12 results about "Magnesium peroxide" patented technology

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.

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 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 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 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 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 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.