302 results about "Boehmite" patented technology

The invention discloses a lithium battery diaphragm coating based on a nano material and application thereof, and relates to the technical field of lithium battery diaphragms. The coating comprises the following raw materials in parts by weight: 15-25 parts of polystyrene maleic anhydride copolymer modified polyvinylidene fluoride, 10-20 parts of polystyrene, 2-4 parts of nano silicon nitride, 3-6 parts of a boehmite / aluminum oxide and silicon dioxide composite material, 1-2 parts of a dispersing agent and 65-90 parts of a solvent, according to the lithium battery diaphragm coating provided by the invention, the wettability and absorptivity of a diaphragm to an electrolyte are remarkably improved, meanwhile, the lithium battery diaphragm coating also has excellent thermal stability, and the diaphragm can be effectively prevented from thermal shrinkage or melting under a high-temperature condition, so that the safety performance of a battery is remarkably enhanced.

The application discloses a porous aluminum-based carrier and a preparation method thereof, a CO2 adsorbent and application thereof. The preparation of the porous aluminum-based carrier comprises the following steps: segmental aging: a solution containing pseudo-boehmite is subjected to two-stage aging, the first stage is stirring aging, and the second stage is standing aging, the two kinds of aging modes are combined to improve the crystallinity of the pseudo-boehmite; organic solvent washing and pore expansion: the pseudo-boehmite is filtered out, and is subjected to water washing first and then organic solvent washing; segmental drying: low-temperature air blowing drying and vacuum drying are combined, the drying mode, the drying temperature and the solvent evaporation rate during drying are adjusted to avoid pore shrinkage or collapse caused by excessively high drying temperature and excessively fast solvent evaporation speed. The preparation of the porous aluminum-based carrier is simple in operation and low in energy consumption, and the CO2 adsorbent prepared from the porous aluminum-based carrier and an organic amine has excellent adsorption performance such as high adsorption capacity, fast adsorption rate and high stability.

The invention provides a method for preparing high-purity macroporous pseudo-boehmite, which comprises the following steps: putting organic aluminum alkoxide into a quartz tube of a tube furnace, then introducing mixed steam of water and an organic solvent into the quartz tube, enabling the organic aluminum alkoxide to be in contact with the mixed steam, and carrying out hydrolysis reaction to generate amorphous pseudo-boehmite, and carrying out aging treatment on the obtained amorphous pseudo-boehmite through a solvent / hydrothermal method to finally obtain the macroporous pseudo-boehmite with high purity and good crystallinity. The macroporous pseudo-boehmite prepared by the method has the advantages of simple and easy-to-control process flow, high product purity, easy recovery of hydrolysate and the like, and is suitable for industrial popularization and application.

The invention discloses a preparation device of pseudo-boehmite, which relates to the technical field of chemical equipment and comprises a reaction kettle, an electrode column, a grating and a stirring shaft. The invention also discloses a preparation method of the pseudo-boehmite preparation device. The preparation method comprises the following steps: material addition, colloid generation, aging, gibbsite conversion and repeated charging. The inner kettle and the outer kettle are arranged, a sodium aluminate solution and carbon dioxide are subjected to a neutralization reaction in the inner kettle to generate pseudo-boehmite colloid, part of gibbsite generated due to slow reduction of the pH value in the reaction process is precipitated at the bottom end of the inner kettle, and the pseudo-boehmite colloid can directly enter the outer kettle to be subjected to aging treatment after being generated; gibbsite can be heated at the bottom end of the inner-layer kettle to be converted into monohydrate gibbsite, and the monohydrate gibbsite can enter the outer-layer kettle along with subsequent pseudo-boehmite to be aged, so that the gibbsite can be directly converted and recycled in the preparation process of the pseudo-boehmite.

The invention provides a preparation method of pseudo-boehmite with high bulk specific gravity, and belongs to the field of pseudo-boehmite. The method comprises the following steps: carrying out a low-temperature neutralization reaction on an aluminum salt solution and a sodium metaaluminate solution, and keeping the pH value of a neutralized material at 6-6.5 in the reaction process to obtain amorphous precursor slurry; carrying out solid-liquid separation on the amorphous precursor slurry to obtain first mixed slurry; performing high-temperature aging crystal transformation reaction on the first mixed slurry and sodium carbonate to obtain macroporous pseudo-boehmite slurry; performing solid-liquid separation on the macroporous pseudo-boehmite slurry to obtain second mixed slurry; carrying out modification treatment on the second mixed slurry and acid or acid aluminum salt so as to re-agglomerate the non-peptized macroporous pseudo-boehmite to obtain third slurry; performing solid-liquid separation on the third slurry to obtain fourth mixed slurry; and carrying out spray drying on the fourth mixed slurry to obtain the pseudo-boehmite. Therefore, the bulk density of the pseudo-boehmite is improved.

The invention discloses a light diffusion polystyrene composite material with a low thermal expansion coefficient, a preparation method thereof and an application of the light diffusion polystyrene composite material in extrusion molding of a frameless television display screen backlight plate. The composite material is prepared from the following raw materials in parts by mass: 35 to 45 parts of GPPS (General Purpose Polystyrene) resin, 20 to 30 parts of HIPS (High Impact Polystyrene) resin, 8 to 15 parts of PPO (Polyphenylene Oxide) resin, 3 to 5 parts of compatilizer, 5 to 10 parts of light diffusant, 5 to 15 parts of filling mineral and 3 to 5 parts of liquid crystal polymer fiber, the filling minerals comprise one or more than two of high-whiteness nano synthetic mica, nano boehmite and magnesium sulfate whiskers; the whiteness L value of the high-whiteness nano synthetic mica is gt; 92; the average length of the magnesium sulfate whisker is 10-60 [mu] m, and the length-diameter ratio is gt; 30.

The invention belongs to the technical field of catalyst carrier materials, and particularly relates to a preparation method of mesoporous ultra-stable aluminum oxide. Pseudo-boehmite is prepared by adopting a double-aluminum method, alumina powder is obtained after roasting, a layer of fibrous pseudo-boehmite is prepared in the pore structure of the alumina powder, and the pore structure and the specific surface area of mesoporous super-stable alumina are controlled by controlling the crystallization pH value and the crystallization temperature in the reaction process. Sodium silicate and hexamethyldisilazane are added in the preparation process, so that the high-temperature stability of the mesoporous super-stable aluminum oxide is effectively improved, and the mesoporous super-stable aluminum oxide still has good specific surface area and pore volume under a hydrothermal condition. The mesoporous stable alumina is prepared by taking sodium metaaluminate and aluminum sulfate as main raw materials, and an organic solvent is not added as a template agent in the preparation process, so that volatilization of the organic solvent is effectively avoided, and the mesoporous stable alumina is green and environment-friendly.

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention belongs to the technical field of spherical aluminum oxide preparation, and particularly discloses a method for preparing spherical aluminum oxide through an oil ammonia column forming process. The preparation method comprises the following steps: firstly, uniformly mixing pseudo-boehmite or boehmite powder with a dilute acid solution to prepare aluminum sol; the upper layer of the oil ammonia column is an oil phase, the lower layer of the oil ammonia column is an ammonia water phase containing a macromolecular thickening agent, and a surfactant is added to an interface while the aluminum sol is dropped into the oil ammonia column through a forming needle, so that the aluminum sol is pelletized and gelled and cured. And finally, taking out the gel beads, drying and roasting to obtain the spherical alumina carrier. The spherical aluminum oxide prepared by the method is high in sphericity degree and high in crushing strength, and can be used as a catalyst carrier for various catalytic reactions.

The invention belongs to the field of abrasive material preparation, and particularly relates to a preparation method of a mixed ceramic corundum abrasive material, which is characterized by comprising the following steps: 1) putting alumina powder into a ball milling tank, adding water with the same mass as the alumina powder, and carrying out ball milling until the particle size of powder d50 is 8-12 microns to obtain slurry A; (2) mixing boehmite powder, phosphoric acid with the mass concentration of 20-30% and water according to the mass ratio of 1: 4.5: 4.5, and stirring to a sol state to obtain slurry B, the particle size of particles d50 in the slurry B being less than 1 mu m; 3) mixing the slurry A, the slurry B and white corundum particles with d50 particle size of 25-35 [mu] m according to a mass ratio of 2.8-3.2: 4.5-5.5: 3, adding a shrinkage binder and a sintering aid, mixing again, and drying the mixed slurry in a drying chamber at 80 DEG C. 4) calcining to obtain a blocky abrasive material, and 5) crushing and grading The method has the advantages of simple process, less equipment investment, low production cost, good microcosmic compactness and high density of the abrasive material.

The invention provides boehmite and a preparation method thereof, and the preparation method comprises the following steps: mixing ammonium alum, an alkaline additive and a solvent to obtain a mixed solution, and carrying out hydrothermal treatment on the obtained mixed solution to obtain boehmite. According to the preparation method provided by the invention, the ammonium alum is adopted as a raw material and is mixed with the alkaline additive and the solvent, and then hydrothermal treatment is performed to prepare the boehmite, so that the preparation cost is relatively low, and the boehmite is obtained through one-step reaction, and therefore, the preparation method has the advantage of simple preparation process; in addition, in the preparation method, one or more impurity removal processes do not need to be carried out on the ammonium alum, so that the preparation process is further simplified, and the preparation cost is reduced.

The invention provides a preparation method of sphere-like nano boehmite and sphere-like nano aluminum oxide, and belongs to the field of fine aluminum oxide. The method comprises the following steps: carrying out acid pickling pretreatment on industrial alumina powder to obtain a first pretreated raw material; carrying out hydration reaction on the rho-aluminum oxide to obtain second pretreatment slurry containing boehmite and Bayer stone; mixing the first pretreatment raw material, the second pretreatment slurry, a pH regulator and a crystal growth regulator to obtain mixed slurry; the mixed slurry is subjected to a hydrothermal reaction, and the sphere-like nanometer boehmite is obtained. Boehmite generated by low-temperature hydration of a raw material rho-aluminum oxide is used as a seed crystal to reduce the hydrothermal reaction temperature, and a pH regulator and a crystal growth guiding agent cooperate to promote the growth speed of each crystal face, promote the centripetal contraction force of liquid surface molecules and promote the boehmite generated by the hydrothermal reaction to be in a sphere-like shape. Therefore, the invention provides the preparation method of the sphere-like nano boehmite which is short in process and complete in crystallinity.

The invention relates to the technical field of alumina material preparation, in particular to macroporous pseudo-boehmite and a combined preparation method thereof. The preparation method comprises the following steps: carrying out neutralization reaction on carbon dioxide and a sodium aluminate solution to obtain neutralized slurry; performing first aging treatment on the neutralized slurry to obtain first aged slurry; filtering the first aged slurry to obtain a solid-phase material and a liquid-phase material; sequentially washing and drying the solid-phase material to obtain a first macroporous pseudo-boehmite product; aluminum sulfate and the sodium aluminate solution are subjected to parallel flow neutralization, and aluminum hydroxide slurry is obtained; mixing the aluminum hydroxide slurry with the liquid-phase material, and then carrying out second aging treatment to obtain second aged slurry; performing post-treatment on the second aged slurry to obtain a second macroporous pseudo-boehmite product; and collecting the two macroporous pseudo-boehmite products in batches. According to the preparation method, pseudo-boehmite with different pore structure characteristics is respectively prepared through two neutralization technologies based on three mechanisms of staged treatment, material recycling and structure complementation.

The invention discloses a continuous synthesis device and method for pseudo-boehmite, and belongs to the field of chemical material synthesis. The device comprises a raw material storage tank, a rotary liquid membrane reactor, a stirring tank, a tubular reactor, a vibration motor and a heating device. Three raw materials stored in different raw material storage tanks are conveyed into a liquid membrane reactor through a pump in a parallel flow mode, slurry generated after reaction flows into a stirring tank by means of gravity and then is conveyed into a tubular reactor which is placed in a heating device and preheated to a set temperature through a pump, and the tubular reactor and a vibration motor are fixed to the same vibration platform. The vibration motor is arranged outside the heating device, and vibration waves generated during operation of the vibration motor are conducted to the tubular reactor through the vibration platform. The slurry is aged in the tubular reactor and enters a product collecting tank after flowing out. The obtained pseudo-boehmite is uniform in particle size distribution, the particle size fluctuation range is small in the continuous synthesis period, energy consumption is reduced through continuous preparation, and efficiency is improved.

The invention relates to a boehmite reaction kettle water circulation cooling system, and relates to the field of reaction kettle cooling equipment, the boehmite reaction kettle water circulation cooling system comprises a reaction kettle, a preheating tank, a water storage tank with a water inlet and a water outlet, and a heat exchanger, a cooling pipe is arranged in the reaction kettle, one end of the cooling pipe is a first water inlet end, and the other end of the cooling pipe is a first water outlet end; a heating pipe is arranged in the preheating tank, one end of the heating pipe is a second water inlet end, and the other end of the heating pipe is a second water outlet end; the second water inlet end is communicated with the first water outlet end; a water inlet of the water storage tank is communicated with the second water outlet end; the hot water inlet end of the heat exchanger is communicated with the water outlet of the water storage tank, and the cold water outlet end of the heat exchanger is communicated with the first water inlet end of the cooling pipe. The method has the effect of improving the energy utilization efficiency.

The invention relates to a ternary positive electrode material and a preparation method thereof, a positive electrode and a battery, the ternary positive electrode material comprises an inner core and a coating layer coating the surface of the inner core, and the coating layer is prepared by roasting raw materials including boehmite and aluminum oxide; wherein the mass ratio of the boehmite to the aluminum oxide is (1-2.33): 1. The surface of the inner core is coated with the coating layer prepared by roasting the raw materials including boehmite and aluminum oxide, so that the stability and the conductivity of the positive electrode coating layer can be improved, and furthermore, the Li < + > mobility is improved, the metal dissolution is reduced, the impedance is reduced, and the cycle performance is improved.

The invention provides diaphragm coating slurry, a composite diaphragm, a preparation method of the composite diaphragm and a lithium ion battery containing the composite diaphragm. The composite diaphragm comprises a porous diaphragm base material and a coating located on one side or two sides of the porous diaphragm base material, the coating comprises an active adsorption material, a coupling agent, a binding agent and a dispersing agent, the active adsorption material is selected from one or more of gamma-aluminum oxide, pseudo-boehmite, titanium hydroxide and a molecular sieve, and the coupling agent is selected from one or more of a coupling agent, a binding agent and a dispersing agent. The porosity of the composite diaphragm is greater than or equal to 40%. The composite diaphragm disclosed by the invention can greatly reduce the gas concentration in the battery, and meanwhile, the thermal stability, the electrolyte wettability and the porosity of the diaphragm are also improved to a certain extent.

The present invention belongs to the technical field of catalyst carrier materials, and specifically relates to a method for preparing mesoporous ultra-stable alumina. The present invention adopts a double aluminum method to prepare pseudo-boehmite, obtains alumina powder after calcination, and prepares a layer of fibrous pseudo-boehmite in the pore structure of the alumina powder. The pore structure and specific surface area of the mesoporous ultra-stable alumina are controlled by controlling the crystallization pH value and crystallization temperature during the reaction process, and sodium silicate and hexamethyldisilazane are added during the preparation process, which effectively improves the high-temperature stability of the mesoporous ultra-stable alumina, so that it still has good specific surface area and pore volume under hydrothermal conditions. The present invention uses sodium metaaluminate and aluminum sulfate as the main raw materials to prepare mesoporous stable alumina. No organic solvent is added as a template during the preparation process, which effectively avoids the volatilization of the organic solvent and is green and environmentally friendly.

The present invention relates to a low-ammonia ratio fixed-bed catalyst for preparing 6-aminocapronitrile by a vapor phase process and a preparation method thereof. The fixed-bed catalyst comprises the following components, based on 100 wt% of the total weight of the catalyst: a) 15-50 wt% of silicalite-1 molecular sieve; b) 10-30 wt% of aluminum nitride; c) 5-25 wt% of silicon oxide provided as silica sol; d) 5-10 wt% of aluminum oxide provided as pseudo-boehmite; and e) 5-10 wt% of attapulgite. The catalyst of the present invention exhibits high conversion and selectivity in the vapor phase process for preparing 6-aminocapronitrile under low ammonia ratio conditions, thereby improving the competitiveness of the device.

The invention relates to the technical field of preparation of nano boehmite, in particular to a preparation method and application of dispersed nano boehmite. The preparation method comprises the following steps: mixing an interfacial agent, urea and an aluminum salt aqueous solution through a sol-gel method to form a uniformly dispersed boehmite precursor solution; then, carrying out aging treatment on the precursor solution to form an aging reaction material; and finally, carrying out hydrothermal reaction to obtain a nano boehmite product with good dispersity under the conditions of high temperature and high pressure. According to the preparation method, a three-stage synergistic mechanism of uniform nucleation, dual stable agglomeration inhibition of an interfacial activity regulating agent and crystal face selective adsorption guide morphology evolution is realized through a urea slow-release alkaline environment, the technical bottlenecks of poor dispersity and uncontrollable morphology in traditional boehmite preparation are broken through, and finally, the preparation method has the advantages that the preparation efficiency is high, and the preparation cost is low. The purity of the obtained dispersing type nano boehmite is up to 99.9% or above, and the dispersing type nano boehmite has excellent physical properties.

Provided is a fluid catalytic cracking catalyst including faujasite-type zeolite, boehmite, a binder, and clay minerals, and satisfying the following formulas (1) and (2) in powder X-ray diffraction analysis:A / B≤1.2(1)A / C≥0.8(2)in the formulas (1) and (2), A is an integrated intensity of a diffraction peak attributed to (020) plane of the boehmite, B is an integrated intensity of a diffraction peak attributed to (120) plane of the boehmite, and C is an integrated intensity of a diffraction peak attributed to (331) plane of the faujasite-type zeolite.

The invention discloses a method for preparing gamma aluminum oxide nanosheets based on precise regulation and control of complex precipitation, which comprises the following steps: introducing an organic complexing agent into a water phase system, constructing an organic-inorganic mixed solvent environment, and inducing an aluminum precursor to generate two-dimensional oriented growth under an alkaline condition to obtain a flaky boehmite precursor; then carrying out high-temperature calcination to prepare gamma aluminum oxide nanosheets; the preparation method is simple in process, mild in condition and easy for large-scale preparation, and the prepared gamma aluminum oxide nanosheet can still keep stable sheet-shaped morphology and gamma phase structure after being re-sintered for five times at 1000 DEG C, has a hierarchical pore structure and a specific surface area of more than 40 m < 2 > / g, and shows excellent high-temperature structural stability; the material can be widely applied to the fields of high-temperature catalyst carriers, adsorption separation materials, advanced ceramics and the like, and has a good application prospect.

A catalyst for fluid catalytic cracking is provided which contains faujasite-type zeolite, boehmite, a binder and clay minerals and which satisfies the following formulas (1) and (2) in powder X-ray diffraction analysis: A / B ≤ 1 .2 A / C ≤ 0.8 where in formulas (1) and (2), A is the integrated intensity of a diffraction peak assigned to the (020) plane of boehmite, B is the integrated intensity of a diffraction peak assigned to the (120) plane of boehmite, and C is the integrated intensity of a diffraction peak assigned to the (33 1) plane of the faujasite-type zeolite.

The invention discloses polishing powder for an automobile paint surface and a preparation method of the polishing powder. The preparation method comprises the following steps: preparing a mixed solution; preparing a roasting material from the mixed solution and pseudo-boehmite, wherein the specific surface area of the roasting material is 30-60m < 2 > / g; grinding the roasted material to obtain aluminum oxide slurry; adding a coupling agent and a dispersing agent into the aluminum oxide slurry, and reacting under a stirring condition to prepare mixed slurry; and carrying out post-treatment on the mixed slurry to obtain the polishing powder of which the particle size distribution D50 is in a range of 0.6-0.9 mu m and the particle size distribution D100 is less than 10 mu m. According to the preparation method of the polishing powder, the prepared polishing powder has good polishing performance, the surface smoothness of a polished automobile paint surface is improved, the polishing powder is easy to store and transport, and the production cost can be effectively reduced.

The invention provides an iron-pollution-resistant catalytic cracking catalyst and a preparation method thereof, and the iron-pollution-resistant catalytic cracking catalyst comprises the following raw materials: a mesoporous and macroporous material, a zinc-aluminum composite material and a molecular sieve, wherein the mesopore and macropore material comprises kaolin and first zinc salt loaded in pores of the kaolin; the zinc-aluminum composite material is obtained by performing solid-phase ball milling on pseudo-boehmite and second zinc salt. The catalytic cracking catalyst provided by the invention has abundant mesopore and macropore structures and excellent iron resistance.

The application discloses a coal gangue-based composite fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of fluorine removal materials. The preparation method comprises the following steps: mixing coal gangue and an alkali metal chloride aqueous solution to obtain a suspension, adding a soluble aluminum salt solution at 50 DEG C-95 DEG C, controlling the pH value to be 8-11, and generating a coprecipitation reaction to obtain a coal gangue-based composite fluorine removal agent with boehmite loaded on the coal gangue. In the preparation, the coal gangue is used as a carrier, and the boehmite is loaded on the surface of the coal gangue through a simple coprecipitation method, so that the coal gangue-based composite fluorine removal agent is obtained. According to the preparation method, the problem that the fluorine removal cost is high and the aluminum (hydrogen) oxide is prone to agglomeration when the aluminum (hydrogen) oxide is used as an adsorbent alone is effectively solved.

The application relates to the technical field of catalyst material preparation, and particularly discloses a monolithic spinel honeycomb catalyst, a preparation method and application thereof. The catalyst comprises a honeycomb carrier and a catalytic coating layer loaded on the surface and the inner wall of the pores of the honeycomb carrier, the catalytic coating layer has gamma-Al2O3 as a continuous phase, and spinel phase main active components, cerium oxide oxygen vacancy regulating components and lanthanum, strontium and magnesium oxide structure stabilizing aids are dispersed in the continuous phase. The preparation method comprises the following steps: preparing pseudo-boehmite into an aluminum sol, mixing the aluminum sol with a metal salt solution to obtain a doped aluminum sol, coating, and performing programmed temperature calcination, so that the active components are anchored on the surface of the gamma-Al2O3 in the form of spinel skeleton atoms, and a spinel-alumina-metal oxide composite structure is formed. The application effectively solves the problems of low utilization rate of active components, easy peeling of the coating layer and poor high-temperature stability of the traditional coating type monolithic catalyst, and has a wide application prospect in the efficient decomposition and treatment of N2O.

The invention discloses a boehmite crushing device and method based on instantaneous self-shunting, and belongs to the technical field of superfine powder processing. In order to solve the problems of over-crushing, high energy consumption, wide product particle size distribution, serious internal pollution and the like of the existing crushing device, the device comprises a vertical crushing cavity, a supersonic airflow nozzle is tangentially arranged on the side wall of the vertical crushing cavity, a static self-shunting unit is arranged at the top of the vertical crushing cavity, the static self-shunting unit comprises a central cone and an annular collecting channel, and a coarse powder loop is arranged at the bottom of the vertical crushing cavity. The method comprises the following steps: forming a strong rotational flow field by utilizing tangential supersonic airflow to collide and crush materials, realizing instantaneous self-shunting of coarse and fine powder by utilizing the synergistic effect of centrifugal force generated by rotational flow and central negative pressure, collecting and discharging the fine powder from the top, and recycling and circularly crushing the coarse powder from the bottom. According to the invention, crushing and sorting are carried out synchronously, the over-crushing phenomenon is eliminated fundamentally, and the device has the advantages of low energy consumption, uniform product granularity, high purity and easiness in control.

The invention discloses a high-conductivity and high-adhesion lithium ion battery diaphragm and a preparation method and application thereof.The high-conductivity and high-adhesion lithium ion battery diaphragm comprises a base membrane and a coating on the base membrane, the coating comprises polyvinylidene fluoride-hexafluoropropylene copolymer, ceramic powder, functional filler, polyvinylpyrrolidone and solid electrolyte, the functional filler is a metal organic framework material, and the ceramic powder is at least one of aluminum oxide and boehmite. The slurry is prepared through a step-by-step method, it is guaranteed that the functional filler and the ceramic powder are evenly dispersed, the functional filler can construct a high-speed lithium ion transmission channel, the ceramic powder can synchronously improve the mechanical effect and the thermal stability of the coating, and finally collaborative optimization of the ionic conductivity, the mechanical strength and the thermal stability of the diaphragm is achieved; and the optimal performance balance is realized under the raw material ratio, so that the lithium ion battery diaphragm with excellent comprehensive performance is obtained.

The invention relates to a method for recycling copper tailings in a segmented and quality-divided manner, which comprises the following steps: S1, roasting the copper tailings to obtain roasted slag; s2, adding alkali into the roasting slag, dissolving, and filtering to obtain alkali-dissolved filter slag and alkali-dissolved filtrate; s3, adding an acid into the alkali dissolution filtrate for precipitation, and filtering to obtain an acid precipitation precipitate and an acid precipitation filtrate; s4, carrying out refining and hydrothermal reaction on the acid precipitation precipitate to obtain boehmite; and adding potassium salt into the acid precipitation filtrate, and performing evaporative crystallization to obtain potassium sulfate. According to the method, the copper tailings are treated through cooperation of roasting and alkali dissolution, sulphoaluminate can be decomposed, dissolution of sulfur and aluminum elements can be promoted, potassium sulfate and boehmite which are high in additional value are recycled in a segmented and quality-divided mode, and the comprehensive utilization rate of the copper tailings is remarkably increased. In addition, the problem that the building material expands and cracks due to sulfate can be avoided through recovery of the sulfur element in the copper tailings.