105 results about "Amine solvent" patented technology

The invention relates to the technical field of petroleum processing, and particularly discloses a preparation method of a high-temperature corrosion inhibitor, which comprises the following steps: S1, uniformly mixing ferulic acid, diethylenetriamine, a solvent and a catalyst A in an inert atmosphere, heating to 150-200 DEG C, keeping the temperature for 4-6 hours, and cooling to obtain an imidazoline intermediate; s2, uniformly dispersing pyromellitic dianhydride in a solvent in an inert atmosphere, then adding the imidazoline intermediate and a catalyst B, uniformly mixing, heating to 180-220 DEG C, preserving heat for 6-8 hours, cooling, washing and drying to obtain the corrosion inhibitor, and the pyromellitic dianhydride is silanized pyromellitic dianhydride. The corrosion inhibitor prepared in the invention has good corrosion inhibition performance at high temperature.

The invention discloses a preparation method of a multi-element hydrotalcite-like derivative composite metal oxide and an application of the multi-element hydrotalcite-like derivative composite metal oxide in a process of catalyzing desorption of CO2 from an amine solution, and the method comprises the following steps: (1) mixing one or more soluble divalent and trivalent metal salts with an alkaline solution, and dissolving in water to obtain a mixed solution; (2) heating and stirring the mixed solution in an oil bath pan for a certain time, aging, cooling and filtering to obtain a precipitate; and (4) washing, drying, grinding and calcining the precipitate to obtain the multi-element hydrotalcite-like derivative composite metal oxide catalyst. The catalyst can be used for catalyzing the regeneration process of the carbon dioxide-rich amine solvent, the regeneration temperature can be reduced to 100 DEG C or below, and compared with the condition without using the catalyst, the carbon dioxide desorption rate and the total desorption amount can be effectively increased, and the regeneration energy consumption can be reduced.

The invention belongs to the field of fine chemical engineering, and discloses a method for synthesizing 2, 3-dimethyl-2-isopropyl butyronitrile, which comprises the following steps of: adding an organic amine solvent into a high-pressure reaction kettle, adding sodium amide, sodium iodide and a phase transfer catalyst into the reaction kettle under the protection of nitrogen and in a stirring state, stirring for a certain period of time, and reacting for 2-3 hours to obtain 2, 3-dimethyl-2-isopropyl butyronitrile. Dropwise adding a mixed solution of propionitrile and 2-bromopropane into the reactor, controlling the dropwise adding speed and the reaction temperature, continuously reacting for a period of time after the dropwise adding is finished to obtain a reactant solution, cooling the reactant solution, adding water, standing for layering, collecting an organic phase, distilling the organic phase at normal pressure to recover a solvent, and rectifying at reduced pressure to obtain 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3-pentanediol. According to the method, the sodium iodide, the phase transfer catalyst and the organic amine have a synergistic effect, so that the reaction time is shortened, and the yield of the product is improved.

The invention relates to the technical field of carbon dioxide capture, in particular to a method for preventing formation of nitramine in a carbon dioxide absorption process, which comprises the following steps: S1, selecting a proper amine solvent, and replacing traditional monoethanolamine (MEA) or diethanolamine (DEA) with an improved amine solvent, such as an amino acid salt solution or chain alkylamine; the performance of the solvent is optimized, and an amine solvent which is excellent in long-term stability, easy to regenerate and good in thermodynamic property is selected. By optimizing the operation temperature and pressure, the side reaction is inhibited to the maximum extent, each absorption tower section is finely controlled by adopting a sectional absorption process, and the nitramine generation risk is further reduced; through comprehensive application of a novel amine solvent and a nitramine inhibitor and a combined strategy for optimizing operation conditions, an efficient, stable and environment-friendly carbon dioxide absorption method is provided, the absorption capacity is improved, and the excellent solvent regeneration performance and by-product control capacity are further provided.

The invention discloses an organic amine-promoted phase separation solvent type carbon dioxide phase change absorbent and application thereof, and relates to the technical field of carbon dioxide capture and separation. The carbon dioxide phase change absorbent comprises a main absorbent, a phase-splitting accelerant and a solvent, the main absorbent is primary amine or secondary amine, the phase-splitting accelerant is tertiary amine or sterically hindered amine, the solvent is water, and a reaction product of the main absorbent and carbon dioxide is insoluble in the phase-splitting accelerant but soluble in the water. According to the organic amine-phase separation promoting solvent type carbon dioxide phase change absorbent, two kinds of organic amine are adopted as a main absorbent and a phase separation promoter respectively, the main absorbent has a main carbon dioxide loading function, and the phase separation promoter mainly plays a role in promoting liquid-liquid phase separation after the main absorbent absorbs carbon dioxide; the carbon dioxide absorption capacity is high, and meanwhile only a small amount of solution needs to be desorbed, so that sensible heat and latent heat of vaporization generated by water heating evaporation during desorption are reduced.

An aqueous solvent composition useful for CO2 capture is described, that includes one or more CO2-sorbing amines, e.g., an amino acid salt and a tertiary or a sterically hindered amine. The solvent composition may include one or more promoters that are effective to enhance solvent characteristics such as (i) CO2 sorption capacity, (ii) CO2 sorption rate, (iii) CO2 desorption capacity, (iv) CO2 desorption rate, and (v) regeneration temperature, in relation to a corresponding solvent lacking the promoters. In relation to existing CO2 capture solvent compositions, the disclosed aqueous solvent composition provides high solvent CO2 capacity, high rate of CO2 absorption and desorption, high thermal and oxidative stability, low solvent regeneration energy, low solvent emissions, and low solvent toxicity.

The invention discloses a system and a method for preparing a heterogeneous active solution suitable for a catalyst. The system comprises a raw material storage unit, a mother liquor storage unit, a corrosion-resistant reaction unit, a constant-temperature heating jacket, a solution filtering unit, a solution storage unit, an integrated online monitoring module, an exhaust system and the like. The system can realize automatic preparation and monitoring of an active solution; the method comprises the following steps: preparing a mother solution from oxalic acid, tartaric acid, citric acid, malic acid and other weak acids, complexing and dissolving the mother solution with a vanadium source, an active auxiliary agent and other substances, dynamically regulating the pH value to form a uniform active complex solution, and then using the solution to prepare the titanium dioxide supported vanadium-based SCR denitration catalyst. According to the method, an active complexing solution is prepared by adopting a one-step method, and the problems that a traditional organic amine solvent is high in toxicity, a prepared vanadium source is non-uniformly dispersed in a catalyst, active auxiliaries need to be prepared separately and the like are effectively solved. The denitration efficiency of the catalyst prepared by the method at the low temperature of 280 DEG C is improved by about 7-10%.

The application discloses a preparation method of a ferroferric oxide-sepiolite (Fe2O3-SEP) catalyst for CO2 amine solution desorption, wherein the catalyst is obtained by loading metal oxides on sepiolite through an impregnation method. The method comprises the following steps: firstly, magnetically stirring and impregnating a metal nitrate solution and sepiolite in a water bath, then performing suction filtration, drying, grinding and calcination to obtain the supported Fe2O3-SEP catalyst. The obtained catalyst is used for desorption of saturated amine-rich solution, the amine-lean solution after desorption is cooled, the CO2 loading amount of the amine-lean solution is titrated, CO2 is introduced again for absorption, and the amine-lean solution is recycled for 4-5 times. Compared with existing catalysts, the catalyst has the advantages of wide raw material distribution, low price, simple preparation process, no other by-products, stable catalytic performance and no influence on CO2 absorption performance of the amine solution.

The invention relates to the technical field of crude oil compounding, and discloses a crude oil structure determination method and device, and the method comprises the steps: screening out a target compound oil system from each compound oil system based on a first characteristic parameter of target crude oil and a second characteristic parameter of each compound oil system; according to the content of the acid gas and the content of the amine solvent in the target crude oil, establishing a chemical equilibrium model of the target compound oil system based on the reaction of the amine solvent and the acid gas; and solving the chemical equilibrium model until the target compound oil system reaches the target equilibrium state, and taking the structure corresponding to the target compound oil system in the target equilibrium state as the structure of the target crude oil. According to the scheme, the chemical equilibrium model of the compound oil system is established and solved based on the reaction of the amine solvent and the acid gas, and the target crude oil structure can be accurately simulated, so that the influence of the crude oil structure on crude oil behaviors can be accurately determined.

A composition for carbon dioxide (CO2) capture includes 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, meglumine, or combinations thereof. A process of CO2 capture includes mixing a CO2-containing gas with the composition. A system includes a component for receiving a gas and the composition, which absorbs CO2 from the gas. A further composition includes a first amine solvent selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, and meglumine and a second amine solvent independently selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, meglumine, ethyl diethanolamine, dimethylethanolamine, piperidine, 2-amino-2-methyl-1-propanol, and monoethanolamine. A further process includes reacting CO2 with an amine selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, and meglumine.

The invention discloses a low-partial-pressure CO2 catalytic absorption method and application, and belongs to the technical field of gas separation. The low-partial-pressure CO2 catalytic absorption method comprises the following steps: S1, providing a nitrogen-doped activated carbon catalyst; the nitrogen-doped activated carbon catalyst is prepared by taking activated carbon as a carbon source and modifying the activated carbon through a nitrogen-containing reagent; s2, providing an organic amine solvent; and S3, under the action of the nitrogen-doped activated carbon catalyst provided in the S1, enabling flue gas to react with the organic amine solvent provided in the S2. Compared with the existing CO2 absorption method, the method provided by the invention has the advantages that the CO2 absorption rate, the CO2 absorption capacity and the CO2 capture efficiency can be remarkably improved, so that low-cost CO2 capture is realized.

The present invention provides for a method for depolymerizing a mixture of plastics, said method comprising: (a) providing a composition comprising a synthetic plastic polymer; (b) introducing an amine solvent compound to the composition to form a polymer-amine solvent composition, and (c) incubating the polymer-amine solvent composition for a period of time to produce a depolymerized composition such that at least a portions of the synthetic plastic polymer is depolymerized into monomers.

The invention belongs to the technical field of carbon dioxide capture, and particularly relates to an energy-saving and environment-friendly organic amine solvent regeneration system and regeneration method. The energy-saving and environment-friendly organic amine solvent regeneration system comprises a regeneration tower, a boiler, a condensate water tank and a steam temperature and pressure reduction device which are sequentially and circularly connected, and also comprises a steam trap and a condensate water pump which can be further arranged. According to the invention, the heat of the steam condensate water as the desuperheating water part is recycled, so that the amount of externally supplied steam is reduced, and the regeneration energy consumption of the organic amine solution is reduced; the discharge amount of steam condensate water is reduced, the load on a condensate water system or a unit drainage tank of a thermal power plant is reduced, and visual pollution caused by the condensate water is reduced; in addition, the steam temperature and pressure reduction device does not need to externally supply deionized water, so that the consumption of the deionized water can be reduced; in addition, the technical scheme provided by the invention can be realized only by modifying an existing organic amine solution regeneration system and a steam supply system, and the generalization performance is better.

The utility model provides a system for removing cations in organic amine by a freezing technology, which comprises a crystallization cooler arranged on a skid, a liquid inlet of the crystallization cooler is communicated with an outlet of a temporary storage tank for filtered organic amine solvent to be treated, and a freezing unit communicated with the crystallization cooler is arranged on the outer side of the crystallization cooler. According to the utility model, sodium ions in the organic amine liquid can be crystallized before the organic amine liquid enters the collecting tank, so that the problem that positive ions such as the sodium ions in the organic amine liquid are crystallized at positions such as a system pipeline, a heat exchanger, a tower plate and the like to cause blockage and influence the normal operation of the system is solved; the working efficiency of the system pipeline, the heat exchanger and the tower plate is greatly improved, the maintenance and cleaning frequency is reduced, and the operation is more convenient and efficient.

The present application relates to a kind of sulfur-dissolving composition, sulfur-dissolving agent and its application, belong to oil and gas field chemical technical field.The sulfur-dissolving composition of the present application includes high branched polymer, amino modified nanomaterial, organic amine solvent and inorganic base catalyst;The molecular chain end of the high branched polymer has at least 3 or more amino groups;The inorganic base catalyst is water-soluble sulfide salt and / or water-soluble sulfhydryl salt.The sulfur-dissolving composition of the present application has strong sulfur-dissolving capacity, and amino modified nanomaterial has selective solubility to sulfur particles, and has higher compatibility with organic amine solvent.Amino modified nanomaterial has higher specific surface area, and is dispersed in organic amine solution, to provide abundant active sites for reaction with sulfur particles, reaction area increases, and the solubility of sulfur is improved;At the same time, the strong adsorption of amino modified nanomaterial reduces the mass transfer distance between sulfur molecules, and greatly improves the solubility of sulfur.

A surface treatment composition of the present invention is a surface treatment composition that are supplied as a vapor to a surface of a wafer having an uneven pattern on the surface and used to form a water-repellent protective film on the surface, the surface treatment composition containing a silylating agent and a solvent, in which the silylating agent contains a trialkylsilylamine, the solvent contains at least one or more selected from the group consisting of glycol ether acetate and glycol acetate, and a total content of the glycol ether acetate and the glycol acetate is 50% by mass or more in 100% by mass of a total amount of the solvent.

The invention relates to a low-energy-consumption flue gas carbon capture absorbent based on a composite amine solvent and application thereof. The absorbent comprises main amine, auxiliary amine, an accelerant, sulfolane, an antioxidant, a passivator, a stabilizer and water. The mass percent of water in the absorbent is 50%-70%. According to the invention, the absorbent with high water content is covered, the content of main amine in the absorbent is obviously reduced, and the corrosion to equipment is reduced. The antioxidant, the passivator and the stabilizer are added, so that the regeneration energy consumption can be reduced, the viscosity of the absorbent is reduced, and the application scene is expanded.

The invention discloses an electrolyte based on an amido multi-element deep eutectic solvent, a preparation method and a sodium metal battery, and the electrolyte is prepared by the following steps: mixing a sodium salt, an amide solvent and a hydrogen bond acceptor according to a certain molar ratio, uniformly stirring until a clear transparent liquid is obtained, and then adding a certain amount of an additive into the clear transparent liquid to obtain the multi-element deep eutectic electrolyte. The multi-element deep eutectic electrolyte is formed based on the Na-O coordination effect of an amide solvent and a sodium salt and the hydrogen bond interaction of a hydrogen bond donor and a hydrogen bond acceptor. Wherein strong Lewis acid-base interaction endows the amide solvent with strong coordination ability with sodium metal ions, so that the coordination of Na < + > and anions is reduced, and the dissociation of sodium salt is promoted; and secondly, a hydrogen bond acceptor is introduced, so that the viscosity of the eutectic electrolyte is reduced, the activity of alpha-H and N-H in an amide solvent can be effectively weakened, the compatibility of the electrolyte and a sodium metal interface is improved, and a stable solid electrolyte interface layer is constructed. The electrolyte has the advantages of high ionic conductivity, wide electrochemical window, high safety and the like.

The application provides a black phosphorus-carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: reacting black phosphorus and carbon material in an organic amine solvent at 80-200 DEG C to obtain the black phosphorus-carbon composite material. The black phosphorus-carbon composite material is prepared by using a solvothermal method. The reaction condition is mild, the operation is simple, the equipment is simple, and the scale-up is easy. When the black phosphorus-carbon composite material is used as a negative electrode material of a lithium ion battery, the black phosphorus-carbon composite material has good rate and cycle performance.

The invention belongs to the technical field of electronic chemicals in the integrated circuit industry, and particularly relates to a production process method of an electronic-grade cleaning agent. Comprising the following steps: S1, filtering an alcohol amine solvent through a filter element for later use; the method comprises the following steps: S1, adding part of ultrapure water into a storage tank, adding part of alcohol amine solvent, and adding part of solid additive into the storage tank, so as to form a cycle; the whole batch is fed in three periods, and stirring is started in the feeding process. The dissolvability of the solid raw material is improved by utilizing the dissolution heat release of the organic solvent dissolved in the aqueous solution. And step 2, further, after all the raw materials are added, starting circulation overnight. And step 3 and step 4, further, filtering after complete circulation, and sampling and detecting. The invention provides a production process of an electronic-grade cleaning agent in the integrated circuit industry, which can effectively shorten the production period, improve the granularity index quality of a system and prolong the service life of a filter element.

The invention provides a long-acting photoresist stripping liquid and application thereof. The long-acting photoresist stripping liquid comprises the following raw materials in percentage by mass: 30-60% of an ether solvent, 10-30% of an amine solvent, 10-30% of a ketone solvent, 1-5% of an amide solvent and an alcohol amine solvent as effective components, and a trace corrosion inhibitor. Through the synergistic effect of the components, the long-acting photoresist stripping liquid disclosed by the invention has a good removal effect on photoresist residues on a wafer, is effective for a long time, basically does not corrode metal aluminum, copper and the like on a substrate, and has a good application prospect in the fields of semiconductors and LEDs (Light Emitting Diodes).

The invention discloses a low-energy-consumption coal-fired flue gas trapping and systematic method based on a composite amine solvent, and relates to the technical field of coal-fired flue gas treatment. The method comprises the following steps: carrying out dust removal and cooling pretreatment on coal-fired flue gas, and introducing the coal-fired flue gas into a two-stage absorption tower from bottom to top; in the tower, the flue gas is sprayed by a lean amine solution before the first absorption section, and the lean amine solution contains methyldiethanolamine, piperazine and the balance of water; spraying by a semi-lean amine solution in the second absorption section; purified flue gas is discharged from the tower top, and the amine-rich solution is discharged from the tower bottom, heated by a heat exchanger and then enters a regeneration tower; the regeneration tower performs steam stripping regeneration by taking low-pressure steam generated by the triple-effect evaporation system as a heat source; after regeneration, the lean amine solution is cooled and returned to the first spraying layer, and the semi-lean amine solution is cooled and returned to the second spraying layer; carbon dioxide generated by regeneration is compressed and stored after being cooled and dehydrated. The method is mainly used for efficiently capturing carbon dioxide and remarkably reducing regeneration energy consumption in scenes such as coal-fired power plants.

The invention discloses a programmed elution separation method under a vincristine multi-component system, which comprises the following steps: dissolving a vincristine crude product by using trichloromethane, injecting into a medium-low pressure column filled with silica gel, carrying out programmed elution by using trichloromethane, methanol, water and an amine solvent, collecting an eluent containing vincristine, and concentrating to obtain the vincristine multi-component system. And decompressing and concentrating to obtain the vincristine with the purity higher than 98.0%. According to the present invention, the automation degree of the programmed elution is high, the repeatability is good, the high-purity vincristine can be obtained at the specific elution ratio, and the industrial production is easily achieved.

The application provides a liquid-liquid phase separation carbon dioxide absorption and desorption system, which comprises an absorption tower, a desorption tower, a heat exchange device, a plurality of liquid-liquid separation pools, a plurality of two-phase mixing pools, a rich phase mixing pool and a lean liquid mixing pool. The absorption tower has a plurality of stages and is connected in series. The plurality of liquid-liquid separation pools and the plurality of two-phase mixing pools gradually decrease the flow of absorption liquid, the CO2 load and the viscosity. The CO2 rich phase of the rich phase mixing pool is subjected to heat-induced stratification and cold rich liquid shunting and then enters the desorption tower for regeneration. The CO2 lean liquid of the lean liquid mixing pool returns to the absorption tower for recycling. The absorption liquid is a lean water-based mixed amine solvent containing active ingredients, phase separation promoters, anti-viscosity additives and a small amount of water. The liquid-liquid phase separation carbon dioxide absorption and desorption system has low solvent viscosity after loading CO2, high absorption rate and capacity, concentrated CO2 rich phase, high desorption pressure, low liquid holdup of each unit, low energy consumption, small equipment size and reduced overall carbon capture cost.

The invention discloses a low-partial-pressure CO2 catalytic absorption method, and belongs to the technical field of gas separation. The low-partial-pressure CO2 catalytic absorption method comprises the following steps: impregnating a rare earth metal oxide La2O3 or CeO2 on a porous alumina carrier to prepare a solid base catalyst, and catalyzing an organic amine solvent to absorb low-partial-pressure CO2 through the solid base catalyst, compared with an existing CO2 absorption method, the low-partial-pressure CO2 catalytic absorption method has the advantages that the CO2 absorption performance of the low-partial-pressure CO2 catalytic absorption method is superior to that of a single organic amine absorbent, the CO2 absorption performance and the absorption rate can be improved, the use amount of the absorbent is reduced, the size of an absorption tower and the equipment cost are reduced, and positive contribution is made to industrialization of a carbon emission reduction technology.

This invention relates to the field of electrochemical technology and discloses a low-temperature fluorine-containing rechargeable magnesium battery electrolyte, comprising a magnesium salt, a main solvent, and a composite additive. The composite additive is a mixed solution of an amine solvent and a fluorinated ether solvent. The concentration of the magnesium salt is 0.1-1.0 mol / L, and the volume ratio of the main solvent to the composite additive is (2-3.3):1. The preparation method includes the following steps: S1: Weigh a certain amount of magnesium salt and dissolve it in the main solvent, stirring for 6-8 hours to form solution A; S2: Slowly add the fluorinated ether solvent to solution A in S1, stirring for 6-8 hours to form solution B; S3: Add the amine solvent to solution B in S2, stirring for 6-8 hours to obtain the low-temperature fluorine-containing rechargeable magnesium battery electrolyte. Its application: The application of a low-temperature fluorine-containing rechargeable magnesium battery electrolyte in rechargeable magnesium batteries. The technical solution of this invention can improve the reversible magnesium deposition and dissolution performance of the electrolyte, and also improve the performance of Mg at low temperatures. 2+ The transport dynamics and ionic conductivity.

The present invention provides a method for preparing silicon dioxide nanoparticles and a method for preparing a heterojunction solar cell. The method for preparing silicon dioxide nanoparticles involves using an organic amine as a catalyst and a template agent and using tetraethyl orthosilicate as a precursor, adding a silicon source precursor to a target solution, and then performing temperature control to evaporate the organic amine solvent ethanol, making it difficult for the organic amine catalyst to come into contact with the reactant, thus greatly inhibiting the hydrolysis of tetraethyl orthosilicate, so that a two-dimensional network silicon dioxide nanostructure can be obtained. When a liquid containing the two-dimensional network silicon dioxide nanostructure is applied to a heterojunction solar cell, significant hydrophobicity and anti-reflection performance can be shown. In addition, the method for preparing silicon dioxide nanoparticles has a short reaction time and a simple preparation process and greatly saves the preparation cost.

The application discloses a kind of nanocomposite desulfurization and decarburization solvent and preparation method thereof, belong to natural gas desulfurization and decarburization technical field, including the following components: alcohol amine solvent 20wt%~65wt%, accelerator 5 wt%~40wt%, activating agent 5 wt%~20wt%, nanoscale oxide 0.1 wt%~1.5wt%, antifoaming agent 0.001 wt%~1wt%, corrosion inhibitor 0.0005 wt%~1wt% and the rest is water, total 100 wt%.The application has obvious applicability, avoids excessive removal of carbon dioxide, has obvious selective control advantage, through chemical absorption, physical absorption, nanoscale oxide mass transfer strengthening etc. Synergistic effect, can realize to meet the quality requirements of a kind of natural gas, while reasonably retaining carbon dioxide volume concentration in 2% (mol) ~3% (mol) range, can be popularized and applied to other industries similar gas desulfurization and decarburization.

The invention discloses a flue gas desulfurization and decarbonization integrated system. The system comprises an absorption tower, a carbon dioxide desorption tower and a bipolar membrane electrodialysis unit, wherein the bipolar membrane electrodialysis unit comprises a bipolar membrane electrodialysis device and a gas-liquid exchange membrane; according to the method, an alkaline organic amine solvent with high loading capacity and low volatility is selected for integrated absorption and gradient desorption, the solvent can be completely recycled, pure CO2 and SO2 product gases are obtained respectively, and the utilization modes of byproducts are diversified. The process provided by the invention can simultaneously achieve the effects of reducing pollution and reducing carbon, the process flow is simple, and the construction and operation costs are reduced.

The invention discloses a method for preparing high-purity lithium sulfide based on an organic amine solvent. The method comprises the following steps: reacting an anhydrous mixed solution containing elemental sulfur and metal lithium in a mixed state, removing a solvent through rotary evaporation after the reaction is completed, and washing and drying to obtain high-purity lithium sulfide, wherein the solvent in the anhydrous mixed solution is aprotic organic amine with nitrogen coordination atoms. The preparation method is simple in technological process, and the obtained lithium sulfide is high in purity, few in impurities and especially suitable for the high-end fields such as solid electrolyte.