12081 results about "Molecular sieve" patented technology

The invention relates to the field of sewage control, in particular to a nano zero-valent iron and zeolite molecular sieve synergistic composite material as well as a preparation method and application thereof. The nano zero-valent iron synergistic zeolite molecular sieve composite carrier (nZVI at Z-PU) is successfully prepared through an impregnation method, the preparation method is simple and controllable, and corresponding substances are introduced in the preparation process, so that the composite carrier has the structure and properties of being rough in surface, hydrophilic and carrying positive charges. Through modification, the ammonia nitrogen adsorption capacity of the nZVI-Z-PU is increased to 4-6.5 mg / g carrier, meanwhile, the initial adsorption capacity of the nZVI-Z-PU to microorganisms is remarkably improved and is 8.7 times that of a common polyurethane sponge carrier, and the initial adsorption capacity of the nZVI-Z-PU to the microorganisms is far superior to that of the common polyurethane sponge carrier. Therefore, after the zeolite molecular sieve and the nZVI are combined, the generation of NOB can be remarkably inhibited, and meanwhile, the activity of AnAOB is improved.

The invention relates to the technical field of drug research and development, and discloses a drug-like molecule screening system and method based on deep learning, and the system comprises a physical and chemical characteristic analysis module which is used for calculating molecular descriptors of compounds and generating a visual characteristic distribution chart; and the drug-like molecule screening module integrates a Lipinski rule, a Veber rule, a Ghose rule and a Muegge rule, and supports a user to customize a screening rule. Compound characteristics are comprehensively analyzed through the physical and chemical characteristic analysis module, flexible screening is achieved through the drug-like molecule screening module, toxicity risks are accurately recognized through the toxicity assessment module, the affinity assessment module is combined to assess the binding capacity in multiple ways, and the synthesis feasibility assessment module plans an efficient and low-cost synthesis path. The dynamic feedback optimization module continuously improves the system performance; all the modules work cooperatively, the problems of scattered tools, insufficient precision, low planning efficiency, optimization deficiency and the like in the prior art are effectively solved, the medicine research and development efficiency is greatly improved, and the research and development risk and cost are reduced.

The invention discloses a p-methyl benzyl chloride production process and a production system thereof, p-xylene side chains and chlorine are subjected to a gas phase substitution reaction under micro negative pressure and visible light catalysis to generate crude methyl benzyl chloride and hydrogen chloride, and 99.0% methyl benzyl chloride, a small amount of benzyl dichloride and 31% hydrochloric acid are respectively generated through rectification and absorption; the device consists of four working sections of chlorination, rectification, hydrochloric acid absorption and distillation. According to the method, the defects in the prior art are overcome, on one hand, chlorine is introduced, and an aromatic ring chlorination reaction is carried out under visible light catalysis; on one hand, a supported catalyst filler is arranged at the bottom of a chlorination tower, and a zeolite molecular sieve modified by long-chain alkylsilane and supported by metal salt is used as a catalyst to catalyze chloromethylation reaction, on the other hand, the hydrophobicity of the modified catalyst is obviously enhanced, and meanwhile, the density of acidic sites is not reduced; the contact opportunity of the catalyst and a reaction substrate is greatly increased, and the catalytic efficiency of the catalyst is improved.

The invention relates to the technical field of adsorbents, and particularly discloses an aluminum oxide type adsorbent and a preparation method thereof.The preparation method comprises the following steps that lanthanum salt, cerium salt and a polyethylene glycol aqueous solution are mixed to be uniform, then the mixture is mixed with gamma-Al2O3 to be uniform, pH is adjusted, standing is conducted, solid-liquid separation is conducted, drying and roasting are conducted, and a double-doped carrier is obtained; dispersing the double-doped carrier in a mixed solution containing 2-methylimidazole, ferric salt and zinc salt, adjusting the pH value, carrying out heating reaction, solid-liquid separation and drying in an inert atmosphere, grinding to obtain powder, and carrying out molding treatment on the powder to obtain a composite carrier; uniformly mixing the Ag modified molecular sieve with silica sol, coating the surface of the composite carrier with the mixture, and drying to obtain an adsorbent precursor; dipping an adsorbent precursor in the dispersion liquid, and after dipping, solid-liquid separation and drying, reactivating to obtain the aluminum oxide type adsorbent; the prepared adsorbent can synergistically and efficiently remove multiple impurities and is excellent in corrosion resistance.

The invention provides a novel method for synthesizing 1, 4-bis (4-fluorobenzoyl) benzene, which belongs to the technical field of aromatic halide production, and comprises the following steps: under inert gas, adding supported solid acid and fluorobenzene into a reaction container; the preparation method comprises the following steps: dropwise adding paraphthaloyl chloride into a reaction container, and reacting at 5-30 DEG C for 1-8 hours to obtain 1, 4-bis (4-fluorobenzoyl) benzene; carrying out purification treatment on the reaction system to obtain 1, 4-bis (4-fluorobenzoyl) benzene with the purity of 97.2% or above; the supported solid acid is composed of a carrier and Lewis acid; lewis acid is selected from any one of aluminum chloride, ferric chloride, titanium tetrachloride and zinc chloride; the carrier is selected from any one of an HY molecular sieve, an Hbeta molecular sieve, a ZSM-5 molecular sieve, acid-treated K10 montmorillonite, aluminum oxide and an MCM-41 molecular sieve. The reaction system condition is mild, the product purity is larger than or equal to 97.2%, after the condition is optimized, the purity is larger than 99.5%, the product and the catalyst can be separated through filtering, waste salt is avoided, the catalyst can be recycled, and the reaction is green and environmentally friendly.

The invention discloses a low-energy-consumption nitrogen-charging grain storage system and method, and relates to the field of nitrogen-charging grain storage. The method comprises the steps that compressed air is sequentially introduced into a filter set, a drying machine and a micro-oil adsorber to be purified and dried; stripping oxygen O2 molecules and water H2O molecules in the air by using a carbon molecular sieve pressure swing adsorption tower to obtain nitrogen N2 molecular gas; inputting nitrogen N2 molecular gas into a cold drying system, and cooling to a preset temperature range; detecting whether the concentration of the output nitrogen N2 molecular gas meets a preset concentration range or not by using an oxygen analyzer; and when the detected N2 molecular gas concentration of the nitrogen is lower than the lower limit of the preset concentration range, starting a circulating pump to suck the mixed gas in the closed warehouse to the carbon molecular sieve pressure swing adsorption tower for adsorption and nitrogen production again until the N2 molecular gas concentration of the output nitrogen meets the preset concentration range. Aiming at the problem that the nitrogen concentration in nitrogen-filled grain storage is difficult to accurately control in the prior art, accurate control of the nitrogen concentration and yield is realized.

The invention discloses a molecular sieve confinement noble metal catalyst for CO-SCR denitration as well as a preparation method and application thereof, and belongs to the technical field of catalytic reduction of nitrogen oxides. The catalyst comprises a molecular sieve carrier and an Ir metal nanocluster loaded in the molecular sieve carrier through confinement encapsulation. The preparation method comprises the following steps: mixing a first metal precursor solution with a first ligand to obtain a first mixed solution; mixing a second metal precursor solution with a second ligand to obtain a second mixed solution; mixing a silicon source, an aluminum source, alkali and a solvent to obtain a molecular sieve precursor solution; and mixing the molecular sieve precursor solution with the first mixed solution, then adding the second mixed solution, carrying out a hydrothermal crystallization reaction, and then carrying out centrifugal washing, drying and calcining to obtain the catalyst. The catalyst has good stability, shows a high nitrogen oxide conversion rate in an atmosphere containing O2 and SO2, and improves the catalytic ability of the catalyst to nitrogen oxides under different conditions.

The invention discloses a molecular sieve confinement platinum-based catalyst and application thereof in catalysis of waste plastics, the Pt-coated Hie-TS-1 catalyst is prepared through hydrothermal synthesis, the catalyst has a hierarchical structure, the contact area between the catalyst and polyethylene plastics is increased, the hydrocracking rate is increased, the pore channel selectivity for polyolefin is achieved, and the molecular sieve confinement platinum-based catalyst can be used for catalyzing the polyethylene plastics. Catalytic products are distributed and diverted to narrow distribution, alkane and olefin intermediates are selectively filtered in Pt-Hie-TS-1 according to the length and the size, the shape selectivity of C5-C7 olefins is adjusted, the selectivity of C5-C9 hydrocarbons reaches 94.9%, and the use amount of Pt can be reduced to 0.4; the obtained product has the highest liquid oil content, the total amount of liquid oil can reach 93.5%, and the catalytic effect is the best.

The single-person oxygen generator comprises a compressor for compressing air and an adsorption assembly for separating nitrogen and oxygen in the air, the adsorption assembly comprises two adsorption tanks, a circulation tank is arranged between the two adsorption tanks, and a spiral sleeve, a rotating rod, a feeding plate and a collecting tank are arranged in the circulation tank; the rotating rod is coaxially and slidably connected with the spiral sleeve, the feeding plate is in threaded connection with the spiral sleeve, the collecting tank is located below the feeding plate, and the feeding plate can move in the circulation tank to screen out broken bodies and powder in molecular sieve particles and change positions of the screened-out molecular sieve particles. The circulation tank of the oxygen generator is used for screening broken bodies and powder of molecular sieve particles, meanwhile, the feeding plate can move the screened molecular sieve particles from the air inlet end to the air outlet end, the adsorption energy efficiency of the molecular sieve at the air inlet end is kept, and the collecting tank in the circulation tank can collect and timely treat the screened broken bodies and powder.

A phosphorus-modified ZSM-5 molecular sieve is characterized in that in a 31P MAS-NMR spectrogram, the chemical shift range of resonance signal peaks is 5-20 ppm, and after hydrothermal aging is carried out for 17 h under the conditions of 800 DEG C and 100% water vapor, the area ratio of the resonance signal peaks with chemical shifts of-30 + / -3 ppm to-40 + / -3 ppm is larger than 1; the phosphorus content retention rate of the molecular sieve after water washing is higher than 50%.

The invention discloses a split type vehicle-mounted intelligent oxygen supply system based on the VPSA technology and a control method, and the system comprises an air compressor which is arranged at the inner side of a wheel cover protection plate of a rear wheel of a vehicle and is used for compressing air and discharging the compressed air to a molecular sieve assembly; the molecular sieve assembly is arranged below a spare tire in a trunk of the vehicle and is used for separating nitrogen from oxygen in the air to generate oxygen; the oxygen conveying pipe is arranged on the inner side of the vehicle roof and connected with an oxygen outlet of the molecular sieve assembly, and an oxygen outlet is formed in the position, located above each seat, of the oxygen conveying pipe; the detection module comprises an altitude sensor and an oxygen concentration sensor, the altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is arranged on a ceiling in a vehicle compartment; distributed arrangement is adopted, all parts of the oxygen supply system are installed at different positions of the vehicle, the space occupied by the oxygen generation system can be reduced, and meanwhile directional oxygen supply to specific seats is achieved through the distributed oxygen outlets.

The invention provides a reformate dechlorinating agent and a preparation method thereof. The reformate dechlorinating agent comprises an active component, a carrier and a binder, wherein the active component is sodium carbonate and / or sodium bicarbonate, and the carrier comprises alumina powder and alkali-washed waste FER molecular sieves; the specific surface area of the dechlorinating agent for the reformate is 60-150m < 2 > / g, and the average pore size is 10.5-18.5 nm. The problems that in the prior art, the waste FER molecular sieves are not fully recycled, and a dechlorinating agent which is low in cost and good in dechlorinating effect is lacked are effectively solved.

The invention provides a moisture-resistant and high-temperature-resistant wire and a preparation method and application thereof. And each wire comprises a conductor, and a mica insulating layer, an inorganic fiber insulating layer, a high-temperature-resistant insulating paint layer, a molecular sieve moisture-resistant layer and an outer protective layer which are sequentially coated outside the conductor from inside to outside. The heat-resistant grade of the moisture-resistant and high-temperature-resistant wire can reach 600 DEG C; the characteristics of specific adsorption of the nanoscale molecular sieve on water vapor and desorption in a heating state are combined, so that the water vapor blocking function is achieved in a high-humidity environment, desorption can be achieved at a high temperature to remove residual water molecules, insulation failure caused by water vapor permeation can be reduced, the reliability is greatly improved, and the service life is greatly prolonged; good insulation performance can still be maintained after high-frequency vibration; the cable can be used in a high-temperature, high-humidity and high-frequency vibration environment, and the high-temperature resistance, the moisture resistance and the vibration resistance of a signal or power transmission wire are improved.

The invention discloses a desulfurization adsorbent for low-carbon olefins and a preparation method of the desulfurization adsorbent, and belongs to the technical field of preparation of desulfurizers. The desulfurization adsorbent is a 13X molecular sieve with larger K < + > ion exchange aperture, so that the acting force between adsorbed molecules and cations is weak, the adsorption heat is obviously reduced, the olefin adsorption capacity is weakened, the polymerization reaction of olefin is obviously inhibited, the content of effective components can be further improved, and the adsorption capacity is improved; in the forming process of the adsorbent, a macromolecular polymer and a mesoporous high-thermal-conductivity material are added, local heat accumulation in the adsorption process is reduced, local temperature rise is relieved, meanwhile, heat is rapidly taken away, the adsorption temperature rise is small, and unexpected shutdown, olefin leakage and other dangers are avoided; in the forming process of the adsorbent, metal components are added, the adsorption sites of the adsorbent are further increased, the adsorption speed is higher, and the desulfurization efficiency is higher.

The invention relates to a composite positive plate, a diaphragm-free lithium battery and a lithium battery. The composite positive plate at least comprises a positive plate layer, the positive plate layer comprises a composite structure uniformly distributed in a positive active material, the composite structure is formed by loading molecules of an oxygen trapping agent in a molecular sieve, and the oxygen trapping agent is liquid at room temperature. Or, the invention provides a composite positive plate which at least comprises a positive plate layer and a surface functional layer on the outermost surface of the positive plate layer, and the surface functional layer at least comprises the composite structure. Therefore, the self-exothermic reaction caused by the oxidizing gas and the reducing gas generated in the lithium battery can be delayed, the self-exothermic temperature rise of the battery under the abuse condition is reduced, the exothermic quantity is reduced, and the probability of thermal runaway is reduced.

The invention discloses a method for improving the loading capacity of a honeycomb-shaped catalytic carrier and preparation of a denitration catalyst based on the catalytic carrier. The preparation method comprises the following steps: firstly, preparing a honeycomb-shaped catalytic carrier by utilizing natural silicon-aluminum minerals, selecting water-soluble polymer bundle-shaped fibers as a structure manufacturing agent, and performing pretreatment by adopting two working procedures of alkali liquor etching and structured water dissolution to obtain a clay-based honeycomb-shaped catalytic carrier; and then, completely immersing the catalytic carrier into the molecular sieve-based coating slurry, dipping and coating twice, and roasting to obtain the high-load molecular sieve-based coating type honeycomb-shaped integral denitration catalyst. The honeycomb-shaped catalytic carrier is subjected to structural adjustment, and an inner wall channel is effectively widened, so that during subsequent denitration catalyst preparation, the contact time and the contact area of molecular sieve-based coating slurry are increased, the problem that the slurry is difficult to adhere is solved, the hole blocking phenomenon and the slurry hanging phenomenon are reduced, the slurry loading rate of the catalyst is increased, and the denitration catalyst preparation efficiency is improved. The catalytic activity is improved.

The embodiment of the utility model provides a nitrogen making machine, which relates to the technical field of nitrogen making equipment, and comprises a PSA (Pressure Swing Adsorption) nitrogen making machine, the PSA nitrogen making machine comprises a pipeline system and two adsorption towers with consistent specifications, sealing plates are fixed at the top ends in the adsorption towers, and rotating holes are formed in the tops of the sealing plates and the tops of the adsorption towers. When the adsorption tower of the nitrogen making machine performs adsorption work, the servo motor drives the output shaft of the reduction gear box to rotate, so that the screw rod obtains relatively large twisting force, and the screw rod enables a molecular sieve to enter the middle cylinder and then be discharged from the middle cylinder in a screw transmission manner, so that the molecular sieve circularly flows in the adsorption tower, and the adsorption efficiency is improved. The molecular sieves are arranged in the adsorption tower, so that airflow entering the adsorption tower can be in uniform contact with the molecular sieves, the phenomenon of local saturation is avoided, and the turbulent flow effect can be started through the flowing molecular sieves, so that the retention time of the airflow in the adsorption tower is prolonged, and the adsorption efficiency is improved.

A secondary battery and an electric apparatus. The secondary battery comprises an electrode assembly, which comprises a positive electrode sheet, a negative electrode sheet and a separator, wherein the separator is arranged between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet comprises a positive electrode tab, a positive-electrode current collector, a first molecular sieve coating and a positive-electrode active material layer, and in a first direction, the positive electrode sheet comprises a second region and a first region which are connected in sequence, wherein the positive electrode tab and the positive-electrode current collector in the first region are integrally arranged, the first molecular sieve coating is arranged on at least one surface of the positive-electrode current collector in the first region, the positive-electrode active material layer is arranged on at least one surface of the positive-electrode current collector in the second region, and the first direction is the extension direction of the positive electrode tab in an unfolded state; and the first molecular sieve coating comprises a molecular sieve and a first binder, and on the basis of the mass of the first molecular sieve coating, the mass percentage of the molecular sieve ranges from 10% to 90%, and the mass percentage of the first binder also ranges from 10% to 90%. The secondary battery has a good cycling performance and a good drop safety performance.

The invention relates to a concrete anti-cracking self-repairing agent in the technical field of building materials, and aims to solve the problem that concrete cracks are difficult to self-repair. According to the technical scheme, the self-repairing agent is characterized by comprising a microbial repairing unit formed by ZSM-5 type zeolite molecular sieve loaded bacillus pasteurii spores, mesoporous silica particles loaded with L-calcium aspartate and Fe3O4 (at) SiO2 core-shell nanoparticles which are fixed through an in-situ polymerization coating layer to form a magnetic thermal response capsule layer coating the surface of the microbial repairing unit, pLGA microspheres containing yeast extract are positioned on an interface of zeolite and hydrogel, and a trehalose-anhydrous calcium chloride eutectic compound is used as a directional mineralization accelerant. The concrete anti-cracking self-repairing agent provided by the invention is mainly used for intelligent identification and self-repairing of concrete cracks, and efficient repairing is realized through a microbial mineralization, calcium ion slow release and magnetic thermal response synergistic mechanism.

The invention provides a method for preparing a lithium slag-based molecular sieve by melting lithium slag with assistance of eutectic salt, and relates to the technical field of molecular sieves. The method comprises the following steps: carrying out acid pickling pretreatment on a lithium slag raw material to obtain pretreated lithium slag; co-grinding and uniformly mixing the pretreated lithium slag and eutectic salt, and reacting at 200-350 DEG C for 2-6 hours to obtain eutectic lithium slag; carrying out aging treatment and crystallization treatment on the eutectic lithium slag, carrying out solid-liquid separation, washing the solid to be neutral, and drying to obtain a lithium slag-based molecular sieve; wherein the eutectic salt comprises an alkali solvent and an auxiliary salt, the alkali solvent is sodium hydroxide, and the auxiliary salt is at least one of chlorine salt, villiaumite, carbonate, sulfate and nitrate; the molar ratio of the alkali flux to the auxiliary salt is (4-19): 1. According to the method, the eutectic salt system is introduced in the lithium slag alkali fusion stage, meanwhile, the molar ratio of the alkali flux to the auxiliary salt in the eutectic salt is controlled to be (4-19): 1, the alkali fusion reaction temperature is reduced, the reaction of the lithium slag and alkali is promoted, the molecular sieve yield is increased, the product morphology can be regulated and controlled, and a specific molecular sieve can be formed in a guiding mode.

The invention relates to an SSZ-39 molecular sieve and preparation and application thereof.The preparation method comprises the following steps that 1, after water, an alkali source and a template agent are mixed, mesoporous Y zeolite and a silicon source are added, the mixture is stirred to be uniform, and the mixture is aged to be in a white gel shape; (2) transferring the obtained white gel into a reaction kettle, carrying out crystallization treatment, and filtering, washing, drying and calcining a crystallized product to obtain a Na-SSZ-39 molecular sieve; (3) carrying out ammonium ion exchange on the Na-SSZ-39 molecular sieve, filtering, washing, drying and calcining to obtain an H-SSZ-39 molecular sieve; and (4) carrying out copper ion exchange on the H-SSZ-39 molecular sieve, filtering, washing, drying and calcining to obtain the Cu-SSZ-39 catalyst. Aluminum used in the method is provided by mesoporous Y zeolite, the pure-phase SSZ-39 molecular sieve can be synthesized in a wide gel range, the crystallization time is shortened to 24 h, and after copper ion exchange, the pure-phase SSZ-39 molecular sieve shows high denitration activity in the selective catalytic reduction reaction of nitrogen oxide ammonia.

The invention relates to a method for producing diacetylmonoxime with high selectivity. The method comprises the following steps: by taking a catalyst, a solvent, butanone, ammonia water and a hydrogen peroxide aqueous solution as raw materials, carrying out ammoximation reaction, tert-butyl alcohol rectification, oxime-water separation and diacetylmonoxime rectification to obtain diacetylmonoxime; the catalyst is a boron-nickel-doped titanium silicalite molecular sieve, and the titanium silicalite molecular sieve, sulfydryl siloxane and ethanol are mixed to react, filtered and dried to obtain the sulfydryl titanium silicalite molecular sieve; the preparation method comprises the following steps: heating and reacting a mercapto titanium silicalite molecular sieve, allyl (cyclopentadienyl) nickel and sodium ethoxide; and finally adding (+)-IPC2B (allyl) borane, continuously reacting, and distilling to remove ethanol, thereby obtaining the product. The diacetylmonoxime prepared by the method disclosed by the invention has relatively high conversion rate and selectivity.

The invention belongs to the technical field of gas separation membranes, and discloses a novel Cardo-based polyimide carbon molecular sieve membrane for CO2 / CH4 separation and a preparation method thereof.The carbon molecular sieve membrane is prepared in an improved carbonization mode, a synthesized carbon molecular sieve membrane precursor is a polyimide membrane with-CF3 and fluorenyl, and the carbon molecular sieve membrane precursor is a polyimide membrane with-CF3 and fluorenyl. And meanwhile, a diamine monomer with high steric hindrance is introduced for copolymerization, so that the pore distribution and gas separation performance of the carbonized carbon molecular sieve membrane are improved. The preparation method comprises the following steps: firstly, preparing a flat sheet membrane with a smooth surface from various prepared polyimides in a solvent evaporation manner, and then carbonizing a polymer membrane with high free volume and high rigidity in an improved carbonization manner, so that the polymer membrane has micropore-ultramicropore pore channel distribution and excellent gas separation performance; the method has a good industrial prospect in the field of CO2 / CH4 separation.

The invention discloses a preparation method of an adsorption and reduction bifunctional catalyst for denitration of tail gas of a diesel vehicle. The preparation method comprises the following steps: uniformly loading a Pd component and a Cu component on the surface of a molecular sieve to prepare a corresponding Pd-based molecular sieve and a corresponding Cu-based molecular sieve; and then coupling the Pd-based molecular sieve and the Cu-based molecular sieve according to a certain proportion by using a solid-phase grinding means to obtain the adsorption and reduction dual-functional Pd-Cu / SSZ-13 catalyst. The adsorption and reduction bifunctional Pd-Cu / SSZ-13 catalyst prepared by the method not only has excellent SCR activity at the temperature of 200 DEG C or above, but also has good PNA capacity at the temperature of 200 DEG C or below, can realize high-efficiency denitration of diesel vehicle tail gas in a full-temperature section, and can be widely applied to a diesel vehicle tail gas after-treatment system.

The invention relates to the technical field of hydrogen production equipment, in particular to a hydrogen preparation and purification device and method. According to the hydrogen preparation and purification device, by arranging the deaerator, the pre-drying tower, the first drying tower, the second drying tower, the condenser, the flow regulator, the regeneration gas heater, the regeneration gas condenser and the multiple control valves, heating adsorption and condensation adsorption of hydrogen are achieved, hydrogen consumption is effectively reduced, and the good purification effect of hydrogen is guaranteed; as the hydrogen obtained by water electrolysis is pure and has low impurity content, the process route of removing impurity oxygen by adopting the hydrogen under the catalytic action of the palladium catalyst and then carrying out temperature swing adsorption dehydration by adopting the activated aluminum oxide and molecular sieve composite bed layer is reasonable, the process flow is simple, the energy consumption is low, and for small and medium-sized purification devices, system integration and skid-mounting are easy, and the cost is low. And the method can be widely applied to various industrial fields.

The invention relates to a phenolic resin modified carbon molecular sieve and a preparation method and application thereof, and belongs to the technical field of adsorbents. The technical problem to be solved by the invention is to provide the phenolic resin modified carbon molecular sieve, and the adsorption selectivity is improved. The method comprises the following steps: a, in-situ polymerization: mixing phenolic resin polymerization mother liquor with a carbon molecular sieve, standing for adsorption, and heating the adsorbed carbon molecular sieve for polymerization reaction to obtain a polymerization product; the phenolic resin polymerization mother liquor comprises a phenolic substance, an aldehyde substance and a solvent; and b, carbonization modification: roasting the polymerization product in a protective atmosphere to obtain the phenolic resin modified carbon molecular sieve. The carbon molecular sieve is modified through phenolic resin in-situ polymerization, and the method is simple, low in cost, high in reaction controllability and suitable for industrial production. The phenolic resin modified carbon molecular sieve has selective adsorbability, can be applied to an N2 / CH4 system, selectively adsorbs N2, and is high in separation ratio and good in stability.

The invention discloses a method for synthesizing tetrahydrofuran from furfural in one step and a preparation method of a catalyst for the tetrahydrofuran. The catalyst is a bimetallic catalyst, bimetallic is M1 and M2, M1 is Pd, and M2 is selected from one of Pt, Rh, Ru, Ni, Cu, Co, Mn and Ce; the catalyst comprises an active component and a carrier, the bimetallic is the active component, and the carrier is selected from at least one of activated carbon, silicon dioxide, aluminum oxide, magnesium oxide, an S-1 molecular sieve, a ZSM-5 molecular sieve, a Beta molecular sieve, an MOR molecular sieve and a Y molecular sieve; based on the total weight of the catalyst, the loading capacity of M1 is 0.5-3.5%, and the loading capacity of M2 is 0.5-3.5%. The catalyst provided by the invention can be used in a reaction for preparing tetrahydrofuran through furfural hydrogenation, and can improve the conversion rate of furfural and the selectivity of tetrahydrofuran.

The invention relates to the technical field of fibers, and discloses an antibacterial and antistatic fiber material based on silver ions and halamine and a preparation method of the antibacterial and antistatic fiber material. The preparation method comprises the following steps: loading a methyl methacrylate-based polymer on the surface of a silver-loaded molecular sieve through an in-situ polymerization method, and grafting a halamine antibacterial monomer chlorinated piperidinol through an ester exchange reaction to obtain an antibacterial agent; the preparation method comprises the following steps: carrying out reaction polymerization on caprolactam, quaternized polyether, polyethylene glycol, 2, 6-dipicolinic acid and adipic acid to obtain an antistatic agent; an antibacterial agent, an antistatic agent and nano-silver are added into chemical fiber slices, the antibacterial and antistatic fiber material based on silver ions and halamine is prepared after melt spinning, and the chemical fiber slices are polyester slices or chinlon slices or polypropylene slices. The fiber material has excellent antibacterial and antistatic properties.

The invention provides a composite material modified diaphragm, which comprises a base membrane and a composite material film compounded on the surface of the base membrane, and the raw materials of the composite material film comprise a binder, a mesoporous molecular sieve and a sodium salt. The invention also provides a sodium ion battery without a negative electrode. According to the composite material modified diaphragm provided by the invention, the raw materials comprise the mesoporous molecular sieve and the sodium salt, the mesoporous molecular sieve provides a diffusion path for directional transmission of sodium ions, the ionic conductivity of the composite material modified diaphragm is increased by the sodium salt, and meanwhile, the cycle performance of the sodium ion battery is improved by adding the mesoporous molecular sieve and the sodium salt.

The invention discloses a compound molecular sieve ozone catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: mixing molecular sieve powder with a low silica-alumina ratio and a salt solution of an active component, heating and stirring the mixed solution to evaporate the solvent, washing, drying, calcining and grinding the residual solid to obtain the compound molecular sieve ozone catalyst. Active component loaded hydrophilic molecular sieve powder is obtained; the preparation method comprises the following steps: mixing all-silicon molecular sieve powder and an NH4F aqueous solution, carrying out a hydrothermal reaction, and after the reaction is finished, washing, drying, calcining and grinding an obtained solid material to obtain fluorinated modified hydrophobic molecular sieve powder; mixing the active component loaded hydrophilic molecular sieve powder, the fluorinated modified hydrophobic molecular sieve powder, an inorganic binder and a pore forming agent, and granulating to obtain spherical catalyst particles; and drying and calcining the spherical catalyst particles to obtain the compound molecular sieve ozone catalyst. The ozone catalyst provided by the invention improves the removal rate of refractory organics in reclaimed water.