123 results about "Oxychlorination" patented technology

This invention discloses a method for preparing high-purity zirconium oxide, belonging to the field of compound preparation technology. The method provides a breakthrough adjustment of the final concentration state and the cooling process after concentration and evaporation of an acidic zirconium oxychloride solution under the action of an oxidant. Simultaneously, crystallization is achieved through a two-stage concentration and evaporation process, followed by calcination to obtain hafnium-free zirconium oxide. The resulting zirconium oxide not only has a high yield but also high purity. Furthermore, the technical solution of this invention avoids the generation of ammonia nitrogen wastewater as in existing technologies, thus not only avoiding environmental impact but also significantly reducing production costs through the recycling of hydrochloric acid condensation, achieving a green and environmentally friendly effect.

The invention discloses a flexible lanthanum zirconate-alumina fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of inorganic nonmetal ceramic fiber materials. The preparation method comprises the following steps: dissolving zirconium oxychloride octahydrate, lanthanum chloride heptahydrate and aluminum chloride hexahydrate into absolute methanol, sequentially adding acetylacetone and triethylamine, stirring, and drying under reduced pressure to obtain a zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride; soaking the zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride in acetone, standing, filtering, concentrating under reduced pressure, and drying to obtain a zirconium-lanthanum-aluminum acetylacetone polymer precursor; the preparation method comprises the following steps: preparing a spinning solution from a zirconium-lanthanum-aluminum acetylacetone polymer precursor, absolute methanol serving as a solvent and polyoxyethylene serving as a spinning aid, and carrying out electrostatic spinning on the spinning solution to obtain a lanthanum zirconate-aluminum oxide precursor fiber membrane; and performing heat treatment on the lanthanum zirconate-aluminum oxide precursor fiber membrane to obtain the flexible lanthanum zirconate-aluminum oxide fiber membrane. According to the preparation method, acetylacetone is added into zirconium oxychloride, lanthanum chloride and aluminum chloride for coordination to form a linear zirconium-lanthanum-aluminum acetylacetone polymer, so that the technical problem that lanthanum zirconate long fibers with high strength and good flexibility are difficult to obtain is solved.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

The invention relates to the field of hydrometallurgy, and discloses a method for converting hafnium oxalate feed liquid into hafnium oxychloride feed liquid, which is characterized by comprising the following steps: adding an HCl solution and an oxidizing agent into the hafnium oxalate feed liquid, and reacting at a certain temperature to obtain a hafnium oxychloride solution. The method has the advantages of simple operation, no introduction of any metal impurity ions, small reagent consumption, low energy consumption, low cost, high efficiency, no physical state change, and realization of continuous production. The method for adding the HCl solution and the oxidizing agent into the oxalate feed liquid is also suitable for converting oxalate solutions of other metal ions into chloride solutions, including but not limited to zirconium oxalate, titanium oxalate, thorium oxalate, scandium oxalate, niobium oxalate, tantalum oxalate, vanadium oxalate, cobalt oxalate, cesium oxalate and rubidium oxalate.

A catalyst regeneration gas loop is operated in a heat exchanger decoking mode. A regeneration gas is diverted away from a burn zone of the catalyst regeneration gas loop and to a heat exchanger, where coke deposits are disposed on a surface of the heat exchanger. The regeneration gas is prevented from flowing to an oxychlorination / calcination zone of the catalyst regeneration gas loop. Within the heat exchanger, the coke deposits are combusted with oxygen of the regeneration gas, thereby removing the coke deposits from the surface of the heat exchanger and producing carbon dioxide. Oxygen is replenished to the regeneration gas. The regeneration gas is recycled to the heat exchanger.

The invention belongs to the technical field of zirconium oxychloride preparation, and particularly relates to a preparation method of zirconium oxychloride. The preparation method of the zirconium oxychloride comprises the following steps: (1) carrying out acid leaching on waste fused zirconia corundum brick powder; (2) alkali fusion roasting of filter residues; (3) leaching with hot water and refluxing with hydrochloric acid; (4) purification treatment; and (5) post-treatment. According to the preparation method of the zirconium oxychloride, the waste fused zirconia corundum brick powder is used as a raw material, the problem of solid waste disposal of retired waste fused zirconia corundum bricks of a glass kiln is solved, efficient recycling of resources is achieved, a non-renewable resource zircon sand raw material is partially replaced, and the production cost is reduced; the high-purity zirconium oxychloride is prepared through acid leaching, alkali fusion, hot water leaching, hydrochloric acid reflux conversion, purification and aftertreatment.

The invention belongs to the technical field of auxiliary preparation, and provides a curing material applied to a flameless combustion process of copper-containing sludge and a preparation method. The preparation method comprises the following steps: firstly, mixing iron nitrate nonahydrate, ferrous sulfate heptahydrate, a manganous nitrate solution and citric acid to prepare a ferrite precursor; further, a rare earth phosphate nano dispersion is synthesized through a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, and ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate radicals and fluorine ions; meanwhile, multi-element co-doped amorphous powder is prepared through a sol-gel method, tetraethoxysilane serves as a silicon source, zirconium oxychloride octahydrate, tetra-n-butyl titanate and niobium pentachloride are supplemented, a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment, and the high-temperature mechanical property is provided; and finally, mixing kaolin or bentonite mineral powder with the synthesized ferrite precursor, the rare earth phosphate nano dispersion, the multi-element amorphous powder and other auxiliaries to form slurry, and drying to form the curing material.

The invention relates to the technical field of alloy additives, and discloses a high-toughness corrosion-resistant manganese additive for aluminum alloy and a preparation and application method thereof.The additive is prepared from, by mass, 50-65 parts of nanometer manganese alloy powder, 10-18 parts of magnesium-zirconium composite modifier, 4-9 parts of titanate coupling agent, 3-6 parts of dispersing aid and 2-5 parts of high-temperature stabilizer; the magnesium-zirconium composite modifier is a compound system of magnesium nitrate and zirconium oxychloride, and the molar ratio of magnesium element to zirconium element in the magnesium-zirconium composite modifier is 3: 1-5: 1. The dispersion uniformity of the additive is larger than or equal to 96%, after the additive is added, the impact toughness of the aluminum alloy is improved by 45%, the salt spray corrosion resistance reaches 600 h or above, the high-temperature (300 DEG C) stability is improved by 30%, the additive is suitable for various aluminum alloy systems such as 2024 and 6063, the preparation cost is reduced by 22%, and the industrial prospect is wide.

The invention provides an ultrafast synthesis method of rare earth oxychloride. The ultrafast synthesis method comprises the following steps: step 1, preparing a powder precursor; and 2, putting the powder precursor into a graphite tube, and carrying out heat treatment by adopting a rapid Joule heating technology to obtain the rare earth oxychloride material. The method is simple in process, energy consumption is reduced by 90% or above compared with traditional roasting, no organic solvent is needed, and the product is high in crystallinity and controllable in morphology.

The utility model belongs to the technical field of zirconium oxychloride preparation, and particularly relates to a stirring device for preparing zirconium oxychloride, which comprises a blanking barrel, a stirring barrel and a stirrer, the blanking barrel is connected with the stirring barrel through a spiral conveyor, a liquid inlet pipe and a liquid outlet pipe are arranged on the stirring barrel, the stirrer is rotatably connected in the stirring barrel, and the liquid outlet pipe is connected with the liquid outlet pipe. The stirring barrel comprises a shell, a heat preservation layer, a heating piece and an inner container, the heat preservation layer is arranged in the shell, the heating piece is arranged in the heat preservation layer, the inner container is arranged in the heating piece, and waste heat utilization mechanisms are arranged on the discharging barrel and the liquid outlet pipe; compared with the prior art, the liquid outlet pipe preheating device has the advantages that the liquid outlet pipe can be preheated to preheat zirconium oxychloride, energy is saved, and production efficiency is improved.

The application belongs to the technical field of auxiliary agent preparation, and provides a solidified material applied to copper-containing sludge flameless combustion process and a preparation method; firstly, iron nitrate nonahydrate, ferrous sulfate heptahydrate, manganese nitrate solution and citric acid are mixed to prepare ferrite precursor; further, rare earth phosphate nanodispersion is synthesized by a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate and fluoride ions; meanwhile, multi-component co-doped amorphous powder is prepared by a sol-gel method, tetraethyl orthosilicate is used as a silicon source, zirconium oxychloride octahydrate, titanium acid tetrabutyl ester and niobium pentachloride are used as auxiliary materials, and a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment to provide high-temperature mechanical properties; finally, kaolin or bentonite mineral powder is mixed with the above-synthesized ferrite precursor, rare earth phosphate nanodispersion, multi-component amorphous powder and other auxiliary agents, a slurry is formed, and the slurry is dried and formed into a solidified material.

The present invention belongs to the field of nanopowder materials technology, specifically relating to a nanoscale yttrium-stabilized zirconium powder and its preparation method. The preparation method comprises the following steps: uniformly mixing zirconium oxychloride with yttrium oxide, aluminum oxide, copper oxide, magnesium oxide, cerium oxide, calcium oxide, and lanthanum oxide, followed by a single high-temperature calcination to obtain a precursor powder; then subjecting the precursor powder to a primary grinding, impurity removal, and spray drying. After drying, the precursor powder is subjected to a secondary high-temperature calcination. The resulting secondary calcined powder is then subjected to a secondary grinding and impurity removal, followed by the addition of additives, uniform mixing, and spray granulation to obtain the nanoscale yttrium-stabilized zirconium powder. The nanoscale yttrium-stabilized zirconium powder of the present invention has: ZrO2+HfO2≥90%, Y2O3=2.50-9.91%, and T+C phase ≥96%. The nanoscale yttrium-stabilized zirconium powder provided by the present invention has high stability, high activity, and high toughness. The present invention also provides a preparation method with low production costs and a stable production process.

The present invention discloses a method for preparing ultrafine particles of low-dielectric ceramic materials for 6G, relates to the technical field of dielectric ceramic materials, and belongs to patent classification number C04B35 / 00. The specific preparation method is to first prepare a sol using tetraethyl orthosilicate, calcium nitrate, magnesium nitrate, aluminum isopropylate, zirconium oxychloride and lithium nitrate, heat the sol and let it stand for gelation, then use supercritical CO2 to dry, obtain aerogel, heat and reduce calcination to obtain (Ca, Mg) SiO3-ZrO2 nanopowder, and use atomic layer deposition technology to coat a TiO2 layer on the surface of the nanopowder to obtain ultrafine particles of dielectric ceramic materials. The ceramic particles prepared by the present invention not only have a low dielectric constant, but also have a smaller particle size and a higher density under low-temperature sintering.

This invention discloses an energy-enhancing water-based fracturing fluid, its preparation method, and its application, relating to the field of oilfield fracturing fluid technology. The preparation method includes: adding N,N-dimethylformamide as a solvent, then adding 2,3-epoxypropyl octadecenoic acid and acetic acid, followed by post-treatment to obtain solid intermediate monomer I; mixing sodium bisulfite with water and adding monomer I, along with an appropriate amount of catalyst, followed by treatment after the reaction to obtain intermediate monomer II; adding a zirconium salt solution of zirconium oxychloride dropwise to the monomer II solution and adjusting the pH to obtain a crosslinking agent. The crosslinking agent is then added to a guar gum thickener for crosslinking to obtain the fracturing fluid. The fracturing fluid uses viscosity-reducing molecules as ligands to synthesize an organozirconium crosslinking agent. During the crosslinking process, the original coordination bonds in the crosslinking agent break, releasing viscosity-reducing molecules, thereby enhancing the strength, solubility, and emulsifying and dispersing ability of the crosslinking agent. This imparts viscosity-reducing capabilities to the fracturing fluid, simplifying the process, shortening the time, and improving efficiency.

A catalyst for an oxychlorination process of hydrocarbons, a preparation method thereof, and a method for preparing an oxychlorination compound of hydrocarbons using the same.

The invention belongs to the technical field of adsorption materials, and particularly relates to a coupling adsorption material containing zeolite and biomass charcoal as well as a preparation method and application of the coupling adsorption material. The coupling adsorption material is composed of modified zeolite, modified coconut shell biomass charcoal and a silane coupling agent interface bonding layer. After the modified zeolite is modified by three steps of hydrochloric acid, ammonium oxalate and sodium chloride, skeleton exchange sites are unified to be Na < + > type, and the NH < 4 + > interception capability is enhanced; after the modified coconut shell biomass charcoal is oxidized by nitric acid and modified by zirconium oxychloride and phosphoric acid, ammonia nitrogen is removed through multi-mechanism synergy; after two-phase coupling, the ammonia nitrogen removal capability is superior to that of a single component. The silane coupling agent interface bonding layer effectively buffers interface thermal stress generated by mismatching of two-phase thermal expansion coefficients in the high-temperature regeneration process, inhibits microcrack initiation and expansion, guarantees the adsorption capacity stability after multiple regeneration cycles, and prolongs the service life of the material.

The invention discloses a preparation method of a composite nanofiltration membrane, which is characterized in that the surface of an ultrafiltration membrane is coated with natural low-cost biological materials carrageenan and sodium carboxymethyl cellulose, so that the environmental friendliness and technical feasibility in the field of water treatment are enhanced; the preparation method comprises the following steps: firstly preparing a composite membrane, then carrying out cross-linking modification on the surface of the membrane through aldol condensation reaction, and constructing a compact and stable three-dimensional network structure selection layer after cross-linking, so that the composite membrane keeps structural stability under extreme pH conditions and in an oxychlorination environment, meanwhile, the composite membrane is endowed with efficient nanofiltration performance, and the composite membrane can be practically applied to industrial chromium-containing wastewater.

The invention belongs to the technical field of petrochemical industry, and discloses a method for regenerating a platinum-tin dehydrogenation catalyst by using chlorinating agent steam, which comprises the following steps: adding a chlorinating agent into a bubbler, and adjusting a water bath to a preset temperature; preset gas is connected to the front end of the reactor through the bubbler; placing the inactivated platinum-tin dehydrogenation catalyst in a reactor, heating the reactor to a roasting temperature, and roasting in an oxygen-containing atmosphere; adjusting the temperature of the reactor to oxychlorination temperature, setting the preset flow of the preset gas, introducing oxygen-containing gas to stabilize the chlorinating agent of the influent section at the preset concentration, and treating for a period of time under the condition; the protective gas purges and displaces gas in the reactor and the pipeline; and adjusting the reactor to a reduction temperature, introducing a reducing gas, and carrying out a reduction reaction to obtain the regenerated platinum-tin dehydrogenation catalyst. Under the condition of not depending on ultra-low flow precise injection equipment, controllable adjustment and long-term stable maintenance of the ppm-grade chlorine content in the reaction atmosphere are realized.

The invention relates to the technical field of polyester synthesis, and discloses a preparation method of a composite metal catalyst and application of the composite metal catalyst in polyester synthesis, and the preparation method comprises the following steps: (1) weighing zirconium oxychloride to prepare a zirconium solution, weighing copper nitrate to prepare a copper solution, and weighing citric acid to prepare a chelating solution; (2) adding the chelating solution into a zirconium solution, heating and stirring, adding a copper solution, and continuously heating and stirring to obtain a mixed solution; (3) adding ammonia water into the mixed solution to adjust the pH value to 5-6 to obtain sol; (4) standing for gelation, removing impurities, and carrying out solvent replacement by adopting ethanol to obtain gel; and (5) drying and roasting the gel to obtain the composite metal catalyst. The composite metal catalyst with higher catalytic activity and selectivity is obtained by optimizing the preparation steps, the zirconium-copper ratio and other condition parameters, and the food-grade polyester product with high tensile strength, high viscosity and low haze is prepared by applying the composite metal catalyst to the polyester synthesis reaction.

The invention discloses a catalyst for preparing N-(1-ethyl propyl)-3, 4-dimethylaniline through continuous catalytic hydrogenation and a preparation method and application thereof, the catalyst comprises a carrier, and an active component platinum and an auxiliary component which are loaded on the carrier, the auxiliary component is at least one of sodium citrate, disodium ethylene diamine tetraacetate, sodium metavanadate, oxalic acid, zirconium oxychloride, yttrium nitrate or sodium carbonate; and the active component and the auxiliary component both account for 0.1-10% of the mass of the catalyst. The catalyst is used for preparing N-(1-ethyl propyl)-3, 4-dimethylaniline through hydrogenation, the reaction can be continuous, the safety performance is better, and the catalyst has high catalytic activity and stability.

The invention provides a metal chlorination and oxidation method based on an electromagnetic induction ceramic rotary furnace and the ceramic rotary furnace, and belongs to the technical field of metal reaction. The oxidation method comprises the following steps that a metal raw material is crushed and then mixed with a chlorinating agent and an oxidizing agent, and a mixed material is obtained; the rotating speed of the electromagnetic induction ceramic furnace is adjusted to be 5-30 r / min, and protective gas is introduced into the furnace; starting an electromagnetic induction power supply, heating an inductor in the furnace through an electromagnetic induction coil outside the furnace, raising the temperature in the furnace to a target reaction temperature, and keeping the temperature; continuously or intermittently feeding the mixed material into the electromagnetic induction ceramic furnace, and dynamically mixing under the rotation of the furnace body to carry out chlorination and oxidation reaction; a gaseous product generated by the reaction is recovered by a condensation system, and a solid product is discharged from a discharge end and then is collected. The method has remarkable advantages in the aspects of reaction efficiency improvement, environmental protection and the like, and has wide application prospects and market values.

The invention discloses a preparation method and application of a zirconium-based metal organic gel material, and the preparation method comprises the following steps: (1) adding zirconium oxychloride into distilled water, stirring and dissolving at room temperature to obtain a zirconium oxychloride solution; (2) adding trimesic acid into absolute ethyl alcohol, and stirring and dissolving at room temperature to obtain a trimesic acid solution; (3) mixing the zirconium oxychloride solution and the trimesic acid solution at room temperature, and continuously stirring to obtain a mixed solution; and (4) carrying out hydrothermal reaction on the mixed solution, naturally cooling to room temperature after the reaction is finished, and carrying out freeze drying to obtain the zirconium-based metal organic gel material. The prepared zirconium-based metal organic gel material is used for treating pulp wastewater with the pH value of 2-12 and containing lignin and / or humic acid organic matters, and the problem that when an existing metal organic gel material is used for treating the pulp wastewater, the pH application range is narrow can be solved.

This invention discloses a method and application for the industrial-scale preparation of zirconium-based composite nano-metal oxides based on MOF morphology, belonging to the field of zirconium-based multi-component composite material preparation and its application in new energy batteries. Porous zirconium dioxide is obtained by reacting 2-aminoterephthalic acid with zirconium oxychloride followed by pyrolysis to create pores. Then, a soluble salt containing magnesium, iron, and aluminum is uniformly precipitated into the reactant to prepare a zirconium-based ternary precursor material. Finally, the product is obtained through rapid plasma sintering. This method, based on MOF morphology inheritance and multi-level structure design of composite oxides, innovatively synthesizes a novel nano-additive for lithium-ion batteries. The zirconium-based composite nano-metal oxide product prepared by this invention exhibits uniform particle morphology distribution, high sphericity, and a high specific surface area. Furthermore, when used as a cathode material additive, this zirconium-based composite nano-metal oxide can improve the electrochemical performance of ternary lithium batteries.

The invention provides a method for preparing high-purity hafnium oxide by an alkali fusion crystallization method, which comprises the following steps: melting a hafnium oxide raw material, solid alkali and a fluxing agent to obtain an alkali fusion clinker; adding the alkali fusion clinker into deionized water, leaching and filtering to obtain hafnium hydroxide precipitate; adding the hafnium hydroxide precipitate into concentrated sulfuric acid to obtain a hafnium sulfate solution; adding hydrogen peroxide into the hafnium sulfate solution for oxidation pretreatment; evaporating, concentrating and crystallizing the hafnium sulfate solution subjected to oxidation pretreatment to obtain hafnium sulfate crystals; adding the hafnium sulfate crystal into concentrated hydrochloric acid, refluxing, evaporating, concentrating and crystallizing to obtain a hafnium oxychloride crystal; dissolving the hafnium oxychloride crystal in water, and adding oxalic acid to generate hafnium oxalate precipitate; and calcining the hafnium oxalate precipitate. According to the process, the purity of hafnium oxide is improved to 99.995% or above, the impurity content is lower than 10 ppm, and the process is short, low in cost and environmentally friendly.

The invention relates to a method for synchronously recovering germanium tetrachloride from a metal-state regenerated germanium raw material through oxychlorination, and belongs to the technical field of germanium extraction metallurgy. The method comprises the following steps: mixing a metal-state regenerated germanium raw material with hydrochloric acid in a chlorination distillation kettle, dropwise adding a hydrogen peroxide solution in sections to react with hydrochloric acid to generate a high-activity chlorine species, and directly oxidizing and chlorinating metal germanium to generate germanium tetrachloride. In the process, the reaction is a strong exothermic reaction, a product is distilled out by using heat released by the reaction, and the reaction temperature is controlled at 82-84 DEG C through a cooling medium. And after the reaction is basically completed, carrying out deep distillation through a heating medium, and finally condensing and collecting to obtain a germanium tetrachloride product. According to the method, a traditional multi-step process is integrated into one step, the process is short, alkali liquor does not need to be added, reaction heat is fully utilized, the energy-saving effect is remarkable, the germanium direct recovery rate is high, and the problems that a traditional method is long in process, high in energy consumption, large in auxiliary material consumption and low in direct recovery rate are effectively solved.

The application relates to the technical field of wastewater treatment, in particular to a vinyl chloride production method and a production device. The vinyl chloride production method comprises the following steps: taking hydrogen chloride, oxygen and ethylene as main raw materials to generate high-temperature gas containing dichloroethane through an oxychlorination reaction; cooling the high-temperature gas by using a quenching medium, wherein the quenching medium does not contain alkaline substances; separating dichloroethane A from the cooled gas; adding lye into first wastewater; precipitating metal ions in second wastewater and adsorbing organic matters in the second wastewater; performing steam stripping on third wastewater to obtain fourth wastewater and dichloroethane B; generating vinyl chloride monomer by using dichloroethane, wherein the dichloroethane comprises the dichloroethane A and the dichloroethane B; mixing the fourth wastewater and an oxidizing agent to perform catalytic oxidation treatment. The application can solve the problem that wastewater treatment is difficult in VCM production, improve the plugging problem of a wastewater stripping tower and solve the problem that a difficult biochemical treatment system is unstable.

The application discloses a micro-slit net interface modified far-end strong sand-carrying fracturing fluid and a preparation method thereof, and relates to the technical field of oil and gas field exploitation. The fracturing fluid comprises, in terms of weight parts, 20-50 parts of low-molecular-weight polyacrylamide, 10-30 parts of polyhydroxyethyl acrylamide, 30-75 parts of diethylene glycol ethyl ether acetate, 2-10 parts of fumed silica, 3-12 parts of a titanate coupling agent, 2-7 parts of a gemini cationic surfactant, 2-7 parts of an alkyl polyoxyethylene ether, and 2-7 parts of an intermediate S. The intermediate S comprises, in terms of weight parts, 10-25 parts of zirconium oxychloride, 5-25 parts of sodium lactate, and 65-85 parts of diethylene glycol ethyl ether acetate. The preparation comprises the following steps: S1, preparation of the intermediate S; and S2, preparation of the finished product R. The fracturing fluid has the characteristics of high resistance reduction, low damage and strong sand carrying, and can realize gas guiding and oil increasing by modifying the surface characteristics of reservoir rocks, thereby improving the yield of oil and gas wells.

Zr-MOF-based functional flame retardant as well as a preparation method and application thereof, zirconium oxychloride, amino-containing dicarboxylic acid, organic acid and water are mixed, the molar ratio of zirconium oxychloride to the amino-containing dicarboxylic acid is 1:1, the mass ratio of the organic acid to water is x:(100-x), wherein 1<=x<=40, stirring reaction is carried out at 50-100 DEG C for 0.5-12 h, then polyformaldehyde and phosphorus-containing flame retardant are added, wherein the molar ratio of the amino-containing dicarboxylic acid, the polyformaldehyde and the phosphorus-containing flame retardant is 1:(1-2):(1-2), the molar ratio of the polyformaldehyde to the phosphorus-containing flame retardant is 1:1, then 70-100 DEG C continues to react for 4-8 h, after the reaction is finished, filtration, water washing and drying are carried out, and the Zr-MOF-based functional flame retardant is obtained.

The invention discloses a method for preventing and treating peronophythora litchii, relates to the technical field of peronophythora litchii, and aims to promote disease-resistant varieties and vertical-resistant varieties to control occurrence of peronophythora litchii, the method has a good short-term effect but cannot last for a long time, and the variety with horizontal resistance has relatively stable disease resistance, which is the key point of current breeding. In production, a disease-resistant variety should be selected according to the epidemic degree of peronophythora blight, the sensitive period of the litchi peronophythora blight is a flowering period and a coloring and mature period, and in prevention and treatment, pesticide should be applied in three key periods, namely after flower thinning and shortening, when female flowers bloom and a litchi coloring period; after an orchard is cleaned and fruits are harvested, deadwood on trees and diseased fruits and rotten fruits on the ground are removed in combination with pruning, the fruits are burnt down in a concentrated mode, then a 1% copper sulfate solution is sprayed on soil below tree crowns, and 600-fold liquid of 30% copper oxychloride suspension or 800-fold liquid of 77% Kovalerate wettable powder is sprayed on the tree crowns once.

The invention relates to the technical field of concrete materials, and particularly discloses a preparation process and application of a zirconium-silicon-aluminum multi-core complexing type anti-cracking anti-dispersing agent, and the preparation process comprises the following steps: (1) dropwise adding a silicate solution into an aluminum sulfate solution, and shearing and stirring in the process to obtain a reaction solution a; (2) dropwise adding concentrated sulfuric acid into the reaction liquid a under a stirring condition, and heating for reaction after completion to obtain a reaction liquid b; (3) dropwise adding a modification solution formed by zirconium sulfate and zirconium oxychloride into the reaction solution b under a stirring condition, and reacting to obtain a reaction solution c; and (4) sequentially adding ATMP, liquid polyethylene glycol and tartaric acid into the reaction liquid c, and reacting under heating and stirring conditions. And adjusting the pH value of the reaction system to obtain the composite anti-cracking agent. The anti-cracking agent prepared by the invention can synchronously realize dispersion resistance, crack resistance and durability improvement, and solves the problem that dispersion resistance and crack resistance of underwater non-dispersible concrete are difficult to consider at the same time.