42results about How to "Low cost and readily available" patented technology

The invention relates to a synthetic method for short-chain hydroxyl silicone oil. Firstly, the materials are proportionally measured according to raw materials components, then adding acid clay, water, and cyclotetrasiloxanes to a three-mouth flask with a reflux device, adding concentrated sulfuric acid in agitation condition, and reacting by controlling the reaction temperature, when the reaction is completed, adding magnesia and agitating about 10 minutes, then processing pumping filtration, distilling and recovering acetone using a rotary evaporimeter used for filtrating under the temperature of 45 DEG C, then adding sodium carbonate solution for neutralization under controllable temperature for stratification; then watering and washing the organic layer on the upper layer once or twice, then discharging water through stratification, and then feeding the organic layer into the rotary evaporimeter for warming up to 95 DEG C, depressing and detracting low-boiling residues, obtaining micromolecule hydroxyl silicone oil. The synthetic method for short-chain hydroxyl silicone oil has the advantages of simple technological process, easy controllable reaction condition, low cost and easily available raw materials, fast reaction generating speed, good product quality and high reactivity, and wide application range.

The invention discloses a preparing method for a composite repairing agent and the composite repairing agent prepared through the method. The preparing method comprises the steps that nanometer zero-valent iron is added in a sulfosalt solution, and a sulfosalt and nanometer zero-valent iron mixed solution is obtained; a hydroboron solution is added in the mixed solution to be sufficiently stirred,sulfide is reduced through the reducing capability of hydroboron, supernate is removed, and a vulcanized nanometer iron solid is obtained; and the vulcanized nanometer iron solid and a persulfate solution are mixed, and the composite repairing agent is obtained. A method for repairing organic pollutants in polluted soil and underground water through the composite repairing agent is further disclosed. The method can be widely applied to water treatment and soil repairing and has the beneficial effects that the production technology is simple, and preparing raw materials are easy to obtain; andsynchronous treatment of the organic matter in the polluted soil and the underground water is achieved, and good economic benefits and social benefits are achieved.

The invention provides a process method for improving the quality of non-combustible recycled tobacco leaf heated by thick slurry method and application thereof, A technology for manufacture the heated non-combustible recycle tobacco leaf by the thick slurry method, a material is added in two steps to prepare a homogenate. The composite biological agent is absorbed through the biomaterial immobilized carry. A tobacco raw material is pretreated by adsorption fermentation, subsequent to filt removal of that carrier, secondly, the pretreated tobacco raw material is subjected to high-temperature catalytic lignin pyrolysis under the alkaline condition to increase fragrance and prickle and Maillard reaction to increase fragrance, then when the heated non-combustible recycled tobacco leave is prepared by the conventional process of thick slurry method, wherein the tobacco leaves are rich in fragrance, have beautiful milk fragrance, chocolate fragrance and baking fragrance, have moderate strength, lower irritation and spicy taste, and improve smell and reduce wood flavor; In the new heating non-combustible cigarette application, harmonious and beautiful aroma, improve smoke aroma, improvedtaste, comfortable taste.

The invention relates to a manufacturing process of a graphene transparent conductive film. The manufacturing method includes the steps of 1), uncoiling a copper foil in a vacuum chamber, heating a copper-clad chemical deposition reaction zone by using a resistor, feeding in methane gas and hydrogen, subjecting a copper-clad surface to chemical sedimentation to generate a graphene layer, and then adopting plasma to perform etching processing on the graphene layer; 2), adopting a gravure printing process to obtain an oxidize graphene layer; 3), obtaining an oxide graphene film; 4), coating a copper chloride etching solution which is 200g / L in concentration on a copper-clad face of the oxidize graphene film; 5), subjecting the oxidize graphene film to thermal annealing and reduction; 6), coating resin adhesive, sticking the film for packaging, and finally obtaining the patterned graphene transparent conductive film. The manufacturing process is short in film forming time, and low-cost and large-scale mass manufacturing can be realized; the graphene transparent conduction film is high in electric conductivity, good in flexibility, high in pattern definition, higher in acid and alkali resistance of the transparent conductive film and lower in cost.

The invention discloses anti-static nano water-based anticorrosive paint and a preparation method thereof. The paint is prepared from pure acrylic emulsion, polyurethane emulsion, hydroxy propyl cellulose, nanosilicon dioxide, isothiazolone, mica powder, talcum powder, sodium dodecyl sulfate, fluoroethylene carbonate, heptadecanoic acide, glass fibers and brominated epoxy resin. The preparation method comprises the steps of weighing all raw materials according to the compounding ratio, dissolving the raw materials into water, conducting stirring so that the raw materials can be mixed uniformly, conducting grinding, adding slurry obtained after grinding to the pure acrylic emulsion and the polyurethane emulsion, conducting mixing uniformly, continuing with grinding and dispersion in a grinder, and leaving the mixture standing still at the room temperature, so that the anti-static nano water-based anticorrosive paint is obtained. The paint is large in surface resistance, good anti-static capability is displayed, the raw materials are low in cost and easy to obtain, and the paint is suitable for being used widely; the paint is good in water resistance and acid resistance, excellent in anticorrosive property, long in actual service life, stable, safe, environmentally friendly, excellent in performance and wide in application.

The invention belongs to the technical field of photothermal conversion materials, and discloses a nanoparticle photothermal conversion material based on coordination of iron and dopamine and a preparation method and application thereof. The preparation method comprises the following operation steps of: firstly, preparing a nanoscale iron-based metal organic framework by using a hydrothermal synthesis method; and then combining the dopamine in the nanoscale iron-based metal organic framework through the action of a coordination bond by virtue of a coordination effect of phenolic hydroxyl on the dopamine and the iron on the iron-based metal organic framework, so as to obtain the nanoparticle photothermal conversion material based on coordination of the iron and the dopamine. The material can be well applied to photothermal therapy drug preparation, photoacoustic imaging, nuclear magnetic imaging, drug loading or functional modification.

The invention discloses a method for removing impurities from aluminum ash and belongs to the technical field of compound impurity removal and industrial waste recycling. The method comprises the following steps: grinding, sieving and water-washing the aluminum ash, roasting to obtain roasted powder, and performing alkali dissolution on the roasted powder by using a NaOH solution to obtain an aluminum alkali solution; adding the aluminum alkali solution into diluted hydrochloric acid until the precipitation capacity of the solution is not changed any more, and performing solid-liquid separation to obtain AlCl3 filtrate; and introducing ammonia water into the AlCl3 filtrate, and filtering to obtain aluminium hydroxide precipitate to finally fulfill the aim of removing impurities from the aluminum ash. According to the method, processes of waster washing, roasting, alkali solution, acid treatment and the like are adopted, the impurities can be effectively removed, pure aluminum hydroxide precipitate is obtained, and high-purity raw materials are provided for subsequent preparation of aluminum oxide and other aluminum-containing products, so that the aluminum ash is completely utilized, and the method has the advantages of wide raw material source, low environmental pollution, low material consumption and energy consumption, low cost and the like, and is suitable for industrialized production.

The invention discloses a method for catalyzing hydrodeoxygenation of guaiacol to prepare cyclohexanol. According to the method, the cyclohexanol is prepared through a one-step hydrogenolysis method,in which decalin liquor of guaiacol is catalyzed through supported catalyst x percent-Ru-y percent-MnO / g-CNTs; the catalyst takes multiwalled carbon nanotube subjected to mixed acid treatment as a carrier, and is formed by loading Ru-MnO on the carrier; in neutral liquid phase, guaiacol is subjected to one-step hydrogenolysis to produce cyclohexanol; the maximum selectivity of principal product cyclohexanol can reach 85.84 percent; the percent conversion reaches 99.38 percent, that is, the yield reaches 85.31 percent. The method has the advantages that the process route is simple, reaction equipment and operation method are simple, the reaction condition is mild, the reaction time is short, the catalyst is simple and available, the cost is low, the stability is good, products are pure, separation and extraction are easy, the expected economic benefit is very noticeable, and the method has great significance when being applied to industrial production.

The invention discloses environment-friendly anti-static polyurethane anticorrosion paint and a preparation method thereof. The environment-friendly anti-static polyurethane anticorrosion paint comprises the following raw materials in parts by weight: 36-60 parts of aqueous polyurethane emulsion, 28-43 parts of aqueous acrylic resin, 4-13 parts of copper sulphide, 3-12 parts of montmorillonite, 2-9 parts of conductive mica powder, 2-10 parts of calcium carbonate, 2-5 parts of zinc oleate, 1-6 parts of PPG-n Laurate, 1-3 parts of sodium dodecyl sulfate, 1-2 parts of a levelling agent, 0.2-2 parts of an antifoaming agent, 12-25 parts of ethanol, and proper amount of deionized water. The prepared paint is large in surface resistance, shows good antistatic capability, and further, the conductive mica powder and copper sulphide raw materials are low in cost and easy to obtain and suitable for wide application. The prepared paint possesses good water proofness and acid resistance, displays excellent anticorrosion performance, and is long in practical service life and stable.

The invention discloses preparation of a CuO / attapulgite catalytic adsorber and a method of removing elementary mercury from flue gas by using the adsorber. The CuO / attapulgite catalytic adsorber is prepared with the attapulgite as a carrier and CuO as an active component. A preparation method includes the steps of: impregnating the attapulgite carrier in a copper salt precursor solution, stirring the mixture uniformly, allowing the mixture to stand and drying the mixture; successively calcining the attapulgite carrier in a nitrogen atmosphere and an air atmosphere to prepare the CuO / attapulgite catalytic adsorber. The method of removing elementary mercury from flue gas includes the steps of placing the catalytic adsorber in a fixed bed reactor, setting the temperature to be 150-250 DEG C, and feeding mercury-containing flue gas under normal temperature. Compared with the prior art, the catalytic adsorber has high catalytic activity and low energy consumption, low raw material cost and simple preparation method, can be recycled and reused and avoids secondary pollution.

The invention discloses a sulfonated poly(arylene ether phosphine oxide) polymer containing phenolphthalein and a preparation method of a sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein. The method comprises the following steps: with a sulfonated dihalogen triphenyl phosphine oxide monomer and / or a dihalogen triphenyl phosphine oxide monomer and phenolphthalein in equal molar as reaction raw materials, adding reaction raw materials, reaction solvents, a catalyst and a dehydrating agent together to a reactor, introducing protective gas, and conductingstirring, heating, dehydration and polymerization, cooling, precipitation and washing to obtain the sulfonated poly(arylene ether phosphine oxide) polymer; and dissolving the obtained sulfonated poly(arylene ether phosphine oxide) polymer, and conducting casting into a membrane to obtain the sulfonated poly(arylene ether phosphine oxide) polymer membrane containing phenolphthalein. The polymer membrane obtained by the method not only maintains high proton conductivity, but also the swelling of the polymer membrane is effectively reduced, and the comprehensive properties of the membrane are improved.

The invention discloses a synthesis process of 1-bromo-2,2-difluoroethylene, comprising the following steps: the first step, bromination reaction: using vinylidene fluoride as a raw material and bromine to perform bromination addition reaction to generate dibromo Difluoroethane; second step, elimination reaction: the dibromodifluoroethane generated above is irradiated by infrared light in the presence of a catalyst, and alkali is added to eliminate hydrogen bromide to generate 1-bromine 2,2-di Vinyl fluoride. The yield of the process of the invention reaches ≥ 90%, and the product purity ≥ 99.5%.

The invention discloses a method for generating 1,2-propanediol by directly performing hydrogenolysis on a glycerol water solution. According to the method, by using Ni-WO3 / meerschaum as a catalyst, hydrogen is added under alkaline conditions to catalyze the one-step synthesis of 1,2-propanediol from the glycerol water solution. The Ni-WO3 / meerschaum supported catalyst can be utilized to implement one-step hydrogenolysis on glycerol in a water phase under mild conditions to generate the 1,2-propanediol with favorable effects, wherein the glycerol conversion rate can reach 87.01%, and the 1,2-propanediol selectivity can reach 96.67%. The reactant raw materials and catalyst are accessible, and have the advantages of low cost and high stability. The method has the advantages of mild reaction conditions and short process, is convenient to operate, and satisfies the industrial production requirements.

The invention discloses a preparation method of trifluoroethylamine. The preparation method comprises the following steps: amination reaction: taking CHF2CH2X as a raw material, and feeding ammonia gas in the presence of a solvent and a catalyst to ammonify so as to generate trifluoroethylamine; and rectification: rectifying the ammonified product to obtain a finished product, filtering kettle liquid to obtain ammonium chloride as a by-product, and recycling filtrate used as the solvent of amination reaction. The catalyst is inorganic iodide, and the solvent is a frequently used organic solvent DMF or NMP. The purity of the prepared finished product is greater than or equal to 99.5%, and the yield of the finished product is greater than or equal to 90%.

The invention discloses an MEMS microphone and a micro electro mechanical system structure. The micro-electro-mechanical structure is applied to the front sound inlet MEMS microphone, and comprises asubstrate which is provided with a top surface, a bottom surface and a back cavity penetrating through the top surface and the bottom surface, wherein the top surface and the bottom surface are opposite; a back polar plate which is positioned on the top surface of the substrate and is provided with at least one through hole; a vibrating diaphragm, wherein the vibrating diaphragm and the back polarplate form a variable capacitor; and a protective layer which is located on the bottom surface of the substrate and used for preventing foreign matter from entering the gap between the back polar plate and the vibrating diaphragm through the back cavity and the through hole, and the vibrating diaphragm covers the back polar plate so as to prevent the foreign matter from entering the gap from thesurface, away from the back polar plate, of the vibrating diaphragm.

The invention discloses a feed capable of removing fishy smell of goose eggs. The feed comprises the following raw materials of unhulled rice, wheat, broad beans, pumpkins, carrots, bran, fish meal, table salt, and a Chinese herbal medicine additive, wherein the Chinese herbal medicine additive comprises the following raw materials of tangerine leaves, orange leaves, orange bark, pomelo peel, Chinese cinnamon, mint, fructus litsease, ocimum gratissimum l., and bee pollen, and the feed contains seasoning, and has the functions of promoting digestion of geese and strengthening the constitutionsof the geese. The feed provided by the invention is used for feeding the geese, the fishy smell of the goose eggs produced by the geese of different kinds can be completely removed, and after the geese are continuously fed with the feed for 2-3 months, the fishy smell can be obviously reduced.

The invention belongs to the technical field of modified asphalt, and particularly relates to novel bone glue modified asphalt and a preparation method thereof. The raw materials of the modified asphalt comprise the following components: matrix asphalt, bone glue (BG), dopamine (DOPA), mixed alkali, chitosan, zinc salt, cellulose and diethyl phthalate (DEP). According to the adhesion mechanism of mussel molecules, active group carboxyl (-COOH) in BG and amino (-NH2) in DOPA are subjected to a condensation modification reaction and then subjected to a coordination reaction with Zn<2+> in zinc salt to form a stable five-membered ring network BG-DOPA / Zn<2+> compound, and cellulose is added to prepare the cellulose enhanced BG-DOPA / Zn<2+> material. The cellulose enhanced BG-DOPA / Zn<2+> material is added into the matrix asphalt, so that the complex modulus of the matrix asphalt is increased, the phase angle of the asphalt is reduced, and the low-temperature crack resistance, rheological property, permanent deformation resistance and rutting resistance of the matrix asphalt are improved.

The invention discloses a preparation method and application of a porous graphene film. Graphene is generated through an in-situ method, namely under the condition of high temperature, a carbon precursor is firstly carbonized, then the carbon reduces a metal oxide into an elementary substance, and then the metal catalyzes the carbon into the graphene; compared with the process of preparing the graphene film by directly adopting the graphene as a raw material in the prior art, the process is simple, no pollution is caused in the production process, and a carbon source is cheap macromolecules orlarge organic molecules; the raw material is easy to obtain and low in cost, and the obtained film product is good in conductivity and rich in three-dimensional porous net structure and has good market prospects in the fields of electrode materials, water treatment and the like.

The invention discloses a method for generating 1,2-propanediol by directly performing hydrogenolysis on a glycerol water solution. According to the method, by using Ni-WO3 / meerschaum as a catalyst, hydrogen is added under alkaline conditions to catalyze the one-step synthesis of 1,2-propanediol from the glycerol water solution. The Ni-WO3 / meerschaum supported catalyst can be utilized to implement one-step hydrogenolysis on glycerol in a water phase under mild conditions to generate the 1,2-propanediol with favorable effects, wherein the glycerol conversion rate can reach 87.01%, and the 1,2-propanediol selectivity can reach 96.67%. The reactant raw materials and catalyst are accessible, and have the advantages of low cost and high stability. The method has the advantages of mild reaction conditions and short process, is convenient to operate, and satisfies the industrial production requirements.

The invention discloses a flotation method for efficiently purifying ardealite, and relates to the technical field of ardealite treatment. The method comprises the following steps: pumping ardealite from a transfer table filter in wet-process phosphoric acid production into a pump pool to make slurry, pumping the slurry into a high-frequency vibrating screen for screening, feeding oversize + 100-mesh coarse-grained products into a tailing slag warehouse, and pumping undersize-100-mesh products into a hydrocyclone for grading; an overflow product in the hydrocyclone enters a tailing collecting tank, and a sand setting product in the hydrocyclone enters a dewatering screen; undersize products of the dewatering screen enter a tailing collecting tank, oversize products of the dewatering screen enter a mineralization tank, filter pressing return water is added for size mixing, lime powder is added to adjust the pH value, and an efficient desilicication collecting agent is added for sufficient mixing; the mixed slurry is pumped into a flotation device through a conveying pump for reverse flotation, flotation concentrate enters a concentrate intermediate tank, the slurry in the concentrate intermediate tank is pumped into a filter press, a product obtained after filter pressing is a purified ardealite product, and filter press filtrate serves as filter pressing return water and returns into the mineralization tank for recycling.

The invention discloses a nitrogen-doped porous nano carbon material, a preparation method thereof and application of same as a lithium ion battery negative electrode material, and belongs to the field of material synthesis. The preparation method comprises the following steps: 1) preparing a potassium permanganate solution, preparing a manganese nitrate solution or a manganese chloride solution,mixing, and adding aniline to obtain a reaction solution; 2) carrying out hydrothermal reaction on the reaction solution to obtain MnOx-loaded polyaniline after the reaction is finished; 3) taking theprecipitate in the reaction product, and carrying out a carbonization reaction on the precipitate under flowing ammonia gas and inert gas to obtain a MnOx-loaded nitrogen-doped carbon material; and 4) pickling the MnOx-loaded nitrogen-doped carbon material obtained in the step 3) to obtain the nitrogen-doped porous nano carbon material. According to the preparation method, a surfactant is not needed, aniline and transition metal salt which are low in price are adopted as raw materials, a hydrothermal reaction and a heat treatment method are adopted for preparing the product, and the nitrogendoping amount is adjustable.

This field belongs to the technical field of modified asphalt, and in particular relates to a bone glue modified asphalt and a preparation method thereof. The raw material of the invention comprises the following components: matrix pitch, bone glue (BG), dopamine (DOPA), mixed alkali, chitosan, zinc salt, cellulose, and diethyl phthalate (DEP). According to the adhesion mechanism of mussel molecules, the present invention uses the active group carboxyl group (COOH) in BG to undergo condensation modification reaction with amino group (NH2) in DOPA, and then coordinates with Zn2+ in zinc salt to form a stable Five-membered ring network BG DOPA / Zn2+ compound, adding cellulose to prepare cellulose-reinforced BG DOPA / Zn2+ material. By adding cellulose to the base asphalt to reinforce the BG DOPA / Zn2+ material, the complex modulus of the base asphalt is increased, the phase angle of the asphalt is reduced, and the low temperature crack resistance, rheological properties, and permanent deformation resistance of the base asphalt are improved ability and its anti-rutting ability.

The invention discloses a method for preparing cyclohexanol by catalyzing the hydrodeoxygenation of guaiacol. The present invention prepares cyclohexanol by one-step hydrogenolysis of decahydronaphthalene solution of guaiacol with supported catalyst x%-Ru-y%-MnO / g-CNTs, and the catalyst is multi-walled carbon nanotubes treated with mixed acid as Carrier, Ru‑MnO co-loaded on it, prepared by one-step hydrogenolysis of guaiacol in neutral liquid phase to generate cyclohexanol, the highest selectivity of the main product cyclohexanol can reach 85.84%, the conversion rate at this time As high as 99.38%, that is, the yield is as high as 85.31%. The process route of the present invention is short, the reaction equipment and operation method are simple, the reaction conditions are mild, the reaction time is short, and the catalyst is simple and easy to obtain, low in cost, good in stability, and the product is pure. Separation and purification, the expected economic benefits are very considerable, and it is of great significance in the application of industrial production.

The invention provides a preparation method and application of a styrax extract, which uses tobacco rods and peanut shell biological materials to absorb composite biological preparations, biotransforms the residue after extracting resin from styrax bark, and then extracts and prepares styrax extract by continuous countercurrent ultrasonic extraction technology. It has rich and natural aromas such as fresh violet, cinnamon, roasted, and grilled cheese. The irritation is reduced, the quality of spices is improved, and the extraction rate is increased. The raw materials are cheap and easy to obtain, and the process conditions are mild; in electric heating and charcoal Applied in new heated cigarettes, harmonious with smoke aroma, rich in aroma, with cinnamon, fresh violet, roasted, grilled cheese, etc., reducing irritation and increasing throat comfort.

The invention discloses a method for preparing cyclopentanone through furfural water liquid hydrogenation rearrangement. According to the method, the cyclopentanone is prepared by catalyzing one-step hydrogenation rearrangement of the furfural water liquid by loading Ru and Cu bimetals doped on the MCM-41 through TiO2 doping, the highest selectivity of the cyclopentanone reaches 98.79%, the corresponding furfural conversion rate is 99.75%, namely, the yield is as high as 98.54%, meanwhile, the mass fraction of furfural in the furfural water liquid to be reacted can be remarkably improved and reaches 10-15%, and the method is suitable for industrial production. Therefore, enrichment and batch treatment of reaction products are facilitated. The method has the advantages of short process route, simple reaction equipment and operation method, mild reaction conditions, short reaction time, simple and easily available catalyst, low cost, good stability, pure product, easy separation and purification, reduction of the content of precious metals, effective increase of the mass fraction of the reactant furfural, and realization of industrial production. The expected economic benefit is very considerable, and the method has great significance in application of industrial production.

The invention discloses an MEMS microphone, a micro-electromechanical structure and a manufacturing method thereof. The micro-electromechanical structure includes: a first back polar plate having a first through hole; a second back polar plate provided with a second through hole and positioned on the first back polar plate; a vibrating diaphragm located between the first back polar plate and the second back polar plate, wherein the vibrating diaphragm and the first back polar plate form a first variable capacitor, and the vibrating diaphragm and the second back polar plate form a second variable capacitor; a first protective layer, wherein the first protective layer and the vibrating diaphragm are positioned on two sides of the first back polar plate respectively and are used for preventing foreign matters from entering a gap between the first back polar plate and the vibrating diaphragm through the first through hole; a second protective layer, wherein the second protective layer andthe vibrating diaphragm are positioned on two sides of the second back polar plate respectively and are used for preventing foreign matters from entering a gap between the second back polar plate andthe vibrating diaphragm through the second through hole; and a second connecting part positioned on the surface of the second back polar plate and fixedly connected between the second protective layerand the second back polar plate, so that the second protective layer is separated from the second back polar plate.

The invention discloses environment-friendly anti-static polyurethane anticorrosion paint and a preparation method thereof. The environment-friendly anti-static polyurethane anticorrosion paint comprises the following raw materials in parts by weight: 36-60 parts of aqueous polyurethane emulsion, 28-43 parts of aqueous acrylic resin, 4-13 parts of copper sulphide, 3-12 parts of montmorillonite, 2-9 parts of conductive mica powder, 2-10 parts of calcium carbonate, 2-5 parts of zinc oleate, 1-6 parts of PPG-n Laurate, 1-3 parts of sodium dodecyl sulfate, 1-2 parts of a levelling agent, 0.2-2 parts of an antifoaming agent, 12-25 parts of ethanol, and proper amount of deionized water. The prepared paint is large in surface resistance, shows good antistatic capability, and further, the conductive mica powder and copper sulphide raw materials are low in cost and easy to obtain and suitable for wide application. The prepared paint possesses good water proofness and acid resistance, displays excellent anticorrosion performance, and is long in practical service life and stable.

A composite catalyst and a preparation method thereof, the catalyst includes at least one carbon-composite transition metal carbide as an active component and silicon carbide as a carrier, when M represents the transition metal, MC is a transition metal carbide, The composite catalyst is represented as C-MC / SiC. The preparation method is as follows: first dissolve the transition metal salt to form a transition metal salt solution, and then mix it with silicon carbide; then evaporate the mixed solution to dryness, dry, and calcinate to obtain the precursor; finally, the precursor is in the reactor, microwave, carbonized, and cooled A composite catalyst is obtained. The invention can not only maximize the catalytic performance of the active components, but also greatly improve the stability of the catalyst, and contribute to the decomposition of hydrogen sulfide; alkali treatment of silicon carbide is more conducive to the absorption of hydrogen sulfide and break down. The raw materials of the catalyst are low in cost and easy to obtain, and the preparation method has simple steps, controllable process parameters and convenient operation.