496 results about "Chemical separation" patented technology

Methods, devices, and systems for improving the quality of electrospray ionization mass spectrometer (ESI-MS) data are described, as are methods, devices, and systems for achieving improved correlation between chemical separation data and mass spectrometry data.

The invention discloses a rectification mechanism and a carbon disulfide production system containing the same. The rectification mechanism comprises an integrated rectification tower, and an inner cavity of a shell of the integrated rectification tower is sequentially divided into a function-integrated pre-separation and sulfur removal area, a main rectification and hydrogen sulfide removal area and a condensation reflux area from bottom to top in the vertical direction; the pre-separation and sulfur removal area comprises a settling tank arranged at the lower part of the shell, a gathering cover arranged above the inner wall of the settling tank, and a gas rising pipe I arranged above the gathering cover; the invention belongs to the technical field of chemical separation, and achieves the technical effects that multi-stage functions of pre-separation, main rectification, precise purification, final condensation and the like are innovatively integrated in a single tower, so that the fundamental simplification and compactness of the equipment structure are realized; in the traditional process, separate coarse removal, fine removal and finished product towers are replaced by unique expanded settling tanks in the towers, filler layers of integrated plate heat exchangers, tower tops with spiral condensation channels and side-draw systems.

The invention relates to the technical field of chemical separation, in particular to a cyclohexanone rectification and purification method based on high-tower segmented packing, which comprises the following steps: step 1, filtering a cyclohexanone raw material containing impurities to remove solid particles, and dynamically adjusting the filtering precision according to the viscosity of the raw material; 2, arranging a bottom section, a middle section and a top section in the vertical high tower; the temperature gradient of each section is regulated and controlled through an independent temperature control unit, so that the temperature gradient of the middle section is matched with the relative volatility of the cyclohexanone-light component; 3, dynamically adjusting the reflux ratio based on the real-time detection result of the purity of the tower top distillate, and controlling an intermittent discharge valve according to the density change of the tower bottom heavy component enrichment liquid so as to continuously remove the heavy components; and 4, recycling the waste heat of the steam at the top of the tower for preheating the raw materials, and inhibiting the tower pressure fluctuation through a buffer tank. Through the innovative design of sectional packing of the high tower, the separation efficiency is improved, the energy consumption is reduced, and meanwhile, the equipment reliability is improved.

The invention discloses a supergravity continuous foam separation device and method, and belongs to the technical field of chemical separation. The device comprises n supergravity rotating packed beds and (n + 1) foam columns, when n is equal to 2, the device comprises first and second supergravity rotating packed beds and first, second and third foam columns; a gas inlet of the first supergravity rotating packed bed and a gas inlet of the first foam column are simultaneously connected with a gas conveying pipeline, and a foam outlet of the first foam column is connected with a liquid outlet of the first supergravity rotating packed bed; a gas inlet of the second foam column is connected with a gas outlet of the first rotating packed bed, and a foam outlet of the second foam column is connected with a gas inlet of the second supergravity rotating packed bed; a gas inlet of the third foam column is connected with a gas outlet of the second supergravity rotating packed bed; a liquid inlet of the first rotating packed bed is simultaneously connected with a liquid outlet of the second rotating packed bed and a liquid conveying pipeline. According to the invention, efficient separation of target substances is realized, and the method is suitable for a continuous operation process.

The invention provides a novel filtration apparatus for the selective separation of metals from a mixture thereof. The invention also provides a method for the separation and isolation of metals from a sample using electrochemical precipitation.

Disclosed herein are systems and embodiments for improving energy efficiency of a chemical separations plant through heat integration. Heat integration may provide heating loops between distillation columns and / or integrated electric heating components configured to supply heat to reboilers in the chemical separations plant. Heat integration may use heat from an associated chemical synthesis plant configured to carry out an exothermic reaction (e.g., production of methanol from CO2 and H2). Such integrated process designs allow for the use of “low-grade” heat, thereby improving energy efficiency. Furthermore, such integrated process designs allow for electrification of exemplary chemical separations plants, replacing the use of steam as a heating medium with more energy efficient and carbon-emission neutral, electrical methods.

The utility model relates to the technical field of chemical separation, and provides a dividing wall column and a rectification device.The dividing wall column comprises a column body, a partition plate, a first distributor and a first liquid collection tray, the partition plate is arranged in the column body and extends in the height direction of the column body, and the top face of the partition plate and the inner top wall of the column body are arranged at intervals in the height direction of the column body; the bottom surface of the partition plate and the inner bottom wall of the tower body are arranged at intervals; in the height direction intersecting with the tower body, one side wall face of the partition plate and a part of the inner wall of the tower body define a feeding section, the other side wall face of the partition plate and the other part of the tower body define a discharging section, the first distributor is arranged in the feeding section and connected with the tower body and the partition plate, and the first liquid collecting disc is arranged in the discharging section and connected with the tower body and the partition plate. According to the invention, the problems of high energy consumption and large occupied area when silicate ester is separated in a double-tower rectification mode can be solved.

The invention discloses an electrochemical separation and recovery method for multiple metals. The method comprises the following steps: providing an electrolytic bath with a cation exchange membrane; the electrolytic cell is divided into a cathode chamber and an anode chamber by the cation exchange membrane; providing a cathode and an anode; preparing an electrolyte solution; placing a multi-metal-containing thiosulfate leachate, a chlorate and an anode in the anode chamber, and placing the electrolyte solution and a cathode in the cathode chamber; and voltage is applied to the cathode and the anode, and after the reaction is completed, base metal deposited on the cathode and precious metal deposited on the anode are recycled respectively. The electrolysis device provided with the cation exchange membrane is adopted, precious metal complex ions and other metal ions are separated and stored in different electrolysis chambers under the action of an electric field, precious metal is recycled at the anode and other metal is recycled at the cathode by further combining chemical and electrochemical actions, and the separation and purification process of the metal recycling process can be shortened.

The invention provides a shearing, cavitation and separation integrated device for desorption of waste oil-based drilling mud oil sludge, which comprises a static cylinder in which a rotating cylinder and a rerotator are arranged at an interval; the drum is driven by a motor to rotate; a dispersion cavity, a cavitation cavity and a separation cavity which are communicated with one another are sequentially formed in the static cylinder; a radially arranged scattering rod is arranged at the part, located in the dispersing cavity, of the outer wall of the rotary drum, and the slurry fluid is scattered through rotation of the scattering rod; static teeth mounted on the inner wall of the static cylinder and movable teeth mounted on the outer wall of the rotating cylinder are arranged in the cavitation cavity, the movable teeth and the static teeth are in clearance fit, and the movable teeth rotate to shear fluid to generate a cavitation effect; the separation cavity is used for separating fluid, so that heavy-phase sludge flows out from an underflow outlet of the static cylinder, and light-phase oil water flows out from an overflow outlet of the static cylinder; the method does not depend on chemical separation agents, environmental pollution is reduced, resource recovery is achieved, and the treatment cost is reduced.

The invention discloses a metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of chemical separation. The preparation method of the metal organic framework material provided by the invention comprises the following steps: taking water and methanol as solvents, taking 4, 4 '-dipyridyl and malic acid as organic ligands, adding a zinc source, reacting, and in the reaction process, connecting oxygen atoms on the malic acid with zinc ion bonds on the zinc source to form a 2D layered network structure, the two-dimensional layered network structures are bridged through 4, 4 '-dipyridyl to form a 3D rigid network framework, and after the reaction is finished, the metal organic framework material is prepared. The metal organic framework prepared by the invention has a superstrong capture effect and a large storage space on acetylene molecules, and also has an excellent separation effect on an acetylene and carbon dioxide mixed system, so that the aim of purifying acetylene in the acetylene and carbon dioxide mixture at high purity and high yield is achieved.

The present invention belongs to the technical field of chemical separation and purification, and specifically relates to a method for removing impurities from a hydroxylamine aqueous solution. The method for removing impurities from a hydroxylamine aqueous solution provided by the present invention comprises the following steps: mixing a hydroxylamine aqueous solution and an alkaline compound for sedimentation and then performing solid-liquid separation to obtain a liquid phase; the alkaline compound comprises barium hydroxide or calcium hydroxide; the liquid phase is passed through an ion exchange column for ion exchange to obtain a purified hydroxylamine aqueous solution; the resin in the ion exchange column is a resin containing phenolic hydroxyl groups. The phenolic hydroxyl-containing resin used in the present invention is easy to obtain, has a wide range of sources, and has low cost. The present invention first uses an alkaline solution to remove sulfate or phosphate in a hydroxylamine aqueous solution, and then uses a phenolic hydroxyl-containing resin to efficiently, quickly, and conveniently remove metal ions in the hydroxylamine aqueous solution without reacting with hydroxylamine. The impurity removal method provided by the present invention has the advantages of simple operation and obvious purification effect, and has good industrial prospects.

The utility model relates to the technical field of coal chemical industry processing equipment, and particularly discloses a coal chemical industry separation tower which comprises an upper filter plate and a lower filter plate, a lower filter plate; a cleaning brush; and a wedge block. According to the utility model, the filter holes in the upper filter plate are cleaned through the cleaning brush, meanwhile, the wedge-shaped grooves in the cleaning brush are in contact with the wedge-shaped blocks, the wedge-shaped blocks drive the upper filter plate and the lower filter plate to move downwards due to the fact that power exists when the cleaning brush rotates, meanwhile, the elastic pieces are compressed, and when the wedge-shaped grooves in the cleaning brush cross over the wedge-shaped blocks, the wedge-shaped blocks are released from limitation, so that the filter holes in the upper filter plate and the lower filter plate are cleaned. At the moment, the elastic piece rebounds, so that the upper filter plate and the lower filter plate return to original positions, the upper filter plate and the lower filter plate shake in the process, the coal cinder blocked in the filter holes can penetrate through the filter holes to continue to fall down, the coal cinder is further effectively prevented from blocking the filter holes in cooperation with cleaning of a cleaning brush, and the situation that the filter holes are blocked to affect penetration of other coal cinder is effectively avoided; therefore, the separation effect is improved.

The invention is applicable to the technical field of decorative films, and provides a high-weather-resistance decorative film and a processing system, the high-weather-resistance decorative film comprises a first polyvinyl chloride base film, a thermoplastic resin layer and a second polyvinyl chloride base film; an ink layer is printed on the surface of the first polyvinyl chloride base film; according to the decorative film, the ink layer is printed on the surface of the first polyvinyl chloride base film, so that the simulation texture of the decorative film is improved, and the variety of materials suitable for covering and pasting is widened; through the arrangement of the net-shaped woven reinforcing layer, the deformation resistance of the decorative film is improved, the bottom face of the second polyvinyl chloride base film is coated with the polyurethane resin chemical separation layer, and when a roll product is opened, the front face and the back face of the decorative film do not adhere to each other; through linkage cooperation of all the components, synchronous hot-press gluing operation of the upper film part, the thermoplastic resin layer and the lower film part is achieved, and the operation procedure is optimized.

The invention relates to a coarse helium purification and liquefaction circulation system and method based on low-temperature rectification, and relates to the technical field of low-temperature refrigeration and the technical field of chemical separation. The system comprises a crude helium liquefying unit, a pure helium circulating liquefying unit and a cooling capacity providing unit. The crude helium liquefying unit comprises a crude helium pipeline, a 77K low-temperature adsorber, a multi-stage turbo expander, a multi-stage heat exchanger, a gas-liquid separator, a 20K adsorber, a throttle valve and a liquid helium tank, and is used for liquefying and purifying crude helium; the pure helium circulating liquefaction unit comprises a pure helium pipeline, a multi-stage turbo expander, a reflux compressor, a throttle valve and the like, and is used for liquefying refluxed pure helium; the heat exchange unit comprises a liquid nitrogen pipeline, a backflow pipeline, a multi-stage heat exchanger and the like and is used for providing cooling capacity. By adopting the technical scheme of purifying and liquefying the crude helium and refluxing and liquefying the pure helium, the crude helium extracted from the natural gas through low-temperature condensation can be purified and then liquefied, the energy consumption is low, the operation temperature is flexible, the recovery rate is high, and the low-temperature rectified crude helium can be directly treated.

The invention discloses a method for efficiently extracting phenol from coal tar and primarily separating crude phenol oil, and relates to the technical field of chemical separation. Carrying out multi-stage cross-flow or counter-flow extraction on the extracting agent and the coal tar to obtain a raffinate phase and a high-concentration extraction phase; and mixing the raffinate with condensate at the top of the regeneration device and supplemented fresh water, and recovering residual organic amine through a reverse extraction device to obtain a dephenolized oil product and backwashing water. Mixing and diluting the extract phase with backwashing water, and standing for phase splitting to obtain a high-grade crude phenol oil phase and a low-concentration extract phase; the low-concentration extraction phase absorbs CO2 in the industrial tail gas for acidification to obtain a low-grade crude phenol oil phase and an amine salt aqueous solution; and desorbing the amine salt aqueous solution to obtain a regenerated extraction agent (circularly used for extraction), tower top condensate (circularly used for reverse extraction) and water-containing industrial-grade CO2 gas (recycled or sealed after drying). According to the method, high-efficiency extraction of the phenolic compounds in the coal tar and primary separation of crude carbolic oil are realized by utilizing the extraction performance differences of extraction capacities, selectivity and the like of the extraction agents with different concentrations on the phenolic compounds, and the production economy is improved.

The invention discloses a self-balancing multiphase self-shunting device and a control method, and belongs to the technical field of chemical separation. The device comprises an automatic split-phase tank (1), a pressure display A (2), a system pressure automatic controller (3), a light phase collecting tank (4), a liquid discharge valve A (5), a pressure display B (6), a material inlet (7), a light phase overflow port (8), a heavy phase extraction port (9), a split-phase internal component (10), a liquid discharge valve C (11), a heavy phase extraction automatic regulating valve (12), a heavy phase collecting tank (13) and the like. The device is simple in structure and control method, can be operated at normal pressure or under pressure, is high in operation elasticity, realizes self-balance of the liquid level height by utilizing the light phase overflow port (8), realizes rapid phase separation of light and heavy components by adopting a special structure of the phase separation inner component (10), forms a stable phase interface, is good in separation effect, and is suitable for industrial production. The method can be used for chemical unit operations such as extraction separation, reaction separation and rectification.

The invention relates to the technical field of chemical separation, and discloses an isomerization system and process for 1-butene in etherified C4. Comprising an isomerization reactor, a coalescer, a heat exchanger, a static mixer and a filter, an inlet of the coalescer is connected with an etherified C4 pipeline, an outlet pipeline of the coalescer penetrates through the heat exchanger to be connected with an inlet of the static mixer, the inlet of the static mixer is further connected with a hydrogen pipeline, and an outlet of the static mixer is connected with an inlet of the isomerization reactor. An isomerization reactor outlet is connected with a filter inlet, and a filter outlet pipeline enters the isobutane separation tower. According to the method, 1-butene in etherified C4 is isomerized, and after 1-butene is isomerized into 2-butene by utilizing the relatively small relative volatility of 1-butene and iso-butane and the relatively large relative volatility of 2-butene and iso-butane, the content of 1-butene in the raw material is reduced, the separation difficulty of iso-butane is reduced, and iso-butane with the same purity is obtained; the reflux ratio of the isobutane separation tower can be reduced, and the purpose of saving energy is achieved.

The present invention discloses a method for extracting phenolic compounds from coal tar in stages, which relates to the technical field of chemical separation. The method comprises the following steps: extractant II is mixed with coal tar through an extraction device to obtain coal tar I and extraction phase II; the extraction phase II is sequentially subjected to deep acidification with CO2 and oil-water separation to obtain a low-grade crude phenol oil product and aqueous phase II; the aqueous phase II enters a regeneration device for regeneration by heating, the obtained CO2 gas is recycled to the deep acidification device, and the regenerated extractant is mixed with supplemented fresh extractant to serve as extractant I. Extractant I is mixed with coal tar I through an extraction device to obtain extraction phase I and a dephenolized oil product; the extraction phase I is subjected to acidification and oil-water separation to obtain extractant II and a high-grade crude phenol oil. The present invention utilizes the selectivity difference of different extractants for different types of phenolic compounds in coal tar to realize the efficient extraction of phenolic compounds in coal tar and the preliminary separation of crude phenol oil, and significantly reduces the cost of subsequent treatment of dephenolized oil and crude phenol oil.

Described is a computer-implemented method for modeling an equilibrium separation in a chemical separator. The method can include representing a feedstock of the chemical separator as a collection of molecules, each molecule having a mole fraction. A cluster analysis is performed on the feedstock based on a property of the collection of molecules to generate thermodynamic lumps. A mapping identity table is generated that identifies each molecule of the collection of molecules in the feedstock. A simulation of a chemical separation of the thermodynamic lumps is performed. The mole fraction of molecules in a resultant first phase and the mole fraction of molecules in a resultant second phase is determined.

The invention belongs to the technical field of chemical separation, and relates to a bionic on-demand emulsion separation membrane which is formed by compounding a normal beetle wettability fiber layer and an anti-beetle wettability fiber layer, and the two layers form a stable laminated structure through mechanical entanglement of fibers, the thickness of the normal beetle wettability fiber layer and the thickness of the anti-beetle wettability fiber layer are both 0.2-500 micrometers, and the thickness ratio of the normal beetle wettability fiber layer to the anti-beetle wettability fiber layer is 1: 0.2-5. The invention also discloses a preparation method of the bionic on-demand emulsion separation membrane. According to the invention, bionic design and asymmetric wettability technology are utilized to realize high-efficiency treatment of oil-containing wastewater. The method has the advantages that the separation effect is improved by a bionic synergistic demulsification mechanism; multiple types of emulsions are efficiently separated, energy consumption is low, and external stimulation is not needed; the bionic synergistic demulsification mechanism based on positive beetle wettability and anti-beetle wettability is achieved, the separation effect is remarkably improved, the advantage of performance integration is achieved, and efficient on-demand separation of water-in-oil emulsion and oil-in-water emulsion through a single membrane material is achieved.

The invention discloses a PC-SAFT state equation solving method and a related device, and relates to the technical field of chemical separation simulation calculation, random valuing is carried out in an initial value range of a filling score of a target substance to obtain a first value of the filling score, a first compression factor is further calculated by using a PC-SAFT state equation, and a second value of the filling score is calculated by using a PC-SAFT state equation to obtain a second compression factor; calculating by utilizing a relational expression between the pressure and the compression factor to obtain a first calculation pressure, judging whether an iteration termination condition is met or not, if not, determining a second value of the filling score by combining an inverse quadratic interpolation method, a secant method and a dichotomy, updating the filling score until the iteration termination condition is met, determining the compression factor corresponding to the target substance, and determining the compression factor corresponding to the target substance; the combination of different solving algorithms can improve the success rate and efficiency of PC-SAFT state equation solving.

The invention relates to the technical field of chemical separation and purification, and discloses a method for separation and purification of taxadiene from tobacco and GC-MSMS quantitative detection.The method for separation and purification of taxadiene from tobacco comprises the following steps that S1, tobacco leaves are made into powder, an extracting agent is added, ultrasonic extraction is conducted for multiple times, and extract liquor is obtained; s2, evaporating the extract to dryness, adding an organic solvent, and dissolving to form a concentrated solution; s3, the concentrated solution is added into a silica gel column for gradient elution, and an extraction sample is obtained; and S4, evaporating the extracted sample to dryness, adding acetonitrile for dissolving, and carrying out secondary recrystallization to obtain purified taxadiene. According to the method, the efficiency and purity of separating the taxadiene from the tobacco are improved, and the taxadiene is accurately quantified.

The invention discloses a rare earth concentrate chemical separation wastewater treatment method, which comprises: 1) adding an alkaline agent I and a precipitate I into rare earth concentrate chemical separation wastewater, and carrying out a reaction to obtain lead slag and a lead-removed supernatant; (2) adding a calcium agent, an alkaline agent II and a flocculating agent into the lead-removed supernatant to react, so as to obtain fluorine residues and fluorine-removed supernatant; (3) electrolyzing the fluorine-removed supernate to obtain iron slag and iron-removed supernate; 4) adding phosphate and a precipitant II into the iron-removed supernate for reaction to obtain phosphate precipitate of rare earth elements and rare earth-removed supernate; 5) carrying out evaporation concentration on the rare earth-removed supernatant to obtain an evaporation concentrated solution; and cooling the evaporated concentrated solution, and carrying out solid-liquid separation to obtain a CaCl2. 2H2O crystal and a mother solution. The lead element, the fluorine element, the iron element, the rare earth element and the calcium element in the rare earth ore concentrate chemical separation wastewater can be directionally separated and recycled step by step, and cross interference among the elements is avoided.

The invention belongs to the technical field of recycling of waste water in rare earth smelting, and particularly relates to a method for recycling calcium fluoride and rare earth through chemical separation waste water in rare earth smelting. The method for recovering calcium fluoride and rare earth by utilizing chemical separation wastewater of rare earth smelting comprises the following steps: a stage of extracting calcium fluoride to prepare defluorinated rare earth supernatant: dropwise adding alkaline washing water into the chemical separation wastewater in a stirring state until the pH value is 1.5-4.5, keeping stable, keeping stirring and aging for 30-60 minutes, and performing solid-liquid separation to obtain the defluorinated rare earth supernatant; the obtained liquid is defluorinated rare earth supernatant, and washing and drying the obtained solid filter cake to obtain a calcium fluoride byproduct; recovering rare earth from defluorinated rare earth supernatant; a saturated organic phase extraction rare earth reverse extraction stage; and a rare earth chloride feed liquid purification stage. According to the method for recycling calcium fluoride and rare earth through chemical separation waste water generated by rare earth smelting, the rare earth recycling rate is high, the yield and purity of the byproduct calcium fluoride are high, waste of rare earth resources is reduced, and operation is easy.

A waste extraction system that includes a column set positioned between and fluidly coupled to an upstream segment of a main waste pathway and a column effluent tank, the column set having a uranium adsorption column fluidly coupled to a supporting adsorption column along the main waste pathway. The uranium adsorption column is upstream the supporting adsorption column. The waste extraction system also includes a strip waste pathway extending from the uranium adsorption column to the column effluent tank bypassing the supporting adsorption column, an anion exchange resin housed in the uranium adsorption column, and a cation exchange resin housed in the supporting adsorption column.

The invention discloses a wet electronic chemical separation and purification device, and particularly relates to the technical field of wet electronic chemicals, the wet electronic chemical separation and purification device comprises a transmission base, the top of the transmission base is fixedly connected with a storage bin, and the front and rear sides of the right side of the transmission base are fixedly connected with separation and purification seats respectively; by arranging the separation and purification base, the vertical plate, the push-pull plate, the filtering bin, the storage bin and the test tube rotary table, automatic and continuous treatment of raw materials is achieved, the raw materials can fully react in the purification treatment process through the design of the separation and purification base, the raw materials can be fully separated, and the raw materials can be fully purified. The purification efficiency and effect are improved, due to the structural design of a vertical plate and a push-pull plate, operation is more convenient, meanwhile, the safety of the equipment is guaranteed, and the problem that due to the fact that sodium sulfate and wet electronic chemicals cannot be well fused, the sodium sulfate and the wet electronic chemicals can be fused insufficiently, and the preliminary passivation effect is affected is solved.

Embodiments relate to processing materials in recycling of used solar panels. A used solar panel may comprise components manufactured from materials of high purity, that are expensive to prepare from scratch. Examples of such high purity materials can include but are not limited to: metals (silver; copper; tin; lead), photovoltaic material (e.g., precisely doped crystalline silicon; CdTe), and optically transparent materials (e.g., optical glass; plastics). Accordingly, embodiments recover one or more high purity materials from a starting material pre-processed from a used solar module, by using a recycling process comprising multiple successive separation events. Such events can include, but are not limited to: chemical separation (leaching, filtration, precipitation), physical separation (e.g., shredding / sieving), thermal separation (e.g., furnace heating), and / or electrical separation (e.g., electrowinning, electrostatic). Various fractions separated during the recycling process flow, are enriched in valuable materials and hence available for reuse at lower cost relative to materials prepared from scratch.

The invention provides a rectifying tower control method, terminal equipment and a readable storage medium, and belongs to the technical field of chemical separation, the control method comprises the following steps: determining a control variable and a controlled variable in a current working state based on a comparison result of a current measured value of a working parameter of a rectifying tower and a target range; when it is determined that a difference exists between the current measured value of the control variable and the target range of the control variable, a target adjustment value of the controlled variable is determined based on a PID algorithm; and adjusting the rectifying tower according to the target adjusting value of the controlled variable. Wherein the control variable is at least one of the working parameters of the rectifying tower, and the controlled variable is at least one of the tower bottom steam valve opening degree, the inlet valve opening degree of the rectifying tower, the power of a stripping section heat preservation sleeve, the power of a rectifying section heat preservation sleeve and the reflux ratio of the rectifying tower. Through the method provided by the invention, the accurate rectifying tower adjusting effect can be achieved, the control flow of the rectifying tower is obviously optimized, the working efficiency is improved, and the operation cost is reduced.

The embodiment of the invention provides an extractive distillation system, a control method and an extractive distillation process, and belongs to the technical field of chemical separation and purification. The extractive distillation system comprises an extractive distillation tower, a first condenser, a first reboiler, a first reflux tank, an extraction agent recovery tower, a second condenser, a second reboiler, a second reflux tank, a raw material preheater, a plurality of regulating valves, a plurality of material conveying pumps and control equipment, the control equipment comprises a first pressure controller, a second pressure controller, a first reflux tank liquid level controller, a first reboiler liquid level controller, a second reflux tank liquid level controller, a second reboiler liquid level controller, a first reflux ratio controller, a first cascade control loop and a second cascade control loop, a third cascade control loop and a fourth cascade control loop. The extractive distillation system has the technical effect of improving the purity of the obtained product.

The application discloses a kind of metal organic framework materials and preparation method and application thereof, belong to chemical separation technical field.The preparation method of metal organic framework material provided in the application includes the following steps: with water and methanol as solvent, with 4,4 '-dipyridyl and malic acid as organic ligand, zinc source is added, and reaction is carried out, in the reaction process, oxygen atom on malic acid is connected with zinc ion on zinc source to form 2D layered network structure, 2D layered network structure is bridged by 4,4 '-dipyridyl to form 3D rigid network framework, after reaction, metal organic framework material is prepared.The metal organic framework prepared by the application has super strong capture effect and large storage space for acetylene molecules, and also has excellent separation effect on acetylene carbon dioxide mixed system, to achieve the purpose of high-purity, high-yield acetylene purification in acetylene carbon dioxide mixture.