583 results about "Cobalt compounds" patented technology

Formation of a silicide layer on the source/drain regions of a field effect transistor with a channel under tensile strain is disclosed. The strain is originated by the silicon/carbon source/drain regions which are grown by CVD deposition. In order to form the silicide layer, a silicon cap layer is deposited in situ by CVD. The silicon cap layer is then employed to form a silicide layer made of a silicon/cobalt compound. This method allows the formation of a silicide cobalt layer in silicon/carbon source/drain regions, which was until the present time not possible.

The invention relates to a high-density lithium cobalt oxide power material with a super-large grain diameter. The method comprises the steps of mixing a cobalt compound, a lithium compound or meanwhile a small amount of doping element compounds; sintering for 3 to 30 hours at the high temperature of 950 to 1,100 DEG C to form a block sintered product; crushing and grading the product to obtain the lithium cobalt oxide power material (molecular formula is LiaCo1-bMbO2), wherein, when b is not equal to 0, the middle diameter of the lithium cobalt oxide containing the doping elements is larger than or equal to 15 Mum, and the tap density is higher than or equal to 2.5g/cm<3>; when b is equal to 0, the middle diameter of the lithium cobalt oxide without the doping elements is larger than 20 Mum, and the tap density is higher than or equal to 2.6g/cm<3>. the 3.6V platform capacity rate of the material as the anode active substance for a lithium battery is higher than or equal to 75%; in the thermal impact test in a 150 DEG C thermotank, the lithium battery with the material is free from leakage and does not catch fire or explode for 60 minutes; the 1C5A specific capacity of the material in the battery is larger than or equal to 135mAh/g.

The invention relates to melamine-based sponge for absorbing oil slick and a preparation method thereof. The preparation method includes the following steps of pretreatment: putting melamine-based sponge in absolute ethyl alcohol and deionized water for ultrasonic cleaning prior to drying; roughening: putting the pretreated melamine-based sponge in cobalt compound water solution, adding oxidant solution into cobalt compound water solution with stirring at room temperature, and after reaction, taking out and drying the melamine-based sponge; hydrophobic modification: soaking the roughened melamine-based sponge into hydrophobic modified reagent with stirring; after soaking, taking out the soaked melamine-based sponge prior to drying to obtain the melamine-based sponge for absorbing oil slick. The melamine-based sponge for absorbing oil slick is simple preparation method, mild in reaction condition, easily available in raw material, low in cost, high in oil absorption rate and good in reusability.

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.

A process for preparing aliphatic alcohols that includes cobalt-catalyzed hydroformylation of olefins, treatment of a hydroformylation mixture with oxygen-containing gases in the presence of acidic, aqueous cobalt(II) salt solutions, separation of a mixture into an aqueous phase comprising cobalt salts and an organic phase comprising the aliphatic aldehydes, and hydrogenation of an aldehyde-containing organic phase wherein the organic phase and treatment with an adsorbent to separate off cobalt compounds prior to hydrogenation.

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 invention relates to a hydrogenation catalyst with gradient-decreasing-distributed active metal constituent concentration and a preparation method thereof. The preparation method comprises the following steps: by using Al2O3 or Al2O3 containing SiO2, TiO2 and ZrO2 as the carrier, mixing molybdenum and/or tungsten compounds and/or nickel and/or cobalt compounds with deionized water or ammonia water to obtain a metal dipping solution; preparing a thicker metal dipping solution dipping carrier, and gradually adding deionized water or ammonia water to dilute the metal dipping solution saturated spray carrier, or preparing metal dipping solutions with at least two different concentrations; and drying at 80-150 DEG C for 1-8 hours, and roasting in the air at 300-650 DEG C for 2-6 hours. The catalyst contains 1.0-10.0 wt% of molybdenum and/or tungsten oxides and/or 0.2-5.0 wt% of cobalt and/or nickel oxides. The hydrogenation catalyst has favorable activities of demetallization, carbon residue removal, devulcanization and denitrification, has the advantages of high stability, simple preparation and low cost, and is used for hydrogenating heavy-weight oil.

The invention specifically relates to a regenerable heterogeneous Fenton catalyst, and a preparation method and application thereof, which belongs to the technical field of industrial catalysts. The catalyst provided by the invention uses commercial zeolite as a carrier and is prepared through the following steps: surface modification of the carrier with a high polymer; loading of an active component Fe or Co; and roasting so as to form an iron or cobalt compound-valence oxide on the surface of zeolite. The catalyst shows high-efficiency degradability to industrial intractable organic waste water containing phenols, dyes or the like, and the degradation rate of organic matters in waste water is up to more than 90% at room temperature (less than 30 DEG C) under an almost neutral condition (wherein a pH value is in a range of 6 to 8); and the catalyst has good regeneration performance. According to the method, the heterogeneous Fenton catalyst is used for oxidation removal of organic matters like phenols and dyes in waste water, so cost is low and no secondary pollution is produced; and a process for treating waste water with the Fenton catalyst is a promising organic waste water treatment process.

The nickel hydroxide particles for a nickel hydroxide electrode may be treated using an alkaline solution of a strong oxidizing agent such as sodium or potassium persulfate to modify the surface nickel hydroxide structure. The resulting modified surface structure has been found to impart various benefits to electrodes formed from the nickel hydroxide. It is believed that the oxidation of cobalt compounds at the surface of the nickel hydroxide particles results in a highly conductive cobalt compound that plays an important role in the high reliability, high stability and high capacity utilization of nickel electrodes as described herein.

A plastic lens which absorbs ultraviolet light having wavelength of about 400 nm and suppresses coloring and a process for producing the lens. A plastic lens may be made from a composition which comprises (A) a lens material monomer comprising diethylene glycol bisallylcarbonate, (B) an organic peroxide-based polymerization initiator, (C) a cobalt compound represented by at least one of CoO.Al₂O₃ and Co.Al₂O₄, and (D) at least one ultraviolet light absorbent selected from 2-hydroxy-4-octyloxy-benzophenone, 2,2′,4,4′-tetrahydroxy-4-octyloxybenzophenone and 2,2′,4′-trihydroxy-4-octyloxybenzophenone. A process for producing a plastic lens comprises mixing component (A), component (B), a cobalt fluid comprising component (C) in a dispersant and component (D) and a step of casting the mixed fluid into a mold and polymerizing the fluid to obtain a plastic lens.

The invention relates to a wet preparation method of battery-level spherical cobaltosic oxide, which comprises the specific steps of: preparing cobalt salt into a first mixed solution with the concentration of 1-3mol/L; preparing a hydrate solution with the concentration of 2-10mol/L into a second mixed solution; preparing a complexing agent A with the concentration of 0.001-200g/L into a third mixed solution; introducing the three mixed solutions into a reaction vessel by adopting a parallel flow method; stirring the mixed solution intensively to cause the three solutions to react; adding a certain amount of oxidizer continually into a reaction system during the reaction process; aging the mixed solution for 2-48 hours under normal temperature; centrifugalizing, washing and drying the material; and calcining the mixture of a pretreated precursor and lithium salt under 750-1000 DEG C to obtain the lithium battery cathode material. The method has the advantage that the cobaltosic oxide powder can be directly obtained from the oxidation of a cobalt compound in the solution owing to the fact that the cobalt compound can be oxidized in the solution under alkaline condition. The material is a relatively ideal battery cathode material for mobile telephones, video cameras, laptops and portable electric appliances.

The invention discloses a preparation method of a nano-structure WC-Co composite powder, and belongs to the field of an alloy preparation method. The method comprises the following steps in sequence: adding a carbonic powder material which is excessive to tungsten, vanadium and chromium carbides into water-soluble saturated mixed aqueous solution of tungsten-containing compound, cobalt-containing compound, chromium-containing compound and vanadium-containing compound to adsorb the saturated composite salt solution; dehydrating and drying to form a nano-scale composite salt thin layer on the surface of the carbonic powder material; removing crystal water out of the composite salt at the temperature below 500 DEG C under a condition of isolating air, and decomposing the composite salt into composite oxide of tungsten oxide, chromium hemitrioxide, vanadium oxide and cobalt oxide, further heating, and reducing and carbonizing the composite oxide on the surface of the carbonic powder material to generate the WC-Co nano-structure composite powder at the temperature below 850 DEG C. The preparation is a simpler and more reliable novel preparation method of the nano WC-Co composite powder by a direct carbonization method.

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 provides layered perovskite structural ceramic and a preparation method thereof. The preparation method includes mixing well titanate compounds, bismuth compounds, strontium compounds, iron compounds, cobalt compounds and complexing agent in solvent, heating, drying and combusting to obtain powder, and presintering to obtain powder; performing the powder, and performing hot-pressing sintering to obtain the structural ceramic in in a formula (I). Compared with ceramics prepared in the prior art by solid phase sintering process, the structural ceramic in the formula (I) is prepared by solution process and hot pressing sintering. The preparation method has the advantages that less volatile low-valence strontium ions are introduced, increased leakage current due to volatilization of the strontium ions is improved, and ferroelectric properties are improved; the raw materials are evenly spread by the solution process, the power is even in component and has high reactivity, and Fe-Co ions are coupled fully; and the materials processed by hot pressing sintering are high in density and orientation, and the layered perovskite structural material can be obtained, namely Bi(n+1-x)SrxF3(n-3)/2Co(n-3)/2Ti3O3(n+1) (I).

Supports for Fischer-Tropsch catalysts are formed by forming a particulate material from titania, alumina and optionally silica. A cobalt compound is incorporated into the particulate material which then is calcined to convert at least part of the alumina to cobalt aluminate.

The invention relates to a 1,2,4-triazole and 5-sulfonyl m-phthalic acid mixed ligand cobalt (II) coordination compound magnetic material as well as a preparation method and application thereof. The chemical formula of the coordination compound magnetic material is {[Co3.5(H2O)2(trz)4(sip)].1.5H2O}, wherein trz is 1,2,4-triazole monovalent anion; and sip is trivalent anion of 5-sulfonyl m-phthalic acid. The coordination compound magnetic material is prepared by using a solvothermal method and has higher yield and good repeatability. The coordination compound magnetic material is the first case of cobalt (II) compound containing the 1,2,4-triazole and 5-sulfonyl m-phthalic acid mixed ligand, shows a magnetic transition phenomenon induced by a three-step field under different external magnetic fields, can be used as a molecule-based magnetic material and has great application value in the field of material science.

A magnetoresistive read head includes a spin valve having at least one free layer spaced apart from at least one pinned layer by a spacer. The free layer includes a cobalt compound as a thin film including at least one of Co—X, CoFe—X and CoNi—X, where X is an element from the lanthanoid family (a 4-f element). The content of Co is higher than 80 percent, and the content of the lanthanoid element is less than 10 percent. The film may comprise the entire free layer, or be positioned adjacent to one or more conventional free layer films. The pinned layer is a conventional single layer, or a synthetic multi-layered structure having a spacer between sub-layers. Because the spin valve structure has a high exchange stiffness and damping factor, spin transfer effect is reduced and a high-speed dynamic response is provided.

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.

[Problem] By obtaining a compound hydroxide that has a sharp particle diameter distribution, the present invention aims to improve the cycle properties of a nonaqueous electrolyte secondary cell obtained using the nickel-cobalt compound hydroxide as the precursor. [Solution] In the present invention, a slurry contains a nickel-cobalt compound hydroxide that is obtained by reacting and continuously feeding to a reactor an aqueous solution containing at least nickel and cobalt, an aqueous solution that serves as an ammonium ion donor, and an aqueous caustic alkali solution. The slurry is continuously extracted and the slurry is separated by grading into large particle diameter portions and small particle diameter portions. The small particle diameter portion is continuously circulated back to the reactor. The resulting nickel-cobalt compound hydroxide is represented by the general formula Ni1-x-yCoxMy (OH)2 (where 0.05 ≤ x ≤ 0.50, 0 ≤ y ≤ 0.10, 0.05 ≤ x + y ≤ 0.50, M is at least one metal element selected from Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga), wherein the correlations of (D50-D10)/D50 ≤ 0.30 and (D90-D50)/D50 ≤ 0.30 are established between D10, D50, and D90.

A pasted positive nickel hydroxide electrode for use in battery cells (e.g., in nickel zinc cells, and nickel metal hydride cells) includes nickel hydroxide particles, a cobalt metal and/or cobalt compound and a sulfur-containing complexing agent capable of forming a complex with cobalt. The presence of the sulfur-containing complexing agent, such as dialkyldithiocarbamate (e.g., sodium diethyldithiocarbamate) improves lifetime and capacity utilization of the nickel electrode. The resulting pasted nickel hydroxide electrode includes a CoOOH conductive matrix after formation. The surface of the nickel hydroxide particles in the electrode is modified in some embodiments by providing a cobalt-containing coating onto the surface of the nickel hydroxide particles, followed by oxidation with a strong oxidizing agent. The complexing agent can be added before, after, or during the oxidation.