13results about How to "Continuous response" patented technology

The invention aims at disclosing a magnesium hydride continuous production device and process, and relates to the technical field of magnesium hydride preparation, the magnesium hydride continuous production device comprises a sealing shell, a heating inner container, a power assembly, a feeding assembly, a discharging assembly, an inert gas replacement assembly and a hydrogenation inlet; the heating inner container comprises a side wall, a feeding end and a discharging end, a plurality of gas one-way valves are arranged on the side wall, a spiral propeller, a plurality of steel balls and / or a plurality of steel bars are arranged in the heating inner container, and a filter screen is arranged at the discharging end; a conical part and a recycled material port are arranged at the bottom of the sealed shell; the feeding assembly comprises a feeding lock hopper and a feeding pipe, and the feeding pipe communicates with the feeding end. The discharging assembly comprises a discharging pipe and a discharging lock hopper, and the discharging pipe is communicated with the discharging end; the method has the technical effects that the particle size of the magnesium powder is 10-300 microns, the particle size of the produced magnesium hydride is 50-800 nm, continuous feeding, continuous reaction and continuous discharging can be realized, large-scale production of the magnesium hydride is realized, and the hydrogen storage density of the magnesium hydride is not less than 7 wt%.

The invention provides a method for preparing diisooctyl cyclohexane-1, 4-dicarboxylate through continuous catalytic hydrogenation, which is characterized in that a Venturi reactor is used for reaction, and the diisooctyl cyclohexane-1, 4-dicarboxylate is continuously produced by combining a membrane separation process and a vacuum distillation process. Wherein the Venturi reactor can provide a higher gas-liquid mixing ratio, the contact area of gas, solid and liquid phases is large, the mixing effect is good, the mass transfer efficiency is high, and the reaction rate is high. And the membrane separation process can separate the mixed liquid from the catalyst, so that efficient utilization of the catalyst is realized. The energy consumption can be effectively reduced through the vacuum distillation process, and the equipment investment and the operation cost are reduced. According to the present invention, the hydrogenation reaction can be performed under the mild hydrogenation operation condition, and in the whole loop reaction system, the temperature distribution is uniform, the local overheating phenomenon does not exist, and the side reaction is effectively reduced. The method is simple in process, mild in reaction condition, short in reaction time and high in production efficiency, the reactant conversion rate and the target product selectivity are up to 99% or above, and the method is suitable for industrial production.

The utility model belongs to the technical field of micro-reactors, and particularly relates to a multi-stage series micro-reactor which comprises a substrate with a fluid channel etched inside, the substrate is provided with a fluid inlet and a fluid outlet which are communicated with the fluid channel, the fluid channel comprises a plurality of micro-mixing grooves, and the micro-mixing grooves are communicated with the fluid inlet and the fluid outlet. The adjacent micro mixing grooves are connected through a contraction section, a jet flow opening is formed in an inlet of each micro mixing groove, a splayed flow baffle and a flow dividing column which are arranged corresponding to the jet flow openings are arranged in each micro mixing groove, and each flow dividing column is arranged at the downstream of the corresponding splayed flow baffle. According to the device, fluid to be mixed is continuously split, compounded, stretched and crushed in a jet manner, the contact area is increased, the uniform distribution performance of the fluid is improved, and the mixing process of the fluid can be enhanced, so that rapid mixing and efficient and continuous reaction are realized.

The present invention relates to a method for continuously producing 5-hydroxymethylfurfural and 2,5-furandicarboxylic acid. The method of the present invention starts from fructose-based carbohydrates, continuously produces important biomass-based platform compound 5-hydroxymethylfurfural and functional polymer material monomer 2,5-furandicarboxylic acid, and in the process of producing 2,5-furandicarboxylic acid, avoids the separation and purification process of 5-hydroxymethylfurfural, and has the advantages of simple process, low generation and emission of three wastes, environmental friendliness, etc.

The invention belongs to the technical field of chemical equipment, and particularly relates to a fixed bed reactor for bearing an emulsion droplet catalyst, the fixed bed reactor comprises a reactor main body, and connecting flanges are arranged at the upper end and the lower end of the reactor main body; a quick-open type cover plate is connected to the connecting flange, and a liquid inlet spraying device is arranged on the quick-open type cover plate at the upper end; a conical closing opening is formed in the lower end of the reactor main body, a filter screen is arranged at the lower end of the conical closing opening, a plurality of layers of catalyst bearing assemblies are arranged in the reactor main body, and hydrophobic screens in the filter screen and the catalyst bearing assemblies are subjected to chemical modification treatment. According to the invention, the filter screen and the hydrophobic screen are arranged and are chemically modified, so that the fixed bed reactor has hydrophobicity, the emulsion catalyst can be filled in the fixed bed reactor, and long-term stable existence under a flowing condition is realized, so that efficient and continuous reaction of a two-phase system is realized.

The invention belongs to the technical field of chemical equipment, and particularly relates to a fixed bed reactor which comprises a reactor body, connecting flanges are arranged at the upper end and the lower end of the reactor body, quick-opening type cover plates are connected to the connecting flanges, a liquid inlet spraying device is arranged on the quick-opening type cover plate at the upper end, and a liquid outlet spraying device is arranged on the quick-opening type cover plate at the lower end. A catalyst bearing assembly is arranged in the reactor main body and is used for realizing multi-layer distribution of a catalyst. The flow velocity of the reaction liquid is buffered and intercepted in a multi-layer manner through multi-layer arrangement of the catalyst layers and the filter layers, so that the stability of the flow velocity of the reaction liquid is effectively ensured.

The invention relates to a method for carbonylation esterification reaction of an immobilized Pd-catalyzed halogenated (hetero) aryl compound, CO and alcohols, organic alkali is used as an auxiliary agent and is applied to a micro-packed bed reaction system, the step of removing a catalyst in a Batch process after-treatment process using a homogeneous catalyst is avoided, the operation steps are simplified, the selectivity is high, the cost is low, and the method is suitable for industrial production. And the yield can reach 96% or above. Organic alkali needs to be added in the reaction to enrich the generated halogen anions, so that catalyst deactivation and equipment corrosion caused by the halogen anions are prevented; the micro-packed bed reaction system comprises a feeding system, a preheater, a micro-reactor, a gas-liquid separation device and a pressure reduction and back pressure system. The reaction system is a combination of continuous flow chemistry and a microreactor technology, the gas-liquid-solid three-phase interface contact area is increased by utilizing the advantages of a microchannel, multiphase mass transfer and heat transfer are greatly enhanced, the reaction time is remarkably shortened, the retention time distribution of the gas phase and the liquid phase is narrower, and side reactions can be reduced.

A method for producing acetone glyceryl methacrylate via transesterification involves adding methyl methacrylate and glyceryl acetone, a polymerization inhibitor tetramethylpiperidine nitroxide radical triphosphite, and a catalyst calcium acetylacetonate or zinc acetylacetonate, to an esterification reactor. The reactor is stirred and heated to 103℃-107℃ for 3-6 hours. Heating is then stopped. By controlling the reflux ratio of the reflux device at the top of the esterification reactor, the temperature inside the reactor is maintained at 121-131.5℃, and the temperature at the top of the distillation column is maintained at 92-96℃. After esterification, vacuum distillation is performed to obtain acetone glyceryl methacrylate. The advantages are: continuous reaction, simple operation, use of an organotin catalyst that does not contain heavy metal tin, and a final product yield of 94.5%-96% with a purity of over 97%, an acid value of 0.001 mg / g KOH, and a platinum-cobalt color of 5-20.

The application discloses a sampling device for water pollution detection and belongs to the technical field of sampling devices, which comprises a support frame, a first lifting plate is slidably arranged on the support frame, a support plate is fixedly connected to the first lifting plate, a reciprocating screw rod is rotatably connected to the support plate, a first sliding rod is threadedly connected to the reciprocating screw rod, a first fixed plate is fixedly connected to the first sliding rod, one end of the first fixed plate is fixedly connected to a first guide rod, the other end of the first fixed plate is fixedly connected to the outer side wall of a fixed ring, a sampling cylinder is fixedly installed in the fixed ring, and multiple groups of sampling cylinders can simultaneously perform sampling work at the same depth through cooperation of the first guide rod and the second guide rod, and multiple groups of sampling cylinders can simultaneously perform integral movement through cooperation of the reciprocating screw rod, so that the sampling cylinders can perform multiple-point sampling work in a sewage pool, and sampling efficiency and detection representativeness are improved.

The invention relates to a method for preparing N, N '-(carbonyl bis (4, 1-phenylene)) bis (3-nitrobenzamide) through a microchannel reaction, the N, N'-(carbonyl bis (4, 1-phenylene)) bis (3-nitrobenzamide) is prepared by using a continuous flow microchannel reactor and ethylene glycol butyl ether as a solvent, the reaction is more uniform, few by-products are produced, the yield is high, continuous reaction can be realized, and the method is suitable for industrial production. Meanwhile, a solvent adopted in the reaction can be recycled after reduced pressure distillation, and the solvent is marked as an environment-friendly solvent and has relatively good safety; the preparation method has the advantages of mild preparation conditions, low production cost, easiness in batch and large-scale production, strong universality, good industrial production basis and wide application prospect.

The invention relates to a method for preparing 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane by a microchannel reactor, which comprises the following steps: fully mixing and preheating 6FAP and ethylene glycol monobutyl ether to obtain a 6FAP solution, taking the 6FAP solution and a preheated acylating agent as two strands of materials, and enabling the 6FAP solution and the acylating agent to respectively enter the microchannel reactor for mixed reaction to obtain 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane. A product obtained by the reaction flows out from an outlet of the reactor; according to the present invention, the synthesis route process is simple and easy to operate. Compared with the existing route for synthesizing 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane, the method has the advantages of higher safety, fewer three wastes, higher environmental friendliness, lower production cost and higher yield, and is more suitable for industrial mass production.

This application discloses a piperazine pyrophosphate, its preparation method, and its application, belonging to the field of flame retardant technology. The preparation method of piperazine pyrophosphate in this application uses piperazine diphosphate as raw material and employs a multi-stage temperature-switching condensation reaction and a multi-stage cooling treatment to ensure complete condensation of piperazine diphosphate while avoiding side reactions. This significantly improves the synthesis efficiency, product purity, batch stability, thermal stability, and whiteness of piperazine pyrophosphate. The preparation method of piperazine pyrophosphate in this application enables continuous reaction, achieving 24-hour uninterrupted production, greatly shortening the production cycle of piperazine pyrophosphate, and reducing environmental pollution.

The invention discloses a dynamic tubular reaction system, and belongs to the technical field of reactors, the dynamic tubular reaction system comprises a plurality of tubular reactors which are connected end to end and are annularly arranged, and the tubular reactors are transversely arranged; and a gas outlet pipe with an upward opening is arranged at the connection position of the adjacent tubular reactors. According to the invention, the plurality of tubular reactors are annularly arranged end to end and are transversely arranged, the gas outlet pipes with upward openings can be arranged at the connection positions of the adjacent tubular reactors, and the arrangement of the plurality of gas outlet pipes increases the area of a gas-liquid interface, so that gas generated by reaction is conveniently discharged, and the influence of the gas on material flow is reduced; the continuous reaction is ensured, and the stable reaction is realized; meanwhile, a plurality of tubular reactors are connected end to end and are annularly arranged, so that the reaction path is increased through material circulation, and the product yield is improved.