52results about How to "High rare earth content" patented technology

The invention relates to a high Cu-RE refining agent which has high efficiency and low burning loss rate and can be used for copper and copper alloy, applied to mass refining of the copper and the copper alloy, especially applied to refining and modification of red impure copper and white impure copper. The Cu-RE interalloy refining agent is prepared by a vacuum melting method, wherein, rare earth content is up to 30-65%; and only 2-6g/kg refining agent is added while the Cu-RE interalloy refining agent is applied to remelting refining of scrap copper. The Cu-RE refining agent enhances slagging and deslagging of copper fused mass, reduces deleterious substances in the fused mass of the scrap copper, and improves texture and performance of the copper and the copper alloy, therefore, products prepared from the red impure copper as a raw material reach or exceed the quality of the products prepared from electrolytic copper as a raw material, and the white copper process waste can be used for directly producing high-quality products after remelting refined, thus promoting recycle and reutilization of the scrap copper, saving energy and resource, reducing environmental pollution and generating significant economic and social benefits.

The invention relates to a rare earth zirconium-based composite oxide with a core-shell structure and a preparation method and application thereof. The rare earth zirconium-based composite oxide comprises, 5 to 95 mol% of a rare earth oxide and 95 to 5 mol% of a zirconium oxide; the rare earth zirconium-based composite oxide has a core-shell structure, and a difference between the content of the rare earth oxide in an internal layer and the content of the rare earth oxide in an external layer is more than 10% (relative content). The rare earth zirconium-based composite oxide with high temperature stability prepared by using the method provided in the invention has the advantages of low cost, high product quality and a specific surface area of more than 40 m<2>/g after ageing for 4 h at a temperature of 1000 DEG C and can be extensively used in fields like rare earth catalytic additives, oxygen storage materials, oxygen conduction materials, ceramic powder materials and oxygen sensors. The preparation method provided by the invention has the advantages of a wide source of the raw materials rare earth and zirconium, easiness, small investment for desired equipment, low preparation cost and good development and application prospects.

The invention provides a preparation method of a rear earth Y type molecular sieve. The method comprises the following steps: firstly mixing a NaY molecular sieve, a rare earth chloride solution and deionized water to perform ion exchange, adding an oxalic acid solution in exchange fluid to enable unexchanged rear earth to be completely precipitated, adding rare earth chloride in a filter cake after filtration, so as to perform ion exchange with the deionized water, obtaining a filter cake and reuse filtrate through filtering, and performing muffle roasting on the filter cake, so as to obtaina product REY; completely or partly replacing the rare earth chloride solution with the reuse filtrate, and performing the ion exchange process of the next batch of NaY molecular sieve. The method canrecycle rear earth, ensures that the use ratio of rear earth almost reach 100 percent under the condition that equipment is not added, reduces the production cost, efficiently utilizes nonrenewable rear earth resources, can obtain REY with high content of rear earth, has the advantages of high activity and heat stability; in addition, the heavy oil fluid catalytic cracking activity of the molecular sieve is obviously improved after the formed REY is cleaned through channels of oxalic acid.

The invention relates to the technical field of rare-earth permanent magnet materials, in particular to a high-cost-performance rare-earth permanent magnet prepared from a sintered neodymium-iron-boron recycled material and a preparation method of the high-cost-performance rare-earth permanent magnet. The permanent magnet at least comprises two main phases, the first main phase component is a sintered neodymium iron boron recycled material phase, and the second main phase component is a high-abundance rare earth-based permanent magnet phase. According to the invention, the sintered neodymium iron boron reclaimed material and the high-abundance rare earth element are effectively utilized, a grain boundary phase is provided by the high-abundance rare earth phase, and the microstructure of the magnet is controlled by the processes of multiple times of powder mixing, low-temperature sintering and the like, so that the manufacturing cost of the magnet is greatly reduced, and meanwhile, thegood comprehensive magnetic performance is obtained.

The invention discloses an ultra-stabilization treatment method of a high-rare-earth-content in-situ crystallization catalyst. The ultra-stabilization treatment method includes that the ultra-stabilization catalyst high in rare earth content and lower than 2.455nm in lattice constant is prepared by high-temperature hydrothermal calcining of NaY-type catalyst for in-situ crystallization under different temperature gradient conditions after multiple times of exchange of ammonium ions and rare earth ions. The high-rare-earth-content in-situ crystallization catalyst has the advantages of high rare earth content, high silicon-aluminum ratio, high activity, high stability and excellent coke selectivity.

The invention relates to a method for synthesizing rare-earth containing MFI zeolite. The method is mainly used for solving the problem in the prior art that the content of rare earths in MFI zeolite crystals is low. According to the method for synthesizing the rare-earth containing MFI zeolite, by adopting the technical scheme that the rare-earth containing MFI zeolite is obtained through mixing a rare-earth containing sheet silicate material, an aluminum source, a template agent and an alkali in water in accordance with that the mole ratio of SiO2 in the sheet silicate material to Al2O3 in the aluminum source to M2O in an alkali source to the template agent to H2O is 1: (0-0.05): (0.05-0.25): (0.01-0.5): (10-100) so as to obtain initial sol, then, crystallizing the initial sol for 20-120 hours in a closed system at the temperature of 130-200 DEG C so as to obtain a product, and subjecting the product to washing, drying and roasting according to conventional methods, the technical problem is better solved, and the rare-earth containing MFI zeolite can be applied to water vapor accompanied high-temperature catalytic reaction.

The invention discloses a bifunctional glass and a preparation method thereof. The preparation method includes: firstly, in terms of molar percentage, placing 10-18% of Ga2O3, 15-28% of SiC, 14-25% of B2O3, 1-3% of GeO2, 5-40% of Eu2O3, 5-30% of Tb2O3, and 0.1-2% of CeO2 into a ball mill to conduct ball-milling till being able to pass a 200-mesh stand sieve, thus forming a batch; and then subjecting the batch to high temperature melting in air atmosphere into molten glass, finally pouring the molten glass in a graphite mold to undergo forming, and then carrying out precise annealing to obtain the bifunctional glass. The bifunctional glass prepared according to the invention has high light transmittance, strong magnetism, high luminescent intensity, high brightness, pure chroma, high quenching concentration and temperature, excellent glass forming properties, excellent thermal stability and chemical stability. And the preparation process is easy to operate, thus being suitable for industrialized production.

The invention belongs to the field of permanent magnet materials, and particularly relates to an R(Fe,M)12 type rare earth permanent magnet material and a preparation method thereof. According to theinvention, a Cu-rich grain boundary phase of a magnet is designed through a magnetic powder surface chemical Cu plating process, a hot-pressed magnet is prepared, the coercive force of the magnet is improved, and preparation of the novel R(Fe,M)12 hot-pressed block permanent magnet is achieved; through Cu plating treatment on the surface of the magnetic powder, the Cu-rich grain boundary phase perfectly coating grains can be formed in the hot-pressed magnet, so that the purpose of magnetic isolation between R(Fe,M)12 hard magnetic phase grains can be effectively achieved, reverse magnetizationdomain extension is inhibited, and the permanent magnet characteristic of the magnet is improved; and the grain boundary Cu-rich phase can also greatly improve the electrochemical potential of the grain boundary corrosion channel of the magnet, effectively improve the intrinsic corrosion resistance of the magnet and prolong the actual service life of the magnet.

The invention relates to a synthetic method for a light-emitting polyacrylic material containing an acrylate functional group polyhedronal oligomeric silsesquioxane rare earth complex. The synthetic method comprises: firstly performing coordination on acrylate functional group polyhedronal oligomeric silsesquioxane and a rare earth compound by virtue of coordination chemistry principles; then dispersing the acrylate functional group polyhedronal oligomeric silsesquioxane rare earth complex in an acrylic monomer for in-situ mass polymerization; and finally obtaining the light-emitting polyacrylic material containing the acrylate functional group polyhedronal oligomeric silsesquioxane rare earth complex, wherein the material has good light transmittance, heat stability and a fluorescence property. The synthetic method provided by the invention is simple in synthetic steps, mild in condition, free of any additives and easy to control conditions, and the whole synthetic equipment is easy to construct and is of great innovation, so that industrial production of the light-emitting polyacrylic materials is facilitated.

The invention relates to a preparation method for a magnesium-titanium alloy plate with high rare earth content. The magnesium-titanium alloy plate with high rare earth content is prepared from magnesium, zinc, titanium, a magnesium-yttrium intermediate alloy and a magnesium-gadolinium intermediate alloy through melting in a vacuum melting furnace, casting molding, homogenization treatment, rolling forming and aging treatment, and has tensile strength of up to 477 MPa and elongation percentage of 6.4%. The preparation method is advanced in technology and accurate and detailed in data, and is an advanced preparation method for the magnesium-titanium alloy plate with high rare earth content.