318results about "Extractive distillation" patented technology

The invention belongs to the technical field of octafluoropropane purification, particularly relates to a device and a method for purifying octafluoropropane, and provides the following scheme aiming at the problems that gas flows to easily generate bubbles and the bubbles wrap impurities in the processes of octafluoropropane rectification and the like: the device comprises a rectifying tower, the bottom of the rectifying tower is fixedly connected with an extraction liquid box, and a round hole is formed in the outer side of the rectifying tower; a purification outlet is fixedly connected to the interior of the round hole, a spraying head is arranged in the rectifying tower, and an input pipe is fixedly connected to the top end of the spraying head. According to the device and method for purifying the octafluoropropane, the bubble breaking piece accurately breaks bubbles, impurities and the octafluoropropane are thoroughly separated, the spoiler strengthens the separation effect, the impurities are evenly enriched, the liftable suction outlet is matched, the impurities are accurately sucked away, impurity residues in a finished product are greatly reduced, and the product quality is improved. And the purity of the perfluoropropane is assisted to stably reach a high standard.

Methods and systems for recuperating power from a pressurized fluid stream of a carbon capture system are disclosed. A compressor pressurizes the carbon dioxide containing feed fluid and passes this fluid stream through a carbon capture process. The pressurized stream is expanded across a turbine where power is recovered.

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 present application provides a molten salt extraction and distillation separation device for zirconium and hafnium tetrachloride, comprising a distillation tower, a reboiler, a reflux tank, a circulation tank, a sublimator, a gas preheater, and a condenser. During installation, the various components are connected in sequence to obtain a complete molten salt extraction and distillation separation device for zirconium and hafnium tetrachloride. The device has a simple structure, is easy to operate, and is convenient to connect, and is suitable for the molten salt extraction and distillation separation of zirconium and hafnium tetrachloride.

The utility model provides an aromatic hydrocarbon extraction device. The aromatic hydrocarbon extraction device comprises a de-heavy tower, an extraction tower, a recovery tower, a first rectifying tower and a second rectifying tower which are connected in sequence, a tower top steam outlet of the de-heavy tower is connected with a heat source inlet of an extraction tower reboiler, and a heat source outlet of the extraction tower reboiler is connected with a feed port of the extraction tower through a de-heavy tower return tank. A discharge port of the extraction tower is connected with a feed port of the recovery tower, a tower top steam outlet of the recovery tower is connected with a feed port of the first rectifying tower through a recovery tower return tank, and a discharge port of the first rectifying tower is connected with a feed port of the second rectifying tower. The aromatic hydrocarbon extraction device disclosed by the utility model has the characteristics of high aromatic hydrocarbon extraction rate, high purity, energy conservation and high efficiency.

Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

The utility model discloses a separation device for ethyl acetate and cyclohexane, which belongs to the technical field of separation and purification, solves the problems of incapability of large-scale separation, high process difficulty and poor separation effect in the prior art, and comprises an extractive distillation tower, the upper part is provided with a polyol solvent inlet, the top is connected with a first condenser, the outlet of the first condenser is connected with a cyclohexane outlet on the other side of the upper part of the extractive distillation tower, and the cyclohexane outlet is connected with a re-separation device. According to the device disclosed by the utility model, the problem of azeotropy of ethyl acetate and cyclohexane is solved by adding polar polyol, the relative volatility of the ethyl acetate and the cyclohexane is changed, and large-scale efficient separation of a mixture of the ethyl acetate and the cyclohexane is realized; the dissolubility of cyclohexane, sodium acetate and ethanol in water is different, so that the separation effect of cyclohexane is further improved, and the whole device is simple in structure.

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 present invention relates to the technical field of rectification separation of chemical waste liquid, and particularly relates to a solvent rectification device for treating chemical waste liquid, including a frame, an installation box, a tower body, etc. Two installation boxes are connected to the frame, and the tower body is jointly installed on the two installation boxes, and the installation box and the tower body are communicated. In the present invention, chemical waste liquid can be injected into the tower body through a waste liquid pipe, and a high-boiling solvent can be injected into the tower body through a solvent pipe, breaking the original azeotropic condition and changing the relative volatility between components, so as to achieve rectification separation. The packing can be conveyed upward through a screw conveyor and conveyed into the tower body for loading. The slide plate can be driven to move to the right by a lead screw motor, so that the discharge hole corresponds to the tower body. The old packing falls onto the guide plate through the discharge hole and rolls leftward for discharge, automatically cleaning and replacing the packing, which can save human and material resources and improve safety.

The invention relates to the technical field of extractive distillation, in particular to a plant essence extractive distillation method, device and system, and the method comprises the following steps: acquiring temperature data, pressure data and flow data; acquiring average temperature data at each moment, respectively recording the average temperature data, the pressure data and the flow data as related data, and acquiring oscillation degree values of various related data in the monitoring time period; respectively acquiring a first influence coefficient and a second influence coefficient of the monitoring time period; acquiring a coupling disturbance index in the current monitoring time period; acquiring an unbalance coefficient of temperature distribution in the current monitoring time period according to the temperature data at each moment; and the rectification abnormal coefficient of the current monitoring time period is obtained by combining the coupling disturbance index in the current monitoring time period, so that the prediction range parameter in the model prediction control technology in the next monitoring time period is obtained, and the reflux quantity of the next monitoring time period is adjusted. According to the method, the extractive distillation purity of the plant extract is improved by optimizing the prediction range parameters.

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.

The continuous production heat pump assisted integrated extractive distillation device is adopted to realize high-purity separation and recovery of the diethyl ether-methyl formate-n-pentane azeotrope, and separation is realized by utilizing the characteristic that the extraction agent has great influence on the relative volatility of the diethyl ether-methyl formate-n-pentane azeotrope. The purity of the separated diethyl ether, n-pentane and methyl formate reaches 99.9% or above, high-purity recycling of the extraction agent can be achieved, the separation cost is greatly reduced, and the method is low in energy consumption and flexible to operate.

A process for preparing a purified benzene composition from a crude hydrocarbon stream containing at least 10% by volume of benzene is provided. The process comprises subjecting the crude hydrocarbon stream and a further recycled benzene containing stream to a solvent-based extraction so as to produce a benzene enriched aromatic stream and a benzene depleted non-aromatic stream, subjecting the benzene enriched aromatic stream to a hydrodesulfurization so as to obtain a desulfurized aromatic stream, subjecting the desulfurized aromatic stream to a distillation producing a purified benzene stream and a further benzene containing stream having a benzene concentration of between less than 100% by weight and the azeotropic benzene concentration, and at least partially recycling the further benzene containing stream.

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.

RECOVERY OF MONO-PROPYLENE GLYCOL USING A DISTILLATION SOLVENT A method for recovering mono-propylene glycol from a mixture feed comprising bio-derived diols and an organic impurity is disclosed. The method comprises: - supplying the mixture feed to a first distillation column comprising 20 to 200 theoretical stages, in which first distillation column a first distillation process is carried out; - supplying a distillation solvent to the first distillation column, wherein the distillation solvent is a diol or a sugar alcohol having a boiling point at least 80°C higher than the boiling point of mono-propylene glycol at atmospheric pressure, and wherein the weight ratio of the distillation solvent to the total mixture feed is between 2.5:1 and 10:1;- the separation of the organic impurity from the mono-propylene glycol using the distillation solvent by carrying out the first distillation process at a head temperature of between 70 and 140°C and a head pressure of between 0.01 and 0.2 bar, and with a reflux ratio of between 2 and 50; and – the recovery of the mono-propylene glycol. (FIG. 1);

An apparatus, in particular for separating and purifying styrene from a crude mixture comprising styrene, comprises a steam generating unit and a divided wall distillation column wherein the divided wall distillation column comprises a divided wall comprising a first portion, the first portion extends at least substantially vertically downward from a point located below the top of the distillation column to a point located above the bottom of the divided wall distillation column so as to subdivide the divided wall distillation column into: a top section located above the dividing wall; a bottom section below the partition wall; and a middle section comprising a first middle sub-section on one side of the first portion of the partition wall and a second middle sub-section on an opposite side of the first portion of the partition wall, where the partition wall further comprises a second portion connected to an upper portion of the first portion of the partition wall, at least one part of the bottom section, which extends at least over 10% of the height of the divided wall distillation column, has a smaller cross-sectional area than the middle section of the divided wall distillation column, and wherein at least one part of the bottom section, which extends at least over 10% of the height of the divided wall distillation column, has a smaller cross-sectional area than the middle section of the divided wall distillation column, the dividing wall type distillation column further comprises a feed inlet pipeline, an extraction solvent inlet pipeline, a steam inlet pipeline connected with the steam generating unit, an overhead outlet pipeline, a bottom outlet pipeline and a side outlet pipeline connected with the second middle sub-section of the dividing wall type distillation column, the plant further comprises a side condenser and a liquid-liquid separator, where the side outlet line is connected to the side condenser and downstream thereof to the liquid-liquid separator, where the liquid-liquid separator is connected to the water line leading into the steam generating unit.

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.

The invention relates to a method for separating acetone, methanol and dichloromethane through extractive distillation by using a mixed extractant. The extractive distillation has the characteristics of simplicity in operation, high flexibility and high separation efficiency. Compared with a single extraction agent, the mixed extraction agent can generate a unique effect, so that the azeotrope is easier to separate. On the basis of extractive distillation of a mixed extractant, a heat pump technology and a heat integration technology are combined to reinforce the process, efficient separation of a ternary mixture is realized, the molar fraction of acetone after separation is greater than 99.93%, the molar fraction of methanol is greater than 99.92%, and the molar fraction of dichloromethane is greater than 99.97%. The method solves the problem that the azeotropic system is difficult to separate by using conventional rectification, is simple to operate, is economical and environment-friendly, and can realize effective separation of the ternary azeotropic mixture.