125 results about "Chelating resin" patented technology

The invention relates to the field of electroplating sludge, and particularly discloses a selective separation and resource recycling method for copper in electroplating sludge. The method comprises the following steps: mixing and roasting electroplating sludge and sodium salt, and washing with water to obtain filter residues; then carrying out acid leaching on the filter residues to obtain an acid leaching solution containing iron, copper, nickel and zinc; then enabling the pickle liquor to sequentially pass through a first ion exchange column filled with monophosphate group chelating resin and a second ion exchange column filled with copper selective functionalized resin to selectively adsorb iron ions and copper ions respectively; then desorbing the resin adsorbing the copper by using an acid solution to obtain a copper-containing eluent; and finally, carrying out evaporation concentration and recrystallization treatment to obtain a high-purity copper salt product. According to the method, the separation selectivity and the recovery efficiency of copper in the electroplating sludge are fundamentally improved by adopting a chelating resin combination with specific functional groups and an optimized acid leaching-adsorption series process.

The invention provides a purification method of a naphthalimide high-purity electronic-grade photoacid generator. The method solves the problem that photo-acid cannot be purified by traditional recrystallization or directly through ion exchange columns and other methods. The method comprises the following steps: firstly synthesizing and preparing 1, 3-diketone-2-hydroxy-6-(1-hexyne) benzisoquinoline, then reacting with triethylamine and trifluoromethylsulfonyl chloride to generate a crude product 1, 3-diketone-2-(1, 1, 1-trifluoromethyl) methanesulfonic ester-6-(1-hexyne) benzisoquinoline, removing impurities from normal hexane to obtain a pure product, sublimating the material into a gas phase by using a quartz vacuum sublimation instrument, and purifying to obtain the 1, 3-diketone-2-(1, 1, 1-trifluoromethyl) methanesulfonic ester-6-(1-hexyne) benzisoquinoline. And then passing through Pure MTS9500 amino phosphonic acid type chelating resin, and finally cooling in a quartz tube to obtain the high-purity electronic-grade photoacid generator. According to the invention, the stability is high, the metal ion content is low, the purification process is convenient to process, the product is used as a photoresist-level core main material, the product is widely applied in the fields of semiconductor photoresist, other imaging systems, photocureable coatings and the like, the market scale is continuously expanded, and the product is an indispensable key material in semiconductor manufacturing and other related fields.

This invention discloses a method for deep removal of calcium and magnesium from battery-grade manganese sulfate solution, belonging to the field of hydrometallurgical technology. The invention employs a three-stage purification process: pretreatment for impurity removal, gradient precipitation with manganese fluoride, selective extraction, and chelating resin refinement. First, the manganese sulfate leachate undergoes pretreatment to remove iron, aluminum, and heavy metals. Then, an in-situ / direct addition of manganese fluoride precipitation system using magnesium fluoride seeding and gradient fluoride supplementation efficiently removes most calcium and magnesium impurities from the solution, achieving a single-precipitation rate of over 93% for magnesium ions. Subsequently, a P507 / Cyanex272 / TBP compound saponification organic system is used with a reverse extraction logic of "extracting calcium and magnesium while retaining manganese in the aqueous phase" to precisely remove residual calcium and magnesium, avoiding the problems of competition between manganese and calcium and low magnesium extraction efficiency in traditional extraction methods. Finally, trace amounts of calcium, magnesium, and residual fluoride ions are completely removed through aluminum salt complexation for fluoride removal combined with deep refinement using aminocarboxylic acid chelating resin. This invention introduces no foreign impurities such as sodium and ammonium throughout the entire process, has a wide process window and strong industrial stability, and the final purified manganese sulfate solution can stably meet the high-end battery-grade index requirements of Ca²⁺≤5mg / l, Mg²⁺≤5mg / l, and F⁻≤1mg / l, making it suitable for the large-scale production of high-purity manganese sulfate, a raw material for lithium battery cathodes.

The utility model discloses a hydrochloric acid double -layer filter equipment, including primary filter casing, the support frame is fixedly connected on the primary filter casing outer wall, the support frame is fixedly connected with the secondary filter casing below primary filter casing, the lower portion of secondary filter casing top is linked together with the primary filter casing through a pipeline, the lower portion of secondary filter casing is linked together with the drain pipe, the end of drain pipe is equipped with drain valve no.

This invention relates to the field of high-purity material analysis technology, and discloses a method for simultaneously separating and enriching copper, cadmium, nickel, cobalt, zinc, lead, and barium in lithium carbonate. The steps are as follows: dissolving a lithium carbonate sample in nitric acid to obtain an acidified sample solution; adjusting the acidified sample solution to an alkaline pH range of 9.5-10.5 using an ammonia-ammonium acetate alkaline buffer solution; passing the alkaline solution through a solid-phase extraction column filled with iminodiacetic acid-type chelating resin, where copper, cadmium, nickel, cobalt, zinc, lead, and barium ions are selectively adsorbed onto the resin; and eluting the adsorbed heavy metal ions with acid to achieve separation and enrichment. This invention effectively overcomes the inhibition and interference of the lithium carbonate matrix on the detection of trace heavy metals, and in particular significantly improves the adsorption and recovery rate of elements such as barium. It achieves efficient separation and enrichment of multiple heavy metals in complex matrices, providing a reliable pretreatment solution for high-sensitivity and high-accuracy quality control analysis of lithium carbonate products.

The application provides a purification method of lithium fluoride, high-purity lithium fluoride, lithium hexafluorophosphate, an electrolyte and a device, and the purification method of the lithium fluoride comprises the following steps: performing water washing treatment on the lithium fluoride to be purified at 0-50 DEG C to obtain a mixture containing a first solid-phase product; performing ultrasonic treatment on the mixture at 20-25 kHz to obtain a second solid-phase product through filtration; performing fluorination reaction on the second solid-phase product with electronic-grade anhydrous hydrofluoric acid to obtain a third liquid-phase product; performing ion exchange on the third liquid-phase product by using a chelating resin at 0-80 DEG C, and then performing cooling evaporation crystallization, and obtaining a fourth solid-phase product through filtration; and performing cleaning treatment on the fourth solid-phase product by using inert gas at 150-250 DEG C to obtain high-purity lithium fluoride. The high-purity lithium fluoride obtained by the purification method has low content of lithium carbonate and other impurities, and is beneficial to improving the performance and stability of subsequent products.

The invention belongs to the technical field of integrated circuit materials, and particularly relates to mixed resin for deeply removing metal impurities in a photoresist solution and a method thereof. The mixed resin comprises chelating resin, modified resin and macroporous adsorption resin. The method disclosed by the invention comprises the step of enabling a photoresist solution to pass through the PFA column filled with the mixed resin disclosed by the invention. The metal impurities of the photoresist solution purified by the mixed resin can be less than or equal to 15ppb, and the purified photoresist solution is neutral. The mixed resin and the method disclosed by the invention are particularly suitable for treating a photoresist solution with acid-unstable components, and have wide application prospects and good economic benefits in the field of integrated circuit materials.

This invention provides a method for recovering and preparing ferric phosphate from ferric phosphorus slag. The method includes the following steps: leaching the ferric phosphorus slag with phosphoric acid, separating the solid and liquid phases to obtain a leachate; mixing iron powder with the leachate to perform a copper removal reaction, obtaining a copper-removed liquid; using a chelating resin to adsorb aluminum from the copper-removed liquid, obtaining an aluminum-removed liquid; subjecting the aluminum-removed liquid to oxidation and crystallization to obtain ferric phosphate slurry; and after solid-liquid separation, washing, and drying, obtaining orthorhombic ferric phosphate and mother liquor; the oxidant used in the oxidation is hydrogen peroxide. The method for recovering and preparing ferric phosphate from ferric phosphorus slag provided by this invention uses only phosphoric acid as the leaching agent and pH buffer system. The synthesis process relies on the self-buffering properties of phosphate-dihydrogen phosphate to regulate the crystallization reaction, completely avoiding the auxiliary material consumption caused by acid-base neutralization in traditional wet processes; it also has lower costs and yields orthorhombic ferric phosphate with higher purity, meeting the requirements for battery applications.

This invention discloses a softening treatment device and method for high-temperature oilfield wastewater, relating to the field of wastewater treatment technology. Oilfield wastewater enters a pre-desorption tank for impurity removal. The barium-strontium adsorption tank contains, from top to bottom, a fine quartz sand layer, a chelating resin layer, and a coarse quartz sand layer. The silicate pre-desorption tank contains an acid-base regulator, a dispersant, and a magnesium oxide suspension. The carbonate softening tank contains a dispersant, a coagulant aid, a soda ash solution, and a chelating agent. The stabilizing tank contains, from top to bottom, a modified activated carbon layer and an exchange resin layer. This invention uses the pre-desorption tank to initially separate oil, suspended solids, and corrosion products. A specialized chelating resin selectively adsorbs barium-strontium ions. In the silicate pre-desorption tank, pH is precisely controlled and magnesium oxide is added to directionally generate settleable magnesium silicate flocs. In the carbonate softening tank, crystal form control and coagulation aid work synergistically to promote the precipitation of calcium and magnesium in the form of large calcite particles.

The present application relates to the technical field of phosphoric acid production, and particularly relates to a method and device for purifying and preparing electronic-grade phosphoric acid by using microwave temperature control technology. The method comprises the following steps: S1, using a composite impurity removal agent to perform chemical precipitation pretreatment on industrial-grade wet-process phosphoric acid, and adjusting the concentration after solid-liquid separation; S2, performing microwave temperature control concentration on the pretreated liquid at a vacuum degree of 0.085-0.095 MPa and a temperature of 160-220 DEG C to obtain a concentrated liquid with P2O5 of 85% or more; S3, performing crystallization, sweating and chelating resin ion exchange deep impurity removal on the concentrated liquid; and S4, performing decolorization, super-clean filtration and dilution and filling to obtain electronic-grade phosphoric acid finished products. The present application also provides a special device. The present application is coupled by microwave concentration and multi-stage deep impurity removal, the concentration efficiency is improved by 30%-50%, the energy consumption is reduced by more than 30%, the finished product metal impurity is less than or equal to 10 ppb, and the finished product meets the GB / T1282-2011 standard; the device adopts high-purity PTFE anticorrosion lining to avoid secondary pollution and is suitable for large-scale industrial production.

A metal-chelating resin includes (a) a compound represented by Formula (I):or a stereoisomeric form thereof or a salt thereof, wherein R1, R2, R3, R4, Ra, Rb, Rc and Rd are as defined herein; and (b) an organic polymer resin having at least one complementary reactive functional group covalently linked with at least one linking group of the compound represented by Formula (I).

The invention relates to the technical field of electrolytic manganese, in particular to a method for increasing the manganese electrolysis yield. The method comprises the following steps: filtering a manganese sulfate and ammonium sulfate composite solution, and then adjusting the pH value to obtain a purified solution; the filtering treatment comprises chelating resin filtering and / or precise filter element filtering; the purified liquid is subjected to electrolytic deposition under the first cathode pulse average current density, the second cathode pulse average current density and the third cathode pulse average current density in sequence, and electrolytic manganese metal is obtained; the average current density of the first cathode pulse and the average current density of the third cathode pulse are 50-70 A / m < 2 > lower than the average current density of the second cathode pulse; and the electrolytic manganese metal is passivated and dried. The method provided by the invention can effectively inhibit cathode manganese from flaking, and has the advantages of remarkably improving the product yield and the like.

The invention discloses a process for removing calcium ions and magnesium ions from nitrate-containing quaternary system brine, and relates to the technical field of brine treatment. The method comprises the following steps: filling a single column with modified composite resin, enabling the nitrate-containing quaternary system brine to pass through the column, and collecting outlet liquid to obtain the calcium ion and magnesium ion removed nitrate-containing quaternary system brine. Wherein the modified composite resin is prepared by the following steps: pretreating phosphoramidate chelate resin with dopamine, compounding the pretreated phosphoramidate chelate resin with nano-crystalline cellulose, a synergist and functionalized carbon quantum dots, cross-linking with a silane coupling agent KH560, and finally soaking with acid and alkali and purifying. The nano cellulose, the synergist, the functionalized carbon quantum dots and the like are introduced, and a specific process method is matched, so that the calcium and magnesium adsorption capacity, the permeation wear impact force resistance, the pollution resistance and the lithium loss resistance of the treatment process are effectively improved. Therefore, the treatment process disclosed by the invention has a wider application prospect.

This application discloses a method for preparing electronic-grade sodium fluoride from polyetheretherketone (PEEK) cleaning water, belonging to the field of chemical synthesis technology. The method uses cleaning water generated during PEEK production as raw material. After distillation to remove organic solvents, the water is neutralized with hydrogen fluoride, purified by adsorption with activated carbon and chelating resin, and concentrated and crystallized to obtain crude sodium fluoride. This crude sodium fluoride is then pulped with solvent and dried to obtain the finished electronic-grade sodium fluoride. This application effectively solves the problem of resource utilization of fluoride-containing wastewater in the PEEK manufacturing industry, realizing "turning waste into treasure," promoting the development of a green circular economy in the PEEK industry, and providing high-quality and inexpensive electronic-grade sodium fluoride raw material for the sodium-ion battery industry.

The invention relates to a high-adhesion anti-stripping primer special for a metal substrate and a preparation method thereof, and belongs to the technical field of paints.The primer comprises silane modified phosphoramidate chelating resin, graphite oxide-Schiff base zirconium-siloxane hybrid filler, a hyperbranched polyamide-siloxane bonding accelerant, an isocyanate curing agent, functional auxiliaries and the like. The silane modified phosphoramidate chelating resin is prepared by carrying out a reaction on bisphenol F epoxy resin and diethylenetriamine, and carrying out a reaction on p-toluenesulfonic acid, diethyl phosphite, KH540 and hydroquinone. The graphite oxide-Schiff base zirconium-siloxane hybrid filler is prepared from the following components: GO-SB, ZrO2-siloxane core-shell particles, zirconium n-propoxide and the like. The hyperbranched polyamide-siloxane bonding accelerator is prepared by the following steps: reacting ethylenediamine with methyl acrylate, then reacting with ethylenediamine, and then modifying with KH540 and perfluoroalkyl phosphate. The problems that a traditional primer is weak in interface bonding force, easy to peel off and insufficient in corrosion resistance are solved.

The invention belongs to the technical field of metallurgical engineering, and mainly relates to a method for extracting mercury from mercuric sulfide by a wet process based on composite leaching and modified resin adsorption. The method comprises the following steps: adding dilute sulphuric acid into mercuric sulfide concentrate, stirring for reaction, and filtering to obtain impurity-removed mercuric sulfide; mixing the impurity-removed mercuric sulfide with a composite leaching solution, stirring and leaching to obtain a mercury-containing complexing solution; the composite leachate is a mixed solution of a complexing agent and ferric sulfate; and adsorbing the mercury-containing complexing solution through modified thiourea type chelating resin, desorbing to obtain a mercury-containing desorption solution, and carrying out electrolytic deposition on the mercury-containing desorption solution to obtain metal mercury. The method realizes reselection of mercuric sulfide, efficient extraction of flotation concentrate, resource circulation of wastewater and harmless utilization of solid waste, has remarkable advantages in leaching efficiency, environmental protection property and raw material adaptability, and shows a wide industrial application prospect.

The invention relates to a power plant desulfurization wastewater treatment method and system.The treatment method comprises the steps that desulfurization wastewater is mechanically filtered through a bag filter, and pretreated wastewater with the turbidity smaller than or equal to 5 NTU is obtained; adding modified activated carbon or a chelating resin adsorbent into the pretreated wastewater, and adsorbing heavy metal ions; the pretreated wastewater is introduced into a multi-stage membrane separation system for water-salt separation, and strong brine and recyclable fresh water are obtained; introducing the strong brine into a forced circulation evaporation crystallizer for evaporation and concentration to obtain inorganic salt crystals. Through a synergistic process of mechanical filtration, multi-stage membrane separation, evaporative crystallization and heavy metal adsorption, suspended solids, heavy metals and excessive salts in the high-salinity wastewater are efficiently removed, the separation purity and recovery rate of resources such as gypsum and sodium chloride are improved, the energy consumption of evaporative crystallization and the treatment cost are reduced, and the method is suitable for industrial production. The requirements of pollution treatment, cost control and resource recovery are effectively balanced, and the economic bottleneck in the prior art is broken through.

This invention discloses a high-efficiency sodium bromide recovery process for PTA wastewater, belonging to the technical field of wastewater treatment and bromine resource recovery and utilization in the production of purified terephthalic acid. The process includes the following steps: Pretreatment softening: A stream of bromine-containing wastewater generated during the production of purified terephthalic acid is provided. The bromine-containing wastewater is introduced into a chelating resin unit at a volume hourly space velocity (VHSV) to remove calcium and magnesium ions from the bromine-containing wastewater, resulting in softened water. Through a re-filtration enhanced salt separation step, the physical washing effect of the dialysis water is utilized to effectively wash the retained bromide ions into the product water side, overcoming the Donnan effect at high concentrations. Through an acidification and decarbonation step, the wastewater is transformed from a complex ternary system of carbonates, bromides, and sulfates into a simple binary system of sulfates and bromides, eliminating the interference of carbonate ions on the membrane system.

The application relates to an iminodiacetic acid type chelating resin and a preparation method and application thereof, and the preparation method comprises the following steps: (1) in the case that the stirring speed is 200-350 r / min, two dispersants are dissolved in water, then ethylbenzene, glycidyl methacrylate, trimethylolpropane trimethacrylate, isooctane and di-t-butyl peroxide are added, the raw materials are reacted after ultrasonic mixing, centrifugal separation is carried out after the reaction is completed, the filter cake is cleaned and dried, and resin microspheres are obtained; (2) in the stirring state, the resin microspheres obtained in the step (1) are added into water, then iminodiacetic acid is added, stirring is continued, then preliminary reaction is carried out by heating, NaOH is further added, reaction is carried out by heating, after the reaction is completed, filtration, cleaning and drying are carried out, and the iminodiacetic acid type chelating resin is obtained. The chelating resin particle size can be controlled, the particle size is relatively large, the specific surface area is large, the adsorption capacity is high, and the chelating resin can be used for adsorbing lead ions in heavy salt matrix.

Provided is a method for purifying an organic solvent and a device for purifying an organic solvent, with which it is possible to reduce the amount of impurities such as metal impurities of as many kinds as possible from the organic solvent. The method for purifying an organic solvent includes an anion exchanger contact step for bringing an organic solvent to be purified into contact with an anion exchanger A and an anion exchanger B, wherein: the anion exchanger A is an anion exchanger having at least one ionic form that is selected from the group consisting of an OH form, a free base form, a carbonate form, and a bicarbonate form; and the anion exchanger B is a chelate resin that contains a glucamine-type ion exchange group.

The present application relates to the field of chemistry, and provide a kind of preparation method of glycyrrhizin dipotassium salt based on chelating resin deep removal heavy metal, comprising the following steps: glycyrrhizin monoammonium salt is added to alkaline pure water solution, stirring, adjust pH to 7.5~8.5, obtain solution;The obtained solution is passed through mixed resin column, flush mixed resin column, combine effluent, concentrate and dry, obtain glycyrrhizin dipotassium salt;Wherein, the mixed resin in the mixed resin is the composition of cation exchange resin and new chelating resin.The preparation method of the present application is simple and reasonable, green and environmental protection, in the preparation process, using cation exchange resin and new chelating resin promote glycyrrhizin dipotassium salt purification, so that the residual alcohol content in the obtained glycyrrhizin dipotassium salt is ≤500mg / kg, residual ammonia content is ≤40mg / kg, and lead, cadmium, arsenic, mercury content is all ≤0.2mg / kg.

The invention discloses a preparation method of 2, 5-furandicarboxylic acid, which comprises the following steps: pretreatment: dissolving a 2, 5-furandicarboxylic acid crude product in a solvent to form a mixed solution; resin adsorption: enabling the mixed solution to pass through chelating resin, and collecting effluent; chemical decoloration: adding a reducing agent into the effluent, stirring to react, filtering, adding hydrogen peroxide, stirring, reacting, and filtering to obtain filtrate; adsorbing and decolorizing: adding a composite adsorbent into the filtrate, stirring and decolorizing, and filtering; and post-treatment: removing the solvent in the solution after adsorption and decoloration to obtain a solid, pulping, separating the solid, and carrying out vacuum drying treatment to obtain a target product. According to the refining method adopted by the invention, 2, 5-furandicarboxylic acid with high purity and excellent color can be obtained, the used organic solvent and composite adsorbent can be reused after being treated, the process is simple, and the cost is relatively low.

This invention discloses a method for the zero-carbon resource utilization of phosphogypsum and desulfurized gypsum to prepare acids, bases, and highly active calcium, relating to the field of phosphogypsum and desulfurized gypsum recycling technology. The process involves thoroughly washing phosphogypsum and desulfurized gypsum, reacting them with sodium carbonate, followed by flotation, solid-liquid separation, multi-stage membrane filtration, chelating resin adsorption, and bipolar membrane electrodialysis to produce sulfuric acid, sodium hydroxide, and circulating purified water. The floated material undergoes solid-liquid separation, drying, calcination, and fluidized bed reaction to produce calcium hydroxide, while simultaneously enriching and separating heavy metals. The fluidized bed waste heat is used for cascaded power generation, and the tail gas from the electromagnetic rotary kiln is treated with sodium hydroxide absorbent to generate sodium carbonate, achieving full element recovery, zero new waste emissions, and zero carbon emissions in the production process. The process is highly efficient and energy-saving, producing high-purity products suitable for industrial applications.

The invention relates to the field of isopropyl alcohol preparation, and discloses a chelate resin and a preparation method thereof, and a method for preparing electronic grade isopropyl alcohol, the method comprises the following steps: styrene-divinylbenzene polymeric microspheres are contacted with N-hydroxymethyl phthalimide, and an imidization reaction, a hydrolysis reaction and a carboxylation reaction are sequentially carried out. By using the chelate resin and the method for preparing the electronic-grade isopropanol, the content of isopropanol in the product can be effectively increased, and the content of water, zwitterions and particles can be reduced.

The application discloses a method for purifying nickel-containing wastewater based on ion exchange resin, and the method comprises the following steps: (a) pretreating the nickel-containing wastewater; (b) adsorbing by using a cation resin column; (c) deeply purifying by using a chelating resin column; and (d) sequentially performing air-water pulse backflushing, acid regeneration, gradient transformation and two-stage electrolysis recovery. The pretreatment of the nickel-containing wastewater provides favorable conditions for subsequent resin adsorption; the two-resin synergistic adsorption mode removes nickel ions in the wastewater; the air-water pulse backflushing step effectively prevents resin blockage and improves the use efficiency of the resin; the acid regeneration step realizes efficient regeneration of the resin; the gradient transformation step further optimizes the adsorption performance of the resin; and the two-stage electrolysis recovery step not only realizes effective recovery of nickel resources, but also improves the electrolysis efficiency, so that the purification method has significant technical advantages and application prospect.

Belonging to the technical field of high purity chemical preparation, the invention provides an electronic grade caustic soda purification production process, which comprises the following steps: S1, preheating a solar photovoltaic NaOH solution to 55 + / -2 DEG C, and then carrying out precision filtration through a titanium sintered felt dynamic cross-flow filter; s2, regulating the temperature of the filtered NaOH solution to 45 + / -2 DEG C, and sequentially carrying out adsorption purification through a strong acid resin column and phosphoramidate chelate resin; s3, heating the purified NaOH solution to 45 + / -1 DEG C, removing residual particles through a polytetrafluoroethylene folded filter element filter, preheating to 60 + / -1 DEG C, and concentrating in a falling film vacuum concentrator; and S4, quickly cooling the concentrated solution to 35 DEG C through a titanium corrugated pipe cooler, and then filling nitrogen for sealed storage. According to the process, the solar photovoltaic NaOH solution can be purified into the electronic-grade caustic soda through the working procedures of dynamic cross-flow filtration, resin enhanced adsorption, precise filtration, vacuum concentration and the like, the concentration reaches 47.0 + / -0.5%, and the ultra-pure reagent requirements of the electronic industry such as semiconductors and display panels are met.

The invention belongs to the technical field of chelating resin, and relates to salt-tolerant chelating resin suitable for high-salinity wastewater and a preparation method thereof. The salt-tolerant chelating resin suitable for the high-salinity wastewater is prepared from chloromethylated spherical porous polystyrene resin, a functional monomer and iminodisuccinic acid through a reaction; the functional monomers are glycidyl methacrylate and vinyl phosphoric acid. The salt-tolerant chelating resin provided by the invention solves the problem that the adsorption effect of calcium and magnesium ions is poor when the traditional chelating resin is under a high-salt condition.

The invention relates to the technical field of electroplating waste liquid treatment, in particular to a resourceful treatment method for electroplating waste liquid. The trace metal impurities in the waste liquid are adsorbed in situ by the phosphonic acid chelating resin in a strong acid system and are converted into the heterogeneous catalyst, and the continuous / pulse combined feeding strategy of potassium hydrogen peroxymonosulfate is matched, so that deep mineralization of stubborn organic matters and accurate separation of impurities such as iron and nickel are realized; and high-purity copper sulfate pentahydrate crystals are prepared through copper type resin buffering and a specific crystallization process on the premise of not introducing exogenous impurities. The method is free of secondary pollution, realizes high-valued total recovery of ultra-pure resources in the electroplating waste liquid, has remarkable economic and environmental benefits, and is suitable for resource treatment of the PCB and semiconductor electroplating waste liquid.

The invention relates to the technical field of wastewater treatment, and discloses a recycling device for electroplating wastewater treatment, which comprises a tank body, and a two-way device A and a two-way device B mounted in the tank body, the two-way device A and the two-way device B are communicated with each other to allow wastewater to pass through, and a rotatable cylindrical part A is arranged at the center of the top of the two-way device A through a shaft core; and a rotatable cylinder piece B is arranged at the center of the bottom of the two-way device B through a shaft core. The two-stage adsorption design of strong acid cation exchange resin and chelate resin is adopted, interference ions such as calcium, magnesium and sodium ions are adsorbed through the A cylindrical part, the interference ions are prevented from seizing adsorption sites of the chelate resin, the selective adsorption capacity of the chelate resin on heavy metal ions such as copper, nickel and chromium is greatly improved, the purity of recycled heavy metal is higher, and the adsorption efficiency is improved. The basic requirement of resource reutilization can be directly met.

The application discloses a method for improving the stability of bamboo green liquor, and belongs to the technical field of liquor brewing. The method for improving the stability of bamboo green liquor comprises adsorption treatment, i.e. using chelating resin to adsorb the bamboo green liquor. According to the method for improving the stability of bamboo green liquor provided in the application, the bamboo green liquor with complex components can still maintain good color and luster after being stored for a certain period of time, and has high color and luster stability.