176 results about "Potassium oxide" patented technology

The invention discloses high-strength high-temperature-resistant fireproof industrial glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The industrial glass is prepared from the following raw materials: silicon dioxide, boric oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, a composite reinforcing component and a clarifying agent, the composite reinforcing component is prepared from hafnium oxide, gadolinium oxide and zinc oxide; the clarifying agent is obtained by mixing cerium dioxide and tin oxide. The preparation method of the industrial glass comprises the following steps: preparing functional components, melting glass, forming a glass substrate, and preparing the industrial glass. The prepared industrial glass is high in strength, good in high-temperature stability and excellent in fireproof performance.

The invention relates to the field of nuclear power operation, in particular to a control method for quantitative ammonia potassium saturation of cation resin of a primary loop purification system of a nuclear power plant. The method comprises the following steps: before starting ammonia-potassium saturation, calculating the total amount of ammonia absorbed by resin, the total amount of potassium absorbed by resin and the ideal concentration of a potassium hydroxide solution by utilizing the total exchange amount of nuclear-grade cation resins in a series I and a series II and the ammonia and potassium selectivity coefficients of the nuclear-grade cation resins; the flow of the first series and the flow of the second series are adjusted, the theoretical ammonia adding amount of the first loop under different flows of the second series is calculated, and continuous ammonia adding is conducted on the first loop with the theoretical ammonia adding amount as the target; when the series of diamino potassium is saturated, sampling and analyzing the total alkali metal content and the ammonia content from the outlets of the primary loop and the series II, and calculating and adjusting the adding amount and the frequency of the potassium hydroxide solution to ensure that the total alkali metal concentration of the main loop is in the area A and does not deviate; after the potassium ammonia saturation of the series II is finished, stopping the operation of the series I, calculating the required ammonia adding amount under the normal working condition, timely adjusting the continuous ammonia adding amount of the loop I, quitting the series I, and keeping the operation of the series II. According to the invention, smooth implementation of saturation of series of diamino potassium and safety of primary loop water quality are ensured.

This invention provides a micro-arc oxidation electrolyte for magnesium alloy surface treatment and a method for preparing a micro-arc oxidation film. The micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles; or, an aqueous solution containing sodium silicate, potassium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles. This invention also discloses a method for preparing a micro-arc oxidation film using the aforementioned micro-arc oxidation electrolyte for magnesium alloy surface treatment. The micro-arc oxidation electrolyte of this invention contains conductive ceramic nanoparticles—titanium boron carbon nitride conductive nanoparticles. Using these nanoparticles to perform a micro-arc oxidation reaction on the magnesium alloy surface can improve the microstructure of the micro-arc oxidation film, while simultaneously enhancing the corrosion resistance and wear resistance of the magnesium alloy after micro-arc oxidation treatment, significantly improving the surface protection capability of the magnesium alloy, and extending its service life.

The invention relates to potassium superoxide composite particles as well as a dry-method preparation process and a preparation system thereof, and belongs to the technical field of superoxide. The composite particle comprises a core and a shell layer, the core is a mixture of potassium superoxide and bentonite, the shell layer is a calcium hydroxide wrapping layer wrapping the core, and the core and the shell layer form a core-shell structure; the process comprises the steps of dry powder mixing, dry granulation and size stabilization, microwave strengthening and surface wrapping. The system comprises a raw material pretreatment device, a dry powder mixing device, a dry rolling granulation device, a microwave strengthening treatment device and a surface wrapping device. A dry granulation process is adopted, the risk that potassium superoxide and water are subjected to violent reaction is fundamentally eliminated, bentonite is used as an inert matrix, the effects of diluting and stabilizing potassium superoxide are achieved, the sensitivity of potassium superoxide to external stimulation is reduced, and the particle product is excellent in comprehensive performance.

The invention provides a process for purifying nickel from electrolytic waste for preparing nitrogen trifluoride, which comprises the following steps: after a nitrogen trifluoride electrolytic cell stops electrolysis, transferring the electrolytic waste into a first batching kettle, adding anhydrous hydrogen fluoride, dissolving ammonium bifluoride mixed in the electrolytic waste into a molten state, and adding a second batching kettle; then solid-liquid separation is achieved in a centrifugal mode, and the liquid part is molten liquid to be reused as electrolyte; ammonia water is added into a second batching kettle to adjust the pH value, solid-liquid separation is achieved in a centrifugal mode, the liquid part is transferred into an intermediate tank, potassium hydroxide is added to continue to adjust the pH value, nickel in the solution is precipitated out, ammonia escapes and is prepared into dilute ammonia water in a falling film absorption mode, and the dilute ammonia water can return to a system to be reused; the solid part directly enters a smelting furnace, the temperature is gradually increased until nickel is smelted into a liquid state, then cooling is conducted, and the nickel purity can reach 99% or above. According to the method, the nickel in the electrolytic waste mixed with the sediments in the nitrogen trifluoride electrolytic cell is purified, and appreciation is achieved.

The present application relates to a kind of porous silicon carbide, porous silicon carbide@G composite material and its preparation method and application, belong to the technical field of semiconductor materials.The preparation method of porous silicon carbide uses silicon carbide as anode, Pt is cathode, potassium hydroxide aqueous solution is electrolyte, control potassium hydroxide aqueous solution temperature, using two-step constant voltage constant current etching, while carrying out solution electrochemical corrosion on the surface of silicon carbide, carry out depth vapor assisted diffusion layer corrosion, obtain porous silicon carbide.The present application also obtains porous silicon carbide@G composite material by using porous silicon carbide as substrate, and in-situ graphitization is carried out on the surface of silicon carbide substrate.The present application uses potassium hydroxide to replace HF when preparing porous silicon carbide, and steam is used to improve the uniformity and etching efficiency of silicon carbide etching.The uniform mesoporous structure in the porous silicon carbide prepared after etching provides high specific surface area and optimized ion transmission path.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

This application provides an aramid slurry and its preparation method, a battery separator and its preparation method, and its application. The aramid slurry comprises aramid fibers, a non-protic strongly polar solvent, and a co-solvent. The co-solvent has a pH value of 5–7.5 at 25°C and 101.325 kPa; the rotational viscosity of the aramid slurry is 500 mPa·s–5000 mPa·s. The aramid slurry of this application eliminates the need for strong alkaline co-solvents such as sodium hydroxide or potassium hydroxide to dissolve the aramid, avoiding the damage to aramid molecules caused by such co-solvents, extending the operating time window, and improving the stability of the slurry. The slurry can be stably stored for more than 168 hours, reducing the difficulty of production operations and the investment in personnel and equipment, thus facilitating large-scale production. Furthermore, the rotational viscosity of the aramid slurry formed in this application has a suitable range; within this range, the slurry not only exhibits good stability but also provides ideal separator performance.

The invention relates to the technical field of chemical production concentration and purification, and discloses a potassium hydroxide concentration and refining process and device, the potassium hydroxide concentration and refining process comprises a shell, the shell is internally provided with a concentration assembly for concentrating a multi-stage clarified solution, and the top end of the shell is provided with a water inlet pipe communicated with an inner cavity space. According to the equipment, all parts in a concentration assembly are matched, and a gravity water supply principle is formed by utilizing the liquid level difference between a water inlet pipe and an overflow port, so that a solution sequentially flows through a first-stage middle cavity to realize primary slow flow sedimentation, secondary slow flow collection under the guidance of a water guide conical barrel and spiral slow flow separation of an inner conical barrel and a spiral strip sheet; finally, multi-stage clarification and refining of the solution are completed, the purpose of removing impurities with different particle sizes in the solution is achieved, the impurities with different particle sizes can be separated in a targeted mode through cooperation of stage slow flow and gravity settling, the refining purity of the potassium hydroxide solution is remarkably improved, and the problem that impurities are not thoroughly removed due to a single clarification structure is solved.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

The invention relates to the technical field of ceramics, in particular to glazed foamed ceramic and bubble art glaze thereof. The oxide is prepared from the following chemical components in percentage by mass: 56 + / -2% of silicon dioxide, 9.0 + / -0.5% of aluminum oxide, 8.0 + / -1% of calcium oxide, 3.5 + / -1% of magnesium oxide, 5.5 + / -1% of zinc oxide, 12.0 + / -1% of potassium oxide, 3.5 + / -1% of sodium oxide, 2.5 + / -0.5% of diboron trioxide and 0-1.5% of colored metal oxide. The foaming agent raw materials comprise high-temperature decomposition type carbonate and high-temperature reaction type silicon carbide or silicon-oxygen-carbon. The glaze surface is devitrified, opacifying and matte, the carbonate foaming agent is completely decomposed and escaped on the glaze surface in the early stage to form a rough and uneven effect, silicon carbide or silicon-oxygen-carbon reacts in an oxidizing atmosphere at 1025 + / -25 DEG C to generate foaming gas, the foaming gas is matched with a boron element, and the temperature is rapidly increased to the highest firing temperature to promote glaze bubbles to break through the glaze surface to form open bubbles.

The application provides a method for preparing offretite by using natural analcime as a raw material, the offretite and application thereof, and relates to the technical field of zeolite materials. The natural analcime is mixed with an aqueous solution of an ammonium salt to perform ion exchange, so that ammonium-type analcime is obtained; the ammonium-type analcime is calcined to obtain hydrogen-type analcime; and the hydrogen-type analcime is mixed with sodium hydroxide, potassium hydroxide and water to perform hydrothermal reaction, so that the offretite is obtained. The natural analcime is a kind of zeolite mineral widely existing in nature, and the application uses the natural analcime as a raw material, so that the application has the remarkable advantages of low price and environmental friendliness; and the traditional hydrothermal method needs 7-10 days to synthesize offretite with high crystallinity, while the application uses the natural analcime as a raw material to perform crystal transformation synthesis of offretite, so that offretite with high crystallinity can be obtained in 0.5-2 days. Moreover, the offretite provided by the application can efficiently adsorb heavy metal ions in wastewater.

The invention discloses a texturing process of a single crystal battery piece. The texturing process comprises the following steps: S1, performing pre-texturing treatment on a silicon wafer by adopting pre-texturing liquid; s2, texturing the silicon wafer by adopting texturing liquid; the prefabricated down liquid comprises polyvinylpyrrolidone and polyvinyl alcohol; the texturing liquid comprises inorganic alkali, a defoaming agent and a catalyst; the inorganic base is selected from at least one of sodium hydroxide and potassium hydroxide, and the defoaming agent is selected from at least one of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, diethylene glycol, triethylene glycol and tetraethylene glycol. The catalyst is selected from at least one of sodium 5-nitro-o-methoxyphenolate, sodium o-nitrophenolate and sodium p-nitrophenolate. A nucleating agent solution is adopted to carry out texturing pretreatment on a silicon wafer, then alkali treatment texturing is carried out on the silicon wafer, and the liquid changing period of the texturing process is long; and the cell pieces prepared by taking the polyvinylpyrrolidone and the polyvinyl alcohol as the combined nucleating agent are relatively small in inter-piece color difference.

The invention belongs to the technical field of composite coatings, and particularly relates to a copper-tin electroplating solution and a preparation method and application thereof.The preparation method of the electroplating solution comprises the steps that citric acid is dispersed in water, potassium hydroxide is added, and a reaction solution 1 is obtained; basic cupric carbonate is added into the reaction solution until the solution becomes clear and does not generate bubbles, the solution is cooled, monopotassium phosphate is added, and a reaction solution 2 is obtained; dissolving potassium stannate in a dilute alkali hot solution, and after the potassium stannate is completely dissolved, adding hydrogen peroxide to obtain a reaction solution 3; and adding the cooled reaction liquid 3 into the reaction liquid 2 to obtain the electroplating liquid. The preparation method of the electroplating solution is simple and almost free of pollution, the electroplating solution is used for electroplating a metal test piece, and an obtained plating layer has high corrosion resistance.

The invention belongs to the technical field of batteries, and discloses a preparation method of a zinc-nickel secondary battery negative electrode active material. The preparation method comprises the following steps: adding ZnO into a KOH solution of saturated ZnO, uniformly mixing, adding Ca (OH) 2, reacting, and aging to obtain the negative active material of the zinc-nickel secondary battery. A hydrothermal coprecipitation method is adopted, used raw materials comprise calcium hydroxide, zinc oxide, potassium hydroxide and the like, and a calcium zincate crystal generated in the preparation process has a quadrilateral crystal form. The crystal form of calcium zincate can be effectively stabilized by controlling hydrothermal coprecipitation conditions. The solubility of the zinc oxide in an alkaline solution is low and is far lower than that of zinc oxide. And due to the characteristic, the concentration of zincate radicals in the electrolyte is remarkably reduced, so that the growth of negative electrode dendritic crystals is effectively inhibited, and the cycling stability and the service life of the zinc-nickel battery are further improved.

The invention belongs to the technical field of battery waste recovery, and particularly discloses a method for recovering valuable metals from a positive electrode material of a waste lithium ion battery. The method provided by the invention comprises the following steps: mixing the positive electrode material of the waste lithium battery with potassium permanganate, potassium hydroxide and water, carrying out a leaching reaction, carrying out solid-liquid separation after the reaction is completed, adding potassium carbonate into filtrate to carry out a precipitation reaction, carrying out solid-liquid separation to obtain filtrate and lithium carbonate precipitate, adjusting the pH value of the filtrate to 6.5-7.5, and carrying out solid-liquid separation to obtain a potassium manganate solution. According to the method, the valuable metals in the positive electrode material of the waste lithium battery can be selectively recycled under the normal-pressure mild condition, and the chemical reagent is recycled by utilizing the disproportionation reaction, so that the production cost is reduced.

The invention belongs to the technical field of labor protection articles, and particularly relates to an environment-friendly butyronitrile glove and a preparation method thereof.The environment-friendly butyronitrile glove comprises a glove core, an environment-friendly butyronitrile rubber layer is fixed to the outer surface of the glove core in a gum dipping mode after the glove core is soaked in pretreatment liquid, and the environment-friendly butyronitrile rubber layer contains carboxyl butyronitrile latex; the environment-friendly butyronitrile rubber material is prepared by firstly pretreating carboxyl butyronitrile rubber latex and then mixing the pretreated carboxyl butyronitrile rubber latex with sodium dodecyl benzene sulfonate, a 5% potassium hydroxide solution, a 50% zinc oxide dispersion liquid, a 50% sulfur dispersion liquid, a 50% zinc dimethyldithiocarbamate dispersion liquid, a 50% titanium dioxide dispersion liquid, color paste and an alkali swelling type thickening agent. According to the invention, triple synergy of standard environmental protection, stable performance and controllable cost is realized, the industrial problem that protection performance, environmental benefits and economical efficiency are difficult to consider in the prior art is solved, and the dual requirements of modern environmental protection and use experience are met.

The invention discloses a potassium ferrate bottom-oriented enrichment slow-release agent and a preparation method and application thereof, and belongs to the technical field of bottom-oriented enrichment slow-release agents, and the preparation method comprises the following steps: S1, adding polyethylene glycol into water glass, dissolving, adding lithium hydroxide, acidifying, aging, washing, drying, grinding and calcining to obtain a modified carrier; s2, adding a potassium hydroxide solid into the hypochlorous acid solution, adding ferric hydroxide, continuously adding the potassium hydroxide solid, stirring at constant temperature, reacting to obtain a black purple solution, cooling, filtering and drying to obtain a potassium ferrate crude product; s3, adding the potassium ferrate crude product in the S2 into a 3M potassium hydroxide solution for dissolving, adding the modified carrier in the S1, stirring under an ultrasonic condition, then adding a potassium hydroxide solid to be saturated, keeping the temperature, standing, carrying out suction filtration, cleaning a filter cake, and drying to obtain a composite material; s4, grinding and sieving the composite material obtained in S3, mixing with a bottom enrichment agent, and tabletting to obtain a potassium ferrate bottom enrichment slow-release agent; the pond substrate can be improved.

The invention provides a surface treatment method which is suitable for a metal base material, and the metal base material is provided with an appearance surface. The surface treatment method includes the following steps. The method comprises the following steps of: firstly, performing surface sand blasting treatment on the appearance surface to form a sand blasting surface; then, an electrolyte is matched, and micro-arc oxidation treatment is performed on the sand blasting surface, so that a micro-arc oxidation surface is formed. Then, forming a coating to cover the micro-arc oxidation surface; wherein the electrolyte comprises the following components: sodium phosphate, sodium silicate, sodium aluminate, potassium fluoride, potassium hydroxide, ammonium vanadate, potassium vanadate, disodium ethylene diamine tetraacetate (Na2EDTA) and sodium tetraborate.

The invention relates to a spraying granulation fertilizer, a preparation method and application thereof, and the preparation method comprises the following steps: S1, mixing weathered coal or lignite, potassium hydroxide and lignin liquid, and carrying out fermentation reaction in an alkaline environment to obtain active primary pulp rich in potassium fulvate; s2, mixing the active raw stock obtained in the step S1 with a nitrogen source, a phosphorus source, a potassium source, a medium element compound and a trace element compound according to a ratio, grinding into slurry, and reacting under an alkaline or neutral condition, so that inorganic nutrients and fulvic acid radicals in the active raw stock are preliminarily integrated; s3, adding an acidity regulator into the slurry after the reaction in the step S2, regulating the pH value of the slurry to a weak acidic range of 5.5-7.0, and carrying out a reaction, so that all components in the slurry form a stable water-soluble complex structure under a weak acidic condition; and S4, carrying out spraying granulation on the slurry reacted and filtered in the step S3 at 1000-1200 DEG C to obtain the granular fertilizer.

The invention relates to a system for converting, at least partially and without combustion, into electrical energy of chemical energy included in an electrolytic solution, being also a subject of the invention, comprising copper hydroxide, potassium hydroxide, ethanol with an alcohol content greater than 90% and double-distilled water. The system (1) comprises an electrolytic cell (3) for subjecting the aforesaid electrolytic solution to electrolysis, and a fuel cell (25) for producing electrical energy from the aeriform mixture generating in the electrolytic cell (3). A further solution (26), also electrolytic, exits from the fuel cell (25) and is re-introduced into the electrolytic cell (3) by means of the passage through a recovery tank (28). The invention further relates to a process, also actuatable by means of the aforesaid system (1), for converting, at least partially and without combustion, into electrical energy the chemical energy included in the aforesaid electrolytic solution.

This utility model relates to the field of ion-exchange membrane electrolysis technology, specifically to an ion-exchange membrane electrolyzer for potassium hydroxide production, comprising a tank body, a temperature control component, a sealing component, a diaphragm component, and a discharge component. The temperature control component includes a heating wire, a temperature control plate, a heat-conducting plate, and a sealing ring. The heating wire is detachably connected to the tank body and located inside the tank body. There are two temperature control plates, each fixedly connected to the heating wire and located on the outside of the tank body. The heat-conducting plate is fixedly connected to the tank body and located inside the tank body. The sealing ring is fixedly connected to the heat-conducting plate and located between the heat-conducting plate and the tank body. The sealing component is connected to the tank body, the diaphragm component is connected to the sealing component, and the discharge component is connected to the tank body. This invention solves the problem that during use, the temperature of the ion-exchange membrane electrolyzer is difficult to control, which easily leads to slow reactions within the electrolyzer and reduced processing efficiency.

The invention relates to a method capable of inhibiting large arc ablation in a micro-arc oxidation process, which comprises the following steps: placing a to-be-treated workpiece in a micro-arc oxidation solution, and carrying out micro-arc oxidation treatment to finally obtain a product, the micro-arc oxidation solution comprises the following components: 10-40 g / L of sodium silicate, 2-5 g / L of potassium hydroxide and 0.2-0.6 g / L of a lanthanum compound, wherein the particle size of the lanthanum compound is 100-120 nm. The method has the effects that part film layer ablation is improved, and generation of abnormal large electric arcs is effectively restrained.

The invention aims to provide a novel lead-free imitation crystal frit, which belongs to the technical field of glassware manufacturing, and comprises the following components in percentage by mass: 69.95-70.2% of lead-free imitation crystal frit; the content of Al2O3 is 7.82 to 7.90 percent; 2.33% to 2.45% of K2O (potassium oxide); na2O: 11.50% to 11.60% of the total weight of the 0.22% to 0.31% of CaO; 0.010%-0.016% of MgO (magnesium oxide); fe2O3: 0.032% to 0.042%; 1.85% to 1.93% of Ba; zn: 4.95 to 5.05%; and B: 0.763% to 0.771%. The formula glass frit does not contain a lead component harmful to a human body, the use safety is improved, and various indexes of glass prepared by melting the glass frit are close to or exceed those of natural crystals.

The invention discloses an iron-based catalyst, a preparation method of the iron-based catalyst, and an electrothermal catalytic synthesis ammonia method and system, and belongs to the field of synthesis ammonia catalysts, the iron-based catalyst comprises the following components by mass: 30-90% of a catalyst main component FeO1-x, 5-40% of a catalytic promoter and 10-80% of a conductive additive; the value range of x in the FeO < 1-x > is 0.01 to 0.1; the catalytic promoter comprises potassium oxide, aluminum oxide and alkaline earth metal oxide; the conductive auxiliary agent comprises at least one of a carbon-containing material and a conductive metal compound. The catalytic activity of the iron-based catalyst is effectively improved mainly through catalyst component design and dosage optimization. When the device is applied to an ammonia synthesis process, low-temperature, low-pressure and efficient electro-thermal catalytic ammonia synthesis is realized under the condition of no external heating, the ammonia production rate is remarkably increased, meanwhile, the ammonia production energy consumption is reduced, and the industrial application prospect is excellent.

A process for preparing an inorganic resin water-based plasticizer is disclosed. This invention relates to the field of water-soluble silicate inorganic resin technology. The process involves taking 100 parts of water, adjusting the pH to 12 with liquid potassium hydroxide or sodium hydroxide, adding 40-50 parts of polyalkylsiloxane, heating to 140-160°C, reacting for 1.5-2.5 hours until the reactants are completely transparent, then cooling down; cooling to 95-100°C, maintaining the temperature, adding 100 parts of silica sol and 200-300 parts of catalyst A, and cooling to room temperature after the mixture changes from turbid to completely transparent. Then, adding 20-30 parts of protective solution B and stirring until homogeneous. Alkylation treatment of the inorganic resin causes the rigid structure of the silica molecular chain to generate alkyl branches, achieving toughening, plasticizing, strengthening, and water resistance.

The application discloses an organic complex of different metals LTG-RuCe and a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the organic complex of different metals LTG-RuCe comprises the following steps: synthesizing a ligand HL by using methyl formylbenzoate, 2-acetylpyridine, ethanol, potassium hydroxide and ammonia water; synthesizing a ligand [Ru(HL)2]·(PF6)2 by using trichlororuthenium, the ligand HL, methanol, potassium hydroxide and HPF6; and synthesizing the organic complex of different metals LTG-RuCe by using cerium nitrate hexahydrate, the ligand [Ru(HL)2]·(PF6)2 and N,N-dimethylformamide. The organic complex of different metals LTG-RuCe synthesized by the application has high CO2 catalytic activity, good repeatability and a structure which is not easy to collapse; and the method for preparing the organic complex of different metals provided by the application has high yield and strong operability.

The application belongs to the technical field of cement materials, and discloses a low-carbon cement using high-alkali lithium slag endogenous alkaline activated mineral admixture and a preparation method thereof. The low-carbon cement comprises the following components: cement clinker 40wt%-50wt%; activated high-alkali lithium slag 30wt%-40wt%; fly ash 10wt%; and mineral powder 10wt%. The total content of sodium oxide and potassium oxide in the high-alkali lithium slag is 10wt%-18wt%, and the content of amorphous phase in the high-alkali lithium slag after activation is not less than 50.7wt%. The application uses the activation and replacement of high-alkali lithium slag, can greatly reduce or even eliminate the use of exogenous alkali activator, thereby reducing the related cost of the exogenous alkali activator, reducing the use of strong alkali, and reducing the safety risks, durability problems and environmental pollution problems derived from the storage, transportation and application of related raw materials.

The invention belongs to the technical field of brazing materials, and particularly relates to a synthesis method of a nanoscale hydroxyl fluorine metal acid potassium / sodium brazing flux for aluminum brazing. The aluminum hydroxide, the potassium hydroxide / sodium hydroxide / calcium hydroxide / magnesium hydroxide and the hydrofluoric acid aqueous solution are used as main raw materials, the novel aluminum brazing flux is prepared in the presence of an organic solvent / water mixed system, and the prepared brazing flux has the advantages of being low in melting point, small in particle size, concentrated in distribution and high in dispersion stability; the comprehensive performance is obviously superior to that of the brazing flux prepared by a traditional method; the prepared brazing flux is low in cost, convenient to use, good in film forming effect, low in dosage and high in surface smoothness after brazing.

The invention discloses a preparation method of polyether polyol for flatulence slow-rebound foam, and relates to the technical field of polyether polyol synthesis, and the preparation method comprises the following steps: S1, preparing an initiator: mixing glycerol and potassium hydroxide for reaction, dehydrating for 1-3 hours at 110-120 DEG C under vacuum condition to obtain potassium glycerol with the water content of less than or equal to 0.05%, and filtering to obtain the initiator; wherein the mass ratio of potassium hydroxide to glycerol is 1: (13-20); s2, carrying out two-stage polymerization reaction; and S3, refining treatment. In the middle stage of the reaction, the feeding proportion of the epoxide is changed, the proportion of the ethylene oxide is increased, and a non-ethylene oxide end-capping process is adopted to prepare the swellable slow-rebound polyether polyol. When the process is used for producing polyether, the reaction speed of epoxypropane in the early stage of reaction is higher, meanwhile, the situation that the production period is prolonged due to intermediate curing is avoided, and the production efficiency is improved. The polyether applying the process has better performance during foaming, has stronger adaptability to a formula, and avoids wettability reduction of foam and foam shrinkage during foaming caused by ethylene oxide end capping.