80results about How to "Highly selective adsorption" patented technology

The method comprises the following steps: (1) putting 1-vinyl imidazole into a flask containing N, N-dimethylformamide and D314 type resin, adding an initiator, carrying out a grafting reaction under the action of the initiator, and obtaining imidazolyl anion exchange resin after the reaction is finished; (2) pre-treating the imidazolyl anion exchange resin, and then adsorbing a rhenium-containing solution to be treated by adopting the pre-treated imidazolyl anion exchange resin; and (3) washing the imidazolyl anion exchange resin subjected to saturated adsorption in the step (2) by using ultrapure water, and then analyzing by using ammonia water to obtain a high-purity rhenium-containing solution. According to the method, the imidazolyl anion exchange resin is synthesized, the imidazolyl anion exchange resin has excellent selective adsorption capacity on rhenate ions, and efficient separation of rhenium and other impurities can be achieved when the imidazolyl anion exchange resin is applied to the rhenium-containing solution.

The invention relates to the technical field of wastewater treatment, in particular to a method for cooperatively treating petrochemical wastewater based on porous carbon and micro-nano bubbles, which comprises the following steps: S1, pretreating the petrochemical wastewater; s2, carrying out micro-nano aeration on the pretreated petrochemical wastewater by adopting a micro-nano bubble generation device to obtain aerated wastewater; s3, the aerated wastewater is subjected to adsorption treatment through modified porous carbon, purified wastewater is obtained, and the modified porous carbon is biomass porous carbon loaded with rose red ammonium tricarboxylate. According to the invention, through a cooperative treatment process of pretreatment, micro-nano bubble oxidation and modified porous carbon adsorption, efficient removal of multiple types of pollutants (including refractory organic matters, heavy metals and suspended particulate matters) is realized, the wastewater treatment efficiency is improved, and the operation cost is reduced.

The invention provides a modified porous chitosan gel bead, a preparation method thereof and application of the modified porous chitosan gel bead in cobalt-nickel separation, and belongs to the technical field of chitosan preparation. The preparation method comprises the following steps: firstly, modifying chitosan by using polyethylene glycol and glutaraldehyde to obtain a porous chitosan gel bead with a cross-linked structure, and then grafting by using epichlorohydrin, ethylenediamine and 2-chloromethylpyridine hydrochloride to obtain the modified porous chitosan gel bead containing an aminomethylpyridine functional group. The modified porous chitosan gel bead has excellent selective adsorption on nickel ions in a cobalt-nickel solution with the pH value range of 2-5, and nickel-cobalt separation can be achieved. In addition, the modified porous chitosan gel bead also has a good nickel-cobalt separation effect in a salt-containing system. The preparation method of the modified porous chitosan gel bead provided by the invention is simple in process, and the raw material chitosan is wide in source, non-toxic and environment-friendly.

The invention provides a carbon monoxide gas-sensitive material as well as a preparation method and application thereof, and belongs to the technical field of gas sensing. The structural formula of the carbon monoxide gas sensitive material is X2Wn-1O3n, X is cadmium or chromium, and n is 2, 3 or 4. The carbon monoxide gas-sensitive material has high sensitivity and selectivity, has good gas-sensitive performance on low-concentration carbon monoxide, reduces the power consumption of a carbon monoxide sensor, and can monitor carbon monoxide leakage for a long time.

The invention belongs to the technical field of electrode materials and nuclide recovery, and discloses a W18O49 / graphene / phosphorylation / amidoximation electrode material and preparation and application thereof. The preparation method comprises the following steps: dispersing ammonium tungstate and graphene in a trihydroxymethyl aminomethane solution, and heating and stirring for reaction to obtain a mixed solution; then adding dopamine hydrochloride, ethanol and ammonia water, stirring and reacting, and washing and drying a product to obtain a precursor; and carbonizing the obtained precursor in an inert atmosphere at the temperature of 600-900 DEG C to obtain a W18O49 / graphene material, then dispersing the W18O49 / graphene material in a hydroxylamine hydrochloride solution and / or a phytic acid solution for stirring reaction, and washing and drying the product to obtain the W18O49 / graphene / phosphorylation / amidoximation electrode material. The selective recovery efficiency of the obtained electrode material on uranyl ions can reach 95% or above, and the electrode material has wide application prospects in the field of nuclide uranium recovery.

The invention discloses an application of an azacyclo-thioketone compound, and particularly relates to an application of the azacyclo-thioketone compound in preparation of a vulcanizing agent. The azacyclo-thioketone compound is stable in property, not only has a thiocarbonyl sulfur atom of a reaction center in a molecular structure, but also has atoms with electron donating capability, such as nitrogen, oxygen and sulfur, on a heterocyclic ring, and selective flotation separation of copper, lead, zinc and iron sulfide minerals can be realized. However, no report about using the azacyclo-thioketone compound as the oxidized ore vulcanizing agent exists at present.

The invention relates to the technical field of composite functional materials, in particular to a preparation method of CaBTC / silicon dioxide composite aerogel and application of the CaBTC / silicon dioxide composite aerogel in desulfurization, and the preparation method comprises the following steps: S1, preparing a 1, 3, 5-benzenetricarboxylic acid solution and a calcium acetate solution; s2, at the room temperature, tetraethoxysilane, an organosilane modifier and dopamine are sequentially added into a mixed solution of ethyl alcohol and water, hydrochloric acid is dropwise added to adjust the pH to 2.0-5.0, after hydrolysis reaction, ammonia water is dropwise added to adjust the pH to 9.0-10.5, and silicon dioxide hydrogel is obtained and further aged; s3, washing the aged silicon dioxide hydrogel with water to be neutral, gradually dropwise adding a 1, 3, 5-benzene tricarboxylic acid solution into the hydrogel, dropwise adding a calcium acetate solution after adsorption equilibrium, carrying out ultrasonic reaction for 10 minutes to 2 hours, washing, and freeze-drying, so as to obtain the product. A sol-gel method and an in-situ growth method are combined, CaBTC is loaded in a silicon dioxide gel structure for the first time to prepare CaBTC / silicon dioxide composite aerogel, and sulfur dioxide gas can be synergistically and efficiently removed through compounding of CaBTC and silicon dioxide aerogel.

The invention relates to the technical field of adsorbents, in particular to a self-floating beta-ketoenamine covalent organic framework-chitosan aerogel adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing the TpPa-1-COF nano particles; s2, ultrasonically dissolving CS in an acetic acid aqueous solution to obtain a CS acetic acid aqueous solution; s3, performing ultrasonic dispersion on the TpPa-1-COF nanoparticles in ultrapure water, and then uniformly mixing a COF aqueous solution with a CS acetic acid aqueous solution to obtain a COF / CS mixed solution; s4, heating the COF / CS mixed solution to form COF / CS hydrogel, aging the COF / CS hydrogel at room temperature, and freeze-drying the COF / CS hydrogel to obtain the self-floating beta-ketoenamine covalent organic framework-chitosan aerogel adsorbent. The aerogel adsorbent disclosed by the invention has the characteristics of wide pH application range, high adsorption capacity and easiness in recovery in the aspect of recovering noble metals in wastewater, and particularly shows high-selectivity adsorption on Au.

The invention provides an electro-adsorption material for electrochemically extracting bromine as well as a preparation method and application of the electro-adsorption material. The electro-adsorption material comprises bismuth oxybromide nanosheets and poly (3, 4-ethylenedioxythiophene) loaded on the surfaces of the bismuth oxybromide nanosheets, and the mass ratio of the bismuth oxybromide nanosheets to the poly (3, 4-ethylenedioxythiophene) is (1-10): (0.1-5). The electro-adsorption material provided by the invention has relatively large adsorption capacity, good cycle stability and excellent selective adsorbability, still has adsorption capacity for a solution with the bromine ion content lower than 100mg / L, and is suitable for being applied to extraction of bromine from oilfield brine.

The invention belongs to the field of lithium-sulfur secondary batteries, and relates to a lithium-sulfur battery positive electrode and a preparation method thereof.The positive electrode active layer of the positive electrode comprises an active sulfur-graphene composite material, a conductive agent and polyvinylidene fluoride; the active sulfur is sublimed sulfur particles of which the surfaces are loaded with cerium single atoms. The cerium monatomic catalyst can form strong chemical bonding with polysulfide, and shuttling of the polysulfide can be effectively inhibited in cooperation with a physical barrier of graphene; the cerium has relatively high selective adsorption on long-chain polysulfide, the redox reaction energy barrier of the polysulfide is reduced, the utilization rate of sulfur is improved, the loss of active substances is reduced, and the coulombic efficiency, the cycle stability and the charge-discharge efficiency of the battery are improved; the conductivity of sulfur can be enhanced, rapid transmission of electrons in the whole electrode is promoted, and the rate capability of the battery is improved; meanwhile, cerium single atoms can form a stable coordination structure on the surface of sulfur, so that the volume expansion of sulfur in the charge-discharge process is limited, and the cycle life of the battery is prolonged.

The invention discloses a sodium manganate mesoporous silicate composite material for adsorbing cesium ions in radioactive wastewater as well as a preparation method and application thereof, and relates to the field of radioactive wastewater treatment.The sodium manganate mesoporous silicate composite material is prepared by dissolving NaMoO4.H2O and CSN2H4 in deionized water respectively, stirring, carrying out a hydrothermal reaction, washing, drying and carrying out electron beam irradiation to obtain ball-flower-shaped MoS2; the preparation method comprises the following steps: dissolving sodium manganate / MoS2 in deionized water, dissolving flower-ball-shaped MoS2 and Na2SiO3. 9H2O in deionized water, carrying out ultrasonic treatment, dissolving (CH3COO) 2Mn. 4H2O in deionized water, mixing, stirring, carrying out a hydrothermal reaction, cooling, washing, drying and grinding to obtain the sodium manganate / MoS2 composite material. The composite material disclosed by the invention has good adsorption performance on cesium ions, is suitable for treating radioactive wastewater, still shows excellent selective adsorption capacity under different pH conditions and an environment in which multiple metal cations coexist, and has a wide application prospect.

The invention discloses a preparation method of a bimetal functionalized organic framework material and application of the bimetal functionalized organic framework material in carbon dioxide adsorption and separation, the preparation method of the bimetal functionalized organic framework material comprises the following steps: by utilizing the characteristic that Ag < + > can form a relatively strong pi complexing action with double bonds, by adopting an ion exchange method, taking sulfonic acid functionalized UiO-66 as a carrier, and by adopting an ion exchange method, preparing the bimetal functionalized organic framework material. H < + > is replaced with Ag < + >, and bimetal functionalized UiO-66-SO3Ag is prepared; the product yield is effectively improved; according to the preparation method of the bimetallic functionalized organic framework material UiO-66-SO3Ag, the raw materials are cheap and easy to obtain, the synthesis conditions are simple, the yield is high, and the cost is low; due to the unique pore structure and the bimetal active site effect, the carbon dioxide adsorbent has high selective adsorption and separation capacity on carbon dioxide, and has good application prospects in the aspect of treating carbon dioxide excess in the environment.

The invention provides an organic polymer carbon source and a preparation method thereof, a positive electrode material and a secondary battery, and belongs to the technical field of lithium ion batteries, and the preparation method of the organic polymer carbon source comprises the following steps: mixing alcohol containing unsaturated double bonds, an ether monomer and water to obtain a base material; mixing a benzene ring monomer, a reducing agent and water to obtain a first mixture; mixing a phosphonic acid monomer, a chain transfer agent and water to obtain a second mixture; and adding an initiator, the first mixture, the second mixture and a coupling agent into the base material, and reacting to obtain the organic polymer carbon source. When the prepared organic polymer carbon source is applied to the preparation process of lithium iron phosphate, the carbon coating uniformity of a lithium iron phosphate material is improved, and the technical problems of unstable compaction density and electrochemical performance caused by non-uniform coating carbon and inconsistent particle growth in the existing lithium iron phosphate preparation process are solved.

The invention discloses a VOCs tail gas treatment system, and belongs to the technical field of waste gas treatment. The VOCs tail gas treatment system comprises the following steps: (1) pretreatment: carrying out condensation treatment on collected VOCs tail gas; (2) filtering: carrying out primary filtering on the VOCs tail gas subjected to condensation treatment through a filter; (3) adsorption: adsorbing the VOCs tail gas subjected to primary filtration treatment by adopting a modified molecular sieve adsorbent; (4) catalysis: carrying out degradation treatment on the VOCs tail gas subjected to adsorption treatment through a photocatalysis system; and (5) re-adsorption: adsorbing the VOCs tail gas subjected to degradation treatment by adopting modified activated carbon, and discharging the VOCs tail gas after the VOCs tail gas is detected to be qualified. The VOCs tail gas treatment system is sequentially provided with a condensation pretreatment step, a filtering step, a molecular sieve adsorption step, a photocatalysis step and an activated carbon re-adsorption step, an adsorption method and a catalysis method are combined, the two methods have a synergistic effect, and the VOCs tail gas treatment efficiency can be improved.

The invention belongs to the technical field of water treatment water purifying agents, and particularly relates to a method for preparing a polyaluminum chloride water purifying agent from aluminum mud. The preparation method comprises the following steps: carrying out ball milling, washing and acidolysis on aluminum mud to prepare an aluminum-containing solution, adding calcium aluminate to adjust the aluminum content of the solution, curing to prepare polyaluminum chloride, adding cationic polyacrylamide and 2-ethylhexyl acrylate, and polymerizing to prepare the polyaluminum chloride flocculant, so that macromolecular clusters are more easily formed, and the water purification flocculation effect is improved; the modified carbon adsorption material prepared by loading magnesium-aluminum hydrotalcite on bamboo fibers and carrying out low-temperature calcination and carbonization has excellent adsorption capacity; the oil adsorption aid prepared by modifying cotton fibers with catechol and then attaching a silica sol hydrophobic coating has excellent selective oil adsorption capacity; the polyaluminum chloride water purifying agent obtained by compounding the polyaluminum chloride flocculating agent with aluminum sulfate, a modified carbon adsorption material and an oil adsorption auxiliary agent according to a certain proportion has excellent adsorption sedimentation and temperature difference adaptability, and aluminum resources can be recycled.

The invention relates to a preparation method of a composition with soothing and repairing functions. The preparation method comprises the following steps: stirring and mixing aesculus chinensis fruits, feverfew, oat bran, mangnolia officinalis bark and radix stephaniae tetrandrae, drying, crushing and sieving to obtain mixed powder; adding an ethanol aqueous solution into the mixed powder, heating, refluxing, extracting, filtering, collecting an extracting solution, and extracting residues for the second time; combining the two extracting solutions, and concentrating into paste; dissolving the concentrated paste with hot water, adsorbing with modified D101 macroporous adsorption resin, loading the modified D101 macroporous adsorption resin into a chromatographic column, eluting, collecting an ethanol water eluent, concentrating and drying to obtain a plant composition mixed extract; the preparation method comprises the following steps: taking a plant composition mixed extract, adding the plant composition mixed extract into polyhydric alcohol, heating and stirring until the plant composition mixed extract is completely dissolved, adding water in batches, stirring while adding until the solution is clear and transparent, and filtering by using a 0.22 mu m filter membrane to obtain the composition with the soothing and repairing functions.

The invention belongs to the technical field of functional polymer materials, and particularly relates to modified resin as well as a preparation method and application thereof. The preparation method of the modified resin provided by the invention comprises the following steps: swelling a matrix resin, and carrying out a modification reaction with an aminopyrimidine compound to obtain the modified resin, wherein the matrix resin comprises macroporous resin, and the average pore size of the macroporous resin is 10 to 80 nm. The aminopyrimidine modified resin provided by the invention is used for removing organic matters in process tail gas, the total organic matter content in the tail gas is greatly reduced, the tail gas can be directly and safely discharged to the atmosphere, high-investment and high-energy-consumption treatment modes such as incineration are not needed, and the process is simple to operate, stable in operation and high in automation degree; the investment and operation cost can be greatly reduced, and the up-to-standard emission of tail gas is realized.

The present invention provides a three-dimensional porous chitosan / coal-based activated carbon composite sponge and a preparation method and application thereof, belonging to the technical field of adsorption materials. The surface of the three-dimensional porous chitosan / coal-based activated carbon composite sponge of the present invention has a large number of hydroxyl, amino and phosphoric acid groups, which are easy to combine with uranium ions to form complexes, thereby improving the adsorption capacity of uranium. At the same time, the hydroxyl, amino and phosphoric acid groups work synergistically to improve the selective adsorption of uranium by the sponge in a vanadium-uranium mixed solution.

A biochar-based ion-imprinted polymer material and its preparation method and application belong to the field of material preparation. The preparation method comprises: reacting a mixed solution containing a template and 4-vinylpyridine I to obtain a reaction system I, wherein the template is a metalloid compound or a heavy metal compound; adding biochar, a cross-linking agent, and an initiator to the reaction system I to carry out reaction II, washing, and drying to obtain a biochar-based ion-imprinted polymer material. When the material is used as a fixation / stabilization material for arsenic-containing soil remediation, it can be evenly distributed in the soil without causing agglomeration problems, can stably exist in a complex soil environment, has a good selective adsorption effect on free arsenic in the soil, and has a good short-term fixation effect. In addition, the material is a neutral material and has almost no effect on soil pH.

The invention relates to a magnetic metal organic framework, in particular to a deep eutectic solvent regulated magnetic metal organic framework and application thereof. According to the invention, DES functionalized regulated Fe-based MOF is successfully synthesized, and selective removal of tetracycline antibiotics in sewage is realized. The prepared MMIL-101-NH2-DES adsorbent has excellent adsorption performance on tetracycline, and the adsorption performance comprises good adsorption capacity, outstanding anti-interference capability and excellent renewability and reusability. And the removal rate in a 100 [mu] g / mL tetracycline solution in 60 min is as high as 98.82%. The designability advantage of DES is used for replacing a traditional organic solvent to adjust a supporting material, the adsorbent with selective adsorption capacity on a target analyte is synthesized, and the concept of sustainable chemistry is met. Meanwhile, the green characteristic of DES also provides a very good solution for avoiding secondary pollution in pollutant removal.

The invention provides an efficient heavy metal removal agent and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing hot water and a synthetic agent to obtain a synthetic agent solution; (2) adding nano orange-hole soil, pyridine, a promoter and p-toluene sulfonic acid into the synthetic agent solution, stirring, adding a sodium hydroxide solution, and continuously stirring to obtain a premix; (3) mixing the premix with a sodium hydroxide solution for alkali salt absorption to obtain a first intermediate material; (4) dropwise adding a sodium thiocompound into the first intermediate material for primary reaction to obtain a second intermediate material; and (5) dropwise adding a cross-linking agent and a stabilizer into the second intermediate material to carry out secondary reaction, and carrying out solid-liquid separation to obtain the efficient heavy metal removal agent. The efficient heavy metal removal agent provided by the invention is pyridylthio amino hydroxyl sodium modified nanometer orange-hole soil with a porous structure and a long-chain material, is good in stability and high in selective adsorption capacity on heavy metal elements, meets the green and environment-friendly requirements, and is beneficial to large-scale popularization and application.

The present application belongs to the technical field of high-value utilization of mineral resources and water treatment adsorption separation materials, and relates to a sepiolite-based lithium ion imprinting polymer, a preparation method and application in adsorption and separation of lithium ions in low-grade brine. The sepiolite is activated and pretreated, mixed with a lithium ion template, a functional monomer, a crosslinking agent and an initiator in a solvent system, and then subjected to a polymerization reaction, elution of the template ion, filtration, washing and drying to obtain the sepiolite-based lithium ion imprinting polymer. The sepiolite-based lithium ion imprinting polymer has good structural stability, lithium ion recognition selectivity and cyclic regeneration performance, and is suitable for efficient enrichment and separation of lithium ions in low-grade brine.

This invention discloses a scale-inhibiting and corrosion-inhibiting polymer fracturing fluid and its preparation method, belonging to oilfield chemicals. It comprises a multifunctional copolymer thickener, a modified strontium-barium dual-ion imprinted polymer, a crosslinking agent, a breaker, and deionized water. The multifunctional copolymer thickener is obtained by polymerizing acrylamide, a polymerizable corrosion inhibitor, and a polymerizable scale inhibitor. The polymerizable scale inhibitor is a polymerizable compound formed by the amidation reaction of polyaspartic acid and N-(3-aminopropyl)methacrylamide. The modified strontium-barium dual-ion imprinted polymer comprises a strontium-barium dual-ion imprinted polymer core and a polyethylene glycol derivative loaded with an alkyl glycoside nonionic surfactant. The polyethylene glycol derivative loaded with the alkyl glycoside nonionic surfactant is attached to the outer surface of the strontium-barium dual-ion imprinted polymer core. This invention improves the selective adsorption of strontium-barium through the strontium-barium dual-ion imprinted polymer, preventing the formation of insoluble scale by strontium-barium and anions.

The invention discloses an amidoximation hydrotalcite-antimonene composite material and a preparation method and application thereof.The preparation method comprises the steps that firstly, the surface of hydrotalcite is modified with an amino group, then the amino group is used for grafting and modifying a cyano group, the cyano group is converted into a hydroximic acid group through an amidoximation reaction, and amidoximation hydrotalcite is obtained; the amidoximation hydrotalcite is dispersed to form amidoximation hydrotalcite colloidal dispersion liquid, then the amidoximation hydrotalcite colloidal dispersion liquid and antimonene dispersion liquid are mixed and stacked to form a two-dimensional layered composite material, and then the two-dimensional layered composite material is obtained through centrifugation and drying. The composite material not only can effectively inhibit agglomeration of antimonene and hydrotalcite nanosheets, but also can increase active sites of the material combined with uranyl ions, and when the composite material is applied to electrochemical detection of uranyl ions, the composite material has high conductivity and high stability of antimonene and high specific adsorption of hydrotalcite.

The application relates to a COF adsorbent for efficiently and selectively recovering Pb (II) and application thereof, and belongs to the field of high-efficiency adsorbents for adsorbing heavy metals and high-sensitivity electrochemical sensors. A Schiff base reaction occurs between benzene [1,2-b:3,4-b':5,6-b'] trithiophene-2,5,8-trialdehyde (BTT) and 3,3'-dihydroxybenzidine (DHBD) to obtain BTT-DHBD-COF, which has excellent adsorption performance on Pd (II), and the adsorption capacity can reach 570.7 mg / g after 10 min of adsorption; the detection limit of BTT-DHBD-COF / GCE on Pb (II) is 3*10 ‑12 mol L ‑1 .

The invention discloses a preparation method of a carboxyl magnetic starch material, and belongs to the technical field of food safety. The material is prepared by performing enzymolysis on corn starch to form pores, catalyzing sodium hypochlorite to oxidize by TEMPO to introduce carboxyl, and compounding with Fe3O4 (at) SiO2 magnetic nanoparticles. The preparation method comprises the following steps: pretreating ferric oxide to prepare magnetic particles, carrying out enzymolysis on corn starch, carrying out oxidation modification and carrying out water-phase compounding. The material can efficiently adsorb food-borne heterocyclic aromatic amine, the content and peroxide value of heterocyclic aromatic amine in repeatedly used marinating soup or fried vegetable oil are reduced, high-selectivity capture and magnetic separation recovery are achieved, and the material has the advantages of being economical and environmentally friendly.

The invention provides a carbonized resin decolorizing and refining method for mixed dibasic acid dimethyl ester, and belongs to the technical field of chemical separation and purification. According to the technical scheme, spherical carbonized resin formed by carbonizing styrene-divinyl benzene polymer resin is used as an adsorbent, and a colored crude product DBE is subjected to decoloration treatment through a fixed bed process. The carbonized resin has extremely high selective adsorption capacity and adsorption rate on colored impurities in DBE, the Pt-Co color number of the carbonized resin can be reduced from 50 or above to 10 or below, the decolorization rate exceeds 80%, and meanwhile the yield of the DBE product reaches 99% or above. And the resin saturated by adsorption is easy to regenerate and can be repeatedly used. The method is simple in process, efficient and environment-friendly, overcomes many defects of a traditional activated carbon decoloration method, and is particularly suitable for industrial refining production of DBE.

The invention relates to the technical field of conjugated microporous polymer materials, and discloses a covalent triazine unit-based conjugated microporous polymer membrane with negative charges and a preparation method thereof. The method comprises the following steps: firstly, preparing a negatively charged cyanophenyl monomer through nucleophilic substitution reaction of a cyanophenyl-containing compound and 1, 4-butane sultone, then taking the monomer and biphenyl nitrile as comonomers, and carrying out step-by-step polymerization, heating film formation, shock cooling shaping and dual-solvent soaking post-treatment under the catalysis of trifluoromethanesulfonic acid to obtain the cyanophenyl-containing polymer film. And finally obtaining the covalent triazine unit-based conjugated microporous polymer membrane with negative charges. The preparation process is high in controllability, and the obtained film has high stability of a covalent triazine structure and the porous characteristic and negative charge function of conjugated micropores, and has wide application prospects in the fields of gas separation and the like through verification.

The present application relates to adsorption separation of bisphenol A and 2,4-bisphenol A adsorbent and its adsorption separation process; the adsorbent is a high-silicon Y molecular sieve containing rare earth, the molar ratio of the contained silicon oxide and aluminum oxide is 2.5:1-15:1, the contained rare earth metal is one or a combination of multiple of lanthanum, cerium, scandium and yttrium, the content of rare earth metal is 10:1-1000:1 in terms of the molar ratio of silicon and rare earth metal, and the rare earth metal exists in the form of metal ions. The adsorption separation process is to contact the mixture containing bisphenol A, 2,4-bisphenol A, triphenol and chroman in the crystallization mother liquor with the adsorbent in the adsorption separation reactor to carry out adsorption separation, and the obtained bisphenol A and 2,4-bisphenol A after adsorption separation enter the isomerization reaction unit; the obtained triphenol and chroman after adsorption separation enter the cracking reaction unit. Phenol is used as the eluent, has strong affinity with the adsorbent, and the elution efficiency reaches more than 95%.

The application discloses a kind of distiller's grains biomass-based modified adsorption hydrogel and its preparation and application.It includes the following steps: step one: take non-water soluble distiller's grains organic matter;Step two: the non-water soluble distiller's grains organic matter is dissolved, and organic matter solution is obtained;Step three: modifier is added to organic matter solution, and mixed liquor is obtained;Step four: gel component is added to mixed liquor, and initiator, crosslinking agent and plasticizer are further added, and gel crude product is obtained;Step five: gel crude product of step four is placed in refrigerator freezing, and after taking out, it is thawed at room temperature, and gel is obtained;Step six: the gel of step five is soaked in ethanol, then the surface residual uncrosslinked component is rinsed with water, and surface moisture is absorbed, and final product is obtained.The hydrogel material has the characteristics of simple preparation process, low cost, biodegradable, strong heavy metal adsorption capacity, good cycle stability, and waste utilization of distiller's grains, which to some extent alleviates the problem caused by inventory distiller's grains.