18results about How to "Moderate reaction temperature" patented technology

The invention provides a grain boundary coating method of a polycrystalline positive electrode material and a grain boundary coated polycrystalline positive electrode material.The grain boundary coating method of the polycrystalline positive electrode material comprises the following steps that the polycrystalline positive electrode material is placed in a furnace tube of a tube furnace to be heated, and a gas-phase reaction source diffuses into the polycrystalline positive electrode material along a grain boundary under the action of airflow pressure, the gas-phase reaction source reacts on the surface and the grain boundary of the polycrystalline positive electrode material, so that a coating layer is formed on the surface and the grain boundary of the polycrystalline positive electrode material, and the grain boundary coated polycrystalline positive electrode material is obtained. According to the method, the gas-phase reaction source is subjected to chemical reaction on the surfaces of the primary particles of the polycrystalline positive electrode material to form the required grain boundary coating layer, so that the defects of non-uniform coating, incapability of directly coating the primary particles and the like in the prior art are overcome.

The present invention is a hydrogenation reactor for preparing high energy density fuel, comprising a tank body, wherein the tank body is provided with a temperature control module, a filter module and a reaction module from top to bottom; the side wall of the upper section of the tank body of the temperature control module is hollow to form an upper medium containing layer, and the inner wall extends to the middle to form a hollow partition; the filter module is located below the temperature control module and is connected to the temperature control module, and the filter module is detachably provided with three layers of filter drawers with apertures from large to small from top to bottom; the reaction module comprises a plurality of inclined catalyst plates, a lower catalyst plate and a hydrogen spray hood. The hydrogenation reactor for preparing high energy density fuel described in the present invention can significantly improve the efficiency of the reaction and increase the stability and balance of the reaction.

The invention belongs to the field of medicine synthesis, and particularly relates to a nitration method of an indole derivative. According to the invention, acetonitrile is taken as a solvent, indole or substituted indole is taken as a substrate, copper nitrate trihydrate is taken as a nitration reagent, paratoluensulfonyl chloride is taken as an accelerant, and a series of 3-nitroindole derivatives are obtained under mild conditions in a simple and high-yield manner. The synthesis method disclosed by the invention has the characteristics of easily available raw materials, wide substrate application range, short reaction time, simplicity in operation, easiness in amplification and the like.

The invention provides a method for synthesizing tris(p-toluenesulfonyloxymethyl)nitromethane, wherein tris(hydroxymethyl)nitromethane and p-toluenesulfonyl chloride are used as raw materials, and an acylation reaction is performed in a solvent ethyl acetate at a reaction temperature of 15°C to 30°C to generate tris(p-toluenesulfonyloxymethyl)nitromethane. The invention uses ethyl acetate to replace pyridine with relatively high toxicity, and the temperature does not need to be controlled at 0°C during the reaction, and the reaction can be carried out at 15°C to 30°C, and the reaction time is reduced from 24h to 18h, and the yield is 96.9%.

The present application belongs to the technical field of natural product chemical modification, and particularly relates to a chemically modified rare ginsenoside derivative, a preparation method and application thereof. The present application takes rare ginsenoside as raw material, introduces a sulfate group by sulfating modification on the rare ginsenoside to obtain a chemically modified rare ginsenoside derivative; the modifier used in the sulfating modification is a sulfonating agent. The rare ginsenoside is synthesized by conversion with ginsenoside Rb1 as raw material and AlCl3 as catalyst in an ethanol system. The modification method of the present application is simple in operation steps, does not require special equipment, is suitable for large-scale production, and has a broad application prospect in the field of drug preparation development and the like.

The utility model discloses an industrial silicon flue gas comprehensive treatment system capable of reducing pollution and carbon, which comprises a flue, a waste heat boiler, an SDS (Sodium Dodecyl Sulfate) dry desulfurization device, a cloth bag dust removal device, an SCR (Selective Catalytic Reduction) denitration device, a carbon capture device and a chimney which are sequentially communicated, and the waste heat boiler is connected with the carbon capture device through a steam pipeline. A large amount of system energy consumption can be saved, the occupied area is small, the process technology is simple and practical, and operation is stable. The desulfurizer is wide in source, low in price, few in by-products, high in sodium sulfate content and convenient to use. And due to the recovery of the silica fume, the enterprise benefit is improved, and the secondary pollution is reduced. The medium and low temperature SCR denitration reduces the poisoning and blocking risks of the catalyst, prolongs the service life of the catalyst, reduces the operation cost, and can adapt to the complex and changeable flue gas working conditions of the industrial silicon electric furnace.

The invention discloses a preparation method of 2-methyl-4-aminoquinoline, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: by taking 2-methylquinoline as a raw material, carrying out nitrogen oxidation reaction under the action of 3-chloroperoxybenzoic acid (mCPBA) without purification; then carrying out nitration reaction in iron nitrate nonahydrate and isopropanol; then, under the tetrahydroxy diboron / alkaline condition, 2-methyl-4-aminoquinoline is generated through reduction. Easily available 2-methylquinoline is adopted as a raw material, nitrogen oxidation is performed, a ferric nitrate nitration system is adopted, and finally amino is introduced through reduction, so that harsh conditions in a traditional method are avoided, the route is simple and efficient, product separation and purification are simple, and the method is suitable for being carried out under industrial amplification conditions.

According to the preparation method, ZIF-67 is taken as a template, nickel nitrate and copper porphyrin are added at the same time, and the metalloporphyrin intercalated double-metal hydroxide material is successfully prepared through acid etching. The material is composed of copper porphyrin Cu-TCPP and hollow NiCo-LDH, and has a hollow porous structure and a large specific surface area. Benefited from the synergistic effect of Cu-TCPP and NiCo-LDH, only 204mv overpotential is needed when the material reaches the current density of 10mA. Cm <-2 >, the material is superior to transition metal-based OER electrocatalysts reported in most literatures, the performance is almost unchanged after a stable test for 12 hours, and the material has a relatively good application prospect.

This invention relates to the field of air pollution control technology, specifically a high-temperature flue gas emission desulfurization and denitrification device, comprising a denitrification mechanism and a desulfurization mechanism. The denitrification mechanism employs a vacuum-jacketed mounting cylinder, which contains an array of denitrification arc-shaped guide holes and a combined denitrification module. The module includes a denitrification guide cylinder, an arc-shaped filter screen, and a limiting guide cylinder with oblique guide grooves, effectively expanding the catalytic area and uniformly distributing the flow. A back-blowing fan and an elastically limiting rotating guide plate are also included to achieve online vibration self-cleaning. The desulfurization mechanism introduces flue gas into the desulfurization mounting cylinder through a gradient annular guide cylinder and uniformly enlarging inlet holes from top to bottom, forming a gradient three-dimensional desulfurization. A bottom discharge drive and a spiral guide plate ensure uniform catalyst renewal. This device has a compact structure, excellent insulation and airflow organization, and solves problems such as ash accumulation and blockage, difficult maintenance, and low catalyst utilization in existing technologies, thus improving denitrification and desulfurization efficiency and continuous operation stability.

The utility model discloses an industrial silicon flue gas comprehensive treatment system which comprises a flue and a chimney at the tail end of the flue, and a high-temperature waste heat boiler, an electric dust removal device, a low-temperature waste heat boiler, an ozone denitration device, a wet desulphurization device and a carbon capture device are sequentially arranged on the flue. The high-temperature waste heat boiler and the low-temperature waste heat boiler are further communicated with the carbon capture device through steam pipelines to supply steam to the carbon capture device, and the waste water output end of the wet desulphurization device is communicated with a flue between the electric dust removal device and the high-temperature waste heat boiler. According to the system and the method, high-efficiency utilization of heat is achieved, CO2 in flue gas can be captured while conventional pollutants such as NOx, SO2 and particulate matter are removed, a large amount of system energy consumption is saved, high-purity silica fume can be recycled, enterprise benefits are improved, secondary pollution is reduced, zero emission of desulfurization wastewater can be achieved, chloride ions in the system can be effectively removed, and desulfurization water consumption is saved.

The utility model belongs to the technical field of choline chloride preparation equipment, and discloses a graphite reaction device for a choline chloride salifying process, which is characterized in that a graphite reaction kettle is communicated with a block hole type heat exchanger through a connecting pipeline; the graphite reaction kettle comprises a metal shell, a graphite lining and a stirring device, and the graphite lining is fixed on the inner side of the metal shell; the inner side of the block hole type heat exchanger is filled with a graphite heat exchange block, and a plurality of rows of transverse through holes and longitudinal through holes are formed in the middle of the graphite heat exchange block. The graphite reaction kettle is communicated with the block hole type heat exchanger, so that materials in the graphite reaction kettle can circularly flow in the block hole type heat exchanger, proper reaction temperature can be guaranteed while the materials react, chemical reaction is facilitated, heat generated by the reaction can be quickly and uniformly dispersed by the graphite lining, and the heat transfer efficiency is improved. Therefore, the adverse effect on the material caused by the overhigh reaction temperature is avoided.

The utility model discloses a novel heat exchange device for unsaturated polyester resin production, which comprises a reaction kettle, the upper end of the reaction kettle is fixedly provided with a feed pipe, the lower end of the reaction kettle is fixedly provided with a discharge pipe, and the left side and the right side of the upper side of the outer surface of the reaction kettle are respectively and fixedly communicated with a heat exchange pipe and an exhaust pipe. A motor is fixedly mounted at the upper end of the reaction kettle, a plurality of stirring rods are fixedly mounted on an output shaft of the motor, and an air cylinder is fixedly mounted on the right side of the upper end of the reaction kettle. According to the technical scheme, the novel heat exchange device for unsaturated polyester resin production is provided. Three-dimensional stirring is realized through the synergistic effect of the stirring rods and the annular plates, flowing dead angles are eliminated, all materials are ensured to be in full contact with a heat exchange medium, the uniformity of the materials is improved, the materials in the reaction kettle can be ensured to reach a proper reaction temperature, and the curing degree and the crosslinking density of resin are improved, so that the product quality is improved.

This application relates to an iron oxide preparation device based on a Venturi tube, comprising a reaction vessel, a Venturi tube, a circulating pump, an oxygen storage device, and a mixing cylinder. The reaction vessel contains a solid-liquid mixture and is equipped with a circulating gas outlet, a circulating liquid outlet, and a circulating liquid inlet. The mixing cylinder mixes air and oxygen before introducing it into the Venturi tube. The liquid reactant enters the Venturi tube via the circulating pump. After thorough mixing of gas and liquid in the Venturi tube, the mixture returns to the reaction vessel. A stainless steel heating tube provides a heating environment within the reaction vessel. The device also includes a filter tank, a fine-pore baffle, a liquid level sensor, a temperature sensor, and an oxygen content sensor. This application achieves the technical benefits of ensuring sufficient reaction between oxygen in the air and the solid-liquid mixture, producing iron oxide yellow, iron oxide red, and iron oxide black according to different proportions, improving the versatility of the device, increasing the efficiency of the circulating pump, extending its service life, ensuring the reaction proceeds at suitable temperature and oxygen content, and facilitating product discharge.

The invention discloses a high-end healthy protective fabric processing technology and equipment, and belongs to the field of fabric processing equipment. The problems that when existing fabric processing equipment is used for soaking, solution circulation is poor, raw material reaction is uneven, the solution temperature is difficult to control, impurities are prone to blockage, and much solution is wasted during dehydration are solved. According to the technical scheme, the top of a solution barrel is fixedly communicated with a top barrel, two symmetrical air cylinders are arranged on the outer wall of the solution barrel, air cylinder piston rods are connected with a fixing frame, a motor is installed on the fixing frame, and a motor output shaft is connected with a driving shaft which slidably penetrates through the top barrel and is connected with a soaking barrel with a hole and a blocking cover; a heat exchange cover with a heating wire is arranged on the inner wall of the bottom of the solution barrel; a blow-off pipe with filter holes and spiral pushing blades is arranged on the side of the solution barrel, a rotating shaft with stirring blades and a positioning assembly are arranged at the bottom of the soaking barrel, and the top barrel is matched with the soaking barrel to achieve dehydration. The method is mainly used for preparing high-end healthy protective fabric, reaction uniformity and processing quality can be improved, and solution waste is reduced.

This invention provides a rapid reaction device for qPCR detection reagents, belonging to the field of biotechnology. It includes a housing with a temperature control component on one side and a reagent placement component on the top. Through the temperature control component, the fins, acting as efficient heat exchangers, rapidly absorb and release heat. When hot air passes through the fins, heat is quickly transferred to the entire inner chamber, raising the internal temperature. When cold air passes through, the fins absorb heat and transfer it to the cold air, thus lowering the internal temperature. The combination of hot and cold air blowers and the fins allows for rapid response to temperature regulation needs, achieving precise temperature control within the housing, meeting the requirements of rapid qPCR detection reagent reactions, and improving detection efficiency.

The utility model discloses an industrial silicon flue gas denitrification, desulfurization and dust removal system, which comprises a flue, a high-temperature waste heat boiler, an SCR (selective catalytic reduction) denitrification device, a medium-temperature waste heat boiler, an SDS (sodium dodecyl sulfate) dry desulfurization device, a cloth bag dust removal device and a chimney which are sequentially communicated. The device can adapt to complex and changeable flue gas working conditions of the industrial silicon electric furnace.

The utility model discloses an illumination reactor, and belongs to the technical field of gas catalysis quantitative determination. The device comprises a reaction box body, a gas conveying system and a gas circulating system, the reaction box body comprises an inner shell, an outer shell and a luminous box cover, the inner shell and the outer shell are arranged in a nested manner, an interlayer space for accommodating cooling water is formed between the inner shell and the outer shell, and the box cover covers the inner shell and the outer shell so as to seal and separate an inner cavity of the inner shell from the interlayer space; the gas conveying system can input or output reaction gas into or out of the inner shell; the gas circulation detection system comprises a peristaltic pump, a three-way valve and a gas chromatograph, one end of the peristaltic pump is communicated with the inner shell through a pipeline, and the other end of the peristaltic pump is respectively communicated with the gas chromatograph and the inner shell through the three-way valve, so that reacted gas substances are detected or reaction gas is driven to circularly flow. According to the utility model, uniform reaction of gas can be promoted, and the reaction efficiency of photocatalytic reaction is improved.

The utility model discloses a multistage uranium conversion fluidized bed reactor, which belongs to the technical field of hydrofluorination or hydrogen reduction process in uranium purification conversion process, and comprises a reactor main body, the reactor main body comprises N stages of fluidized bed layers, N is greater than or equal to 2, N is an integer, and the N stages of fluidized bed layers are the first-stage fluidized bed layer to the Nth-stage fluidized bed layer in sequence from top to bottom, gas distribution plates are arranged at the bottoms of the N stages of fluidized bed layers, every two adjacent stages of fluidized bed layers are separated by the corresponding gas distribution plate, an overflow pipe is arranged between every two adjacent stages of fluidized bed layers, and the overflow pipes penetrate through the gas distribution plates to be communicated with the two adjacent stages of fluidized bed layers. The utility model has the beneficial effects that the multi-stage shallow fluidized bed is adopted, so that the fluidized bed can keep higher fluidization quality, and the overflow pipe is arranged between two adjacent fluidized bed layers, so that particles among the bed layers can be continuously and stably conveyed, and the production stability of the device and the long-period safety and reliability of the device are favorably guaranteed.