660 results about "Reduction treatment" patented technology

The invention relates to the technical field of hydrometallurgy, in particular to a method for selectively leaching and separating cobalt and manganese from crude cobalt hydroxide leaching residues. The separation method provided by the invention comprises the following steps: S1, pre-reduction treatment; and S3, cobalt is leached through selective oxidation, and manganese is precipitated. According to the separation method, the synergistic effect of ORP and pH is regulated and controlled, proper reducing agents and oxidizing agents are selected, cobalt is selectively leached through step-by-step oxidation, dissolution of manganese is inhibited, manganese circularly entering a leaching and extraction system is reduced, the leaching and extraction operation cost is reduced, meanwhile, a selective complexing agent is introduced, impurity co-dissolution is reduced, the subsequent purification process is simplified, and the method is suitable for industrial production. The preparation method is simple to operate and easy for industrial production, and has a good application prospect.

The invention discloses a high-elastic graphene-based metamaterial and a preparation method thereof.The preparation method comprises the steps that a graphene oxide solution is processed through a wet method and extruded through a large-size flow channel, blocky graphene oxide hydrogel is obtained, a fluid subdivision device is additionally arranged in front of a solution spraying opening, graphene oxide sheets generate a velocity gradient difference when subjected to subdivision multi-flow-field shearing, and the high-elastic graphene-based metamaterial is obtained; graphene oxide hydrogel with C-shaped superstructure arrangement is obtained by rearranging a graphene oxide lamellar texture, and the high-elasticity graphene-based metamaterial is obtained after freeze drying and reduction treatment.

The invention discloses high-surface-quality 780MPa-grade hot-dip galvanized DH steel and a production process thereof. The hot-dip galvanized DH steel comprises the following main chemical components in percentage by mass: 0.155 to 0.19 percent of C, 1.6 to 2.0 percent of Mn, 0.2 to 0.6 percent of Si, 0.1 to 0.15 percent of Cr, 0.4 to 1.0 percent of Al, 0.015 to 0.030 percent of Nb, less than or equal to 0.021 percent of Ti, 0.7 to 1.5 percent of Si and Al, and the balance of Fe and inevitable impurities. By accurately controlling the contents of Si and Mn in the steel and assisting with pre-oxidation-reduction treatment, external oxidation of Si and Mn elements is reduced to the maximum extent, the wettability and adhesive force of the surface of the steel are improved, and therefore high-quality hot galvanizing treatment is achieved, and the problem of skip plating is effectively solved. According to the comprehensive technical means, the excellent performance of the steel is reserved, meanwhile, the completeness and uniformity of a plating layer are guaranteed, the corrosion resistance of a product is improved, and the service life of the product is prolonged.

The invention provides a preparation method of a nickel-based catalyst and application of the nickel-based catalyst in hydrogen production through ammonia decomposition, and the nickel-based catalyst is a Ni / CeOx catalytic system and is of a Ni-O-Ce atomic-scale dispersed structure; the preparation method comprises the following steps: dispersing a nickel precursor and a Ce precursor in ultrapure water, and stirring and dissolving to obtain a nickel-cerium mixed salt solution A; dissolving sodium hydroxide and sodium carbonate in ultrapure water, stirring and dissolving to form a mixed alkali solution B; heating deionized water, adding the solution A and the solution B at the same time by adopting a dropping funnel, crystallizing, precipitating, drying and grinding to obtain a precursor; and S4, performing reduction treatment on the precursor in the presence of hydrogen, thereby obtaining the product. According to the Ni / CeOx catalytic system constructed by the invention, ammonia gas can be almost completely converted into hydrogen at the flow rate of 10mL min <-1 > and the temperature of 500 DEG C, the conversion rate exceeds the equilibrium conversion rate at the temperature of 550 DEG C, even if the flow rate is increased to 3 times, the performance is not reduced, complete conversion is realized, the hydrogen production rate can be increased without increasing the temperature, and high-efficiency hydrogen production at low temperature is realized.

The invention provides metal-doped porous carbon as well as a preparation method and application thereof, and belongs to the field of battery material preparation. By adding the activating agent and the cross-linking agent, in the curing treatment process, the phenyl resin can be preliminarily carbonized under the action of the activating agent to form tiny pores with uniform structures, and is cross-linked under the combined action of the activating agent and the cross-linking agent to form a three-dimensional pore structure, so that the stability of the material structure in the subsequent treatment process is favorably maintained; and then, more active sites are further formed on the surface of the material and in pores during pickling and impurity removal, so that reduction treatment can be more uniformly carried out in the pores, and the uniformity of the pore structure is better. Furthermore, a porous carbon structure with a stable structure is formed after high-temperature carbonization treatment, defects are reduced, and a uniform and stable nano-pore structure is formed after activation treatment, so that the compressive strength of the material is improved. And in addition, during metal melting doping, metal doping is more uniform, and the conductivity can be effectively improved.

The invention relates to the technical field of nano powder material preparation, in particular to a method for preparing molybdenum powder based on a spray granulation precursor and the molybdenum powder. The method for preparing the molybdenum powder comprises the steps that ammonium molybdate and a pore forming agent are dissolved in ultrapure water at the room temperature, and mixed slurry is obtained; carrying out spray granulation treatment on the mixed slurry to obtain composite powder particles containing the pore-forming agent and ammonium molybdate; the composite powder particles are placed in an oxygen-containing atmosphere to be roasted, and superfine nano molybdenum trioxide is obtained; placing the superfine nano molybdenum trioxide in a hydrogen atmosphere for primary reduction treatment to obtain superfine molybdenum dioxide powder; and the superfine molybdenum dioxide powder is subjected to second-stage reduction treatment, the superfine molybdenum powder is obtained, and the reduction conditions of the first-stage reduction treatment and the second-stage reduction treatment are different. According to the preparation method, the superfine molybdenum powder with good uniformity and dispersity can be prepared.

The invention provides a test device and method for evaluating chlorine resistance of a material. The test device comprises a water treatment unit; a chlorine dioxide generating unit; the storage tank is used for mixing the purified water and the chlorine dioxide therein to form a test solution; the test system comprises a water tank and a test unit, the test unit comprises at least one sample rack and a test device, the sample rack is used for fixing a test sample, and the test device is used for monitoring the performance of the test sample; the circulating system comprises a circulating pipeline and a circulating pump, the circulating pipeline is used for communicating the storage tank with the water tank to form a circulating path, and the circulating pump is used for enabling the test solution to circularly flow in the circulating path; and the wastewater treatment unit is communicated with the circulating pipeline and is used for reducing the test solution separated from the circulating pipeline and discharging the test solution out of the device. The test device is provided with the circulating system, so that various parameters of the test solution can be kept stable, and meanwhile, the operability, the safety and the environmental protection are obviously improved.

The invention provides an MOF-based derivative composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysts. The MOF is quenched in the soluble metal salt solution after being calcined, the MOF derivative material formed through calcination can be rapidly cooled through quenching, a large number of defects are formed on the surface of the MOF derivative material, on one hand, the number of oxygen vacancies can be increased through the defects, and the oxygen vacancies are beneficial to electron transmission and improvement of the catalytic effect; on the other hand, the metal loading capacity can be improved, the binding force between the MOF derivative material and the metal is high, the MOF derivative material is not prone to falling off, and the photocatalyst has good stability. According to the method, metal ions can be promoted to be reduced to form metal simple substances or metal clusters through reduction treatment, and the metals can generate heat when being used as the photocatalyst, so that oxygen vacancies and the metals generate light-heat effect for concerted catalysis, and the degradation effect of the photocatalyst on antibiotics is further improved.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The utility model discloses a center rotation type oil storage tank sludge cleaning reduction treatment device and a control system thereof. The center seat is arranged at the geometric center of the bottom of the oil storage tank; the rotating seat is rotationally mounted on the central seat through a rotating mechanism; the swing arm is hinged to the rotating seat through a deflection mechanism; the sludge suction filter head and the hydraulic jet head are arranged on the swing arm and pass through an area range between the central seat and the oil storage tank through deflection of the swing arm and rotation of the rotary seat; one ends of the pumping and draining header pipe and the spraying header pipe are positioned outside the oil storage tank, and the other ends of the pumping and draining header pipe and the spraying header pipe extend to the central seat and are respectively communicated with the sludge pumping filter head and the hydraulic spraying head through a sludge pumping pipe and a hydraulic spraying pipe. Compared with the prior art, the utility model has the beneficial effects that the built-in flushing and suction mode is adopted, so that sediments at the bottom can be effectively removed, and the full coverage of the bottom in the tank can be effectively ensured.

The invention discloses a graphene-organic silicon core-shell defoaming agent and a preparation method thereof.The defoaming agent is of a core-shell structure with graphene as a core and organic silicon as a shell, and the graphene and the organic silicon have a synergistic effect, so that the defoaming agent is good in monodispersity and can stably play a defoaming role at the high temperature. Preparing a graphene oxide dispersion liquid; meanwhile, a PDMS prepolymer is prepared, and the graphene oxide dispersion liquid is dropwise added into a PDMS prepolymer system, so that the organic silicon monomer is subjected to graft polymerization reaction on the surface of the graphene oxide. And then carrying out reduction treatment on the reaction product to convert the graphene oxide into reduced graphene oxide to form a core-shell structure, and carrying out centrifugal separation, washing and vacuum drying to obtain the graphene-organic silicon core-shell defoaming agent. The problems that an existing defoaming agent is poor in dispersity, weak in interface bonding force and insufficient in high temperature resistance in the high polymer material forming process are solved, and the defoaming efficiency and the product quality are improved.

The invention provides a catalyst for one-step preparation of diamine from lactam and a preparation method and application of the catalyst. A catalyst carrier is sequentially subjected to sensitization treatment operation in the step S1, activation treatment operation in the step S2 so as to enable the catalyst carrier to load active metal, complexing treatment operation in the step S3, reduction treatment operation in the step S4 and acid treatment operation in the step S5; the catalyst can be coupled with an ammoniation reaction for preparing diamine from lactam and an aminonitrile hydrogenation reaction, so that the diamine is produced through one-step reaction of lactam, and the production process is greatly simplified.

The utility model provides an integrated multi-stage anti-blocking biological deodorization and purification device, which belongs to the technical field of biological deodorization and purification, and comprises a box body, the interior of the box body is divided into a pretreatment chamber, a biological deodorization chamber and a post-treatment chamber from left to right by arranging partition plates, and the pretreatment chamber, the biological deodorization chamber and the post-treatment chamber are communicated in sequence. An air inlet, an air outlet, a water inlet and a water outlet are respectively arranged outside the box body. A spray head and a corrugated plate for dust removal and humidification are arranged in a pretreatment chamber, a pressure sensor and a back-flushing spraying device are arranged at a packed bed, and pre-dust-falling treatment at an air inlet and back-flushing cleaning at the packed bed are realized through a two-step method, so that the problem that the deodorization efficiency is influenced by blockage of a biological packing layer can be effectively solved; the efficient and safe operation of the biological deodorization and purification device is ensured.

The invention provides a method for manufacturing a terbium-dysprosium-iron giant magnetostrictive alloy based on three-dimensional photocuring molding, which comprises the following steps of: firstly, preparing three-dimensional photocuring molding slurry, adopting photosensitive resin as a matrix, and matching with a metal organic chelating agent containing terbium-dysprosium-iron giant magnetostrictive alloy component to enhance the uniform distribution of metal powder so as to ensure the printing precision and the material stability; secondly, the resin and the chelating agent are removed through heat treatment degreasing, the degreasing process is controlled by controlling the heating rate, and structural collapse is avoided; decarburization is carried out in a low-oxygen atmosphere, so that the purity of the alloy is improved, and the structural integrity before sintering is ensured; then reduction treatment is performed to improve the structural stability and purity; and finally, high-temperature sintering is carried out under the assistance of a magnetic field, grain orientation and magnetic domain arrangement are optimized, and the magnetostrictive effect and the force-magnetic energy conversion efficiency are improved. According to the method, three-dimensional light curing forming and magnetic field auxiliary heat treatment are combined, and the risk of structural damage in the printing process of the terbium dysprosium iron giant magnetostrictive alloy is practically and effectively avoided.

The present invention belongs to the technical field of medical devices, and specifically is a nursing suction device for an intensive care unit, including a left bottle, a right bottle, a gas transmission mechanism, a mounting frame, and a reversing mechanism. In order to improve the suction efficiency and reduce the discomfort of patients, a single-tube delivery method is adopted, and the patient can be treated with suction therapy and expectorant therapy respectively, reducing the number of pipes inserted into the affected part, and at the same time, the steps of pulling out and plugging pipes and expectorant therapy when treating thick sputum can be optimized, shortening the treatment time while improving the suction efficiency, solving the problem that traditional suction devices cannot perform expectorant therapy and too many pipes are inserted into the affected part for suction therapy. At the same time, the adjustment method of suction and expectorant is simple, and only the switching coil magnet and the trigger judgment of the left trigger and the right trigger need to be exchanged, which helps medical staff to master the use method more quickly, improve work efficiency, and save precious time.

The invention relates to a method for preparing an efficient electromagnetic shielding graphene film by using a rapid Joule heat technology, and belongs to the technical field of functional materials and application thereof. The method comprises the following steps: firstly, preparing a graphene oxide film through vacuum filtration, then carrying out pre-reduction treatment under the protection of argon, heating the film to 700 DEG C, and carrying out heat preservation for 1 hour so as to remove part of oxygen functional groups; and then, soaking the pre-reduced film in a ferric chloride ethanol solution, introducing a Fe3O4 nanoparticle precursor, and carrying out discharge treatment for 0.1 second under the voltage of 100V through a rapid Joule thermal reduction technology to realize rapid reduction of graphene oxide and doping of Fe3O4 nanoparticles. The finally prepared graphene film shows excellent electromagnetic shielding effectiveness in an X wave band (8-12 GHz), the electromagnetic shielding effectiveness reaches 38 dB, and the electromagnetic shielding effectiveness is improved by 2 dB compared with a sample (36 dB) not doped with Fe3O4. The method has the advantages of being easy and convenient to operate, low in energy consumption and high in reduction efficiency, meanwhile, the synergistic effect of conductivity loss, magnetic loss and dielectric loss is achieved through introduction of the Fe3O4 nanoparticles, the electromagnetic shielding performance of the material is remarkably improved, and the method is suitable for the fields of electromagnetic interference protection of electronic equipment and the like.

The invention discloses a tail gas centralized treatment device and method in coconut shell activated carbon production, and relates to the technical field of tail gas treatment.The tail gas centralized treatment device in coconut shell activated carbon production comprises a base, a carbonizing machine is fixedly installed at the top of the base, and a heat exchange machine is fixedly installed at the top of the base; the tail gas centralized treatment device comprises a base, a heat exchanger is fixedly mounted at the top of the base, a gas conveying pipe fixedly penetrates through the bottom of the heat exchanger, a treatment barrel is fixedly mounted at the top of the base, and a cyclone separator is fixedly mounted at the top of the treatment barrel. At the moment, the cyclone separator is started and separates out large-particle impurities in the tail gas, so that equipment is prevented from being blocked and abraded, the service life is prolonged, the load on equipment parts can be reduced, the overall purification efficiency is improved, subsequent treatment is facilitated, and the situation that the large-particle impurities wrap reactants to affect the solid-liquid separation efficiency is avoided.

The utility model discloses a side-standing folding type oil storage tank mud removal reduction treatment device and a control system thereof, and the device comprises a base which is installed at the side edge of the bottom in an oil storage tank; the rotating seat is rotationally mounted above the base; the lifting rod is arranged on one side of the rotating seat and is provided with a sliding seat capable of moving up and down; the inner ends of the first hinge arm and the first hinge rod are respectively hinged with the rotating seat and / or the lifting rod, and a first linkage plate is hinged between the outer ends of the first hinge arm and the first hinge rod; the inner end of the pull rod is hinged to the first linkage plate; the inner ends of the second hinge arm and the second hinge rod are respectively hinged with the outer end of the pull rod and the first linkage plate, and a second linkage plate is hinged between the outer ends of the second hinge arm and the second hinge rod; one end of the linkage rod is hinged to the sliding seat, and the other end of the linkage rod is hinged to the first hinge arm or the first hinge rod; the first hinge arm is hinged to the second hinge arm; and the suction nozzle and the impact nozzle are arranged on the second linkage plate. Compared with the prior art, the side-standing folding type mud removal device has the advantages that the side-standing folding type structure is arranged on one side of the bottom of the oil storage tank, and the bottom range of the whole oil storage tank can be covered through rotation and folding so that timely, effective and efficient mud removal operation can be carried out.

The invention discloses a high-strength and high-plasticity copper alloy and a preparation method thereof. The high-strength and high-plasticity copper alloy is prepared by mixing Cu-Al pre-alloyed spherical powder and CuO powder according to the mass ratio of (100-150): 1, wherein the Cu-Al pre-alloyed spherical powder and the CuO powder are different in particle size range. The solid solution state Al element part in the high-strength plastic copper alloy is oxidized into Al2O3 through CuO, and the Al2O3 exists in a Cu matrix. The preparation method comprises the following steps: (1) mixing Cu-Al pre-alloyed spherical powder with CuO powder, and drying; (2) cold isostatic pressing treatment; (3) vacuumizing, sintering at a high temperature in a protective atmosphere, and cooling; (4) vacuumizing, reducing in a reducing atmosphere, and cooling; and (5) after preheating, the copper alloy reduction blank is placed in a rotary forging die, rotary forging and air cooling are conducted, and the copper alloy is obtained. The high-strength plastic copper alloy is good in conductivity and mechanical property and high in plasticity. The method is simple in process, environmentally friendly, low in cost and suitable for industrial production.

The invention belongs to the technical field of fluorine chemical industry, and relates to preparation and application of a hydrodechlorination catalyst, a preparation method comprises the following steps: dipping a palladium source and a copper source on an activated carbon carrier, drying, and sequentially carrying out heating pretreatment in an inert atmosphere, reduction treatment in a hydrogen atmosphere and passivation treatment in an air atmosphere; in the obtained catalyst, the loading capacity of palladium on the activated carbon carrier is 0.5-0.1 wt%, and the loading capacity of copper on the activated carbon carrier is 5-0.1 wt%. Compared with the prior art, the preparation method has the advantages of low metal loading capacity, low reaction temperature, controllable product selectivity and the like, and the granular active carbon is adopted, so that the influence of active carbon extrusion molding and molding auxiliaries on preparation and performance of the catalyst can be avoided. Meanwhile, the catalyst can be used for the hydrodechlorination reaction of CFC-113, the problems of fast deactivation, poor stability and high use cost of the conventional catalyst can be solved, and an effective way is provided for converting fluorochloroalkane into fluorine-containing olefin.

The utility model discloses a reduction treatment system for oily sludge, and relates to the technical field of oily sludge treatment, an outlet of a feeding module is connected with an inlet of a conditioning module through a pipeline, and an outlet of the conditioning module is respectively connected with an inlet of a liquid-liquid separation module and an inlet of a solid-liquid separation module through pipelines; the liquid-liquid separation module adopts centrifugal separation, a residue water pump outlet of the liquid-liquid separation module is connected with an inlet of the solid-liquid separation module through a pipeline, an oil residue outlet of the liquid-liquid separation module is connected with an inlet of the conditioning module and the outside through pipelines, and a water pump outlet of the solid-liquid separation module is connected with the inlet of the conditioning module and the outside through pipelines. An oil pump outlet of the solid-liquid separation module is respectively connected with an inlet of the tempering module and the outside through pipelines, a solid phase outlet of the solid-liquid separation module is connected with the outside through pipelines, and valves are arranged on the pipelines. According to the utility model, the recycled oil does not contain a flocculating agent component, so that the equipment is not influenced during recycling.

The invention belongs to the technical field of preparation of electrolyzed water catalysts, and particularly relates to a preparation method and application of an anion intercalation r-Ru-NiFe-LDH catalyst. The foam iron is subjected to washing pretreatment and freeze drying; the preparation method comprises the following steps: putting foam iron into an alkaline aqueous solution of nickel salt, and carrying out hydrothermal reaction to obtain an anion intercalated NiFe-LDH precursor growing on the foam iron; and putting the anion intercalated NiFe-LDH precursor into a ruthenium chloride solution, carrying out hydrothermal reaction again, taking out, drying, and carrying out reduction treatment to obtain the anion intercalated ruthenium-loaded NiFe-LDH catalyst growing on the foam iron. The invention provides a new idea for research and development of a seawater electrolysis bifunctional catalyst with high activity and stability under high current density, and has a wide industrial application prospect.

The invention belongs to the technical field of amino acid detection, and relates to an electrode for identifying and detecting cysteine and application, the electrode is a glassy carbon electrode modified by vitamin B12 and subjected to electrochemical activation treatment; the electrochemical activation treatment comprises oxidation treatment and reduction treatment; the vitamin B12 modification method is an impregnation method and / or the electrolyte in the reduction treatment process contains vitamin B12, and modification is carried out in the electrochemical activation process. According to the invention, direct electric polarization of the molecular catalyst is realized, Cys can be effectively distinguished from sulfydryl of other similar structures, and interference of common electroactive compounds coexisting in a biological sample is eliminated; the super-hydrophilic surface endows the sensor with excellent biological pollution resistance; a new example is provided for electrochemical sulfydryl analysis, an important theoretical basis is provided for bionic interface engineering, and the method is expected to be applied to clinical diagnosis and on-site rapid detection; and a thought is provided for modification of other types of molecular catalysts such as Co-N4.

The invention relates to the technical field of composite metal materials, in particular to a silver-coated graphene copper composite material and a preparation method thereof, and aims at solving the problems that traditional silver-coated copper powder is high in silver consumption, copper is oxidized due to the fact that a silver layer is prone to being damaged, and conductivity is insufficient. The method comprises the steps that a graphene coating layer is formed on a copper powder substrate in situ through chemical vapor deposition, and graphene copper powder is obtained; performing etching treatment on the graphene copper powder to controllably expose part of the copper substrate so as to form anchoring points for silver ion deposition; carrying out reduction treatment on the etched graphene copper powder so as to ensure that an anchoring site has chemical activity; in a reductive liquid phase environment, enabling a chemical silver plating solution to react with the graphene copper powder subjected to reduction treatment, and guiding silver ion deposition by utilizing an anchoring point, so as to form a silver coating layer on the surface of the graphene coating layer; and separating and drying the reacted system to obtain the silver-coated graphene copper composite material. The material is better in oxidation resistance and conductivity, and the process is free of waste liquid.

The invention provides a method for regenerating the activity of an inactivated metal catalytic electrode, and belongs to the technical field of electrode regeneration. The method comprises the following steps: performing electrochemical oxidation-reduction treatment on an inactivated metal catalytic electrode to obtain an active regenerated metal catalytic electrode; the electrochemical oxidation reduction treatment comprises a cyclic voltammetry reduction method or a method for electrolytic reduction after pulse oxidation reduction. According to the method, the activity of the inactivated metal catalytic electrode is regenerated by adopting a cyclic voltammetry reduction method or an electrolytic reduction method after pulse oxidation reduction, so that the service life of the metal catalytic electrode in long-time reaction can be effectively prolonged.

The present invention provides a Fenton iron sludge treatment method and device, comprising the following steps: allowing the Fenton iron sludge to enter an iron reduction unit, undergoing reduction treatment under the action of dissimilatory iron-reducing bacteria, reducing the trivalent iron in the Fenton iron sludge to divalent iron through the reduction treatment to obtain reduced iron sludge; allowing at least a portion of the reduced iron sludge to enter a bioleaching unit, undergoing bioleaching treatment under the action of specific microorganisms to obtain a first mixed liquid; dehydrating the first mixed liquid to obtain an aqueous phase and dehydrated sludge, respectively; and returning the aqueous phase to the bioleaching system to participate in the bioleaching treatment. The present invention can solve technical problems existing in the prior art, such as the need for additional acid, the generation of a large amount of strongly acidic water, the susceptibility to environmental pollution, the inability to recycle iron, and high costs.

The invention discloses a preparation method of a bifunctional catalyst, the bifunctional catalyst and application, the preparation method comprises the following steps: (1) soaking an acidic functional component with an organic matter solution to obtain an acidic functional component precursor; (2) carrying out pre-reduction treatment on the dehydrogenation hydrogenation functional component to obtain a pretreated dehydrogenation hydrogenation functional component; and (3) kneading, molding, drying and roasting a mixture containing the acidic functional component precursor, the pretreated dehydrogenation and hydrogenation functional component, an auxiliary agent and a binder to obtain the bifunctional catalyst. The bifunctional catalyst disclosed by the invention has the characteristics of high conversion rate, good selectivity and excellent regeneration performance.

The invention belongs to the technical field of medical instruments, and particularly relates to a nursing sputum suction device for an intensive care unit, which comprises a left bottle, a right bottle, a gas transmission mechanism, a mounting frame and a reversing mechanism. In order to improve sputum suction efficiency and reduce discomfort of a patient, a single-tube conveying mode is adopted, sputum suction treatment and sputum reduction treatment can be carried out on the patient respectively, the number of tubes inserted into an affected part is reduced, meanwhile, the steps of tube pulling and inserting and sputum reduction treatment can be optimized when thick sputum is treated, the treatment time is shortened, and meanwhile the sputum suction efficiency is improved. The problems that a traditional sputum suction device cannot conduct sputum suction treatment and too many sputum suction treatment pipes are inserted into an affected part are solved, meanwhile, the adjustment mode of sputum suction and sputum suction is simple, only a coil magnet needs to be switched on and off, triggering judgment of a left trigger and a right trigger needs to be exchanged, medical staff can master the using method more quickly, working efficiency is improved, and the medical staff can conveniently use the sputum suction device. And precious time is saved.

The invention discloses a resource utilization method for source reduction of dioxin in fly ash, and belongs to the technical field of dioxin treatment, in the source reduction of the dioxin in the fly ash, a quadruple dioxin control technology is adopted for dioxin reduction treatment; the quadruple dioxin control technology comprises a low-temperature pyrolysis process, a high-temperature decomposition process, an online control process and an in-furnace inhibition process, dioxin is rapidly decomposed by combining two methods of low-temperature pyrolysis and high-temperature decomposition, two defense lines are set, the content of dioxin in the process is automatically monitored, and a dioxin inhibitor is used for controlling when the content exceeds a control value. Wherein the adopted dioxin inhibitor is a mixed inhibitor of a nitrogen source loaded molecular sieve and calcium hydroxide, so that the formation of dioxin can be inhibited, and the stability of the inhibitor can also be improved.

The invention discloses a preparation method of high-purity rhenium powder, and belongs to the field of metal processing.The method prepares a final product through first-stage gradient type high-temperature reduction treatment and second-stage low-temperature reduction treatment.The method is simple in production process, simple in manual operation step, low in production energy consumption, high in crystallinity of the produced product, low in oxygen content and suitable for industrial production. And the purity can reach 4N or above.