538 results about "Nickel compounds" patented technology

A layered lithium-nickel-based compound oxide powder for a positive electrode material for a high density lithium secondary cell, capable of providing a lithium secondary cell having a high capacity and excellent in the rate characteristics also, is provided. A layered lithium-nickel-based compound oxide powder for a positive electrode material for a lithium secondary cell, characterized in that the bulk density is at least 2.0 g/cc, the average primary particle size B is from 0.1 to 1 μm, the median diameter A of the secondary particles is from 9 to 20 μm, and the ratio A/B of the median diameter A of the secondary particles to the average primary particle size B, is within a range of from 10 to 200. In production of a layered lithium-nickel-based compound oxide powder, which comprises spray drying a slurry having a nickel compound and a transition metal element compound capable of substituting lithium other than nickel, dispersed in a liquid medium, followed by mixing with a lithium compound, and firing the mixture, the spray drying is carried out under conditions of 0.4≦G/S≦4 and G/S≦0.0012 V, when the slurry viscosity at the time of the spray drying is represented by V (cp), the slurry supply amount is represented by S (g/min) and the gas supply amount is represented by G (L/min).

The invention provides an active carbon desulfurization catalyst and a preparation method thereof. The catalyst consists of carrier activated carbon and an active ingredient metal oxide mixture, wherein the metal oxide mixture is the mixture of copper oxide, iron oxide, aluminum oxide, nickel oxide, manganese oxide, cobalt oxide and zinc oxide. The preparation method comprises the following steps of: mixing a copper-containing compound, an iron-containing compound, an aluminum-containing compound, a nickel-containing compound, a manganese-containing compound, a cobalt-containing compound and a zinc-containing compound; dissolving the mixture; dispersing the active carbon into the mixed solution; and filtering, washing, drying and calcining the mixture. The preparation method is simple and the obtained catalyst has high desulfurization efficiency.

The invention relates to a preparation method of a high-capacity layered lithium-rich manganese-based oxide, and the method is characterized by comprising the following steps: a) fully mixing a nickel-containing compound, a manganese-containing compound I and a cobalt-containing compound with a solvent so as to get a solution or suspension; b) adding a precipitator into the solution or suspension obtained in the step a), and filtering to obtain a precipitate; c) drying the precipitate obtained in the step b) so as to get a precursor; d) uniformly mixing the precursor obtained in the step c), a manganese-containing compound II, a doping element M-containing compound and a lithium-containing compound in proportion so as to get mixed powder; and e) performing heat treatment on the mixed powder obtained in the step d) so as to get an ultrahigh-capacity manganese series lithium transition metal compound oxide with an expression of Li(Li0.2Mn0.8-delta-alpha-beta-Ni alpha Co beta M delta)O2. Compared with the prior art, the preparation method provided by the invention has the advantages of high utilization rate of raw materials and low production cost, and the prepared lithium-rich manganese-based oxide has the advantages of excellent charge-discharge performance and excellent cycle performance.

The preservation performance of a nonaqueous electrolyte secondary cell charged to high potential is improved while the initial capacity and the cycle property of the cell are also improved. The nonaqueous electrolyte secondary cell includes: a positive electrode having lithium phosphate and a positive electrode active material containing lithium cobalt compound oxide and lithium manganese nickel compound oxide having a layer structure, the lithium cobalt compound oxide having at least zirconium and magnesium added in LiCoO₂; a negative electrode having a negative electrode active material; and a nonaqueous electrolyte having a nonaqueous solvent and an electrolytic salt. The potential of the positive electrode is more than 4.3 V and 5.1 V or less based on lithium. The nonaqueous electrolyte contains vinylene carbonate as the nonaqueous solvent and, as the electrolytic salt, at least one of lithium bis(pentafluoroethane sulfonyl)imide and lithium bis(trifluoromethane sulfonyl)imide at 0.1 M or more and 0.5 M or less. The nonaqueous electrolyte contains 1,3-dioxane.

The invention discloses a magnesium alloy with zinc and nickel compound plating layers and a preparation method thereof. A zinc plating layer of the magnesium alloy is taken as a bottom layer with the width between 20 microns and 25 microns, a nickel plating layer is taken as a surface layer, and the total width of the zinc plating layer and the nickel plating layer is less than or equal to 40 microns. The method comprises the following steps: firstly, plating preliminary treatment, i.e. zinc is activated in an acid solution and then soaked in sulphate; secondly, zinc electrodeposition, i.e. after the zinc is soaked in the sulphate in the first step, the zinc layer of the magnesium alloy is electrodeposited; thirdly, nickel bright plating, i.e. the magnesium alloy which is nicely processed in the second step is brightly plated with nickel in a nickel plating solution; fourthly, sodium silicate water solution sealing. With the method, the obtained zinc plating layer is nicely combined with a base body, has uniform width and high corrosion resistance, can be taken as a protective plating layer to be singly used and can be also taken as a transition layer to carry out plating or chemical plating or other protective or decorative platings, and the nickel plating layer obtained from the zinc plating layer by plating is nicely combined with the zinc plating layer and is uniform, exquisite, bright and beautiful.

The invention relates to a preparation method of a positive pole material (spinel type lithium nickel manganese oxide) of a high-voltage lithium ion battery, which comprises the following steps: simultaneously dissolving a lithium-containing compound, a manganese-containing compound and a nickel-containing compound instead of adding a lithium source afterwards, and ensuring that the lithium compound, the nickel compound and the manganese compound are evenly mixed; and adding precipitant to generate manganese-containing precipitate, wherein the generated manganese-containing precipitate provides crystal nuclei for further precipitation in the hydrothermal process, particles having different sizes can be obtained by controlling hydrothermal conditions, the particle sizes of the products can be increased by decreasing the concentrations of the metal salts, increasing the hydrothermal temperature and prolonging the hydrothermal time, and materials having different shapes can be obtained or porous materials can be prepared by adding different additives. The method omits the steps of filtration and water washing; and the synthesis process is economic and environment-friendly. The lithium nickel manganese oxide material prepared by the invention is in a spinel structure, and is high in crystallinity and excellent in electrochemical performance; and the specific capacity can be up to 130-142mAh/g, 120-135mAh/g and 105-120mAh/g in case of 1C, 2C and 5C rate discharge.

The invention discloses a dentiform sphere shaped heavy oil hydrotreated catalyst and a preparation method thereof. The catalyst comprises an active composition, an addition agent and a dentiform sphere shaped aluminum oxide carrier, wherein the active composition comprises compounds of cobalt and nickel, and a compound of molybdenum or/and tungsten; the addition agent comprises a compound of phosphor, silicon, boron or halogen or compounds of any two compositions of the phosphor, the silicon, the boron and the halogen; and compositions according to gross weight of the dentiform sphere shaped heavy oil hydrotreated catalyst comprise: 2 to 6 percent of the cobalt compound, 3 to 10 percent of the nickel compound, 0 to 26 percent of the molybdenum compound, 0 to 8 percent of the tungsten compound, and 0.5 to 2 percent of the addition agent. The catalyst has the characteristics of high specific surface area, large pore volume, high strength, proper surface acid content, small bed pressure drop, low reaction temperature and high activity of hydrodesulfurization and denitrification. The preparation method comprises preparation of a precursor substance of the aluminum oxide carrier, preparation of the dentiform sphere shaped aluminum oxide carrier, preparation of a catalyst steeping fluid and preparation of the catalyst. The preparation process can be mastered and realized simply and easily.

The present invention is one kind of hydroprocessing catalyst and its preparation process. The catalyst contains alkali assistant and active components including Ni and Mo and/or W, with the atom number of Ni accounting for 0.3-0.9 of the total atom number of Ni and Mo and/or W; and the pore volume of 2-6 nm pores accounts for 70-90 % of total pore volume. The catalyst is prepared through mixing different pore structures of alumina to form carrier, soaking the alumina carrier first with alkali assistant aqua and then Mo and/or W compounds aqua and Ni compound aqua. Compared with available technology, the catalyst of the present invention has high Ni content in active components, more middle and small sized holes, high hydrogenation mercaptol-eliminating and olefin-saturating activity, and is especially suitable for mercaptol-eliminating process after hydrogenation.

Provided is a lithium composite oxide having a uniform and suitable particle size and high specific surface area due to a hollow structure that can be produced on an industrial scale. A nickel composite hydroxide as a raw material thereof is obtained controlling the particle size distribution of the nickel composite hydroxide, the nickel composite hydroxide having a structure comprising a center section that comprises minute primary particles, and an outer-shell section that exists on the outside of the center section and comprises plate shaped primary particles that are larger than the primary particles of the center section, by a nucleation process and a particle growth process that are separated by controlling the pH during crystallization, and by controlling the reaction atmosphere in each process and the manganese content in a metal compound that is supplied in each process.

An aqueous surface-treatment liquid is a treatment liquid containing a water-soluble zirconium compound, water-dispersive particulate silica, a silane coupling agent, a vanadic acid compound, a phosphoric acid compound, a nickel compound, and an acrylic resin emulsion in particular proportions. A surface-treated galvanized steel sheet produced using the treatment liquid is a galvanized steel sheet having a surface-treatment coating on a surface thereof, and the coating contains a zirconium compound, particulate silica, a silane-coupling-agent-derived component, a vanadic acid compound, a phosphoric acid compound, a nickel compound, and an acrylic resin in particular proportions. The amount of coating on a zirconium basis is 10 to 200 mg/m². This surface-treated galvanized steel sheet is chromate-free and has superior flat-portion corrosion resistance, blackening resistance, and appearance and corrosion resistance after press forming.

The invention discloses ceramic silicon rubber and a preparation method thereof and relates to rubber and a preparation method thereof. The ceramic silicon rubber is prepared from, in parts by weight, 100 parts of silicon rubber, 10-60 parts of fumed silica, 0-10 parts of hydroxyl silicone oil, 0.00001-10 parts of metal nickel or a nickel compound calculated based on nickel, 0-10 parts of a coupling agent, 10-180 parts of zinc borate type porcelainized powder, 10-60 parts of a hydroxide flame-retardant and 0.01-5 parts of a vulcanizing agent. The materials are mixed in a kneading machine, vacuumized, then added to the kneading machine and uniformly mixed, bulk ceramic rubber is formed, cooled and mixed with the vulcanizing agent for open milling, and the flame-retardant ceramic silicon rubber is obtained. According to the ceramic silicon rubber, due to the fact that the nickel compound is added to the flame-retardant ceramic silicon rubber, the sintering temperature of the flame-retardant ceramic silicon rubber is reduced, the preparation reaction speed is increased, the production efficiency is improved, and the production cost is reduced.

The invention discloses a copper electrolyte purifying technology which comprises the following steps: adding a crystallizing agent into copper electrolyte or pre-decoppering post-liquid or adding a crystallizing agent into copper electrolyte after adsorption impurity removal treatment or pre-decoppering post-liquid; crystallizing to obtain copper-nickel compound salt; and separating and recycling copper and nickel from the obtained copper-nickel compound salt to realize purification of the copper electrolyte, wherein in the adsorption impurity removal treatment, an oxide of antimony and/or bismuth and the hydrate thereof are adopted as adsorbents to selectively adsorb the impurities As, Sb and Bi in the copper electrolyte, and the generation of black copper sludge, black copper plates and AsH3 gas can be thoroughly eliminated in a copper electrolyte purifying process. The technology disclosed by the invention has the advantages of simple process, simplicity and convenience in operation, low cost, high efficiency, good operation environment and the like, and is suitable for the industrial production of copper electrolyte purification.

Disclosed is a process for production of a carboxylic acid ester from a carboxylic acid and an olefin or production of an ether compound from an alcohol and an olefin at low cost and with high yield in an industrially advantageous manner. The process comprises the step of reacting a carboxylic acid with an olefin to yield a corresponding carboxylic acid ester or reacting an alcohol with an olefin to yield a corresponding ether compound. In the process, a catalyst comprising a combination of (i) at least one metal compound selected from an iron compound, a cobalt compound and a nickel compound and (ii) an acidic compound is used.

The invention belongs to the fields of new chemical process techniques and new energy development, in particular to a methanation catalyst, a preparation process thereof and a methanation reaction device for the catalyst. The methanation catalyst comprises the following components in percentage by mass: 10-60 percent of nickel compound serving as an active component, 0-5 percent of auxiliary agent and the balance of carrier. The preparation process for the methanation catalyst comprises the steps of dissolving, mixing, dipping, precipitating, filtering, drying, forming and the like. The methanation reaction device comprises at least two units of reducing separate heat pipe phase change heat removing combined devices, wherein each reducing separate heat pipe phase change heat removing combined device comprises a reactor, reducing pipes at the two ends of the reactor, more than one heat absorbing section in the reactor and a condensate steam package which is connected with the heat absorbing section.

The invention relates to a method for preparing a LiCoxNiyMnzO2 anode material for a lithium ion battery, belonging to the preparation technical filed of the anode material of the lithium ion battery. The method comprises the following steps that manganese compound, nickel compound, LiCoO2 and lithium hydroxide are taken as raw materials; a well precursor combined by lithium, manganese, cobalt and nickel is obtained through hydrothermal reaction; then, a lithium source is added in the precursor to obtain a precursor through grinding; and finally, LiCoxNiyMnzO2 with excellent properties is obtained after the precursor is baked once. The method has the advantages of simple and easily controlled technological process, low production cost of prepared product and stable and controllable product performance, and can be used in industrial production.

The invention provides a micron nickel phosphide electro-catalytic material used for hydrogen evolution/oxygen evolution double functions and belongs to the technical field of novel materials. A nickel compound is used as a precursor and a high-boiling-point organic matter is used as a solvent; the material has the characteristics of controlling the synthesis of micron nickel phosphide materials on a microcosmic level and the like; preparation conditions are rapid and moderate; a generated compound of Ni2P and Ni5P4 is of micron-grade nickel phosphide particles and the grain diameter is 5-10 microns; the prepared material can be used for electro-catalytic hydrogen evolution and oxygen evolution double functions and has a good electro-catalytic property; and the material has important meanings on industrial production of the micron-scale nickel phosphide material and application and development of the material, and has a relatively wide application range.

A layered lithium-nickel-based compound oxide powder for a positive electrode material for a high density lithium secondary cell, capable of providing a lithium secondary cell having a high capacity and excellent in the rate characteristics also, is provided. A layered lithium-nickel-based compound oxide powder for a positive electrode material for a lithium secondary cell, characterized in that the bulk density is at least 2.0 g/cc, the average primary particle size B is from 0.1 to 1 mum, the median diameter A of the secondary particles is from 9 to 20 mum, and the ratio A/B of the median diameter A of the secondary particles to the average primary particle size B, is within a range of from 10 to 200. In production of a layered lithium-nickel-based compound oxide powder, which comprises spray drying a slurry having a nickel compound and a transition metal element compound capable of substituting lithium other than nickel, dispersed in a liquid medium, followed by mixing with a lithium compound, and firing the mixture, the spray drying is carried out under conditions of 0.4<=G/S<=4 and G/S<=0.0012 V, when the slurry viscosity at the time of the spray drying is represented by V (cp), the slurry supply amount is represented by S (g/min) and the gas supply amount is represented by G (L/min).

A color conversion composition converting incident light to light having a longer wavelength than the incident light, and containing the following components (A)-(C): (A) at least one luminescent material; (B) a binder resin; and (C) at least one of tertiary amines, catechol derivatives and nickel compounds, in which the tertiary amines, the catechol derivatives and the nickel compounds have a molar extinction coefficient ε of 100 or less over the whole wavelength range from 400 nm to 800 nm is provided. This color conversion composition achieves a good balance between improvement of color reproducibility and durability if used for a liquid crystal display or an LED lighting device.

The invention relates to a photocatalysis air purifying device. The device comprises a frame (1) and an ultraviolet lamp tube (2) installed in the frame (1), wherein the frame (1) is provided with an airflow passageway with a cross-ventilation function. The device is characterized in that the frame (1) is internally provided with a titanium-nickel compounded photocatalysis net (3); the titanium-nickel compounded photocatalysis net (3) comprises a photocatalysis titanium net (30) and a photocatalysis nickel net (31); the titanium-nickel compounded photocatalysis net (3) is a compounded photocatalysis antibiosis foam metal net of a three-dimensional space structure and comprises a foam nickel substrate and TiO2 loaded on the surface of the foam nickel substrate; the air inlet of the airflow passageway of the frame (1) is provided with a dust filtering net (4); the outlet of the airflow passageway of the frame (1) is provided with strip bars (7) or a porous baffle; and a fan (6) is arranged in the frame (1) or at the rear part of the frame (1). By using the photocatalysis air purifying device of such structure, the effects of volatile organic compound (VOC) degradation, disinfection and sterilization are obvious.

The invention discloses a foamed nickel self-supported flake-shaped Ni3P/C composite material for a sodium ion battery negative electrode and a preparation method for the composite material. According to the composite material, the flake-shaped Ni3P is uniformly growing on the foamed nickel; and the Ni3P is uniformly coated with a C film. The preparation method for the composite material comprises the steps of taking a nickel compound as the raw material, and uniformly growing a flake-shaped nickel hydroxide layer on the surface of the nickel compound through a hydrothermal method; then taking sodium hypophosphite as a phosphorus source, and performing thermal insulation at a temperature of 300 DEG C for 2h to prepare the foamed nickel self-supported flake-shaped Ni3P material; and finally, performing carbon coating on the foamed nickel self-supported flake-shaped Ni3P material to obtain the foamed nickel self-supported flake-shaped Ni3P/C composite material. The sodium ion battery prepared from the Ni3P/C composite material prepared by the invention has excellent specific capacity, rate capability and stable cycling performance; and in addition, the preparation method is simple and feasible, wide in raw material resources and suitable for industrial production.

The invention provides a method for preparing a lithium-enriched solid solution cathode material by doping iron, copper and tin ions, which is characterized in that a preparation process is formed by the following steps of: mixing a nickel compound, a manganese compound, a cobalt compound and an M compound, which are weighed to form a mixture 1; adding a wet milling medium and organic weak acid; carrying out wet milling and mixing and adding a lithium compound; after carrying out the wet milling and the mixing, utilizing a vacuum drying or spraying drying method to treat a precursor 1 to prepare a dry precursor 2; putting the precursor 2 into air, oxygen-enriched gas or pure oxygen atmosphere; and utilizing a two-section sintering method or a two-time subsection sintering method to prepare the lithium-enriched solid solution cathode material of xLi2MnO3*(1-x)Li[NiyMnzCokMq]O2. An electrode material prepared by the method disclosed by the invention is uniformly formed and has a very good discharging performance; and particularly, the electrode material has the excellent circulating discharging performance under a large-current condition.