555 results about "Aluminium isopropoxide" patented technology

The invention discloses a preparation method of integrated large-hole alumina, belonging to a preparation technique of integrated multi-hole inorganic oxide. The method comprises the following process: reverse concentrated emulsion method is adopted to prepare integrated large-hole organic template taking cinnamene and divinylbenzene as monomer; aluminum isopropoxide or pseudoboehmite is primarily used for preparing Al2O3 hydrosol; the Al2O3 hydrosol is filled into the integrated large-hole organic template; the filled integrated organic/inorganic composites are dried and then are roasted to remove the template, so as to obtain the integrated large-hole alumina. The invention has the advantages of simple and feasible preparation process, moreover the prepared integrated large-hole alumina has micrometer grade communicated large-hole channels (1-50um). The invention is applicable for catalyst carrier, absorption materials and separation materials.

The invention discloses a hierarchical pore ZSM-5 molecular sieve and a synthetic method thereof. The hierarchical pore ZSM-5 molecular sieve is formed by the accumulation of crystalline grains with order nano-layered structures and is integrally structured. The synthetic method comprises the following steps of: with quaternary ammonium salt as a structure-directing agent (SDA), tetraethoxysilane (TEOS) as a silicon source, aluminium isopropoxide (AIP) as an aluminum source, and potassium hydroxide (KOH) as an alkali source, adding a cationic surface active agent (CSF) to prepare a synthetic liquid with the molar ratio of (20-100) SiO2: (1-3) Al2O3: (10-30) SDA: (10-50) KOH: (1,000-3,000) H2O: (1-10) CSF; adding 10 to 20% of Silicalite-1 molecular sieve seed crystal gel; performing hydrothermal crystallization according to the conventional method; processing a product by washing, drying and roasting to obtain the ZSM-5 molecular sieve. The molecular sieve is an agglomeration which is formed by the self-assembly under mutual effect of CSF, seed crystal gel and an inorganic species and is of a lamella and hierarchical zeolite structure; the molecular sieve is relatively high in specific surface area, relatively short in a diffusion path and relatively high in stability. The preparation method also has the advantages of high degree of crystallinity, high yield and simple operation steps, and is easy to separate.

This invention discloses a porous ceramic filtration plate coated with nanoscale ceramic filtration film for liquid-solid separation. The nanoscale ceramic filtration film is prepared by: hydrolyzing aluminum isopropoxide, preparing a sol with HNO3, refluxing, aging to form aluminum sol, adding Al2O3 nanopowder, mixing, dispersing to form uniform nanoscale film gel, uniformly coating onto the surface of a substrate by Czochralski method, drying and sintering. The obtained porous ceramic filtration plate can effectively block the majority of fine particles in ore slurry, and has such advantages as no blockage, long service life and wide applications.

The invention relates to a preparation method for alumina-zirconia ceramic fiber. The method comprises the following steps: utilizing aluminium isopropoxide, formic acid, zirconium acetate and/or additive to prepare spinnable colloidal sol precursor, adopting a centrifugal fiber forming technology to prepare gel fibre, and then calcining to obtain the alumina-zirconia ceramic fiber with the diameter of 1 to 8 micrometers. The colloidal sol prepared by the invention is stable in framework, cheap in used raw materials, mild in fiber forming condition and simple in preparation process. The calcined ceramic fiber is good in flexibility and low in heat conductivity coefficient, and can be used for high temperature thermal insulation material.

The invention discloses a multistage pore structure nano molecular sieve catalyst, belonging to the field of materials and catalysts. A preparation method of the catalyst comprises the following steps of: mixing tetraethoxysilane, aluminum isopropoxide and an organic template agent to obtain a molecular sieve original solution; directly adding organosilane into the molecular sieve original solution, and grafting organosilane to a ZSM-5 molecular sieve under condensation and flux conditions; and roasting to remove the organosilane and the organic template agent. The multistage pore structure nano molecular sieve catalyst with micropores and mesopores can be obtained by using the method, contains nano particles with proper nano particle size, has high stability and is applied to macromolecule reactions.

The invention discloses a quick synthesis method for a nano-scale ZSM-5 molecular sieve. The method includes process steps: (1), uniformly mixing aluminum isopropoxide, tetraethoxysilane, tetrapropylammonium hydroxide with water, stirring for ageing, drying aged sol-gel into dry gel, and grinding the dry gel into powdered dry gel powder to obtain dry gel seed crystal; (2), mixing water, silicon source and aluminum source into mixed solution, uniformly stirring, adding the mixed solution into the dry gel crystal seed, and uniformly stirring; (3), placing the mixed solution added with the dry gel crystal seed into a reaction kettle for static crystallization to obtain a crystallized product; and (4), taking out the crystallized product for washing, drying and roasting to obtain the nano-scale ZSM-5 molecular sieve. The dry gel serving as the crystal seed is added into ZSM-5 mixture, to induce quick formation of molecular sieve crystal during crystallization to realize quick synthesis of the ZSM-5 molecular sieve. The quick synthesis method for the nano-scale ZSM-5 molecular sieve has the advantage of simplicity, time saving, easiness to get raw materials, low cost, low pollution and high product crystallinity.

The invention discloses abrasion-resistant paint and a preparation method thereof. The paint comprises a first component and a second component, wherein the first component is double-component composition formed by mixing of a component A and a component B in a ratio of 1:1, the component A in the first component comprises components as follows: E-20 epoxy resin, silicon carbide micro powder, carbon monofluoride and a coupling agent; the component B in the first component comprises components as follows: methyl methacrylate, butyl acrylate, aluminum isopropoxide, triethoxy vinyl silane and 20-25 parts of a solvent; the second component comprises components as follows: a curing agent, an antifoaming agent, a leveling agent and a solvent. The components A and B in the first component are prepared separately and then mixed, and finally, the first and second components are cured to obtain the abrasion-resistant paint.

The invention provides a lithium ion battery anode material Li1+x[Ni(1/3-y)Co(1/3-y)Mn(1/3-y)M3y]1-xO2-zFz-Al(OH)3 (wherein M can be Mg, Al, Cr, Fe or Ti; x is not less than 0 and not more than 0.15; and z is not less than 0 and not more than 0.1) and a manufacturing method thereof. The method comprises the following steps of: doping a metal element M in LiCo1/3Ni1/3Mn1/3O2 by adopting a codeposition method to form a precursor; then calcining the precursor and a lithium salt doped with LiF at the temperature of 950-1000 DEG C to from an intermediate; next, preparing an Al(OH)3 emulsion from aluminium isopropoxide, isopropanol and distilled water; and finally adding the intermediate into the emulsion, stirring for 4-6 hours at the temperature of 45-55 DEG C, filtering and drying to form the anode material of the invention.

The invention relates to a preparation method of aluminum oxide ceramic continuous fiber, which comprises the following steps of: preparing a sol spinnable precursor by use of inorganic aluminum salt, aluminum powder, aluminum isopropoxide, nitric acid and crystal grain inhibitor; spinning gel fiber by a dry spinning technology; and performing drying and high-temperature calcination to obtain the aluminum oxide ceramic continuous fiber with diameter of 10-60 microns. According to the invention, the prepared sol system is particularly stable, the cost of the raw materials is low, and the preparation process is simple; and the filament can be obtained without adding auxiliaries such as macromolecules and the like. The filamentation environment is mild in the dry spinning. The calcined ceramic continuous fiber has flexibility and can be used as reinforcement in a composite material to improve strength and heat resistance of the material.

The invention discloses a preparation method for high-purity flaky alumina, belonging to the technical field of preparation of special powder. The preparation method comprises the following steps: with high-purity aluminum isopropoxide with a purity of 99.999%, pure water and isopropanol as main raw materials and ammonium bifluoride or ammonium fluoride as a crystal morphology controlling agent, dissolving the high-purity aluminum isopropoxide in isopropanol to prepare a solution A; preparing a solution B from pure water, isopropanol and ammonium bifluoride; then gradually adding the solution A into the solution B drop by drop at a certain addition speed; carrying out a reaction under the conditions of heating and stirring so as to produce hydrated alumina; and then successively carrying out filtering, drying and roasting so as to obtain the high-purity flaky alumina. The high-purity flaky alumina prepared by using the method has crystal grain thickness of no more than 1.0 [mu]m, a radial size of 5 to 20 [mu]m, a smooth surface, a flaky shape, no agglomeration and crystal twinning, and good dispersibility, and can be used in fields like cosmetics, pearlescent pigment, high-grade coatings and fine ceramics.

The invention relates to a 1206 lubricating grease, comprising the following components by weight percent: 2-4% of aluminum isopropoxide, 4-6% of aminated bentonite, 3-5% of stearic acid, 1-3% of benzoic acid, 37-41% of viscous oil in refined naphthenic base, 29-43% of viscous oil in refined paraffin base, 1-3% of zinc dialkyl dithiophosphate, 1.6-2.9% of triazole fatty acid ammonium salt, 0.1-0.5% of a triazole derivative, 0.8-1.8% of tricresyl phosphate, 1.2-5% of polyisobutene and 0.7-1% of ethyl carbamate. Compared with the prior art, the 1206 lubricating grease is high in dropping point, large in sintering load data and relatively good in compression and wear resistance, and the more outstanding feature is as follows: the steel mesh is excellent in oil dividing, the embodiment 3 is 1/10 of the 1275 grease of LE company of America, and the embodiment 1 is not greater than 1/8; obviously, the pollution in the operation is smaller, the resource can be saved more, and the operation period of the equipment can be prolonged.

The invention discloses a compound aluminum-base lubricating grease composition and a preparation method. The composition is prepared from the following components in percentage by weight: 70-85% of basic oil, 3-10% of a compound aluminum soap thickening agent, 5-15% of bentonite, 5-15% of a dispersant, 0.5-5% of an anti-wear reagent at an extreme pressure, 0.5-3% of an antioxidant and 0.1-1% of an antirust agent, wherein the basic oil is selected from one or a mixture of refined mineral oil, synthetic oil, poly-alpha olefin and ester oil. The preparation method comprises the following steps: fusing benzoic acid, stearic acid and aluminium isopropoxide in the basic oil to be mixed for reaction; refining at a high temperature after a period of time; then, adding the basic oil and cooling; then adding organic bentonite, uniformly mixing, adding a dispersant; and after a period of time, adding residual basic oil and finally grinding to grease. The compound aluminum-base lubricating grease composition disclosed by the invention has a good thick temperature performance and the preparation method adopts a one-step saponification compound process, so that the preparation process is simplified and the preparation efficiency is improved.

The invention discloses a method for preparing polyvinylidene fluoride/aluminum oxide hybridization film, comprising taking polyvinylidene fluoride to be dissolved into solvent; after fully dissolving the polyvinylidene fluoride, adding aluminium isopropoxide and coupling agent into the solution in a stirring state; adding water for hydrolyzation, adding acid for catalysis, and then adding pore-forming agent; stirring for at least 20h to obtain even casting film liquid, and standing still at the room temperature; scraping the casting film liquid into a panel film at the room temperature, placing the panel film in the air, soaking in coagulating bath, and forming a hyperfiltration film; and soaking the hyperfiltration film in the water, and taking out to be dried. The method uses strong chelating ligand and high activity aggregation group to respectively carry out chemical modification on PVDF organic macromolecule and Al2O3 inorganic precursor, so that the hybridization film prepared by a sol-gel method maintains the excellent chemical stability and mechanical performance of a PVD film; furthermore, the hydrophilicity and the film contamination resistance of the hybridization film are added, so that the separation property and the stability of the film can be remarkably improved.

The invention relates to a preparation method of a LiAlO2-coated lithium manganese oxide spinel cathode material. The preparation method comprises the steps of: (a) blending electrolytic manganese dioxide, lithium carbonate and chromium oxide at a molar ratio of Li to Mn of 0.51, and a molar ratio of Cr to Mn of 0.026, crushing and mixing; (b) sintering the material mixture in an air sintering furnace, grinding, sieving, and mixing for the second time; (c) placing the mixed material in the air sintering furnace, and keeping temperature for 10 to 20 hours; (d) blending the product sintered for the second time with lithium fluoride, crushing, and mixing; (e) placing the mixture obtained in the step (d) in the air sintering furnace to obtain LiMn1.95Cr0.05O3.95F0.05; and (f) preparing a 0.2mol/L mixed solution containing lithium hydroxide monohydrate and aluminium isopropoxide, and coating to obtain the final product, namely LiAlO2-coated LiMn1.95Cr0.05O3.95F0.05. The capacity and the cycle performance of the cathode material can be improved effectively by modifying the lithium manganese oxide spinel cathode material by coating.

The invention belongs to the technical field of inorganic materials and relates to a method for preparing high-purity pseudo-boehmite. The method for preparing the high-purity pseudo-boehmite comprises the following steps: under the condition of stirring, adding hydrolysate containing a pore-forming agent into an aluminium isopropoxide-isopropanol solution according to a given ratio, and carrying out hydrolysis reaction at the temperature of 60-80 DEG C for 2-8 hours, wherein the hydrolysate containing the pore-forming agent is prepared from deionized water and isopropanol in a mass ratio of 1:(0.5-3) and in ratio by amount of substance of (2-20):1; drying hydrolysis products at the temperature of 60-260 DEG C, so that the high-purity pseudo-boehmite is obtained. The method for preparing the high-purity pseudo-boehmite has the advantages that no waste is discharged in the whole preparation process, and an environment-friendly technology is realized; and meanwhile, a reaction flow is simple, and control is easy.

The invention discloses a desulphurization and denitration catalyst. The catalyst comprises the following components by mass percentage: 4 to 18 percent of CuO, 80 to 95 percent of gamma-Al2O3, and 1 to 2 percent of promoter. A method for preparing the catalyst comprises the following steps: (1) adding aluminum isopropoxide into distilled water, stirring the mixture, adding a nitric acid solution into the mixture dropwise, and carrying out the evaporation in the air to obtain a boehmite sol; (2) adding the promoter into a copper nitrate solution, then adding the mixture into the boehmite sol, then adding the nitric acid solution dropwise, stirring the mixed solution for ageing, and aggregating the mixed solution into a semi-gel; and (3) adding the semi-gel dropwise into a gel pool containing ammonia water and liquid paraffin through a dropper, and obtaining the catalyst after ageing, drying and baking. The prepared catalyst can be used for synchronous desulphurization and denitration, and can be regenerated and used cyclically with low raw material cost. As the byproducts can be reutilized, the catalyst brings about no secondary pollution.