10results about How to "Stable reaction temperature" patented technology

The invention provides a methyl phenyl chlorosilane continuous hydrolysis device for preparing a room temperature curing organic silicon resin coating. The methyl phenyl chlorosilane continuous hydrolysis device comprises a methyl phenyl chlorosilane feeding pipeline, a water agent feeding pipeline and a reaction mixing chamber, a plurality of perforated plates are sequentially distributed in the reaction mixing chamber from front to back at intervals, a plurality of hydrolysis holes are uniformly distributed in the perforated plates at intervals, and a cooling jacket for cooling an inner cavity of the reaction mixing chamber is arranged on the outer wall of the reaction mixing chamber. The device is reasonable in structural design, and a methyl phenyl chlorosilane solution and water are secondarily dispersed to form a plurality of small flows when passing through the porous plate, so that the methyl phenyl chlorosilane solution and the water are fully mixed in the next-stage chamber. Meanwhile, a cooling jacket 7 is designed on the chamber wall of the reaction mixing chamber, heat generated in the reaction can be effectively exchanged, and the reaction temperature is kept stable, so that the stability of a product is ensured, and the hydrolysis quality is favorably improved.

The invention discloses a teaching experiment device for dendrobium officinale flavone extraction and concentration, and the device comprises a separation column which is vertically fixed on the side surface of a supporting frame, and the separation column is internally provided with a reaction liquid; a plurality of groups of sampling wheels are vertically arranged on the side, away from the supporting frame, of the separation column, the axes of the sampling wheels are vertically arranged, a driving assembly is arranged on the axis sides of the sampling wheels, and sampling grooves are formed in the upper portions of the sampling wheels; according to the invention, the sampling wheels are vertically arranged on one side of the chromatographic column, and each sampling groove can accurately enter different depth areas of the chromatographic column, so that sampling is carried out in different time periods of the concentration process. According to the device, a closed concentration environment and an automatic sampling mechanism are adopted, the problem of potential safety hazards caused by frequent opening and closing of the device is avoided, meanwhile, the experiment operation difficulty is reduced, the device is particularly suitable for being used in teaching experiments, and the safety of students can be effectively protected.

The utility model belongs to the technical field of micro-channel reaction equipment, and particularly discloses a micro-channel reactor which comprises a cooling water pipe, a feeding pipe, a plurality of U-shaped pipes and a discharging pipe, the cooling water pipe is communicated with a plurality of water feeding pipes, each water feeding pipe is communicated with two water feeding branch pipes, the plurality of U-shaped pipes are sequentially communicated in an S shape, and the discharging pipe is communicated with the U-shaped pipes. Each water feeding branch pipe is communicated with the connecting position of the corresponding U-shaped pipe, each U-shaped pipe is composed of a jacketed pipe and an inner pipe, the jacketed pipes are connected to the inner pipes in a sleeved mode, the feeding pipe, the discharging pipe and the U-shaped pipes are all communicated with water return pipes, each water return pipe is provided with a water return thermometer and a water return valve, and the connecting position of each U-shaped pipe is provided with a water feeding thermometer. The micro-channel reactor can effectively improve the reaction uniformity, stabilize the pressure and improve the production safety, the design of the jacketed pipe can effectively reduce heat loss and maintain the heat balance of a reaction system, cooling water enters the multiple branch pipes synchronously, and the stability of the temperature and the pressure of the inner pipe can be maintained.

The utility model discloses a continuous production device for sulfolane, which comprises a butadiene metering tank, a sulfur dioxide metering tank, a synthesis mixing reaction kettle, a processing bracket, a reboiler, a mixing and stirring structure and a heat exchange structure, and relates to the technical field of sulfolane production. The raw materials are rapidly drained into the synthesis mixing reaction kettle, so that the kinetic energy of the raw materials is increased, and rapid dispersion and mixing of the raw materials in the reaction kettle are facilitated; through the design of the F-shaped stirring pipe and the arc-shaped stirring pipe and the lifting motion of the lifting extrusion concave block, liquid in the reaction kettle is directly stirred, rotating airflow is generated by introducing and draining air, raw materials are further driven to be mixed at a high speed, and the mixing uniformity is improved.

The utility model relates to the technical field of polycrystalline silicon production, in particular to a flow, temperature and pressure interlocking control system of an anti-disproportionation device. A feeding pipeline I and a feeding pipeline II are respectively communicated with a material inlet I of a heat exchanger; a flow measuring device I arranged on the feeding pipeline I is connected with a flow valve I; a flow measuring device II arranged on the feeding pipeline II is connected with a flow valve II; a material inlet of the anti-disproportionation device is communicated with a first material outlet of the heat exchanger; a second material inlet of the heat exchanger is communicated with a material outlet of the anti-disproportionation device through a communication pipeline; a total flux valve and a flux valve are arranged on the communicating pipeline; a second material outlet of the heat exchanger is connected with a second material output pipeline; the communicating pipeline is communicated with a material II output pipeline through a bypass pipeline; and a bypass valve is arranged on the bypass pipeline. By adopting the anti-disproportionation device disclosed by the utility model, the self-regulation of the feeding flow of the anti-disproportionation device can be realized, the reaction temperature and pressure are kept stable, and the reaction efficiency and quality are improved; energy is saved, consumption is reduced, and potential safety hazards are reduced.

The utility model provides a safe and environment-friendly nitration reaction system which comprises a micro-channel reactor, a dynamic tubular reactor, a first phase splitter, a nitric acid concentration unit, a circulating pump, a temperature sensor and an overtemperature safety interlocking system, a nitric acid outlet of the nitric acid concentration unit is communicated with a nitric acid inlet of the micro-channel reactor and a nitric acid inlet of the dynamic tubular reactor, the temperature sensor is arranged at the nitric acid inlet of the micro-channel reactor and the nitric acid inlet of the dynamic tubular reactor, and the overtemperature safety interlocking system is connected with the temperature sensor. According to the reaction system provided by the utility model, the temperature sensor and the overtemperature safety interlocking system are arranged, so that continuous and stable production is ensured, and the safety of automation and production is improved. And by arranging the first phase splitter and the nitric acid concentration unit, the generation of waste salt is reduced, and the environmental pollution is small.

The invention relates to the technical field of ammonium nitrate production, and particularly provides an ammonium nitrate solution production method, which comprises: 1, sequentially passing a dilute nitric acid solution through a dechlorination tower, a bleaching tower and a nitric acid filter to obtain a finished product dilute nitric acid solution; 2, carrying out a neutralization reaction on ammonia gas and a dilute nitric acid solution; 3, the ammonium nitrate solution enters an evaporator to be concentrated, and alkaline steam is divided into two parts; step 4, condensing and recovering the part I, providing a heat source for the evaporator by the part II, and then mixing the part II with steam for separation; 5, after the steam and the ammonia gas are separated, the ammonia gas is recycled, and the steam enters an adsorption device after being condensed; step 6, the condensate is divided into desalted water and concentrated water by the adsorption device, and the concentrated water is introduced into the neutralization reactor as cooling water; 7, ammonium nitrate enters an intermediate tank after being concentrated, and a high-quality ammonium nitrate solution is obtained; the ammonium nitrate solution produced by the method is high in quality, stable in property and high in safety coefficient in the production, transportation and use processes.

This invention discloses a reactor for water-gas shift reaction and its application. The reactor is suitable for water-gas shift reaction processes containing gaseous and liquid reactants. A reaction chamber is set inside a hollow, sealed cylinder formed by the reactor walls. The reaction chamber is a hollow, sealed chamber surrounded by porous material as its wall surface. A gaseous reactant inlet pipe penetrates the reactor wall and extends into the upper part of the reaction chamber, a liquid reactant inlet pipe penetrates the reactor wall and extends into the cylinder, and a reaction product outlet pipe penetrates the reactor wall and extends into the lower part of the reaction chamber. The catalyst for the water-gas shift reaction is packed in the reaction chamber. The water-gas shift reaction can be carried out under near-isothermal conditions. Water in the liquid reactant does not need to be pre-vaporized and is directly fed into the reactor in liquid form, saving the energy consumption required to transport the corresponding amount of water vapor. Simultaneously, a high molar ratio of water to carbon monoxide is maintained within the reactor, promoting complete conversion of carbon monoxide.

The invention provides a synthesis method and a synthesis device of cyclic carbonate. The synthesis device comprises a first reactor, an external circulation cooler, a circulation pump and a second reactor, and the first reactor and / or the second reactor are / is filled with a heterogeneous catalyst with the height larger than or equal to 2 m. According to the synthesis method, a reactor with a large height-diameter ratio is selected, the reactor is filled with a heterogeneous catalyst with the height larger than or equal to 2 m, and the temperature in the reactor is controlled to be stabilized in a low range, so that the concentration of the catalyst in a reaction product and the chromaticity of the product are reduced; the purity of the cyclic carbonate in the reaction product and the quality of the product are improved. When the synthesis device and / or the synthesis method are / is applied to synthesis of cyclic carbonate, a product containing cyclic carbonate with high purity and low chroma can be obtained, and the method is simple and convenient to operate and has industrial application prospects.

The invention provides a method for synthesizing lemon yellow through micro-channel continuous flow, and belongs to the technical field of food pigment synthesis. The method for synthesizing lemon yellow by taking sodium sulfanilate, sodium nitrite, a hydrochloric acid solution, dimethyl acetylsuccinate and a sodium carbonate solution as raw materials is carried out in a plurality of micro-reactors and micro-mixers according to different reaction types, so that full-continuous reaction of diazotization, condensation and coupling is realized; the method has the advantages of simple operation, short reaction time, few byproducts, high product purity and overall yield, and greatly improved production safety and stability.