3099 results about "Ion exchange" patented technology

The invention discloses an integrated process for cooperative treatment and up-to-standard discharge of industrial wastewater and domestic wastewater of a power plant, and relates to the field of cooperative treatment of wastewater and sewage, and the integrated process comprises the following steps: configuring a raw water collection system, setting a raw water source, configuring a multi-stage filtration and heating pretreatment process, configuring an ultrafiltration membrane system, and setting a fine filtration path. A first-stage reverse osmosis system is configured, reverse osmosis parameters are set, a second-stage reverse osmosis system is configured, a low-conductivity water treatment path is set, a mixed ion exchanger is configured, a desalted water output path is set, a standby pool body is set, and the adjusting capacity is set. A raw water collecting system, a multi-stage filtering and heating pretreatment process, an ultrafiltration membrane system, a first-stage reverse osmosis system, a second-stage reverse osmosis system, a mixed ion exchanger and a standby pool body are sequentially arranged in the process. The problems of unstable effluent quality, insufficient deep desalination capability and poor emergency regulation capability in a traditional power plant wastewater treatment mode can be effectively solved.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention discloses a method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin, and belongs to the technical field of ethyl acetate preparation. The method comprises the following steps: mixing crosslinked polystyrene white balls and a swelling agent, and dropwise adding concentrated sulfuric acid for reaction to obtain S-PS resin; mixing an EDTA disodium salt saturated solution and a polyacrylic acid solution, adding a cross-linking agent and an emulsifier, and carrying out a cross-linking curing reaction to obtain EDTA microcapsules; the preparation method comprises the following steps: dispersing S-PS resin in a solvent, adding EDTA microcapsules, a dehydration condensation agent and a catalyst, reacting under the protection of inert gas, and filtering and recovering after the reaction is finished to obtain S-PS-EDTA resin; mixing glacial acetic acid, absolute ethyl alcohol and S-PS (at) EDTA resin for reaction, and filtering and collecting liquid after the reaction is finished; and rectifying the collected liquid to obtain the product. According to the method provided by the invention, metal impurities can be chelated in the synthesis process, and the electronic-grade ethyl acetate with high purity and low impurity content is produced.

The invention belongs to the technical field of soil improvement, and discloses a preparation method of a humic acid biochar saline-alkali soil conditioner. The preparation method comprises the following steps: by taking waste edible fungus chaff as a raw material, activating the waste edible fungus chaff with a KOH solution, pyrolyzing the waste edible fungus chaff under a limited oxygen condition to obtain fungus chaff-based biochar with a porous structure, mixing the fungus chaff-based biochar with humic acid, a sodion replacement material (desulfurized gypsum powder and / or calcium chloride) and purified water according to a certain mass ratio, and drying and fixing at medium temperature to obtain the modifier. According to the modifier, the porous adsorption performance of the biochar, the pH adjustment and agglomeration improvement functions of the humic acid and the sodium ion replacement capacity of the calcium source material are comprehensively exerted, the sodium ion content in the saline-alkali soil is synergistically reduced, and the soil agglomeration structure and the water and fertilizer retention capacity are improved. The prepared modifier is especially suitable for soil treatment of moderate and severe saline-alkali soil in which the ratio of sodium ions to exchangeable cations exceeds 10%, and has agricultural waste resource utilization and ecological restoration values.

The invention discloses a preparation method of an ultra-pure hydroxylamine aqueous solution, and relates to the field of organic chemistry and chemical industry production. The method comprises the following steps: reacting electronic-grade hydroxylamine salt with organic alkali in a proper solvent to generate hydroxylamine, then separating and removing salt and unreacted hydroxylamine in a reaction solution through a mercaptopyridine ion exchange modified membrane, and finally concentrating the solution into 50wt% ultra-high-purity hydroxylamine aqueous solution by adopting reduced pressure evaporation or multi-effect evaporation. The process has the characteristics of high efficiency, environmental protection, simplicity and easiness in operation, effectively improves the purity, yield and separation efficiency of hydroxylamine, and meets the strict requirements of electronic grade hydroxylamine on purity and metal ion content.

The invention discloses a silica sol preparation process optimization method and system based on data analysis, and belongs to the field of data processing.The method comprises the steps that operation data of an ion exchange column are obtained, meanwhile, quality parameters of silica sol are obtained, and evaluation data about the health state of the ion exchange column are calculated based on operation data of an inlet and an outlet of the ion exchange column; and then evaluating the health state index of the ion exchange column, predicting the quality parameters of the silica sol based on the operation data of the ion exchange column, estimating the influence of the column state on the quality of the silica sol, calculating the index relative error based on the comparison of the prediction index value and the actual measurement value of the silica sol, and adjusting the collection frequency of the silica sol. Meanwhile, the residual effective operation time of the ion exchange column is evaluated by combining the column saturation and the health state index, so that the stability of silica sol production is improved, and the production efficiency is improved.

The invention discloses a humic acid coated zeolite-based nutrient-loaded slow-release fertilizer as well as a preparation method and application thereof. The slow-release fertilizer comprises a zeolite-based core and a humic acid polymer coating coated outside the zeolite-based core. The slow release fertilizer provided by the invention not only retains the original high-loading nutrient loading function of the nano composite zeolite material, but also endows the nano composite zeolite material with chemically stable ion exchange and adsorption functions, thereby thoroughly getting rid of the original'instant nutrient fertilizer salt core '; the slow-release fertilizer provided by the invention takes artificial humic acid as a coating material, so that the use of chemical organic materials and solvents is completely avoided. According to the invention, the conversion of the inorganic fly ash solid waste and the organic biomass solid waste from raw materials to the ecological slow-release fertilizer is realized. Meanwhile, the efficient conversion of zeolitization and humification in the chemical industrial process realizes the large-scale production of the zeolite-based material doped with the heterogeneous metal in the pore cage frame structure and the carbon-negative humic acid polymer material.

The invention provides a step-by-step etching method for extracting an extremely trace amount of solar wind 10Be from a moon sample. Comprising the following steps: 1, screening samples; step 2, etching; step 3, element content analysis; step 4, performing complete digestion; step 5, fluorine removal; step 6, ion exchange; step 7, preparing Be (OH) 2; and step 8, preparing a BeO target sample. According to the method, the etching step length is accurately regulated and controlled by monitoring the element contents of different etching layers, so that fine etching is realized; compared with an existing full dissolution technology, the method is a brand-new step-by-step etching method, and by combining an ion exchange method, layer-by-layer etching of the moon and other extraterrestrial samples and extraction of 10Be in the moon and other extraterrestrial samples are achieved; according to the method, the solar wind injection rate can be determined, and the solar wind injection resource generation rate of the moon and other extraterrestrial celestial bodies can be estimated.

The present disclosure relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products. Herein are systems and processes for extracting lithium using ion exchange materials, where transition metal impurities may be removed from the synthetic lithium solution. In some embodiments, the transition metal species are reformulated to form ion exchange materials to be used in the systems and processes described herein.

An ion exchange filter (100) comprising: an outer housing (1) comprising a coolant inlet (2) and a coolant outlet (12); and an ion exchange device (11) configured to be disposed within the outer housing (1). The ion exchange device (11) comprises: an inner housing (5) configured to be inserted within the outer housing (1), the ion exchange filter (100) further comprising an inlet chamber (16) defined between a bottom portion of the inner housing (5) and a bottom portion of the outer housing (1); an ion exchange element (6) disposed within the inner housing (5) and configured to adsorb conductive ions in a coolant liquid; and an upper cover (10) removably connected to the inner housing (5) and to the outer housing (1), the ion exchange filter (100) further comprising an outlet chamber (73) defined between a top portion of the inner housing (5) and the ion exchange element (6).

The invention discloses an antistatic PET dust-free film and a preparation method thereof, and relates to the technical field of high polymer materials. When the antistatic PET dust-free film is prepared, firstly, 6-bromohexanoic acid reacts with 4-imidazole-1-butyric acid, and then is subjected to ion exchange with potassium hexafluorophosphate to prepare diacid imidazole hexafluorophosphate ionic liquid; the preparation method comprises the following steps: enabling montmorillonite to react with tetraethoxysilane, 3-aminopropyltriethoxysilane and dodecyl triethoxysilane, so as to obtain modified montmorillonite; carrying out copolycondensation on terephthalic acid, the diacid imidazole hexafluorophosphate ionic liquid, ethylene glycol and the modified montmorillonite to prepare a modified polyester master batch; and carrying out melt blending on the modified polyester master batch and a chain extender, and carrying out blow molding to obtain the antistatic PET dust-free film. The prepared antistatic PET dust-free film has the advantages of being antistatic, flame-retardant, super-hydrophobic and low in dust adhesion rate.

The invention relates to a layered oxide material with high cycle stability and a preparation method and application thereof, the chemical formula of the layered oxide material is LiaNabNixMn (1-x) O2, 0 lt; xlt; 0.90 < = a < = 1, 0 < = b < = 0.1; the preparation method comprises the following steps: preparing a layered oxide precursor NaNi < x > Mn < 1-x > O < 2 >; mixing the precursor with a first lithium source, and then carrying out lattice site Li < + > / Na < + > replacement by at least one of molten salt ion exchange, solid phase ion exchange and liquid phase ion exchange to obtain an intermediate; cleaning the intermediate, performing solid-liquid separation, and drying to obtain a layered oxide material with high cycle stability; the layered oxide material is prepared through lattice site selective Li < + > / Na < + > replacement reaction, so that the obtained material has excellent cycling stability and specific capacity, and the method is simple in process, low in cost and suitable for large-scale production.

The invention discloses a metal modified molecular sieve catalyst and a preparation method and application thereof. The catalyst is a metal-loaded molecular sieve which is modified by post-treatment after a metal component is loaded on the molecular sieve; the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, H-ZSM-35, H-MOR, H-MCM-22, H-ZSM-11 and H-ZSM-22, and the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, the metal is loaded on the molecular sieve through ion exchange and / or impregnation; the post-treatment modification is selected from at least one of heating treatment, water vapor treatment and silanization treatment. The metal component of the catalyst can catalyze dehydrogenation reaction and carbon dioxide activation, the molecular sieve component provides a substance diffusion channel and an acid center, and post-treatment modification can regulate the distribution of the molecular sieve acid center and improve the hydrothermal stability of the catalyst. The catalyst can efficiently promote the coupling reaction of cycloalkane and carbon dioxide, the selectivity of aromatic hydrocarbon reaches 90% or above, and the conversion rate of carbon dioxide reaches 20% or above.

The invention relates to the technical field of solid-state lithium batteries, in particular to an intercalation type composite solid-state electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ion exchange, centrifugal washing, freeze drying and other processes on sodium-based montmorillonite to obtain lithiated montmorillonite nanosheets; the preparation method comprises the following steps: adding lithiated montmorillonite nanosheets and polyethylene oxide into N, N-dimethylformamide to obtain slurry A; adding a high-molecular polymer material and lithium salt into N, N-dimethylformamide to obtain slurry B; dropwise adding the slurry A into the slurry B to obtain a precursor solution; and blade-coating the precursor solution on a glass substrate, standing, carrying out vacuum drying, and demolding to obtain the intercalation type composite solid electrolyte. The process is simple, the raw materials are easy to obtain, and the obtained electrolyte has high ionic conductivity, a wide voltage window and excellent mechanical property and flame retardant property.

The invention relates to the technical field of pharmaceutical preparations, in particular to a stable perindopril amlodipine tablet and a preparation method thereof, and the tablet comprises the following components in percentage by weight: 5.0% of arginine perindopril; 3.5% of amlodipine besylate; 20%-40% of pregelatinized starch; 40%-68% of a microcrystalline cellulose colloidal silicon dioxide compound; 2.5%-6% of a disintegrating agent, wherein the disintegrating agent is selected from one or more of ion exchange resin, sodium alginate and croscarmellose sodium; the pregelatinized starch and the microcrystalline cellulose colloidal silicon dioxide compound are selected as main diluents, so that the Maillard reaction possibly occurring between the lactose and the active pharmaceutical ingredients is completely avoided, the problem of increase of related substances is fundamentally solved, and the stability and the safety of the product are remarkably improved.

The invention discloses a preparation method of a CoMnFe-PBA hollow superstructure material, which combines seed induced self-assembly with an in-situ ligand / metal ion exchange growth method, and comprises the following steps: dissolving MOF-74 and potassium ferricyanide in deionized water, and carrying out ultrasonic treatment to form a solution A; dissolving polyvinylpyrrolidone, ferric chloride and manganese chloride tetrahydrate in a mixed solvent of ethanol and deionized water, and stirring for a certain time to obtain a solution B; dropwise adding the solution B into the solution A, stirring, carrying out centrifugal collection, ethanol washing and freeze drying on a reaction product, and collecting a sample to obtain the CoMnFe-PBA hollow superstructure material. According to the CoMnFe-PBA hollow superstructure material prepared through the method, a construction unit of a self-assembly superstructure is expanded to PBA nanoparticles, and the synthesis strategy, the construction unit, the structural level and the application range of the self-assembly superstructure can be further expanded.

This invention provides a heterogeneous tubular cation exchange membrane, its preparation method, and its application. The preparation method of the heterogeneous tubular cation exchange membrane includes: (1) mixing cation resin powder, binder, softener, stabilizer, and antioxidant to obtain agglomerated ion exchange material; (2) extruding the obtained agglomerated ion exchange material to obtain the heterogeneous tubular cation exchange membrane. The preparation method has simple overall operation steps and can prepare a heterogeneous tubular cation exchange membrane with a smaller inner diameter of the mold tube while ensuring that the tube wall remains unchanged. This is beneficial to improving the packing density of the membrane module and has important research significance.

The invention relates to the technical field of ion exchange equipment, and particularly discloses an ion exchange device and method for removing bubbles, the ion exchange device comprises a shell, the bottom of the shell is provided with a feed port, and the top of the shell is provided with a discharge port; the ion exchange assemblies are arranged in the shell and are arranged at intervals in the axial direction of the shell, and stirring gaps are formed in the two ends of each ion exchange assembly; the stirring assembly comprises a driving source, a stirring shaft and a plurality of stirring paddles, the driving source is installed outside the shell and is in transmission connection with the stirring shaft, the stirring paddles are installed on the stirring shaft, and at least one stirring paddle is arranged in each stirring gap; the exhaust pipes are in one-to-one correspondence with the ion exchange assemblies, the exhaust pipes are arranged at the tops of the ion exchange assemblies, and the exhaust pipes extend from the middle of the stirring gap to the outside of the shell in the radial direction of the shell. According to the invention, bubble removal is facilitated, and the ion exchange process is more stable.

The invention provides an efficient softening and hardness-removing process for a high-hardness water body, which is applied to the technical field of water body purification. The efficient softening and hardness-removing process comprises a pretreatment mechanism, a softening reaction mechanism, a flocculent precipitation mechanism and a sludge closed-loop treatment mechanism which are sequentially connected along a water body treatment flow direction, the efficient softening and hardness-removing process for the high-hardness water body comprises the following raw water treatment steps: S1, treating raw water by virtue of the pretreatment mechanism, so as to obtain ultrafiltration effluent; and S2, the ultrafiltration effluent enters the softening reaction mechanism, and under the control of the electric cabinet control mechanism, chemicals are added for softening and flocculation reaction. The total hardness removal rate can reach more than 90% through accurate addition of the medicament, two-stage pH control and optimization of reaction conditions, which is far superior to that of a traditional resin ion exchange method, the influence of high-hardness water discharge on receiving water is reduced, ecological and health problems caused by excessive hardness of the water are avoided, and the harsh requirements of industrial production and environmental protection on soft water are met.

The invention relates to the technical field of collagen extraction, and provides a collagen extraction process for increasing hydroxyproline content, which sequentially comprises the steps of raw material pretreatment, deliming and degreasing, directional enzymolysis, gradient pressure-temperature synergistic extraction, purification, concentration and drying, a composite pretreatment agent containing a proline hydroxylase activator, EDTA-2Na and neutral protease is adopted in the raw material pretreatment; deashing and degreasing are combined with a chelating agent solution and ultrasonic treatment; a compound enzyme solution composed of trypsin, papain and proline hydroxylase is used for directional enzymolysis; a two-stage gradient pressure-temperature cooperation mode is adopted for extraction; purification is realized through combination of gel filtration chromatography and ion exchange chromatography; and finally carrying out freeze concentration and vacuum freeze drying to obtain the product. According to the process, through a multi-step synergistic effect, the content of hydroxyproline in collagen is remarkably increased, the product purity is high, natural functional characteristics are reserved, and the process is suitable for the fields of food, cosmetics, biological medicine and the like.

The invention belongs to the field of methanol conversion and utilization, and particularly relates to a three-layer multi-core structure catalyst for high-selectivity synthesis of monomethylamine and a preparation method of the three-layer multi-core structure catalyst. The core layer of the catalyst is gamma-aluminum oxide, the middle layer of the catalyst is a mordenite (MOR) molecular sieve, and the outer layer of the catalyst is porous SiO2. The preparation of the multi-core MOR layer adopts a steam-assisted crystallization method, the preparation method is simple, no organic waste liquid is generated, the preparation method is environment-friendly, the multi-core MOR layer can be used in a reaction for preparing methylamine through continuous gas phase catalytic amination of methanol after being modified by ammonium ion exchange and chemical liquid phase deposition (CLD), the methanol conversion rate reaches 98.6% under the reaction conditions that the temperature is 340 DEG C, the methanol liquid hourly space velocity is 1.5 h <-1 >, the ammonia-alcohol ratio is 3 and the pressure is normal, and the method is suitable for industrial production. The mass ratio of monomethylamine is greater than 60%, and the method has a good application prospect.

The application discloses a PAG bonding type photosensitive photoresist resin and a preparation method and application thereof. The photoresist resin is as follows: formula. The PAG bonding type resin is prepared through the following reaction process: 1) performing a RAFT polymerization reaction on p-acetoxystyrene, p-styrene sulfonamide trifluoromethyl potassium salt and a RAFT chain transfer agent under the action of an initiator to obtain an intermediate I, 2) performing a hydrolysis reaction on the intermediate I to obtain an intermediate II, 3) performing a protection group introduction reaction on the intermediate II and di-tert-butyl dicarbonate to obtain an intermediate III; and 4) performing an ion exchange reaction on the intermediate III and triphenylsulfonium bromide. The application realizes the bonding of the PAG into the resin skeleton, and improves the problems of poor compatibility between the PAG and the resin, phase separation, uneven distribution of the PAG and the like. Therefore, the photoresist prepared from the resin has the photo-generated acid bound by the polymer main chain and limited diffusion, the resolution is improved, and the photoetching effect is excellent.

The invention relates to a method for extracting and purifying lycium barbarum polyphenol by combining bacteria and enzymes. The method comprises the following steps: pretreating lycium barbarum fruits to obtain lycium barbarum powder; extracting the wolfberry powder by using a first solvent to obtain a first crude extract; fermenting the first crude extract with lactobacillus plantarum to obtain a second crude extract; performing enzymolysis on the second crude extract by using pectinase, hemicellulase and beta-glucosidase in sequence to obtain an enzymolysis extracting solution; adsorbing and purifying the enzymolysis extracting solution by using first ion exchange resin, washing and eluting to obtain a first eluent; adsorbing and purifying the first eluent by using second ion exchange resin, washing and eluting to obtain a second eluent; and concentrating and drying the second eluent to obtain wolfberry polyphenol powder. According to the method disclosed by the invention, the fermentation of lactobacillus plantarum is combined with the synergistic effect of pectinase, hemicellulase and beta-glucosidase, polysaccharide in a crude extract is decomposed, polyphenol is released and combined, the extraction rate and the purity of the polyphenol are improved, and meanwhile, a continuous purification process of macroporous resins AB-8 and D-101 is combined, so that the product quality is further improved.

The invention relates to the technical field of wastewater treatment, and discloses a heavy metal wastewater treatment method and system.The method comprises the steps that the concentration, pH value, temperature and conductivity data of heavy metal ions are collected in real time through multiple types of sensors arranged in a wastewater pipe network and a treatment station, and standardized treatment is conducted; inputting the standardized data into a prediction algorithm unit, executing multi-parameter fusion analysis, and generating a concentration prediction result and a processing agent dosage; the coagulation reactor and the sedimentation tank are controlled to operate according to the prediction result, and chemical sedimentation and concentration of the heavy metal ions are achieved; the treated wastewater is deeply purified through adsorption, ion exchange and filtering processes, the final discharged water quality is obtained, the treatment efficiency is fed back, and closed-loop optimization control is formed. The system comprises a data acquisition and pretreatment module, a prediction and addition control module and a reaction and purification execution module, can realize automatic and intelligent optimization control of the wastewater treatment process, and remarkably improves the effluent standard-reaching rate and the system stability.

According to the red mud-based composite material and the preparation method and application thereof, bentonite, red mud and biomass are mixed in a proper amount of water according to the mass ratio of 1: 1: (1-10), and first suspension liquid is formed; drying the first suspension to obtain a precursor of the red mud-based composite material; the precursor is subjected to a carbon thermal reaction at 300-700 DEG C, ferric oxide in the red mud is converted into zero-valent iron, and the red mud-based composite material is obtained. The red mud is alkaline and promotes manganese ions to form insoluble precipitates, the unique structure and ion exchange capacity of the bentonite can effectively solidify the manganese ions, the biomass has a high specific surface area and a developed pore structure, and the manganese ions are physically adsorbed through Van der Waals' force and pore interception; ferric oxide in the red mud is converted into zero-valent iron in the carbothermal reaction process, and the zero-valent iron can catalytically oxidize ammonia nitrogen, so that the red mud-based composite material synchronously solves the problem of combined pollution of manganese and ammonia nitrogen in the soil.

The invention relates to the technical field of hafnium oxide preparation, in particular to a method for preparing hafnium oxide with ultralow iron content, which comprises the following steps: based on N235 extraction separation in a hydrochloric acid system, crushing hafnium oxide raw stone, performing coarse grinding to obtain hafnium oxide powder, then sequentially performing alkali fusion decomposition treatment and acid leaching impurity removal treatment to obtain a zirconium-hafnium mixed solution, and then performing vacuum drying on the zirconium-hafnium mixed solution to obtain the hafnium oxide with ultralow iron content. The preparation method comprises the following steps: taking hafnium as a raw material, carrying out extraction and back extraction to obtain a hafnium-enriched solution, treating the hafnium-enriched solution with ion exchange resin to obtain a high-purity hafnium solution, finally adding saturated ammonia water, filtering and washing the obtained precipitate, drying, and firing to obtain the hafnium oxide with ultralow iron content. According to the invention, while zirconium and hafnium separation is realized, a small amount of contained metal cations, especially iron ions, are fully removed, and the iron content is reduced, so that hafnium oxide with ultralow iron content is obtained.

The invention relates to a preparation method of a lithium difluoro bis (oxalate) phosphate concentrated solution, and belongs to the technical field of lithium battery electrolyte additives. Adding lithium oxalate into a solvent, stirring and dissolving to obtain a lithium oxalate solution; the method comprises the following steps: adding a modified fluorine ion chelating agent into a lithium oxalate solution, stirring, filtering, putting into a reactor, and slowly introducing phosphorus pentafluoride gas; after the introduction is finished, heating and stirring for reaction; after the reaction is finished, filtering reaction liquid to remove unreacted solid impurities, so as to obtain a lithium difluoro bis (oxalate) phosphate concentrated solution; the modified fluorine ion chelating agent is prepared from D301 ion exchange resin, dichloroethane, propylene-1-base boronic acid pinacol ester, mercaptoethyl guanidine dihydro bromide and sodium tert-butoxide. The lithium difluoro bis (oxalate) phosphate prepared by the method is high in purity and high in yield, and meets the use requirements of lithium ion battery electrolyte on lithium salt.

The invention relates to the technical field of radionuclide separation, in particular to an Eu (III) / An (III) separation method based on a zirconium phosphonate-based metal organic framework adsorbent, which comprises the following steps: adding the zirconium phosphonate-based metal organic framework adsorbent into an Eu (III) and / or An (III) nuclide-containing aqueous solution with the acid concentration of 0.001-3M to carry out adsorption reaction, and then carrying out solid-liquid separation, wherein the zirconium phosphonate-based metal organic framework adsorbent is a zirconium phosphonate-based metal organic framework material exchanged by metal cations M; the metal cation M is selected from one of alkali metal ions, alkaline earth metal ions or divalent transition metal ions. According to the invention, the interlayer chemical properties of the material are regulated and controlled through ion exchange, so that the adsorbent has ultrahigh selectivity, rapid adsorption kinetics, high adsorption capacity and excellent structural stability on trivalent actinide / simulated nuclides in extremely high-acid, high-salt and intense-radiation environments; the key problems of low separation efficiency and poor stability in a high-acid complex system in the prior art are solved, and the method is suitable for treating high-level liquid waste.

The invention provides a waste gas treatment device for ion exchange resin production, and belongs to the technical field of air purification, the waste gas treatment device comprises a purification box, two connecting pipes are symmetrically arranged on the outer surface of the purification box, an activated carbon bag taking-out assembly is embedded in the purification box, and the activated carbon bag taking-out assembly comprises an insertion hole formed in the center of one surface of the purification box; four restraining openings are symmetrically reserved in the inner surface of the inserting hole, an outer fixing cylinder is embedded in the inserting hole, restraining strips are arranged at the positions, close to the inner sides of the restraining openings, of the outer surface of the outer fixing cylinder, and the restraining openings are matched with the restraining strips; through mutual cooperation of the activated carbon bag taking-out assembly and the magnetic disc, the activated carbon bag can be taken out in a sealed state, tail gas in the activated carbon bag is prevented from overflowing, the purification box is sealed after the activated carbon bag is taken out, unpurified tail gas in the purification box is prevented from overflowing, and the breathing safety of workers is guaranteed.

The invention belongs to the technical field of coating compositions, and discloses an electrophoretic coating with high weather resistance and high salt mist resistance and a preparation method thereof. According to the coating, a composite pigment and filler system formed by compounding a surface-modified sheet-shaped physical shielding filler and a calcium / zinc double-ion exchange type corrosion inhibition filler is adopted, and the surface-modified sheet-shaped physical shielding filler forms a compact labyrinth structure to prolong a corrosion medium permeation path; the corrosion inhibition filler releases Ca < 2 + > / Zn < 2 + > under the stimulation of chloride ions to generate a composite precipitation membrane in situ to block electrochemical corrosion; the two components are co-ground and pre-dispersed and chemically bonded with a resin matrix through a silane coupling agent, so that the compactness, the adhesive force and the self-repairing capability of the coating are improved. The electrophoretic coating does not contain hexavalent chromium and is suitable for high-end protection scenes such as automobiles and ocean engineering.