235 results about "Chemical separation" patented technology

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 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.

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 relates to the technical field of chemical separation equipment, in particular to a graded pore foamed ceramic filler, a separation tower and a preparation method. The invention provides a separation tower, grade hole foam filler is used, the filler is prepared through a 3D printing process, the separation tower comprises a filler body, and the filler body is provided with fine holes and coarse holes; the aperture ratio of the thick holes to the thin holes is 2-5, and the volume ratio of the thin holes to the thick holes is 0.3-0.6. The invention aims to solve the technical problem that the flux and the mass transfer area cannot be balanced by a single aperture in the prior art.

The invention discloses an MDEA solution thermal regeneration and hydrogen sulfide analysis system and process method, and belongs to the technical field of gas purification and chemical separation. The system comprises a regeneration tower, a kettle type reboiler, a condensate tank and a gas phase balance pipeline, an oil collector is arranged at the bottom of the regeneration tower, and the shell pass liquid level of a kettle type reboiler is controlled by LT2 to be always higher than the top of a heat exchange tube bundle, so that full-immersion corrosion prevention is realized; steam condensate enters the condensate tank through the first condensate outlet pipeline, and the pressure in the condensate tank is synchronous with that of the steam inlet pipeline through the gas phase balance pipeline, so that the condensate is automatically discharged without a pump; and when the gas phase outlet temperature TE2 is smaller than or equal to 125 DEG C and the steam pressure PT1 after pressure reduction is larger than 0.4 MPa, steam is cut off in an interlocking mode, and MDEA thermal decomposition is prevented. The service life, the operation safety and the operation reliability of equipment are remarkably improved.

The present application belongs to the technical field of water treatment, and relates to a heat-sensitive color developing agent F-103 production wastewater treatment method. The present application performs multistage treatment on the wastewater. First, an alkaline chemical separation reaction is performed on the wastewater to remove part of the acidic polar organic matter 3-p-tolylsulfonylureido phenol, p-toluenesulfonic acid and the like in the water. Then, an acid chemical separation reaction is performed to further remove the alkaline polar organic matter intermediate MAPOTs and the like in the water. Subsequently, an adsorption reaction is performed using activated carbon to further remove the organic matter and inorganic impurities in the water. Finally, evaporation and concentration are performed to recover the salt sodium chloride. The wastewater treatment of the present application recovers the salt sodium chloride in the wastewater as a resource under the premise of solving the toxicity problem of the organic matter in the wastewater, and realizes the harmless treatment and the reduction of hazardous waste of the wastewater.

The application discloses a kind of high olefin dry dehydration bed regeneration and cryogenic recovery process, belong to chemical separation and purification technical field, the process includes six steps of bed emptying, cold inert medium purging, heating desorption, staged cryogenic condensation recovery, bed cooling, pressure charging standby in sequence, maximum recovery free olefin by pre-emptying and purging step, inhibit high temperature polymerization, core uses staged cryogenic condensation recovery process to olefin component in desorption gas is condensed and recovered gradually, the loss problem of olefin material direct discharge flare in traditional process is solved, effectively inhibit olefin polymerization, by pre-cold inert medium purging step, remove the free olefin remaining in bed, cooperate with desorption temperature control and oxygen-free inert atmosphere throughout, avoid the occurrence of olefin polymerization reaction under high temperature condition, prevent the damage of green oil generation to adsorbent and equipment.

The application discloses an adsorbent for removing trace metal ions in alcohol ether solvents and a preparation method and application thereof, and belongs to the field of chemical separation technology. The adsorbent is a zirconium-based metal organic cage material with discrete structure formed by coordination self-assembly of a zirconium metal salt and a nitrogen-containing polycarboxylic acid organic ligand. The adsorbent has specific ion nanowells, and can form a strong limited synergistic effect with metal ions. The adsorbent is suitable for adsorption and separation of trace metal ions in various alcohol ether solvents, and has high metal ion adsorption and removal efficiency.

The application belongs to the technical field of chemical separation materials, and relates to a preparation method of a sulfonated polythiophene modified nitrogen-doped honeycomb carbon and Co9S8 composite microsphere integrated flow electrode, which comprises the following steps: taking chitosan as a carbon source and a nitrogen source, adding a cobalt source and a sulfur source, performing cross-linking aging, forming and curing, performing freeze drying and high-temperature carbonization, and obtaining chitosan derived nitrogen-doped honeycomb carbon and Co9S8 composite microspheres; taking thiophene and 3-sulfonic acid thiophene as monomers, coating a sulfonated polythiophene film on the surface of the composite microspheres through chemical polymerization, and obtaining the integrated flow electrode. The high specific capacitance electrode material and the conductive ion exchange membrane function are combined into one, the specific capacitance, the hydrophilicity and the ion selective permeability are significantly improved, the integrated flow electrode is used for deionization technology treatment of uranium-containing wastewater, the uranium removal rate is high, the electric adsorption capacity is large, the balance time is short, the device is simplified, and the application prospect is wide.

The invention relates to the technical field of chemical separation, in particular to a three-dimensional flexible metal organic framework material and a preparation method and application thereof. The structural general formula of the metal organic framework material is A (TIB) 2, A is a transition metal cation, and TIB is 1, 3, 5-tri (1H-imidazole-1-yl) benzene. Transition metal cations and TIB are self-assembled in an octahedral hexa-coordination mode to form a two-dimensional layered frame, and the two-dimensional layered frame is further stacked to form a three-dimensional flexible structure. The material has a two-dimensional layered skeleton with high stability and a pore surface with a partial electrostatic potential, not only shows a strong capture capability on carbon dioxide, but also provides a suitable storage space for acetylene, can selectively adsorb and separate an acetylene / carbon dioxide / ethylene mixed system, and realizes one-step purification of ethylene from a ternary mixture. In addition, due to excellent cyclic regeneration performance, solvent stability and thermal stability, the adsorbent is expected to be an efficient adsorbent applied to industrial adsorption separation.

The invention discloses a hydrosolvent distillation, compression and separation device, which belongs to the technical field of chemical separation and comprises a reaction kettle, a gas-liquid separator, a low-pressure balance tank, a high-pressure balance tank, a low-pressure steam purification filter, a steam compressor, a steam boiler, an electric cabinet and a condensed water heat recoverer. The steam compressor sucks steam of a water solvent, reduces pressure in the reaction kettle and promotes evaporation of the water solvent in the reaction kettle, the steam compressor compresses the steam of the water solvent into high-temperature and high-pressure steam to enter a heating layer of the reaction kettle, and extract and a solvent in the reaction kettle are condensed into liquid to flow out while being heated; the energy consumption of the device is 20% of the energy consumption of a distillation cooling device, and compared with the distillation cooling device, the energy consumption can be reduced by 80%.

The invention discloses a vertical gas-liquid two-phase fluid uniform distribution device and a uniform distribution method thereof, and relates to the technical field of chemical separation equipment. The device comprises a device shell, a cyclone flow guide mechanism, a multi-stage reducing flow guide mechanism and an umbrella-shaped reflecting and converging mechanism, the cyclone flow guide mechanism, the multi-stage reducing flow guide mechanism and the umbrella-shaped reflecting and converging mechanism are sequentially fixed in the device shell from top to bottom, and the multi-stage reducing flow guide mechanism comprises a first-stage distribution plate, a second-stage distribution plate and a third-stage distribution plate; first-stage distribution holes are uniformly distributed in the first-stage distribution plate, second-stage distribution holes are uniformly distributed in the second-stage distribution plate, third-stage distribution holes are uniformly distributed in the third-stage distribution plate, a mounting groove is formed in the bottom of each third-stage distribution hole, and a valve element assembly is fixed in each mounting groove. Through the multi-stage synergistic effect, the technical problems that an existing distributor is insufficient in radial mixing, poor in operation elasticity, prone to blockage, serious in wall flow phenomenon and the like are effectively solved, and efficient, stable and uniform distribution under all working conditions is achieved.

A system and method for chemical process simulation integrates thermodynamic models into machine learning frameworks to enhance predictive accuracy and optimize chemical separation processes. The system employs a variety of methods, such as using a physics- informed neural network (PINN)-like approach and methods that embed thermodynamic equations directly into the architecture, ensuring adherence to physical laws such as conservation of energy and mass. Additionally, experimental data, virtual sampling points derived from thermodynamic models, and auxiliary predictions capturing interdependencies between physical and chemical variables are combined into an augmented dataset for training. A hybrid loss function balances contributions from experimental data and thermodynamic insights, dynamically adjusted via a scaling hyperparameter. The system predicts target properties, such as adsorption efficiency, under diverse operating conditions while maintaining compliance with thermodynamic constraints.

The utility model relates to chemical separation technical field, concretely is a kind of kettle type distillation device, it includes kettle body, T groove and bolt, the top of kettle body is detachably connected with kettle cover, the inner chamber of kettle body is provided with heating cavity, the top of kettle cover is fixedly installed with motor, the output of motor is fixedly connected with stirring rod, the outside of stirring vane is provided with dismounting mechanism, and the inner chamber of dismounting mechanism is provided with heating mechanism, T groove, sliding slot, sliding base, spring, screw hole, jack, connecting piece, insert block, T piece and collar, the kettle type distillation device, by setting dismounting mechanism, it is detachable connection structure between stirring vane and stirring rod, to facilitate the separate dismounting and cleaning of stirring vane, by setting heating mechanism, electric heating tube and heat conduction plate cooperate to heat stirring vane, then the stirring vane of rotation and heated state effectively improves the heating uniformity when material to be distilled is stirred.

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 belongs to the technical field of chemical separation, and discloses a two-stage low-temperature condensation coupling compression separation high-purity hydrogen sulfide purification process and system. The system consists of a two-stage low-temperature condensation unit, a hydrogen sulfide compression unit and a hydrogen sulfide collection unit, the two-stage low-temperature condensation unit comprises a hydrogen sulfide liquid separation tank, a hydrogen sulfide low-temperature cooler, a hydrogen sulfide low-temperature liquid separation tank, a hydrogen sulfide heat exchanger and a hydrogen sulfide saline water liquid separation tank. Hydrogen sulfide raw material gas containing carbon disulfide impurities is sequentially introduced into a two-stage low-temperature condensation unit, carbon disulfide is liquefied and separated out preferentially, low-temperature water is adopted in the first stage, and materials subjected to cryogenic compression throttling are adopted in the second stage for heat exchange; pressurizing and compressing the primarily purified hydrogen sulfide gas-phase component, and then condensing and separating to remove trace carbon disulfide and recover cold energy, thereby finally obtaining the high-purity hydrogen sulfide with the purity of more than or equal to 99.95%. According to the invention, a low-temperature two-stage low-temperature condensation-pressurized compression condensation coupling separation technology is adopted, and deep removal of carbon disulfide is realized under the condition that a third component is not introduced.

This invention relates to a method for the liquid-phase adsorption separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene, belonging to the field of chemical separation. This method for the simultaneous separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene involves preparing small spherical molecular sieve adsorbents from USY molecular sieves, silicon coupling agent-modified illite, and biomass polysaccharides, which are then loaded into a countercurrent simulated moving bed for separation and purification. This method can simultaneously obtain 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene with a purity ≥99%. The separation and purification method adopted in this invention is not only energy-efficient and highly effective, but also enables continuous production of two high-purity dichloronitrobenzenes, possessing significant industrial application value.

The utility model relates to the technical field of chemical separation, and discloses a boron trifluoride methyl ether complex feeding distributor of a rectifying tower, which comprises a tower body, an air vent is arranged at the top of the tower body, a fixing component is mounted in the tower body, and a distribution component is mounted in the tower body; the fixing assembly comprises a fixing block, the fixing block is fixedly connected to the interior of the tower body, a fixing frame is placed on the top of the fixing block, a limiting block is fixedly connected to the exterior of the fixing frame, a clamping column is slidably connected to the middle of the limiting block, a clamping groove is formed in the middle of the fixing block, and the clamping groove is connected with the clamping column in a clamped mode. The periphery of the clamping column is sleeved with a spring. According to the utility model, the fixing of the distribution assembly can be quickly completed through the matching of the clamping columns and the clamping grooves; and during maintenance, the device can be easily detached for inspection, maintenance or component replacement.

The application discloses a high-water-content liquid hazardous waste resourceization and collaborative treatment system and method, and belongs to the technical field of hazardous waste treatment and environmental protection. The system is composed of five units, i.e. hazardous waste receiving and pretreatment, physical and chemical separation, anti-seepage ecological assimilation plant planting, material collaborative treatment and intelligent closed-loop control. For liquid hazardous waste with a water content of 80% or more, oil, water and mud are separated through pretreatment, demulsification, flocculation, precipitation, precision filtration and oxidation treatment. The qualified water is sent to the planting unit to be assimilated by plants, achieving zero leakage, zero external discharge and no pipe connection. The oil phase, sludge solid and mature plants are incinerated in a kiln, heavy metals are solidified in clinker, and flue gas is discharged in a standard way. The application combines resources and ecological assimilation, reduces the pain point of "water burning in the kiln" from the principle point of view, greatly reduces the heat consumption and cost of current high-water-content hazardous waste direct-injection kiln incineration treatment, improves the clinker production capacity and quality, and forms a full-closed-loop resourceization without pollutant leakage.

The invention discloses an ethyl ester rectifying tower butyl ester recovery system and method with side-draw in the field of chemical separation, and the system comprises an ethyl ester rectifying tower body which is provided with 13-17 theoretical plates; the side-line extraction system comprises side-line extraction ports formed in the 13th to 17th theoretical plates of the ethyl ester rectifying tower body, side-line extraction pumps connected with the side-line extraction ports, side-line extraction flow meters mounted on an extraction pipeline, side-line extraction automatic regulating valves and an online gas chromatograph. The problems that a traditional ethyl ester rectification system is high in butyl ester circulation consumption, large in steam energy consumption and high in wastewater organic matter content are solved, the butyl ester unit consumption can be reduced by 0.15-0.25 ton per ton of products, the steam consumption is reduced by 18-22%, the tower top ethyl ester purity reaches 99.92% or above, the wastewater organic matter content is reduced by 30-40%, and the payback period is 8-12 months.

The utility model discloses a chemical separation device convenient to clean, which comprises a separation tank, a separation mesh barrel is rotatably connected in the separation tank, a plurality of blades are fixedly connected in the separation mesh barrel, and the chemical separation device further comprises a power mechanism, a feeding mechanism and a self-cleaning mechanism. The feeding mechanism can input materials to be separated into the separation net barrel, the power mechanism can drive the separation net barrel to rotate, so that the separation net barrel can drive the materials to turn over and be separated, and the blades fixed in the separation net barrel can push the separated solid materials to be output. And finally, an arranged self-cleaning mechanism can automatically clean the interior of the separation net barrel, the structure is reasonable, automatic feeding and separation of the materials are facilitated, and meanwhile automatic cleaning is facilitated.

The invention belongs to the technical field of environmental engineering and chemical separation, and particularly relates to a deep-eutectic solvent composition for efficiently extracting phenolic compounds and a preparation method of the deep-eutectic solvent composition. The deep-eutectic solvent composition for efficiently extracting the phenolic compounds, provided by the invention, consists of a hydrogen bond acceptor and a hydrogen bond donor in a molar ratio of (1-2): (1-9), the hydrogen bond donor comprises n-caprylic acid or n-hexyl alcohol; the hydrogen bond receptor comprises 1-ethyl-3-methylimidazole chloride or tetrabutylammonium bromide. The eutectic solvent composition has the advantages of high partition coefficient, low viscosity, high selectivity, rapid phase separation, environmental friendliness and the like, can efficiently extract phenol, resorcinol, o-cresol, m-cresol and p-cresol, and has single-stage extraction efficiency gt; the regeneration rate is high, and the method is suitable for high-concentration phenolic wastewater, polyhydroxy phenolic wastewater, continuous process and low-toxicity emission requirement scenes.

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.

A static fractional crystallization, separation and purification method for an antioxidant 1076 belongs to a chemical separation and purification technology, takes temperature range accurate regulation and control-crystal growth directional guide-impurity stepped removal as a core, and comprises the steps of stepped pre-cooling, melting memory elimination, gradient cooling crystallization, gradient heat preservation crystal growing, staged sweating and melting discharging. By adopting a process of dynamically adapting the purity of a crude product and adapting to conventional static crystallization equipment, oriented growth of the antioxidant 1076 crystal and efficient removal of impurities can be realized, and the product is high in purity, high in yield, low in energy consumption, free of solvent residues and suitable for industrial large-scale production.

The invention belongs to the technical field of chemical separation and purification, and particularly relates to a purification process of trimethylamine. The invention aims to solve the problem of insufficient purity of the current trimethylamine product, especially the technical problems that the content of monomethylamine and dimethylamine exceeds the standard and the peculiar smell is obvious. Mesoporous silica gel subjected to sulfonyl chloride derivative surface functionalization modification is used as a selective adsorbent and is subjected to a contact reaction with a raw material trimethylamine, and monomethylamine and dimethylamine impurities are selectively removed; then carrying out catalytic hydrogenation on trimethylamine and a small amount of hydrogen together through a loaded metal catalyst, so that oxides in trimethylamine are reduced into trimethylamine and water; and finally, carrying out deep dehydration and purification on the product by using a high-hydrophilicity membrane by adopting a pervaporation membrane separation technology to obtain a high-purity trimethylamine product.

The invention discloses an algorithm for desorbing polyphenol by a fixed bed, which belongs to the technical field of chemical separation and comprises the following steps: S1, mixing activated filler and a crude polyphenol solution according to a material-liquid ratio of 1: (200-500), and completing adsorption in a shaking table or the fixed bed to obtain a first solution; wherein the filler is macroporous resin or a plant cell wall material; s2, filling the first solution into a fixed bed, introducing distilled water of 2-3 column bed volumes at the flow speed of 1.0-3.0 mL / min, and compacting a filler in a bed layer; s3, carrying out elution by adopting an elution solution at the flow speed of 1.0 to 3.0 mL / min; and S4, calculating the desorption amount. According to the method, the filler radius is used as the reference length, the filler internal diffusion equation is subjected to dimensionless processing, the scale difference between the monolithic column bed and filler particles is effectively eliminated, physical phenomena occurring in different spaces are described in the same coordinate system, and the accuracy of the method is improved. Coupling description of mainstream convection-dispersion and in-particle diffusion is realized in a unified model, and the blank that an existing fixed bed desorption model cannot accurately describe the desorption process is filled.

This invention relates to a control method and system for an acetaldehyde distillation column, belonging to the field of chemical separation technology. It includes acquiring tray numbers, anhydrous copper sulfate test paper numbers, and detection time; responding to a moisture content detection signal, controlling the anhydrous copper sulfate test paper corresponding to each test paper number to perform detection according to the detection time; acquiring test paper images of the anhydrous copper sulfate test paper corresponding to each test paper number; analyzing the test paper images to obtain color values, and extracting depth values ​​from the color values; selecting high-purity anhydrous copper sulfate test paper numbers with depth values ​​less than a preset depth threshold, and generating high-purity anhydrous copper sulfate test paper number groups based on these numbers; obtaining corresponding tray number groups based on the high-purity anhydrous copper sulfate test paper number groups; and controlling the trays corresponding to the tray number groups to be stored according to a storage mode. This invention improves the production efficiency of acetaldehyde.

The invention belongs to the technical field of chemical separation, and discloses a separation method of a high-boiling-point component in high-carbon aldehyde production. The method is characterized in that 0.05%-2.0% of functional ionic liquid is added into a rectification system, and the apparent vapor pressure of impurities is directionally inhibited and the relative volatility is remarkably improved by utilizing the selective hydrogen-bond interaction between anions of the functional ionic liquid and hydroxyl / carbonyl in the impurities. According to the method, the ionic liquid with a molecular recognition function is introduced, the phase equilibrium relation between the high-carbon aldehyde and the high-boiling-point impurities is reconstructed from the thermodynamic essence level, the inherent limitation that traditional rectification depends on weak physical property differences is broken through, efficient, low-energy-consumption and high-stability purification of the high-carbon aldehyde product is achieved, the ionic liquid can be recycled, and the method is suitable for industrial production. The invention provides a novel high-carbon aldehyde purification method which has the advantages of novel principle, simplicity and convenience in operation, high efficiency, energy conservation and industrial feasibility.

The application belongs to the field of chemical separation and functional materials, and provides an industrial hemp metabolite extraction method based on dynamic borate reversible reaction. The application adopts a core-shell mesoporous functional adsorbent design. The adsorbent comprises a mesoporous silica core and an organic shell layer containing a pincer-type double-boron recognition cavity. The distance from boron to the boron center is 0.32-0.50 nm. The selective adsorption of ortho-diphenol type industrial hemp metabolites is realized under the condition that the volume fraction of ethanol is 85-96 vol%, and the temperature is 30-40 DEG C. The borate bond is reversibly broken by reducing the acidity and / or introducing a glycol competitive agent to complete mild desorption, realizing the performance of a selectivity coefficient of greater than or equal to 100, a recovery rate of greater than or equal to 95%, an activity retention rate of greater than or equal to 90% after 100-200 cycles, and a boron leaching amount of less than or equal to 1 ppm. The triple contradiction between the shell layer cross-linking and recognition cavity accessibility, high liquid hourly space velocity and ethanol-water microenvironment regulation, mild regeneration and site chemical integrity is solved, and the application has wide application value.