4952 results about "Ion exchange" patented technology

The invention provides a flame-retardant heat-insulating fabric for fire-fighting clothes and a preparation process thereof, and belongs to the technical field of fire-fighting fabrics. The preparation process comprises the following steps: preparing coated modified ammonium polyphosphate; modified expanded perlite; preparing a flame-retardant outer-layer fabric; preparing a heat insulation core layer fabric; preparing an antibacterial inner layer fabric; and bonding. The flame-retardant heat-insulating fabric for the fire-fighting clothes comprises a flame-retardant outer-layer fabric, a heat-insulating core-layer fabric and an antibacterial inner-layer fabric, ammonium polyphosphate is dispersed in deionized water, polyethyleneimine is added under the acidic condition, amino on the polyethyleneimine and ammonia ions of the ammonium polyphosphate are subjected to an ion exchange reaction, and the flame-retardant heat-insulating fabric for the fire-fighting clothes is obtained. According to the flame-retardant outer-layer fabric, ammonium polyphosphate is preliminarily coated, then a hydroxyethylidene diphosphonic acid solution is added for a salt forming reaction, coated modified ammonium polyphosphate with a core-shell structure is prepared, the coated modified ammonium polyphosphate and polyester powder are mixed and granulated, then the flame-retardant outer-layer fabric is prepared, and the flame-retardant property of the flame-retardant outer-layer fabric can be effectively improved.

The invention relates to the technical field of municipal sludge treatment, in particular to a method for recycling nitrogen and phosphorus elements from municipal sludge. According to the method, the municipal sludge is subjected to hydrothermal carbonization treatment, the treated solid-phase product is dried and ground to a specific particle size, the solid-phase product is subjected to acid leaching under a specific condition to extract the phosphorus element, and then heavy metal and metal elements such as Al and Fe in the acid leaching liquid are removed by adopting strong-acid ion exchange resin and a chemical precipitant, so that the phosphorus element is obtained. And finally, mixing the struvite with a hydrolyzate which is subjected to hydrothermal carbonization treatment and is rich in ammonia nitrogen, and precipitating by adjusting the element proportion and the pH value to obtain a solid-phase product struvite crystal. According to the method, external nitrogen-containing substances do not need to be added, the content of heavy metal in the solid-phase product struvite can be effectively reduced, the recovery rate of phosphorus can reach 93% or above, the recovery rate of ammonia nitrogen can reach 63% or above, the recovery rate of nitrogen and phosphorus is high, energy consumption is low, and the treatment cost is low.

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 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 belongs to the technical field of glass manufacturing, and particularly relates to anti-falling and anti-scratching lithium aluminum silicate glass and a preparation method thereof.The anti-falling and anti-scratching lithium aluminum silicate glass is prepared from, by mass, 250.0%-65.0% of SiO2, 10.0%-20.0% of Al2O3, 2.0%-8.0% of Na2O, 1.0%-5.0% of K2O, 1.0%-5.0% of MgO, 1.0%-5.0% of ZrO2, 2.0%-8.0% of Li2O, 0.1%-2.0% of CaO, 1.0%-5.0% of Y2O3, 0.1%-5.0% of BaO and 0.05%-0.5% of additives; the additive is one or more of Fe2O3, Co2O3, CuO and Cr2O3; the mass ratio of BaO to Y2O3 is 1: (2-4). The problems of long founding time, low ion exchange process efficiency, low hardness, low bending strength and poor high-temperature stability of the existing lithium aluminosilicate glass preparation process are solved.

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 discloses a water-borne epoxy resin coating which comprises a component A and a component B, the component A is prepared from 60 to 80 parts of 50 percent modified water-borne epoxy resin emulsion, 5 to 15 parts of deionized water, 0.5 to 1 part of wetting dispersant, 0.2 to 0.8 part of defoaming agent, 5 to 10 parts of modified zinc phosphate, 3 to 5 parts of ion exchange antirust pigment, 4 to 6 parts of sericite powder, 3 to 5 parts of glass flake, 5 to 10 parts of precipitated barium sulphate, 1 to 5 parts of nano silicon dioxide and 0.5 to 1 part of rheological additive; 1 to 2 parts of modified organic bentonite slurry; 0.1 to 0.3 part of a pH conditioning agent; and 0.2 to 0.8 part of a flash rust inhibitor. The component B is prepared from 40 to 50 parts of waterborne epoxy-amine adduct, 20 to 30 parts of 50 percent modified polyamide curing agent, 5 to 15 parts of 60 percent Mannich base phenolic aldehyde amine curing agent, 0.5 to 1.5 parts of epoxy silane coupling agent, 1 to 2 parts of nonionic surfactant and 15 to 20 parts of deionized water. The emulsion stability of the waterborne epoxy resin coating is improved through a bisphenol A / F mixed epoxy emulsion and a grafted polyethylene glycol hydrophilic chain segment.

The invention discloses an antibacterial corrosion-resistant coating and a preparation method thereof, and relates to the field of coating materials. The coating is prepared from the following components in percentage by mass: 2 to 5 percent of nano silver ion loaded mesoporous silicon dioxide nano particle antibacterial aid, 5 to 10 percent of zinc powder-containing corrosion inhibitor, 3 to 8 percent of nano montmorillonite, 30 to 40 percent of modified epoxy resin, 20 to 30 percent of polyurethane prepolymer and other aids. The nano silver ion antibacterial auxiliary agent is loaded in mesoporous silica nanoparticles through an ion exchange method, the zinc powder corrosion inhibitor is prepared through stirring and ball milling dispersion, and the modified epoxy resin is modified by adopting a silane coupling agent. The preparation process of the coating comprises the stages of premixing, grinding and refining, initiating polymerization and post-treatment, wherein a grinding medium is zirconium oxide beads with the diameter of 0.5-2 mm. The coating has excellent antibacterial and corrosion-resistant performance, is suitable for metal surface protection, and can effectively solve the problems that an existing coating is not lasting in antibacterial effect, insufficient in corrosion-resistant performance and not ideal in comprehensive performance.

The invention relates to the technical field of new energy, in particular to a nickel-free lithium-rich manganese-based positive electrode material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a precursor: mixing a lithium source, a sodium source and a manganese source according to a stoichiometric ratio of a chemical formula # imgabs0 #, grinding, and calcining in an oxidizing atmosphere to form a P3 type layered precursor; (2) ion exchange: mixing the P3 type layered precursor obtained in the step (1) with a lithium salt, and carrying out sodium-lithium ion exchange through a solid-phase reaction to form a sodium-deficient intermediate; and (3) annealing treatment: carrying out heat treatment on the material subjected to ion exchange to obtain the lithium-rich manganese-based positive electrode material with the O3 type layered structure. According to the invention, only substances composed of three elements of Li, Mn and O are used for synthesizing the positive electrode material, so that the use of materials containing cobalt and nickel is avoided.

A method for separating protein from a milk raw material, the method comprising separating beta-lactoglobulin and alpha-lactalbumin from the milk raw material, the method comprising: a whey separation step for separating whey protein from the milk raw material; a step of ion exchange treatment: adsorbing the whey protein by using strong anion exchange resin, then eluting by using an eluent, adsorbing the whey protein by using strong anion exchange resin to obtain a flow-through liquid, enriching alpha-lactalbumin in the flow-through liquid, and carrying out gradient elution by using the eluent to obtain an elution component, at least one of the elution components is enriched with beta-lactoglobulin; and purifying the flow-through liquid to obtain an alpha-lactalbumin solid, and purifying the elution component enriched with beta-lactoglobulin to obtain a beta-lactoglobulin solid.

The invention discloses a magnetic ion exchange resin and a preparation method thereof, and the preparation method comprises the following steps: preparing a reaction solution which comprises magnetic particles, glycidyl methacrylate, divinylbenzene and a photoinitiator; the mass ratio of the glycidyl methacrylate to the divinyl benzene is (4.5-10): 1; an ultraviolet-initiated polymerization step: irradiating the reaction solution by ultraviolet light to initiate a polymerization reaction to obtain magnetic microspheres; a functional modification step: mixing the magnetic microspheres with an ammoniation reagent for ammoniation reaction to prepare ammoniated magnetic microspheres; and mixing the ammoniated magnetic microspheres with an alkylation reagent, and carrying out an alkylation reaction to prepare the magnetic ion exchange resin. According to the method, the production time is remarkably shortened, the extra energy consumption is reduced, and the process production flow is effectively simplified.

The invention relates to an alkaline activated carbon multi-stage synergistic potassium removal method, and belongs to the technical field of activated carbon materials. According to the method, a four-step synergistic process of water washing, acid pickling, ion exchange and nitrogen calcination is adopted, and a waste acid recycling closed-loop system is combined. The deep removal of residual potassium is realized through the synergistic effect of countercurrent water washing, pH (Potential of Hydrogen) staged regulation and control acid washing, deep potassium removal by ion exchange resin and nitrogen protection calcination, and meanwhile, the high specific surface area is maintained; the pickling waste liquid is neutralized, concentrated and crystallized to be converted into agricultural potash fertilizer, and mother liquid is recycled to form green circulation.

The invention discloses an integrated thermal management system for an explosion-proof charger, and relates to the technical field of chargers. Comprising the following steps: S100, three-dimensional thermal field modeling: acquiring a heat source point cloud by using a laser radar and a temperature sensor array, and constructing a three-dimensional thermal management model in combination with finite element analysis; the liquid cooling pipeline layout is optimized through three-dimensional thermal field modeling (the error of heat flow density uniformity is smaller than or equal to 10%), the integrated design of a ZL114A aluminum alloy shell and a micro-channel liquid cooling plate (the thermal resistance is reduced by 40%) is combined, a metal sealing structure of an IP68 protection grade and ExdIICT6 anti-explosion certification are matched, safe heat dissipation of the power device with the temperature smaller than or equal to 85 DEG C is achieved in the wide-temperature environment of-20 DEG C to 60 DEG C and the explosive environment of gas dust, and the safety of the power device with the temperature smaller than or equal to 85 DEG C is achieved. And meanwhile, the liquid cooling medium is intelligently managed through the conductivity sensor and the ion exchange resin filtering device, so that equipment faults caused by pollution are avoided.

The invention relates to a synthetic method of an ionic liquid and ZIF-8 composite material, which comprises the following steps: S11, adding 2-methylimidazole and octadecyl guanidine chloride into a polyethylene glycol 400 aqueous solution to obtain a solution I; s12, Zn (NO3) 2.6 H2O is added into a polyethylene glycol 400 aqueous solution, and a solution II is obtained; s13, mixing and stirring the solution I and the solution II for reaction, and centrifugally collecting obtained ZIF-8 nanoparticles; s2, adding the ZIF-8 nanoparticles into a sodium phosphotungstate solution, stirring to disperse the ZIF-8 nanoparticles into a suspension, then adding a dodecyl guanidine chloride aqueous solution into the suspension, and carrying out an ion exchange reaction; and centrifuging after the ion exchange reaction is finished. The invention further relates to application of the synthetic method of the ionic liquid and ZIF-8 composite material, and the ionic liquid and ZIF-8 composite material is used for adsorbing 2, 4-D in water. The preparation method is simple, the ionic liquid and the ZIF-8 composite material have good adsorption performance on 2, 4-D in water, and the 2, 4-D is convenient to desorb and is convenient to recycle.

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 belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The invention discloses a stone coal vanadium extraction method, and belongs to the technical field of stone coal vanadium extraction, and the method comprises the following steps: crushing stone coal vanadium ore, and simultaneously carrying out microwave irradiation to obtain an activated sample; immersing the activated sample and an oxidizing agent solution into an acid solution, heating and reacting to obtain a suspension, and carrying out solid-liquid separation to obtain a leachate; then, vanadium in the leachate is adsorbed and enriched through ion exchange resin containing quaternary ammonium groups, and an enriched vanadium solution is obtained through desorption with alkali liquor; then adjusting the pH value of the enriched vanadium liquid, adding an impurity removal agent, uniformly stirring, standing, and carrying out solid-liquid separation to obtain a purified liquid; finally, a precipitator is added into the purified liquid, solid-liquid separation is carried out after the reaction is completed, and the ammonium polyvanadate product is obtained.The method not only can remarkably reduce energy consumption, but also can effectively improve the purity of ammonium polyvanadate.

The invention relates to the technical field of resource recycling of industrial waste liquid, in particular to a cyclic treatment and reutilization method of alkali liquor for chitosan preparation, which comprises the following steps: step 1, on-line monitoring and shunting of the state of the alkali liquor; step 2, multi-stage separation and impurity removal; 3, dynamic regulation and control of ion components: adjusting the flow rate based on the change rate of the conductivity value at the inlet of the ion exchange resin column, and triggering resin regeneration when the pH value at the outlet reaches a regeneration critical point; 4, alkali activity compensation: dynamically supplementing alkali according to the effective alkali concentration of regenerated alkali liquor and the demand of a target recycling process section; and 5, sequential control recycling: injecting fresh alkali liquor when the initial-stage deacetylation reaction is started, and proportionally pumping regenerated alkali liquor when the middle-stage reaction reaches a temperature peak value. According to the method, the quality and the reaction efficiency of the alkali liquor are effectively controlled, various parameters in the production process are optimized through accurate dynamic regulation and control, the recycling rate of the alkali liquor is increased, the production cost is reduced, and the dual effects of environmental protection and energy conservation are achieved.

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 relates to the technical field of glass strengthening, in particular to a microwave-assisted glass strengthening process which comprises the following steps: (1) a preheating stage: preheating glass to 300-350 DEG C for 30-60 minutes by adopting microwaves; (2) superficial layer exchange stage: putting the glass into first fused salt, strengthening for 1-2 hours at the temperature of 390-410 DEG C, and simultaneously adopting low-frequency microwave to assist in strengthening; and (3) a deep exchange stage: putting the glass into second fused salt, strengthening at the temperature of 420-430 DEG C for 3-4 hours, and meanwhile, adopting high-frequency microwaves to assist in strengthening. According to the method, the temperature difference between the surface and the interior is reduced by adopting microwave-assisted glass strengthening and microwave penetrability heating, and microcracks caused by local overheating can be avoided, so that the uniformity of an ion exchange layer is improved, and the method is suitable for strengthening various special-shaped glass; microwaves directly act on reactants, so that the ion exchange time can be shortened by 40-60%, the energy consumption is reduced, and the efficiency is improved.

The invention discloses a preparation method of a mesoporous Zn-ZSM-5 molecular sieve for preparing aromatic hydrocarbon from methanol, and belongs to the technical field of synthesis of inorganic materials. Aiming at the problems that a conventional mesoporous Zn / ZSM-5 molecular sieve catalyst Zn blocks orifices, the mesoporous structure is disordered, the molecular sieve solid yield is low, a molecular sieve framework is seriously damaged and the like, the preparation method comprises the following steps: uniformly mixing zinc gluconate with an aluminum source, a silicon source and a template agent, putting the mixture into a closed reaction container, carrying out hydrothermal crystallization, and sequentially washing, drying and roasting to obtain the mesoporous Zn / ZSM-5 molecular sieve catalyst. The sodium type molecular sieve is obtained; the preparation method comprises the following steps: carrying out multiple ion exchange on a sodium type molecular sieve by using an ammonium chloride solution, and sequentially carrying out suction filtration, washing, drying and roasting to obtain the mesoporous Zn-ZSM-5 molecular sieve. According to the preparation method of the methanol-to-aromatic hydrocarbon Zn / ZSM-5 molecular sieve provided by the invention, the obtained molecular sieve is used in the methanol-to-aromatic hydrocarbon process, and has the characteristics of high carbon deposition resistance, high aromatic hydrocarbon selectivity, low Zn wastage rate and the like.

The utility model discloses a converter station resin replacement system based on the negative pressure jet principle, which comprises a booster pump, a reversing valve, a resin particle bin, an ion exchanger, a water suction pump and a particle recovery bin, an inlet of the booster pump is communicated with a water source through a first valve, and an outlet of the booster pump is communicated with an inlet of the reversing valve through a pipeline provided with a pressure gauge. An outlet of the reversing valve is communicated with an upper inlet of the ion converter through a first pipeline, the first pipeline is communicated with the resin particle bin through a pipeline provided with a second valve, a lower outlet of the ion converter is communicated with an inlet of the water suction pump through a second pipeline, and an outlet of the water suction pump is communicated with the particle recovery bin through a pipeline; most old resin particles are driven to be discharged out of the ion exchanger through high-speed jet flow, air in the new resin storage bin is taken away through the high-speed jet flow, negative pressure is formed to enable the new resin particles to be entrained and sucked into the pipeline, a mixture of the resin particles and water is conveyed into the ion exchanger, and filling of the new resin particles in the ion exchanger is achieved.

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 invention discloses an integrated reaction process for preparing potassium fluoborate through efficient conversion of fluosilicic acid, and relates to the technical field of inorganic fluorine chemical industry, and the potassium fluoborate is prepared through the technologies of complexing metal impurities through EDTA disodium, catalyzing condensation reaction through Fe-TiO2, carrying out K2CO3 / nano gamma-Al2O3 composite desilicication, deeply removing sodium through ion exchange and carrying out mother liquor closed-loop circulation. The problems of serious sodium pollution, low reaction efficiency and resource waste in the traditional process are solved. The composite desiliconization agent improves the desiliconization rate to 96%, the reaction time is shortened by 40% through nanometer catalysis, the mother liquor recycling rate is 80%, and the silicon slag is converted into high-added-value nanometer white carbon black. The product purity is greater than or equal to 99.5%, the sodium residue is less than or equal to 0.003%, and the method is suitable for industrial production of electronic-grade potassium fluoborate.

The invention discloses a preparation method of polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The preparation method comprises the following steps: (1) preparing a high-concentration dimethyl sulfoxide aqueous solution; adding polyvinyl alcohol into the dimethyl sulfoxide aqueous solution, heating and stirring to completely dissolve the polyvinyl alcohol to obtain a mixed solution; (2) putting the mixed solution after standing into a mold, and freezing at low temperature to obtain PVA gel; (3) an electrolyte salt solution is prepared, and the electrolyte salt solution contains low-concentration dimethyl sulfoxide; and placing the PVA gel in an electrolyte salt solution, and carrying out ion exchange to obtain the polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The polyvinyl alcohol-based electromagnetic shielding conductive hydrogel prepared by the method has high transparency, strength and ionic conductivity, the light transmittance reaches up to 75.2%, and the compressive strength reaches up to 2.97 MPa when the strain is 80%; the ionic conductivity can reach 10.34 mS / cm; meanwhile, the effective electromagnetic shielding effectiveness (gt; gt) can still be kept at the low temperature of-60 DEG C for more than 60 hours; 30 dB).

The invention relates to the technical field of synthesis of a polymerization inhibitor DNBP, in particular to an efficient production method of the polymerization inhibitor DNBP, which comprises the following steps: step 1, material preparation: selecting corresponding raw materials, weighing and classifying the raw materials, and dividing the raw materials into three main materials, auxiliary materials and additives, the auxiliary material comprises a sulfonic acid type ion exchange resin catalyst, the additive is an ethanol-water mixed solvent, and during weighing, weighing and proportioning are performed according to the molar ratio of nitric acid to o-tert-butylphenol being 2.15: 1 and the mass ratio of o-tert-butylphenol to carbon tetrachloride being 0.15: 1; according to the method, a gradient temperature control strategy is adopted, and a multi-stage microchannel reactor is combined, so that efficient mass and heat transfer of nitration reaction is realized, deep nitration side reaction is inhibited, the content of dinitro isomer impurities is greatly reduced, meanwhile, the total residence time can be accurately controlled, the explosion risk caused by local overheating in a traditional process is avoided, and the method is suitable for industrial production. The reaction selectivity and the safety are obviously improved.