47results about How to "Fast catalytic speed" patented technology

The invention relates to the field of carrier rocket posture control systems, in particular to a hydrogen peroxide posture control system applied to a solid-liquid hybrid power carrier rocket. The system includes four pitching rolling posture control engines and two yawing posture control engines; the two yawing posture control engines are arranged in the positive and negative directions of a Z axis of the outer side of a rocket three-sublevel main engine separately; the first pitching rolling posture control engine is installed on the surface of the main engine, and a 40-degree included angleis formed between the first pitching rolling posture control engine and the negative direction of the Z axis; the fourth pitching rolling posture control engine is installed on the surface of the main engine, and a 40-degree included angle is formed between the fourth pitching rolling posture control engine and the positive direction of the Z axis; the other two pitching rolling posture control engines are installed symmetrically on the surface of the main engine relatively to an XZ plane. According to the scheme, six posture control engines are adopted as propelling force, the number of thrusters is small, invalid loads can be reduced to a great extent, and the conveying capability of the whole carrier rocket is improved. Meanwhile, the failure rate of the posture control system is decreased, and the stability and safety of the system are improved.

The invention relates to an Mg/Al/X ternary composite metal oxide catalyst and a preparation method thereof. The catalyst is characterized in that the catalyst consists of magnesium, aluminum and ternary metal elements, and the surface of a catalyst product is distributed with an aperture of which diameter is 1 to 20mu m and a protrusion of which height is 0.1 to 10mu m; and the ternary metal elements contain Ce, Dy, Fe, Mn, Co, Cd, Zn or Ni soluble salt comprising nitrate, hydrochloride, sulfate, phosphate or perchlorate. The preparation method for the catalyst comprises the following processes in turn: precursor preparation, crystallization, secondary crystallization, molding and calcination. The catalyst is applicable to the production process of the conventional kettle-type or intermittent polyether product, has good narrow molecular-weight distribution effect for the synthesis of the polyether product, has high catalytic rate, and can be recycled.

The invention belongs to the field of acetic acid preparation realized through methanol carbonylation reaction and particularly relates to a catalyst system for synthesizing acetic acid through methanol carbonylation and application of the catalyst system. The catalyst system for synthesizing acetic acid through methanol carbonylation comprises active rhodium, hydroiodic acid or iodine, methyl iodide, water, a lithium acetate aqueous solution and acetic acid, wherein the mass percentage of active rhodium in the whole reaction system is 800-1000ppm, the content of total iodine in the whole reaction system is 2.8-3.5mol/L, the mass percentage of the lithium acetate aqueous solution in the whole reaction system is 8000-12000ppm, the mass percentage of methyl iodide in the whole reaction system is 8-13%, the mass percentage of the water in the whole reaction system is 2%, and the mass percentage of acetic acid in the whole reaction system is 57-62%. By using the catalyst system, methanol can be converted into acetic acid at high speed and relatively-low pressure, so that the production cost of acetic acid is low, the formula is simple, the production process is easy, and byproducts including CO2, H2 and propionic acid are greatly reduced.

The invention relates to a stirring device, in particular to the stirring device for refining petroleum in Chemical industry. The technical problem to be solved in the invention is to provide the stirring device for refining petroleum in Chemical industry with uniform stirring, impurity filtering and high catalytic speed. In order to solve the technical problem, the invention provides the stirringdevice for refining petroleum in Chemical industry, which comprises a bottom plate and the like, wherein a catalytic tank is arranged at the top of the bottom plate, and a cover plate is connected atthe top of the left side of the catalytic tank in a hinging way; a screen plate is arranged in the middle of the inside of the catalytic tank, and a mixing device is arranged at the upper part of thecatalytic tank; a stirring device is arranged at the lower part of the catalytic tank. The stirring device for refining petroleum in Chemical industry provided by the invention achieves the effects of stirring evenly, filtering impurities and increasing the catalytic speed. The device firstly mixes the crude oil and the catalyst by a stirring roller, then filters the impurities through the screenplate, and then stirs the crude oil and the catalyst by the stirring device to achieve the effect of fully catalyzed mixing.

The invention belongs to the nano-biotechnology and a nano-catalysis aquaponics method. The existing aquaponics technology has the disadvantages that the fish excrement decomposition speed is low, aquaponics starting time is long and production efficiency is low. The method includes the steps of preparing aquaponics nano-catalysts, smashing tourmaline, medical stone and zeolite till the density of meshes reaches 2500, accurately weighing purple grit mud, tourmaline, nanometer titania, nanometer magnesia, medical stone and zeolite, mixing all the compositions, pressing the mixture into a grain shape or a tablet shape with water content of 20%, sintering the mixture at a temperature of 1100 DEG C to 1200 DEG C for 10 hours, placing the nano-catalysts and aquaponics microbial strain bacillus into a fish breeding water body, pumping out fish breeding pool water to be used for vegetable planting, making water absorbed by vegetables flow back into the fish breeding water body, and repeating the circulating. The nano-catalysis aquaponics method has the advantages of being high in catalysis speed, quick in fish excrement decomposition, and capable of shortening the aquaponics starting time, saving resources and improving the aquaponics production efficiency.

The invention relates to a nickel-based magnetic compound material as well as a synthesis method and application thereof. The synthesis method comprises the following steps: adding deionized water into NiCl2.6H2O, N,N'-bis(4-methylene pyridine)benzene-1,4-dicarbonamide and trimesic acid, carrying out hydrothermal reaction in a high pressure reactor, and generating an organic ligand Ni complex [Ni3(4-bmbpd)3(BTC)2(H2O)4].4H2O; and grinding and smashing the Ni complex by adopting an agate mortar, dispersing into ethyl alcohol, grinding by adopting a ball grinding mill, carrying out centrifugal separation to obtain a microcrystalline Ni complex material, placing into a tubular furnace under the protection of nitrogen, and calcining, so that the nickel-based magnetic compound material is obtained. The nickel-based magnetic compound material is applied to photocatalytic degradation of an organic dye pollutant material. The nickel-based magnetic compound material provided by the invention has the advantages that catalysis speed is high, efficiency is high, recycling and reusing can be facilitated, photocatalytic degradation rate on a methylene blue organic pollutant can reach 96% and thenickel-based magnetic compound material can be taken as a methylene blue organic pollutant photocatalytic degradation material.

The invention discloses a micron-scale elemental copper catalyst and a preparation method and application thereof. According to the key points of the technical scheme, the micron-scale elemental copper catalyst is prepared by the steps of reacting copper salt with an organic ligand to form a precursor and then performing calcination under the protection of nitrogen at the temperature of 400 to 800 DEG C, wherein the molar mass ratio of the copper salt (n) to the organic ligand (n) is (1-4) to 1, the copper salt is Cu(NO3)2.3H2O, and the organic ligand is 1,3,5-trimesic acid, terephthalic acid, isophthalic acid, phthalic acid, formic acid or 4,4',4''-s-triazine-1,3,5-three-para aminobenzoic acid. The invention further discloses the preparation method of the catalyst and the application of the catalyst to processing of nitrophenol waste water. The micron-scale elemental copper catalyst has the advantages of environmental friendliness, simple preparation process, high innovativeness and practicability and the like, nitrophenol pollutants in organic waste water can be effectively catalyzed and degraded, and the catalyst has circulating renewable use performance.

The invention provides a catalyst for improving the content of cycloalkane in tar through microwave pyrolysis of low-rank coal as well as a preparation method and application of the catalyst, belonging to the technical field of microwave catalytic pyrolysis of low-rank coal. According to the catalyst for improving the cycloalkane content in the tar through microwave pyrolysis of the low-rank coal, catalytic active substances play a main catalytic role, and a cocatalyst can improve the connecting capacity of a catalyst carrier and the catalytic active substances, so the catalytic active substances are not leached in a reaction process, and the stability and the service life of the catalyst are improved; and the catalyst carrier has a high dielectric coefficient and a large specific surface area, can effectively improve the microwave absorption capability of the whole catalyst, improves a heating rate, accelerates a reaction speed, promotes a pyrolysis reaction, promotes the generation of small molecular free radicals, and increases the yield of pyrolysis tar and the content of cycloalkane in the pyrolysis tar.

The invention discloses a preparation method of a jellyfish-shaped carbon nitride photocatalytic material with high specific surface area. The main preparation process is as follows: performing combustion on a raw material hydrocarbon in the air and enabling one part of the raw material hydrocarbon to be cracked to generate carbon black; performing stirring and ultrasonic treatment on a reaction mixture of melamine and polyacrylamide at room temperature, and transferring the reaction mixture into a drying oven to dry; putting the product into a muffle furnace, heating at 500 to 600 DEG C and at the heating rate of 20 DEG C/minute for 100 to 150 minutes, adding the obtained carbon black when the temperature is decreased to 300+/-10 DEG C, mixing, stirring uniformly, and grinding by an agatemortar into uniform powder to obtain the novel jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area. In the prepared jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area, the specific surface area of the g-C3N4 is increased by 10 to 30 times, the carbon black can serve as an ultraviolet stabilizer due to the light stability, and the durabilityof the photocatalytic material is improved. The preparation method is cheap in raw material, simple in process and suitable for industrialized mass production.

The present invention provides a coal liquefaction catalyst and a coal liquefaction method using the coal liquefaction catalyst. The coal liquefaction catalyst comprises 1-99 wt% of hydroxyl iron oxide and 99-1 wt% of iron sulfide, wherein sulfur in the iron sulfide is 0.46-45 wt% of the total mass of the catalyst. The present invention further provides a method for carrying out coal liquefaction by using the catalyst. The method comprises: adding the coal liquefaction catalyst to a coal oil mixture under an air-free condition, uniformly mixing to obtain a slurry mixture, mixing with hydrogen, preheating, carrying out a hydrogenation reaction at a certain temperature under a certain pressure, and separating after completing the reaction to obtain the coal liquefaction material. The coal liquefaction catalyst has advantages of low catalysis cost and good catalysis effect.

The present invention relates to biocatalysts catalyzing the formation of α-olefins. In particular, the invention provides polypeptides with improved decarboxylase activity on C₁₀-C₁₆ free fatty acids, more particularly on C₁₀ or C₁₂ free fatty acids, as compared to the P450 fatty acid decarboxylase isolated from the Staphylococcus massiliensis strain S46 (Sm46). The invention further provides recombinant nucleic acids and vectors comprising the coding sequences encoding these polypeptides, genetically engineered host cells expressing said polypeptides and methods for the production of C₉-C₁₅ α-olefins, more particularly C₉ or C₁₁ α-olefins, using said polypeptides or said host cells.

The invention relates to a quick-drying high-gloss varnish of automobile refinishing paint and a preparation method of the varnish. The varnish comprises a component A and a component B, and the massratio of the component A to the component B is (2-6):1. (1) The component A comprises the following components in percentage by mass: 60-65% of acrylic resin, 30%-40% of a solvent and 4%-7% of an assistant; and (2) the component B comprises the following components in percentage by mass: 80-85% of a polyisocyanate curing agent and 15-20% of a solvent. Compared with the prior art, the varnish provided by the invention has the following advantages that the special modified acrylic resin and a catalyst are used, so that grinding and polishing can be carried out after 25 minutes at a normal temperature (25 DEG C) while performance of the varnish is ensured.