58results about How to "Moderate conditions" patented technology

The invention relates to a preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres, and relates to the technical field of multi-level structured nano-grade catalyst materials. First, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are adopted as a nickel source and a cobalt source, a deionized water-isopropanol mixed phase with a proper proportion is adopted as a solvent, methanol is adopted as a reactant, and no additional base precipitating agent is adopted; a three-dimensional flower-shaped nano-sheet microsphere precursor is prepared in a Ni<2+>-Co<2+>-NH3-NH4<+>-SG<n->-H2O-IPA-CH3OH system (SG<n-> is CO3<2-> or HCOO<->); the temperature is increased to 300-400 DEG C in an air atmosphere with a speed of 1 DEG C/min, and the precursor is calcined for 2-3h, such that the three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are obtained. According to the invention, co-precipitation of the formulated cobalt and nickel in the raw materials is realized. The prepared three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are spinel cubic phases with high purity, and are formed by ultrathin nano-sheet self-assembly. The microspheres comprise rich mesopores, and have a large specific surface area. The method has the advantages of simple operation, appropriate conditions and easy control.

A method for producing a β-alkoxypropionamide shown by the following formula (I) including the step of reacting a β-alkoxypropionic acid ester with an amine in the presence of a basic catalyst or in the presence of a basic catalyst and a polyol:

wherein R₁ is an alkyl group having 1 to 8 carbon atoms, and R₂ and R₃ are independently hydrogen, a methyl group, an ethyl group, a methoxy group, an ethoxy group, a methoxymethyl group or a glycidyl group.

A process for producing a solubilized keratin of utility value easily with high yield while suppressing coloration and smelling occurring in the hydrolysis of keratin. There is provided a process for producing a solubilized keratin, characterized in that it comprises regulating the water content of keratin raw material to a hydrous state of 20 to 80%, hydrolyzing the same in an alkali solution, neutralizing the hydrolyzate liquid, and extracting a keratin hydrolyzate from the supernatant.

The invention relates to the field of microcapsule preparation, and in particular relates to a polyurethane mixed microcapsule and a preparation method thereof. The polyurethane mixed microcapsule includes a polyurethane-coated isocyanate microcapsule, a polyurethane-coated hydroxyl compound microcapsule and an auxiliary agen; a wall layer of the polyurethane-coated isocyanate microcapsule is polyurethane, a core layer is isocyanate; a wall layer of the polyurethane-coated hydroxyl compound microcapsule is the polyurethane, a core layer is a hydroxyl compound; the auxiliary agent is a polyurethane catalyst. The prepared polyurethane mixed microcapsule has good spandex compatibility, heat resistance and impermeability.

The invention relates to a preparation method for carbon-coated nano-titanium dioxide electrode material for a lithium-ion battery. The preparation method comprises the following steps: using titanium sulfate as a titanium source, and glucose or sucrose as a carbon source, weighing the titanium sulfate and the carbon source in a certain mass ratio, and respectively dissolving the titanium sulfate and the carbon source in deionized water; adding the aqueous solution of the carbon source into the aqueous solution of the titanium sulfate, stirring uniformly, and transferring to a hydrothermal reaction kettle; keeping temperature for a certain time, cooling, washing a resultant, filtering, and drying; under the protection of an argon atmosphere, calcinating at high temperature to obtain the carbon-coated nano-titanium dioxide electrode material. According to the preparation method for the carbon-coated nano-titanium dioxide electrode material, selected raw materials are low in cost; the prepared carbon-coated nano-titanium dioxide electrode material has excellent charge-discharge cycle performance, so that requirements on the electrode material of the lithium-ion battery can be met; the preparation method is simple in process and easy in industrial production.

The invention discloses a method for carrying out regeneration treatment on useless lubricating oil, and belongs to the technical field of an oil product quality improving technological process in a petroleum processing technology. The method comprises a solvent treatment step, a membrane separation step, a hydrogenation modification step, an adsorption, supplementation and purification step and a normal-pressure fractionation step. According to the method disclosed by the invention, most of metal and polar additives can be removed by adopting a solvent treatment method and a membrane separation method, aromatic hydrocarbon, heteroatoms, undissolved matters and most of residual carbon and residual metal can be removed through the hydrogenation modification step of a stationary bed, and residual polar additives can be further removed through the adsorption, supplementation and purification step, so that the light stability and the thermal stability of a product are increased, high-quality lubricating oil base oil can be produced, and byproducts of high-quality naphtha and high-quality diesel can be produced.

The invention provides an emulsifier composition and a preparation method thereof, belonging to the technical field of drilling fluids. The emulsifier composition comprises a main emulsifier, an auxiliary emulsifier and base oil, wherein the main emulsifier is oxidatively polymerized fatty acid ester and the auxiliary emulsifier is polyamide. The emulsifier composition provided by the invention respectively uses oxidatively polymerized fatty acid ester and polyamide as the main emulsifier and the auxiliary emulsifier, so emulsification efficiency of the composition is improved, electrical stability of the composition is enhanced, and preparation and usage of oil-based drilling fluids are facilitated.

A support for a catalyst for controlling vehicular exhaust emissions comprising a high surface area refractory metal oxide, e.g., gamma-alumina, having a monomolecular layer of a second oxide selected from the group consisting of titanium dioxide, cerium dioxide and zirconium dioxide. Typically, the monomolecular layer will have a thickness of less than about 10 angstroms. The support may be converted into a vehicular exhaust emission control catalyst by depositing the support on a substrate such as cordierite depositing a precious metal component such as platinum on at least part of the monomolecular layer. Preferably, the catalyst will also contain at least one NOx storage component deposited on at least part of the monomolecular layer. Catalysts prepared using the catalyst supports of the invention exhibit outstanding thermal stability and resistance to sulfur poisoning.

The invention provides a negative electrode active material of a lithium ion battery. The negative electrode active material is a powder composite material prepared from a carbon-coated compound of which the molecular formula is Li4+xTi5O12, wherein x is more than 0 and less than or equal to 3. A method for preparing the negative electrode active material comprises the following steps of: fully mixing three types of powder materials of a lithium source, a titanium source and a carbon source in an inert-gas-protected atmosphere, and performing high-temperature solid-phase sintering; and cooling to the room temperature. The negative electrode active material is a lithium-rich lithium titanate material with a stable structure in the air at normal temperature and normal pressure, is convenient to manufacture, use and store, and can be popularized and used on a large scale; and for the lithium ion battery prepared from the negative electrode active material, the first cycle coulombic efficiency is 100 percent higher than a theoretical value, and the first cycle irreversible capacity loss of the battery is eliminated. The method for preparing the negative electrode active material is moderate in condition and simple in technological process, can be very easily applied to industrial production, and is environment-friendly.

The invention belongs to the technical field of sewage processing, and concretely relates to a method for preparing an active carbon fiber (ACF)-loaded Co3O4 catalysis material. The method comprises the following steps: weighing a proper amount of active carbon fiber and placing the active carbon fiber in a nitric acid solution for immersion, taking ACF out and using distilled water for washing bymultiple times to a neutral state, after drying, adding Co(NO3)2.6H2O and Na(NO3)2 in a hexyl alcohol beaker, performing magnetic stirring to uniform mixing, transferring the material to a round-bottom flask, adding pre-treated active carbon fiber in the round-bottom flask, and after immersion for 10 h, performing oil-bath backflow heating. The method is used for preparing the Co3O4/ACF catalyst,on one hand, absorption effect of the active carbon fiber is used, dye waste water is absorbed surrounding the active carbon fiber, on the other hand, the catalyst Co3O4 is loaded on the active carbon fiber, the catalyst has low dissolution rate and high-efficiency catalytic oxidation effect, and has good degradation effect on the high-concentration difficultly-degraded dye waste water.

The invention discloses a method for bionically preparing water-soluble gold nanoparticles. In the method, the water-soluble gold nanoparticles are prepared in the like biological system based on the reduction reaction and enzyme catalysis process in the cells. The method is simple and practicable, the used reagent is environmentally friendly and the controllable gold nanoparticles with uniform size can be obtained under room temperature. With surfaces cladded by a layer of dense glutathione molecules, the products have good stability in the aqueous solution. The method provides a new train of thought for green synthesis of nano materials.

The invention relates to a 3-cyan substituted indole compound and a synthetic method thereof. The constitutional formula of the compound is that R1 is a methoxy group, and R2 is phenyl (Ph), benzyl (Bn), allyl or n-butyl. According to the synthetic method of the 3-cyan substituted indole compound, raw materials are easy to obtain, novel tertiary butyl isonitrile is firstly used as a source of cyan, and high toxic metal cyanide is avoided to be used. During the reaction, conventional reaction solvents are used, the operation is simple, the operation condition is moderate, the reaction is environment-friendly, the top yield can reach 74%, and the 3-cyan substituted indole compound has a good application prospect in industrial production.

The methods for preparing Cu-BTC and nano-Cu-BTC are disclosed. An imporous coordination compound Cu(C₉H₄O₆)(H₂O)₃ is impregnated an organic solvent or a steam environment thereof to obtain Cu-BTC. Cu-BTC is impregnated in an acidic protic solvent environment and filtered to obtain a solid, and the solid is impregnated in a non-acidic organic solvent or a steam environment thereof, centrifuged, washed, and dried, to obtain nano-Cu-BTC.

The invention discloses a preparation method of a biological template for porous tubular nano-metal oxide. A sorghum straw with a natural multi-dimensional fine, graded and porous structure is taken as a biological template, and porous tubular nano-metal oxide is formed in situ by virtue of the biological template through immersion treatment and subsequent hydrothermal reaction and oxidizing roasting. The preparation method has the beneficial effects that the process is simple, conditions are moderate, the controllability is good, and the industrial production is easily realized. The material prepared by virtue of the preparation method has a fine pore structure and a high specific surface area, so that the surface response characteristic and reuse performance of the material can be greatly improved, and the material has wide application prospects in the fields of gas sensors, photocatalysis, supercapacitors and lithium ion battery electrode materials and the like.

The invention discloses a method for preparing a lithium ion battery negative electrode material lithium titanate, belonging to the technical field of battery electrode materials. The method comprises the following steps: (1) dripping a lithium-containing solution into a tetrabutyl titanate solution, fully and uniformly stirring, thereby obtaining emulsion; (2) adding the emulsion into a drying box to react until the emulsion becomes a solid-state product; and (3) grinding the solid-state product prepared in the step (2), and performing heat treatment, thereby obtaining the lithium ion battery negative electrode material lithium titanate. According to the method disclosed by the invention, the preparation process is simple in process, the conditions are moderate, special process equipment is not needed, and industrial production is easily realized. The lithium titanate material prepared by the method disclosed by the invention is high in purity and high in crystallinity and can reach the nanoscale, the lithium ion diffusion path is effectively shortened by the material, the rate performance is improved, and the material has good electrochemical performance.

The invention relates to a 2-cyano-substituted indole compound and a synthetic method thereof. The structural formula of the compound is shown in the specifications, wherein R1 is pyridyl or pyrimidinyl; and R is methyl, methoxyl, bromine or -CO2Me. The 2-cyano-substituted indole compound prepared with the method is a type of important organic synthetic intermediate. The method has the advantages of readily-available raw materials, high reaction selectivity, adoption of novel isocyanide as a cyano source, use of the conventional solvent in a reaction, easiness for operating, appropriate reactions, environment-friendly reaction, maximum reaction yield of up to 92 percent, applicability to industrial production and the like.