20 results about "Sodium polysulfide" patented technology

The invention relates to the field of silane coupling agents, and discloses a preparation method of a sulfur-containing silane coupling agent, which comprises the following steps: step 1, mixing alkali metal sulfide with sulfur, stirring, and reacting to obtain a sodium polysulfide solution; step 2, adding a pH regulator, a hydrolysis inhibitor and a phase transfer catalyst into the sodium polysulfide solution, dropwise adding 3-halogen propyl trialkoxysilane, and stirring for condensation reaction to obtain a crude product reaction solution; 3, the crude product reaction liquid is sequentially subjected to distillation, decolorization with a decolorizing agent and filtration, and the sulfur-containing silane coupling agent is prepared after the steps are completed. The crystal water contained in the raw materials is used as a reaction medium, so that additional addition of an organic solvent and pre-drying and dehydration treatment are not needed, the spontaneous combustion risk of sodium sulfide is avoided, raw material pretreatment and solvent recovery procedures are omitted, and the whole technological process is simplified, so that the operation is simple and convenient, and the cost is low. The method is suitable for large-scale industrial production.

The invention discloses a (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The preparation method comprises the following steps: uniformly mixing and stirring cyclohexanol, acetylacetone and absolute ethyl alcohol, adding tungsten hexachloride, uniformly stirring at room temperature, then adding ferric trichloride, uniformly stirring at room temperature, carrying out hydrothermal reaction, washing and drying to obtain the (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material. A mixed system of cyclohexanol, acetylacetone and absolute ethyl alcohol is utilized to synergistically solve the problems of advanced hydrolysis and agglomeration of metal ions; the oxygen vacancy of the W18O49 accelerates the conversion of the sodium polysulfide, and the Fe (OH) 2 derivative strengthens the chemical anchoring of the sodium polysulfide, thereby realizing the synergy of the anchoring and rapid conversion of the NaPSs. When being used as a sodium-sulfur battery positive electrode material catalyst, the catalyst shows excellent catalytic performance and rate capability, and still has the capacity of 420 mAh g <-1 > after circulating for 25000 circles under the large current density of 10 A g <-1 >. The strong adsorption characteristic of the hydroxylated iron-based component and the high catalytic activity of W18O49 are utilized to form a synergistic effect, and a new scheme is provided for breaking through the technical bottleneck of an RT Na-S battery.

The invention relates to the technical field of preparation of organic silicon functional materials, and particularly discloses an integrated preparation method of bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, which comprises the following steps: by taking a chloropropyl triethoxy silane-chloromethyl phenethyl triethoxy silane mixture as a raw material, carrying out one-step reaction on the raw material to obtain bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, and carrying out one-step reaction on the bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane; in the whole process, a reaction system and process parameters are reserved and designed around the function of chloromethyl phenethyl triethoxy silane, and the overall production efficiency is improved by shortening the time consumption of a sodium sulfide synthesis procedure; the target mixed silane is prepared through four core processes of sodium sulfide synthesis, sodium polysulfide in-situ preparation, selective vulcanization in a phosphate buffer system and product homogenization in sequence. According to the invention, a one-step integrated preparation method is innovatively adopted to replace a traditional compounding process, the total impurity content of the product is less than 0.6%, the equipment investment cost is reduced, and the overall production efficiency is improved.

This invention discloses a WS2 / WO2 composite material, its preparation method, and its application in sodium-sulfur batteries, belonging to the field of functional material preparation technology. The method includes: mixing cyclohexanol and oleic acid evenly to obtain a mixed solvent; adding tungsten hexachloride to the mixed solvent and stirring at room temperature until dissolved to obtain a precursor solution; subjecting the precursor solution to a hydrothermal reaction, washing, and drying to obtain W2 / WO2. 18 O 49 Powder; W 18 O 49 After the powder and sulfur source undergo a thermally controlled reaction under an inert atmosphere, a WS2 / WO2 composite material is obtained. This invention prepares a WS2 / WO2 composite material with a unique three-dimensional heterostructure through a simplified two-step method. By integrating the strong adsorption properties of WS2 and the high catalytic activity of WO2, and through interfacial coupling, the conversion of sodium polysulfides is synergistically accelerated. At the same time, its preparation process is significantly more complex than existing technologies, and can effectively suppress the shuttle effect, improve reaction kinetics, and enhance battery cycle stability.

The invention discloses a process method for producing sodium sulfide from solid waste after waste lithium battery treatment. The process method comprises the following steps: step 01, material preparation section; 02, a preheating section; step 03, a calcining section; step 04, a heating section; step 05, evaporation section; step 06, a product packaging section; and pumping the sodium sulfide concentrated solution into a tabletting machine in a tabletting and packaging section, cooling and solidifying the sodium sulfide concentrated solution into a solid, blanking, slicing and packaging into a sodium sulfide product. According to the invention, resource utilization of the graphite slag as the solid waste is realized, and the economic benefit of the waste lithium battery product is improved. In the whole sodium sulfide production process method, a raw material preheating method and an indirect heating external heating type calcining rotary furnace are adopted, so that substances such as oxygen in water vapor and flue gas are not in contact with a reaction mixture, and side chemical reactions causing generation of impurities such as sodium carbonate, sodium thiosulfate or sodium polysulfide are avoided as far as possible from the source; therefore, the yield of the product is improved, the impurity content in the product is low, and the purity of the product is improved.

The application provides a method and equipment for separating selenium and tellurium from high-tellurium crude selenium raw materials. The method can selectively form tellurium polysulfide from tellurium in the crude selenium by adding sulfur in an alkaline solution, so that the metallic tellurium is converted into ions and enters the solution, and the main metallic selenium remains in the slag, thereby preliminarily and effectively separating the selenium and the tellurium, achieving a separation coefficient of 90.67%, and reducing the content of tellurium in the crude selenium raw material from 0.30% to 0.028%. The application has the advantages of good selenium and tellurium separation effect, simple operation, short process, and strong raw material adaptability.

A hydrocarbon-based membrane material composition for a redox flow battery includes component A that is a polymer including an anionic group selected from a group consisting of a sulfonylimide moiety, a tetrahedral borate-based moiety, and a carboxylate-based moiety. The composition further includes component B that is a polymer including a sulfonate moiety. The content of component A is 60 to 100 wt. % based on the total weight of components A and B. The content of component B is 0 to 40 wt. % based on the total weight of components A and B. Components A and B may be block copolymers such as pentablock terpolymers. The sulfonylimide moiety may be (trifluoromethanesulfonyl)imide. A method of making a hydrocarbon-based membrane for a redox flow battery and a redox flow battery including the hydrocarbon-based membrane are also provided. The redox flow battery may be a non-aqueous Na—S flow battery.

The invention provides a preparation method and application of a multi-sulfur polymer. The preparation method comprises the following steps: mixing a dichloro intermediate and a sodium polysulfide aqueous solution, and carrying out condensation polymerization in a formed mixed system to prepare a polysulfide polymer; an organic solvent exists in the mixed system, and the organic solvent is selected from C6-C9 aromatic hydrocarbons. According to the preparation method disclosed by the invention, salt after condensation polymerization can be quickly and efficiently separated, so that the quality of liquid polysulfide rubber obtained during cracking of the polysulfide polymer is improved, and the production efficiency of a production device is greatly improved.

This invention relates to a sodium polysulfide-based cyanide-free zinc-inhibiting composite inhibitor for lead-zinc separation, comprising, by weight: 1-2 parts sodium polysulfide, 3-5 parts zinc sulfate, 1-4 parts sodium metabisulfite, and 0.1-1.5 parts organic selectivity modifier; the sodium polysulfide is Na₂S. x The formula is: x = integers from 2 to 4; the organic selective regulator is one of L-cysteine, tannin, and modified corn starch; sodium polysulfide is the core zinc-inhibiting component; zinc sulfate and sodium polysulfide work synergistically to enhance the inhibition effect on sphalerite; and the organic selective regulator further strengthens the selectivity of "inhibiting zinc but not lead," reducing lead mineral loss. This invention's composite inhibition does not require operation under strongly alkaline conditions; only neutral slurry is needed to achieve efficient inhibition, significantly reducing the amount of lime used and avoiding the problem of excessively high alkalinity in the return water. This reduces the neutralization cost of return water treatment and fundamentally solves the problem of scaling and clogging in return water and slurry pipelines.

This invention utilizes microwave-assisted rapid preparation of Ni-ZIF-8 derived carbon materials. Using this material as the main component, sulfur is loaded as the active material to prepare the cathode material, which is then assembled into an RT Na-S battery. The process is simple, structurally stable, and exhibits excellent electrochemical performance, possessing certain practical application value. By introducing metallic nickel to modify the basic structure of ZIF-8, the derivative acquires certain catalytic capabilities, and the precursor Ni-ZIF-8 is prepared using a simple synthetic reaction. Then, by introducing a microwave absorber, rapid carbonization is achieved under microwave irradiation to obtain the Ni-ZIF-8 derived carbon material. The drastic temperature change causes the bulk structure of the precursor to break down during carbonization, preserving the high specific surface area and abundant active sites of traditional ZIFs while enhancing the material's conductivity. Relying on the high specific surface area, abundant active sites, and excellent conductivity of the Ni-ZIF-8 derived carbon material, the synergistic effect of "physical adsorption-chemical adsorption-catalytic conversion" effectively suppresses sodium polysulfide shuttle, reduces internal battery polarization, and exhibits excellent electrochemical performance.

The application provides a fluorine-doped phosphorus-carbon composite negative electrode material, which is composed of elemental phosphorus and a fluorine-doped porous carbon substrate, the fluorine-doped porous carbon substrate has gradually decreasing fluorocarbon content from the surface layer to the inside, and the X-ray photoelectron spectrogram (XPS spectrogram) of the F element has characteristic peaks of 687.2±0.1eV and 685.5±0.1eV. The composite material is composed of elemental phosphorus and a porous carbon substrate, the porous carbon is composed of carbon and fluorocarbon. By introducing fluorine atoms into the porous carbon, the structure of carbon and fluorocarbon is constructed, the carbon content of the surface layer to the inside of the porous carbon material gradually increases, and the fluorocarbon content gradually decreases. The introduction of fluorine successfully constructs a polar interface on the surface of the material, and in the battery cycle process, the polar interface effectively improves the polysulfide adsorption of the material to sodium, inhibits the dissolution of sodium polysulfide shuttle, and thus effectively improves the cycle performance of the composite material.

Method of flotation separation for copper-sulfur polymetallic ore includes: S1, an ore grinding treatment is carried out on a raw ore to obtain a ground ore material with the exposure ratio of 112, 204, 312 facets of chalcopyrite of 55%-65%, 5%-18%, and 3%-10% respectively, and the exposure ratio of 100 facet of pyrite of 60%-80%; S2, the ground ore material, the collector A, the depressant B and the frother are mixed and undergo one-time roughing, so as to obtain the rougher concentrate and the rougher tailings; S3, the rougher concentrate and the collector A are mixed and undergo multiple-time cleaning to obtain the copper concentrate; and S4, the cascade-intensified flotation is carried out on the rougher tailings to obtain a sulfur-containing tailings, wherein the collector A includesand the depressant B includes sodium cyanamide, sodium dicyandiamide, sodium polycyanamide and sodium polysulfide.

The invention provides a preparation method of a biomass waste-based porous carbon material for a positive electrode of a room-temperature sodium-sulfur battery. The preparation method comprises the following steps: S1, carrying out pre-carbonization treatment on a waste biomass material pine nut shell at a high temperature; s2, putting the pre-carbonized material obtained in the step S1 into a ball milling tank for pulverization; s3, mixing the powder obtained in the step S2 with cobalt potassium cyanide and a KOH solution, stirring for a certain time, centrifuging, and drying; s4, putting the sample obtained in the step S3 into a tubular furnace for high-temperature sintering, and performing alkali washing, acid washing and water washing on the sintered sample until the sample is neutral to obtain a doped modified porous carbon material; and S5, loading sulfur into the porous carbon material obtained in the step S4 through a hot melting method to obtain the sulfur-carbon composite positive electrode material for the sodium-sulfur battery. The cobalt-doped biomass porous material obtained in the invention not only promotes the rapid conversion of polysulfide, but also effectively inhibits the shuttle effect and volume expansion effect of sodium polysulfide, and significantly improves the cycling stability and rate capability of a sodium-sulfur battery.

This invention discloses a lignin-derived carbon-coated NiS / TiO 2 Composite materials, their preparation methods, and applications. This invention uses sodium lignosulfonate as a carbon precursor and introduces TiO2, a substance with strong adsorption properties for sodium polysulfide. 2 NiS / TiO₂ with high specific capacity and good cycle stability was prepared by hydrothermal and calcination treatment. 2 / C composite material has a simple preparation process and low cost. As a high-energy-density and high-stability sodium-ion battery anode material, it is of great significance to the development of sodium-ion battery anode materials.

The application discloses modified mixed cat litter containing zeolite bentonite and a preparation method thereof, and belongs to the technical field of modified mixed cat litter preparation.The modified mixed cat litter containing zeolite bentonite is composed of the following components in parts by weight: 30-50 parts of modified cat litter, 10-20 parts of bentonite cat litter, and 0.1-0.3 parts of antibacterial agent, wherein the modified cat litter is prepared from corn straw, acrylic acid, zeolite, bean dregs, starch and polyacrylamide solution, and the antibacterial agent is prepared from ammonia water, methyl acrylate, sodium polysulfide, isopropylamine and sulfuryl chloride.The modified mixed cat litter prepared by the method has excellent water absorption rate, ammonia removal effect and antibacterial property.

This invention discloses a method for controllably preparing sodium polysulfide heterostructures anchored to hard carbon through grafting synergy. The method includes the following steps: S1, dissolving sucrose and performing a hydrothermal reaction to obtain hydrothermal carbon microspheres; S2, mixing the hydrothermal carbon microspheres and sodium thiosulfate (Na2S2O3) and ball milling them at high energy followed by high-temperature treatment to obtain covalently coupled Na2S... x / HC heterostructure. This invention also discloses a Na2S obtained by the above preparation method. x / HC heterostructure and its application in sodium-ion battery anode. The Na2S provided by this invention... x / HC heterostructure, as the negative electrode of sodium-ion batteries, features high sodium storage capacity, high initial efficiency, and ultra-high rate sodium storage.

This application belongs to the field of battery technology, specifically disclosing a battery cell, a method for preparing the battery cell, a battery device, and an electrical device. The battery cell provided in this application includes a positive electrode sheet, which includes a positive electrode active material. The positive electrode active material includes a sulfur-carbon composite material, which includes a porous carbon material and a sulfur-containing active material supported on the porous carbon material. The sulfur-containing active material includes any one or more of elemental sulfur, sodium sulfide, or sodium polysulfide. The porous carbon material has micropores and mesopores, which are interconnected to form a tortuous pore structure. The negative electrode sheet includes a sodium metal sheet. The battery cell provided in this application improves battery capacity by reducing the loss of positive electrode active material during battery cycling.

The invention discloses antibacterial and antioxidant peach gum polysaccharide as well as a preparation method and application thereof, and belongs to the technical field of natural high polymer materials, the preparation method comprises the following steps: under the condition of an initiator, peach gum polysaccharide and glycidyl methacrylate are subjected to graft polymerization reaction in water, and epoxidized peach gum polysaccharide is prepared; and dissolving the epoxidized peach gum polysaccharide and sodium polysulfide in water, carrying out gradient temperature reaction, and then sequentially carrying out dialysis and drying to prepare the antibacterial and antioxidant peach gum polysaccharide. The prepared antibacterial and antioxidant peach gum polysaccharide retains excellent hydrophilicity and biocompatibility of natural peach gum polysaccharide, sulfur chains are introduced through accurate molecular structure modification, the antibacterial and antioxidant performance of the peach gum polysaccharide is remarkably improved, the peach gum polysaccharide has wide application prospects in the fields of food, cosmetics, biological medicine and the like, and the antibacterial and antioxidant peach gum polysaccharide can be widely applied to the fields of food, cosmetics, biological medicine and the like. Development and utilization of natural peach gum resources are promoted, and the application range of peach gum polysaccharide is expanded; in addition, the method adopts a water phase system, is safe and environment-friendly, has no organic solvent residue risk, is mild in reaction condition and low in cost, and is easy for large-scale production.

The invention discloses a three-dimensional stacked nano-beam Pd-W18O49 material and a preparation method and application thereof, and belongs to the technical field of functional materials.The method comprises the steps that cyclohexanol and acetone are evenly mixed, hexachloride is added, the mixture is evenly stirred, and W18O49 powder is obtained after hydrothermal reaction, washing and drying; and dissolving the W18O49 powder in a palladium acetate solution, carrying out a water bath reaction, washing again, and drying again to obtain the three-dimensional stacked nano-beam Pd-W18O49 material. The three-dimensional stacked nano-beam structure can provide a larger specific surface area and increase catalytic active sites; the ordered accumulation of the nano-beams is beneficial to the construction of a rapid electron transmission channel, and the electron conduction problem of the sulfur positive electrode is improved. Through the synergistic catalysis of rich oxygen vacancies and Pd and W18O49, the conversion reaction of sodium polysulfide is effectively accelerated, the shuttle effect is inhibited, and the charge-discharge efficiency, the cycle stability and the actual capacity of the battery are improved. A new breakthrough is brought to the performance improvement of the sodium-sulfur battery, and the practical application of the sodium-sulfur battery in the field of large-scale energy storage is promoted.

The invention relates to a carbon nano tube loaded transition metal atom composite material and a preparation method and application thereof, the composite material comprises a non-metallic element doped carbon nano tube and transition metal atoms loaded on the carbon nano tube, and the transition metal atoms form an AN4-B five-coordination structure on the carbon nano tube; wherein the transition metal is at least one of Fe, Co, Ni and Cu, the non-metallic element is at least one of N, O, F and S, A is the transition metal, and B is the non-metallic element; after being compounded with sulfur, the composite material is applied to a room-temperature sodium-sulfur battery as a positive electrode material, so that the conversion kinetics of sodium polysulfide is remarkably accelerated, and migration and agglomeration of iron monatomic in the cyclic process are effectively inhibited, thereby realizing high sulfur utilization rate, high rate capability and super-long cycle life. The invention provides an effective catalyst design strategy for solving the problems of shuttle effect and slow reaction kinetics of the room-temperature sodium-sulfur battery.