24 results about "Magnesium peroxide" patented technology

The invention provides a biological carbonized magnesium chloride cement residue soil brick and a preparation method thereof, and belongs to the technical field of building materials. The biological carbonized magnesium chloride cement muck brick is prepared from the following raw materials in parts by weight: 3 to 7 parts of muck, 0.6 to 3 parts of magnesium oxide, 0.02 to 0.1 part of magnesium chloride, 0.013 to 0.015 part of a retarder, 0.9 to 1.5 parts of a bacterial solution and 0.5 to 1.5 parts of a urea solution, the bacterial liquid comprises bacillus pasteurii. According to the invention, the muck is used as a main raw material, so that resource utilization of building wastes is realized; through the mutual cooperation of magnesium oxide, magnesium chloride, bacillus pasteurii and urea components and the synergistic effect of microbial mineralization (bio-carbonate) and magnesium chloride cement hydration (chemical gel), the limitation of a single curing technology on strength is broken through, and the compactness and compressive strength of the muck brick are improved.

This invention discloses a method for preparing recycled planting soil from river dredging soil. First, 0.5-1% wt quicklime and 20-30 g / cubic meter of chloropicrin are mixed into low-moisture dredging soil cake, then covered with a film and left to stand at room temperature for 3-4 days to allow the ash to settle. Next, 1-2% wt wood ash, 1-3‰ wt indoleacetic acid, and 3-6% wt magnesium peroxide are mixed into the sterilized dredging soil. Finally, a soil layer structure is laid, thereby creating a planting environment that promotes plant root growth. This invention's preparation method is simple, resource-efficient, and environmentally friendly. It effectively solves the problems of low plant survival rates and slow growth when dredging soil is directly used for planting, and alleviates many problems associated with storing dredging soil.

This invention relates to the field of casting technology, specifically to a process for preparing easily collapsible clay sand and low-alloy steel bucket tooth shell molds using waste sand as raw material. The process is characterized by a formula comprising the following parts by weight: 90-110 parts recycled waste sand, 1-6 parts binder, 2-12 parts collapsing liquid, 0.2-2 parts thermal conductive agent, and 2-6 parts water. The binder is sodium-based bentonite, the collapsing liquid is a CH28 type aqueous solution, and the thermal conductive agent is magnesium peroxide. This invention is environmentally friendly, activating the effective binding capacity of bentonite, thus reducing the amount of bentonite added by 50%, while achieving 100% complete collapsibility of the low-alloy steel bucket tooth shell mold. It exhibits excellent collapsibility performance and achieves 95% recycling of waste sand, significantly reducing solid waste emissions and new sand consumption, saving new sand costs, and making a significant contribution to environmental and resource protection.

The present application relates to the technical field of catalyst protectant, in particular to a magnesium-aluminum spinel protectant and a preparation method thereof, which is prepared from magnesium-aluminum composite powder A, magnesium-aluminum composite powder B and an additive. The magnesium-aluminum composite powder A is prepared by mixing magnesium peroxide and magnesium-aluminum spinel A prepared by a specific method, and the magnesium-aluminum composite powder B involves a plurality of magnesium-containing compounds and specifically mixed magnesium-aluminum spinel B. The preparation process covers fine pretreatment of each raw material, such as treatment of magnesium peroxide, aluminum oxide, aluminum powder and the like, and precise control of parameters such as temperature, time and rotation speed in the links of combustion synthesis, high-temperature sintering, mixing and grinding. Experiments show that the specific surface area of the protectant is large, the porosity is high, the mechanical strength is good, the adsorption capacity of impurities and poisons in the complex raw material gas is strong, and the carbon monoxide sulfur shift catalyst can be effectively protected, and the performance and service life of the carbon monoxide sulfur shift catalyst in industrial production can be significantly improved.

The present invention provides a diamond polishing liquid and its preparation method and application, belonging to the field of polishing process technology. The diamond polishing liquid comprises diamond micropowder, a dispersant, an oxidant, an oxidizing agent, a metal peroxide and water in a mass ratio of (2-10): (0.5-5): (3-10): (1-5): (1-5): 100; the pH value of the diamond polishing liquid is 4-7; the oxidizing agent comprises percarbonate and / or perborate; the metal peroxide comprises any one of barium peroxide, calcium peroxide or magnesium peroxide or a combination of at least two thereof. The diamond polishing liquid of the present invention realizes chemical-mechanical coordinated polishing of diamond, greatly improves the polishing efficiency of diamond, and the polished diamond has low roughness and good quality.

This invention relates to a pH-responsive multifunctional nanoplatform M@FNPs, a drug-loaded composition MP@FNPs, its preparation method, and its applications, belonging to the fields of nanomaterials and biomedical materials technology. The preparation method of the pH-responsive multifunctional nanoplatform M@FNPs includes the following steps: in-situ doping of ZIF-8 with ferric ions during synthesis to obtain iron-doped ZIF-8; dissolving magnesium peroxide nanoparticles and iron-doped ZIF-8 in a solvent; ultrasonicating to load the magnesium peroxide nanoparticles onto the iron-doped ZIF-8; and drying to obtain the final product. The MP@FNPs of this invention, by integrating pH-responsive release, self-supply of hydrogen peroxide and oxygen, and continuous GSH depletion functions, can specifically activate a self-maintaining cascade reaction in the tumor microenvironment, disrupting the redox homeostasis of tumor cells and inducing ferroptosis, thereby effectively overcoming the resistance of tumor cells to platinum-based drugs and synergistically enhancing the efficacy of chemotherapy-immunotherapy.

The invention relates to a preparation method of a sustained-release microsphere, which is constructed based on the synergistic combination of calcium peroxide (CaO2) and magnesium peroxide (MgO2), is used for consolidating the river regulation effect, and belongs to the technical field of environmental functional materials. Core components of the microspheres comprise CaO2 powder and MgO2 powder which are mixed according to the mass ratio of (4: 1)-(1: 1). The preparation method comprises the following steps: adding CaO2 and MgO2 composite powder into a disc granulator in batches by adopting a low-temperature dry-method rotary granulation process, regulating the rotating speed (20-40 rpm) and the temperature (25-50 DEG C) in stages, synchronously spraying a small amount of deionized water or other solutions as an adhesive, and controlling the humidity to be less than or equal to 5% to prepare spherical particles with the particle size of 1.5-5 mm. According to the invention, the performance of a common CaO2 repairing agent is further optimized on the basis of the common CaO2 repairing agent. The method has the advantages of easily available raw materials, simple process, convenience in operation and low energy consumption, is suitable for the fields of water body remediation and bottom mud passivation, and has industrial popularization value.

The application discloses a sintering oxidation catalyst for high-ratio magnetic concentrate and a use method thereof, which is composed of a sintering oxidizing agent and a sintering catalyst, and the preparation raw materials of the oxidizing agent include, in terms of weight fractions, 30-55 parts of calcium peroxide, 25-45 parts of magnesium peroxide, 2-15 parts of potassium permanganate and 2-12 parts of calcium ferrite; and the preparation raw materials of the sintering catalyst include, in terms of weight fractions, 30-60 parts of dolomite, 20-40 parts of iron powder, 10-20 parts of rare earth tailings and 5-15 parts of sintering dust removal ash. The sintering oxidation catalyst is prepared, the oxidizing agent adding proportion is optimized according to the high-low ratio of iron concentrate and the poor oxidation difference of the magnetic concentrate, the oxidation reaction capacity of the iron concentrate is improved, the sintering catalyst is prepared, the combustion efficiency of the solid fuel is improved, the sintering oxidation kinetics condition of the high-ratio magnetic concentrate is improved, and the sintering production efficiency and the sinter quality are improved.

The invention provides a chromium-free iron-based gas phase fluorination catalyst as well as a preparation method and application thereof, and relates to the technical field of fluorine chemical industry. Based on 100 parts by mass of a carrier, the catalyst comprises 20-40 parts by mass of fluoride of iron; 5-15 parts by mass of a first auxiliary agent, wherein the first auxiliary agent comprises metal fluorides of one or more elements selected from titanium, tin and antimony; 5-10 parts by mass of a second auxiliary agent, wherein the second auxiliary agent comprises one or more of calcium peroxide, strontium peroxide, magnesium peroxide, potassium permanganate, zinc peroxide and sodium percarbonate; 1-3 parts by mass of a binder; and 100 parts by mass of a carrier. A proper amount of the specific second auxiliary agent is added into the catalyst, so that the catalyst can be decomposed at a proper temperature to release heat and generate oxygen, the oxygen can be provided through decomposition of the second auxiliary agent in the fluorination reaction process, carbon deposition on the catalyst is eliminated in situ, and the service life of the catalyst is prolonged; the catalyst is free of chromium element, non-toxic and environment-friendly; the raw materials are easily available, and the cost advantage is prominent.

The invention relates to the technical field of ecological environment restoration, and discloses a wetland substrate improvement and aquatic vegetation reconstruction integrated method, which comprises: 1, dissolving sodium carboxymethyl cellulose powder in deionized water, adding tannic acid powder, and stirring and mixing; step 2, adding xanthan gum into deionized water, shearing and stirring to form a suspended substrate, sequentially adding calcium lactate and modified magnesium peroxide powder, and uniformly dispersing to obtain a second component; and step 3, placing the root system of the submerged plant in the protective sleeve at the outlet of the coaxial injection conduit, so that the root system is located at the downstream position of the static mixer at the tail end of the conduit. By introducing calcium lactate and utilizing modified magnesium peroxide to generate an alkaline environment, the method can capture high-concentration carbon dioxide gas in interstitial water of the bottom mud and convert the high-concentration carbon dioxide gas into calcium carbonate mineral precipitate in situ, and the process not only increases the physical density and anti-scouring capacity of artificial rhizosphere, but also consumes acidic greenhouse gas in the bottom mud.

The present application belongs to the technical field of refractory material, and discloses a self-propagating reaction sintering magnesium-aluminum spinel ramming material and a preparation method thereof. The ramming material comprises the following raw materials in mass fraction: 30-40 parts of spinel with a particle size of 3-6 mm, 5-15 parts of spinel with a particle size of 1-3 mm, 8-15 parts of magnesia with a particle size of less than 1 mm, 3-5 parts of silicon carbide with a particle size of less than 1 mm, 3-5 parts of silicon nitride powder, 2-5 parts of metal silicon powder, 8-12 parts of active alumina powder, 15-30 parts of magnesium peroxide powder, and 5-10 parts of metal aluminum powder, wherein the sum of the mass fractions of the above raw materials is 100 parts, and 1-2 parts of liquid binder is additionally added. The ramming material uses magnesium peroxide as the oxygen source to cause the aluminothermic reaction of metal aluminum, promotes the sintering of the material, uses silicon carbide and silicon nitride as the heat-conducting agent to rapidly transfer the released heat, uses alumina powder as the diluent to avoid the collapse caused by the excessive reaction heat stress, so that the ramming material successfully passes through the self-propagating reaction sintering, the sintering energy consumption is low, and the sintered product has excellent performance.

The invention discloses a hydrotalcite nano composite material as well as a preparation method and application thereof, and belongs to the technical field of medical bone tissue regeneration materials. The hydrotalcite nano composite material comprises an etched zinc-copper-molybdenum hydrotalcite nanosheet, magnesium peroxide and a 45S5 bioactive glass bracket, magnesium peroxide is loaded on the etched zinc-copper-molybdenum hydrotalcite nanosheet, and is marked as a-ZnCuMo-LDH (at) MgO2; the a-ZnCuMo-LDH (at) MgO2 is attached to the surface of the 45S5 bioactive glass bracket, and the alpha-ZnCuMo-LDH (at) MgO2 is marked as a-ZnCuMo-LDH (at) MgO2-BG. The hydrotalcite nano composite material disclosed by the invention has sonodynamic performance, relatively low cytotoxicity and degradability, good biocompatibility, excellent anti-tumor performance and bone repair promotion capability, and has potential application prospects in related orthopedic surgeries.

The invention relates to a preparation method of a magnesium oxide-doped fluorine corrosion-resistant coating. The preparation method comprises the following steps: carrying out ultrasonic cleaning on an aluminum alloy matrix and then drying; preparing a magnesium oxide suspension electrolyte; the dried aluminum alloy matrix is put into a magnesium oxide suspension electrolyte to be subjected to micro-arc oxidation treatment, so that an aluminum oxide layer and a MgAl2O4 spinel phase layer are sequentially formed on the surface of the aluminum alloy matrix; and the aluminum alloy matrix subjected to micro-arc oxidation treatment is put into a fluorine ion-containing environment, so that an MgF2 passivation layer is formed on the surface of the MgAl2O4 spinel phase layer, and the magnesium oxide-doped fluorine corrosion-resistant coating is obtained. Through the synergistic effect of magnesium oxide nano particle doping and micro-arc oxidation process optimization, the coating forms a dual protection mechanism in a fluorine-containing ion environment, namely an MgAl2O4 spinel phase fills up micro defects (structure strengthening) in the coating, and a melt comes out of a discharge channel and forms a compact MgF2 passivation layer on the surface together with magnesium oxide; and fluorine ion permeation (chemical passivation) is blocked, so that the corrosion resistance is improved.

The invention relates to fiber-reinforced magnesium phosphate cement with the setting time capable of being regulated and controlled in a large range and a preparation method thereof, and belongs to the technical field of preparation of building raw materials. The cement comprises the following raw materials in parts by weight: 35-55 parts of modified magnesium oxide, 20-35 parts of acid phosphate, 5-10 parts of a retarder, 15-30 parts of a mineral admixture, 2-5 parts of a polymer water reducer, 0.5-2.5 parts of modified carbon fibers and 8-16 parts of water. The invention also provides a preparation method of the magnesium phosphate cement. According to the invention, magnesium oxide and aluminum oxide are subjected to a solid-phase reaction at a high temperature, a layer of magnesium aluminate spinel is grown on the surface of magnesium oxide as an isolating layer to modify the surface of magnesium oxide, and meanwhile, the temperature, time and raw material dosage in the solid-phase reaction process can be controlled, so that the solidification time of magnesium phosphate cement can be regulated and controlled between 20 minutes and 135 minutes. The cement has the advantages of high early strength, fast strength development, high bonding strength, good volume stability, convenience in construction and the like.

The utility model discloses a storage device for sludge, and relates to the field of sludge recovery treatment, the storage device comprises a device base, a storage mechanism and a supporting mechanism, the storage mechanism is fixedly mounted on the top surface of the device base, the supporting mechanism is welded to the front end position of the top surface of the device base, and a slurry pump is fixedly mounted above the supporting mechanism; the rear end of the slurry pump is in through connection with a screw pipe, and an extraction hose is fixedly inserted below the slurry pump; a motor is installed on the right side wall of the storage mechanism in an embedded mode, an inner barrel is fixedly embedded in the storage mechanism, and a feeding pipe is connected to the top face of the inner barrel in a penetrating mode. Sludge is dried through the resistance wire and the heat conduction pipe, the resistance wire generates heat through current, the generated heat is conducted to the heat conduction pipe through magnesium oxide powder, the purpose of heating and drying the sludge in the inner barrel is achieved, the heating effect is good, the working efficiency is high, the spirally-distributed heat conduction pipe can make the inner barrel evenly heated, uneven sludge drying work is avoided, and the sludge drying efficiency is improved. The drying effect is improved.

The application belongs to the technical field of carbon dioxide adsorbents, and provides a magnesium oxide-based carbon dioxide adsorbent and a preparation method thereof. Basic magnesium carbonate is calcined to obtain magnesium oxide powder; the magnesium oxide powder is immersed in an alkali metal salt solution and then dried to obtain magnesium oxide powder loaded with alkali metal; the magnesium oxide powder loaded with alkali metal is immersed in a calcium nitrate solution and then sequentially subjected to drying, calcination and refinement treatment to obtain the magnesium oxide-based carbon dioxide adsorbent. The adsorbent of the application effectively improves the carbon dioxide adsorption capacity and cycle stability of the adsorbent through the mutual synergistic effect of magnesium oxide, sodium ions, potassium ions, manganese ions and calcium oxide and by controlling the proportion of each component and the process parameters, has high carbon dioxide removal rate, and has excellent cycle regeneration performance; the immersion of magnesium oxide in the alkali metal salt solution can further increase the pores of the adsorbent, which is conducive to the diffusion of carbon dioxide in the interior of the adsorbent.

The utility model relates to the field of silicon steel production equipment, and discloses a magnesium oxide coating liquid filtering device which comprises a box body, and a feeding hole is formed in the upper part of the box body; a filter screen is arranged in the box body and divides the box body into an upper box body and a lower box body; a first outlet is formed in the upper box body, and the first outlet is located above the filter screen; a second outlet is formed in the lower box body; the device further comprises a magnesium oxide coating liquid storage tank, a feeding pipe and a magnesium oxide coating liquid backflow pipeline. One end of the feeding pipe is connected with the magnesium oxide coating liquid storage tank, and the other end of the feeding pipe is arranged above the feeding hole; and the second outlet is connected with the magnesium oxide coating liquid storage tank through a magnesium oxide coating liquid return pipeline. The device is simple in design structure and convenient to implement, large-particle magnesium oxide in the magnesium oxide coating liquid can be separated, a better magnesium oxide coating liquid large-particle separation effect is achieved, the working efficiency is improved, the filtering and separating efficiency is high, and the device is suitable for magnesium oxide coating liquid filtering application and popularization.

The utility model relates to the technical field of magnesium peroxide production equipment, and discloses a stirring kettle for magnesium peroxide production, which comprises a heat insulation sleeve, the bottom of the heat insulation sleeve is fixedly connected with a conical base, the middle of the inner wall of the heat insulation sleeve is fixedly connected with a heating ring, and the inner wall of the heat insulation sleeve is fixedly connected with a pear-shaped reaction block. The left side of the outer wall group of the pear-shaped reaction block is communicated with a feeding pipe, the outer wall of the feeding pipe penetrates through the heat preservation sleeve and is fixedly connected with a valve, the top of the pear-shaped reaction block is fixedly connected with a hole cover plate, and the rear side of the top end of the hole cover plate is fixedly connected with an electric telescopic rod. According to the utility model, liquid is placed between the heat insulation sleeve and the pear-shaped reaction block, the feeding pipe is used for feeding raw materials, the heating ring is started to heat the liquid, the pear-shaped reaction block is ensured to be uniformly heated, the electric telescopic rod, the movable plate and the cylinder are started to move upwards, and a gap is formed at the bottom of the hollow cylinder, so that uniform heating and temperature control are realized.

The invention discloses a method for preparing magnesium peroxide by high-energy rays, which comprises the following steps of: fully and uniformly mixing magnesium oxide powder with a small amount of graphene, and then placing the mixed material in an irradiation environment of X-ray beams under the conditions that the voltage of a high-energy ray emitter is 30-40KV and the current of the high-energy ray emitter is 30-40mA, so that active sites are formed on magnesium oxide by excitation; under the condition that the irradiation condition of the X-ray light beam is kept unchanged, ozone is introduced, so that the ozone and active sites on the magnesium oxide are rapidly combined and react to generate peroxy bonds, synthesis of the magnesium peroxide is realized, and after the reaction is finished, discharging is performed to obtain a finished product of the magnesium peroxide. The process steps are simple and convenient, water is not introduced as a medium, the reaction is carried out in a gas phase environment, the links of solid-liquid separation, washing and drying are omitted, the reaction time is greatly saved, the content of magnesium peroxide in the product is high, and the product can be well applied in industry.

The invention discloses a method for preparing magnesium metal from magnesium oxide, and belongs to the field of magnesium metal preparation. The method mainly comprises the following steps: mixing a magnesium oxide raw material and a carbonaceous reducing agent according to a mass ratio of 1: (0.8-1.2), and carrying out preheating treatment under the protection of inert gas at 200-400 DEG C for 1-3 hours; s2, a silicon-based reducing agent is added into the mixture obtained in the step S1, the molar ratio of carbon to silicon is 3: 1-5: 1, a calcium fluoride catalyst accounting for 1-5% of the total mass of the mixture is added, and a composite reduction system is formed. By innovatively designing the synergistic effect of a carbon-silicon composite reduction system and a calcium fluoride catalyst, the efficiency and selectivity of magnesium oxide reduction reaction are remarkably improved, and the reaction activation energy is reduced. A sectional temperature control process is combined with dynamic pressure regulation, so that accurate regulation and control of the reaction process are realized, and the reaction rate and the product stability are effectively balanced. And a nanoscale reducing agent and a graphene-carbon nanotube composite material are adopted, so that the activity of a reaction interface is enhanced.

The invention discloses a core-shell microneedle for treating intervertebral disc degeneration and a preparation method of the core-shell microneedle, and relates to the technical field of biological medicines. The core-shell microneedle comprises a substrate and a plurality of microneedles arranged on the substrate, each microneedle has a core-shell structure, the core-shell structure comprises a shell layer and a core layer, the shell layer comprises a metal phenolic aldehyde self-driven nano-motor and adipic dihydrazide-dihydrocaffeic acid modified hyaluronic acid, and the core layer comprises a metal phenolic aldehyde self-driven nano-motor and adipic dihydrazide-dihydrocaffeic acid modified hyaluronic acid. The metal phenolic aldehyde self-driven nano motor is a metal phenolic aldehyde complex network TA (at) MgO2 composed of tannic acid and magnesium peroxide, the chemical formula of the adipic acid dihydrazide-dihydrocaffeic acid modified hyaluronic acid is shown in the specification, and the TA (at) MgO2 is dispersed in the adipic acid dihydrazide-dihydrocaffeic acid modified hyaluronic acid; the core layer comprises a porous slow-release hydrogel, and the porous slow-release hydrogel is loaded with a drug quercetin through the host-guest interaction. The core-shell microneedle provided by the invention can reduce the intracellular ROS level of degenerative fibrous ring cells and recover the activity of AF cells.

The invention provides a dip-coating method for attaching magnesium oxide to a graphene heating film. The dip-coating method comprises the following steps: S1, carrying out corona treatment on a graphene layer on the surface of the graphene heating film; s2, combining micron-sized magnesium oxide powder with nano silicon dioxide by using a chemical grafting method, and refining magnesium oxide grains; s3, vertically immersing the graphene heating film into the magnesium oxide suspension; s4, after immersing for 30-60 seconds, taking out the graphene heating film from the magnesium oxide suspension at a speed of 5-10 cm / min, and transferring the graphene heating film to an environment of 40-80 DEG C for drying for 10-15 minutes; s5, rolling the graphene heating film by adopting a hot pressing roller; and S6, carrying out ultraviolet irradiation curing on the graphene heating film by adopting ultraviolet light so as to enhance the crosslinking of the coating. The leakage current generated by the graphene layer can be blocked through the magnesium oxide layer, and the purpose of reducing the leakage current of the graphene heating coating is achieved.

The invention discloses a high-oxygen surface interface as well as a construction method and application thereof, belongs to the technical field of implants, and solves the problem that the safety and the implantation effect of an implant in the prior art are not ideal enough. The method comprises the following steps: sequentially carrying out double-acid treatment and silanization treatment on a base material, carrying out magnesium peroxide deposition and hydrogel coating construction on the surface of the base material, and drying to obtain the base material with a high-oxygen surface interface; wherein the construction of the hydrogel coating comprises the following steps: coating a substrate with a pre-gel solution in a spinning manner, and carrying out photo-crosslinking under blue light; the pre-gel solution is prepared from acrylic acid modified silk fibroin and acrylic acid modified catalase. According to the method provided by the invention, the bonding strength of the hydrogel coating is remarkably improved, and the hydrogel coating is kept stable in a body fluid environment.

The application belongs to the technical field of refractory materials, and discloses an aluminum-thermal reaction sintered alumina hollow ball heat-insulating refractory material and a preparation method thereof.The aluminum-thermal reaction sintered alumina hollow ball heat-insulating refractory material comprises the following raw materials in mass percentage: 20-30% of alumina hollow balls with a particle size of 3-5 mm, 10-20% of alumina hollow balls with a particle size of 1-3 mm, 5-15% of alumina hollow balls with a particle size of 0.1-1 mm, 2-10% of light-burned magnesia, 20-30% of active alumina powder, 15-25% of magnesium peroxide powder, 4-7% of aluminum powder, and 2-4% of a binder in addition to the total mass of the above raw materials.The refractory material utilizes the aluminum-thermal reaction of aluminum and magnesium peroxide to realize self-reaction sintering, forms a continuous spinel structure on the surface of the matrix and the alumina hollow balls, realizes high strength at low temperature, and has low thermal conductivity and high thermal shock stability.