26 results about "Basic oxide" patented technology

The invention relates to the technical field of foam materials, in particular to a modified polyethylene foam material and a preparation method thereof, and the modified polyethylene foam material comprises the following components: a polyethylene matrix, modified silicon dioxide aerogel, LDH-polyethylene-maleic anhydride, hydroxyapatite-stearic acid, a foaming agent, a cross-linking agent and an antioxidant. When a fire disaster occurs, LDH is heated and decomposed to form a first protective barrier, molten polyethylene liquid is prevented from permeating into pores, and redundant H < + > in a system is consumed by decomposed alkaline oxide. The phosphoaluminate inorganic network and an organic polymer generated by catalysis of ZnCl2 / FeCl3 form an organic-inorganic hybrid blocking layer, so that a second protective barrier is formed, pore gaps are flexibly filled with the organic layer, and the inorganic layer provides high-temperature stability. The stearic acid is preferentially coordinated with ZnCl2 / FeCl3 acid and is stable at the processing temperature of the foaming agent, so that the stearic acid cannot act with the foaming agent and a PE chain, and the foaming quality is guaranteed.

The invention provides an E6011 type cellulose welding rod and a preparation method thereof. The welding rod comprises a core wire and a coating, and the surface of the core wire is coated with the coating in a pressed mode; the coating is prepared from, by weight, 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of manganese metal, 5-10 parts of fused magnesite, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon. According to the coating, a titanium type slag system is adopted, and a composite blowing force system is constructed to stabilize electric arcs and enhance electric arc blowing force, so that welding spatter and smoke dust are reduced; the slag alkalinity is adjusted by introducing alkaline oxide and CMC-Ca, so that the liquidity of molten iron during vertical downward welding is effectively controlled, and the process adaptability and the production convenience are both considered; and the high-proportion iron powder is added to improve the deposition efficiency, sleeve carbonization is inhibited through the synergistic effect of the magnesia and the iron sand, and the re-arc striking performance of the welding rod is improved. Splashing and smoke dust amount in the welding process can be remarkably reduced, and the comprehensive welding performance is excellent.

The invention relates to the technical field of fine chemical engineering, and provides a method for synthesizing dipentaerythritol and a composite material thereof. The amino-rich mesoporous molecular sieve and alkaline oxide are mixed in proportion to adsorb formaldehyde, and the reversible formaldehyde-loaded composite material is obtained. In the reaction process, acetaldehyde or acetaldehyde-formaldehyde mixed liquid is put into a reactor at a time, the composite material is added, then alkali liquor is added into a system continuously or in batches at a controlled rate, formaldehyde is slowly released from the composite material and enters the reaction system, condensation reaction is conducted on the formaldehyde and acetaldehyde under the low-temperature condition, and dipentaerythritol is directionally generated. After the reaction is finished, the composite material is filtered and recycled, and can be recycled after being roasted.

The invention relates to a multifunctional efficient low-cost electroslag remelting new slag system and a smelting method, and belongs to the technical field of electroslag metallurgy. The slag system comprises the following components in percentage by mass: 60%-80% of CaF2, 20%-30% of Al2O3, 5%-15% of MgO and 1%-5% of CeO2. The slag system is located in an eutectic area by accurately regulating and controlling the proportion of basic oxides such as CaF2, Al2O3 and MgO, and the metallurgical performance of the slag system is remarkably improved. Meanwhile, due to the existence of MgO, the slag system can form a stable protection layer to cover the surface of a molten pool, oxygen is effectively isolated, the situation that Y is directly exposed in air is reduced, and then the oxidation and volatilization loss of Y is greatly reduced. A trace amount of rare earth element CeO2 is added as an active additive, and the unique electronic structure characteristic of the rare earth element CeO2 is utilized, so that the selective adsorption capacity and the transmission rate of a slag system to Y ions are enhanced, the migration speed of the Y ions into a new metal phase is accelerated, and the overall recovery rate of Y is improved.

The application discloses a closed loop process for synchronously increasing the value of silicon and fluorine components in silicon tetrafluoride, and belongs to the technical field of fluorine-containing silicon byproduct resource utilization. The steps are as follows: 1) mixing anhydrous alcohol with triethylamine, and introducing silicon tetrafluoride gas at 0-30 DEG C to generate alkyl orthosilicate and triethylamine monohydrofluoride; 2) distilling the reaction liquid to recover alcohol, performing vacuum rectification to obtain alkyl orthosilicate product, and separating to obtain triethylamine monohydrofluoride; 3) adding triethylamine monohydrofluoride into water, and performing heating reflux reaction with inorganic alkali or basic oxide to separate to obtain triethylamine crude product and fluorinated metal salt; 4) after dehydration rectification, the triethylamine crude product is recycled to step 1) with recovered alcohol; and the fluorinated metal salt is post-treated to obtain high-purity fluorinated metal salt. The process has low reaction temperature, high alkyl orthosilicate yield, recyclable triethylamine, all fluorine solidified into high-value-added products, no three-waste emissions, and can be continuously industrialized.

The present application relates to the technical field of fine chemical industry, and provides a method for synthesizing dipentaerythritol and a composite material thereof.Ammonia-rich mesoporous molecular sieve is mixed with alkaline oxide in proportion, and then formaldehyde is adsorbed to obtain a composite material reversibly loaded with formaldehyde.In the reaction, acetaldehyde or a mixed solution of acetaldehyde and formaldehyde is put into a reactor at one time, the above composite material is added, and then an alkali solution is continuously or in batches added to the system at a controlled rate, formaldehyde is slowly released from the composite material into the reaction system, and the condensation reaction of acetaldehyde and formaldehyde occurs under low-temperature conditions to directionally generate dipentaerythritol.After the reaction is completed, the composite material is recovered by filtration and can be recycled after calcination.

A flux for electroslag welding used for electroslag welding may include a basic oxide, an amphoteric oxide, an acidic oxide, and a fluoride. With respect to a total mass of the flux, the basic oxide may include 5.1 mass % or more and 30.0 mass % or less of CaO, the acidic oxide includes 17 mass % or less of SiO2, and the fluoride includes 35 mass % or more and 73 mass % or less of CaF2. A content of the CaO is 30 mass % or more with respect to a total mass of the basic oxide, a content of the SiO2 is 80 mass % or more with respect to a total mass of the acidic oxide, a content of the CaF2 is 80 mass % or more with respect to a total mass of the fluoride, and a value of (2×[CaF2]+[CaO]) / [SiO2] is 5 or more and 56 or less.

This application relates to the field of hydrogen production technology through water electrolysis, and discloses an integrated membrane electrode for pure water electrolysis. The membrane electrode consists of a proton exchange membrane, a composite catalyst layer, and a three-dimensional continuous platinum metal network at the interface. The composite catalyst layer is made of a non-precious metal catalyst, hydroxylated basic oxides, and anion exchange resin. Its preparation involves introducing a platinum particle layer at the interface followed by in-situ reconstruction, allowing the platinum to dynamically dissolve and redeposit, forming a conductive network anchored across both sides of the interface. The three-dimensional continuous platinum network significantly reduces the interfacial contact resistance, and mechanical interlocking enhances interfacial stability. The hydroxylated oxides create a locally weakly alkaline environment, which, combined with the barrier effect of the platinum network, enables the non-precious metal catalyst to operate stably under pure water conditions. Simultaneously, the platinum network catalyzes the oxidation of permeated hydrogen, suppressing the risk of hydrogen embrittlement. This application ultimately achieves highly active, low-cost, and highly safe pure water electrolysis.

The invention relates to a diaphragm, an electrochemical device and an electric device, and belongs to the technical field of electrochemical energy storage. The diaphragm provided by the invention comprises a base material and a functional coating arranged on at least one side surface of the base material, the functional coating comprises a functional material, and the functional material is of a core-shell structure and comprises a core layer and a shell layer; the core layer comprises a metal-organic framework material, and the shell layer comprises silicon dioxide and a basic oxide. According to the diaphragm, the functional material is introduced into the functional coating, so that electrolyte decomposition can be effectively inhibited, the interface chemical stability of the diaphragm and the electrolyte is improved, the cycle life of the battery is prolonged, and the high-rate performance of the battery is improved.

This invention provides a low-halogen alkaline oxide composite additive for industrial silicon submerged arc furnaces and its application method. The additive contains at least magnesium and calcium source components, respectively, based on MgO and CaO equivalents. The fluxing and reinforcing component is selected from alkali metal oxides or alkaline earth metal oxides. The additive is added at a rate of 0.03-1% based on silica mass, and the halide content, based on Cl, is ≤0.5%. Using this additive can effectively reduce the softening temperature of siliceous raw materials and the reaction resistance in the furnace, reducing unit power consumption by 2-20% and increasing the daily output of the submerged arc furnace. Simultaneously, under the constraint of low halogen content, the chloride content of the microsilica powder does not increase. The calcium source component can be provided by industrial solid waste such as calcium carbide dust / calcium carbide slag and is compatible with the magnesium source, achieving stable smelting results under the condition of meeting the equivalent ratio. This invention is also applicable to the smelting of silicon-based ferroalloys such as ferrosilicon in submerged arc furnaces, helping to improve furnace stability and iron tapping smoothness.

The application discloses a method for improving the soluble zinc rate of zinc calcine, and belongs to the technical field of zinc metallurgy. The method for improving the soluble zinc rate of zinc calcine comprises the following steps: mixing high-temperature zinc calcine and an activating agent to obtain primary treated sand; and performing reduction treatment on the primary treated sand by using a reducing gas in an inert gas atmosphere to obtain modified zinc calcine; and the activating agent is a mixture of a sulfate and an alkaline oxide. Through the selection of the activating agent, the structure of the insoluble compounds such as zinc ferrite and zinc silicate in the zinc calcine can be broken, and the bound zinc element can be released, so that the soluble zinc rate of the zinc calcine can be greatly improved.

The application discloses a coating for high-performance light-weight carbon fibers and a preparation method thereof, and belongs to the technical field of functional materials. The coating uses nano titanium dioxide as a carrier, generates manganese dioxide on the surface, forms a core-shell functional powder, thereby increasing the roughness and reaction sites of the surface of the core-shell functional powder, and then the core-shell functional powder is doped with zinc. Then, using manganese and zinc as catalytic sites and acetylene as a carbon source, carbon nanotubes are generated in situ on the surface of the core-shell functional powder. When the core-shell functional powder is pickled in a concentrated nitric acid solution, zinc oxide as an alkaline oxide is dissolved out, a porous structure is formed, and a rough porous core-shell functional powder is obtained. The special core-shell structure can disperse stress through a molecular sliding mechanism, thereby improving the mechanical strength of the coating.

The invention discloses a method for preparing a high-strength composite core-shell carbon material by combining biomass with oily sludge, which comprises the following steps: crushing biomass, and sequentially carrying out grinding modification and primary pyrolysis on alkaline oxide to obtain pyrolytic oil, pyrolytic gas and modified semicoke; the pyrolytic oil, the oily sludge and the clay are blended and stirred and then are mixed and stirred with the modified semi-coke, and then the mixture is subjected to pyrolysis at 450-750 DEG C to obtain the composite core-shell carbon material which contains an active component for removing CO2, has the characteristic of high strength and can be used as a catalyst for CO2 capture and conversion or a proppant raw material in an oil field production process. The obtained pyrolysis oil can be recycled, pyrolysis gas incineration provides energy for the pyrolysis furnace, not only are environmental pollution and dependence on fossil energy reduced, but also the characteristics of agriculture and forestry waste biomass and oily sludge are fully utilized, resource application of organic waste is achieved, a high-quality carbon material is obtained, and the method has a wide application prospect.

The application belongs to the technical field of lithium ion battery materials, and discloses a dry multi-component coating method for high-nickel positive electrode materials. Two-stage solid-phase material coating treatment is performed on the surface of the high-nickel positive electrode material, weak-acid solid-phase material is coated in the first stage, and alkaline oxide, hydroxide or neutral salt is coated in the second stage. The weak-acid solid-phase material coated in the first stage can not only reduce residual alkali content, but also form a tightly contacted coating layer on the surface of the high-nickel positive electrode material, so as to limit the dissolution of residual alkali and the damage of the substrate in subsequent operation processes; the coating in the second stage further forms a tightly transition layer on the surface of the positive electrode material, which is beneficial to lithium ion transmission and is also a protective structure; the heating temperature of the coating in the first stage and the coating in the second stage is relatively low, which is beneficial to saving heat energy cost.

The invention provides a composite carrier catalyst as well as a preparation method and application thereof. The composite carrier catalyst comprises a composite carrier and an active component loaded on the composite carrier; the composite carrier comprises Al2O3, SiO2 and a basic oxide; the active component comprises a composition with a chemical formula of AuNiaCubOx in atomic ratio, the value range of a is 0.2-5, the value range of b is 0-5, and x is the total number of oxygen atoms required by valence of each element in the active component. The composite carrier catalyst provided by the invention can be used in a reaction for synthesizing methyl methacrylate through oxidative esterification of methylacrolein, has good catalytic performance, and can have the characteristics of high methylacrolein conversion rate and high methyl methacrylate yield under the condition of relatively low Au content of the catalyst.

The utility model relates to a sintering mixture alkalinity adjusting system. A plurality of material bins; the valve group is used for controlling the discharge of the materials and comprises a manual valve and an automatic valve which are arranged on the discharge port of the stock bin; the first-stage conveying assembly and the second-stage conveying assembly are arranged under the valve group, the second-stage conveying assembly is located below the first-stage conveying assembly and comprises a plurality of roller ways and conveying belts tensioned on the peripheral surfaces of the roller ways, and weighing roller ways for weighing materials are further arranged among the roller ways; the component analyzer is mounted right above the second-stage conveying assembly so as to detect the components of the materials on the second-stage conveying assembly; through the integrated component analyzer and the weighing roller way, the system can detect the components and the weight of the mixture in real time, so that the proportion of the alkaline oxide to the acidic oxide is accurately calculated, and compared with a traditional artificial experience method, the real-time performance and the accuracy are higher, and the stability of the alkalinity of the sintered ore can be ensured.

Process for the purification of a hydrocarbon stream including: a) Providing a hydrocarbon stream having a diene value of at most 1.5 g I2 / 100 g and a bromine number of at least 5 g Br2 / 100 g, and containing at least 10 wt % of pyrolysis plastic oil; d) contacting the effluent obtained in step a) with silica gel, clays, alkaline or alkaline earth metal oxide, iron oxide, ion exchange resins, active carbon, active aluminum oxide, molecular sieves, alkaline oxide 10 and / or porous supports and silica gel, or any mixture thereof; e) performing a second hydrotreating step; and f) recovering a purified hydrocarbon stream, where the second hydrotreating step is performed over at least one catalyst that presents both (i) an hydrotreating function and (ii) a trap function.

The application discloses a kind of low melting point flux for glass, by weight percentage, including the following components: SiO2 30~40%, Bi2O3 3~10%, R2O 15~25%, ZnO 10~15%, ZrO2 6~12%, B2O3 3~10%, TiO2 3~10%, Al2O3 2~6%, F 1~4%, rare earth oxide 1~3%; wherein, R2O is the basic oxide selected from Na2O, K2O and Li2O;Rare earth oxide is Y2O3 and / or La2O3;F is introduced by one or more of sodium fluosilicate, sodium fluoride, aluminum fluoride or calcium fluoride. The fast firing temperature of the low melting point flux can be as low as 590~600℃, and can be better applied to the surface of overglaze color opaque glass tableware, forming a protective film with high transparency, good color development, strong adhesion, good alkali resistance, maintaining the original color of pigment color, while significantly improving the resistance of overglaze color opaque glass tableware to dishwasher, greatly reducing the lead and cadmium leaching amount of overglaze color pigment.

The invention discloses a xanthan gum composition with stable storage. The xanthan gum composition comprises xanthan gum, a xanthan gum hydration rate retention agent and optional auxiliary materials, the xanthan gum hydration rate retention agent is selected from alkali, basic salt, basic oxide or a combination thereof, the xanthan gum accounts for 1-99% of the total weight of the xanthan gum composition, the xanthan gum hydration rate retention agent accounts for 0.1-20% of the total weight of the xanthan gum composition, and optionally, the auxiliary material accounts for 1-90% of the total weight of the xanthan gum composition. After the xanthan gum composition is stored for a long time, the hydration rate is slightly changed, and the xanthan gum composition has a longer shelf life.

The present invention provides a device for fixing and recovering carbon dioxide by passing it through a chemical agent in a compressed air circuit. [Solution] The device consists of a body, a bowl attached to the body, a hollow section, and a carbon dioxide recovery section, wherein the carbon dioxide recovery section is equipped with a basic oxide agent, the body has an inlet and an outlet for compressed air, the hollow section divides the inside of the bowl into two regions, the inside of the hollow section and the outside of the hollow section, the upper part of the hollow section is connected to the inlet or the outlet, the sides of the hollow section are permeable to the agent but do not allow it to pass through, and the carbon dioxide recovery section is located inside or outside the hollow section, and has a means for compressed air entering from the inlet to pass through the carbon dioxide recovery section and be discharged from the outlet.

The invention belongs to the technical field of brazing material preparation, and provides a flux-cored welding rod with scaling powder and a preparation method of the flux-cored welding rod. The preparation method comprises the following steps: melting, homogenizing and rapidly quenching various boron-containing fluorine-containing salts and a stabilizer, and crushing and grading to obtain amorphous glassy-state weld-aid carrier powder; mixing the hydrofluoride activated component with carrier powder and a bulking agent to obtain premixed powder, and mixing basic oxide, carbonate and phosphate to form passivated component premixed powder; then, by taking the carrier powder as a matrix, uniformly dry-mixing the premixed powder and a passivation component, spraying an absolute ethyl alcohol binder solution which takes rosin or rosin resin as a solute to prepare a wet material, and carrying out spray granulation and drying to obtain composite granulated powder; a silver-copper-zinc brazing filler metal alloy strip is rolled to form a groove, then center powder falling, pre-closing and lap joint occlusion sealing are conducted to form a pipe blank, and a finished product is obtained through sizing, cold rolling compaction, inert atmosphere annealing and multi-pass drawing. Powder feeding is stable, sealing is reliable, weld-aiding activation and post-welding passivation cooperate, and moisture absorption, caking and residue corrosion are reduced.

The invention discloses a method for preparing ethylbenzene through alcohol-mediated polystyrene catalytic hydrogenolysis and a catalyst thereof. Comprising the following steps: mixing a copper salt solution with an alkaline oxide dispersion liquid, dropwise adding an alkaline precipitator under a heating condition to adjust the pH value to 4-10, centrifuging, washing, drying and calcining to obtain the catalyst. The catalytic hydrogenolysis method comprises the following steps: adding polystyrene, a catalyst and alcohol into a reactor together, and reacting for 1-24 hours at 300-500 DEG C in an inert atmosphere to obtain ethylbenzene. The core of the method is that the alcohol is used as a reaction medium and an in-situ hydrogen source, the hydrogenolysis reaction of polystyrene is realized under the catalytic action, the dependence on high-risk and high-pressure externally supplied hydrogen in the traditional process is avoided, and the process safety is remarkably improved. And the preparation process is simple, low in cost and easy to recycle. By applying the method, the yield of light aromatic hydrocarbon can reach 70% or above, the yield of ethylbenzene can reach 42% or above, and a novel and efficient solution is provided for safe and high-valued recovery of polystyrene waste.