353 results about "Sulfidation" patented technology

This invention relates to the field of chemical equipment technology, and discloses a lithium sulfide preparation device and method, comprising: an insulated shell; a reactor rotatably disposed inside the insulated shell, with a heating chamber formed between the reactor and the insulated shell; a rotating shaft fixed to one end of the reactor, passing through one end of the insulated shell and rotatably engaging with a support assembly; a rotating assembly connected to the rotating shaft to drive its rotation; and a heat source inlet pipe fixed to one end face of the insulated shell to communicate with the interior of the heating chamber. This invention utilizes a dynamic reactor, causing the solid material to continuously tumble and shift during the reaction process, greatly increasing the contact area between the solid phase and the gaseous hydrogen sulfide, enhancing mass transfer efficiency, significantly improving product purity and reaction efficiency, shortening the production cycle, reducing equipment investment and energy consumption, and facilitating large-scale industrial production of high-purity lithium sulfide.

The application provides a hybrid vehicle engine lubricating oil composition and a preparation method thereof.The hybrid vehicle engine lubricating oil composition comprises the following components: (A) a benzotriazole derivative; (B) a composite antioxidant comprising an alkylated diphenylamine antioxidant and a sulfide phenolic antioxidant; (C) a polyisobutylene succinimide ashless dispersant; (D) a sulfonate and / or a sulfated alkyl phenate; (E) a zinc dialkyldithiophosphate; (F) a composite friction modifier comprising an oil-soluble organic molybdenum friction modifier and an ashless friction modifier; (G) a phosphite type extreme pressure antiwear agent; and (H) a major amount of a lubricating oil base oil; wherein the structure of the benzotriazole derivative is shown in formula (I): wherein the definitions of the groups are shown in the specification.The hybrid vehicle engine lubricating oil composition has excellent antioxidant performance, corrosion resistance and rust resistance, and good emulsion retention performance and wear resistance.

The present invention relates to lithium sulfide and a method for preparing same, and provides lithium sulfide comprising peak A at 2.2 ppm to 2.5 ppm, peak B at 1.2 ppm to 2.1 ppm, peak C at -0.7 ppm to -0.5 ppm , peak D at 2.9 ppm to 3.1 ppm, and peak E at -0.2 ppm to 1.15 ppm, wherein, with respect to the integral ratio of the peaks, 5 ≤ A / B and 1 ≤ B / C.

This invention belongs to the field of metallurgical solid waste resource utilization technology, specifically involving a method for recovering rare and precious metals from smelting acid sludge. It includes: (1) oxidative leaching of smelting acid sludge using a sulfuric acid-hydrogen peroxide leaching system to obtain a selenium-containing solution and gypsum slag; (2) reduction of the selenium-containing solution using a reducing agent to obtain crude selenium; (3) pre-sulfurization of the gypsum slag obtained in step (1), followed by solid-liquid separation to obtain sulfidated gypsum slag; and (4) enrichment of silver and other precious metals in the sulfidated gypsum slag obtained in step (3) using an agglomeration flotation method. The oxidative leaching process in this invention differs from the traditional sulfuric acid-nitric acid leaching system. It uses green and clean hydrogen peroxide as the oxidant, without introducing other interfering elements, avoiding the problem of re-dissolution during selenium reduction, thereby reducing the amount of reducing agent used. Furthermore, the leaching temperature is lower than that of the traditional oxidative leaching process, thus reducing energy consumption and cost.

This invention belongs to the field of mineral processing technology, specifically relating to a selective sulfidation roasting-flotation separation method for a smithsonite-calcite mixed ore. The method first involves crushing and grinding the smithsonite, calcite, and sulfiding agent, then mixing them in a certain proportion and subjecting them to sulfidation roasting, preferentially causing the smithsonite to undergo sulfidation. After cooling the roasted product in an inert atmosphere, flotation separation is performed using xanthate as a collector to obtain zinc concentrate. By controlling the atmospheric conditions during the sulfidation roasting process, the sulfidation reaction efficiency of the smithsonite can be improved, and the generation of sulfur oxide gases during roasting can be reduced. When using this method to process the smithsonite-calcite mixed ore, effective recovery of the smithsonite can be achieved, with a flotation recovery rate exceeding 88%. This invention features a simple process flow and easily controllable operating conditions, providing a new technical approach for the efficient utilization of smithsonite resources.

本发明涉及一种锂硫电极中硫化锂的品质分析方法，作为分析锂硫活性材料中残留锂化合物的方法，所述分析方法包括：准备包括正极活性材料的电极的步骤；对所述电极进行充放电，以获取关于随容量(Specific Capacity)变化的电压(Voltage)的第一数据的步骤；以及基于所述第一数据，通过对随所述电压(V)变化的电池容量(Q)对所述电压(V)的微分值(dQ / dV)进行积分，获取并分析根据计算出的面积值而得到的数据的步骤。

This invention belongs to the field of battery materials technology, specifically relating to a one-step continuous dehydration and sulfidation method for preparing lithium sulfide from lithium hydroxide monohydrate. This invention uses LiOH·H₂O as the lithium source for preparing lithium sulfide, significantly reducing costs. The dehydration and sulfidation steps are completed continuously and uninterruptedly within the same reaction vessel, using the same batch of materials, through program control. There are no intermediate material transfer, separation, or intermediate processing steps, avoiding exposure to air for moisture absorption, oxidation, and the introduction of impurities, thus ensuring high product purity.

A reactant generation system for a continuous production lithium sulfide fluidised bed reactor is disclosed which comprises a hydrogen generator in fluid communication with a natural gas source and a

This invention discloses a CuS nanostructure material, its preparation method, and its applications. The CuS nanostructure material uses Cu-MOF octahedrons as a precursor, which are hydrothermally sulfided to obtain an octahedral hierarchical structure assembled from CuS nanorods. The CuS nanorods have a size of 50-100 nm, and the edge length of the precursor Cu-MOF octahedrons is 0.8-1 μm. This invention utilizes a one-step hydrothermal method to prepare a CuS nanostructure material through Cu-MOF sulfidation, resulting in a zinc-ion battery anode material with high conversion efficiency and excellent electrochemical performance.

This invention belongs to the field of oilfield chemical technology and discloses a surface-modified ultrafine graphite-based drilling fluid extreme pressure lubricant and its preparation method. The extreme pressure lubricant comprises a base oil, a long-chain fatty acid ester oiliness agent, a liquid extreme pressure agent, a surface-modified solid extreme pressure agent, a rheology modifier, and an emulsifier. The surface-modified solid extreme pressure agent is prepared by using ultrafine graphite powder as a matrix, undergoing a first modification with sulfurized oleic acid polyethylene glycol ester, and a second modification with an oil-soluble dispersant. This invention utilizes the non-degradable nature of modified graphite at high temperatures, combined with a liquid extreme pressure agent, to form a high-strength composite reactive film at the high-temperature friction interface through a carbon-sulfur-boron synergistic effect. Under the triple synergistic lubrication mechanism of the oil film, the chemically reactive extreme pressure film, and the solid lubricating film, the technical problem of easy demulsification and lubrication failure of traditional lubricants in environments with 200℃ high temperature and 36% saturated salt water is effectively solved.

This invention relates to the field of electrocatalytic materials technology, specifically to a ternary metal Prussian blue analogue-based partial conversion sulfur phosphating electrocatalyst, its preparation method, and its application. A CoMoO4 nanorod array is grown on a nickel foam surface via a hydrothermal method, further generating an in-situ FeCoNi-PBA precursor to form a hollow, embedded cubic structure. Hydrothermal sulfidation yields hollow, porous NiCo2S4 nanorods; subsequent low-temperature gas-phase phosphating achieves partial conversion of NiCo2S4, generating a NiCoP shell in-situ on the surface, forming a core-shell heterogeneous interface with the core, resulting in a NiCoP / NiCo2S4 / NF electrocatalyst. Compared to traditional bifunctional electrocatalyst preparation methods, this invention utilizes a two-step "sulfidation followed by phosphating" method to construct a stable heterogeneous interface in-situ on a conductive substrate, enabling the resulting catalyst to exhibit both good hydrogen evolution and oxygen evolution activity and long-term stability under high current in alkaline water electrolysis.

The application discloses a kind of high oxidation rate lead-zinc oxide ore aerated sulphidation flotation and tailings discharge process, belong to mineral processing technical field.The method includes the following steps: grinding to lead-zinc oxide ore raw ore, obtain slurry;Sodium sulfide is added to slurry, and under the condition of aerated stirring, sulphidation reaction is carried out, and sulphidation slurry is obtained;Collector and foaming agent are added to sulphidation slurry, and flotation is carried out, and lead concentrate and zinc concentrate are obtained.The application introduces forced aerated stirring in the sulphidation process, strengthens the mass transfer process among gas-liquid-solid three phases, promotes the generation of dense, stable lead sulfide film on the surface of lead oxide minerals, solves the problem of low sulphidation efficiency of traditional sulphidation process.The application is used to treat refractory lead-zinc oxide ore containing Pb 5.59%, Zn 44.02%, oxidation rate more than 90%, and closed-circuit test can obtain qualified lead concentrate with lead grade of 60.72% and lead recovery rate of 79.53%, while lead flotation tailings directly become zinc concentrate with zinc grade of 46.33% and zinc recovery rate of 98.41%, realizing efficient separation of lead and zinc and tailings discharge.

This disclosure provides a method for preparing sulfidated alkylphenol salt products to achieve a high sulfidation ratio of sulfidated alkylphenol salt to unsulfidated alkylphenol salt / phenol in the context of neutralization and optional over-alkaliening additives. The sulfidated alkylphenol salt products are obtained by sulfidating alkylphenols with a sulfur chloride blend comprising about 40% to about 75% by weight of sulfur dichloride.

The utility model discloses a kind of arsenic sulfide slag recovery arsenic with processing device, including reduction tank, liquid inlet and outlet are respectively arranged in the two sides of reduction tank, top is communicated with liquid inlet pipe and feed pipe, and storage tank and the storage tank of bottom with liquid inlet pipe intercommunication are supported in upper portion;The bottom of storage tank is communicated with the blanking pipe of electromagnetic valve, weighing device and the weighing tank of top end and blanking pipe bottom end contact are equipped below blanking pipe;Weighing tank one side top end is equipped with material receiving port, and the other side is equipped with automatic adjusting mechanism;The bottom plate of weighing tank is movable plate, upper end is equipped with material level meter, and driving part that movable plate is opened and closed is connected outside weighing tank;Storage tank top is equipped with feed inlet and water inlet pipe with flowmeter, arsenic analysis detector is equipped in reduction tank top with probe located in reduction tank, lifting mechanism that driving weighing device lifts and conveying mechanism that conveying weighing tank to feed inlet pipe, feed inlet upper portion;Overall degree of automation is high, labor intensity is low, reduction agent is put with high precision and low in cost.

This invention proposes a method for preparing and applying an indium sulfide photocatalytic material with specific vacancies. The method involves forming a first solution with ethanol and deionized water; dissolving InCl3·4H2O and thioacetamide, or InCl3·4H2O, thioacetamide, and hexamethylenetetramine, in the first solution by stirring; obtaining a clear solution; reacting the clear solution at a constant temperature; cooling after the reaction; and collecting the product by centrifugation; washing the product; and drying it at a constant temperature; finally, obtaining the photocatalytic material with specific vacancies. This invention introduces vacancies into In2S3, thereby regulating the surface active sites, enhancing its light utilization efficiency and the separation and transfer ability of photogenerated carriers, and improving the photocatalytic activity of N2 to NH3 reduction.

A rubber composition comprising a rubber and diresorcinol sulfide.

The application discloses a composite foaming agent for copper sulfide ore flotation and a preparation method thereof. The composite foaming agent is composed of the following components in mass fractions: high-carbon-chain polyhydric alcohol 20-35 parts, polyoxyethylene ether 15-25 parts, ester 105 10-20 parts, and isopropyl alcohol or sec-butyl alcohol 15-35 parts. The preparation method comprises the following steps: adding the high-carbon-chain polyhydric alcohol and the polyoxyethylene ether into a reaction kettle, stirring and mixing at 60-70 DEG C; slowly adding the ester 105, continuously stirring for 30-60 minutes, and keeping the reaction temperature at 70 DEG C; after cooling to room temperature, adding the isopropyl alcohol or sec-butyl alcohol, uniformly stirring, and filtering to obtain the composite foaming agent. The composite foaming agent has strong dispersibility, low viscosity, controllable foam performance, can act on gangue minerals such as talc and phlogopite, form a flexible adsorption layer, and improve the hydration of the gangue surface. The foaming agent realizes high-selectivity flotation effect, significantly improves the grade and recovery rate of copper concentrate, and has a significant effect on difficult-to-select fine-grained copper ore.

This invention provides an anode material, its preparation method, and its application. The anode material includes a silicon-carbon material and a modified coating layer covering the surface of the silicon-carbon material. The silicon-carbon material includes a core and a carbon layer covering the surface of the core. The core includes porous carbon and silicon deposited in the pores of the porous carbon. The modified coating layer, in the direction away from the silicon-carbon material, sequentially includes a first coating layer and a second coating layer. The first coating layer is made of tin and tin sulfide, and the second coating layer is made of a tin-modified sulfide solid electrolyte. Tin compensates for irreversible capacity loss and improves first-time efficiency. Tin and tin sulfide have high ionic conductivity, and the "point-to-surface" conductive network formed by tin and the carbon layer can significantly reduce interfacial resistance. The plasticity of the tin-modified sulfide solid electrolyte itself can optimize the interfacial contact between the anode and the electrolyte, reduce interfacial impedance, and buffer the volume expansion stress of the silicon material during charging and discharging. The synergistic effect of the above structures can effectively suppress the volume expansion of the silicon material.

This invention discloses a nitrogen-free atmospheric pressure superconducting heater, which relates to the field of heaters. The heater includes a heater body, within which an oil-water coil, an oxygen preheating pipe, a natural gas preheating pipe, and a combustion chamber are arranged. A superconducting heat pipe is installed at the top of the combustion chamber. A pure oxygen generator is installed at one end of the oxygen preheating pipe, and a natural gas source is installed at one end of the natural gas preheating pipe. An oxygen-enriched burner is installed on the side of the heater body. This nitrogen-free atmospheric pressure superconducting heater integrates environmental protection, energy saving, and safety. It solves the problems of inaccurate nitrogen control and inability to ensure long-term stable NOx compliance in existing heaters with low-NOx burners; it also solves the problem of existing heaters using conventional low-NOx burners generating large amounts of sulfurized condensate that corrodes the chimney; and it addresses the issues of existing heaters operating under closed pressure, being pressure vessels requiring mandatory annual inspections of the equipment and safety accessories, posing high-pressure risks and complex maintenance requirements.

This invention relates to a method for preparing carbon-modified vanadium sulfide lithium-ion battery anode materials using vanadium-containing oxalate. The steps are as follows: vanadium-containing oxalate and ammonia are mixed, heated and stirred, filtered, and the filtrate is collected; hydrochloric acid is added while heating and stirring until the pH reaches 7-9, filtered, and the filtrate is collected; hydrogen peroxide and ammonium sulfate are added sequentially while heating and stirring, kept at a certain temperature for a period of time, filtered, and solid ammonium metavanadate is collected and dried; the dried ammonium metavanadate, ammonia, and deionized water are mixed, thioacetamide and acetylene black are added sequentially, ultrasonically treated, heated and kept at a certain temperature, naturally cooled, and the solid obtained by filtration is washed and dried to obtain acetylene black composite vanadium tetrasulfide, which is the carbon-modified vanadium sulfide lithium-ion battery anode material. The carbon-modified vanadium sulfide lithium-ion battery anode material prepared by the method of this invention exhibits superior electrochemical energy storage effect and cycle stability, demonstrating excellent rate performance.

The application discloses a sulfidation-bimetallic oxide coupling adsorption treatment and resource recycling process for smelting acidic waste liquid, and specifically comprises the following steps: mixing the acidic waste liquid with calcium carbonate slurry to perform a primary neutralization reaction, performing solid-liquid separation after pH adjustment to obtain gypsum residue and neutralization pretreatment liquid; introducing H2S gas into the neutralization pretreatment liquid to perform a sulfidation reaction, returning heavy metal sulfidation residue obtained after filtration to a non-ferrous smelting system to recycle valuable metal resources; adding an aluminum-based bimetallic oxide adsorbent into the clarified sulfidation clear liquid after filtration to remove fluorine ions in the waste liquid; filtering to obtain fluorine-removed purified liquid, adding carbide slag slurry, and performing secondary neutralization with the aid of aeration, returning neutralization slag slurry to the primary neutralization to output gypsum residue which can be comprehensively utilized; and returning secondary neutralization clear liquid to a smelting water system for recycling. The application innovatively introduces the aluminum-based bimetallic oxide coupling sulfidation process to realize deep adsorption and removal of fluorine ions in smelting waste liquid, and forms a full closed-loop system of "resource recycling-harmless treatment-cyclic recycling".

The application relates to the technical field of metallurgical process control, in particular to a method for predicting the viscosity of smelting slag of oxidized-copper sulfide concentrate and application thereof. Based on the mass of specific raw material components in the slag of the to-be-detected oxidized-copper sulfide concentrate after oxygen-enriched top-blown smelting, the reference viscosity value of the slag is calculated by combining the pre-set smelting temperature, the pre-factor and the viscous activation energy; then the volume fraction of Fe3O4 obtained after oxidation is calculated according to the mass of the specific raw material components of iron; the predicted viscosity value of the slag is calculated by substituting the volume fraction of Fe3O4 and the reference viscosity value into an expression, which provides a basis for subsequent regulation and control of the smelting process based on the predicted viscosity value; and the problem of how to predict the viscosity of the slag of the oxidized-copper sulfide concentrate to optimize the smelting process is solved.

The application discloses a preparation method and application of a vulcanized polyacrylonitrile electrode material. The core steps are as follows: 1. a mixed solution of acrylonitrile, an ultraviolet light initiator and a solvent is prepared, and polyacrylonitrile is prepared by polymerization under the initiation of 250-420 nm ultraviolet light; 2. the polyacrylonitrile is uniformly mixed with elemental sulfur, and is vulcanized in an inert atmosphere at 300-450 DEG C, and then post-processing is performed to remove unreacted sulfur, thereby obtaining vulcanized polyacrylonitrile; and 3. the vulcanized polyacrylonitrile is mixed with a conductive agent and a binder to form a positive electrode slurry, and is coated on a carbon-coated aluminum foil to obtain a positive electrode. The polyacrylonitrile prepared by photopolymerization has a uniform morphology, and after vulcanization, a stable sulfur fixation structure is formed, the polysulfide shuttle is inhibited, and the sulfur loading is improved. When the material is used for a lithium battery, the specific capacity is more than 650 mAh / g, and the material has excellent rate and cycle stability. The method is simple, efficient and highly reproducible, is suitable for large-scale production of a lithium-sulfur / sodium-sulfur battery positive electrode, and solves the problems of fast capacity attenuation and poor rate of a traditional battery.

The invention relates to a composite comprising at least one reinforcing element having a surface comprising a copper-zinc alloy, said reinforcing element being embedded in an elastomeric composition based on at least one diene elastomer, a reinforcing filler, a sulfur-based crosslinking system comprising a metal oxide, stearic acid or one of its derivatives and a vulcanization accelerator, and a phenol-aldehyde resin based on: - at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functions in meta positions relative to each other, the two ortho positions of at least one of the hydroxyl functions being unsubstituted, and - at least one dialdehyde compound comprising two aldehyde functions, in which the phenol-aldehyde resin content ranges from 0.5 to 2 parts per million, and the mass ratio of metal oxide to stearic acid or one of its derivatives is greater than or equal to 8.

The method for producing lithium sulfide of the present application includes a mixing step of preparing mixed powder containing solid lithium hydroxide, solid sulfur, and a reducing agent containing carbon element; and a calcining step of calcining the mixed powder at a temperature of 600°C or higher and 1200°C or lower in a non-reactive gas or reducing gas atmosphere. In the calcining step, a gas accumulation inhibiting treatment is performed which inhibits accumulation of gas generated in the calcining step into the mixed powder. The gas accumulation inhibiting treatment is preferably performed at a temperature of 120°C or higher and 1200°C or lower.

The application belongs to the technical field of lithium-sulfur battery manufacturing, and particularly relates to a preparation device and a preparation method of high-purity ultrafine lithium sulfide electrolyte. The preparation device of high-purity ultrafine lithium sulfide electrolyte comprises a reaction furnace, a lithium microflow mechanism and a sulfur gasification mechanism are throughly arranged on the reaction furnace, and an ultrasonic generator is further arranged on the reaction furnace, and a tray is slidably arranged in the reaction furnace. The lithium microflow mechanism comprises a glove box and a smelting furnace which are throughly connected, a first mechanical valve is arranged at the communication part of the glove box and the smelting furnace, and a feeding pipe is further throughly arranged between the glove box and the smelting furnace. The smelting furnace is throughly connected with the reaction furnace through a microflow pipeline, and a microflow meter is arranged on the microflow pipeline. The sulfur gasification mechanism comprises a sulfur raw material bin and a tubular furnace which are throughly connected through a raw material pipeline, and the tubular furnace is throughly connected with the reaction furnace through an airflow pipeline. The application can continuously prepare lithium-sulfur electrolyte with high purity and low particle size without interruption, has the advantages of low cost and no other sulfide production, and is suitable for industrial production.