43results about How to "Adsorption complete" patented technology

The invention relates to a farmland runoff pollution ecological intercepting ditch. The cross section of the ditch is trapezoid; the two walls and the bottom of the ditch are hardened by a concrete plate on which a plurality of rectangular holes are formed, and plants which have high capacity of absorbing nitrogen and phosphorus are planted in the holes; a plurality of check gates are arranged in the ditch; and the bottom of the ditch is provided with a plurality of filter boxes arranged in an S shape, holes are distributed on the four walls of each filter box all over, an adsorbing material which has high capacity of adsorbing the nitrogen and the phosphorus is filled in each filter box, and the plants which have high capacity of absorbing the nitrogen and the phosphorus are planted in the filter boxes. By the farmland runoff pollution ecological intercepting ditch, the nitrogen and the phosphorus in farmland drainage can be effectively intercepted, and the intercepting rate is over 50 percent and over 60 percent respectively; suspended matters in the farmland drainage can be effectively intercepted, and the intercepting rate is over 95 percent; the conventional farmland drainage ditch can be fully utilized, and the problem that ecological engineering occupies more cultivated land is solved; and engineering cost and maintenance cost are low, and the ditch is easy to operate and maintain and convenient to popularize and apply in a large area.

The invention provides a multivalent pneumococcal capsular polysaccharide composition as well as a preparation method and application thereof. The multivalent pneumococcal capsular polysaccharide composition contains a serotype 6A and at least one extra serotype selected from the group consisting of 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F. The multivalent pneumococcal capsular polysaccharide composition provided by the invention can be used for inducing an organism to generate humoral immunity, can generate a relatively good protecting effect for infectious diseases caused by the 24 common serotype pneumococcuses and is wide in immunity coverage rate and better in effect as comparison with various existing pneumococcal polysaccharide vaccines and conjugate vaccines sold on the market.

The invention provides a multivalent pneumococcus capsular polysaccharide-protein conjugated composition and a preparation method thereof. The conjugated composition is formed by covalent linkage of multivalent pneumococcus capsular polysaccharides of 14 different serotypes and carrier protein, wherein the 14 serotypes include 1, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F. The conjugated composition has good adsorption effect and good stability, has multiple immunogenicity and protective performance against invasion of the pneumococcus of 14 serotypes, is superior to on-sale low-valent pneumonia compositions, and the immune response of the conjugated composition disclosed by the invention is higher than that of an uncombined composition. The inoculating injection frequency can be reduced by using the multivalent pneumococcus capsular polysaccharide conjugate vaccine containing the conjugated composition, the immune process can be simplified, and diseases of human and animals caused by the 14 serotypes of pneumococcal bacteria can be effectively prevented. The conjugated composition has wider coverage and better immune effect.

The invention provides graphene oxide, a preparation method and application thereof. The preparation method of the graphene oxide comprises the following steps: under a stirring condition, adding natural graphite, sodium nitrate and potassium permanganate into concentrated sulfuric acid, continuing to stir at 0-4 DEG C and taking a reaction for 2 hours; raising the temperature to 35+ / -5 DEG C, continuing to stir, and taking a thermal insulation reaction for 20-40 minutes; raising the temperature to 90-95 DEG C, continuing to stir and performing the thermal insulation reaction for 15-30 minutes; then adding hydrogen peroxide, centrifuging the solution, washing the supernatant with diluted hydrochloric acid, centrifuging the washed supernatant until sulfate ions cannot be detected out from the supernatant, washing the solution with pure water and centrifuging until the supernatant is neutral; after freeze drying, obtaining the graphene oxide. The invention further provides the application of the graphene oxide in removal of pollutants from water. The graphene oxide provided by the invention can be used for quickly and efficiently adsorbing pollutants such as BPA and heavy metal ions in water, so that the treated water quality can reach the drinking water standard.

A vaccine for preventing both hepatitis A and hepatitis B and its preparing process are disclosed. It has high safety, immunogenicity and stability.

The invention relates to a preparation method of an extract, in particular to a preparation method of a wild chrysanthemum extract. The invention aims at solving the problems that the wild chrysanthemum extract prepared by the conventional preparation method for industry production mostly is a crude extract with low content of general flavone and can not meet the requirement of industrialized production. The preparation method comprises the following steps: I, wild chrysanthemum Chinese medicinal plant is boiled in deionized water to get concentrated clear paste; II, water is added to the clear paste, the PH value is adjusted and the upper layer liquid is collected; III, ethanol eluant is collected; and IV, ethanol is recovered, PH value is adjusted, the liquid is concentrated, the pressure is reduced and wild chrysanthemum extract is obtained. The extract obtained through the method provided by the invention has a high yield rate of 2.5%, and the obtained wild chrysanthemum extract contains more than 80% of general flavone contents, calculated by anhydrous rutin (CHO). The invention is used for preparing wild chrysanthemum extract, and the wild chrysanthemum extract can be used as raw materials for traditional Chinese medicine injection or oral liquid.

The invention discloses a pollution gas processing device used for interior decoration. The pollution gas processing device used for interior decoration comprises a housing; the external wall of the bottom of the housing are fixedly provided with four universal wheels using bolts; the four universal wheels are arranged at the four corners of the external wall of the bottom of the housing; the external wall of the top of the housing is fixedly provided with a drawing fan using bolts; one end of an exhausting port of the drawing fan is welded with a first guide pipe; the external wall of the topof the first guide pipe is fixedly provided with an air detection box using bolts; the external wall of the top of the housing is provided with a spliced eye; the internal wall of one side of the spliced eye is fixedly provided with a second guide pipe using bolts; one end of a wind outlet of the drawing fan is connected with the external wall of one side of the second guide pipe through welding.The pollution gas processing device is movable; moving of the pollution gas processing device is more convenient; device flexible moving capacity is improved; active carbon filter screen rotation isrealized preferably; gas in the housing is stirred at the same time; and the contact area of gas in the housing with the active carbon filter screen is enlarged.

The invention relates to the field of waste water treatment, and especially relates to a method for treating antimony-containing waste water by modified bentonite. The method provided by the invention solves the problems of treatment on high-concentration antimony-containing waste water. The method provided by the invention comprises the following steps of drying and crushing bentonite, carrying out fine grinding, carrying out boiling by a H2SO4 solution, washing, drying by an oven, grinding to obtain an adsorbent, adding the adsorbent into a reaction tank of antimony-containing waste water according to a weight ratio of 2.5%, mixing, adjusting a pH value of the mixture to a pH value of 5.5 to 6.5, stirring at a treatment temperature of 4 to 7 DEG C at a rate of 200 to 300r / min for 3 hours, and standing for 120 to 210 minutes for precipitation so that solid-liquid separation is realized and product water having low antimony content is obtained. The method provided by the invention has the advantages of high efficiency, low energy consumption, simple and easy processes, fast adsorption speed, large and full adsorption capacity, high clearance of antimony in waste water, low cost, good effects and wide application prospects, wherein through the method, the clearance of antimony in waste water can reach above 95%.

The invention relates to sepiolite-loaded soluble rubber powder modified asphalt and a preparation method thereof. The asphalt comprises the following raw materials in parts by weight: 10-15 parts ofrubber granules, 65-73 parts of petroleum asphalt, 10-15 parts of sepiolite powder, 0.1-1 part of a stabilizer, 5-8 parts of rubber oil and 0.1-1 part of a cross-linking agent. The preparation methodcomprises the following steps: drying the sepiolite powder for later use; shearing the rubber granules to obtain rubber powder, mixing the rubber powder with the sepiolite powder, adding the rubber oil, and carrying out dispersion treatment; heating the petroleum asphalt, adding a sepiolite powder loaded rubber powder modifier, shearing a mixed material, adding the stabilizer, stirring, adding thecross-linking agent, and stirring; heating the material, carrying out swelling development on the sepiolite powder and the rubber powder in the petroleum asphalt to obtain the sepiolite-loaded soluble rubber powder modified asphalt. Compared with the prior art, the asphalt is capable of remarkably alleviating problems that aging can be resulted as rubber asphalt is too large in viscosity in the production and construction process and too high in construction temperature, and has the advantages of being small in production smell, good in environment protection, and the like.

The invention provides a multivalence pneumococcus capsular polysaccharide-protein conjugate composition and a preparation method thereof. The conjugate composition is prepared from capsular polysaccharides of pneumococcus of 24 different serotypes and a carrier protein in a covalence connection manner, wherein the 24 different serotypes are 1, 2, 3, 4, 5, 6A, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F. The conjugate composition is good in adsorption effect and stability, has multiple immunogenicity and protection properties aiming at invasion of pneumococcus of the 24 serotypes, and is superior to the low-valence pneumonia composition in the market, and the immune response is higher than that of uncombined compositions. By inoculating a multivalence pneumococcus capsular polysaccharide conjugate vaccine prepared from the conjugate composition, the inoculation injection times can be reduced, the immunization procedure can be simplified, and meanwhile human beings and animals can be effectively prevented from diseases resulted from the pneumococcus of the 24 serotypes, and the conjugate composition is wide in coverage range and good in immune effect.

The invention provides a system for purifying carbon dioxide. The system comprises an air supply unit, a microwave adsorption and desorption unit and a separation unit which are connected in sequence;the microwave adsorption and desorption unit combines an adsorption tower with a microwave heating device, and a waveguide tube extending into the adsorption tower is arranged on the microwave heating device, so that the regeneration efficiency of the adsorbent is greatly improved, the device size is small, and the service life of an adsorbent is long; according to the method for purifying the carbon dioxide by utilizing the device, an adsorption technology, a microwave heating regeneration technology and a condensation separation technology are combined, so that the desorption regeneration efficiency of the adsorbent is improved, the cycle operation time is shortened, the energy consumption is reduced, carbon dioxide with the volume concentration of 85% or more can be obtained, and the system and method have a relatively high practical application value.

A device for ventilating a fuel tank of an internal combustion engine in particular of a fuel tank of an internal combustion engine of a motor vehicle includes an activated carbon filter and at least one valve which is controllable by a control unit. To prevent leakage of hydrocarbons into the environment without enlargement of the activated carbon filter the control unit controls the valve in dependence on a load factor of the activated carbon filter and / or in dependence on an operating cycle duration of the internal combustion engine.

The invention discloses equipment for removing aflatoxin from peanut oil by using activated carbon. The equipment is characterized by comprising a reaction tank, a standing tank and a supporting frame, wherein the reaction tank and the standing tank are fixed on supporting lugs of supporting columns of the supporting frame respectively; the reaction tank is provided with a feed opening, a stirrer and a blow-off valve A; a hot water outlet and a steam inlet are formed in a jacket of the reaction tank; a driving device and a fixing seat are arranged at the top of the reaction tank; the blow-off valve A is arranged at the bottom of the reaction tank and connected with an upper end cover of the standing tank through a flange; the standing tank is provided with a hand hole, an oil outlet valve and a reject valve; the hand hole is formed in the top of the standing tank; the oil outlet valve is arranged on the lower section of the standing tank; the reject valve is arranged at the bottom of the standing tank; the supporting frame is provided with the 3-4 supporting columns. With the utilization of the equipment for removing aflatoxin from peanut oil, the operation is simple, the original taste and nutriments are reserved in the peanut oil finished product to the greatest extent, the content of aflatoxin is greatly reduced, and various indexes conform to the existing national standards.

The invention discloses a high-efficiency waste gas treating device. The high-efficiency waste gas treating device comprises an outer frame, wherein a spring rod is fixedly connected to the left sideof the bottom part of the inner wall of the outer frame; a first motor is fixedly connected to the top end of the spring rod; one end of an output shaft of the first motor is fixedly connected with arotary rod; an absorbing plate is fixedly connected to the surface of the rotary rod; and a moving device is fixedly connected to the left side of the top part of the outer frame. The invention relates to the technical field of the waste gas treating device. The high-efficiency waste gas treating device disclosed by the invention has the advantages that the purpose of absorbing harmful substancesin waste gas conveniently is achieved; by arrangement of the moving device, the absorbing effect is improved and the working efficiency is improved simultaneously and the time is saved; disinfecting liquid is combined with the harmful substances in the waste gas, and the purifying effect is guaranteed, so that the pollution to the environment is prevented; convenience is brought for primarily isolating and filtering the waste gas, the complete adsorption of the waste gas is guaranteed and the practicability of the device is improved; the cyclic utilization for the disinfecting liquid is realized and the resource is saved, so that the high-efficiency waste gas treating device is more environmentally friendly.

The invention discloses a novel high-stability dust collection filtering cloth bag which comprises a fixing connector, wherein a mounting plate is fixedly mounted on the outer surface of the fixing connector; a first framework is fixedly connected with the outer surface of the lower end of the fixing connector; a bottom plate is fixedly mounted on the outer surface of the lower end of the first framework; a screw thread cover plate is arranged on the outer surface of the lower end of the bottom plate; a handle is mounted on the outer surface of the lower end of the screw thread cover plate; the outer surface of the first framework is sleeved by a first filtering cloth bag; the first filtering cloth bag comprises a dust collection layer, a thermal resistance layer and a piece of inner layercloth; the dust collection layer, the thermal resistance layer and the inner layer cloth form the first filtering cloth bag from outside to inside; a threaded interface is formed in the outer surfaceof the middle of the fixing connector; a clamping hoop is mounted on the outer surface of the first filtering cloth bag. By adopting the novel high-stability dust collection filtering cloth bag, thedust collection filtering cloth bag can be conveniently mounted, the dust collection filtering cloth bag is high in stability, the use effect of the dust collection filtering cloth bag can be improved, and practicability can be achieved.

The invention relates to a chitin fiber and silk fiber blended mask, which comprises a chitin fiber and silk fiber blended layer containing a nutrient solution, wherein the nutrient solution is prepared from the following components by weight percent: 40-60% of collagen peptide, 2-15% of sodium hyaluronate, 20-25% of cactus stem extract, 10-15% of aloe vera extract and 8-15% of vitamin C. According to the chitin fiber and silk fiber blended mask, the nutrient solution can penetrate stratum corneum of skin and then permeate dermis, effectively plays an efficient role in holding moisture, resisting wrinkles, restraining generation of melanin and delaying senescence; the mask can fit the skin well, no cut needs to be arranged, the nutrient solution can be fully absorbed, drop and leakage of the nutrient solution are avoided, much inconvenience caused to cosmetology of people by traditional masks is greatly improved, meanwhile, the mask has the characteristics of being soft, breathable, comfortable, fit, free of side effect and the like.

The invention provides a multivalent pneumococcal capsular polysaccharide composition as well as a preparation method and application thereof. The multivalent pneumococcal capsular polysaccharide composition contains a serotype 6A and at least one extra serotype selected from the group consisting of 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F. The multivalent pneumococcal capsular polysaccharide composition provided by the invention can be used for inducing an organism to generate humoral immunity, can generate a relatively good protecting effect for infectious diseases caused by the 24 common serotype pneumococcuses and is wide in immunity coverage rate and better in effect as comparison with various existing pneumococcal polysaccharide vaccines and conjugate vaccines sold on the market.

The invention discloses a preparation method for reserving ixeris sonchifolia hance extractive effective constituent, belonging to ixeris sonchifolia extraction field and aiming at solving the technical problems of the conventional preparation method of the ixeris sonchifolia hance extractive that the process is complex and organic acid is almost drained or damaged by lime cream. The preparation method includes the following stages: first, decocting the ixeris sonchifolia hance through deionized water twice and concentrating into clear paste; second, adding water to the clear paste to adjust the pH value, standing, collecting liquid supernatant, adjusting the pH value to 2-3, standing and then collecting the liquid supernatant; third, passing the liquid supernatant collected in stage 2 through a polyamide resin column, eluting with deionized water, eluting with ethanol solution to get rid of the resin column after pouring out the eluting water, and collecting the ethanol eluent; and fourth, distilling the ethanol eluent under reduced pressure to recover the ethanol, adjusting the pH value to 6.0-7.0, concentrating and drying under reduced pressure. In this way, the ixeris sonchifolia hance extractive can be obtained. Through the preparation method disclosed by the invention, the yield of the extractive can exceed 2.0% and the content of total flavonoids contained in the extractive is over 80%.

The invention relates to an organic gas recovery system of an upper layer oven of a coating machine, the organic gas recovery system comprises a first exhaust fan, a gas-gas heat exchanger, a recovery tower, a second exhaust fan, a first circulating device, a second circulating device, a first heat exchanger and a second heat exchanger. The recovery tower comprises a first recovery device and a second recovery device positioned at the upper part of the first recovery device. The first recovery device is internally provided with a first accommodating cavity and a first adsorption device. The second recovery device is internally provided with a second accommodating cavity and a second adsorption device. The first circulation device is respectively communicated with the first accommodating cavity and a space above the first adsorption device in the first recovery device. The second circulation device is respectively communicated with the second accommodating cavity and a space above the second adsorption device in the second recovery device. The recovery system uses the recovery tower to adsorb organic gases in a gas twice, and the adsorption is more complete. The gas flowing from the oven to the recovery tower exchanges heat with the gas flowing out of the recovery tower after adsorption treatment, and the temperature of the gas entering the oven is increased.

The invention relates to an air purifying agent and a preparation method and application thereof; the air purifying agent comprises carbon particles and an active material supported on the carbon particles; the mass ratio of the carbon particles to the active material is (5-10):(1-5); the active material includes 2-amino-2-ethyl-1-3-propanediol, polyvinyl chloride and nano titanium dioxide having a mass ratio of (100-200):(10-20):(5-20). As the active material is composed of nano titanium dioxide with 2-amino-2-ethyl-1-3-propanediol and polyvinyl alcohol, the air purifying agent of the invention is capable of playing a good role in removing formaldehyde, is also capable of removing germs in air to avoid secondary pollution, and has good effect in purifying air.

The invention discloses a dustproof and moistureproof distribution box capable of continuously dissipating heat. The dustproof and moistureproof distribution box comprises a distribution box and a part cavity arranged in the distribution box; an adhesive tape shaft is rotatably arranged on the rear wall of the part cavity; an adhesive tape reel is fixedly arranged on the adhesive tape shaft. The dustproof and moistureproof distribution box of the invention is provided with a rotating fan which blows air to dissipate the heat of the distribution box, so that heat generated by internal components of the distribution box is continuously led to the outside, loss caused by heat generation of the equipment in the distribution box is prevented; meanwhile, the fan rotates to drive a cleaning brush to periodically move, dust on the surface of a dust blocking plate is periodically cleaned, the influence of dust blockage on heat dissipation is prevented; a dust bonding adhesive tape is arranged in the distribution box, so that dust floating in the distribution box can be bonded, the internal cleaning state of the distribution box is greatly improved; the automation of a treatment process is realized, the treatment efficiency is greatly improved, and the labor force is saved.

The present invention discloses a motor vehicle exhaust gas purification catalysis device integral-type precious metal dosage control unit, and aims to provide an integral-type precious metal dosage control unit which can achieve high-dispersion addition of an active ingredient precious metal and sufficient and uniform mixing of the active ingredient precious metal with slurry for full adsorption of the precious metal to improve the stability of the slurry so as to improve the catalytic performance. The motor vehicle exhaust gas purification catalysis device integral-type precious metal dosage control unit includes a precious metal high-dispersion dropping device and a dosing device, the precious metal high-dispersion dropping device comprises a first support frame, a horizontally-distributed arc-shaped flow guide tube arranged on the top of the first support frame, and a liquid storage pot which is arranged on the first support frame and located above the arc-shaped flow guide tube, the bottom of the liquid storage pot is provided with a liquid outlet pipe communicating with the arc-shaped flow guide tube, the arc-shaped flow guide tube is provided with a plurality of vertical liquid dropping tubes, and the vertical liquid dropping tubes are provided with switching valves.

A method for processing liquid food containing a plasticizer relates to the technical field of food package. A columnar fixed bed adsorption separation method or a groove type adsorption separation method is adopted, and a carbon material is utilized as an adsorbent to adsorb the plasticizer in the liquid food. Simple preprocessing is conducted on the material, the obtained carbon material can adsorb and remove the harmful plasticizer in the liquid food efficiently and quickly, and the removing rate of the plasticizer in the liquid food can reach 100%. The method is simple in operation, conditions can be controlled easily, and industrialization can be achieved easily. The liquid food subjected to deep processing through the method can greatly reduce damage of the plasticizer to a human body, and the method has great significance on food processing and has wide application prospects in food processing.

The invention relates to a chitin fiber and silk fiber blended facial mask, which comprises a chitin fiber and silk fiber blended layer containing a nutrient solution, and the nutrient solution includes the following components in weight percentage: collagen peptide 40-60%, hyaluronic acid Sodium 2‑15%, Cactus Stem Extract 20‑25%, Aloe Vera Extract 10‑15%, Vitamin C8‑15%. The nutrient solution of the chitin fiber and silk fiber blended mask can penetrate into the dermis through the stratum corneum of the skin, effectively moisturizing, anti-wrinkle, inhibiting the formation of melanin, and delaying aging. Setting, the nutrient solution is completely absorbed, avoiding the phenomenon of nutrient solution dripping and leaking, which greatly improves the inconvenience caused by traditional facial masks to people. At the same time, it is soft, breathable, comfortable and docile, and has no side effects.

The invention relates to a preparation method of an aldehyde-removing catalyst, comprising the following steps: (1) dispersing graphene oxide in deionized water, then adding an aqueous solution of sodium carbonate dropwise thereto, and adjusting the pH value of the solution to 9-10, which is recorded as Solution A; (2) Disperse metal salt and complexing agent in deionized water, then add platinum precursor solution, stir evenly, record as solution B; (3) add solution B to solution A, stir evenly to form Solution C; (4) move solution C into a hydrothermal kettle, and keep it warm at 90-200°C for 8-24 hours; (5) separate solid-liquid from the heated solution C obtained in step (4), and freeze the separated solid substance drying; (6) calcining the dried solid matter obtained in step (5) at 200-500° C. for 1-4 hours in a nitrogen atmosphere to obtain the catalyst. In the preparation process, the present invention completes carrier preparation and impregnation loading in one step, which reduces the process and saves time and energy.

The invention discloses a mixed material screening device for waste battery treatment. The mixed material screening device for waste battery treatment comprises a screening box, wherein side frames are fixedly connected to the outer walls of the two sides of the screening box correspondingly; rotating rollers are arranged between the tops and the bottoms of the inner walls of the two sides of theside frames correspondingly; mounting through grooves are formed in the tops and the bottoms of the two sides of the screening box correspondingly; the outer walls of the rotating rollers are in transmission connection with transmission mesh belts penetrating through the mounting through grooves; motors are fixedly connected to the outer walls of one sides of the side frames, and the output shaftsof the motors are fixedly connected with one ends of the rotating rollers; an electric push rod is fixedly connected to the middle part of the top of the screening box; and a mounting frame is fixedly connected to the bottom end of a piston rod of the electric push rod. According to the mixed material screening device, metal in a waste battery mixture can be conveniently screened; the transmission mesh belts are impacted through impact balls to form a vibration effect; the waste battery mixture can be conveniently screened through the transmission mesh belts; and then the mixture is turned over, so the metal in the waste battery mixture can be completely adsorbed.

The present invention discloses a motor vehicle exhaust gas purification catalysis device carrier active component coating cooling system, and aims to provide a catalysis device carrier active component coating cooling system which can ensure adequate and homogeneous mixing of slurry of a noble metal active component for full adsorption of a noble metal to improve slurry stability so as to improve the catalytic properties. The motor vehicle exhaust gas purification catalysis device carrier active component coating cooling system includes an active component dosing device, a drying apparatus and a cooling apparatus, the active component dosing device comprises a first supporting frame, a dosing barrel which is arranged on the first supporting frame and has an upper opening, and a slurry mixing device arranged on the first supporting frame; the slurry mixing device comprises a vertical stirring rod rotatably arranged on the first supporting frame and a first rotation driving means used for rotating the vertical stirring rod, the lower end of the vertical stirring rod extends into the dosing barrel via the upper opening of the dosing barrel, and the vertical stirring rod is provided with a plurality of radially extending stirring blades.

The invention relates to a preparation technology of a catalyst for purification of motor vehicle exhaust. The preparation technology comprises the following steps: (1) preparing an acid liquid; (2), preparing slurry A; (3), preparing slurry B; (4), preparing slurry C; (5) preparing primary slurry; (6), preparing catalyst slurry; (7), coating a carrier. According to matching of different precious metal loaded materials, separate loading is performed, the utilization rate of precious metal is increased, the precious metal realizes the maximum effect on each material, the precious metal components are completely adsorbed, the slurry stability is improved, matching of the coating, the coating amount and the coating technology is realized, and the product consistency is improved; the technology is simplified, the disqualified rate is reduced, and the production cost is reduced.