7 results about "Aluminum oxide hydroxide" patented technology

The present invention relates to an improved catalyst for MWCNT production. The present invention also relates to an iron-free supported catalyst for the selective conversion of hydrocarbons into carbon nanotubes, said catalyst comprising cobalt and vanadium as active catalytic metals in any oxidation state on a catalyst support comprising hydroxyl alumina, wherein: - the mass ratio of cobalt to vanadium is between 2 and 15; - the mass ratio of cobalt to aluminum is between 5.8 x 10 ‑2 and 5.8 x 10 ‑1 ; and - the mass ratio of vanadium to aluminum is between 5.8 x 10 ‑3 and 8.7 x 10 ‑2 . The present invention also relates to a method for the preparation of said iron-free supported catalyst and to a method for the preparation of carbon nanotubes using said iron-free supported catalyst.

A one-component powder coating composition is provided comprising a curable resin and one or more curing additives for curing the curable resin, wherein the powder coating composition comprises: one powder coating component comprising the curable resin and the one or more curing additives; and 1.0 to 20 wt % of a dry-blended inorganic particulate additive consisting of inorganic components i), ii), and iii), wherein component i) is non-coated aluminium oxide or non-coated silica, component ii) is aluminium hydroxide and / or aluminum oxyhydroxide, and component iii) is silica, and wherein the powder coating component has a particle size distribution with a Dv90 of at most 50 μm and a Dv50 of at most 30 μm.

The application discloses an alloy heat-resistant anticorrosive paint, a preparation method and a use method, and belongs to the technical field of anticorrosive paints. The alloy heat-resistant anticorrosive paint comprises the following components in parts by weight: 25-42 parts of epoxy resin, 18-30 parts of phenolic resin, 10-15 parts of a polycarbonate-rubber-inorganic filler ternary compound, 1-5 parts of a curing agent, 3-5 parts of aluminum hydroxyl oxide, 5-10 parts of flaky mica powder and 30-50 parts of a solvent. The application constructs a brand-new anticorrosive paint system, which can form a tough and dense protective film on the surface of an alloy, effectively insulates corrosion medium, and still has excellent protection efficacy in a harsh environment with variable conditions.

The invention discloses a lithium battery composite membrane and a preparation method thereof, and belongs to the technical field of lithium batteries, the composite membrane comprises a base membrane and a coating layer coated on one side or two sides of the base membrane; slurry of the coating layer is obtained through graft copolymerization of EVA, polyamic acid and aluminum oxide, the EVA is hydrolyzed to generate hydroxyl, the aluminum oxide is modified by amino silane to introduce amino, and then the aluminum oxide is subjected to graft copolymerization with the polyamic acid. According to the invention, combination of PI, EVA and alumina is realized through graft copolymerization, multi-component molecular-level compounding is realized, the cost is reduced, and the EVA has low density, so that the mass of a coating layer can be reduced, and the influence on the energy density of a battery is reduced. Based on the combination of a rigid material of PI and aluminum oxide and an EVA flexible material, the provided diaphragm is more tightly attached to a positive electrode material and a negative electrode material, the thermal stability and the mechanical property of the diaphragm are enhanced, and the electrolyte wettability of the diaphragm is good.

The application discloses a preparation method of sintered artificial marble, and comprises the following steps: (1) preparation of fillers; (2) preparation of glaze; (3) preparation of artificial marble blank; (4) coating of glaze; (5) sintering, cooling, polishing and modification of the artificial marble blank with surface glaze obtained in the step (4), so as to obtain the sintered artificial marble. The preparation method of the sintered artificial marble can enhance the glaze surface of the artificial marble by using the water bath heating synthesized sodium fluoride nano-silicon dioxide and hydroxyl aluminum oxide modified graphene oxide composite material, and can significantly improve the compactness and scratch resistance of the surface of the artificial marble; the nano-silicon dioxide can well compensate the holes on the surface of the glaze of the artificial marble; the fibrous hydroxyl aluminum oxide and the layered graphene oxide are in synergistic effect, and after sintering, the hydroxyl aluminum oxide and the graphene oxide are tightly connected to form a network structure in the glaze, so that the compactness and hardness of the glaze are improved, and the friction resistance and scratch resistance of the surface of the artificial marble are enhanced.

This invention relates to a method for calculating the crystallinity of aluminosilicate adjuvants based on XRD peak shape weighting analysis, belonging to the field of materials analysis technology. The method includes: loading raw XRD data and defining the analysis range; performing baseline correction using the asymmetric least squares method; finding peaks based on standard peak positions and determining the full width at half maximum (FWHM) based on the actual peak centers using Gaussian fitting; calculating the contribution weight of each diffraction peak to crystallinity based on the FWHM using a weighting function, where a smaller FWHM indicates a higher weight; calculating the weighted area of ​​each peak and the total integral area of ​​the corrected spectrum; and finally calculating the percentage of crystallinity based on the ratio of the weighted total area to the total area. This invention, by introducing peak shape weighting analysis, quantifies the impact of diffraction peak broadening on crystallinity assessment, significantly improving the reliability of aluminosilicate adjuvant crystallinity calculation and providing a solution suitable for high-throughput calculation of aluminosilicate crystallinity.

The invention discloses a fluorine recovery method and recovery device adaptive to high and low fluorine-containing wastewater, and the method is characterized in that free switching between a calcium fluoride homogeneous crystallization mode and a calcium fluoride heterogeneous crystallization mode of the fluorine-containing wastewater is realized by adjusting the dosage and reaction time of calcium salt and polyaluminum chloride, so that the fluorine recovery method can be adaptive to fluorine recovery of wastewater with different fluorine concentrations; afterwards, calcium fluoride crystal products and hydroxyl aluminum oxide flocs are finally obtained through solid-liquid separation, alkalization treatment, acidification treatment and other means, and the hydroxyl aluminum oxide flocs are recycled. According to the method disclosed by the invention, the fluorine in the wastewater with different fluorine concentrations can be recovered by combining the calcium salt and the polyaluminum chloride, and the method is simple in process equipment, simple and convenient to operate, low in cost and high in purity of the recovered product.