16results about How to "Avoid flying temperature" patented technology

The invention provides a synthetic method of hexafluoropropylene oxide and application thereof, and relates to the technical field of fluorine chemical industry, and the synthetic method comprises the following steps: under supercritical conditions, hexafluoropropylene and oxygen are subjected to complete mixed flow induction to generate reaction free radicals, then the reaction free radicals are subjected to a reaction through a microchannel reactor, and the hexafluoropropylene oxide is continuously synthesized. The invention solves the technical problems of low conversion rate, low selectivity and rearrangement of hexafluoropropylene oxide into hexafluoroacetone during synthesis of hexafluoropropylene oxide in the prior art, and achieves the technical effects of high conversion rate, high selectivity and green continuous synthesis of hexafluoropropylene oxide.

The invention belongs to the field of industrial waste gas purification, and particularly relates to a purification method for resource utilization of industrial waste gas. Comprising the following steps: (1) carrying out dust removal and purification pretreatment on the industrial waste gas containing NH3 and high CO + CO2; (2) entering an industrial waste gas purification catalyst bed layer at 230-400 DEG C for purification treatment; and (3) the industrial waste gas enters a dechlorinating agent bed layer for removing inorganic chlorine under the same temperature condition for purification treatment, the industrial waste gas purification catalyst comprises an A-type molecular sieve and MoO3 / WO3, NiO / CoO and V2O5 / CeO2 loaded on the A-type molecular sieve, the content of molybdenum or tungsten is 3-12 wt% in terms of MoO3 or WO3, the content of nickel or cobalt is 3-7 wt% in terms of NiO or CoO, the content of vanadium or cerium is 0.5-1.5 wt% in terms of V2O5 or CeO2, the content of vanadium or cerium is 0.5-1.5 wt% in terms of V2O5 or CeO2, and the content of vanadium or cerium is 0.5-1.5 wt% in terms of V2O5 or CeO2. And the molecular sieve also contains 55-75% of alkali metal or alkaline earth metal which is not subjected to ion exchange. The catalyst can be used for purifying oxygen, olefin, HCN, complex sulfides and organic chlorine in an ammonia-containing and high CO + CO2 gas source, and the target purification effect is achieved.

The invention relates to the technical field of propylene dimerization, in particular to a method and device for preparing 4-methyl-1-pentene through propylene dimerization, and the method comprises the following steps: pretreating a raw material containing propylene, a diluent and a coking inhibitor, and carrying out dimerization reaction on the obtained pretreated raw material and a catalyst in a non-oxidizing atmosphere to obtain 4-methyl-1-pentene, and carrying out rectification separation on the obtained reaction material to obtain the 4-methyl-1-pentene. According to the method provided by the invention, the selectivity of 4M1P is effectively improved, and the catalytic activity and the one-way service life of the catalyst are improved.

The invention belongs to the field of industrial gas purification, and particularly relates to an industrial gas purification method. Comprising the following steps: industrial gas containing NH3 and high CO + CO2 enters an industrial gas purification catalyst bed layer at 230-450 DEG C for purification treatment; the industrial gas enters the same industrial gas purification catalyst bed layer for purification treatment at the temperature of 80-200 DEG C, the industrial gas purification catalyst comprises an A-type molecular sieve and MoO3 / WO3 and NiO / CoO loaded on the A-type molecular sieve, the content of molybdenum or tungsten is 3-12 wt% in terms of MoO3 or WO3, the content of nickel or cobalt is 3-7 wt% in terms of NiO or CoO, and the content of cobalt is 3-7 wt% in terms of NiO or CoO. And the molecular sieve also contains 55-75% of alkali metal or alkaline earth metal which is not subjected to ion exchange according to the molar ratio. The device can be used for purifying industrial gas containing ammonia and high CO + CO2, and the target purification effect is achieved.

This invention belongs to the field of high-temperature heat pipe performance testing technology, specifically relating to a fully autonomous adaptive heat pipe heat transfer performance testing method. It includes the following steps: Step S1: Generating a heat flux density benchmark based on geometric features; Step S2: Using P... base Based on this, differentiated power loading is performed using a stage-dependent loading coefficient β. During step S2, steps S3 to S5 are executed in parallel: Step S3: Parallel execution of adaptive physical stage switching based on a dual criterion of "temperature-anomaly"; Step S4: Parallel execution of autonomous steady-state determination for each power loading at key temperature points in the linear heat transfer stage and during each power loading in the limit approximation stage; Step S5: Parallel execution of full-cycle automated safety protection based on monitoring the second derivative of the evaporation section temperature. The beneficial effects are: improved adaptability of the testing method, compatible with heat pipes of different geometric dimensions; and effective improvement of testing efficiency through the implementation of a staged control strategy.

The application discloses a process method for preparing ethyl acetoacetate by crude ester circulation cooling, and belongs to the technical field of chemical industry. The method can dilute the heat generated in the reaction in time and effectively by performing crude ester circulation in the continuous reaction process, better solves the problem of heat accumulation in the reactor, and cannot dissipate heat in time, thereby causing the problem of rapid temperature rise, and avoids the "flying temperature" in the reaction process; the temperature in the reactor is stable without other complex and strict operation control, the operation is simple and feasible; the content of the crude product, the product quality and the yield are improved; the content of the crude methyl acetoacetate obtained by the method is 97.8-98.1%, the content of the finished product after rectification is 99.5-99.7%, and the product yield is 97.8-98.2%; the high-temperature resistance requirement of the pipeline equipment is reduced, and the safety hidden danger is reduced.

The application discloses a calcium carbide furnace tail gas deep purification process. The calcium carbide furnace tail gas is firstly subjected to wet desulfurization and dehydrocyanation and TSA treatment, and then sequentially enters a de-fluorine and de-hydrocyanation reactor, a hydrolysis desulfurization reactor, a fine desulfurization reactor, a de-phosphorus and de-arsenic reactor, a de-oxygen reactor and a de-hydrocarbon reactor. After the treatment process, the HCl content in the gas is less than 0.1 ppm, the HF content is less than 0.1 ppm, the HCN content is less than 0.1 ppm, the total sulfur content is less than 0.1 ppm, the AsH3 content is less than 5 ppb, the PH3 content is less than 5 ppb, the oxygen content is less than 10 ppm, and the unsaturated hydrocarbon content is less than 0.1 ppm, thereby meeting the separation and purification requirements of subsequent processes, and the pressure drop of the whole process is not more than 100 kPa. The process can remove oxygen and unsaturated hydrocarbons in the gas under low-temperature conditions, thereby reducing the occurrence of side reactions, and has the characteristics of reasonable process design, high purification precision, low energy consumption and low operation cost.

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 embodiment of the invention provides an advanced control system and method for a C2 front hydrogenation reactor, and the system comprises an APC server, an OPC server, a DCS server, the C2 front hydrogenation reactor, and the APC server, and is used for setting preset control parameters, receiving real-time parameters uploaded by the OPC server, comparing the preset control parameters with the real-time parameters, determining corresponding optimization values, and outputting the optimization values. The optimization value is sent to the DCS server through the OPC server; the OPC server is used for receiving real-time parameters collected in the C2 front hydrogenation process, sending the real-time parameters to the APC server and sending the received optimization value to the DCS server; the DCS server is used for receiving the optimization value, converting the optimization value into a corresponding parameter control instruction and sending the parameter control instruction to the C2 hydrogenation reactor; and the C2 hydrogenation reactor is used for uploading real-time parameters acquired in a C2 pre-hydrogenation process to the DCS server and completing corresponding parameter adjustment based on the parameter control instruction.

The invention belongs to the field of catalysts, and relates to a purification catalyst for industrial waste gas resource utilization and preparation and application thereof. The purification catalyst comprises an A-type molecular sieve and MoO3 / WO3, NiO / CoO and V2O5 / CeO2 loaded on the A-type molecular sieve, in terms of MoO3 or WO3, the content of molybdenum or tungsten is 3-12 wt%, in terms of NiO or CoO, the content of nickel or cobalt is 3-7 wt%, in terms of V2O5 or CeO2, the content of vanadium or cerium is 0.5-1.5 wt%, the molecular sieve further contains 55-75% of alkali metal or alkaline earth metal which is not subjected to ion exchange, and the alkali metal or alkaline earth metal is sodium, potassium and calcium. The catalyst can be used for purifying oxygen, olefin, HCN, complex sulfides and organic chlorine in an ammonia-containing and high CO + CO2 gas source, and the target purification effect is achieved.

The invention provides a method for preparing a perfluoropolyether surfactant by a microchannel method, and relates to the field of preparation of fluorine fine chemicals. The method comprises the following steps: in the presence of a fluorocarbon solvent, perfluoropropylene and oxygen are subjected to a liquid-phase oxidation reaction, and an oxidized crude product is obtained; carrying out rectification separation on the oxidized crude product to obtain perfluoropolyether; continuously hydrolyzing the perfluoropolyether and pure water in a micro-channel reaction device to obtain a hydrolysate; and sequentially carrying out gas-liquid separation and liquid phase layering on the hydrolysate to obtain the perfluoropolyether carboxylic acid, and mixing the perfluoropolyether carboxylic acid with alkali liquor, and carrying out neutralization reaction to obtain the perfluoropolyether surfactant. The perfluoropolyether surfactant is prepared from the perfluoropropylene oxidation product perfluoropolyether by adopting a microchannel reactor continuous method, and the method has the advantages of efficient mass and heat transfer, avoidance of temperature runaway, stable reaction, safety, reliability, easiness in industrial amplification and the like.

The invention provides a direct coal liquefaction system and a direct coal liquefaction method. The direct coal liquefaction system comprises a coal-oil slurry preparation unit, a preheating mixing unit, a first direct coal liquefaction reactor, a second direct coal liquefaction reactor, a third direct coal liquefaction reactor, a first separation unit, a distillation tower, a hydrogenation unit, a second separation unit and a hydrogen supply unit, the technical problems of coal powder deposition, mineral substance deposition, low utilization rate, poor operation stability, solid particle powder entrainment and the like of the reactor in the existing direct coal liquefaction technology are solved, and the bottleneck problem restricting further amplification of the reactor is solved, so that long-period efficient operation of the direct coal liquefaction device is realized; the utilization rate and the single-series scale of the direct coal liquefaction reactor are improved, the energy utilization efficiency is improved, and energy conservation and carbon reduction are facilitated.

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.

The invention belongs to the field of catalysts and relates to an industrial gas purification catalyst as well as preparation and application thereof. The industrial gas purification catalyst comprises an A-type molecular sieve and MoO3 / WO3 and NiO / CoO loaded on the A-type molecular sieve, in terms of MoO3 or WO3, the content of molybdenum or tungsten is 3-12wt%, in terms of NiO or CoO, the content of nickel or cobalt is 3-7wt%, the molecular sieve also contains 55-75% of alkali metal or alkaline earth metal which is not exchanged by ion according to a molar ratio, and the alkali metal or alkaline earth metal is sodium, potassium and calcium. The catalyst can be used for purifying oxygen, olefin, HCN, thiophene, disulfide, mercaptan, thioether, CS2 and other complex sulfides and / or COS in an ammonia-containing and high CO + CO2 gas source, and the target purification effect is achieved.

The invention provides a reaction method and a reaction device for preparing ethylene by oxidative dehydrogenation of ethane, which are characterized in that oxygen is respectively mixed with reaction raw material gas and reaction gas in a segmented oxygen injection mode to prepare ethylene; the device comprises a reaction system and a mixer, the reaction system comprises at least two ethane oxidative dehydrogenation reactors which are connected in series or an ethane oxidative dehydrogenation reactor with at least two stages of reaction sections which are connected in series. According to the invention, by adopting a process technology of mixing the low-temperature oxygen-containing gas with the reaction raw material gas in multiple sections, the concentration of oxygen in each reactor is effectively controlled, the process operation point of the reaction gas in each reactor is ensured to be in a reaction safety operation area, the safety controllability of the reaction device is improved, and the production cost is reduced. High-temperature reaction gas between the reaction sections is subjected to cold shock, so that the temperature of the reaction gas between the sections can be reduced, the reaction temperature control in the whole reaction process is effectively realized, the reaction temperature gradient distribution in the whole reaction device is optimized, and the reaction device is ensured to react at the optimal operation temperature; and the phenomena of temperature runaway of the reactor and deactivation of the catalyst are avoided.