243 results about "Oil bath" patented technology

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention belongs to the technical field of fuel cell membrane electrode preparation, and particularly discloses a preparation method for improving fuel cell catalyst layer ionomer distribution, which comprises the following steps: placing a carbon nanotube in dilute nitric acid, carrying out uniform ultrasonic dispersion, then carrying out oil bath heating, carrying out continuous acidification treatment, then carrying out suction filtration, and drying to obtain a carbon nanotube catalyst layer; carbon nano tube powder subjected to acidizing treatment is obtained; mixing the acidized carbon nanotube powder with a Nafion solution in proportion, and removing a solvent through rotary evaporation to obtain a carbon nanotube-Nafion compound; mixing the carbon nanotube-Nafion compound with a commercial Pt / C catalyst, deionized water and ethanol in proportion, and performing ultrasonic treatment under an ice bath condition to obtain uniformly dispersed cathode catalyst slurry; and spraying the uniformly dispersed cathode catalyst slurry on the cathode side of the proton exchange membrane to obtain the catalyst layer for improving ionomer distribution.

The application provides a preparation method of a nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst. The method comprises the following steps: (1) stirring and mixing a nitrogen-doped carbon carrier with an alcohol solvent to obtain a uniformly dispersed system A; (2) uniformly mixing a metal precursor with an alcohol solution by ultrasonic mixing to obtain a uniformly dispersed system B; (3) uniformly stirring and mixing the system A and the system B, then performing oil bath heating, and then performing washing and drying to obtain a nitrogen-doped carbon-supported platinum-cobalt alloy; and (4) placing the product obtained in step (3) into a porcelain boat, annealing the product in an inert atmosphere at a high temperature, and cooling the product to room temperature to obtain the nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst. The nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst prepared by the method has a uniform particle distribution and exhibits good catalytic activity and stability in an oxygen reduction reaction (ORR) of a fuel cell.

The invention relates to a preparation method of a trace Fe optimized Ru nano-catalyst and application of the trace Fe optimized Ru nano-catalyst in hydrodechlorination reaction of parachlorophenol. The preparation method comprises the following specific steps: firstly, dissolving ruthenium chloride hydrate and ferric trichloride into ethylene glycol, adding PVP (Polyvinyl Pyrrolidone) into the solution, fully mixing, adjusting the pH value of the solution to 3-4, transferring into a glass bottle, and heating and reacting in an oil bath pan at 180 DEG C; and centrifuging, washing and drying the obtained product to obtain a black powdery solid, namely the Ru-Fe nano-catalyst. The hydrodechlorination process is carried out in a double-chamber electrolytic tank separated by a Nafion 117 membrane, an electrolyte is a Na2SO4 solution, a Ru-Fe electrode taking carbon cloth as a carrier is used as a working electrode, a Pt sheet is used as a counter electrode, and an Ag / AgCl electrode is used as a reference electrode. The Ru-Fe nano-catalyst provided by the invention has the advantages of stable structure, uniform metal distribution and excellent electron synergistic effect, and can efficiently catalyze hydrodechlorination of p-chlorophenol and generate cyclohexanol. The preparation process is simple, convenient and environment-friendly, has a good industrial application prospect, and is particularly suitable for green treatment and resource conversion of chlorine-containing organic wastewater.

The application provides a preparation method of a SERS substrate of a zirconium-based MOF-808 / AuNPs. The method comprises three steps: in the first step, an AuNPs solution is prepared by using deionized water, chloroauric acid and sodium citrate to perform an oil bath reaction to obtain the AuNPs solution; in the second step, MOF-808 is prepared by mixing zirconium chlorohydrate, 1,3,5-benzene tricarboxylic acid, N,N-dimethylformamide and formic acid, and then performing a hydrothermal reaction on the mixed solution, centrifuging and vacuum drying to obtain activated MOF-808-Zr powder; in the third step, the activated MOF-808-Zr powder is dissolved in anhydrous ethanol, and then fully stirred and mixed with AuNPs solutions of different amounts to form a zirconium-based MOF-808 / AuNPs solution; and in the fourth step, the zirconium-based MOF-808 / AuNPs solution is poured into sample boxes containing silicon substrates, and the silicon substrates are immersed, and after drying, a SERS substrate of the zirconium-based MOF-808 / AuNPs is obtained. The method has the advantages of simple preparation process, low cost, good uniformity of the prepared substrate, good signal repeatability, high sensitivity, good structural stability and the like.

A work machine motor drive assembly according to the present invention comprises a motor, a fixed case, a high-speed rotation mechanism, a housing, and a low-speed rotation mechanism. The fixed case includes a first internal space and a lubricating oil passage. The lubricating oil passage supplies lubricating oil to the first internal space. The high-speed rotation mechanism is provided in the first internal space. The high-speed rotation mechanism is connected to the motor. The high-speed rotation mechanism is lubricated via a dry sump system by the lubricating oil supplied through the lubricating oil passage. The housing includes a second internal space in which lubricating oil is sealed. The housing is rotatably supported by the fixed case. The low-speed rotation mechanism is provided in the second internal space. The low-speed rotation mechanism reduces the speed of rotation by the high-speed rotation mechanism and transmits the rotation to the housing. The low-speed rotation mechanism is lubricated by an oil bath of the lubricating oil in the second internal space.

The invention discloses a preparation method of a superfine PtIr nanowire catalyst for ammoxidation. The preparation method comprises the following steps: firstly, fully dissolving platinum acetylacetonate, iridium acetylacetonate, tungsten hexacarbonyl and dodecyl trimethyl ammonium bromide in oleylamine to obtain a light yellow solution; carrying out ultrasonic treatment on the obtained light yellow solution until the solution is fully dissolved; and heating the obtained uniform light yellow solution to 190 DEG C in an oil bath, keeping the temperature for 5 hours, centrifuging, washing and drying to obtain the superfine PtIr nanowire catalyst. The nanowire structure has a high specific surface area and abundant active sites, and is beneficial to effective quality and electron transmission. Through alloying of Ir and Pt, the electronic structure on the surface of the catalyst is changed, and the poisoning probability is effectively reduced. Meanwhile, the adsorption and activation process of ammonia molecules is optimized through the synergistic effect between Pt and Ir, the reaction activation energy is reduced, and the reaction rate is remarkably increased. The catalyst not only has remarkable ammonia oxidation catalytic performance, but also is good in stability and simple in preparation process.

The application relates to a synthesis method of a positive electric three-component covalent organic polymer and application thereof, and belongs to the technical field of sewage treatment. The method is as follows: 1,3,5-benzene triformylhydrazine is dissolved in an organic solvent dimethyl sulfoxide to obtain a solution A; 1,3-diamino guanidine hydrochloride is dissolved in the solution A to obtain a solution B; 2,3,5,6-tetrafluoro-p-xylene dicarboxaldehyde is dissolved in the solution B to obtain a solution C, and the preparation of the solutions is carried out in a constant-temperature oil bath; then, the orange wet gel is obtained by heating at 100 DEG C for 30s; the orange wet gel is placed in a dialysis bag for dialysis, the mixture is taken out for freezing, and then the freezing drying is carried out under vacuum to obtain the positive electric three-component covalent organic polymer. The synthesis method is simple, high in yield and fast in speed, the specific surface area of the positive electric three-component covalent organic polymer is large, the positive electric three-component covalent organic polymer has a hierarchical porous structure and rich reaction active sites, and can be used as a high-efficiency adsorbent to remove perfluorooctanoic acid in water.

The invention discloses a method for preparing phenyl acetate with high selectivity. A phosphoric acid solution is added into a magnesium chloride solution, stirring and heating are performed to obtain a suspension, the suspension is dried to constant weight to obtain a white solid, the white solid is ground to obtain powder, and the powder is calcined to obtain the catalyst. Then mixing phenol and a catalyst, placing the mixture in an oil bath for reflux reaction, dropwise adding acetic anhydride, distilling after the reaction is finished, and collecting a fraction at 190-195 DEG C, namely phenyl acetate. According to the magnesium chloride loaded phosphoric acid type catalyst (MgCl2-H3PO4) prepared by the method disclosed by the invention, phenol and acetic anhydride react without a solvent, MgCl2-H3PO4 is a solid catalyst, can be recycled only by filtering and can be repeatedly used after being washed, and MgCl2-H3PO4 also improves the selectivity of phenyl acetate and reduces the production cost.

This invention discloses a highly selective method for preparing triethylenetetramine. The method uses 2-chloroethylamine hydrochloride and ethylenediamine as raw materials, reacting them in an aqueous solution. An aqueous solution of ethylenediamine with a concentration of 1-100 wt% is added dropwise to an aqueous solution of 2-chloroethylamine hydrochloride with a concentration of 1-100 wt%. The dropping rate of the ethylenediamine solution is 5% to 100% of its own mass per hour. The reaction temperature is 30-200 °C (oil bath temperature), and the reaction time is 2-20 hours (including the dropping time). The molar ratio of 2-chloroethylamine hydrochloride to ethylenediamine is 2:1 to 40:1. This invention is the first to propose a direct synthesis of triethylenetetramine from the bulk chemicals 2-chloroethylamine hydrochloride and ethylenediamine. Compared with the previously reported dichloroethane amination method and the nucleophilic substitution method between dichloroethane and ethylenediamine, this method offers milder reaction conditions, simpler operation, and higher selectivity, making it suitable for industrial production.

The application provides a rotating machine. The rotating machine comprises a rotor, a bearing and a lubricating device. The rotor comprises a rotating shaft. The bearing is sleeved on the rotating shaft and is used for supporting the rotation of the rotor. The lubricating device comprises an oil bath structure, an oil injection structure and an oil path control device. The oil bath structure comprises a lubricating cavity and a first oil delivery flow path. The lubricating cavity is communicated with a bearing cavity of the bearing. The first oil delivery flow path is configured to deliver oil into the lubricating cavity. The oil injection structure comprises a second oil delivery flow path. The second oil delivery flow path has an oil injection port at the end. The oil injection port is configured to inject oil to the bearing. The oil path control device is configured to control the opening and closing of the first oil delivery flow path and the second oil delivery flow path. The rotating machine is beneficial to high-efficiency lubrication of the bearing at various rotating speeds, and has higher operation efficiency and reliability.

The utility model relates to a pipe frame, which comprises a frame main body and a cover body, the frame main body comprises a top layer plate and a bottom layer plate, and the top layer plate is provided with at least one through hole through which a pipe container can pass; the bottom-layer plate is positioned below the top-layer plate and is spaced from the top-layer plate; the bottom layer plate is provided with at least one bearing part, one bearing part is correspondingly arranged below one via hole, and the bearing parts are used for bearing the bottom of the pipe container; the cover body at least has a closed position and an open position relative to the top layer plate; when the cover body is located at the closed position, the cover body covers the top layer plate and applies pressure to the top of the pipe container so that the pipe container can be fixed to the frame body. And when the cover body is at the opening position, the cover body relieves the limitation of the pipe container, and the pipe container can be taken away from the rack main body. When the rack main body is placed in a liquid such as a water bath or an oil bath for heating, the cover body at the closed position can be used for pressing the floating pipe container, so that the experiment effect is ensured.

The invention relates to the technical field of food safety and adsorbents, in particular to a metal organic framework patulin adsorbent and a preparation method and application thereof.The metal organic framework patulin adsorbent contains a sulfhydrylation metal organic framework UiO-66-SH and is specifically prepared through the following steps that ZrCl4 is taken and dissolved in N, N-dimethylformamide (DMF), glacial acetic acid is added, and ultrasonic dissolution is conducted; then adding 2, 5-dimercaptoterephthalic acid into the solution, and carrying out ultrasonic dissolution; the preparation method comprises the following steps: adding UiO-66-SH into a reaction kettle, carrying out magnetic stirring in an oil bath pan, carrying out centrifugation to remove a supernatant after a reaction is finished, and sequentially washing a precipitate with DMF, absolute ethyl alcohol and deionized water to obtain a light yellow precipitate, namely UiO-66-SH. The common problems of MOF pore blockage, great reduction of specific surface area, structural damage and the like in a traditional post-modification method are avoided through a one-step direct synthesis method, the synthesized UiO-66-SH is more efficient, stable, safe and free of residues, the adsorption capacity to PAT reaches up to 18.209 mu g / mg, and main nutritional ingredients in fruit juice are not obviously influenced.

The invention belongs to the field of novel functional polymer materials, and discloses a preparation method of a selenium-containing polymer material capable of fixing metal ions, and the preparation method comprises the following steps: S1, adding PTMEG into a round-bottom reaction flask filled with inert gas, and placing the round-bottom reaction flask in an oil bath pan for melting; s2, MDI, dimethylglyoxime, DSe and anhydrous N, N-dimethylacetamide are sequentially added and fully mixed; s3, stannous octoate and CuCl2 are added at the same time; s4, keeping the temperature of the oil bath pan and continuously reacting; s5, after the reaction is finished, a polymer is precipitated out, and secondary cleaning is conducted through methyl alcohol. The preparation method has the advantages that oximido is introduced into a polyurethane molecular structure to fix metal ions, meanwhile, selenium is introduced in a covalent fixation mode, and through double-site introduction of the metal ions and the selenium, the molecular structure of the polyurethane is greatly improved; the NO catalytic release rate of the material can be regulated and controlled, so that the biocompatibility and applicability of the polymer material in a blood environment are improved, and the application scene is further widened.

The invention discloses a bismuth-antimony-tin alloy negative electrode material of a potassium ion battery and a preparation method of the bismuth-antimony-tin alloy negative electrode material, and belongs to the technical field of new energy. The preparation method comprises the following steps: firstly, obtaining bismuth-antimony-tin alloy precursor powder by adopting an oil bath evaporation drying method, then putting the bismuth-antimony-tin alloy precursor powder into a tubular furnace, carrying out heat treatment under a protective atmosphere, and washing and drying to obtain the bismuth-antimony-tin-carbon composite material. The middle entropy property of the ternary alloy enables the structural stability of the material to be improved, three-dimensional carbon coating can relieve volume expansion of alloy particles in the circulation process, and the circulation stability of the composite material is improved.

The utility model belongs to the technical field of engineering machinery, disclose a kind of loader oil bath air filter pipeline of increasing driving rear field of view, including integrally formed hose, its one end is communicated with the air outlet of oil bath air filter, another end is communicated with engine air inlet;Integrally formed hose profile is smooth curve, it is set in the inside of bonnet, highest point is lower than driver's cab floor plane.The utility model increases driver rear field of view, simplifies installation process, improves waterproof performance.

The application discloses a motor for coiled tubing and a use method thereof. The motor comprises an external shell and an internal transmission component installed in the external shell. The external shell is composed of a short section, a power shell, a winding shaft shell, a transmission shaft shell and an end sleeve which are sequentially screwed together. The internal transmission component is composed of a rotor, a winding shaft and a transmission shaft which are sequentially screwed together. A rubber stator corresponding to the rotor is fixedly installed in the power shell. An upper compensating sleeve is installed between the winding shaft shell and the winding shaft. A lower compensating sleeve is installed between the end sleeve and the transmission shaft. A roller bearing assembly and an oil bath type bearing assembly are respectively installed between the transmission shaft shell and the transmission shaft. The motor assembly is simultaneously increased with the stator and the rotor, so that the rotor outputs a lower rotating speed to the transmission shaft, thereby driving the fishing tool connected to the lower part of the transmission shaft to rotate and guiding the fish head into the fishing tool.

This invention discloses a room-temperature phase pyroelectric material and its preparation method, relating to the field of pyroelectric material technology, with the chemical formula C4H. 14 N₂OPbCl₄ is prepared as follows: 2-Dimethylaminoethylamine is cooled and stirred in an ice-water bath, then hydrogen peroxide solution is added dropwise while stirring. After the reaction, the resulting reaction solution is vacuum dried to obtain the nitrogen oxide of 2-dimethylaminoethylamine. The nitrogen oxide of 2-dimethylaminoethylamine and lead chloride are added to a concentrated hydrochloric acid solution, heated in an oil bath, and stirred to obtain a pyroelectric material. The pyroelectric material of this invention has a perovskite structure and undergoes a reversible phase transition reaction at a phase transition temperature of 27°C. During the phase transition, a current is generated at the polar axis of the crystal. The phase transition temperature at room temperature allows the pyroelectric material to operate within a relatively stable temperature range, providing reliable energy collection performance and showing great application value in waste heat utilization, self-sustaining systems, and other fields.

A preparation method of a three-dimensional self-supporting phenolic resin derived carbon (at) carbon nanotube sponge comprises the following steps: step 1, injecting a ferrocene and dichlorobenzene carbon source solution into a reaction furnace in a hydrogen / argon mixed atmosphere to obtain a carbon nanotube sponge; step 2, dissolving resorcinol and hexamethylenetetramine in the deionized water; cutting a carbon nanotube sponge into proper small blocks, putting the small blocks into the mixed solution, transferring the small blocks into an oil bath pan, carrying out stirring heat treatment / autoclave heat treatment for a period of time, standing overnight, and cooling to room temperature, so as to obtain resorcinol and hexamethylenetetramine prepolymer coated carbon nanotube sponge; step 3, taking out the resorcinol and hexamethylenetetramine prepolymer coated carbon nanotube sponge, washing, and then freeze-drying to maintain the three-dimensional porous network structure; and finally, carrying out high-temperature annealing treatment to obtain the three-dimensional self-supporting phenolic resin derived carbon-coated carbon nanotube sponge. The integrated self-supporting composite electrode is successfully constructed through a three-dimensional network in-situ synthesis process.

This invention discloses a high-cycle adsorption-desorption fuel vapor activated carbon adsorbent and its preparation method. The preparation method includes: mixing biomass raw materials, phosphoric acid, and high-nitrogen substances in a certain proportion; stirring in a mixer at an oil bath temperature of 230°C until slightly matured; dispersing the matured mixture using a dispersion device; activating it in an externally heated activation converter by introducing a mixture of nitrogen and hydrogen gas; rinsing the activated mixture and recovering the phosphoric acid to obtain high-nitrogen activated carbon; drying the high-nitrogen activated carbon; grinding the high-nitrogen activated carbon; mixing carbon powder and gel in a mass ratio of 2:1 to maintain the moisture content of the mixture at 30%; granulating using a screw granulator; and drying and solidifying the obtained granules. This invention improves the activated carbon adsorbent by reducing the proportion of hydrophilic oxygen-containing functional groups, increasing the hydrophobicity of the activated carbon, and thus extending its service life.

The invention discloses a defect-engineered nanosheet material for an alkaline aqueous battery as well as a preparation method and application of the defect-engineered nanosheet material, and belongs to the technical field of nano materials and electrochemical energy storage. The method comprises the following steps: firstly, dissolving 1, 3, 5-benzene tricarboxylic acid and bismuth nitrate pentahydrate in methanol, and carrying out hydrothermal reaction to obtain a bismuth-based metal-organic framework precursor; and then dispersing the precursor and ammonium halide in deionized water, and carrying out ion etching reaction through oil bath heating to obtain the bismuth oxyhalide nanosheet material. The prepared material has a self-supported hierarchical porous nanosheet structure, the surface of the material has wrinkles and pore channels, and the material contains oxygen vacancies and low-valence bismuth defects. The material can be used as a negative electrode to be applied to an alkaline aqueous battery, and after the material, a positive electrode material and alkaline electrolyte are assembled into a battery, the battery has high specific capacity, excellent rate capability and good cycle stability. The preparation method is simple in process and mild in condition, and the material performance can be optimized by adjusting etching parameters.

The application discloses a kind of carolic acid and preparation method thereof, and specifically relates to the field of medical technology.The method comprises the following steps: stirring catalyst H2WO4 / C with hydrogen peroxide, then adding dichloro chrysanthemic acid ethyl ester; oil bath heating is carried out, reaction temperature is controlled, repeated reflux is carried out, and oxidation reaction is carried out; after the reaction, homogeneous transparent solution is filtered, extracted, and subjected to reduced pressure distillation to obtain carolic acid product.In the application, when catalyzing and oxidizing dichloro chrysanthemic acid ethyl ester, a high-activity H2WO4 / C heteropoly acid is used as a catalyst, the reaction scheme is optimized, the selectivity of the reaction is greatly improved, the number of cycles of the catalyst is increased, and after 20 cycles of the new catalyst, the catalyst activity does not decrease obviously.Furthermore, due to the great improvement of selectivity, the loss of product is reduced, and the yield is improved.

The invention discloses a preparation method of an MXene modified TiO2 / Cd0. 3Zn0. 7S heterojunction composite photocatalyst for hydrogen production through visible light photolysis of water. The MXene modified TiO2 / Cd0. 3Zn0. 7S heterojunction composite photocatalyst is used for hydrogen production through visible light photolysis of water. The preparation method comprises the following steps: etching an MAX phase (Ti3AlC2) by hydrofluoric acid to prepare Ti3C2 MXene, growing TiO2 nanosheets in situ by utilizing a hydrothermal oxidation technology, anchoring the TiO2 nanosheets on the surface of the Ti3C2 MXene to form a Ti3C2-coated TiO2 composite material, and heating and loading Cd0. 3Zn0. 7S nanoparticles in an oil bath to prepare the final composite photocatalyst. The preparation method is simple, mild in condition and low in cost, and a surfactant or a template agent does not need to be added. The prepared composite photocatalyst has excellent photocatalytic water decomposition hydrogen production performance, the hydrogen evolution rate reaches up to 48.92 mmol.g <-1 >. H <-1 > and is improved by 43.67 times and 99.83 times respectively compared with pure Cd0. 3Zn0. 7S and Ti3C2 at TiO2, the cycling stability is good, the activity is kept at 95% or above after four times of cycling, and the apparent quantum efficiency at 420 nm reaches 74.6%. The invention provides a new thought for a high-efficiency photocatalytic system, and is suitable for the fields of solar energy conversion and environment purification.

This invention relates to the field of low-temperature coating thermoforming stamping technology, and provides an oil bath stamping equipment and process, including: a chassis; a frame body, the frame body being fixedly installed on the top of the chassis, the frame body having a cavity for containing stamping oil inside; and a stamping die, the stamping die being installed in the cavity of the frame body. By placing the stamping process in an oil bath environment, the fluid isolation and lubrication effects of the stamping oil are utilized to effectively protect the low-temperature coating on the sheet metal surface, avoiding melting, peeling, and oxidation of the coating during high-temperature stamping. The stamping oil isolates air, eliminating the generation of oxide scale at the source, resulting in clean parts surfaces after stamping, eliminating the need for shot blasting, simplifying the production process, and reducing costs. The stamping oil circulation temperature control system realizes the recycling and precise temperature control of the stamping oil, ensuring the stability and consistency of process parameters and improving product quality.

The invention relates to the technical field of fluorescent dye preparation, in particular to an organic fluorescent dye and a preparation method thereof.The preparation method comprises the following steps that m-diethylaminophenol and Meldrum's acid are catalyzed in an ethanol-water solvent through a supported catalyst and stirred to react in an oil bath, and an intermediate is obtained through acidification crystallization after cooling; and heating the intermediate, anhydrous potassium carbonate and ethyl iodoacetate in N, N-dimethylformamide under the protection of nitrogen to carry out alkylation reaction, and carrying out recrystallization, saponification hydrolysis and purification on the reaction liquid to obtain the organic fluorescent dye coumarin 343. The supported catalyst prepared by the invention shows good catalytic performance, stability and recoverability in the preparation reaction of the organic fluorescent dye.

This invention discloses a disc-shaped semi-steel vertical roller and its preparation method, belonging to the field of semi-steel roller technology, and solves the problems of difficult-to-achieve hardness and uneven hardness in existing disc-shaped semi-steel vertical rollers. The preparation method of the disc-shaped semi-steel vertical roller includes: holding at the blue brittleness temperature range; holding at 650-700℃ for 5-10 hours; holding at 850-900℃ for 6-15 hours; removing the disc-shaped semi-steel vertical roller forging and air-cooling for 10-15 minutes; then immersing the entire disc-shaped semi-steel vertical roller forging in an oil bath for circulating oil cooling until the surface temperature of the disc-shaped semi-steel vertical roller forging reaches 200±10℃, and then immediately removing it from the oil; holding at the bainitic transformation temperature; holding at 500-600℃; cooling to 400±10℃; cooling to below 120℃; then removing it from the furnace and air-cooling to obtain the disc-shaped semi-steel vertical roller; the disc-shaped semi-steel vertical roller prepared by the method of this invention has high hardness and good hardness uniformity.

The application belongs to the technical field of catalyst preparation, and relates to a preparation method and application of a CoCuNiPtRu high-entropy alloy nanoparticle catalyst. A one-pot wet chemical method is used to uniformly mix 4-amino pyridine solvent and metal precursors, and then ascorbic acid is quickly added for reduction in an oil bath at 95 DEG C. After reaction, washing and drying, the catalyst is obtained. The method has the advantages of simple process and convenient operation. The obtained catalyst has high activity and selectivity in catalytic degradation of polylactic acid waste plastics under alkaline conditions, can efficiently upgrade and convert the polylactic acid waste plastics into acetic acid, provides a new way for resource utilization of waste plastics, and has good environmental protection and resource recycling prospects.

The invention relates to a preparation method and application of a CoO-CdO composite material micro-nano motor, and belongs to the technical field of metal oxide heterostructure composite materials. The preparation method specifically comprises the following steps: adding potassium sulfate into an aqueous solution of cobalt nitrate hexahydrate, urea and cadmium nitrate tetrahydrate, uniformly stirring in an oil bath, transferring the mixed solution into a reaction kettle, carrying out constant-temperature reaction, washing, drying and calcining to obtain the product micromotor. The special lamellar spherical micromotor is prepared through a hydrothermal method, the micromotor is high in power and rapid in driving under low-concentration hydrogen peroxide, the driving speed can reach about 330 [mu] m / s, the micromotor can efficiently degrade tetracycline, and the micromotor is wide in activity range and high in efficiency. High-power bubble driving has a wide application prospect in the aspect of efficiently degrading organic pollutants in a water body.

The invention belongs to the technical field of catalyst preparation, takes a high-entropy alloy nanowire catalyst as a research core, and mainly explores a preparation mode and practical application of an AuCuAgPtPd catalyst. A one-pot wet chemical method is applied in a breakthrough mode, firstly, a 4-aminopyridine solvent and metal precursors of gold, copper, silver, platinum and nickel are fully and evenly mixed, then the mixed solution is placed in an oil bath pot at the temperature of 95 DEG C, then a reducing agent ascorbic acid is rapidly added, after a specific reaction time, washing, drying and other procedures are carried out in sequence, and the gold, copper, silver, platinum and nickel composite material is obtained. And the high-entropy alloy nanowire AuCuAgPtPd catalyst can be successfully prepared by using the method provided by the invention. The preparation method disclosed by the invention has the outstanding characteristics of simple flow, simple steps, simplicity and convenience in operation and the like. Under the alkaline condition, the prepared nanowire-shaped high-entropy alloy AuCuAgPtPd catalyst shows excellent catalytic activity and selectivity in the aspect of catalytic degradation of waste plastic polylactic acid, the waste plastic can be efficiently upgraded and converted into acetic acid, a new path is developed for resource utilization of the waste plastic, and the method is suitable for industrial production. The method has a wide application prospect in the fields of environmental protection and resource recovery.

The utility model relates to the technical field of motors, in particular to a hollow cup brush motor and gear motor system, which comprises a casing, two bearings, a stator assembly and an armature cup assembly, a first mounting hole and a second mounting hole are correspondingly arranged at the closed ends of a cover body and the casing, and the two bearings are respectively mounted in the first mounting hole and the second mounting hole. A first mounting gap is formed between the peripheral side of the coil cup and the inner wall of the mounting cavity, the commutator is inserted into one end, close to the cover body, of the coil cup, the rotating shaft penetrates through the stator assembly and the commutator, the two ends of the rotating shaft are rotationally connected to the two bearings respectively, and at least one end, close to the cover body, of the rotating shaft is an open bearing; and the first mounting gap is communicated with the external working environment. When the hollow cup brush gear motor works in an oil bath environment, the pressure inside and outside the motor can be kept balanced, the running state without pressure difference is achieved, the working load is reduced, the working efficiency is improved, and the service life is prolonged.