314results about How to "Low reaction temperature" patented technology

A purification method for purification and impurity removal of metal rubidium and cesium performs purification and impurity removal treatment on metal rubidium and cesium through external introduction of elements, and specifically comprises the following process steps and conditions: (1) firstly, putting metal lead particles into a porous and liftable stainless steel mesh; secondly, transferring a penicillin bottle in which the primary metal rubidium / cesium liquid is sealed in a vacuum manner into a glove box protected by argon, opening a penicillin bottle cap to transfer the primary metal rubidium / cesium liquid into a reaction tank, and then putting the reaction tank and a stainless steel mesh into a well type resistance vacuum furnace together to finish charging operation; and (2) heating the reaction tank after the charging operation by using a resistance heater, raising the temperature of the furnace to 50-320 DEG C, keeping the temperature for 2-10 hours, and then carrying out solid-liquid separation to obtain the high-purity metal rubidium / cesium, so that Li / Na impurities can be effectively removed, a high-purity metal rubidium / cesium product is prepared, and the production cost is reduced. And the method has the advantages of short process flow, low energy consumption, low reaction temperature, simplicity and convenience in equipment operation, lower manufacturing cost, variable specification, investment saving, environmental pollution reduction, raw material cost reduction and the like.

The invention discloses a synthesis method of vitamin C ethyl ether, and belongs to the technical field of vitamin derivative synthesis. The synthesis method comprises the following steps: adding vitamin C, benzaldehyde and a catalyst into a first organic solvent, carrying out an aldolization reaction, adding an organic alkali after the aldolization reaction is finished, carrying out a neutralization reaction, adding an alkylation reagent, carrying out an alkylation reaction, and removing the first organic solvent after the alkylation reaction is finished, so as to obtain the vitamin C benzaldehyde. The preparation method comprises the following steps: adding a first organic solvent into a first organic solvent, pulping, filtering, collecting filter residues, washing and drying to obtain 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, carrying out hydrogenation deprotection on the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, filtering after hydrogenation deprotection, collecting filtrate, crystallizing, collecting precipitate, washing and drying to obtain the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid. The vitamin C ethyl ether is obtained. The synthesis method provided by the invention is simple to operate and high in production efficiency, and the obtained vitamin C ethyl ether is high in yield and purity.

The invention provides a mining inorganic environment-friendly reinforcing material and application thereof, and belongs to the technical field of mining reinforcing materials. A component A comprises the following components in parts by mass: 60-80 parts of anhydrite, 5-20 parts of lime, 5-10 parts of silica fume, 2-8 parts of sodium silicate, 1-0.5 part of a naphthalene water reducer, 3-7 parts of an early strength agent and 0.2-0.8 part of lithium salt; the component B comprises the following components in parts by mass: 50-70 parts of cement clinker, 10-30 parts of slag cement, 5-10 parts of iron powder, 1-8 parts of aluminum sulfate, 5-10 parts of calcium carbonate and 0.5-1 part of sodium tripolyphosphate; the component C is prepared from the following components in parts by mass: 10 to 25 parts of water glass, 10 to 20 parts of emulsion, 40 to 60 parts of water, 5 to 10 parts of high-efficiency water reducing agent and 1 to 5 parts of triethanolamine. The mining inorganic environment-friendly reinforcing material provided by the invention is low in reaction heat and is not easy to cause coal combustion.

The invention discloses a boron modified Kevlar aerogel flame-retardant thermal insulation material and a preparation method thereof, a solvothermal method is adopted to prepare boron modified Kevlar initial state gel, the solvothermal method is a totally-closed reaction system, and the reaction temperature is relatively low (100-160 DEG C), so that the boron modified Kevlar aerogel sol-gel process is simple, the reaction conditions are mild, and the boron modified Kevlar aerogel flame-retardant thermal insulation material is suitable for industrial production. No environmental pollution is caused in the reaction process, and industrial production is easy to realize.

The invention discloses a method for directly repairing and regenerating a ternary positive electrode recycled material. The method comprises the following steps: S1, disassembling a ternary retired battery; s2, sintering to remove impurities; s3, removing powder and sieving; s4, mixing with crystalline lithium salt; s5, crushing and sieving after sintering and cooling; s6, mixing with a metal oxide; and S7, sintering, cooling, removing iron, and sieving. The eutectic lithium salt is used as a lithium source for lithium supplement, so that the diffusion rate of lithium ions can be increased, the concentration of the lithium ions can be improved, the reaction temperature of lithium supplement recovery can be reduced, and the energy consumption can be reduced. The ternary lithium battery is wrapped by the metal oxide, residual lithium on the surface of the material can be utilized, a layer of fast ion conductor can be formed on the surface of the material in situ, and the residual lithium on the washed surface is removed, so that the process is shortened, the cost is reduced, the transmission rate of lithium ions can be further improved, and the rate capability of the battery is improved. And the fast ion conductor structure can isolate the contact between the electrolyte and the positive electrode material, so that side reaction is reduced, and the cycle performance is improved.

The invention is suitable for the technical field of catalyst preparation, and provides a high-stability ruthenium-based catalyst and a preparation method thereof.The preparation method comprises the following steps that ruthenium salt, doped salt and molten salt are ground to be evenly mixed, poured into a porcelain boat, subjected to heat preservation at 550 DEG C for 3-5 h, taken out after being naturally cooled, heated in a water bath and then washed with water, then soaked with 0.5 mol / L sulfuric acid for 24 h and subjected to ultrasonic treatment for 2 h, and the high-stability ruthenium-based catalyst is obtained; and continuously washing with water, washing with absolute ethyl alcohol once, and drying to obtain the product. The performance of the catalyst is improved by replacing part of Ru atoms with Ge atoms; by adopting the improved molten salt method, the operation steps are simplified, and the reaction temperature is reduced. After the catalyst is subjected to water bath heating, acid soaking and ultrasonic treatment, uniform dispersion is realized, and salt residues are reduced. The method is simple and safe to operate, the adopted molten salt is low in price and has the potential of large-scale production, and the activity, dispersity and stability of the catalyst are further improved.

The invention provides a method for promoting low-temperature roasting of lepidolite hydrosulfate to extract lithium based on mechanical activation. The method comprises the following steps: S1, providing a mixture; the mixture comprises lepidolite and disulfate, and the mass percent of the disulfate and the lepidolite is 35-45%; s2, carrying out mechanical activation treatment on the mixture to obtain a precursor material; the mechanical activation treatment comprises the steps that the mixture is subjected to ball milling, the ball-to-material ratio adopted in the ball milling is (2-6): 1, the rotating speed of the ball milling is 500-800 rpm, and the ball milling time is 1.8-6 h; s3, roasting the precursor material to obtain a roasted clinker; the roasting temperature is 400 to 800 DEG C; and S4, the roasting clinker is sequentially subjected to water leaching and solid-liquid separation, and a lithium-containing leaching solution is obtained. According to the method, the lithium in the lepidolite can be efficiently leached under the conditions of low auxiliary material ratio, low roasting temperature and water leaching.

The invention discloses a method for synergistically hydro-thermally treating sludge based on tea residue and organic acid, which comprises the following steps: mixing sludge with organic acid and tea residue, and performing hydro-thermal treatment and dehydration treatment on the obtained mixed slurry to obtain filtrate and a mud cake. According to the method for carrying out the synergistic hydrothermal treatment on the sludge based on the tea residues and the organic acid, the hydrothermal reaction temperature can be remarkably reduced under the synergistic effect of the tea residues and the organic acid, meanwhile, the sludge is subjected to the synergistic hydrothermal treatment through the organic acid and the tea residues, the dehydration performance of the sludge can be effectively improved, and meanwhile generation of nondegradable organic matter such as melanoidins can be effectively inhibited; therefore, efficient, environment-friendly, recycling and low-cost treatment of the sludge can be realized by fully utilizing the characteristics of the organic acid and the tea residues and cooperating with a hydrothermal treatment technology, and the method has the advantages of low reaction temperature, high treatment efficiency, low energy consumption, good dehydration effect, greenness, environmental protection and the like; wide application prospects and popularization values are realized.

The utility model discloses equipment for producing high-purity methyl ethyl ether, which relates to the field of synthesis of chemical compounds and comprises a reaction device, a heating component, a cold bath tank, a crude product receiving tank, a heavy component removal tower, a light component removal tower, a first reboiler, a second reboiler, a first condenser, a second condenser, a recovery tank, a product receiving tank and a controller, raw materials including sodium methoxide and halogenated ethane directly react under the anhydrous condition, a catalyst is not needed, crude methyl ethyl ether is produced, then the crude methyl ethyl ether enters a heavy component removal tower, crude methyl ethyl ether gas with heavy components removed enters a light component removal tower from the top of the light component removal tower after being detected to be qualified through a first online analysis and detection component, light component removal rectification is conducted, and methyl ethyl ether is obtained. Gas-phase impurities at the top of the light component removal tower are analyzed through the second online analysis and detection part, when the gas-phase impurities are detected to be qualified, the methyl ethyl ether product enters the product receiving tank, and then the high-purity methyl ethyl ether product is produced through continuous rectification, so that the product purity is high, the reaction temperature is low, the energy consumption is reduced, the reaction yield is high, and the production cost is low.

The invention discloses a non-noble metal copper-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a copper source and a second metal source in a solvent to obtain a precursor prefabricated solution, dropwise adding an alkaline solution to adjust the pH value of the precursor prefabricated solution to 7-13, keeping for 4-12 hours in an oil bath environment of 60-100 DEG C, aging, filtering, washing and drying to obtain a solid precursor; and putting the obtained solid precursor into a muffle furnace, heating to 200-800 DEG C in an air atmosphere, and roasting for 1-9 hours to obtain the non-noble metal copper-based catalyst. Wherein the second metal source is an aluminum source, a magnesium source, a zinc source, a zirconium source or a cobalt source; the catalyst can realize complete conversion (100%) of acetylene and selectivity of more than 95% of ethylene at a low temperature (180 DEG C) and a high space velocity (18000 ml / gcat / h), does not inactivate after more than 150 h under repeated cycle tests, and has important significance for industrial production.

The invention relates to bio-based 1, 4-butanediol and a preparation method thereof, and belongs to the technical field of chemical raw material synthesis. The preparation method of the bio-based 1, 4-butanediol comprises the following steps: preparing a bio-based 1, 4-succinic acid solution; continuously feeding the obtained bio-based 1, 4-succinic acid solution and hydrogen into a fixed bed containing a first-stage nickel-copper catalyst, and carrying out hydrogenation reaction to obtain a first-stage product; continuously feeding the obtained first-stage product and hydrogen into a fixed bed containing a second-stage nickel-copper catalyst, and carrying out hydrogenation reaction to obtain a second-stage product; and feeding the obtained second-stage product into a separation tower for separation and purification to obtain the bio-based 1, 4-butanediol. According to the method, the polymer-grade bio-based 1, 4-butanediol is prepared through continuous liquid phase hydrogenation of the bio-based 1, 4-succinic acid, the purity of the obtained polymer-grade bio-based 1, 4-butanediol is larger than or equal to 99.90%, and the product does not contain methyl-1, 4-butanediol and does not contain 2-(4-hydroxybutoxy)-tetrahydrofuran.

The invention discloses isosorbide type block copolycarbonate as well as a preparation method and application thereof, and belongs to the technical field of organic polymer materials. The problems that isosorbide polycarbonate in the prior art is low in molecular weight, deep in color and luster, fragile in material and the like are solved. The preparation method comprises the following steps: carrying out melt ester exchange polycondensation reaction on dihydric alcohol and isosorbide carbonate serving as raw materials to obtain dihydroxyl-terminated isosorbide ester glycol; rigid amorphous dihydroxyl-terminated isosorbide ester glycol and oligomeric flexible chain dihydric alcohol are connected together, and a molecular chain is reformed, arranged and branched to a certain extent, so that the isosorbide type block copolycarbonate is effectively synthesized. According to the method, the oligomeric flexible chain dihydric alcohol can be effectively introduced to improve the molecular weight and the mechanical property of the isosorbide polycarbonate, so that the problems that the isosorbide polycarbonate is too strong in structural rigidity, fragile in material, deep in color and the like in production and application are solved.

The invention discloses a continuous preparation method of dodecyl diphenyl ether, and belongs to the technical field of organic synthesis. The continuous preparation method comprises the following steps: respectively injecting diphenyl ether, olefin and a catalyst into a micro-channel through a feeding pump and a gas flowmeter pump for reaction, collecting reaction liquid, and carrying out post-treatment on the reaction liquid to obtain dodecyl diphenyl ether. According to the method, a continuous preparation process is adopted, a gas catalyst is used, the use amount of the catalyst is greatly reduced, post-treatment steps are reduced, the reaction time is greatly shortened, meanwhile, the purity and yield of the product can reach 99% or above, and the reaction raw materials can be recycled and are green and environment-friendly.

The invention discloses a method for synthesizing branched polyester by using polyester and a carbon dioxide derivative and a product thereof. The method comprises the following steps: carrying out solid-phase ester exchange reaction on a carbon dioxide derivative and polyester under inert gas protection and heating conditions to obtain branched polyester; the carbon dioxide derivative is prepared from at least one of 3-ethylidene-6-vinyl tetrahydro-2H-pyran-2-ketone and a homopolymer pEVL (Poly (Ethylene Vinyl Vinyl) L) thereof. According to the invention, a large amount of polyester materials and carbon dioxide wastes can be utilized, so that the current relatively difficult problems of carbon emission and pollution are solved.

A device and method for continuous fluorination of perfluoropolyether end groups, belonging to the technical field of fluorine chemical industry. In the device, an ultraviolet mercury lamp (9) is placed in a cold trap (8), the cold trap (8) is placed in a liquid storage tank (6), the volute mixer (3) is connected to a tubular reactor (7), the tubular reactor (7) is spirally wound around the cold trap (8), and the liquid storage tank (6) is filled with pure water. The method steps are as follows: pure water is introduced into the liquid storage tank (6), and the ultraviolet mercury lamp (9) is turned on; a mixed gas of perfluoropolyether with unsaturated groups and fluorine gas is introduced into the volute mixer (3); under the ultraviolet irradiation condition of the ultraviolet mercury lamp (9), the material fully mixed by the volute mixer (3) enters the tubular reactor (7) for fluorination end-capping reaction. The present invention improves the yield and production efficiency of saturated perfluoropolyether, reduces energy consumption, has a simple process, and is suitable for industrial large-scale production.

The invention discloses a method for preparing battery grade ferromanganese phosphate by using titanium dioxide by-product ferrous chloride, and relates to the technical field of production of lithium ferromanganese phosphate precursors. Comprising the following steps: removing impurities from a titanium dioxide by-product ferrous chloride crude product to obtain a ferrous chloride crude product, preparing a manganese source and a phosphorus source, and carrying out an oxidation reaction to obtain battery-grade ferromanganese phosphate, and the impurity removal comprises the following steps: dissolving the titanium dioxide by-product ferrous chloride crude product, carrying out primary filtration to obtain a filtrate, dropwise adding ammonia water while stirring until the pH value is 4, and carrying out secondary filtration to obtain the battery-grade ferromanganese phosphate. The content of the iron element is 40-55 wt%, and the content of the manganese element is 3-5 wt%. According to the method, the titanium dioxide by-product ferrous chloride crude product can be used for preparing the battery grade ferromanganese phosphate, the cyclic utilization of resources is realized, and the prepared ferromanganese phosphate is uniform in phase and high in cleanliness and is an excellent precursor for preparing a high-ferromanganese-phosphate lithium battery material.

The invention relates to bio-based tetrahydrofuran prepared by hydrogenation of bio-based succinic acid and a preparation method of the bio-based tetrahydrofuran. The method comprises the following steps: continuously feeding a bio-based succinic acid solution and hydrogen into a fixed bed containing a nickel-based catalyst, and carrying out hydrogenation reaction to obtain a crude product; the obtained crude product enters a separation tower for separation and purification, and bio-based tetrahydrofuran is obtained. The purity of the obtained bio-based tetrahydrofuran is greater than or equal to 99.99%, and the balance is impurities; the impurities are gamma-butyrolactone and 1, 4 butanediol; the content of the gamma-butyrolactone is less than or equal to 0.006%, and the content of the 1, 4-butanediol is less than or equal to 0.005%.

The invention provides a method for preparing sulfuryl fluoride chloride by an electrolytic process, which comprises the following steps: introducing sulfuryl chloride and hydrogen fluoride into an electrolytic bath, adding a conductive additive, and introducing direct current for electrolysis to obtain the sulfuryl fluoride chloride in one step, according to the method, reaction can be performed at normal temperature and normal pressure, by-product impurities such as sulfamic acid are not generated, the product purity is relatively high, and continuous production can be realized.

The invention discloses a preparation method of propargyl alcohol ether sodium propanesulfonate, which comprises the following steps: mixing propargyl alcohol, solid sodium hydroxide and methyl tert-butyl ether in a reaction container connected with a water segregator, carrying out primary heating reaction under a vacuum condition to obtain a sodium propargyl alcohol crude product, continuously dropwise adding 1, 3-propanediol into the reaction container under a normal pressure condition, and carrying out secondary heating reaction under a vacuum condition to obtain a sodium propargyl alcohol ether sodium propanesulfonate product. Adding 1, 3-propane sultone, and carrying out secondary heating reaction to obtain a propargyl alcohol ether sodium propanesulfonate crude product; and adding water to dissolve the propargyl alcohol ether sodium propanesulfonate crude product, layering, dehydrating the obtained water phase, and recrystallizing to obtain the propargyl alcohol ether sodium propanesulfonate. The methyl tert-butyl ether is utilized to carry water in vacuum, the reaction is promoted to proceed forward, the conversion rate of the sodium propargyl alcohol is improved, the reaction temperature is reduced, the yield and quality of the product sodium propargyl alcohol ether propane sulfonate are improved, amplified production is facilitated, the production cost is reduced, and the risk of the reaction process is reduced.

The invention discloses a preparation method of a silicon-carbon negative electrode material. The preparation method comprises the following steps: drying porous carbon to serve as a matrix; the method comprises the following steps: mixing a porous carbon substrate and a deposition aid, placing the mixture in a reactor together, introducing shielding gas, heating to a deposition temperature, introducing a mixture of silicon source gas and the shielding gas, and depositing silicon into porous carbon; adjusting the temperature of the reactor to a coating temperature, introducing a mixture of carbon source gas 1 and protective gas, carrying out primary carbon coating on the porous carbon, and then introducing a mixture of carbon source gas 1, carbon source gas 2 and protective gas to complete complete carbon coating on the surface of the porous carbon; and separating out the deposition aid to obtain the silicon-carbon negative electrode material. According to the invention, the problem of non-uniform silicon deposition in the process of producing the silicon-carbon negative electrode material by the existing vapor deposition method is solved, the gas-solid mass transfer is enhanced, the deposition and coating temperature is reduced, and the product quality and the production safety are improved.

The invention relates to the technical field of positive electrode precursors, in particular to a method for preparing a sulfate solution for a precursor by using a cobalt nickel hydroxide intermediate product and application of the sulfate solution. Performing acid leaching on the intermediate product, and then adding a flocculating agent to obtain a cobalt-nickel-manganese mixed solution and manganese slag; extracting the cobalt-nickel-manganese mixed solution and P507-C272, and reversely extracting a loaded organic phase to obtain a crude manganese sulfate solution; performing P204 impurity removal on the raffinate, recovering cobalt by using P507 to obtain a cobalt sulfate solution, and performing C272 nickel-magnesium separation to obtain a nickel sulfate solution; manganese slag is subjected to reduction leaching to obtain reduction leaching liquid, and then the reduction leaching liquid is mixed with a sodium carbonate solution to remove iron to obtain iron-removed liquid; mixing the iron-removed solution with the crude manganese sulfate solution, and removing calcium and magnesium to obtain a calcium-magnesium-removed solution; mixing the calcium and magnesium removed solution with an aluminum source to remove fluorine to obtain a fluorine removed solution; and mixing the fluorine-removed solution with sulfide to remove copper and zinc, adding alkali liquor to obtain a heavy-removed solution, and treating the heavy-removed solution with modified resin to obtain a refined manganese sulfate solution. The method is high in manganese recovery rate and low in treatment cost.

The invention relates to a modified hydrogen-silicon-containing modified oil polyether demulsifier and a preparation method thereof, and belongs to the technical field of oil field chemicals. The preparation method comprises the following steps: carrying out polymerization reaction on modified polyether taking an amino-modified molybdenum disulfide nanosheet as an initiator, hydrogen-containing silicone oil block polyether modified by a silane coupling agent and quaternary ammonium salt containing a furan structure under the action of ammonium persulfate and a silicon-containing reducing agent to form a high-molecular-weight inorganic hybrid polymer composite structure; the surface activity can be further improved, and the demulsification effect is enhanced. The furan ring, quaternary ammonium salt, organic silicon, block polyether and molybdenum disulfide nanosheets in the molecular structure play a role together, so that the demulsifier is easier to dissolve natural emulsifiers such as colloid, asphaltene and solid powder adsorbed on an oil-water interface, and an interfacial film formed by the natural emulsifiers is prevented from hindering water drop coalescence; and the demulsifying agent can more easily and rapidly penetrate through an emulsion external phase to be dispersed on an oil-water interface so as to play a demulsification role.

The invention discloses a method for efficiently recovering valuable metals from a waste ternary positive electrode material step by step. According to the method, the layered structure of the ternary positive electrode material is successfully destroyed through a sodium thiosulfate and glucose composite salt reduction roasting method, lithium is converted into soluble sulfate, and transition metal is converted into water-insoluble metal oxide, so that preconditions are provided for selective lithium extraction; and meanwhile, the generated metal oxide is more beneficial to subsequent roasting compared with a metal phase. According to the method, sodium thiosulfate and glucose composite salt are adopted for carbon-sulfur combined roasting, so that the reaction limit is reduced, and the reaction temperature and the reaction time are successfully reduced. And roasting can be performed in air, so that the whole process operation is facilitated. According to the method, the loss rate of lithium in the whole process can be reduced through two times of roasting and cyclic utilization of the leachate, the extremely high extraction rate of lithium is achieved, and a new thought is provided for recycling of the waste ternary positive electrode material.

The invention discloses high-yield diisobutyryl peroxide and a synthetic preparation method thereof, and belongs to the technical field of chemical synthesis. Comprising the following steps: by taking deionized water as a reaction solvent, controlling the temperature at 0-5 DEG C, and meanwhile, under the catalysis of alkali metal, performing peroxidation on isobutyryl chloride to obtain the diisobutyryl peroxide. The yield of the product diisobutyryl peroxide is higher than 90%, the problem that high reaction temperature is needed in an existing preparation method is solved, the production process is simplified, the production cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of smelting, and discloses a dedusting ash cold-pressed pellet preparation method which comprises the following steps: S1, raw material preparation: firstly preparing required converter dedusting ash or gas ash, putting the raw materials into a raw material bin for use after the raw materials are prepared, and in order to ensure the iron element in the pellet and the stability of the pellet, preparing a raw material bin; wherein the fly ash or the gas ash with the total iron content of 55% is used. The fly ash anti-calcium oxide pellet adhesive has the advantages that after the fly ash anti-calcium oxide pellet adhesive and materials are stirred with water, high adhesion can be generated, a good adhesion effect is achieved, the pellet forming rate, the wet pellet anti-falling performance and the dry pellet compressive strength are improved, and secondly, the fly ash anti-calcium oxide pellet adhesive can be recycled. The fly ash anti-calcium oxide pellet adhesive can also inhibit the pellets from disintegration and pulverization in the drying or placing process, so that the cold strength of the pellets is improved, finally, the forming rate of the pellets is high, the fly ash pellets replace scrap steel to be put into a converter and used as a cooling agent, the reaction temperature in the converter can be reduced, and the whole steelmaking process is more stable.

The invention discloses a separation method of a current collector and a positive electrode material, and relates to the technical field of waste battery recovery, and the separation method comprises the following steps: placing a positive electrode piece or a pole piece leftover material in a crusher for shearing and crushing treatment to obtain a pole piece crushed material with a certain specification size; placing the pole piece crushed material in a reaction kettle, introducing carbon dioxide with the temperature of 38-65 DEG C and the pressure of 8-25 MPa into the reaction kettle, and after the temperature and the pressure of the carbon dioxide are stable, firstly carrying out static treatment for 15-30 minutes, and then carrying out dynamic treatment for 5-15 minutes, so as to obtain a separated pole piece; in the static treatment and dynamic treatment processes, the PVDF binder in the pole piece crushed material is dissolved in carbon dioxide, so that the PVDF binder is desorbed between a current collector and a positive electrode material of the pole piece crushed material, and the current collector and the positive electrode material are easier to separate; after the reaction kettle is decompressed and cooled, discharging the separated pole piece from the bottom of the reaction kettle, and carrying out oscillation separation on the separated pole piece to obtain a current collector and a positive electrode material; the whole process is simple and efficient, and the separation effect is good.

The invention provides an encapsulated composite catalyst, the composition of the encapsulated composite catalyst is as follows: an oxide oxygen carrier (at) molecular sieve, the oxide oxygen carrier is selected from any one of CaMnO3, CaMn0. 8Cu0. 2O3, MgMn2O3, NiMn2O3, Fe2O3, Mn2O3 and Co3O4, and the molecular sieve is selected from any one of a ZSM-5 molecular sieve, a Silicate-1 molecular sieve and a Beta molecular sieve. The catalyst overcomes the problems of easy aggregation of metal ions, blockage of a pore structure, weak interaction force between metal and the molecular sieve and the like in the traditional metal molecular sieve preparation process; and the defect that the metal oxide oxygen carrier is easy to sinter and agglomerate under a high-temperature reaction condition is effectively inhibited. The invention also provides application of the encapsulated composite catalyst in preparation of low-carbon olefin by oxidative cracking of naphtha, transformation of cracking reaction from high self-heat absorption to self-heat supply is realized, process consumption is greatly reduced, the conversion rate is high, and the mass selectivity of low-carbon olefin is ensured.

The invention relates to a nickel-based catalyst as well as a preparation method and application thereof. The nickel-base-containing catalyst comprises a catalytic activity center cluster composed of nickel and a hydrophobic compound, and the size of the catalytic activity center cluster is as follows: the length is 80-150 nm, the width is 30-100 nm, and the thickness is 10-30 nm; the particle strength of the nickel-based catalyst is greater than or equal to 400N / cm. The preparation method of the nickel-based catalyst comprises the following steps: stirring and mixing asphalt and molybdenum disulfide under an oxygen condition, and carrying out heat treatment to obtain a porous carbon / molybdenum disulfide material carrier; dissolving a nickel precursor compound, a hydrophobic compound and an acid solution in water to obtain a mixed solution; dipping the obtained porous carbon / molybdenum disulfide material carrier in the obtained mixed solution to obtain a catalyst intermediate; and carrying out aging, drying and reduction treatment on the obtained catalyst intermediate to obtain the nickel-based catalyst. The nickel-based catalyst provided by the invention has high strength and high selectivity, and can be used for preparing high-purity bio-based tetrahydrofuran.

The invention discloses a preparation method of low-volatile end-epoxy modified polydimethylsiloxane, and relates to the technical field of siloxane. The technical scheme is: add silanol-terminated polydimethylsiloxane, 1-glycidyloxypropyl-7-hydroxy-1,1,3,3,5,5,7,7-octamethyltetrasiloxane, and a catalyst to a reactor, react at 70-90°C under negative pressure for 2-3h, add a terminator, and obtain low-volatile end-epoxy modified polydimethylsiloxane; the amount of catalyst is 0.0005-0.001% of the total mass of silanol-terminated polydimethylsiloxane and 1-glycidyloxypropyl-7-hydroxy-1,1,3,3,5,5,7,7-octamethyltetrasiloxane; the structural formula of low-volatile end-epoxy modified polydimethylsiloxane is as follows:. The present invention can stably prepare end-epoxy modified polydimethylsiloxane with a number average molecular weight of about 100,000, without the need for deoxidation, and at low cost.

The invention discloses an oxidation cleaning one-bath process for a polyester fabric and a polyester cellulose blended fabric, which is characterized in that process curve innovation and printing and dyeing auxiliaries are matched for oxidation, so that the reaction process time is shortened, the color fastness to washing and the color fastness to rubbing of a polyester knitted fabric are improved, and the energy consumption problem of bath change and recharging and temperature rise in a conventional process is avoided. According to the invention, a cleaning process route after conventional dyeing of the polyester fabric is innovated, a proper low-temperature activating agent is selected, and a process reaction curve is optimized, so that the dyed fabric has good dyeing color light and color fastness to washing.