514 results about "Cracking reaction" patented technology

The invention discloses a photovoltaic-driven IDC electric-cooling linkage method and device, and belongs to the technical field of IDC electric-cooling linkage, and the method comprises the following steps: S1, constructing a gravity energy storage structure; s2, the gravity object is lifted to the highest point of the gravity object channel through the gravity energy storage structure; s3, air at the bottom of the gravity object channel is compressed for the second time, and a thermal cracking reaction is carried out; s4, thermal cracking gas generated by the thermal cracking reaction is drained, and combustion products are discharged into a gas storage chamber; s5, the generated steam waste heat pushes a turbine in a turbine chamber to do work for power generation; and S6, domestic hot water and night heating hot water are prepared, convective heat exchange is conducted, the low-temperature reclaimed water obtained after heat exchange is heated into high-temperature steam in a cooler, the high-temperature steam enters a turbine to become high-temperature reclaimed water, and the high-temperature reclaimed water flows into a control center or a water storage pool. The organic matter compressed garbage is used as a gravity object for gravity energy storage, and heavy oil, solid fuel, adsorbents and other high-value products are produced in the gravity energy storage process.

The invention provides an oil shale supercritical CO2 fracturing and in-situ conversion integrated device and a working method, belongs to the technical field of oil shale exploitation, and realizes efficient cooperation of supercritical CO2 fracturing and in-situ conversion by integrating a CO2 liquefaction storage system, a fracturing heating system, a stratum simulation system and a data monitoring system. The device comprises a CO2 liquefying and storing system, a CO2 liquefying and storing system, a CO2 liquid storage system, a CO2 liquid storage system and a CO2 liquid storage system, the oil shale fracturing and heating system is used for fracturing the rock core under the simulated formation confining pressure condition and triggering the oil shale in-situ cracking reaction through medium-frequency heating; the oil shale fracturing model is used for simulating an underground fracturing environment and guiding crack propagation; the data monitoring system collects temperature and pressure parameters in real time to optimize process regulation and control. The fracturing process and the conversion process are innovatively coupled, the supercritical CO2 has the characteristics of a fracturing medium, a heat transfer carrier and a reaction medium, the energy utilization rate and the CO2 circulation efficiency are remarkably improved, and the oil shale recovery rate is increased.

The invention relates to the technical field of methanol cracking hydrogen production, in particular to a process and a system for methanol cracking hydrogen production. Raw material methanol liquid is conveyed to a heat exchanger from a methanol storage tank through a metering pump and is heated and preheated through heat exchange of the heat exchanger, and the preheated raw material methanol liquid is conveyed into a methanol vaporizer to be vaporized into methanol steam; methanol steam enters a reactor and is catalyzed by a catalyst, a cracking reaction is carried out, high-temperature converted gas of hydrogen and carbon monoxide is generated, the high-temperature converted gas is conveyed to a product end after being subjected to heat exchange and cooling by a heat exchanger, the high-temperature converted gas is used as a heat source to exchange heat with fed methanol, and the converted gas is cooled while the methanol is preheated, so that energy complementation is realized; and the process ensures that methanol is fully vaporized, the temperature of the reactor is controlled at the optimal temperature for direct methanol cracking, and the direct methanol cracking reaction is sufficient and less in side reaction under the catalysis of a copper-based catalyst with high activity and good selectivity.

The invention discloses an intelligent catalytic thermal cracking reaction system and method for complex mixed waste plastics, and belongs to the technical field of waste plastic resourceful treatment. The system comprises a feeding device, a high-pressure multi-section cracking reaction kettle, a spraying type heat exchange temperature control system, a heating system, a sensing and analyzing unit, an intelligent control system and a product condensation separation and utilization unit, the method specifically comprises the following steps: (1) pretreating and feeding raw materials; (2) multi-section temperature control cracking reaction; (3) intelligent feedback control; (4) the catalyst has a synergistic effect; and (5) product separation and recovery. According to the invention, a unique spraying type high-pressure multi-section temperature control system is combined with intelligent control of a rate matching algorithm, so that efficient, directional and stable cracking of complex mixed waste plastics is realized, the yield of high-value products such as light olefins, aromatic hydrocarbons and the like is remarkably improved, byproduct residues and energy consumption are reduced, and long-term continuous operation is realized.

Hybrid catalysts for simultaneous dehalogenation and cracking of plastic derived oil include composite particles, where each of the composite particles includes red mud particles and Mordenite zeolite particles. A process includes contacting a plastic derived oil stream with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil stream comprises halogen-containing compounds, and contacting the plastic derived oil stream with the hybrid catalyst causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, where the hydrogen halides are adsorbed onto surfaces of the red mud particles. The FCC effluent has a concentration of the halogen-containing compounds less than the plastic derived oil stream. Contacting the plastic derived oil stream with the hybrid catalyst causes hydrocarbons in the plastic derived oil stream to undergo cracking reactions over the Mordenite zeolite particles to produce the FCC effluent.

The invention discloses a method for preparing low-grafted glucosyl stevioside at high temperature and high pressure, which comprises the following steps: taking stevioside as a receptor, beta-cyclodextrin as a donor and CGT enzyme as a catalyst for reaction to obtain reaction liquid containing glucosyl stevioside; putting the reaction liquid containing the glucosyl stevioside into a high-pressure reaction kettle, and adding a catalyst to carry out high-temperature and high-pressure cracking reaction; after the high-temperature and high-pressure cracking reaction is finished, cooling a cracking solution to room temperature, filtering, concentrating for multiple times by adopting a polymeric membrane, and collecting a trapped fluid; and carrying out spray drying on the trapped fluid to obtain the low-grafting glucosyl stevioside. According to the method, firstly, glucosyl stevioside is prepared by adopting an enzyme modification method, then splitting decomposition is performed under certain conditions, and then a specific purification process is performed, so that the prepared product is high in stability, the proportion of low-grafted glucosyl stevioside in the product is high, and the product tastes good.

The invention relates to the technical field of high-temperature industrial equipment manufacturing, and discloses a carbon black reaction furnace based on temperature control and an optimized production preparation process, the carbon black reaction furnace comprises the steps of raw material pretreatment, multi-temperature zone cracking reaction, quenching termination reaction, carbon black collection and tail gas cyclic utilization, and by designing a multi-temperature zone cooperative temperature control mechanism and combining a dynamic temperature compensation technology, the carbon black reaction furnace is optimized. The uniformity and the stability of thermal field distribution in the reaction furnace are improved, the problem of non-uniform reaction caused by temperature gradient of a traditional device is solved, the nucleation and growth process of the carbon black is carried out in a highly controllable thermal environment, and a guarantee is provided for obtaining products with highly uniform particle sizes; on-line monitoring and closed-loop feedback control are constructed, real-time sensing and intelligent regulation and control of key process parameters are achieved, fluctuation in the production process is inhibited in time, it is guaranteed that reaction conditions are always in the optimal interval, and therefore the consistency of product quality and the reliability of process operation are improved.

A hybrid catalyst for simultaneous dehalogenation and cracking of plastic derived oil includes a plurality of composite particles, where each of the composite particles includes red mud particles and USY zeolite particles. A process for upgrading plastic derived oil includes contacting the plastic derived oil with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil comprises halogen-containing compounds, and the contacting at reaction conditions causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, which are adsorbed onto surfaces of the red mud particles. The contacting at reaction conditions also causes hydrocarbons in the plastic derived oil to undergo cracking reactions to produce the FCC effluent. The FCC effluent may have a reduced concentration of the halogen-containing compounds. A system that includes the hybrid catalyst is also disclosed.

The application discloses a modified ZSM-5 molecular sieve catalyst and a preparation method and application thereof. The preparation method of the modified ZSM-5 molecular sieve catalyst comprises the following steps: mixing ZSM-5 molecular sieve with a solvent to obtain a liquid-solid mixture; adding a modification precursor solution into the obtained liquid-solid mixture to perform a modification reaction, so as to obtain a modified liquid-solid mixture; performing drying and calcination on the modified liquid-solid mixture to obtain a catalyst precursor; and repeating the modification process for 2 to 10 times to obtain the modified ZSM-5 molecular sieve catalyst. According to the application, the surface diffusion performance of the molecular sieve is improved by regulating the properties of the surface hydroxyl and defects of the ZSM-5 molecular sieve, and the application of the molecular sieve in an olefin catalytic cracking reaction for preparing ethylene and propylene can improve the catalytic efficiency, the reaction life and the selectivity of the target product.

The present application belongs to the technical field of acetylene preparation, and discloses a method and system for efficiently preparing acetylene and hydrogen from natural gas based on turbine cracking. The method comprises the following steps: obtaining 95%-100% purified methane gas through raw material pretreatment, preheating to 523-823 K, and then feeding into a turbine cracking reaction unit to be heated to 1800-2200 K within 1-10 ms and cracked for 1-10 ms; the cracked gas is quenched to below 800 K within 0.5-3 ms and the waste heat is recovered; finally, carbon black, high-purity acetylene and hydrogen are obtained through gas-solid and gas separation. The system comprises raw material pretreatment, preheating, turbine cracking reaction, quenching and waste heat recovery, gas-solid separation, gas separation units, and a matching monitoring and collaborative control module, and realizes multi-parameter collaborative control and online carbon cleaning. The present application does not introduce oxygen, the conversion rate of natural gas is 92%-95%, the acetylene yield is 83%-87.5%, the energy consumption is low, the products are easy to separate, it is green and environmentally friendly, and it is suitable for industrial continuous production.

This invention relates to the field of catalytic cracking catalyst preparation, and discloses a catalytic cracking catalyst, its preparation method, and its application. The catalytic cracking catalyst comprises a molecular sieve, a binder, and clay; based on the total mass of the catalyst, the mass content of the molecular sieve is 60-85%, the mass content of the clay is 5-20%, and the mass content of the binder is 10-35%; the mesopore size of the catalyst is 3-50 nm; in the catalyst, the volume of mesopores with a pore size of 6-10 nm accounts for 8-30% of the total mesopore volume; in the catalyst, the volume of mesopores with a pore size of 30-35 nm accounts for 10-30% of the total mesopore volume. This catalyst exhibits excellent catalytic performance and, when applied to catalytic cracking reactions, especially naphtha catalytic cracking reactions, demonstrates high conversion rates and low-carbon olefin yields.

This invention discloses a method and system for the comprehensive utilization of catalytic oil slurry. The method first involves hydrogenating the catalytic oil slurry. The separated hydrogenated tail oil then undergoes a cracking reaction. The cracking products are treated with an extractant. After separation, the extract phase is processed by recovering the extractant to obtain aromatic oil. The heavy fraction obtained from the separation of the aromatic oil enters a coking reaction zone, where it reacts to yield oil gas and needle coke products. A comprehensive utilization system for catalytic oil slurry using the above method is also provided. The method and system of this invention can improve the mechanical strength of the obtained needle coke, effectively improve the microstructure of the needle coke, and obtain high-quality needle coke.

The invention provides a combined process method for improving the yield of vacuum residue catalytic cracking products, which comprises the following steps: determining the asphaltene dispersion coefficient d of vacuum residue according to a formula (1), where w asphaltene, w colloid and w aromatics respectively represent the mass fractions of asphaltene, colloid and aromatics in vacuum residue; and carrying out modification and catalytic cracking reaction on the vacuum residue. According to the combined process method, the asphaltene dispersion coefficient d is ingeniously designed, and d is smaller than or equal to 0.5 and dgt; the vacuum residue of which the content is 0.5 is modified by adopting different modification methods, and then catalytic cracking reaction is performed under different conditions, so that the density of a catalyst in a reactor is improved, oil-agent contact in the reactor is improved, the contact instantaneous effective agent-oil ratio can be improved, the catalytic cracking reaction ratio can be remarkably improved, thermal cracking and condensation coke generation reactions are reduced, and the catalytic cracking efficiency is improved. Conversion of inferior heavy oil is promoted, meanwhile, the coke yield is remarkably reduced, and the yield of high-value products is increased.

The utility model discloses polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer relates to chemical industry technical field. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, including reactor main part, catalyst stacking unit, liquid distributor main part and gas distribution unit. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, gas catalyst passes into the exhaust pipe through the communication groove, and then gas catalyst is evenly sprayed into the catalytic filler of loading net cylinder through the spray head, and the liquid raw material is evenly flowed through the catalytic filler of loading net cylinder through the liquid distribution port, so that the gas and solid catalyst are mixed in the loading net cylinder, the reaction rate is improved, and the uniformity of mixing is ensured, the mixing effect of liquid raw material and gas is improved, and the reaction and product generation are accelerated.

The invention discloses an ammonia gas catalytic cracker. The cracker comprises a shell and a corrugated coil pipe in the shell, a separation blind plate is arranged in the shell and is parallel to the bottom surface, and the internal space is divided into an upper half area and a lower half area; the corrugated coil pipe repeatedly penetrates through the separation blind plate; the pipe section, located above the separation blind plate, of the corrugated coil pipe is filled with an ammonia catalytic cracking catalyst, and the pipe section, located below the separation blind plate, of the corrugated coil pipe is not filled; an air inlet and an air outlet are formed in the two sides of the upper half area of the shell respectively, and a flue gas inlet and a flue gas outlet are formed in the two sides of the lower half area of the shell respectively; wherein the air inlet and the flue gas outlet are on the same side, and the air outlet and the flue gas inlet are on the same side; an inlet of the corrugated coil is connected with an ammonia pipeline, and an outlet is connected with a cracking gas pipeline. Part of ammonia gas is pre-cracked by utilizing the ammonia gas cracking catalyst, and heat is provided for cracking reaction in the corrugated coil pipe by utilizing flue gas waste heat, so that the adjustment of the combustion property of fuel gas is realized, and the possibility is provided for reducing fuel type NOx.

The utility model belongs to the technical field of methyl tert-butyl ether cracking, and particularly relates to a device for producing isobutene by cracking methyl tert-butyl ether. The device for producing isobutene by cracking methyl tert-butyl ether comprises an MTBE refining tower, the MTBE refining tower is connected with a cracking reactor, the bottom of the cracking reactor is sequentially connected with a condensate water cooler and a circulating water cooler, the circulating water cooler is connected with an absorption cooling tower, the absorption cooling tower is connected with a compressor inlet buffer tank, and the compressor inlet buffer tank is connected with a compressor outlet buffer tank. The compressor inlet buffer tank is connected with the gas production compressor; and the gas production compressor is connected with the isobutene water washing tower. According to the device for producing isobutene by cracking methyl tert-butyl ether, the condensate water cooler and the circulating water cooler are arranged and are matched with the light component removal tower reboiler, so that the cyclic utilization of heat is realized, and the energy consumption of the device is reduced; meanwhile, the isobutene water washing tower and the methanol water collecting tank are arranged, so that the loss of methanol is reduced, and the purity of an isobutene product is improved.

The invention discloses a system for hydrogen production and carbon production through methane cracking synergistically enhanced by plasma. The system comprises a gas source, a cracking reaction bin and a plasma torch, a double-layer stainless steel sleeve catalytic carrier is arranged in the cracking reaction bin, the double-layer stainless steel sleeve catalytic carrier comprises an inner-layer sleeve and an outer-layer sleeve, through holes with the aperture of 5-10 microns are distributed in the inner-layer sleeve, and through holes with the aperture of 20-50 microns are distributed in the outer-layer sleeve; the inner wall of the inner-layer sleeve is coated with a catalytic coating; the gas source provides and conveys methane gas into the cracking reaction bin; and the direct-current plasma torch conveys high-temperature plasma into the double-layer stainless steel sleeve catalytic carrier. A double-layer porous stainless steel sleeve is constructed in a plasma reaction cracking bin to serve as a catalytic carrier to load a catalytic coating, and a deep coupling structure of plasma cracking and catalytic cracking is constructed; and efficient conversion of methane and synchronous preparation of a high-added-value carbon material and high-purity hydrogen energy are realized.

The invention provides a catalyst heat exchange and replacement device, a catalytic cracking reaction system and a catalytic cracking method. The method provided by the invention solves the technical problems of large catalyst storage amount and long replacement period of a large catalytic device and further improvement of the flexible adjustment range of the catalytic cracking reaction, realizes flexible switching among different product schemes such as maximum production of chemical materials, consideration of the chemical materials and oil products, maximum production of the oil products and the like, and has a wide application prospect. The method is a novel catalytic cracking technology with flexibly adjustable product structure.

The present application relates to the production field of organic chemical raw material cyclohexene, and discloses a production method of cyclohexene.The method comprises the following steps: carrying out cracking reaction on cyclohexylbenzene and / or dicyclohexylbenzene raw material and a solid acid catalyst to obtain cyclohexene and benzene; and the solid acid catalyst is selected from at least one of amorphous silicon aluminum, molecular sieve and solid supported inorganic acid.The method has the advantages of high raw material conversion rate, high cyclohexene yield and no by-product cyclohexane, etc.

Described herein are methods for converting butene. In some embodiments, butene is converted to an ethylene-containing products. In additional embodiments, butene is converted to an propylene-containing products. In additional embodiments, butene is selectively converted to an ethylene-containing product and a propylene-containing product. These methods generally include metathesis and cracking reactions, as described.

The invention discloses a method for directionally preparing high-purity azelaic acid from oleic acid based on a micro-channel reactor, which comprises the following steps: mixing oleic acid and hydrogen peroxide dissolved with a catalyst, and feeding the mixture into the micro-channel reactor for oxidative cracking reaction to obtain oxidation liquid mainly containing the azelaic acid and the oleic acid; standing and layering the oxidation liquid to obtain a water phase A and an oil phase A; hot water is introduced into the oil phase A containing the nonanoic acid and the azelaic acid for extraction and liquid separation, and a water phase B and an oil phase B are obtained; fractionating the oil phase B to obtain high-purity nonanoic acid; cooling and crystallizing the water phase B to obtain a crude azelaic acid product, and melting and evaporating the crude product to remove moisture to obtain high-purity azelaic acid. Based on the microchannel reactor, hydrogen peroxide is used as an oxidizing agent, oleic acid double bonds can be directionally oxidized through a catalyst system, oleic acid is directly oxidized and cracked into nonanoic acid and azelaic acid in a short time, the reaction efficiency can be greatly improved, the reaction time can be shortened, and the use of a solvent and a phase transfer catalyst is avoided; the method has the advantages of high selectivity, high safety and remarkable environmental protection.

This invention provides temperature-responsive fluorescent nanomaterials, their preparation methods, and applications. The temperature-responsive fluorescent nanomaterials are nanoparticles formed from the compound TPE-CSO in an aqueous phase. The TPE-CSO compound comprises hydrophobic dinuclear fluorescent groups tetraphenylethylene (TPE) and cyanostyl styrene (CS) as the parent core, and temperature-responsive oligoethylene glycol (OEG) linked by benzyloxy groups as the hydrophilic chain. Furthermore, this invention also provides a temperature-responsive continuous light-harvesting system. This system constructs a reversible temperature-responsive light-harvesting system by loading the temperature-responsive fluorescent nanomaterials with hydrophobic dyes Rh6G and SR101, utilizing fluorescence resonance energy transfer. This system, as a catalyst for photocatalytic oxidative cracking reactions, exhibits a catalytic efficiency of 97%. This technology has great potential in preparing tunable luminescent catalytic materials and simulating the influence of temperature on photosynthesis, demonstrating broad application prospects.

The application relates to a continuous reaction system and method for establishing molten salt thermal cracking, and relates to the technical field of molten salt thermal cracking reaction. The application comprises a sealed molten salt reaction system, a suspension type orbiting conveying system, a movable reaction frame group, an oil gas condensation and recovery system, an RTO waste gas treatment system, an absorption type ice water supply system, a molten salt storage and supplementary supply system and a nitrogen generation and supplementary supply system. The orbit of the suspension type orbiting conveying system is arranged in the front and rear water seal tanks of the sealed molten salt reaction system, the gas entrained by the reactants and the thermal cracking reaction products is left in the original space, the front and rear water seal tanks form a free moving gate, the reactants and the thermal cracking reaction products pass through the gate, the air introduction and the thermal cracking gas leakage can be effectively prevented, the sealed molten salt reaction system space is established, the reactants are continuously moved into the front end, the thermal cracking reaction products are continuously moved out of the rear end, the gas in and out is effectively prevented, and the continuous thermal cracking reaction operation target is achieved.

The invention discloses an environment-friendly petrochemical waste residue resource conversion system. The system comprises a feed pretreatment unit, a catalytic cracking reaction unit, a gas-solid separation and quenching unit, an oil-gas condensation separation unit and a tail gas purification treatment unit which are connected in sequence, the feeding pretreatment unit comprises a sealed storage bin, a double-screw conveyor and a quantitative feeder. Long-chain organic matters and heavy components in the waste residues are decomposed to the maximum extent through the catalytic cracking unit at a low temperature, energy consumption is remarkably reduced, and the yield of a target product is increased; due to the multi-stage separation and purification design, high purity of gas-phase and solid-phase products is ensured, heavy metals and dust are effectively intercepted, and secondary pollution is completely eradicated; final products (combustible gas, fuel oil and carbon materials) have direct utilization value, the purpose of really turning waste into wealth is achieved, the tail gas treatment unit adopts a combined technology to ensure that emission reaches the standard, and the whole system is high in automation degree and stable in operation.

The application provides a core-shell structure cracking reaction catalyst and a preparation method thereof. The preparation method comprises the following steps: sequentially performing aluminum dissolution treatment and silicon dissolution treatment on waste molecular sieves to obtain an aluminum-rich liquid and a silicon-rich liquid; sequentially performing gelation treatment, aging treatment and hydrothermal crystallization treatment on raw materials including the aluminum-rich liquid, the silicon-rich liquid and seeds to obtain 13X molecular sieves; sequentially performing first impregnation treatment and second impregnation treatment on the 13X molecular sieves in a silanization reagent solution and a nickel-containing solution to obtain nickel-modified 13X molecular sieves; sequentially performing first hydrothermal reaction and calcination treatment on the nickel-modified 13X molecular sieves and a titanium-silicon molecular sieve precursor solution to obtain core-shell structure 13X molecular sieves; and mixing and stirring the core-shell structure 13X molecular sieves and a platinum precursor solution, then sequentially performing solid-liquid separation, drying, pre-calcination treatment and first calcination treatment to obtain the core-shell structure cracking reaction catalyst, which has high catalytic activity in catalytic cracking reaction.

The utility model discloses an oxygen content control device for a microwave cracking furnace, particularly relates to the technical field of microwave cracking furnaces, and comprises a microwave cracking furnace body, one side of the microwave cracking furnace body is fixedly communicated with an oxygen inlet pipe, the top of the microwave cracking furnace body is provided with a nitrogen release mechanism, and an oxygen control mechanism is arranged in the oxygen inlet pipe; the nitrogen release mechanism comprises a nitrogen tank which is installed on the top of the microwave cracking furnace body. According to the utility model, the nitrogen release mechanism and the oxygen control mechanism are arranged, the oxygen content is accurately controlled, and uniform injection and flow of nitrogen are beneficial to uniform transfer of heat, so that the temperature in the furnace is more uniform, and the safety problem caused by oxygen fluctuation is avoided; according to the method, the situation that due to excessive oxygen, materials are excessively oxidized, and the quality and the yield of cracking products are affected can be avoided, the situation that due to too little oxygen, the cracking reaction is affected can be prevented, and in the biomass cracking process, biochar, biogas and bio-oil products with higher quality can be obtained.

The invention relates to a facility and method for steam cracking using at least one reactor heat exchanger. The heat required for the steam cracking reaction is provided by a working fluid circulating in at least one closed-loop circuit (130), connected to an inlet of the reactor heat exchanger (112) and to the corresponding outlet, and comprising: at least one heating device (131, 132) upstream of the reactor heat exchanger (112) with respect to the circulation of the working fluid, at least one thermal storage system (170) mounted in parallel with or downstream of the at least one heating device, and upstream of the reactor heat exchanger, at least one heat exchanger (134, 135) located downstream of the reactor heat exchanger (112), and upstream of the at least one heating device (131, 132), at least one circulating device (138).

The application provides a light component efficient recovery method, through controlling the rectification separation condition of a Saucy-Marbet reaction liquid, a light component fraction without 2,2-dimethoxypropane or heavier components is obtained, the light component fraction is mixed with a certain amount of a cracking auxiliary, and then is directly introduced into a cracking reactor, 2,2-dimethoxypropane is converted into 2-methoxypropylene and methanol through high-temperature cracking, and then the mixture obtained through cracking is subjected to rectification separation, and the useful component, 2-methoxypropylene, is recycled and utilized. The application simplifies the separation and recycling process of the light component byproduct of the Saucy-Marbet reaction, improves the recycling rate of raw materials, and reduces the operation cost of the project.

The present invention relates to the technical field of petrochemical cracking furnaces, and in particular to a motor-driven ethylene cracking system integrated with steam recovery and a process. A feed stream is heated, and then mixed with s dilution steam stream; the mixture is fed into a convection section of a cracking furnace to be overheated and then fed into a radiation section of the cracking furnace to be subjected to a cracking reaction to obtain cracked gas; the cracked gas is cooled by a quench cooler to obtain a product; a rotating unit in a cracking method is driven by a motor; and a steam drum generates a medium-pressure steam stream, and the medium-pressure steam stream is fed into the quench cooler to be subjected to heat exchange with the cracked gas and then is fed into a medium-pressure steam pipe network. By means of the described technical solution, the rotating unit of the cracking furnace is changed to be driven by the motor to rotate, so that the control is simpler. Moreover, the demand for high-pressure steam is reduced, and the energy utilization efficiency is improved by changing the process flow and connection mode of the cracking furnace.

The invention relates to a method for producing aviation kerosene by hydrogenation of Fischer-Tropsch synthetic oil, which comprises the following steps: carrying out hydrofining reaction by using the Fischer-Tropsch synthetic oil as raw material oil, fractionating the obtained hydrofining product into different components, and feeding into a hydrocracking reactor for deep cracking. Different components can be subjected to cracking reaction on different bed layers, excessive cracking of light fractions is effectively avoided, the total yield of the aviation fuel is greatly improved, the quality of the aviation fuel product is improved, and meanwhile, the energy consumption is reduced, and the treatment capacity and the production economy are improved.