224results about "Extractive distillation" patented technology

The invention relates to an acetylene purification system and method, in particular to a method for removing impurities in acetylene to an electronic-grade acetylene level through a membrane separation technology coupled rectification process, and belongs to the field of gas separation. Aiming at the characteristics of an industrial grade acetylene material, the invention provides a technology for preparing electronic grade acetylene based on membrane separation coupling rectification, the membrane separation technology and the rectification technology are organically coupled, and a safe solvent is introduced into a rectification tower, so that the thermal stability of liquid acetylene is effectively improved, and the explosion risk is remarkably reduced. According to the technology, efficient preparation of the electronic-grade acetylene (the purity is greater than or equal to 99.9999%) is realized, and the method has a good industrial application prospect and popularization value.

The invention provides a coarse methanol five-tower thermal coupling refining process and a refining device.The device comprises a pre-rectifying tower, a normal-pressure rectifying tower, a medium-pressure rectifying tower, a first pressurized rectifying tower and a second pressurized rectifying tower which are sequentially connected, the top of the pre-rectifying tower is connected with a first normal-pressure tower reboiler, and the top of the medium-pressure rectifying tower is connected with a pre-tower reboiler; the top of the pressurized rectifying tower I is connected with a medium-pressure tower reboiler and a pressurized tower II reboiler; the top of the pressurized rectifying tower II is connected with an atmospheric tower reboiler II through a top extraction pipeline of the pressurized tower II; tower top steam of the first pressurized rectifying tower provides heat for the medium-pressure rectifying tower and the second pressurized rectifying tower, tower top steam of the medium-pressure rectifying tower provides heat for the pre-rectifying tower, tower top steam of the pre-rectifying tower and the second pressurized rectifying tower provides heat for the normal-pressure rectifying tower, and heat of the tower tops of all the rectifying towers is fully utilized; through the application, the unit consumption of the methanol rectification process can be reduced from 1.2 t steam / t refined alcohol to 0.50-0.60 t steam / t refined alcohol, so that the energy consumption is greatly reduced.

The utility model discloses ammonia nitrogen removal equipment for anaerobic fermentation biogas slurry, and belongs to the field of ammonia nitrogen removal and recycling of anaerobic fermentation biogas slurry. All deaminated biogas slurry flows back to the anaerobic fermentation system by virtue of a steam stripping flash evaporation deamination technology, an ammonia absorption technology, an evaporative crystallization technology, a mud-mud heat exchange technology and the like. An adopted flash evaporation deamination tower (3) is internally divided into a plurality of areas, ammonia-containing biogas slurry sequentially flows through the areas and is in countercurrent contact with circulating steam and fresh steam in the areas, ammonia nitrogen in the biogas slurry is removed through steam stripping and flash evaporation, and the generated deaminated biogas slurry completely flows back to an anaerobic fermentation system; ammonia in the ammonia-containing steam is absorbed by dilute sulfuric acid in an ammonia gas absorption tower (9), an ammonium sulfate solution is generated and sent to an evaporative crystallization tank (16), indirect heating and circulating evaporative crystallization are adopted, and solid ammonium sulfate is transported outwards; the mud-mud heat exchanger (2) is suitable for heat exchange between non-Newtonian fluid materials. Biogas slurry is no longer discharged, and fixed asset investment of anaerobic fermentation projects with the same gas production scale is reduced.

An injector cleaning system for use with an electrolyte injection system is disclosed. The cleaning system includes condensing container that contains a cleaning solution. The condensing container is constructed to circulate the cleaning solution through the injection system to remove contaminants. The cleaning system also includes a distillation container that is constructed to collect the contaminated cleaning solution within the injection system. The distillation container boils the contaminated cleaning solution to create a cleaning solution vapor and then transfers the vapor to the condensing container, where the vapor is condensed into a cleaning solution for re- circulation through the injection system.

The invention discloses a device and a process method for separating n-hexane, acetone and chloroform by applying an extractive distillation technology to a dividing wall column, and relates to the technical field of chemical processes. The device comprises two parts: one part is an extractive distillation dividing wall tower, and the other part is a solvent recovery tower. According to the technical innovation, two extractive distillation towers in a conventional three-tower extractive distillation process are coupled into one dividing wall tower by utilizing a dividing wall tower technology, so that the dividing wall tower can be used for helping to industrially separate high-purity n-hexane, acetone and chloroform, meanwhile, the use cost of equipment is reduced, the use amount of circulating water and system heat energy is reduced, and the energy consumption is greatly reduced; and as the practicability and the economic benefit are remarkable, the method has a wide application prospect.

The utility model provides a liquid-liquid extraction device, which belongs to the field of extraction processing and comprises a material intermediate tank, an extraction tower, a material receiving tank, a first extraction agent receiving tank, a to-be-evaporated extraction agent receiving tank, an extraction agent evaporator and a second extraction agent receiving tank, the extraction tower comprises a tower top settling section, a heavy-phase tower-entering distributor, a filler section, a light-phase tower-entering distributor and a tower bottom settling section, the to-be-evaporated extraction agent receiving tank is communicated with the tower top settling section, the material intermediate tank is communicated with the heavy-phase tower-entering distributor, the material receiving tank is communicated with the tower bottom settling section, and the light-phase tower-entering distributor is communicated with the filler section. A liquid level high-limit alarm and a heavy phase extraction valve are arranged between the tower bottom settling section and the material receiving tank, the high-limit alarm is in follow-up connection with the heavy phase extraction valve, the material intermediate tank and the first extraction agent receiving tank, and the liquid level high-limit alarm is in follow-up connection with the material intermediate tank, the first extraction agent receiving tank and the heavy phase extraction valve. Compared with the prior art, the technical problem that an existing extraction device is insufficient in automation degree is solved.

The utility model discloses a multifunctional extraction machine which comprises an extraction machine body, two sides of the extraction machine body are respectively and fixedly provided with a dismounting assembly, each dismounting assembly comprises a baffle plate and a side plate, the baffle plates are respectively and fixedly arranged on two sides of the extraction machine body, the side plates are clamped on one sides of the baffle plates, and the top of each side plate is fixedly provided with a connecting ring. The top of the extraction machine body is fixedly provided with a fixing frame, the inner side wall of the fixing frame is connected with a two-way threaded rod through a bearing, the side wall of the two-way threaded rod is connected with a first moving block through threads, and one side of the first moving block is hinged with a connecting rod. According to the multifunctional extraction machine, through the arranged disassembling assembly, the whole extraction machine can be disassembled, disassembling is easy and convenient, after disassembling, the extraction machine body can be overhauled conveniently, when the extraction machine body is damaged, repairing can be conducted in time, repairing is more convenient, and the use effect is effectively guaranteed.

A separation system for separating constituents from a solution by utilizing a carrier gas and a separation method thereof are disclosed. The separation system includes an evaporator, a solution distribution unit connected to the evaporator for distributing the solution into the evaporator, and a gas distribution unit connected to the evaporator for distributing the carrier gas into the evaporator. The solution is countercurrent to the carrier gas and upon contact, at least one constituent of the solution is vaporized and separated from the solution.

The invention relates to a method for separating an n-propyl formate-n-propyl alcohol-water mixture by liquid-liquid phase separation coupling extractive distillation, which comprises the following steps of: dividing a raw material into a water phase and an organic phase by using a phase splitter based on the heterogeneous characteristic of an azeotropic system, and carrying out four-tower operation on a rectifying tower (C1), a rectifying tower (C2), a rectifying tower (C3) and a rectifying tower (C4) to obtain an n-propyl formate-n-propyl alcohol-water mixture. The efficient separation of the n-propyl formate-n-propyl alcohol-water mixture is realized. After separation, the molar fraction of n-propyl formate is greater than 99.99%, the molar fraction of n-propyl alcohol is greater than 99.99%, and the molar fraction of water is greater than 99.99%. The method provided by the invention realizes high-efficiency and low-energy-consumption separation of the n-propyl formate-n-propanol-water azeotropic mixture, and has economic benefits and environmental friendliness.

The invention discloses a synthesis process of tungsten hexafluoride, and relates to the technical field of special gas synthesis. The process comprises the following steps: mixing ammonium fluoride and hydrofluoric acid to prepare an activation solution, carrying out ultrasonic activation treatment on tungsten powder to obtain pretreated tungsten powder, and reacting the pretreated tungsten powder with fluorine gas at a certain temperature and pressure to prepare a liquefied crude product tungsten hexafluoride; the preparation method comprises the following steps: by taking aluminum sec-butoxide and the like as raw materials, carrying out sol-gel and ethanol supercritical drying and calcining to prepare highly porous activated aluminum oxide; gasifying the crude tungsten hexafluoride, adsorbing with activated aluminum oxide, and rectifying to obtain purified tungsten hexafluoride liquid; and finally, dissolving in liquid sulfur dioxide, treating under illumination with the wavelength of 395nm, and carrying out distillation separation to obtain high-purity tungsten hexafluoride. According to the method, the activation pretreatment is combined with multi-stage purification, so that the purity and the synthesis efficiency of tungsten hexafluoride are remarkably improved.

This propylene oxide purification device is provided with a line LX and / or a line LY. The line LX is configured so as to supply a liquid in a first drum D10 to a first distillation column T10 via a feed inlet 10i of the first distillation column T10, and the line LY is configured so as to supply a liquid in a third drum D30 to the first distillation column T10 via the feed inlet 10i of the first distillation column T10.

A production system, production method and application of general-purpose high-purity chemicals are disclosed. The production system includes a raw material tank, and an adsorption system, a crystallizer, a first light-impurity removal tower, a first heavy-impurity removal tower, a second light-impurity removal tower, a motorized tower, a second heavy-impurity removal tower, a vapor permeation device, a membrane separation system and a filling system connected with the raw material tank in sequence. The high-purity chemicals produced by the above system have high purity and excellent quality. Compared with the prior art, the system and method designed by the present disclosure have more pertinence, integrity, progressiveness, energy-saving, precision, high safety coefficient and great industrial promotion value. And the products produced are of excellent quality, which can meet the standards applied to the manufacturing of integrated circuit electronic components and meet the high-end needs of the semiconductor industry market.

The utility model discloses a constant-temperature structure of aromatic hydrocarbon solvent distillation equipment, which relates to the technical field of aromatic hydrocarbon extraction and comprises a base, a heating seat fixedly connected to the upper end of the base, a constant-temperature tank fixedly connected to the upper end of the heating seat, a distillation retort arranged inside the constant-temperature tank, and a fixing frame fixedly connected to the outer surface of the distillation retort. The fixing frame is fixedly connected with the inner wall of the constant-temperature tank, a distillation outlet is formed in the upper end of the distillation tank, a feeding port is formed in the side face of the distillation tank, a liquid level control mechanism is arranged at the feeding port, a heating component and a constant-temperature module are arranged between the constant-temperature tank and the distillation tank, and a moving unit is arranged at the lower end of the base. The aromatic hydrocarbon solvent is heated and distilled through the heating component, heating is uniform, the aromatic hydrocarbon solvent is subjected to constant-temperature distillation through the constant-temperature module, and the distillation efficiency and the distillation effect are improved; and through the liquid level control mechanism, when the liquid level is low, the aromatic solvent can be automatically added, so that the influence on distillation caused by unknown distillation of the aromatic solvent or too little aromatic solvent is avoided.

The utility model relates to the technical field of chemical separation, in particular to a dual-purpose extractive distillation tower for separating acetic acid from water, which comprises an extraction tower, a condenser I, a condenser II and a reboiler, an extraction chamber, a distillation chamber and a circulation chamber are arranged in the extraction tower, the distillation chamber and the extraction chamber are symmetrically arranged, and the circulation chamber is positioned below the distillation chamber and the extraction chamber. The first condenser and the second condenser are located above the extraction tower, the first condenser is communicated with the extraction chamber, the second condenser is communicated with the rectification chamber, and by integrating the two functions of extraction and rectification, the tower achieves effective separation of acetic acid and water. The layered contact design ensures that the acetic acid raw material and the composite extraction agent are in full contact but not directly mixed between filler layers, the mass and heat transfer process is optimized, the extraction agent can be recycled after being treated by the rectification chamber, and the resource waste is remarkably reduced. And due to the recycling design, the operation cost is reduced, and the consumption of the extracting agent is reduced.

The invention provides a catalyst performance testing device with real-time monitoring and data analysis functions, the catalyst performance testing device comprises a filter, a pressure stabilizing valve, a dryer and a testing assembly, one side of the filter is fixedly connected with the pressure stabilizing valve, one side of the pressure stabilizing valve is fixedly provided with the dryer, one side of the dryer is fixedly provided with the testing assembly, and the testing assembly is fixedly connected with the pressure stabilizing valve. The filter is arranged to prevent impurities from entering a reaction zone of a catalyst to influence the accuracy of catalytic reaction, the pressure stabilizing valve adjusts the pressure of gas or liquid flow to ensure that the pressure in the system is always kept in a set range, so that the reaction environment is kept stable, and the dryer is arranged to effectively remove unwanted moisture in the system; according to the device, various impurities mainly including thiophene in crude benzene are completely removed by hydrogenation through a hydrogenation method, all sulfides are converted into H2S, nitrides are converted into NH3, oxides are converted into H2O, unsaturated hydrocarbons are subjected to hydrogenation saturation, and then the impurities are removed by extractive distillation, so that high-quality benzene is produced.

The present invention relates to a Venturi separator, characterized in that the Venturi separator comprises a Venturi tube and a liquid-phase collector tube which encloses at least a part of the structure of the Venturi tube, wherein the Venturi tube comprises the following sequentially connected sections: an optional constant-diameter section, a reduced-diameter section, a neck and an expanded-diameter section, and the Venturi separator has a gas-phase inlet, a liquid-phase inlet, a liquid-phase outlet and a gas-phase outlet, wherein an opening is provided on a side wall of the expanded-diameter section of the Venturi tube or at the end of the expanded-diameter section, the opening leading to the liquid-phase collector tube so that a liquid phase can leave the Venturi tube and enter the liquid-phase collector tube under centrifugal force.The present invention also relates to the use of the Venturi separator in chemical processes.

The invention provides a method and a system for purifying 4-hydroxybutyl acrylate based on film evaporation coupled extractive distillation, a reaction solution obtained after esterification reaction of acrylic acid and 1, 4-butanediol is subjected to film evaporation to obtain light component acrylic acid and concentrated solution, and the concentrated solution comprises 1, 4-butanediol, 4-hydroxybutyl acrylate, 1, 4-butanediol, 1, 4-hydroxybutyl acrylate, 1, 4-butanediol, 1, 4-butanediol, 1, 4-butanediol, 1, 4-butanediol, 1, 4-butanediol, 1, 4-butanediol and 1, 4-butanediol. The preparation method comprises the following steps: adding 1, 4-butanediol diacrylate, an esterification reaction catalyst and a polymerization inhibitor; carrying out extractive distillation on the concentrated solution and an extractant ionic liquid to respectively obtain a product 4-hydroxybutyl acrylate and a post-reaction extractant; and rectifying the reacted extracting agent, recovering the extracting agent, and reusing the extracting agent for extractive distillation. By adopting thin film evaporation, the separation period can be effectively shortened, and the polymerization risk is reduced; extractive distillation not only shortens the separation period and reduces the risk of polymerization, but also the ionic liquid can break azeotropy among 1, 4-butanediol, 4-hydroxybutyl acrylate and 1, 4-butanediol diacrylate, the high-purity product 1, 4-butanediol is obtained through separation, and purification of 4-hydroxybutyl acrylate is achieved.

Systems and methods for separation of a component from a mixed gas stream by a combination of direct contact heat and material exchange in an indirect contact heat exchanger are disclosed. A contact liquid stream wets an interior surface of the process channel of the indirect contact heat exchanger and the mixed gas stream passes through the process channel, contacting the contact liquid stream for heat and mass exchange. A refrigerant in the refrigerant channel of the indirect contact heat exchanger is used for heat exchange with the contact liquid.

The invention discloses a radish leaf integrated intelligent extracting and sorting system, which relates to the technical field of radish leaf processing, and comprises two ultrasonic cleaning devices, a material transfer device, a first crushing device, a distillation extraction device, a condensation collection device, a conveying and drying device, a second crushing device and a cyclone separator, an output port in the lower end of the side wall of the first crushing device is connected with an input port in the upper end of the side wall of the distillation extraction device, the condensation collection device is arranged on the side wall of the distillation extraction device, and the input end of the conveying and drying device is arranged at the lower end of the distillation extraction device; the input end of the second smashing device is connected with the output end of the conveying and drying device, and the output end of the second smashing device is connected with the input end of the cyclone separator through a pipeline. Raphanous radish leaves are changed into products with rich values.

The invention relates to the technical field of chemical separation and extractive distillation, and discloses a method for separating n-hexane and methylcyclopentane by an organic Rankine cycle assisted extractive distillation dividing wall column. The device comprises two parts, one part is a cyclohexane separation tower, and the other part is an organic Rankine cycle auxiliary extractive distillation dividing wall tower. The technical innovation lies in that the original double-tower extractive distillation is coupled into a single dividing wall tower, the separation of a multi-component mixture can be realized, and meanwhile, the organic Rankine cycle is introduced from the perspective of power generation to realize the recovery of sensible heat in the tower kettle material flow of the main tower and power generation. According to the device, on one hand, the extractive distillation dividing wall column is adopted to replace the original double-column extractive distillation, so that the backmixing problem among components can be reduced, and the energy consumption and the investment cost can be reduced; and on the other hand, organic Rankine cycle is adopted to convert heat energy into electric energy, effective utilization of waste heat is achieved, and wide application prospects are achieved.

The invention belongs to the technical field of separation and purification, and particularly relates to a method for separating a methanol-dimethyl carbonate azeotrope system, which adopts a system for separating a methanol-dimethyl carbonate azeotrope and adopts a eutectic solvent as an extracting agent for extractive distillation. The hydrogen bond acceptor of the deep-eutectic solvent is choline chloride, and the hydrogen bond donor of the deep-eutectic solvent is malonic acid or urea. According to the method, the choline chloride deep eutectic solvent which is lower in cost, simpler and more convenient to prepare and more environmentally friendly is selected as the extracting agent, systematic process parameter optimization and equipment configuration design are carried out according to the high-viscosity characteristic of the choline chloride deep eutectic solvent, and stable, efficient and long-period operation of the high-viscosity green solvent in the continuous extractive distillation process is successfully achieved; the target of separating the methanol and the dimethyl carbonate from the binary mixture is achieved, the final yield of the methanol and the dimethyl carbonate can reach 99% or above, the product purity can reach 99.5% or above, and compared with a traditional solvent separation method, the energy consumption is greatly reduced, the equipment cost is saved, and the method is suitable for industrial production. The strict standard of the high-end chemical industry and the fine chemical industry on the raw material purity can be reached.

The invention provides an efficient pyridine dehydration device and method based on a partition wall extractive distillation column, and belongs to the field of chemical separation, the efficient pyridine dehydration device comprises the partition wall extractive distillation column, the partition wall extractive distillation column is provided with an extraction agent inlet, a raw material inlet and an extraction agent extraction outlet, and a vertically arranged partition plate is arranged in the partition wall extractive distillation column; the partition wall extractive distillation tower is divided into a main tower and an auxiliary tower which are transversely distributed by the partition plate, and a public stripping section communicated with the main tower and the auxiliary tower is formed at the lower end of the partition plate. According to the invention, the functions of an extractive distillation tower and a solvent recovery tower are combined, and a form of a main tower and an auxiliary tower is formed in one tower, so that the number of equipment is obviously reduced, the occupied area of the equipment is effectively reduced, the space resource of a factory is saved, meanwhile, connecting pipelines and related accessories between the equipment are reduced, and the integration level of the equipment is improved by more than 30%; the design of the partition wall optimizes the material flow distribution in the tower, so that the rectification process is more efficient.

The invention discloses a chloroform / ethanol / water system extraction variable-pressure rectification process for comprehensive utilization of latent and sensible heat, which realizes efficient and comprehensive utilization of energy through three-tower operation of an extraction reduced-pressure rectification tower T1, an extraction rectification tower T2 and a solvent recovery reduced-pressure rectification tower T3. The tower top steam of the extractive distillation tower T2 is used for heating the tower bottom liquid of the extractive decompression distillation tower T1 to vaporize the tower bottom liquid, and meanwhile, the tower top steam of the solvent recovery decompression distillation tower T3 is used for carrying out heat exchange on part of the liquid phase of the middle plate of the extractive decompression distillation tower T1; the problem that the tower top temperature of the solvent recovery vacuum distillation tower T3 is between the tower top temperature of the extraction vacuum distillation tower T1 and the tower kettle temperature, and traditional heat integration cannot be achieved is solved, and latent heat utilization is achieved. In addition, the tower kettle liquid of the solvent recovery vacuum distillation tower T3 is used for heating the tower kettle liquid of the extraction distillation tower T2 and the extraction vacuum distillation tower T1, and sensible heat utilization is achieved. According to the process, heat energy is fully utilized, energy consumption is reduced, the purity and yield of chloroform, ethanol and water are improved, and the equipment cost is reduced. And the adopted extracting agent is small in dosage, relatively weak in volatility, small in loss, easy to recover and environment-friendly.

The invention belongs to the field of sugar industry, and discloses a method for enriching and separating sugarcane flavor substances. A co-processing method of sugarcane juice acid adjustment, heating, vegetable tannin coagulation, plate frame filtration, secondary heating, high-temperature evaporation, condensation, subcritical extraction and distillation is mainly adopted, filtered juice subjected to existing plate frame filtration treatment is high in quality, the water content of a filter cake is low, and the extraction, enrichment and purification processes of sugarcane flavor substances are green production processes. The method has the advantages that the method is simple in operation, the influence on subsequent processing of the sugar juice is small, the comprehensive utilization value of the obtained filter mud, deodorized water and other byproducts is high, the sugarcane flavor substance enrichment and separation system has the characteristics of compact and advanced equipment, high efficiency and the like, products are diversified, the value of the byproducts is high, and the comprehensive economic benefit and social benefit are very remarkable.

The invention provides a method for separating an ethanol-isopropanol-n-propanol mixture and a rectification device, and belongs to the technical field of extractive rectification. According to the method, 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM] [BF4] is adopted as an extraction agent, during extraction and separation by the method, the mass fraction of n-propyl alcohol can reach 99.9%, the mass fraction of ethanol is 99.87%, and the recovery rate of the extraction agent exceeds 99.9%; compared with a common organic extraction agent, the organic extraction agent has a better separation effect, high-purity ethanol and n-propanol can be obtained, and the problem of environmental pollution caused by volatilization of the common organic solvent can be avoided; the method has good application in extraction separation and recycling of an ethanol-isopropanol-n-propanol mixture.

The invention belongs to the field of chemical engineering, and relates to a high-water-content low-carbon alcohol separation system and a process method thereof, the system comprises a first crude separation tower, a second crude separation tower, a stripping tower, a regeneration tower, a methanol tower, an ethanol tower, an isopropanol tower, an n-propanol tower and an n-butanol tower, each tower is provided with a condenser and a reboiler, and a mixed alcohol raw material is subjected to a crude dehydration and extractive distillation dehydration mode. Coarse dehydration, namely dehydration by a coarse separation tower and a stripping tower, can remove about two thirds of water with lower energy consumption; compared with an azeotropic distillation dehydration process, the extractive distillation dehydration process is lower in energy consumption and higher in efficiency, a heat exchange network of the separation process is optimized, and energy consumption is greatly reduced.

The invention belongs to the field of styrene extraction, and relates to a long-period operation system and method of a styrene extraction device. Comprising an extraction rectifying tower, an extraction rectifying tower reflux tank, a solvent recovery tower, a solvent recovery tower reflux tank, a water washing tower, an oil washing oil recovery tower, a lean solvent oil washing mixer and a water washing water preheater, a tower top discharging pipeline of the extraction rectifying tower is connected with an extraction rectifying tower return tank, a tower bottom discharging pipeline is connected with the solvent recovery tower, a water-in-water discharging pipeline of the extraction rectifying tower return tank is sequentially connected with the washing water preheater and the washing tower, and a tower top discharging pipeline of the solvent recovery tower is connected with the solvent recovery tower return tank. One tower bottom discharging pipeline is connected with a lean solvent oil washing mixer and a water washing tower, a water-in-water discharging pipeline of a solvent recovery tower return tank is connected with an extraction rectifying tower return tank or an extraction rectifying tower, and a tower top discharging pipeline of the water washing tower is connected with an oil washing oil recovery tower. According to the invention, the generation source of the polymer is fundamentally cut off, and the long-period stable operation of the device is realized.

This disclosure provides a method for efficiently purifying difluoromethane (HFC-32).Specifically, the present disclosure provides a method for producing a purified HFC-32, the method including:an extractive distillation step of contacting a composition containing difluoromethane (HFC-32) and a component X with a solvent A to obtain a composition containing a reduced component X from the composition,wherein the component X is at least one selected from the group consisting of pentafluoroethane (HFC-125), 1, 1, 1-trifluoroethane (HFC-143a), and dichlorodifluoromethane (CFC-12), andwherein the solvent A is at least one of an amine and a fluorinated ether.

The invention belongs to the technical field of petrochemical industry, and discloses an energy-saving method and device for refining 1-butene from etherified C4. The method comprises the following steps: carrying out selective hydrogenation on etherified C4 to remove butadiene, feeding the etherified C4 into a pretreatment tower adopting a heat pump technology for primary separation, and extracting a fraction rich in 1-butene from a side line; the fraction enters an extractive distillation tower, and efficient separation of 1-butene and butane is achieved by adding an extractant; the rich solution containing 1-butene is separated by a product tower to obtain a high-purity 1-butene product; and the high-temperature lean solvent extracted from the bottom of the product tower sequentially flows through a plurality of heat exchange devices such as an intermediate reboiler of the extractive distillation tower, a second reboiler of the pretreatment tower, a raw material preheater and the like, and is recycled after waste heat is fully recovered. The invention also provides an alternative scheme for additionally arranging the solvent recovery tower and a corresponding device. The process flow is reasonable, the energy integration level is high, the consumption of steam and cooling water can be greatly reduced, and the obvious energy-saving effect and economical efficiency are achieved.