609 results about "Chelating resin" patented technology

The invention relates to a deep purification process for thallium-containing waste water, which belongs to the technical field of sewage treatment. The deep purification process for the thallium-containing waste water comprises the following steps: (1) adding excess oxidizing agent into the thallium-containing waste water so as to oxidize Tl<+> into Tl<3+>; (2) adjusting the pH value of the thallium-containing waste water to 7 to 13 so as to produce thallium hydroxide precipitate; (3) carrying out solid-liquid separation to remove the thallium hydroxide precipitate in the thallium-containing waste water so as to obtain preliminarily purified water; (4) adding a reducing agent into the preliminarily purified water so as to allow redox potential of the preliminarily purified water to be less than 200 mV; and (5) introducing the preliminarily purified water treated in the step (4) into an ion exchange column equipped with an adsorption resin for purification so as to obtain deeply purified water, wherein the adsorption resin is a macroporous chelate resin containing a mercapto group. The deep purification process enables the thallium-containing waste water to be deeply purified; and the obtained deeply-purified water has total thallium content of less than 0.1 [mu]g/L.

The invention discloses an acrylic-acid high-capacity primary-amino chelate resin for trapping copper ions and a preparation method thereof, belonging to the field of polyamine resin wastewater treatment. The structural unit of the primary-amino chelate resin disclosed by the invention is disclosed in the specification, wherein x represents a repetitive structure unit of different aminolysis reagents. The preparation method disclosed by the invention has the advantages of wide material sources, low cost, simple operation steps and controllable synthesis conditions; and the synthesized resin has superhigh adsorption capacity for copper ions.

The 8-hydroxy quinoline type chelated resin has 8-hydroxy quinoline fixed onto macroporous silica gel through silanizing reagent and paraformaldehyde as spacer arm and bonding amount of 120-542 umol/g. Its synthesis process includes the steps of: pre-treating macroporous silica gel; introducing spacer arm; fixing ligand and acid washing to set via drying intermediate product II, washing with alcohol and drying for several times, washing with hydrochloric acid, and washing with deionized water to neutral so as to obtain yellow chelated resin. The resin has simple synthesis process, mild reaction condition, short synthesis time, easy control, high synthesis efficiency, low cost, high rigidity and high metal ion complexing capacity, and may be used in on-line enriching analysis of trace metal, enriching recovery of noble metals, purifying industrial waste water, etc.

The invention relates to a method for preparing heavy metal chelating resin, in particular to a method for preparing silica gel supported dithiocarbamate heavy metal chelating resin and adsorption of heavy metals such as lead, cadmium, copper, mercury and the like by the resin. The method comprises the following steps of: reacting carbon disulfide with a polyamine compound to generate a dithiocarbamate compound; and grafting the dithiocarbamate compound onto the surface of silicon dioxide, wherein a halogen group is modified on the surface of the silicon dioxide. By the method, the adsorption capacity of dithiocarbamate chelating resin is effectively improved; and the problem that silica gel is dissolved due to too high alkalinity of a reaction system (pH value is more than 11), or the dithiocarbamate compound cannot be generated through reaction due to too low alkalinity (the pH value is less than 10) when a dithiocarbamate functional group is prepared by reacting the silica gel with the carbon disulfide in the conventional synthetic route is solved, wherein an amino group is modified on the surface of the silica gel.

The invention discloses a method for simultaneous removal and recovery of heavy metal ions and organic acid by using s chelating resin, belonging to the field of resource treatment of heavy metal and organic acid composite wastewater. The invention comprises the following steps: (1) regulating the pH value of composite wastewater containing heavy metal ions and organic acid, pumping the wastewater into an adsorption columns packed with chelating resin, wherein metal removal rate is greater than 56%, the removal rate of organic acid is more than 58%, and the chelating resin is chelating resin containing primary amine groups; (2) conducting desorption on the chelating resin from the step (1) by a conventional inorganic acid desorption agent, and recovering a mixed solution of high concentration heavy metals and organic acid; stopping the desorption when no heavy metal or organic acid is detected in outlet water; and washing the resin after desorption to a neutral state for reuse. The invention is applicable to the simultaneous great reduction of concentrations of heavy metals and organic acid pollution and recovery of high concentration heavy metal ion and organic acid resources, so as to realize harmless treatment and resource recycling of the composite pollutants.

The invention discloses a method for producing battery-grade lithium hydroxide by utilizing battery-grade lithium carbonate lithium-depositing mother liquid. The method comprises the following steps:(1) accurately filtering the lithium-depositing mother liquid to remove undissolved substances; (2) adding sulfuric acid into the solution and removing carbonate radical through a stripping tower; (3)enabling the solution to flow through a chelate resin system to remove calcium and magnesium; (4) adding NaOH into the solution and transforming Li2SO4 into LiOH; (5) performing evaporation and concentration on the solution until the crystal slurry is 10 to 40 percent and performing centrifugal separation to obtain LiOH concentrated liquid; (6) cooling the LiOH concentrated liquid to 10 to 5 DEGC and separating out sodium to obtain LiOH purified liquid; (7) performing evaporation and concentration on the LiOH purified liquid and performing centrifugal separation to obtain a LiOH crystal; (8)recrystallizing the LiOH crystal to obtain the battery-grade lithium hydroxide. By the method, the battery-grade lithium hydroxide can be produced by circularly recovering the lithium-depositing mother liquid, the recovery rate of the lithium is increased and the production cost is reduced.

An environment-friendly high-density solid-free weighting agent comprises components in parts by weight as follows: 0.02-0.05 parts of a dispersant, 0.3-1 part of a tackifier, 0.5-1.2 parts of chelating agent, 0.6-2 parts of a corrosion inhibitor and the balance of soluble weighting materials, wherein the dispersant is one or two of sodium polyacrylate and copolymer of phosphono and carboxylic acid; the tackifier is one or more of chitosan, agar, polyacrylamide, xanthan gum and hydroxypropyl methyl cellulose; the chelating agent is one or two of aminophosphonic acid chelate resin and ethylenediamine tetraacetic acid disodium; the corrosion inhibitor is one or two of multiple polycarboxylate and sodium gluconate; the soluble weighting materials are one or more of potassium formate, potassium citrate, potassium acetate, potassium silicate and potassium sulfate. The process steps are as follows: the raw materials are taken in weight proportion, mixed and uniformly stirred; the raw materials are added to water and dissolved at the high temperature of 70-80 DEG C; a product is evaporated to dryness, and solid is obtained; the obtained solid is ground into powder, and the solid weighting agent is obtained.

The invention discloses a preparation method of ion imprinted hydroxamic acid chelate resin. According to the invention, propenyl hydroxamic acid is subjected to coordination with imprinting metal ions such as manganese, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium, and the like; under the effects of a crosslinking agent and an initiating agent, a propenyl hydroxamic acid-metal ion chelate is polymerized; and the imprinting metal ion is eluted, such that the ion imprinted hydroxamic acid chelate resin is obtained. The method provided by the invention has the advantages of mild reaction condition and high reaction efficiency. The prepared resin has the advantages such as high absorption capacity, high absorption selectivity, and the like.

The invention discloses a chemical treatment method, and concretely relates to a purifying method of waste brine in a glyphosate production process. The method comprises the following steps: adjusting the total phosphorus content and TOC and total nitrogen L in the waste brine, adjusting the pH value of the waste brine to 6-10, and carrying out nanofiltration membrane separation to obtain a penetrating fluid; processing the penetrating fluid by adopting a catalytic oxidation technology to obtain a first stage salt solution, wherein the catalytic oxidation is one or a combination of more of a Fenton oxidation processes, a hydrogen peroxide active carbon oxidation process, a sodium hypochlorite active carbon oxidation process, an ozone active carbon oxidation process and a chlorine dioxide oxidation process; and adsorbing by adopting an adsorbent to obtain a second stage salt solution, wherein the adsorbent can be one or a combination of more of macro-porous adsorption resin, chelating resin, molecular sieve, silica gel and activated alumina. The method can effectively solve the problems of difficult treatment, difficult us of waste salt as a byproduct and the like, and has very high economic and social benefits.

The invention relates to a high molecular material, in particular to a preparation method for a novel three-dimensional ordered macroporous chelating resin. The technological process comprises the following steps: (1) preparation of a silica colloidal crystal template; (2) preparation of a three-dimensional ordered macroporous material (3DOM); (3) chloromethylation of the 3DOM; (4) controlled grafting of a hydrophilic chain segment by using the 3DOM; (5) esterification of phenylsulfonyl for a PHEMA grafted chain; and (6) accessing chelation groups on the PHEMA grafted chain. The prepared three-dimensional ordered macroporous material is a polymer material, the pores are uniform and ordered, and more than one chelation group is accessed on each chain segment, therefore, the adsorptive capacity of the three-dimensional ordered macroporous chelating resin is far higher than that of other types of resin, and the adsorptive capacity to Hg<2+> is up to 1.96 mmol/g.

The invention provides a tetrazole-containing polymer of intrinsic microporosity comprising (10) or more subunits, wherein one or more of the subunits comprise one or more tetrazolyl moieties. In one embodiment, a polymer of intrinsic microporosity (PIM-1) was modified using a “click chemistry” [2+3] cycloaddition reaction with sodium azide and zinc chloride to yield new PIMs containing tetrazole units. Polymers of the present invention are useful as high-performance materials for membrane-based gas separation, materials for ion exchange resins, materials for chelating resins, materials for superabsorbents, materials for ion conductive matrixes, materials for catalyst supports or materials for nanoparticle stabilizers.

The invention relates to a method for recovering the valuable metals in a waste nickel-cobalt-manganese-lithium ion battery by an ion exchange method, which comprises the following steps of disassembling, discharging and crushing the waste nickel-cobalt-manganese-lithium ion battery, leaching, replacing the leachate with nickel powder or cobalt powder to remove the copper, and hydrolyzing with a valuable metal alkali solution as a neutralizer to remove the iron and aluminum; regenerating the chelating resin with a lithium hydroxide solution, adsorbing the nickel, cobalt and manganese in the impurity-removed solution, and backwashing with sulfuric acid to obtain a nickel-cobalt-manganese mixed solution; and recovering the lithium in the liquid after resin adsorption in the form of lithium hydroxide. According to the method, the stripping and leaching of the waste nickel cobalt lithium manganate ion battery are completed in one step, the impurity elements are not introduced during the leachate impurity removal and valuable metal separation and extraction process, the lithium hydroxide used for ion exchange resin is regenerated via the lithium hydroxide, at the same time, the nickel-cobalt-manganese is absorbed, so that the lithium is prevented from being adsorbed and entering a nickel, cobalt and manganese solution to be lost, and the lithium recovery is prevented from being influenced due to the high sodium ion content in the solution with the sodium hydroxide. According to the present invention, the recovery rate of nickel, cobalt and manganese reaches 98% or above, the recovery rate of lithium reaches 90% or above, the technological process is short, the equipment is few, and the cost is low.

The invention relates to a high silicon-containing waste water in an oil field reuse boiler pretreatment technology and an apparatus. The pretreatment technology comprises the following steps: adjusting the high silicon-containing waste water in the oil field and adding a reverse demulsifier; depositing the adjusted waste water, separating oil and water and removing the impurity in the waste water; adding a salt substance in the waste water after deposition treatment and performing air floatation treatment, removing an dissolved organic matter and oil, filtering the waste water after the air floatation treatment and removing suspended matters; using filtering weak acid resin for preliminarily softening the filtered waste water, reducing the concentration of high valent cationic to ppm grade, using chelate resin for deeply softening the waste water after preliminary softening, and reducing the concentration of high valent cationic to ppb grade to obtain the high silicon-containing waste water after pretreatment in the oil field. The invention also provides the high silicon-containing waste water in oil field reuse boiler pretreatment apparatus.

The invention provides immobilized transaminase. The immobilized transaminase is obtained by fixing transaminase, with histidine tag, derived from Mycobacterium vanbaalenii PYR-1 onto an enzyme immobilization carrier; the enzyme immobilization carrier is obtained by derivatization of epoxy resin through IDA (imino diethyl acetic acid) and cobalt chloride or derivatization of ionic chelate resin through cobalt chloride. The immobilized transaminase has the advantages of firmness in combination, low enzyme activity loss, simplicity in separation and high reusability; low cost of an asymmetric conversion process, mild reaction conditions, environment friendliness, simplicity and convenience in operation, easiness in industrial expanding and promising industrial application prospect are realized.

The invention relates to a wet metallurgic method for effectively separating palladium from silver electrolyte by adopting modified polyacrylonitrile resin, and the process is free from pollution. The method adopts a technical scheme that: polyacrylonitrile resin is modified by adopting a hydroxyl amine hydrochloride solution to obtain a novel chelating resin namely amidoxime polyacrylonitrile resin; silver electrolyte which is roughly purified to remove heavy metal impurities is adsorbed by adopting the amidoxime polyacrylonitrile resin, so that palladium in the solution is loaded onto the resin, and the resin is subjected to primary desorption by adopting an acidic thiourea solution to obtain a palladium-containing desorption liquid; the resin is subjected to secondary desorption by adopting a high-concentration hydrochloric acid solution to obtain a silver-containing desorption liquid; and the resin which is subjected to twice desorption is regenerated by adopting a hydroxyl amine hydrochloride solution, and is returned to adsorb the palladium-containing silver electrolyte. According to the method, palladium and silver can be effectively separated, the adsorbed solution can be directly returned to silver electrolysis, the operation is simple, the purification time is short, the recovery rate of noble metals is high, and the practicality is strong.

The invention relates to mesoporous chelate resin containing phosphorus-oxygen functional groups and a method for separating and enriching uranium. A preparation method of the mesoporous chelate resin includes: adding 1-5g of organic crosslinking agent, 1-5g of unsaturated compound containing the phosphorus-oxygen functional groups and 0.02-0.08g of azodiisobutyronitrile into 1-10mL of organic solvent, stirring under 25 DEG C for 1-3 hours, adding the solution into a hydrothermal reaction kettle, reacting under 100 DEG C for 24 hours, taking out, opening the reaction kettle, performing rotation evaporation to remove the organic solvent, and performing vacuum drying under 45 DEG C for 12-24 hours to obtain the mesoporous chelate resin containing the phosphorus-oxygen functional groups, wherein mass number and volume number are proportionally adjusted. The preparation method is simple in synthesizing path and easy to operate. When the mesoporous chelate resin serving as an absorbent is used to separate and enrich the uranium under high acidity, the mesoporous chelate resin is high in absorption ability, large in absorption quantity, fast in absorption, and the like, and the mesoporous chelate resin can be easily separated from an aqueous solution and can effectively absorb and recycle the uranyl ions in the aqueous solution.

The invention discloses a novel silica gel-based PAMAM (polyamidoamine) hyperbranched macro-molecule chelating resin which is prepared by using aminated silica gel modified by a silane coupling agent as the core, directly adding an ABx type monomer (x>=2, and A and B are reactive groups) and carrying out one-step synthesis. The chelator prepared by the method can well adsorb heavy metal ions, can be repeatedly used, and has the advantages of simple synthesis process and low cost, thereby laying a foundation for large-scale production.

The invention discloses a method for producing reagent grade sodium sulfate by using a white carbon black mother solution. The method comprises the following steps of: 1) removing a little amount of solid residue such as white carbon black and the like in the white carbon black mother solution by using a mixed cellulose micropore filtration membrane with thickness phi of less than or equal to 0.15 micron, and preliminarily purifying the white carbon black mother solution into a sodium sulfate solution; 2) treating the sodium sulfate solution obtained in the step 1) by using chelating resin toobtain a 5 to 6 percent pure sodium sulfate solution; 3) performing electrodialytic concentration on the 5 to 6 percent pure sodium sulfate solution obtained in the step 2) to obtain a 15 to 25 percent pure sodium sulfate solution; and 4) performing multi-effect evaporation on the 15 to 25 percent pure sodium sulfate solution obtained in the step 3) to obtain crystal, separating the crystal by using a centrifuge, drying the separated crystal at the temperature of 120 DEG C, and thus obtaining a finished product. The sodium sulfate product prepared by the method has the characteristics of low impurity content, high quality, low moisture content and the like, and is a high reagent grade sodium sulfate product.

The invention discloses a method for extracting rubdium and cesium from acid brine. The method includes the steps that brine is pumped into an ammonium type chelate resin adsorption column, calcium ions and magnesium ions are adsorbed through the ammonium type chelate resin adsorption column, and effluent is brine without the calcium ions and the magnesium ions; the effluent is mixed with t-BAMBP or kerosene or sulfonated kerosene to be shaken, and a mixture stands still for layering and separation of a water phase and an organic phase; and reextraction is conducted on the organic phase, and the water phase containing rubidium chloride and cesium chloride is obtained. The method is simple in process, low in production cost, capable of achieving separate extraction for removing rubdium and cesium ions in radioactive water and free of secondary pollution.

In order to recover high-quality scandium from nickel oxide ores efficiently, this method comprises: a step (S1) for feeding Ni oxide ores and sulfuric acid into a pressure vessel, and subjecting the mixture to solid-liquid separation to form a leachate and a leach residue; a step (S2) for adding a neutralizing agent to the leachate, and thus forming a neutralization sediment and a post-neutralization fluid; a step (S3) for adding a sulfurizing agent to the post-neutralization fluid, and separating the obtained mixture into Ni sulfide and a post-sulfurization fluid; a step (S4) for bringing the post-sulfurization fluid into contact with a chelating resin, making Sc adsorbed on the chelating resin, and forming an Sc eluent; a step (S6) for bringing the Sc eluent into contact with an extracting agent, adding a back-extraction agent to the extract, and forming back-extracted matter; and a step (S8) for roasting the back-extracted matter, and forming Sc oxide.