10 results about "Lanthanum" patented technology

The composition of nano-grade lanthanum titanium compound oxide is La2-4Ti2-9O7-24, in which La:Ti:O (atom ratio)=2-4:2-9:7-24, LawTi2O7 and La4Ti9O24 are existed in micro-crystal state, its average grain size is 28nm-35nm, and its specific surface area is greater than 60 sq.m/g. Said compound oxide can be used as catalyst for preparing lactide by utilizing lactic acid dehydration and polycondensation, can improve viscosity of reaction system and can effectively reduce lactic acid oligomer cracking temp., and the yield of lactide is 80%-90%.

The invention discloses a modified lithium-rich manganese-based cathode material for a lithium ion battery. The structural general formula of the material is (La<1-x>Sr<x>)MnO<3-delta>, wherein x is equal to or greater than 0 and less than or equal to 0.3, a is equal to or greater than 0.8 and less than or equal to 1, and delta is equal to or greater than 0 and less than or equal to 0.75; the modified lithium-rich manganese-based cathode material is prepared through the method 1 or method 2 as follows: method 1: lanthanum salt, strontium salt and manganese salt are mixed according to the stoichiometric proportion to prepare a (La<1-x>Sr<x>)MnO<3-delta> precursor solution, then a complexing agent is added into the solution and stirred uniformly, the lithium-rich manganese-based cathode material is added into the solution, heating is performed to evaporate the solution to form gel, and finally the dried gel is calcined, so that the modified cathode material is obtained; method 2: a precursor solution is prepared according to the method 1, a complexing agent is added into the solution and stirred uniformly, then the mixed solution is heated until the solution is burnt into powder, the powder is pre-burnt and is mechanically mixed with the lithium-rich manganese-based cathode material, and the mixture is calcined, so that the modified cathode material is obtained.

A process for preparing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of ammonia and primary and secondary amines, in the presence of a supported copper-, nickel- and cobalt-containing catalyst, wherein the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises oxygen compounds of aluminum, of copper, of nickel, of cobalt and of tin, and in the range from 0.2 to 5.0% by weight of oxygen compounds of yttrium, of lanthanum, of cerium and/or of hafnium, each calculated as Y₂O₃, La₂O₃, Ce₂O₃ and Hf₂O₃ respectively, and catalysts as defined above.

The invention provides a light control-based organic spin memory cell. A structure of the memory cell comprises the following components from bottom to up in order: a bottom electrode, a ferromagnetic metal layer 1, an organic nonferromagnetic layer, a ferromagnetic metal layer 2, and a top electrode; the bottom electrode comprises one or more of gold, platinum, copper or other nonferromagnetic metal materials; the ferromagnetic metal layer 1 comprises one or more of iron, cobalt, nickel, cobalt-iron-boron, nickel-iron, lanthanum strontium manganese oxide, Heusler alloy or other ferromagnetic materials; the nonferromagnetic layer organic material comprises aluminum tris-(8-hydroxyquinoline) (Alq3), alpha-sexithiophene (6T) or other photosensitive organic materials; the ferromagnetic metal layer 2 comprises one or more of cobalt, cobalt-iron, cobalt-iron-boron, Heusler alloy or other ferromagnetic materials; the top electrode comprises one or more of gold, platinum, copper or other nonferromagnetic metal materials.

The invention discloses a phosphorus adsorbent based on water supply plant iron-aluminum mud and a preparation method of the phosphorus adsorbent, and belongs to the field of remediation of water environment. The preparation method comprises the following steps: (1) putting lanthanum salt into water, and regulating pH (Potential of Hydrogen), thus obtaining an alkalescent lanthanum suspension solution; (2) fully mixing dry water supply plant iron-aluminum mud with the alkalescent lanthanum suspension solution, thus obtaining a mixed solution; (3) firstly culturing the mixed solution at 60 to 80 DEG C for 5 to 8 hours, and then culturing at 20 to 30 DEG C for 24 to 36 hours; (4) directly drying a solution cultured in step (3), thus obtaining a solid material, i.e., the phosphorus adsorbent.The phosphorus adsorbent disclosed by the invention simultaneously has the adsorption characteristics of fast adsorption and slow balanced adsorption; the preparation method is a method developed under a situation that whether exogenous input can disturb a remediation effect or not cannot be ensured during an environment remediation process, and the preparation method is beneficial for realizingfast remediation and long-acting maintenance of the water environment; water eutrophic remediation can be facilitated, and implementation of controlling waste by waste is promoted.

The invention discloses aluminum-lanthanum-boron-strontium intermediate alloy for cast aluminum-silicon alloy and a preparation method of the aluminum-lanthanum-boron-strontium intermediate alloy. According to the preparation method, with Al-3B intermediate alloy, Al-10La intermediate alloy and Al-10Sr intermediate alloy as raw materials, the Al-10La intermediate alloy is added firstly to react with the Al-3B intermediate alloy at high temperature to produce a lanthanum-boron compound, and then the Al-10Sr intermediate alloy is added at lower temperature to enable strontium not to react with boron or the lanthanum-boron compound basically, thus the prepared aluminum-lanthanum-boron-strontium intermediate alloy is ensured to mainly contain the lanthanum-boron compound and an aluminum-strontium binary phase. The intermediate alloy can be applied to structure improvement of binary aluminum-silicon alloy and is more suitable for optimizing the structure of cast aluminum alloy with complex components. With adoption of the intermediate alloy, primary aluminum dendrites in a solidification structure is changed from developed dendrites to fine equiaxed grains without generating the harmful phenomena of fading of refinement, metamorphic degradation and the like, so that metamorphose can be effectively carried out on eutectic silicon to enable the eutectic silicon to be changed from a lamellar shape to a short rod shape and even a granular shape, thus the comprehensive mechanical property of the cast aluminum-silicon alloy and the castability of the cast aluminum-silicon alloy are improved.

The invention provides a recyclable sediment covering device and application thereof. According to the recyclable sediment covering device, the outer layer structure of the covering device covers an inner layer structure; the inner layer structure is composed of a magnet active material and is fed to the position above a sediment-water interface, and after adsorption of pollutants reaches saturation, the inner layer structure is removed from the water body under the action of an external magnetic field; the magnet active material in the single-core sediment covering device is selected from a magnetic iron-based material, a magnetic zirconium-based material, a magnetic magnesium iron-based material and a magnetic lanthanum-based material; the inner layer structure in the dual-core sedimentcovering device comprises an inner core and an outer core, the inner core is made of ferroferric oxide, and the outer core is made of an iron-based material, a zirconium-based material, a magnesium iron-based material and a lanthanum-based material; and the outer layer structure is made of a porous fabric material. The covering device can prevent a covering magnetic material from being washed awayby water flow, and can prevent sediment from being mixed with the covering magnetic material, so that the sediment restoration cost is greatly saved, and the recovery of pollutants in sediment is realized to the maximum extent.

The invention relates to a filter material used for sewage treatment and particularly relates to a high-efficient composite filter material prepared by blending melt-blown polypropylene with modified pseudo-boehmite and used for sewage treatment and a preparation method thereof. The filter material is prepared from following raw materials, by weight: 1-2 parts of manganese sand in 200-300 meshes, 15-18 parts of micro powder of pseudo-boehmite in 200-300 meshes, 30-35 parts of polypropylene, 1-2 parts of a titanate coupling agent, 0.4-0.5 parts of sodium lignin sulfonate, 1-2 parts of polyether-modified silicone oil, 8-10 parts of nano bamboo charcoal powder, 1-2 parts of yttrium sol being 8-10% in solid content, 0.01-0.02 parts of lanthanum-series rare earth salt and 30-40 parts of water. In the invention, the modified pseudo-boehmite-based composite micro powder is supported onto the modified polypropylene master batch melt-blown filaments to prepare the filter material having a stereoscopic network structure. The filter material is excellent in purification effect, is stable and high-efficient in performances, is changeable in shape, is not liable to damage and can be used repeatedly.