30 results about "Ionized sodium" patented technology

An oxide material characterized by that it has a perovskite structure comprising an oxide represented by ABO3, (Bi2O2)2+ (Am−1BmO3m+1)2− wherein A represents one kind or two or more kinds of ions selected from the group consisting of Li+, Na+, K+, Pb2+, Ca2+, Sr2+, Ba2+, Bi3+, Y3+, Mn3+ and La3+, B represents one kind or two or more kinds of ions selected from the group consisting of Ru3+, Fe3+, Ti4+, Zr4+, Cu4+, Nb5+, Ta5+, V5+, W6+ and Mo6+, and m represents a natural number of 1 or more, LnBa2Cu3O7, Z2Ba2Can−1CunO2n+4 or ZBa2Can−1CunO2n+3, wherein Ln represents one kind or two or more kinds of ions selected from the group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, Z represents one kind or two or more kinds of ions selected from the group consisting of Bi, Tl and Hg, and n represents a natural number of from 1 to 5; and a catalytic substance containing one or more kinds of elements selected from the group consisting of Si, Ge and Sn.

The invention provides an MOFs compound film which comprises a porous support film and UiO-66 series films growing on the porous support film through an anti-diffusion process. The invention also provides a preparation method and application thereof. According to the invention, a metallic salt solution and a ligand solution are utilized to reversely diffuse and grow uniform ultrathin pure UiO-66 series films on a base film under a relative mild condition, and meanwhile, acid is added on the side of the ligand solution so as to promote the formation of a metallic zirconium cluster, the metallic salt solution and the ligand solution are separated by an intermediate base film, the crystal in a main body solution can be reduced, a reactant is recovered and the MOFs and the base film are relatively firmly combined with each other and cannot fall off easily. Besides, the inherent cellular structure of the pure phase MOFs film can separate the ions such as lithium ions / magnesium ions and sodium ions / magnesium ions under the effect of aperture sieving, can promote the separation selectivity of monovalent and divalent ions and can supply a precedent condition for ion separation.

The invention discloses a preparation method of a nano-sheet Sb / C composite material for lithium ion / sodium ion battery anode and belongs to the technical field of a lithium ion / sodium ion battery anode material. The technical scheme is mainly characterized in that dissolving antimony salts and ligands into a solvent for reaction to obtain a sheet-shape precipitate as an intermediate; and carrying out resorcinol-formaldehyde carbon coating on the intermediate, and then, carrying out sintering to obtain the nano-sheet Sb / C composite material for the lithium ion / sodium ion battery anode. The synthesis method has the advantages of simple equipment, simple operation and special structure of the prepared products and the like; and the prepared nano-sheet Sb / C composite material can greatly improve energy density and rate capability of the lithium ion / sodium ion battery.

The invention discloses sulfonated polyarylether based on a triphenylphosphine oxide structure unit and a preparation method thereof in the technical field of chemical industry. Sulfonated triphenylphosphine monomer, triphenylphosphine monomer and dihydroxyl monomer are used as raw materials to be polycondensed directly in polar solvent by the action of reaction accelerant to obtain a polymer with a structural formula as above, wherein, M is hydrogen ion, lithium ion, sodium ion, kalium ion, cesium ion or ammonium ion; when m is equal to 1, the polymer is a homopolymer containing sulfonated triphenylphosphine oxide; when m is more than 0 and less than 1, the polymer is the multipolymer containing the sulfonated triphenylphosphine oxide. The polymer has good thermal stability, mechanical property and solubility, large molecular weight and good compatibility with inorganic material and can be applied in proton exchange membrane fuel cell field.

The invention relates to selenium-enriched water. Every liter of purified water contains the following ions in milligram by content : selenium ions which are less than or equal to 0.01 in milligram by content, strontium ions which are less than or equal to 0.08 in milligram by content, zinc ions which are less than or equal to 0.064 in milligram by content, iron ions which are less than or equal to 0.5 in milligram by content, sodium ions which are less than or equal to 110 in milligram by content, potassium ions which are less than or equal to 0.2 in milligram by content, molybdenum ions which are less than or equal to 0.01 in milligram by content, and metasilicic acid which is less than or equal to 13.62 in milligram by content. The invention further relates to a preparation method of the selenium-enriched water. The preparation method comprises the steps of taking water, performing aeration, performing coarse filtration, performing fine filtration, performing sampling detection and performing sterile filling. The selenium-enriched water disclosed by the invention has the advantages that the selenium-enriched water contains rare mineral elements, so that people can select drinking water according to physical conditions, and the effect of increasing and replenishing trace elements can be achieved; the selenium-enriched water is underground mineral water which is gushed out of deep underground with selenium and without pollution, or manually pumped, and is free from pollution, so that the safety is high, and drinking the selenium-enriched water can prevent blood acidification caused by drinking surface water for a long term.

The invention relates to the technical field of initiators, specifically to preparation methods of cumyl peroxyneodecanoate (CNP) and solvent type CNP. The preparation method of the cumyl peroxyneodecanoate comprises synthesis and purification, wherein cumene hydroperoxide, an alkali liquid and neodecanoyl chloride are subjected to a reaction to obtain a water-in-oil emulsion, the water-in-oil emulsion is washed by adopting four treating agents, and standing and water separating are performed to obtain the cumyl peroxyneodecanoate. According to the invention, the problems that initiating activity reducing and unit consumption increase of a dispersing agent due to the remaining of cumene hydroperoxide in a solvent type cumyl peroxyneodecanoate initiator are effectively solved, and the contents of water-soluble ions such as chlorine ions, iron ions, sodium ions, potassium ions and the like are reduced; and by adding a synergist comprising a surfactant and an anti-freezing agent, the solvent type cumyl peroxyneodecanoate initiator with high transparency and high stability is directly prepared, so that the production period is effectively shortened, the labor intensity is reduced, thesafety coefficient is increased, and the loss of a target product is avoided.

The invention provides a technology for recovering bromine element from mother liquor extract of an oxidation process of a terephthalic acid production device, and belongs to the field of process recovery. The mother liquor extract of the oxidation process of the terephthalic acid production device mainly contains acetic acid according to the material content, and acetic acid is used as a solventto dissolve cobalt ions, manganese ions, bromide ions, BA, sodium ions, iron ions, 4-CBA, PT acid and the like with relatively low concentrations. The bromine element is extracted by using the technology to achieve recovery in a form of hydrobromic acid or sodium bromide, and the economic value of the bromine element is recovered; and the situation that in the prior art, bromine is discharged intosewage, the bromine element can cause adverse effects on biological florae of a sewage treatment unit, and the activity of the biological florae is affected is also avoided.

The invention provides a ZnS / SnS-coated NC hollow microsphere negative electrode material for a lithium ion / sodium ion battery negative electrode and a preparation method of the ZnS / SnS-coated NC hollow microsphere negative electrode material, and belongs to the technical field of lithium / sodium batteries. The method comprises the following steps that: spherical ZnSn(OH)6 is prepared; a simple hydrothermal method and an in-situ polymerization coating method are combined to prepare the ZnS / SnS-coated NC hollow microsphere composite material with the ZnSn(OH)6 is used as a precursor, and a pyrrole monomer used as a carbon source. The microstructure of the composite material is of a hollow core-shell structure; the surface of the composite material is covered with a smooth carbon layer; the hollow structure can adapt to volume expansion of ZnS / SnS in a lithium ion / sodium ion de-intercalation process; and the carbon layer on the surface of the composite material can improve the conductivity, prevent agglomeration of ZnS / SnS and guarantee the structural stability of the composite material. The lithium ion / sodium ion battery negative electrode prepared from the ZnS / SnS-coated NC hollow microsphere material shows relatively high specific capacity, excellent rate capability and cycle performance.

The invention discloses a purification method of lithium bis(oxalato)borate and the lithium bis(oxalato)borate, wherein the purification method comprises the steps: dissolving a lithium bis(oxalato)borate crude product in an organic solvent, and filtering to remove insoluble substances after the lithium bis(oxalato)borate crude product is completely dissolved; putting the filtered filtrate into areaction bottle, calculating the moisture content in the filtrate according to the moisture content in the lithium bis(oxalato)borate crude product and the dilution ratio after dissolution; then adding acyl chloride or thionyl chloride compounds in a certain proportion; after addition of the acyl chloride or thionyl chloride compound is finished, heating the mixture to any temperature between 35 DEG C and 70 DEG C; carrying out a heating reaction for any time between 3 hours and 9 hours; evaporating the reaction solution under reduced pressure to remove the solvent to obtain a semi-finished product, and recrystallizing the semi-finished product by using a mixed solvent to finally obtain the electronic-grade lithium bis(oxalate)borate of which the purity is more than 99.9 percent, the watercontent is less than 50 ppm, the acid value is less than 10 ppm, and the contents of potassium ions, sodium ions, calcium ions, magnesium ions and the like are all less than 10 ppm. The method has the beneficial effect of reducing water residue and impurity content.

The invention relates to an allergen remover composition containing component (a): an organic compound forming an azeotropic mixture with water and having an azeotropic point of lower than 100° C. with water at 1013.25 hPa, component (b): a component which upon evaporation of a liquid component in the allergen remover, forms a solid containing a compound represented by the following general formula (1) or component (b′): a combination of potassium ion, sodium ion and sulfate ion at a potassium ion / sodium ion molar ratio of from 2 / 8 to 9 / 1 and component (c): water.KxNay(SO4)2  (1)wherein x is a number of 0.8 to 3.6, y is a number of 0.4 to 3.2, and x+y is 4.

The invention discloses a nutrient salt balancing method for low-salinity circulating water used for penaeus vannamei culture. The nutrient salt balancing method is realized by adjusting the concentration of main ions. The main ion concentrations of the water body are: 0.2-0.4g / L of calcium ion, 0.6-1.5g / L of magnesium ion, 0.07-0.15g / L of potassium ion, 3-5g / L of sodium ion, 2-5g / L of chloride ion, 0.5-1g / L of sulfate ion, 0.02-0.04g / L of carbonate ion, 0.2-0.5g / L of bicarbonate ion, 0.02-0.04g / L of bromide ion and 0.05-0.1g / L of borate ion; and the ratio of the calcium ion to magnesium ion is 1: 3-5. The nutrient salt balancing method of the low-salinity circulating water is used for penaeus vannamei culture, the yield of the penaeus vannamei reaches 6-7kg / m3, the survival rate of the penaeus vannamei is high, the growth is fast, and the culture range of the penaeus vannamei is effectively widened, so that the method plays a greater role in promoting the development of the culture ofthe penaeus vannamei.

The invention discloses a method for using bipolar membrane electrodialysis for preparing beta-aminopropionic acid. The method comprises the steps of using 3-aminopropanenitrile and a sodium hydroxideaqueous solution or a potassium hydroxide aqueous solution as raw materials for reaction to obtain a sodium beta-aminopropionate solution, then making sodium beta-aminopropionate directly subjected to action of bipolar membrane electrodialysis equipment, forming sodium hydroxide by combining ionized sodium ions and hydroxyl, forming the beta-aminopropionic acid by combining aminopropionic acid radicals and hydrogen ions, and obtaining a high-purity product by conducting concentration and crystallization on the beta-aminopropionic acid. According to the production method, no hydrochloric acidor sulfuric acid is used for acidifying the sodium beta-aminopropionate, no wastewater is generated, no solvents need to be used in the crystallization process, solvent residues in the product are avoided, the purify can be over 99%, moreover, a generated sodium hydroxide solution can be recycled, thus an economic effect is good, moreover, the theoretical yield of the technology is 100%, and the actual yield can be over 90%.

The invention discloses application of triphosphoric acid mixed transition metal sodium salt in preparation of a lithium ion battery or a zinc ion battery. The chemical formula of the tripolyphosphate mixed transition metal sodium salt is Na <x> B <3-x> CyD <2-y> P3O11, wherein B is K, Li, Ca, Rb and Cs; x is more than 0 and less than or equal to 3; C and D are Mn, Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Al, Mg, Ru, Rh, Tc, In and Mo, and y is more than or equal to 0 and less than or equal to 2. The invention provides a method for synthesizing a high-performance multifunctional secondary battery electrode material, which is suitable for industrial production, by utilizing a sol-gel method. The triphosphoric acid mixed transition metal sodium salt can be used for the positive electrodes or negative electrodes of various rocking chair type batteries (zinc ion batteries, sodium ion batteries or lithium ion batteries), has multifunctionality, high performance, high working voltage and the like, and is beneficial to simplifying a production line and reducing the production cost.

The invention provides a preparation method of medical hydrogel. The preparation method comprises the following steps: providing an acidic aqueous solution of gelatin; adding a coupling agent into theacidic aqueous solution of gelatin to carry out a first crosslinking reaction to obtain a gelatin / coupling agent solution, wherein the coupling agent is a silane coupling agent containing amino and / or epoxy bonds; standing the gelatin / coupling agent solution at 1-4 DEG C to obtain a gelatin / silica hybrid hydrogel; and soaking the gelatin / silica hybrid hydrogel in a specific salt solution for 1-2days, and performing drying at room temperature for 2-3 days to obtain the gelatin / silica toughened hydrogel, wherein the specific salt solution is a salt solution formed by sulfate radicals, monohydrogen phosphate radicals, dithiosulfate anions, ammonium ions and sodium ions.

The invention belongs to the technical field of material preparation, and particularly relates to a graphdiyne composite filtering membrane as well as a preparation method and application thereof. According to the preparation method of the graphdiyne composite filtering membrane, the graphdiyne composite filtering membrane is obtained by carrying out coupling reaction on a polyyne compound and a porous material of which the surface contains copper in a solvent. The graphdiyne composite filter membrane obtained by the invention can selectively filter water molecules, potassium ions, sodium ions, magnesium ions, calcium ions, chloride ions and sulfate ions in seawater, that is, the water molecules are allowed to pass through but the potassium ions, the sodium ions, the magnesium ions, the calcium ions, the chloride ions and the sulfate ions are not allowed to pass through. The preparation method of the graphdiyne composite filtering membrane is simple to operate and low in energy consumption, and a hydrophobic graphdiyne layer can be directly grown on the surface of the porous material containing copper on the surface, so that seawater desalination is realized.

A fungicide for the treatment of skin aliments prepared by mixing three parts aquamarine salts having a chloride to sodium ratio of 1.4:1, two parts ionized sodium chloride and one part sodium bicarbonate by weight. The dry mixture is blended then dissolved in water in the amount of four table spoons of mixture to one liter of water as a soaking bath for affected area of skin and nails. The mixture can also be dissolved to form a vaginal bath by dissolving two tablespoons of mixture into 16 ounces of water. The mixture may be ground into a fine powder and added to equal amounts by weight of petroleum gel to form a salve that is applied to affected areas for prolonged application. Food color may be added to provide aesthetic qualities to the mixture and resulting bath and douche.

The invention belongs to the technical field of electrochemistry, in particular to an aqueous lithium ion / sodium ion battery based on an iodide ion solution positive electrode and an organic material negative electrode. Its specific composition includes: a liquid aqueous solution positive electrode containing iodide ions, lithium ions or sodium ions, organic compound monomers or An organic polymer anode, and a polymer ion exchange membrane separating the liquid cathode from the polymer anode. The invention uses an ion exchange membrane to separate positive and negative poles, adopts solution-phase active materials as positive electrode materials of water-based lithium-ion or sodium-ion batteries, and forms a water-based lithium-ion or sodium-ion battery system with organic negative electrodes that do not contain any metal elements. The aqueous battery assembled accordingly has the advantages of super long cycle life, high specific energy, high power, high safety, low cost and environmental friendliness.

The invention discloses a method for separating sodium and lithium from partially ionized brine containing sodium and lithium, comprising the following steps: S1: performing partial electrolysis on salt lake brine containing NaCl and LiCl systems to obtain LiCl and NaOH solution systems; Add H to the NaOH solution 2 SO 4 , to get LiCl and Na 2 SO 4 Solution system; S3: LiCl and Na 2 SO 4 The solution is evaporated to make Na 2 SO 4 In a saturated state, the solution to be frozen is obtained; S4: adding a freezing auxiliary agent to the solution to be frozen; S5: subjecting the liquid to be frozen with the freezing auxiliary agent to freeze crystallization, and centrifuging to obtain LiCl lithium liquid and Na 2 SO 4 •10H 2 O crystals. The present application converts the chloride system in the original solution into a sulfate radical system, fully utilizes the freezing and crystallization technology of sodium sulfate, realizes the high-efficiency separation of lithium and sodium, and overcomes the system transformation obstacles in the field.

The present invention relates to the technical field of initiators, in particular to a preparation method of cumyl peroxyneodecanoate and solvent-based CNP, the preparation method comprising synthesis and purification procedures, utilizing cumene hydroperoxide, lye and Neodecanoyl chloride is reacted to obtain a water-in-oil emulsion, and then four kinds of treatment agents are used to wash the water-in-oil emulsion, stand still, and separate water to obtain the product. The present invention effectively solves the problem of decreased initiation activity and increased unit consumption of dispersant caused by residual cumene hydroperoxide in the solvent-type cumene peroxyneodecanoate initiator, and reduces the concentration of chloride ions, iron ions, sodium ions, potassium ions and other water-soluble ions, while adding a synergist composed of surfactants and antifreeze agents to directly prepare a solvent-based cumyl peroxyneodecanoate initiator with high transparency and high stability, which is effective It greatly shortens the production cycle, reduces labor intensity, increases the safety factor and avoids the loss of the target product.

The invention belongs to the technical field of chlorine separation, and particularly relates to a method for dechlorinating flue gas desulfurization circulating liquid by an ammonia method. The method comprises steps: subjecting ammonia-process flue gas desulfurization circulating liquid to filter pressing separation by a plate-and-frame filter press, filtration by a sand filter, filtration by a nanofiltration membrane and alkalifying of nanofiltration liquid to completely convert ammonium ions into free ammonia, pumping the nanofiltration liquid into a tube pass of a hollow fiber gasification membrane, and enabling ammonia gas to reach the outer side through membrane holes and immediately being reacted with dilute sulfuric acid to generate ammonium sulfate; adding hydrochloric acid into the nanofiltration liquid after ammonia molecules are removed to adjust the pH value to be neutral, adding an oxidizing agent to oxidize residual ammonia into nitrogen, preparing saturated edible salt water by using the nanofiltration liquid after ammonia removal as salt dissolving water, filtering the saturated edible salt water by adopting a nanofiltration method, feeding the nanofiltration liquid into an ionic membrane electrolysis device to produce chlorine and liquid caustic soda, and freezing and cooling nanofiltration concentrated water, separating sodium sulfate out of water in the form of mirabilite, so that sulfate radicals are removed. According to the method, chloride ions in the circulating liquid can be effectively removed, and meanwhile resource utilization of the chloride ions, sulfate ions and sodium ions is achieved.

Essentially sodium-free effervescent solid pharmaceutical compositions The present invention relates to an effervescent solid pharmaceutical composition, which is essentially free of sodium content, comprising: a therapeutically effective amount of an active pharmaceutical ingredient; one or more pharmaceutically acceptable alkaline earth metal carbonates or hydrogencarbonates in an amount from 1 to 31% by weight of the composition; and one or more pharmaceutically acceptable acids, pharmaceutically acceptable acid salts, or alternatively, a mixture thereof, in an amount from 2 to 62% by weight of the composition; together with one or more pharmaceutically acceptable excipients or carriers; wherein, the total content of the ion sodium in the effervescent solid pharmaceutical composition is equal to or lower than 1 mmol. It also relates to processes for its preparation and its use in therapy.

The invention discloses an alkali-free fluorine-free chlorine-free liquid concrete accelerator and a preparation method thereof, and relates to the technical field of environment-friendly concrete accelerators. The raw materials comprise 45%-55% of aluminum sulfate, 1.5%-2.5% of a modification regulator, 3.5%-5% of diethanol amine, 2%-2.5% of magnesium sulfate, 1%-3% of calcium formate, 1%-2% of urea, and the balance of water. The preparation method comprises the following steps: weighing the raw materials according to the ratio, adding water into a reaction kettle, stirring while heating, and gradually adding aluminum sulfate; after the temperature is controlled to be 55-65 DEG C, sequentially adding magnesium sulfate and calcium formate according to metering every 5-8 min, and carrying out continuous stirring reaction for 1.5-2 h; and naturally cooling to normal temperature, adding urea, the modified regulator and diethanol amine, stirring for 20-30 minutes, and controlling the pH value of the accelerator solution to be 2.5-3, thereby obtaining the finished liquid concrete accelerator. The finished product is transparent and uniform liquid, the density is 1.15 g / cm < 3 >1.2 g / cm < 3 >, and the alkali-aggregate reaction risk of the concrete can be greatly reduced; and all the raw materials do not contain chloride ions, fluorine ions and sodium ions, and erosion of the raw materials to the reinforced concrete is reduced.

The invention discloses a method for using bipolar membrane electrodialysis for preparing beta-aminopropionic acid. The method comprises the steps of using 3-aminopropanenitrile and a sodium hydroxideaqueous solution or a potassium hydroxide aqueous solution as raw materials for reaction to obtain a sodium beta-aminopropionate solution, then making sodium beta-aminopropionate directly subjected to action of bipolar membrane electrodialysis equipment, forming sodium hydroxide by combining ionized sodium ions and hydroxyl, forming the beta-aminopropionic acid by combining aminopropionic acid radicals and hydrogen ions, and obtaining a high-purity product by conducting concentration and crystallization on the beta-aminopropionic acid. According to the production method, no hydrochloric acidor sulfuric acid is used for acidifying the sodium beta-aminopropionate, no wastewater is generated, no solvents need to be used in the crystallization process, solvent residues in the product are avoided, the purify can be over 99%, moreover, a generated sodium hydroxide solution can be recycled, thus an economic effect is good, moreover, the theoretical yield of the technology is 100%, and the actual yield can be over 90%.

The invention provides a gypsum-based dry-mixed mortar material and a preparation method thereof. The gypsum-based dry-mixed mortar material comprises low-quality gypsum clinker, a base material containing calcium oxide, sulfur, aluminum oxide, silicon oxide and the like, zeolite and quick lime. The gypsum-based mortar with excellent performance is prepared by taking the low-quality gypsum with high impurity content as a main body material; meanwhile, solidification of impurity ions (chloride ions and sodium ions) is realized, resource utilization of the low-quality gypsum is realized, and the gypsum-based mortar provided by the invention has good workability, durability and construction performance and is suitable for industrial production; wherein the dry volume weight of the gypsum-based mortar is reduced while the setting time of the gypsum-based mortar is effectively adjusted, so that the coating rate of the mortar is increased, and the crack resistance of the mortar is improved.

The invention relates to a high-silicon ZSM-5 molecular sieve for adsorbing VOCs and its preparation method and application. The preparation method of the high-silicon ZSM-5 molecular sieve comprises the following steps: 1) Alkali source, template agent, aluminum source, pH buffer agent, silicon source and ZSM‑5 molecular sieve seed crystals were added to water and mixed uniformly to obtain a gel; 2) the gel in step 1) was placed in a hydrothermal kettle for high-temperature aging, and then hydrothermal crystallization was performed. After filtering, washing and drying, the high silicon ZSM‑5 molecular sieve is obtained. Compared with the prior art, the present invention can make silicon better enter the skeleton during the synthesis process, improve the utilization rate of silicon, and controllably adjust the silicon-aluminum ratio of the product through the feeding ratio, and the prepared high-silicon ZSM The content of cations (sodium ions, potassium ions or organic amine ions) in ‑5 molecular sieve is low, the ratio of silicon to aluminum is higher than 200, and the hydrophobicity is strong. It shows excellent performance in the adsorption and purification of VOCs waste gas with large air volume, low concentration and high humidity. .

A storage solution to maintain and perfuse organs awaiting transplantation comprising (a) an isotonic balanced solution comprising a physiologically acceptable amount of potassium, mono acidic phosphate, biacidic phosphate, chloride, sodium and bicarbonate ions; (b) 50-250 mM glucose; (c) 0.2-20 mM of an alkanoyl L-carnitine or a physiologically acceptable salt thereof; (d) 1-100 mM of L-carnitine or a physiologically acceptable salt thereof; (e) water is described. The storage solution can also include other components such as anti-oxidants and / or chelating agents.

The invention provides a ZnS / SnS@NC hollow microsphere negative electrode material for lithium-ion / sodium-ion battery negative electrodes and a preparation method thereof, belonging to the technical field of lithium / sodium batteries. The method of the present invention comprises the following steps: preparing spherical ZnSn(OH) 6 ; With ZnSn(OH) 6 ZnS / SnS@NC hollow microsphere composites were prepared by combining simple hydrothermal method and in-situ polymerization coating method. The microscopic morphology of the composite material is a hollow core-shell structure, and the surface is covered with a smooth carbon layer. The hollow structure can adapt to the volume expansion of ZnS / SnS in the process of deintercalating lithium ions / sodium ions. It can improve the conductivity, prevent the agglomeration of ZnS / SnS, and ensure the stability of its structure. Li-ion / Na-ion battery anodes made of ZnS / SnS@NC hollow microsphere materials exhibit high specific capacity, excellent rate performance and cycle performance.

The invention provides a process for recovering bromine element from the mother liquor extraction liquid in the oxidation process of a terephthalic acid production device, which belongs to the field of process recovery. The mother liquor extraction liquid of the oxidation process of the terephthalic acid production unit mainly contains acetic acid according to the material content, that is, acetic acid is used as a solvent to dissolve relatively low concentrations of cobalt ions, manganese ions, bromide ions, BA, sodium ions, iron ions, 4‑ CBA, PT acid, etc., apply the present invention to extract the bromine element therein to obtain the form recovery of hydrobromic acid or sodium bromide, reclaim the economic value of the bromine element; also avoid the bromine discharge of this part in the prior art and enter the sewage , bromine will have adverse effects on the biological flora of the sewage treatment unit and affect the activity of the biological flora.

The invention provides a digestion method for metal organic framework materials. The method includes the following steps: 1) dissolving the salt in deionized water to prepare a salt solution with a certain concentration; 2) adding a zirconium-based MOF material to the solution in step 1); 3) stirring at a certain temperature or ultrasonicating for a certain period of time to obtain the zirconium The clear aqueous solution after the digestion of the base MOF material; the anion of the salt is any one of carbonate, bicarbonate and citrate, and the cation of the salt is lithium ion, ammonium ion, sodium ion and potassium ion Any one, in which the anion and cation can be freely combined and matched. When the anion is carbonate, the cation cannot be lithium ion. The MOF digestion method provided by the invention has mild reaction conditions and fast digestion speed; it has universal applicability to zirconium-based MOF.