloses preparation of a sulfur-doped activated carbon catalyst loaded with noble metal and application of the sulfur-doped activated carbon catalyst loaded with the noble metal in halogenated aromatic nitro-compound hydrogenation reaction. A preparation method is carried out according to the following steps that 1, a hydrothermal method is adopted for preparing sulfur-doped activated carbon; 2, the sulfur-doped activated carbon is taken, deionized water is added to prepare slurry, under stirring, a soluble noble metal compound solution is added dropwise, the noble metal is Pdor Pt, stirring is conducted, then a sodium acetate solution is added, stirring is conducted, an alkaline solution is added dropwise to adjust a pH to be 7-9, stirring is continued, and then a formaldehyde solution is added dropwise for reduction, so that the sulfur-doped activated carbon catalyst loaded with the noble metal is obtained. The catalyst is simple in preparation method operation, lowin cost, small in generated pollution and beneficial for industrial application. The catalyst is applied to halogenated aromatic nitro-compound liquid phase catalytic hydrogenation to prepare halogenated arylamine, the conversion rate and the selectivity are high, and the catalyst is good in stability, and can be recovered and reused for multiple times.

The invention discloses a preparation method of an estradiol magnetic molecularly imprinted nanoparticle electrochemical sensing membrane. According to the preparation method, an estradiol magnetic molecularly imprinted polymer is obtained via preparation of a molecularly imprinted self-assembled solution, polymerization, and template molecule elution. The estradiol magnetic molecularly imprinted nanoparticle electrochemical sensing membrane is high in selectivity, response speed, sensitivity, stability, tolerability, and universality, and is capable of realizing high efficiency, sensitive, real-time detection of estradiol in composite matrix.

The invention discloses an application of a CaO / AC solid catalyst in catalysis of an acetic acid in ozone oxidation wastewater. The CaO / AC solid catalyst is fed to the wastewater containing the acetic acid, and ozone is introduced for catalytic oxidation; according to the CaO / AC solid catalyst, AC is taken as a carrier and CaO is taken as an active component. According to the CaO / AC solid catalyst, the AC is taken as the carrier, the CaO is taken as the active component, a terminal oxygen atom of ozone is bonded with hydroxyl on the surface of the CaO / AC solid catalyst and a lewis base center, and the generated active oxygen is capable of effectively oxidatively degrading the acetic acid in the wastewater.

The invention relates to the field of paint removers, and discloses a paint remover and a preparation method thereof, and a paint removing method. The paint remover is prepared from the following components in parts by mass: 20 to 80 parts of ether, 10 to 60 parts of alcohol, 1 to 40 parts of inorganic alkali, 0.1 to 10 parts of a volatile inhibitor, 0.1 to 10 parts of a corrosion inhibitor, 0.1 to 5 parts of a surfactant and 0.1 to 4 parts of a thickening agent. The preparation method of the paint remover comprises the following steps: mixing the inorganic alkali, the ether, the alcohol, thevolatile inhibitor, the corrosion inhibitor, the surfactant and the thickening agent, and uniformly stirring to obtain the paint remover. According to the invention, the paint remover is low in toxicity, environmentally friendly, high in paint removing speed and good in paint removing effect, can avoid corrosion on metal base materials, improve the rust resistance of iron materials, improve the painting adhesive force of iron materials and effectively remove phenolic aldehyde paint films, alkyd paint films, nitro paint films, polyurethane paint films, epoxy resin paint films, water-based paintfilms and electrostatic powder paint films.

The invention relates to a preparation and application method of an oil antichlor. Firstly, active carbon is added in a strong oxidant medium for oxidization modification to obtain modified active carbon, then, a mixed solution of soluble metal salt and other auxiliary agents is used for loading, and finally the loaded modified active carbon is dried and activated in a protective atmosphere or vacuum to obtain the antichlor product. The antichlor is excellent in selective adsorption and stability and good in dechlorination effect. In a mild condition, through the antichlor, an organic chloride in an oil product can be reduced to 0.2 ppm.

The invention relates to intelligent arm muscle exercise sports equipment for a senior citizen, and belongs to the technical field of manufacturing of appliances for the senior citizens. A back cushion is placed under the back of the senior citizen lying on the back on a bed, wherein an information storage processor and a lithium ion battery are mounted in the middle inside the back cushion, a right pressure sensor and a right counting display are mounted on the right inside the back cushion, and a left pressure sensor and a left counting display are mounted on the left inside the back cushion; a right elastic rope and a right grip stick are mounted on the right side of the right pressure sensor, and a left elastic rope and a left grip stick are mounted on the left side of the left pressure sensor. The senior citizen grips the right grip stick with the right hand, performs flexion and extension movement through the right arm, grips the left grip stick with the left hand and performs flexion and extension movement through the left arm; accordingly, muscles of both arms can be exercised. Flexion and extension data of the arm muscles are converted into electrical signals by the pressure sensors, and the electrical signals are input into the counting displays and the information storage processor respectively and are stored, calculated and processed in the information storage processor, so that intelligent management and intelligent control of the exercise process are realized.

The invention discloses an environment-friendly water-based metal heavy oil stain cleaning agent, which comprises: 5-30 parts of alcohol amine ether, 1-8 parts of acetic acid, 0.5-7 parts of chelating agent, and 0.1-3 parts of bactericidal antiseptic , 5-20 parts of tartaric acid, 5-15 parts of fatty acid methyl ester ethoxylate sulfonate, 10-30 parts of nonionic surfactant mixture, and 0.5-5 parts of dispersion stabilizer. The alcohol amine ether of the present invention has various properties such as cleaning, rust prevention and lubrication, and can effectively improve the cleaning effect of the cleaning agent. This kind of cleaning agent can effectively remove oil stains caused by heavy oil, and the oil removal rate can reach more than 98%. The invention does not contain phosphorus substances, and the surface activity can be biodegraded or self-degraded, and will not pollute the environment. The cleaning agent prepared by the invention has obvious effect, high cleaning efficiency, and can effectively prevent metal corrosion.

The invention discloses a preparation method of a tertiary amine-terminated polyether nonionic surfactant, and belongs to the field of chemical synthesis technologies and surfactants. The preparation method comprises the following steps: (1) placing a supported catalyst in a fixed bed, and preheating the fixed bed; dissolving polyether amine and paraformaldehyde in a solvent to obtain a dissolved solution; then injecting the dissolved solution into a fixed bed, replacing air in the fixed bed with hydrogen, pressurizing the fixed bed with hydrogen, and carrying out a reaction; (2) after the reaction is finished, collecting feed liquid; and after the feed liquid is cooled, filtering and carrying out reduced pressure distillation to obtain the tertiary amine-terminated polyether. The method for continuously producing the tertiary amine-terminated polyether by using the fixed bed has the characteristics of safety, convenience in operation, short reaction time, few side reactions and suitability for large-scale production; the conversion rate of the primary amine is high, the selectivity of the tertiary amine is good, the yield of the tertiary amine-terminated polyether is up to 98.2%, and meanwhile, the tertiary amine-terminated polyether also has better surface activity.

The invention discloses a preparation method of a copper-containing zeolite adsorbent used for separating olefin from alkane. The preparation method of the copper-containing zeolite adsorbent used for separating olefin from alkane is capable of preparing relatively high content of cuprous active site with relatively low energy consumption in relatively short time, so that the separation performance of the copper-containing zeolite adsorbent during separation of olefin and alkane is improved. The preparation method of the copper-containing zeolite adsorbent used for separating olefin from alkane comprises the following steps: exchanging ions of a bivalent copper salt solution and a carrier zeolite, filtering reaction liquid to obtain solid, drying the solid to obtain bivalent cupric ion exchange zeolite, putting the obtained bivalent cupric ion exchange zeolite and a reducing agent in a sealed reaction kettle, separating the bivalent cupric ion exchange zeolite from the reducing agent by using an open container, enabling the zeolite to not be in direct contact with the reducing agent, introducing reducing agent steam and carrying out reduction reaction to obtain a zeolite adsorbent containing a cuprous active component.

A process for managing usage on a broadband network, said process comprising: (a) monitoring a subscriber's broadband usage; (b) determining if said usage rises to a level indicative of an event; (c) determining if said event is consistent with heavy usage or with a security incident; (d) if said event is consistent with heavy usage, offering said subscriber at least one of a plan for an upgraded subscription, or an incentive to concentrate usage in nonpeak time; and (e) if said event is consistent with a security incident, exercising security measures to minimize unintended usage.

The invention discloses a hydrogen chloride resistant basic catalyst, a preparation method and application. The basic catalyst comprises a carrier and an active component loaded on the carrier, wherein the carrier is selected from one in SiO2, gamma-Al2O3, SBA-15, active carbon, ZSM-5, MCM-22 and silica aerogel; the active component is selected from one or a combination of more in ionic liquid taking chloride ion as anion; the loading amount of the ionic liquid is 0.1 to 40 percent. The invention provides application of the basic catalyst to reaction in which vinylidene chloride is prepared from 1. 1.2-methyl chloroform gas phase dehydrochlorination. The basic catalyst has the advantages of long service life and high activity.

The invention provides a high-dispersion nitrogen-sulfur co-doped catalyst and a preparation method thereof, and an application in a reaction of synthesizing N,N-dibenzylidene ethylenediamine from N,N-dibenzylidene ethylenediamine. According to the invention, thiourea is adopted for one-step doping, so that operation is convenient, pollution is reduced, and defect sites generated by doping are beneficial to adsorption of precious metal; heteroatom nitrogen in a carbon skeleton can provide proper alkalinity, so that polymerization reaction of N,N-dibenzylidene ethylenediamine is reduced; heteroatomic sulfur plays a complexing role, so that strong interaction between sulfur and platinum can properly reduce the activity of the catalyst, inhibit the generation of CN hydrogenolysis reaction andimprove the selectivity of a target product; metal nanoparticles are not easy to agglomerate or lose in hydrogenation reaction, so that the service life of the catalyst is prolonged, and under the combined action of heteroatom nitrogen and heteroatom sulfur, the stability of platinum is greatly improved; and the catalyst provided by the invention has the advantages of mild use conditions, good stability, less catalyst dosage, more application times and long service life.

The invention relates to the field of non-medicine, and provides a new application of a metal organic framework material. Fungi are contacted with the metal organic framework material to achieve the effect of killing the fungi, and the metal organic framework material is formed by the action of a metal source and an organic ligand. The metal organic framework material is used, so that the antibacterial effect is excellent, and the harm of radiation, high temperature and the like does not exist.

The invention provides a CO2 complete methanation catalyst, an active component of the catalyst is NiO; an auxiliary agent is La2O3 and / or CeO2; or the auxiliary agent is MgO and La2O3 and / or CeO2, orthe auxiliary agent is Fe2O3 and La2O3 and / or CeO2, a carrier is Al2O3, and the catalyst comprises the following components in percentage by mass: 10%-20% of the NiO, 1%-5% of the La2O3 and / or CeO2,1%-5% of the MgO, 1%-5% of the Fe2O3 and / or CeO2 and the balance of the Al2O3. The catalyst is prepared by adopting a coprecipitation method and is applied through drying, roasting and forming. According to the catalyst, under the reaction conditions that the pressure is 2.5-4.5 MPa, the temperature is 300-400 DEG C, the air speed is 15000-50000 ml.g <-1 >. H <-1 >, and H2 / CO2 is equal to 4-4.5, the CO2 conversion rate and CH4 selectivity can be close to 100%. The catalyst is simple to prepare, shows excellent performance at high space velocity, and is suitable for industrial production and application.

The invention discloses a solid acid catalyst, which is characterized by taking bisulfate as an active ingredient and SiO2, ZnO, TiO2, ZrO2, Fe2O3, diatomite or active carbon as a carrier, wherein the loading amount of the active ingredients of the solid acid catalyst is 5 to 50wt%; and the bisulfate is ammonium bisulfate, sodium bisulfate or potassium bisulfate; the method of solid acid for the catalytic synthesis of 5-substituted tetrazole comprises the steps of: using nitrile compound and sodium azide as raw material and solid acid as catalyst, reacting for 8 to 72 hours in organic solvent at 120 to 160 DEG C, post-treating the reaction liquid to obtain the 5-substituted tetrazole; the solid acid catalyst of the invention has the advantages of moderate application conditions, high activity, simple preparation and no environmental pollution; and the process of the invention for synthesizing the 5-substituted tetrazole is simple and safe, easy in operation, high in yield, environmentally-friendly and suitable for industrial production.

The invention discloses a preparation method of an iron-based catalyst for alkylation reaction. The preparation method comprises the following steps: firstly preheating ionic liquid with a perfluoroalkyl group sulfimide structure to 60-90 DEG C, then adding an iron-containing compound, stirring for uniform mixing, and then reducing temperature to normal temperature; reacting at normal temperature for 6-24 hours for interreaction to generate a coordination compound so as to obtain the catalyst used for catalyzing Friedel-Crafts alkylation reaction. The catalyst prepared through the method disclosed by the invention is used for synthesizing the Friedel-Crafts alkylation reaction, such as the reaction of synthesizing dodecylbenzene by using benzene and 1-laurylene; in addition, the catalyst has the characteristics of high activity, high 2-LAB (2-Linear Alkylbenzene) selectivity, moderation in use condition, good water resistance, low possibility in hydrolysis and good recycling property and can be recovered through a simple method.

The invention relates to the technical field of cleaning agents for metal products and particularly relates to a special low-temperature cleaning agent for strip steel. The low-temperature cleaning agent comprises the following components in parts by weight: 10-16 parts of mixed alkaline solution, 2-5 parts of aqueous hydrogen peroxide solution, 2-4 parts of surfactant solution, 0.1-0.22 part of a complexing assistant, 1-2 parts of polyoxypropylene glycerol ether and 1-3 parts of antibacterial agent. Compared with the prior art, the special low-temperature cleaning agent for strip steel can be used under a low temperature condition and is few in foam. The formula provided by the invention is mild in using condition, so that the cleaning agent is particularly suitable for surface treatment of stripe steel at a certain speed and is further suitable for surface treatment of large common metal products. The cleaning agent is low in cost, wide in source of raw materials and suitable for popularization and application.

The invention belongs to the field of panels, and particularly relates to an electrostatic adsorption panel, comprising a functional medium layer, an insulating layer, a barrier layer, an electrode layer and an insulating substrate layer, which are sequentially arranged from top to bottom, wherein the functional medium layer, the insulating layer and the barrier layer adopt multilayer composite structures with precise thickness control functions; the barrier layer completely and seamlessly covers the surface of the electrode layer and is seamlessly connected with the insulating layer; and theinsulating layer and the electrode layer adopt parallel cross complementary setting structures on the horizontal direction. Power is supplied in a pulse manner to generate an electrostatic adsorptionforce. The electrostatic adsorption panel of the invention can generate stronger electrostatic adsorption force under relatively low power supply conditions, has the advantages of high efficiency, energy saving, moisture resistance and the like, and can meet the safety requirements of direct contact with the human body.

The invention provides a coal tar hydrogenation pretreatment catalyst and a preparation method thereof. The preparation method comprises the following steps: A: taking macroporous dry glue powder of which the main phase is pseudoboehmite; B. dissolving polyvinyl alcohol in water, and adding acid to obtain an acidic glue solution; C. evenly mixing the acidic glue solution, macroporous dry glue powder and assistants, and carrying out strip molding to obtain dry strips; D. carrying out high-temperature roasting on the dry strips to obtain an alumina support; and E. impregnating the alumina support in metal components, and roasting to obtain the macroporous guard catalyst. The catalyst has the advantages of high hydrogenation demetallization activity, high metal removal rate, long operation cycle, mild operating conditions and low requirements for equipment.

The invention discloses a production method of a binding strap with tensile strength more than or equal to 1000MPa. The method comprises the following steps: cold-rolling a pickled 30Mn2 hot-rolled coil; uncoiling, stripping and removing burrs, and then carrying out high temperature austenitizing; quenching the coil in a mixed solution consisting of triton X-100, Tween 20 and water; washing with water as conventional means and tempering the coil; naturally air-cooling to room temperature; and coiling. A finished product of the invention is 0.8-1.0mm thick, 1030-1070MPa in tensile strength, 10-12% in elongation rate and no less than 4 times in repeated bending time, and a blue layer which is uniform and dense, strong in adhesive force and 4-6microns thick is generated on the surface. The performances of the finished product completely meet the demands of binding and packaging heavy-coil hot-rolled steel coils.

The invention discloses a 3D (three-dimensional) printing method of a building structural wall, comprising the steps of mixing waste concrete powder and waste brick powder, crushing, grinding, drying,adding cement, and mixing well to obtain a first material; mixing carbon nanotubes, castor oil and water, heating, stirring, drying by spraying, adding formic acid and petroleum ester, mixing well, adjusting temperature for stirring, dropwise adding phosphoric acid solution, continuing to perform stirring, dropwise adding hydrogen peroxide, stirring, filtering, drying, adding a water reducer, iron tailings, nano zirconia, gypsum, iolite and nano spherical iron oxide magnet powder, and mixing well to obtain a second material; adding, continuing to perform stirring while adding the first material, the second material and bismaleimide, continuing to perform stirring until a viscous slurry is obtained, transferring the slurry to a 3D printing system, and performing printing to obtain the building structural wall.

The invention relates to a rhodium catalyst for preparing D,L-menthol and a preparation method of D,L-menthol, wherein the rhodium catalyst is prepared by the following method: 1) adding rhodium salt,nickel salt and zinc salt into water to obtain a mixed saline solution; 2) soaking the carrier in a mixed saline solution, uniformly stirring, and carrying out reduced pressure distillation to removewater, thereby obtaining powder; and 3) reducing the powder in a hydrogen atmosphere, and washing and drying the powder to obtain the rhodium catalyst. The preparation method of the D,L-menthol comprises the following steps: S1) adding a rhodium catalyst and thymol into a hydrogenation kettle, and replacing air with hydrogen; and S2) heating the kettle, introducing hydrogen, carrying out a catalytic hydrogenation reaction, and then carrying out an isomerization reaction. Compared with the prior art, the method has the advantages that the self-made rhodium catalyst is used for catalyzing thymol hydrogenation to obtain isomers mainly containing d and lmenthol, the conversion rate of thymol can reach 99.9%, and the selectivity of generated d and lmenthol is high and is 65.0% to 70.0%; and the selectivity of D,L-isomenthol generation is low (6.0-8.0%).

The invention relates to a thermally driven catalyst. The thermally driven catalyst is formed by a metal oxide nanostructure and a compound structure adhered on the surface of the metal oxide nanostructure and comprising identical metal quantum dot. The metal oxide nanostructure can be a tungsten oxide nanowire with the size of 8*5000nm, the chemical formula of the tungsten oxide nanowire is W18O49, and the metal quantum dot can be tungsten quantum dot with the size of 1*10nm. The thermally driven catalyst can absorb infrared irradiation or absorb outside heat in a manner of heat transfer, andthe absorbed heat is used for driving to catalyze the degradation reaction of organic matters in an aqueous solution, and the thermally driven catalyst has the advantages of being mild in usage conditions, capable of continuously driving the degradation reaction without the need of achieving specific temperature, high in catalysis efficiency, capable of keeping stability of catalytic performanceafter being repeatedly used, and the like, and can be applied in the fields of sewage treatment, harmless treatment of various flammable and combustible harmful substances, and the like.

The invention relates to an extraction method of rose-boot small molecular substances capable of resisting altitude reaction, which comprises the steps of high-pressure steaming, enzymatic hydrolysis, adsorption, filtration, concentration, drying and finished product packaging. The extraction method is characterized in that the extraction method specifically comprises the following steps of taking dried small block rose-boot raw materials and steaming the raw materials for one hour at constant temperature being 124DEG C and constant pressure being 0.14MPa; after disinfection by increasing temperature, decreasing the temperature to 53DEG C, adding 0.7% special enzymes for plant extraction and conducting enzymatic hydrolysis for 3.5 hours; adding 6% activated carbon for adsorption; primarily filtering statically placed solution through a filter, then filtering the solution by using a plate-frame protection filter and finally filtering the solution to a supernatant fluid storage tank; and conducting vacuum concentration at negative 0.05MPa and 80DEG C and detecting the baume degree during concentration. The extraction method of rose-boot small molecular substances capable of resisting altitude reaction has the advantages of simple process and high extraction rate, and is suitable for the extraction of rose-boot small molecular substances.

The invention discloses a ruthenium dioxide catalyst applied to oxychlorination of methane. The ruthenium dioxide catalyst comprises a carrier, an active component loaded on the carrier, co-catalysiscomponents and a carrier modification additive, wherein the carrier comprises titanium dioxide; the active component is ruthenium dioxide; the co-catalysis components comprise alkali metal componentsand rare-earth metal components; the carrier modification additive is silicon dioxide. The invention also discloses a preparation method of the ruthenium dioxide catalyst. According to the catalyst, through the co-catalysis components including alkali metal components and rare-earth metal components, the dispersibility of ruthenium dioxide as the active component is improved; the active site structure of ruthenium dioxide is changed; the catalyst has two high-activity sites for activating C-H bonds and activating O2; the activation of methane is facilitated; the excessive oxidization of the product is avoided; the catalyst also has high methane conversion rate and monochloro methane selectivity; the catalyst obtained by the preparation method can be directly used for catalyzing oxychlorination reaction of methane without pretreatment.