850 results about "Cationic exchange" patented technology

The invention relates to a novel composite bipolar membrane for preparing low-carbon alcohol alkali metal salt and an electrodialysis process of the novel composite bipolar membrane, and belongs to the technical field of membrane separation and electrochemical synthesis. The composite bipolar membrane comprises a cation exchange layer, a middle catalyst layer and an anion exchange layer which are sequentially laminated and compounded, the process comprises the following steps: introducing a salt solution containing alkali metal ions into an anode chamber of a bipolar membrane electrodialysis system, and introducing a low-carbon alcohol solution into a cathode chamber; applying a direct-current electric field to the two sides of the composite bipolar membrane, so that the low-carbon alcohol is dissociated at the membrane interface to generate alkoxy ions and hydrogen ions; the alkoxy ions migrate to an anode chamber to be combined with the alkali metal ions to generate low-carbon alcohol alkali metal salt; the membrane material is high in adaptability, the membrane structure is good in stability, technological parameters are mature, and the system integration degree is high.

The invention relates to polystyrene cation exchange resin as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a dispersing agent in a solvent to obtain a dispersed phase for suspension polymerization reaction, uniformly mixing a reaction monomer, a cross-linking agent, a pore-foaming agent and an initiator, and carrying out suspension polymerization reaction under segmented stirring and segmented temperature change to prepare copolymer microspheres; and putting the dried microspheres into a reaction kettle, swelling, carrying out sulfonation reaction through a variable temperature program on the basis to obtain sulfonated microspheres, and carrying out alkali exchange reaction on the sulfonated microspheres to obtain the final product cation exchange resin. Compared with the prior art, the cation exchange resin preparation method provided by the invention has the characteristics of simple and feasible process, easiness in large-scale production, low cost, high specific surface area, high adsorption capacity and high separation efficiency, and is especially suitable for separating and purifying substances containing amino groups or aminoglycosidic bonds.

The invention relates to a method for simultaneously preparing lithium hydroxide and sulfuric acid. The invention provides a method for simultaneously preparing lithium hydroxide and sulfuric acid, which comprises the following steps: preparing a bipolar membrane electrodialysis device which comprises a first bipolar membrane, an anion exchange membrane, a cation exchange membrane and a second bipolar membrane, and forming an acid chamber between the first bipolar membrane and the anion exchange membrane, a salt chamber is formed between the anion exchange membrane and the cation exchange membrane, and an alkali chamber is formed between the cation exchange membrane and the second bipolar membrane; a lithium sulfate aqueous solution is added into a salt chamber of the bipolar membrane electrodialysis device, a sulfuric acid aqueous solution is added into an acid chamber, and a lithium hydroxide aqueous solution is added into an alkali chamber; and discharging the desalted solution formed in the salt chamber of the bipolar membrane electrodialysis device, discharging the sulfuric acid aqueous solution formed in the acid chamber, and discharging the lithium hydroxide aqueous solution formed in the alkali chamber.

The utility model provides a purification treatment device, and relates to the technical field of process water treatment. The purification treatment device comprises: a first cation exchange resin tank for adsorbing and extracting at least a part of oligomers and cations in water; a water inlet of a heating medium channel of the first heat exchanger is connected with a water outlet of the first cation exchange resin tank, and the first heat exchanger is used for cooling the entered extraction water; a water inlet of a heating medium channel of the second heat exchanger is connected with a water outlet of a heating medium channel of the first heat exchanger so as to cool the extraction water, so that the temperature of the extraction water flowing out of the heating medium channel of the second heat exchanger is lower than or equal to a first threshold value; the anion exchange resin tank is connected with a water outlet of the heating medium channel of the second heat exchanger; the second cation exchange resin tank is connected with the water outlet of the anion exchange resin tank; and the water outlet of the second cation exchange resin tank is connected with the water inlet of the refrigerant channel of the first heat exchanger. According to the invention, impurities in the extracted water can be removed.

Provided is a cation exchange membrane in which when a hydroxide aqueous solution showing strong alkalinity is produced by using an electrodialyzer, significant swelling in the cation exchange membrane in contact with the hydroxide aqueous solution is suppressed, destruction of a cation exchange resin due to polyvalent cations contained as impurities in a raw material inorganic salt is suppressed, and the capacity of the cation exchange membrane is hardly lowered.　This cation exchange membrane is characterized by having an electric resistance of 2.0-5.0 (Ω∙cm2), as measured at 25ºC in 0.5 mol / L of a NaCl aqueous solution, and a dimensional change rate of at most 1.2%.

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.

A bipolar membrane in which a cation-exchange membrane and an anion-exchange membrane are joined to each other, wherein a leakage ratio of gluconic acid at 60° C. is not more than 1.0%, and the cation-exchange membrane is supported by a polyolefin reinforcing member and, further, contains a polyvinyl chloride.

The invention discloses a method for preparing battery-grade nickel sulfate through collaborative purification of crude nickel sulfate and crude nickel carbonate. According to the method, crude nickel sulfate is dissolved firstly, then crude nickel carbonate is utilized for batch synergistic neutralization, and the alkalinity of the nickel carbonate is effectively utilized to reduce extra acid and alkali consumption. And then through multi-stage fine purification, including Fe oxidation and preliminary precipitation, Cr (VI) reduction and high-pH precipitation, main impurities such as iron, chromium, aluminum and the like are efficiently removed. And after the mother liquor is adsorbed by activated carbon and trace impurities are removed by strong-acid cation exchange resin, vacuum evaporation and concentration are carried out, and seed crystals are introduced for cooling crystallization, so that pure NiSO4. 6H2O crystals are obtained. The whole technological process pays attention to resource recycling, washing water recycling and nickel recycling of nickel-containing filter residues, waste gas and waste liquid are treated, and clean production is achieved. The nickel sulfate product prepared by the method is high in purity, meets the battery grade standard, and has good economic benefits and environmental benefits.

The invention provides a method for recovering nitrogen and phosphorus in wastewater through self-driven bipolar membrane electrodialysis. A system used in the method takes a magnesium negative electrode as a positive electrode and an air electrode as a positive electrode, and a self-driven primary battery is formed through wire connection; and ion exchange membranes with specific sequences are sequentially arranged between the two electrodes to form eight chambers, namely an anode chamber, a nitrogen and phosphorus recovery chamber, a wastewater chamber, a metal ion chamber, an ammonia water chamber, a hydrochloric acid chamber, a buffer chamber and a cathode chamber. During operation, an external power supply is not needed, and ion migration is driven by a self-generated electric field: after Mg < 2 + > and PO4 < 3-> are enriched in the nitrogen and phosphorus recovery chamber and NH4 < + > and Ca < 2 + > migrate to the metal ion chamber, NH4 < + > enters the ammonia water chamber through the monovalent cation exchange membrane, and Ca < 2 + > is separated out and reacts with OH <-> generated by the bipolar membrane to generate Ca (OH) 2 precipitate, so that membrane blockage is effectively prevented, and finally, NH4 < + >, Mg < 2 + > and PO4 < 3-> react to generate high-purity struvite. Zero energy consumption of nitrogen and phosphorus recovery of the wastewater is achieved, no additional chemicals exist, anti-blocking operation is achieved, and both environmental benefits and resource benefits are achieved.

The present application relates to a kind of methods for separating actinium from irradiated thorium target, belong to medical radioisotope manufacturing technical field, solve the problem that thorium element and lanthanide element impurity content in final actinium product in prior art is higher.The present application discloses a kind of methods for separating actinium from irradiated thorium target, first, irradiated thorium target is dissolved, then using cation exchange resin column, UTEVA or TK200 resin extraction column, DGA resin extraction column, LN resin extraction column four-stage series separation purification process, obtain final actinium product.Actinium is efficiently and selectively recovered, and the thorium element and lanthanide element impurity content in final actinium product is significantly reduced.

The invention discloses a soft clay electrochemical reinforcing device and method. The device comprises a power source, an anode, a cathode and a middle grouting pipe. A cation exchange membrane is arranged in the area, close to the cathode, of the to-be-reinforced soil body, only allows cations to migrate from the interior of the soil body to the cathode, and physically prevents anions generated by the cathode electrolytic reaction from reversely diffusing to the soil body; and the cation exchange membrane wraps the outer surface of the cathode or is arranged in the soil body around the cathode as an independent interlayer to form an ion filtering interface completely surrounding the cathode. According to the method, a selectively permeable cation exchange membrane is arranged at the interface of a cathode and a soil body, and a step-by-step grouting process of first anode grouting and then middle grouting pipe grouting is combined, so that the displacement of unit energy consumption is remarkably improved under the same voltage, the settlement amount of the soil body in a cathode area is increased by nearly 4 times, and the construction efficiency is improved. The engineering problem that an anode is hard and a cathode is soft in traditional electroosmosis is solved.

The invention relates to the technical field of water treatment equipment, and discloses a low-salt-consumption intelligent-regeneration water softener and a regenerant dosage accurate control method, the low-salt-consumption intelligent-regeneration water softener comprises: a softening unit, which comprises a tank body (made of food-grade glass fiber reinforced plastic or stainless steel and having a volume of 5-200L), and ion exchange resin (with a type of strongly acidic cation exchange resin, a type of cation exchange resin, a type of cation exchange resin, and a type of cation exchange resin) filled in the tank body; the filling volume accounts for 60%-80% of the effective volume of the tank body), and the multi-way intelligent control valve is installed at the water inlet and outlet end of the tank body. By calculating the residual exchange capacity of the resin in real time (the error is less than or equal to 5%) and dynamically adjusting the feeding amount of the regenerant (accurately matching the actual demand), the fixed excessive feeding (for example, 30-50% of more salt is added) of traditional equipment is avoided, the salt consumption is reduced by 40-70% compared with that of a traditional water softener (for example, 1.5 kg of salt is used for regeneration each time in the prior art, and only 0.45-0.9 kg of salt is needed in the invention); regeneration is triggered on the basis of the actual residual capacity of resin, and the problem of too early regeneration or too late regeneration caused by fluctuation of water consumption of traditional equipment is solved.

The utility model discloses an anion and cation double-membrane type electrodeionization device. The device internally comprises a cathode chamber, a resin chamber and an anode chamber; the cathode chamber and the resin chamber are isolated by a cation exchange membrane, the anode chamber and the resin chamber are isolated by an anion exchange membrane, and the distance between the two membranes is 10-100cm. According to the utility model, the electric regeneration efficiency of the invalid resin and the quality of subsequent produced water can be obviously improved, electrolyte solution is not consumed, the environmental protection problem is avoided, an electrode water circulating pump can be omitted, and the system and operation management are simplified.

The application discloses a microbial electrochemical system device and method for realizing wastewater treatment, CO2 fixation and in-situ synthesis of microbial protein synchronously, which comprises an anode chamber, a cathode chamber, a protein production chamber, a power supply, a mixed gas tank and a peristaltic pump; the anode chamber, the cathode chamber and the protein production chamber are sequentially arranged from left to right; a cation exchange membrane is arranged between the anode chamber and the cathode chamber; a cation exchange membrane is also arranged between the cathode chamber and the protein production chamber; an anode is arranged in the anode chamber and connected with the positive pole of the power supply through a wire, and a resistor is arranged on the wire connecting the anode and the positive pole of the power supply. The microbial electrochemical system and the protein production system are coupled to form an ammonia-nitrogen recovery-in-situ protein synthesis microbial electrochemical system, the system can convert active nitrogen into high-value protein products in-situ, the system can synchronously treat wastewater, recover ammonia-nitrogen and fix carbon dioxide, and has excellent environmental benefits.

The invention belongs to the technical field of earth and rockfill dam deep burying disease identification and positioning, and discloses an earth and rockfill dam leakage channel comprehensive detection method and system, and the method comprises the steps: determining the distribution of detection points detected by an electrical method, and collecting the apparent resistivity data and the apparent polarizability data of the detection points; inverting apparent resistivity and apparent polarizability data to obtain a resistivity profile and a polarizability profile, and obtaining a normalized polarizability profile based on the resistivity profile and the polarizability profile; performing stratum zoning on the to-be-detected area based on the section, determining the soil cation exchange capacity and the cementation index of the zoned stratum, and calculating the soil water content and the permeability of the measured section according to the normalized polarizability, the soil cation exchange capacity and the cementation index; and determining an earth and rockfill dam leakage channel according to a water content and permeability judgment mechanism. According to the method, the uncertainty of a single physical property threshold value method is overcome, and the accuracy and precision of the leakage hidden danger of the earth and rockfill dam are improved.

The invention relates to a device for deeply purifying waste amine liquid, a membrane stack of the device sequentially comprises a plurality of repeated membrane pool units and first cation exchange membranes from an anode plate to a cathode plate, and each membrane pool unit in the repeated membrane pool units comprises a second cation exchange membrane, a first anion exchange membrane and a second anion exchange membrane which are sequentially arranged, and ion exchange resin is filled between the first anion exchange membrane and the second anion exchange membrane. According to the device, the ion exchange resin is filled between the first anion exchange membrane and the second anion exchange membrane, and the first cation exchange membrane is arranged between the membrane pool unit and the cathode plate, so that electrodialysis and the ion exchange resin are organically coupled together, the respective advantages are fully exerted, and the defects in the electrodialysis and the ion exchange resin are complemented; and the effect of one plus one greater than two is achieved. The invention also relates to a method for deeply purifying the waste amine liquid.

The invention relates to the technical field of compound extraction and separation, and discloses a method for extracting and separating 1-deoxynojirimycin from mulberry leaves, which comprises the following steps: S1, mulberry leaf pretreatment: crushing and sieving mulberry leaves to obtain mulberry leaf powder; s2, extracting: extracting mulberry leaf powder by adopting a mixed solvent of water and ethanol, repeatedly extracting twice, and combining extracting solutions; s3, preliminary impurity removal; s4, chromatographic purification: S401, enabling the supernate to pass through a strong acid cation exchange resin column, eluting with deionized water, then eluting with an ammonia water solution, collecting eluent, and adjusting the eluent to be neutral to obtain neutral feed liquid; s402, enabling the neutral feed liquid to pass through a macroporous adsorption resin column, eluting with deionized water, then eluting with an ethanol solution, and collecting a target eluent containing 1-deoxynojirimycin; and S5, post-processing. Adsorption and separation of DNJ are sequentially carried out through a two-step chromatography process of strong acid cation exchange resin and macroporous adsorption resin, and various impurities are effectively removed.

The invention relates to the technical field of sewage treatment, in particular to an urban sewage treatment plant sludge deep dehydration conditioner and an application method thereof, and the urban sewage treatment plant sludge deep dehydration conditioner comprises the following raw materials: functional layered composite powder, cationic polyacrylamide, diatomite and sodium carbonate. After the functionalized layered composite powder and the bentonite are organically modified by the lauryl trimethyl ammonium bromide, the interlayer spacing is obviously increased, the hydrophobic property and the cation exchange capacity are excellent, negative charges on the surface of sludge colloid can be efficiently neutralized, a double-electrode-layer structure can be destroyed, and part of bound water can be released; ferric hydroxide deposited on the surface serves as amphoteric metal hydroxide, further compresses double electric layers through electric neutralization, forms an amorphous net structure and serves as a high-efficiency adsorption flocculation net to capture fine sludge particles; under the synergistic effect of the powder and cationic polyacrylamide, efficient removal of water combined with sludge and water in cells is achieved, and the dual purposes of deep dehydration and mud cake volume reduction are achieved.

The invention relates to the field of industrial online monitoring and chemical analysis, and particularly discloses a performance evaluation method of a cation exchange column in hydrogen conductivity measurement. The method comprises the following steps: acquiring multi-dimensional time sequence data of an ion exchange column through a multi-modal sensor array, and after collaborative cleaning and quality checking, extracting a mixed feature set reflecting the running state and the degradation trend of the ion exchange column by utilizing dynamic feature engineering; the features are input into a hybrid intelligent evaluation model fusing an improved Thomas mechanism model and machine learning models such as LSTM-Attention and Transform, and health degree scoring, residual life prediction and degradation mode recognition are achieved; finally, state verification and root cause positioning are carried out in combination with a virtual twinborn model based on CFD and reaction kinetics, and hierarchical maintenance decision suggestions are generated. According to the invention, early sensitive perception, accurate evaluation and predictive maintenance of the performance of the cation exchange column are realized, and the reliability and intelligent operation and maintenance level of hydrogen conductivity measurement are effectively improved.

The invention relates to the technical field of biochemical engineering, in particular to a method for extracting high-purity Ectoine from Ectoine mother liquor. According to the method, the Ectoine mother liquor is purified into high-purity Ectoine solid through the steps of chromatographic separation, ion exchange process, concentration and decoloration and crystallization in sequence; chromatographic separation adopts a specific filler (silica gel bonded octadecylsilane (C18) or a strong cation exchange resin filler), and separation is carried out at room temperature by controlling the sample size and the flow rate; in the ion exchange process, strong-acid cation exchange resin and strong-base anion exchange resin are connected in series to remove cation and anion impurities; concentrating and decoloring through vacuum concentration and activated carbon decoloring; and adding low-molecular alcohol for cooling crystallization, and carrying out spinning filtration and drying to obtain high-purity Ectoine solid. According to the method, the purity of Ectoin can reach 99% or above, and the method has the advantages of being low in cost, environmentally friendly and suitable for large-scale industrial production.

The utility model provides a sewage pollutant treatment device. The sewage pollutant treatment device comprises an anode chamber, a cathode chamber, a cation exchange membrane, an aeration structure and a data acquisition system, the anode chamber contains electrogenesis bacteria liquid containing electrogenesis bacteria; an anode carbon rod is inserted into the anode chamber and is filled with an anode graphite carbon felt; a cathode carbon rod is inserted into the cathode chamber, and a cathode graphite carbon felt is arranged on the cathode carbon rod; the cation exchange membrane is arranged between the anode chamber and the cathode chamber, and the cation exchange membrane is a proton exchange membrane; the conventional pollutants in the sewage are decomposed by utilizing electrogenesis bacteria in an anode solution in the anode chamber, chemical energy is converted into electric energy, and electrons and protons are generated; electrons reach the cathode through an external circuit, and protons are transmitted to the cathode chamber through the cation exchange membrane; the aeration structure is communicated with the cathode chamber, oxygen dissolved in the cathode chamber is combined with electrons and protons to generate H2O2, then the H2O2 and Fe < 2 + > are subjected to a Fenton reaction to generate hydroxyl radical.OH, and the hydroxyl radical.OH mineralizes novel pollutants in a cathode solution.

The invention relates to the field of pipes, and discloses a heat-resistant high-strength MPP cable protection pipe and a preparation method thereof.The cable protection pipe comprises polypropylene resin, composite filler, modified layered lanthanum phenylphosphonate and auxiliaries; the composite filler is prepared by carrying out amino functional covalent modification on halloysite nanotubes by using a modified silane coupling agent, then carrying out protonation treatment and carrying out cation exchange on nano montmorillonite grafted with the modified silane coupling agent, and the modified silane coupling agent is prepared by reacting gamma-methacryloxypropyltrimethoxysilane with polyether amine; the modified layered lanthanum phenylphosphonate is prepared by grafting and modifying the surface of the layered lanthanum phenylphosphonate by using a cyclotriphosphazene substitute, the cyclotriphosphazene substitute is prepared by reacting 4-amino-1, 2, 4-triazole with p-hydroxybenzaldehyde and then substituting with phosphonitrilic chloride trimer, and the prepared MPP cable protection tube has the advantages of good tensile property, high impact resistance, high heat resistance, good flame retardancy, good flame retardancy and good flame retardancy. Meanwhile, excellent flame retardance and antibacterial effect are achieved.

The invention provides a method for detecting related substances of sucrose octasulfate salt auxiliary materials, and particularly relates to the field of medicines. An SCX cation exchange chromatography filler and a C18 filler are mixed according to the ratio of (0.8-1.2): (3-5) to serve as a filling agent; the specification of a chromatographic column is CAPCELLPAK CR C18 + SCX 5 [mu] m, 250 * 4.6 mml.D.; 18-22 mM / L ammonium formate and 0.08-0.12% formic acid are used as a mobile phase A, and acetonitrile is used as a mobile phase B; a detector is CAD, the spray temperature is High, the collection frequency half-peak width is 0.1-0.2 min, the column temperature is 28-32 DEG C, the flow rate is 0.8-1.2 ml / min, and the sample injection volume is 4-6 [mu] l; wherein acetonitrile and water in a ratio of (3-5): (5-7) are used as diluents, and gradient elution is carried out; the method provided by the invention can effectively separate and accurately analyze each impurity, has strong specificity and good separation degree, and can effectively control the product quality.

This invention provides an ion exchange apparatus that can achieve excellent utilization efficiency of ion exchange resins in the purification of organic compound salt solutions using ion exchange resins. [Solution] An ion exchange apparatus for purifying an organic compound salt solution, comprising a plurality of ion exchange resin layers arranged along the flow direction of the organic compound salt solution, wherein each of the plurality of ion exchange resin layers is formed of either a cation exchange resin or an anion exchange resin, the plurality of ion exchange resin layers are separated from each other by spaces not filled with ion exchange resin, 1 to 11 such spaces are provided, and the total height of the ion exchange resin layers / the flow channel area of ​​the ion exchange resin layers is 0.2 to 2.5 cm². -1 A device that is.

The invention discloses a preparation method of a cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode rich in oxygen vacancies and application of the cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode in the field of photoelectrocatalysis. The electrode is suitable for innocent treatment of nitrate-containing high-salinity wastewater. According to the preparation method, a cobalt-doped defect-state titanium dioxide photoelectrode is prepared by utilizing a hydrothermal method and a cation exchange method, a three-dimensional nanoflower hierarchical structure is presented, cobalt-oxygen vacancy double active sites are constructed, and low-concentration nitrate can be efficiently and highly selectively removed to nitrogen through photoelectrocatalysis. The method has the prominent characteristics that the method is applicable to a wide pH value range, and the nitrate wastewater has good adaptability and operation stability. The corresponding preparation method is simple to operate, and a reliable and highly feasible solution is provided for solving the problem of nitrate-containing wastewater treatment.

The utility model discloses equipment for treating waste gas by using ion exchange resin, and mainly relates to the technical field of waste gas treatment, a liquid spraying tank is communicated with a first spraying liquid inlet and a second spraying liquid inlet through a first liquid pump, the first spraying liquid inlet is provided with a first valve, the second spraying liquid inlet is provided with a second valve, and the first valve is provided with a second valve; the first pneumatic stirrer is arranged in the liquid spraying tank and is used for stirring the spraying liquid in the liquid spraying tank; a liquid outlet of the first medicine storage tank is communicated with a liquid inlet of the liquid spraying tank through a second liquid pump; a liquid outlet of the second medicine storage tank is communicated with a liquid inlet of the liquid spraying tank through a third liquid pump and a third valve; a liquid outlet of the cation exchange column is communicated with a liquid inlet of the liquid spraying tank through a fourth valve, a waste gas treatment water outlet is connected with the liquid inlet of the cation exchange column through a fourth liquid pump and a fifth valve, and a tap water source is connected with the liquid inlet of the cation exchange column through a sixth valve. And the use convenience is improved.

The invention relates to a water-soluble ultraviolet absorbent 4-disubstituted aminobenzyl subunit camphorsulfonic acid and a synthesis method and application thereof, and the synthesis method comprises the following steps: in a toluene-methanol mixed solvent, carrying out heating reflux reaction on camphorsulfonic acid and 2 equivalent weight of sodium methoxide, and after enolation conversion is completed, carrying out reduced pressure distillation to obtain the 4-disubstituted aminobenzyl subunit camphorsulfonic acid. Slowly dropwise adding a corresponding 4-disubstituted aminobenzaldehyde solution with the molar weight equal to that of camphorsulfonic acid, continuously heating and stirring to react for 6-12 hours, adding water to terminate the reaction, acidifying the reaction solution by using hydrochloric acid or sulfonic acid type cation exchange resin, separating to remove methylbenzene, adjusting the pH value of a water phase to about 6.5, performing rotary evaporation dehydration under reduced pressure, and extracting a crude product by using a conventional method; a target product can be obtained through column chromatography purification, and the target product not only has water solubility, but also has the characteristic of absorbing UVA and UVB ultraviolet light at the same time; the composition can be applied to sun-screening agent products, cosmetics or home care products, and also can be applied to various industrial products such as paint, varnish, plastics, textiles and rubber to improve the light resistance of the industrial products.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

A wastewater regeneration device includes an electrolytic cell, multiple cation exchange membranes, and at least one anion exchange membrane. The cation exchange membranes and anion exchange membranes are alternately and spaced apart within the electrolytic cell to divide the cell into two electrode chambers, at least one first compartment, and at least one second compartment. Each first compartment is configured to receive anion-containing wastewater and regenerate it into a chemical reagent. Each second compartment is configured to receive anions from the anion-containing wastewater via the anion exchange membrane and cations from the anion-containing wastewater or electrolyte via the cation exchange membrane, and to synthesize an acid solution using the anions and cations. A surface treatment process system incorporating the wastewater regeneration device is also proposed, as well as a wastewater regeneration method utilizing the wastewater regeneration device.