155 results about "Oxychlorination" patented technology

The invention provides a method for screening activated carbon to catalyze chlorine oxidation to remove manganese, and belongs to the technical field of water treatment, catalysis and computational chemistry. The method for screening the activated carbon for catalytic manganese removal comprises the following steps: acquiring different physicochemical characteristic indexes of different activated carbon, wherein the physicochemical characteristic indexes are obtained by performing physicochemical characterization on the activated carbon; manganese removal efficiency indexes of different activated carbon are obtained, wherein the manganese removal efficiency indexes are obtained through tests of activated carbon catalytic oxychlorination manganese removal; performing correlation analysis on different physicochemical characteristic indexes and manganese removal efficiency indexes of different activated carbon, and determining a decisive index of activated carbon catalytic oxychlorination manganese removal according to a Pearson's correlation coefficient; performing linear regression fitting on at least one index in the decisive indexes and a manganese removal efficiency index to obtain a fitting coefficient; and screening out target activated carbon suitable for catalytic manganese removal according to the fitting coefficient, and predicting the catalytic oxychlorination manganese removal efficiency of the target activated carbon.

The invention discloses compression-resistant glass and a preparation method thereof, and relates to the technical field of special glass. When the compression-resistant glass is prepared, an anorthite crystal phase is used as a main material, a wollastonite crystal phase is used as an auxiliary material, and zinc, barium, boron, sodium, antimony and titanium elements are added, so that the compression-resistant glass ceramic is prepared; the preparation method comprises the following steps: mixing tetraethoxysilane, zirconium oxychloride octahydrate and 3-glycidyl ether oxypropyl trimethoxy silane, adding hydrochloric acid, and stirring to obtain modified sol; the preparation method comprises the following steps: mixing hydroxyl-terminated polysiloxane, trimethyl ethyoxyl silane, methyl triethyoxyl silane and octadecyl triethyoxyl silane, adding a hydrochloric acid solution, and reacting to prepare an organosilane modified solution; mixing the modified sol and the organosilane modified solution, coating the surface of the compression-resistant microcrystalline glass with the mixture, and curing to obtain the compression-resistant glass. The compressive glass prepared by the invention has the advantages of high compressive strength, hydrophobicity, wear resistance and high surface hardness.

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 technical field of petrochemical industry, and discloses a dehydrogenation catalyst regeneration method, which comprises: (1) carrying out first charring on a spent catalyst in a first-stage charring zone, and carrying out second charring on the spent catalyst in a second-stage charring zone; (2) enabling the product after the second charring to pass through a drying zone, an oxychlorination zone and a cooling zone to obtain a regenerated catalyst; wherein gases discharged from the first-section charring area, the second-section charring area and the oxychlorination area are respectively and independently circulated. According to the method, the drying area is arranged below the scorching area, so that independent circulation of gases in the scorching area and the oxychlorination area is realized, the noble metal dispersity of the low-carbon alkane dehydrogenation catalyst can be improved, and the regeneration effect of the catalyst is improved.

The invention provides a neutralization and utilization method of an acidic waste etching solution. The method comprises the following steps: mixing the acidic etching waste liquid with an ammonium bicarbonate solution; in the mixing process, the mixing temperature is controlled to be 40-60 DEG C, the pH value is adjusted to be 3.5-4.5, and slurry is obtained; separating the slurry to obtain copper oxychloride wet crystals and an ammonium chloride crude product solution; carrying out dechlorination treatment on the copper oxychloride wet crystals by using an alkaline solution, and filtering to obtain a copper oxide filter cake and chloride waste liquid; the temperature of the dechlorination treatment is 70-90 DEG C; performing post-treatment on the copper oxide filter cake to obtain copper sulfate; and carrying out precipitation treatment on the ammonium chloride crude product solution to obtain an ammonium chloride finished product solution. Wherein the step S3 and the step S4 have no sequence. According to the method, electroplating-grade copper sulfate and industrial-grade ammonium chloride products are prepared by using ammonium bicarbonate and realizing full utilization of anions and cations in the acidic etching waste liquid.

The invention relates to a Zr-MOF-based functional flame retardant and 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 amino-containing dicarboxylic acid is 1: 1, the mass ratio of organic acid to water is x: (100-x), 1 < = x < = 40, stirring reaction is carried out at 50-100 DEG C for 0.5-12 h, paraformaldehyde and a phosphorus-containing flame retardant are added, stirring reaction is carried out at 50-100 DEG C for 0.5-12 h, and the Zr-MOF-based functional flame retardant is obtained. Wherein the molar ratio of the amino-containing dicarboxylic acid to the paraformaldehyde to the phosphorus-containing flame retardant is 1: (1-2): (1-2), the molar ratio of the paraformaldehyde to the phosphorus-containing flame retardant is 1: 1, then continuously reacting for 4-8 hours at the temperature of 70-100 DEG C, and after the reaction is finished, filtering, washing and drying to obtain the Zr-MOF-based functional flame retardant.

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.

The invention relates to the technical field of catalyst preparation, and provides an ethylene oxychlorination catalyst and a preparation method thereof, and a method for preparing 1, 2-dichloroethane through ethylene oxychlorination. The gamma-Al2O3 and the Y-type molecular sieve are used as the composite carrier, so that the composite carrier has a unique pore structure, adjustable acid-base property and excellent thermal stability to resist formation of carbon deposition. Due to the unique pore structure of the composite carrier, the active components can be more uniformly distributed on the composite carrier, the agglomeration of the active components is reduced, the effective utilization rate of the active components is enhanced, and the high activity of the reaction is kept. According to the ethylene oxychlorination catalyst disclosed by the invention, gamma-Al2O3 and the Y-type molecular sieve are taken as the composite carrier, and the active component copper element is combined, so that the ethylene oxychlorination catalyst can realize oxychlorination of ethylene under normal pressure, the hydrogen chloride conversion rate is high, and the selectivity of 1, 2-dichloroethane is high.

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.

A nano-suspension dispersion of dicopper chloride trihydroxide and the preparation of a nano-suspension dispersion with the particle size of less than 100 nanometers, especially less than 50 nanometers. The present invention belongs to the field of nano pesticides, and particularly relates to a pesticide variety insoluble in water and a solvent. The nano-suspension dispersion of dicopper chloride trihydroxide is a nano-suspension in which dicopper chloride trihydroxide particles are dispersed in a water-soluble polymer dispersant that is present in the form of a random coil structure in water.

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.

The invention provides a flocculating agent for synchronously removing ammonia nitrogen and phosphorus as well as a preparation method and application thereof, and relates to the technical field of wastewater treatment. The flocculating agent for synchronously removing ammonia nitrogen and phosphorus comprises the following components in parts by weight: 40-50% of kaolin, 20-30% of bentonite, 5-8% of sodium carbonate, 70-100 parts of water, 10-15% of zirconium oxychloride and 5-10% of lanthanum cerium chloride, 20-26 parts of sodium hydroxide is added, and the mass ratio of zirconium oxychloride to lanthanum cerium chloride is 7: 9. The mass ratio of the sodium carbonate to the zirconium oxychloride is 5: 2. The inorganic flocculant is firstly added for primary treatment, and then the high-molecular-weight flocculant is added for fine treatment, so that the effect is better than that of single use of one flocculant, and the sewage treatment efficiency can be improved.

The present invention discloses a production process of zirconium oxychloride and zirconium oxychloride. The process comprises the following steps: 1) Using zirconium tetrachloride as a raw material, preparing a first zirconium oxychloride solution; 2) Using high-purity zirconium oxychloride as a raw material, preparing a second zirconium oxychloride solution; 3) Simultaneously starting natural cooling for the first zirconium oxychloride solution and the second zirconium oxychloride solution. After the second zirconium oxychloride solution starts to crystallize, adding a preset mass of the second zirconium oxychloride solution to the first zirconium oxychloride solution to obtain a mixed solution; 4) Naturally cooling the mixed solution, and after crystallization, obtaining zirconium oxychloride crystals. The process of the present invention starts from a zirconium oxychloride solution, controls the crystallization process, reduces the impurity content in zirconium oxychloride, and improves the quality of zirconium oxychloride. The zirconium oxychloride of the present invention controls the crystallization process during crystallization, obtains crystals with higher purity, reduces the number of crystallization times, thereby achieving the improvement of the quality of zirconium oxychloride products and indirectly reducing the production cost of enterprises.

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 discloses a double-sided glass magnesium rock wool manual purification board and a preparation method thereof, belonging to the technical field of manual purification board preparation. The double-sided glass magnesium rock wool manual purification board is composed of the following components in parts by weight: 20-30 parts of modified rock wool, 30-50 parts of glass magnesium board, 10-13 parts of adhesive, and 6-9 parts of modified hydrophobic coating. Among them, the modified rock wool is prepared from 4,4'-diaminodiphenyl ether, pyromellitic dianhydride, zirconium oxychloride octahydrate, rock wool substrate and diatomite, and the modified hydrophobic agent is prepared from octafluoropentanol, isophorone diisocyanate 、 3-aminopropene, polyethylene glycol dimethacrylate and acrylic acid. The double-sided glass magnesium rock wool manual purification board prepared by this method has excellent moisture-proof performance, fire resistance and mechanical properties.