24results about How to "Simple process equipment" patented technology

The invention discloses a phosphate functionalized silicon-based solid adsorbent and application thereof, and belongs to the technical field of yttrium separation and purification, a preparation method comprises the following steps: step 1, synthesizing silicon-based resin particles SiO2-P by using spherical porous silicon dioxide as a solid-phase carrier and styrene as a raw material through an in-situ polymerization technology, and 2, synthesizing the phosphate-functionalized silicon-based solid adsorbent HDEHP / SiO2-P by using di (2-ethylhexyl) phosphate HDEHP as a raw material and utilizing a vacuum impregnation technology. Therefore, the phosphate functionalized silicon-based solid adsorbent and the application thereof are adopted in the invention. The phosphate can specifically and selectively extract trivalent yttrium ions, so that efficient separation of yttrium and strontium is realized, high-purity yttrium can be obtained through separation and purification after elution, and a solid adsorbent can be recycled.

The invention discloses a modified asphalt-based hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of sodium ion batteries. The method comprises the following steps: performing crushing treatment on asphalt to obtain crushed asphalt, and performing pre-oxidation treatment in an air atmosphere to obtain oxidized asphalt; mixing and reacting a mixed gas composed of a carbon source gas and an organic gas with the oxidized asphalt by adopting a gas phase coating method to obtain a hard carbon precursor; and calcining and carbonizing the hard carbon precursor in an inert atmosphere, and cooling to obtain the modified asphalt-based hard carbon negative electrode material. According to the preparation method disclosed by the invention, the pitch is pre-oxidized and then is subjected to vapor deposition coating, and the amorphous carbon coated pitch-based hard carbon improves the pore structure of the surface, so that active sites, in contact with electrolyte, of the material surface are reduced, and the first coulombic efficiency and reversible capacity of the battery are effectively improved.

The invention discloses a process for producing carbon black raw oil by using catalytic slurry oil and catalytic cycle oil. The preparation method comprises the following steps: adding catalytic cycle oil into catalytic slurry oil, fully mixing to form blend slurry oil, and then carrying out sedimentation and solid removal treatment on the blend slurry oil to obtain carbon black raw oil; wherein the mass ratio of the catalytic slurry oil to the catalytic circulating oil is (80-95): (5-20); the settling solid removal treatment mode is that an oil slurry deliming agent is used for deliming treatment, and the adding proportion of the oil slurry deliming agent is 0.02%-0.1% of the mass of the catalytic oil slurry. According to the invention, the purpose of producing the carbon black raw oil by using the catalytic slurry oil is realized, the product quality meets the index requirements of GB / T41957-2022 Carbon Black Raw Oil Petroleum Refining Catalytic Slurry Oil, and the production process is simple and feasible.

A method for preparing a charged hydrogel polyamide double network reverse osmosis membrane, which relates to a method for preparing a reverse osmosis membrane. The purpose of the present invention is to solve the problem that the reverse osmosis membrane prepared by the existing method has multiple-step reactions and insufficient binding force of different structural and effective layers. The present invention constructs a charged hydrogel polyamide double network layer on the membrane surface through an interface-initiated free radical polymerization reaction, and enhances the electrical properties of the membrane through the presence of the charged hydrogel, thereby limiting the dissolution of ions in the water on the membrane surface and the diffusion of ions in the membrane, thereby reducing the number of ions passing through the membrane. At the same time, the hydrogel improves the hydrophilicity of the membrane, which is beneficial to the transmission of water molecules in the membrane and the improvement of the anti-pollution performance of the membrane. Method: 1. Prepare a polymer solution; 2. Prepare a reverse osmosis membrane; 3. Clean the membrane. The double network reverse osmosis membrane prepared by the present invention has a wide and uniform distribution of charged groups, which is beneficial to the efficient separation of salt and water. The present invention can obtain a charged hydrogel polyamide double network reverse osmosis membrane.

This invention discloses a method for increasing the hydrophilicity of titanium / titanium alloy dental implants using an electrochemical approach, comprising the following steps: S1, pretreating the titanium / titanium alloy dental implant to obtain a pretreated titanium / titanium alloy dental implant; S2, sandblasting and drying the pretreated titanium / titanium alloy dental implant obtained in S1 to obtain a treated titanium / titanium alloy dental implant; S3, acid etching the treated titanium / titanium alloy dental implant obtained in S2 to obtain an acid-etched titanium / titanium alloy dental implant; S4, electrochemical activation treatment to obtain an activated titanium / titanium alloy dental implant; S5, continuously rinsing the activated titanium / titanium alloy dental implant obtained in S4 with purified water for 20 seconds and drying it in a vacuum drying oven. This invention uses cyclic voltammetry (CV) electrochemically to activate the titanium / titanium alloy implant, thereby enhancing its hydrophilicity.

The present application belongs to the technical field of mineral processing, and particularly relates to a method for recovering manganese by suspending roasting of manganese nodule. The manganese nodule is crushed and magnetically separated, and then reduced and roasted, so that the strong magnetic mineral in the finely ground product is separated, and manganese concentrate is obtained. The present application has the characteristics of simple process equipment, low processing cost, small environmental pollution, low investment and operation cost, and high manganese recovery rate. The roasting product of the intermediate product can be used as a raw material for smelting manganese-iron alloy, and the final product manganese concentrate can be used as a raw material for smelting metallic manganese.

The application provides a reactor for producing phosphorus trifluoride, which comprises an automatic weighing and mixing unit and a reaction unit arranged in sequence. The reactor adopts one-step method to complete the reaction, and the process equipment is relatively simple and the production cost is low compared with the prior art. Furthermore, the device of the application adds molecular sieves for dehydration into dichloromethane, and the content of the molecular sieves is greater than the theoretical amount of the molecular sieves for dehydration of the dichloromethane, so that the side reaction caused by water can be greatly reduced, and the yield of the reaction is improved.

The invention discloses polymethylsilane capable of regulating and controlling the C / Si atomic ratio and a preparation method and application thereof.The preparation method comprises the steps that metal sodium is cut and crushed, and metal sodium fragments are obtained; adding the metal sodium fragments into an organic solvent, and heating until the metal sodium is in a molten state to obtain a mixture; stirring and cooling the mixture to obtain a sodium sand mixture; mixing methyl dichlorosilane, allyl methyl dichlorosilane, tetrahydrofuran and 15-crown ether-5, and then dropwise adding the mixture into the sodium sand mixture to react; the sodium sand in the preparation method has the characteristics of uniform particle size, high activity and clean surface; tetrahydrofuran and 15-crown ether-5 are added into dichloromethylsilane and allyl methyldichlorosilane, so that the single electron transfer rate of metallic sodium to dichloromethylsilane can be increased, the reaction activation energy can be reduced, the reaction efficiency can be improved, the molecular structure can be optimized, the loss of carbon elements can be made up, and the problem that PMS is rich in silicon after pyrolysis can be solved.

The application discloses a kind of purple pasture's composite bacteria anaerobic fermentation preparation method of livestock and poultry feed, belong to livestock and poultry green feed preparation technical field.The present application aims at solving the problems of poor specificity of existing pasture fermentation technology, large fluctuation of fermentation period, and the problem that the nutritional and biological activity advantages of purple pasture cannot be fully utilized.The fresh purple pasture is adjusted to the appropriate moisture content after pretreatment, inoculated with self-prepared multi-strain synergistic composite bacteria suspension, and then anaerobic fermentation is carried out after adding an appropriate amount of nutritional adjuvant, compacting and sealing.The fermentation time is controlled according to the environmental temperature of different seasons, and the finished product is obtained after natural airing and crushing after fermentation.The present application significantly improves the crude protein content of feed and reduces the crude fiber content through the synergistic effect of multi-strains, and the fermentation period is stable and controllable.The feed is palatable and rich in probiotics, which can effectively improve the growth performance of livestock and poultry, reduce the diarrhea rate, and has simple process and low cost, suitable for large-scale popularization and application.

The invention relates to the field of semiconductor materials, in particular to a preparation method of a titanium dioxide-calcium carbonate composite photocatalytic material, which comprises the following steps: step 1, polishing and cleaning the surface of a pure titanium sample, removing oil stain and an oxide layer on the surface, and drying for later use; 2, the pure titanium sample treated in the step 1 serves as an anode of a micro-arc oxidation reaction, a stainless steel electrolytic cell serves as a cathode, electrolyte is added into the stainless steel electrolytic cell, the micro-arc oxidation reaction is conducted, and a porous titanium dioxide structure is prepared; step 3, cleaning and drying the porous titanium dioxide structure for later use; 4, the micro-arc oxidation sample treated in the step 3 is put into a mixed reaction solution of deionized water, Na2CO3 and Ca (NO3) 2 to be subjected to centrifugal oscillation for 10-20 min, cleaning and drying are conducted after the reaction is completed, and the titanium dioxide-calcium carbonate composite structure is prepared. The preparation method provided by the invention reduces waste emission and energy consumption, and better meets the requirements of environmental protection and energy conservation.

This invention discloses a perovskite fluorescent patterning device and method based on laser-induced dehydration phase transition, belonging to the field of perovskite material laser processing technology. Addressing the problems of existing laser ablation damaging film integrity, difficulty in eliminating background fluorescence interference, and lack of mechanisms for multi-level grayscale control, this invention provides a hydrated perovskite precursor film that is transparent and fluorescence-free in the visible light band. Under ambient humidity conditions not exceeding 50% RH, the film is locally irradiated with an ultrafast laser. Utilizing water molecules in the film's own hydration structure, laser-induced local dehydration and inorganic framework rearrangement are achieved, directly writing perovskite phase transition patterns with multi-level fluorescence grayscale onto the transparent, fluorescence-free film.

The invention relates to the field of refractory materials, and discloses a high-purity alumina lightweight aggregate and a preparation method thereof. The aggregate is prepared from alumina micro powder with a specific particle size ratio: 50-60 wt% of micro powder with the particle size of 70-115 [mu] m, 20-30 wt% of micro powder with the particle size of 20-36 [mu] m and 10-20 wt% of micro powder with the particle size of 2.5-5 [mu] m, and each micro powder needs to meet the conditions that the content of alpha-Al2O3 is greater than or equal to 99.6% and the content of Na2O is less than or During preparation, water, the foaming agent, the foam stabilizer, the binding agent, the dispersing agent and the sintering aid are added in an external addition form, and the preparation method comprises the steps of mixing, pulping, foaming, foam stabilizing, pouring, drying, high-temperature sintering and the like. A foaming method is adopted to replace a traditional high-energy-consumption electric melting process, the sintering temperature is reduced to 1600-1700 DEG C, and the energy consumption is reduced by 30% or above. The obtained aggregate has high purity (Al2O3 is greater than 99.4 wt%), low volume density (1.5-2.0 g / cm < 3 >), high apparent porosity (50-70%), excellent normal-temperature compressive strength (20-30 MPa) and low thermal conductivity (0.3-0.7 W / (m.K) at 1000 DEG C), perfectly solves the problem that light weight, high strength and efficient thermal insulation performance are difficult to consider at the same time, and is suitable for producing working lining and thermal insulation layer products of high-temperature industrial kilns.

This invention discloses a method for preparing calcium ferrite from iron-based solid waste through low-temperature catalytic decomposition of phosphogypsum, belonging to the field of comprehensive utilization of solid waste. The method involves mixing, granulating, and roasting raw materials, including iron-based solid waste and phosphogypsum, to obtain calcium ferrite-containing sintered material. The roasting process involves feeding the material onto a belt roaster, first performing reduction roasting under a reducing atmosphere, and then performing oxidative roasting under an oxidizing atmosphere. This method fully utilizes the mineral composition characteristics of iron-based solid waste and phosphogypsum from the steel industry. By controlling the temperature and atmosphere during the high-temperature solid-phase reaction, the method achieves the directional transformation of iron and calcium components in the two industrial solid wastes into calcium ferrite-based products, while effectively removing harmful elements, resulting in high-quality calcium ferrite products.

The invention discloses a nanosheet-assembled porous rod-shaped BiVO4 triangular prism material and a preparation method thereof. Distilled water is used as a solvent to dissolve a mixed solution A of Bi(NO3)3·5H2O and CTAB and an ammonium metavanadate solution B respectively; the mixed solution A is added dropwise while the ammonium metavanadate solution B is vigorously stirred, and the stirring is continued to obtain a uniform reaction precursor mixed solution C; the precursor mixed solution C is transferred into a round-bottom flask and placed in a microwave reactor to be heated to 100° C. by microwave radiation to react; the resultant is cooled, centrifuged, washed and dried to obtain a porous rod-shaped BiVO4 triangular prism material assembled by nanosheets; the unique heating performance of microwave heating, which is fast and uniform and has no temperature gradient, is utilized to realize the synthesis of porous rod-shaped monoclinic BiVO4 triangular prisms without acid or alkali participation, simple operation, rapid controllability and environmental friendliness under the experimental parameters and operations selected by the invention; the obtained crystal product has high purity and good crystallinity and can be used in the field of photocatalysis.

The present application relates to a kind of boron stainless steel sheet for thermal neutron absorption preparation method, comprising the following process steps: (1) induction melting; (2) atomization and deposition; (3) forging; (4) hot rolling; (5) profile processing.The present application is through innovative process route, reasonable melting, plate processing deformation and heat treatment process, significantly improve the microstructure of material, refine hard and brittle boride particles, and then improve the hot workability of material and the mechanical properties of finished plate, meet the higher requirements of boron stainless steel sheet for thermal neutron absorption.According to the process manufactured by the present application, the performance of the plate is similar to powder metallurgy boron stainless steel, also has excellent comprehensive performance, and the process flow is shorter, and the manufacturing cost is also lower.

The application provides a method for in-situ combustion synthesis of high-purity nanometer silicon carbide powder, and belongs to the technical field of inorganic nanometer material preparation, and comprises the following steps: placing water-soluble saccharide substances, gel monomers, water-soluble solutions of a crosslinking agent and an initiator into ion exchange columns respectively for filtration purification, then mixing the water-soluble saccharide substances, the gel material and high-purity silicon powder to form a sol, further carrying out in-situ gel solidification and pre-carbonization treatment to obtain a Si / C composite material block; carrying out combustion synthesis reaction on the obtained Si / C composite material, grinding the obtained block-shaped product to obtain the high-purity nanometer silicon carbide powder. The high-purity carbon source and the silicon source are fixed by the gel network, the silicon powder is uniformly embedded in the carbon skeleton, uniform dispersion and close combination of the two are realized, and the in-situ combustion synthesis reaction is efficiently promoted. The raw material cost in the application is low, the preparation process is simple, the environment is friendly, and the application is suitable for industrialized large-scale production of high-purity nanometer silicon carbide powder.

This invention discloses a method for preparing polymethylsilane. The method includes cutting and crushing metallic sodium to obtain sodium fragments; adding the sodium fragments to an organic solvent and heating to a molten state to obtain a mixture; stirring and cooling the mixture to obtain a sodium sand mixture; mixing dichloromethylsilane, tetrahydrofuran, and 15-crown ether-5 and then adding the mixture dropwise to the sodium sand mixture for reaction, followed by cooling, solid-liquid separation, and distillation. This preparation method obtains a sodium sand product with uniform particle size, high activity, and clean surface by rapidly cooling after high-temperature dispersion of metallic sodium in a specific organic solvent system. By adding tetrahydrofuran and 15-crown ether-5 to dichloromethylsilane, the single electron transfer rate of metallic sodium to dichloromethylsilane can be increased, the activation energy of the reaction can be reduced, and the reaction efficiency can be improved. Furthermore, the continuous dropwise addition saves reaction time.

The invention provides a method for preparing cryolite by using rare earth molten salt electrolytic slag alkaline leaching liquid. The method comprises the following steps: firstly, decomposing rare earth molten salt slag through a sub-molten salt technology, separating rare earth and fluorine in the rare earth molten salt slag through water washing to obtain a fluorine-containing alkaline solution, and then enriching fluorine in the solution through simple evaporation and concentration to obtain a high-alkali fluorine-containing solution. The fluorine-containing solution is added into an aluminum sulfate solution, aluminum ions necessary for cryolite synthesis are introduced, the pH value, the composition proportion, the temperature and the reaction time are adjusted, high-molecular-ratio cryolite is finally prepared, and resource utilization of fluorine in the molten salt slag is achieved. According to the method, fluorine in the slag can be efficiently recycled while rare earth is efficiently recycled from the rare earth molten salt electrolysis slag, the recycling rate of fluorine is larger than 95%, the process is simple, only simple impurity removal is needed, gradient separation of various ions is not needed, acid waste gas is not prone to being generated under the alkaline condition, and safety is higher. The prepared cryolite meets national standard requirements, and the process is simple and easy to operate.

This invention discloses a highly ordered micron-shaped flower material with three phases coexisting: tetragonal scheelite-type BiVO4, monoclinic BiVO4, and [Bi6O5(OH)3](NO3)5·3H2O, and its control method. The method includes: preparing a mixed solution A of bismuth nitrate and hexadecyltrimethylammonium bromide and a solution B of ammonium metavanadate using deionized water as a solvent; adding mixed solution A dropwise to solution B under vigorous stirring to obtain a reaction precursor solution C; placing solution C in a microwave reactor and performing a microwave radiation reaction at 100°C without pH adjustment to obtain a solid-liquid suspension sample; and centrifuging, washing, and drying the sample to obtain the three-phase coexisting product. This invention utilizes microwave radiation technology to control the morphology and composition of the product without the need for acid or alkali conditions. The method is simple, efficient, and energy-saving.

The invention discloses a carbon-coated pre-magnesium silicon monoxide negative electrode material and a preparation method thereof, the negative electrode material comprises a silicon core, a silicon-magnesium composite porous layer and a carbon-coated layer, the silicon-magnesium composite porous layer comprises MgSiO3 and Mg2SiO4 with porous characteristics, and the porosity is not less than 30%; the material shows a unique peak position and intensity relationship in an XRD diffraction pattern, and Mg2SiO4 is used as a main phase. According to the preparation method, through molten salt mediated low-temperature solid-phase reaction and addition of reducing gas during heat treatment, energy consumption is greatly reduced, a generated Mg2SiO4 crystal structure is more stable than traditional MgSiO3, and a porous structure (porosity is larger than 30%) formed through the cooperation reaction enables the material to maintain high capacity of 1621.49 mAh / g, meanwhile, the first efficiency is improved to 85.91%, and the cyclic expansion rate is reduced by 40% or above.

The utility model discloses a high-temperature flue gas rotary furnace waste heat utilization system which comprises a rotary cooling furnace and a rotary heating furnace, the rotary cooling furnace and the rotary heating furnace both comprise furnace bodies, heat accumulators are arranged in the furnace bodies, a kiln tail cover and a kiln head cover are distributed at the two ends of the furnace bodies, and lifting plates are arranged on the inner walls of the furnace bodies; the high-temperature flue gas pipe is connected with a kiln tail cover of the rotary cooling furnace, a kiln head cover of the rotary cooling furnace is sequentially connected with the dust remover, the induced draft fan, the chimney and the normal-temperature gas pipe through the cooling flue gas pipe, and the heating gas pipe is connected with the kiln tail cover of the rotary heating furnace; the storage bin is arranged at the bottom of a kiln tail cover of the rotary cooling furnace, the discharge valve is arranged at the bottom of the storage bin and connected with a kiln head cover of the rotary heating furnace through the high-temperature feeder, and the bottom of the kiln tail cover of the rotary heating furnace is connected with the kiln head cover of the rotary cooling furnace through the feeding end of the elevator of the feeder and the discharging end of the elevator. According to the system, the maximum utilization of the high-temperature flue gas waste heat is realized.

The invention discloses a method for co-producing battery-grade lithium phosphate and boric acid by using salt lake brine lithium extraction mother liquor. The method comprises the following steps: adjusting the pH value of the salt lake brine lithium extraction mother liquor to 11-14, then adding sodium phosphate, and carrying out nucleation, aging and separation treatment to prepare crude lithium phosphate; carrying out acid dissolution treatment on the crude lithium phosphate, and then obtaining a lithium-rich calcium-magnesium-boron removal solution and a boron saturation adsorption column through calcium-magnesium chelating resin and boron special-effect resin; wherein the boron saturation adsorption column is used for preparing boric acid; and adjusting the pH value of the lithium-rich calcium-magnesium-boron removal solution to 11-14, adding a dispersing agent, and then performing aging, filtering, sizing and washing and drying treatment to obtain the battery-grade lithium phosphate. According to the method, the mother liquor for extracting lithium from the salt lake brine is taken as a raw material, lithium resources in the mother liquor are separated and extracted by adopting a coprecipitation method, lithium is firstly converted into crude lithium phosphate, and the crude lithium phosphate is subjected to acid dissolution, impurity removal and purification treatment, so that a battery-grade lithium phosphate product and boric acid are prepared. And the resource utilization efficiency is improved.

An electric heating rotary kiln for direct reduction iron is used for reducing iron ore into direct reduction iron. A plurality of heating sections are arranged in a hearth reduction section of the rotary kiln, and each heating section is heated through a plurality of direct-current power supplies with independently adjustable power output. The positive electrode and the negative electrode of the heating power source of each heating section in the hearth are in contact with the solid material in the hearth, current is fed into the solid material, and the material is heated through resistance heating of the solid material. The heating power supply anodes of the adjacent heating sections are adjacent to or share the anodes, or the cathodes of the adjacent heating sections are adjacent to or share the cathodes. And the contact part of each electrode and the material is made of high-temperature-resistant alloy. The direct reduction iron rotary kiln has the advantages that the rotary kiln can be large-sized, the service life of the electrode is long, the length of each heating section is convenient to set, the over-high heating power supply voltage to the ground is avoided, the production efficiency of the direct reduction iron rotary kiln is greatly improved, and the carbon emission is greatly reduced.

The present invention belongs to the technical field of fuel cells, and specifically relates to a method for preparing an anode catalyst of a proton exchange membrane fuel cell. The preparation method of the present invention comprises the following steps: (1) Preparation of iridium carbon: adding carbon powder to deionized water, and adding an iridium precursor solution, a first reducing agent, and an additive in sequence after being evenly dispersed, and adjusting the pH value of the slurry, heating, performing solid-liquid separation, and drying to obtain the first stage of iridium carbon; (2) Preparation of platinum iridium carbon: adding deionized water to the iridium carbon obtained in step (1), and adding a second reducing agent after being evenly dispersed, and adjusting the slurry particle size to D 90 <30μm, add platinum precursor, adjust the pH value of the slurry, heat, separate solid and liquid, remove impurities, and dry to obtain platinum iridium carbon catalyst powder. The method for preparing anode catalyst of proton exchange membrane fuel cell can improve the anti-reverse polarity ability while reducing the amount of precious metals.