22results about How to "Simple recycling process" patented technology

This invention belongs to the field of organic synthesis technology, specifically relating to a method for preparing 3-hydroxy-2-methylbenzoic acid. The method comprises the following steps: mixing 3-amino-2-methylbenzoic acid, an inorganic acid, a catalyst, and water for hydrolysis to obtain crude 3-hydroxy-2-methylbenzoic acid; extracting the crude 3-hydroxy-2-methylbenzoic acid to obtain an extract phase and a raffinate phase; and sequentially washing and concentrating the extract phase to obtain the 3-hydroxy-2-methylbenzoic acid. The method provided by this invention is simple, generates no waste, and has a relatively simple ammonium salt recovery process, making it a green and environmentally friendly synthesis process. As shown in the example data, the yield of 3-hydroxy-2-methylbenzoic acid synthesized by this invention can reach over 94%, and the purity can reach up to 98%, demonstrating good industrial value.

The invention relates to the technical field of zirconium alloy material preparation, in particular to a preparation method of a nuclear-grade zirconium or zirconium alloy cast ingot containing scrap-like residues. The method comprises the following steps: 1) identifying, classifying and collecting zirconium or zirconium alloy scrap-like residues; (2) size and surface treatment is conducted on the scraps; (3) sampling and detecting the treated scraps; (4) the total feeding amount and the scrap adding proportion are determined, the alloy element adding amount is calculated, and the qualified scrap is evenly mixed with sponge zirconium according to the proportion; 5) pressing the mixed scraps, zirconium sponge and alloy addition raw materials into electrode blocks, and welding a plurality of electrode blocks to obtain a consumable electrode for smelting; according to the method, the residual material recovery process and flow are simplified, the labor intensity and the cost are reduced, the high-quality nuclear grade cast ingot meeting the requirement is prepared, and the residual material recovery efficiency is improved.

The application discloses a recycling method of by-product cyclohexene distillation still residue, and belongs to the technical field of recycling of by-product cyclohexene distillation still residue. The still residue is analyzed by liquid chromatography-mass spectrometry, and the chlorocyclohexane in the still residue is reacted with sodium disulfide under the condition of a catalyst. After static separation, the oil phase is refined to obtain dicyclohexyl disulfide and cyclohexene, and the water phase can be recycled. The catalyst is composed of sulfonated castor oil and a phase transfer catalyst, can improve the conversion rate of chlorocyclohexane and the selectivity of dicyclohexyl disulfide, and greatly shortens the reaction time. The application can realize recycling and utilization of the still residue, avoids waste of resources and pollution to the environment, saves the chemical production cost, and meets the environmental protection concept of green chemical industry.

The invention belongs to the technical field of polyester recovery, and relates to a method for preparing BHET by catalyzing ethylene glycol alcoholysis of PET. According to the method, gamma-Fe2O3 (at) meso-SiO2-DBU is adopted as a catalyst, the gamma-Fe2O3 (at) meso-SiO2-DBU is composed of gamma-Fe2O3 (at) meso-SiO2 and DBU, the gamma-Fe2O3 (at) meso-SiO2 is of a core-shell structure, the core is gamma-Fe2O3, the shell is composed of meso-SiO2, the DBU and the shell form ion pairs through electrostatic attraction, and the ion pairs are enriched in mesopores of the meso-SiO2. The problem that the yield of BHET is low in an existing magnetic separation heterogeneous catalysis system is solved, the conversion rate of PET and the yield of BHET are effectively increased, and the catalyst is stable in structure and lasting in catalytic activity, can be magnetically separated and recycled and adapts to the strict reaction conditions for catalyzing ethylene glycol to depolymerize PET.

The invention discloses a deep-eutectic solvent, preparation thereof and application of the deep-eutectic solvent in recovery of a waste ternary lithium battery positive electrode material. The eutectic solvent is composed of ethylene glycol and lactic acid, and the molar ratio of ethylene glycol to lactic acid is 1: 10-10: 1. According to the method, a new eutectic solvent system is creatively constructed, selective leaching of the lithium element in the positive electrode material of the waste ternary lithium battery can be achieved, the coprecipitation process of key metal precursors such as nickel, cobalt and manganese is synchronously promoted, high-valued circulation and utilization of the waste ternary lithium battery are promoted, and the method is suitable for industrial production. The complex process of traditional multi-metal step-by-step separation is avoided, and the operation steps are simplified. In addition, the eutectic solvent can be recycled for more than five times, so that the battery recycling cost is reduced. The recycling method provided by the invention also greatly widens the separation and recycling ways of valuable metals in the waste batteries, and shows wide application potential and important value in the field of resource recycling.

This invention discloses a method and system for producing mesophase carbon microspheres. The method involves hydrogenating purified catalytic slurry, followed by separation to obtain light fraction, middle fraction, and tail oil. The middle fraction is divided into two streams: the first stream undergoes cracking, with the cracking products recycled; the second stream undergoes a first heat treatment, and the heat-treated product is pulverized to obtain a solid first feed stream, a first solvent, and silicone oil, which are then subjected to a second heat treatment. The resulting reaction product is then centrifuged, washed, and dried to obtain mesophase carbon microspheres. The production system includes a purification unit, a hydrogenation reaction unit, a gas-liquid separation unit, a fractionation unit, a cracking reaction unit, a first heat treatment unit, and a second heat treatment unit. This invention proposes an optimized approach to preparing mesophase carbon microsphere raw materials, yielding high-quality mesophase pitch raw materials and mesophase carbon microsphere products.

The invention discloses a decommissioned photovoltaic junction box dismantling device, and relates to the technical field of photovoltaic module recycling, the decommissioned photovoltaic junction box dismantling device comprises a frame, a conveying mechanism is fixedly arranged at the top of the frame, a first air cylinder is fixedly arranged at the top of the frame, the first air cylinder is located right above the conveying mechanism, and a movable frame is fixedly connected to the outer side of the output end of the first air cylinder; a second air cylinder is fixedly arranged at the top of the movable frame, a connecting frame is fixedly installed at the bottom of the output end of the second air cylinder, limiting rods are fixedly arranged on the two sides of the top of the connecting frame, the tops of the limiting rods slidably extend to the outer side of the movable frame, and a driving motor is fixedly arranged on the outer side of the connecting frame; the output end of the driving motor is in driving connection with a lead screw, and the outer surface of the lead screw is sleeved with a movable rod in a threaded mode. The invention effectively solves the problems of low efficiency, easy damage of parts, waste of resources and incapability of classified collection in the existing dismantling mode, and is suitable for recycling and dismantling operation of the junction box of the retired photovoltaic module.

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

The application provides a plastic woven bag recycling and reusing processing device and processing technology, and relates to the technical field of plastic recycling and regeneration. The device comprises a first support frame and a second support frame. The first support frame is provided with a feeding plate, a discharging plate, an upper and lower feeding component, a first mounting plate and a conveying component. The second support frame is provided with a second mounting plate, a transfer component and a regeneration pretreatment component for plastic woven bag regeneration pretreatment. The application completes regular material conveying by means of an automatic feeding and discharging structure, realizes material station transfer by means of a transfer assembly, stably fixes the woven bag by means of an adjustable clamping structure, and then separates impurities on the surface of the material by means of a reciprocating movable multi-group rotating treatment structure. The application can automatically complete the whole process operation of feeding, transferring, pretreating and discharging. The application can meet the processing requirements of woven bags of different specifications, can prepare qualified raw materials meeting the regeneration and granulation standards, and effectively improves the resource recycling and regeneration utilization efficiency of waste plastic woven bags.

The invention discloses a multifunctional metal material testing device, and relates to the technical field of metal material performance testing, and the multifunctional metal material testing device comprises a workbench which is used for performing a multifunctional test on a metal material; the electromagnetic three-stage separation assemblies are symmetrically arranged on the top of the workbench, through the adoption of an electromagnetic three-stage separation structure, instant fine separation of abrasive dust is achieved, a first-stage high-intensity magnetic field is responsible for efficiently capturing strong-magnetism abrasive dust, and a second-stage adjustable magnetic field is specially designed for accurately separating weak-magnetism abrasive dust; the third stage is used for collecting high-purity non-magnetic abrasive dust, in the process, the adsorption plate and the scraping plate work cooperatively, effective adsorption and smooth stripping of the magnetic abrasive dust are ensured, and the dynamic separation mechanism avoids the situation that a mixture is formed due to violent friction and collision and easy electrostatic adsorption when the abrasive dust with different attributes is mixed from the source; and the high purity and value of the recycled material are fundamentally guaranteed.

This invention discloses a sintering method for controlled migration of bismuth. By independently granulating bismuth-containing materials using a chlorine- and carbon-rich process and distributing the granules to the lower middle part of the sintering layer during sintering, a localized high-chlorine, high-reducing atmosphere micro-region can be created during sintering. This promotes the concentrated stripping of bismuth from the sintered mineral phase. Simultaneously, segmented dust collection of the sintering flue gas allows for the concentrated capture of flue gas dust during the peak bismuth volatilization phase, resulting in high-bismuth flue gas dust. The sintering method of this invention is simple, easy to control, and achieves efficient collection of bismuth, overcoming the bottleneck of dispersed and difficult-to-recover bismuth in existing technologies. It is applicable to most existing sintering production lines, requiring no additional independent production line, resulting in low overall investment costs and facilitating rapid market promotion and application.

The invention relates to the technical field of aerospace transportation, in particular to a vertical take-off and landing single-stage injection repeatable heaven and earth back-and-forth carrying method which comprises the following steps: preparing for vertical boosting launching, and simultaneously finishing all preparations before rocket launching; the vertical boosting launching device releases stored energy and boosts the rocket to accelerate; after boosting launching is completed, the rocket engine is ignited to take off and leave the boosting device; the rocket continuously accelerates to the orbit injection speed and then enters a preset orbit; the rocket is adjusted to be in a tail windward configuration needed by reentry, and the rocket is decelerated to enter a reentry window; a rocket enters the atmosphere with the tail nozzle taper plug outsole as a windward side, and the thermal protection capacity of the taper plug outsole is enhanced through a regeneration cooling structure in the taper plug outsole structure. And the rocket vertically lands to the original boosting launching rack and waits for a re-launching task at the original position. According to the invention, by constructing an integrated vertical take-off and landing, single-stage orbit injection, orbit reentry and in-situ recovery process, high-frequency, low-cost and flight-based operation of a sky-ground back-and-forth carrying task is realized.

This application pertains to the field of waste battery recycling and discloses a method, apparatus, and product for recycling positive and negative electrode materials from waste lithium-ion batteries. Specifically, it involves pre-treating waste lithium-ion batteries to obtain a mixture of positive and negative electrode materials, and then mixing the mixture with a eutectic salt to obtain a mixture to be separated. The density of the eutectic salt is 2.5 g / cm³. 3 ~3.5g / cm 3 Within a certain range; the mixture to be separated is heated to above the eutectic point of the eutectic salt, the upper solid layer is collected to obtain regenerated negative electrode material, and the lower solid layer is collected to obtain regenerated positive electrode material. This application utilizes the eutectic salt with a density between the positive and negative electrode materials, which allows the negative electrode material to float and the positive electrode material to sink, thereby effectively achieving the separation and regeneration of positive and negative electrode materials from waste lithium-ion batteries. This is beneficial for subsequent reuse and has the advantages of simple process and low cost, making it suitable for mass production.

The invention belongs to the technical field of inorganic materials, and particularly discloses a method for producing water glass and co-producing sylvite by utilizing biomass, which comprises the following steps: (a) carrying out oxygen-enriched combustion on the biomass at 650-800 DEG C; (b) mixing biomass ash obtained by combustion with water, carrying out heating pretreatment, and carrying out solid-liquid separation while the mixture is hot after the heating pretreatment is ended, so as to obtain clarified filtrate and a biomass ash filter cake; (c) mixing the biomass ash filter cake with an alkali solution, dissolving, and performing solid-liquid separation to obtain biomass ash and water glass; and (d) continuously recycling the clarified filtrate until crystals are separated out, continuously cooling and crystallizing, and carrying out solid-liquid separation to obtain the sylvite. According to the method, the directional conversion mode of the potassium element in the biomass is achieved, the potassium element is directly extracted, the treated biomass ash enters the rear end to be prepared into the water glass, synchronous production of the bio-based water glass and the high-purity potassium salt is directly achieved, the process is simple, the cost is low, and an innovative path is provided for industry green transformation.

The invention relates to a butanol waste liquid recovery method, which comprises: providing a waste liquid produced by using propylene, hydrogen and carbon monoxide as raw materials to prepare n-butanol through a carbonylation reaction, the waste liquid comprising butyraldehyde, butyric acid, n-butanol, C8 alcohol, butyl butyrate, C12 and a heavy component substance; the waste liquid is subjected to light component removal through a light component removal tower, butyraldehyde is collected at the tower top, and light component removal liquid is obtained at the tower kettle; the light component removal liquid is subjected to heavy component removal through a heavy component removal tower, heavy component removal liquid is obtained at the tower top, and C8 alcohol, C12 and heavy component substances are collected at the tower kettle; mixing the de-heavy liquid with alkali liquor for neutralization reaction, and washing the reaction liquid with water to obtain an organic phase; enabling the organic phase to pass through an n-butyl alcohol rectifying tower, collecting n-butyl alcohol at the tower top, and obtaining kettle liquid at the tower kettle; the kettle liquid passes through a butyl butyrate rectifying tower, and butyl butyrate is obtained at the tower top; carrying out hydrogenation reaction on butyl butyrate under the action of a hydrogenation catalyst, and collecting n-butyl alcohol. According to the recovery method, useful components in the waste liquid are effectively recovered.

The utility model relates to the technical field of hanging bar recovery, and discloses a steel reinforcement cage hanging bar recovery device which comprises a hoisting assembly and an adjusting assembly, the hoisting assembly is arranged below the adjusting assembly, the hoisting assembly comprises a steel reinforcement cage, two first hanging bars and a first hanging ring, the two ends of the top of the reinforcement cage are connected with first hanging bars correspondingly, the top of each first hanging bar is connected with a first hanging ring, and the first hanging rings are used for being connected with adjusting assemblies. The number of the adjusting assemblies is two, each adjusting assembly comprises a second hanging bar, a shackle piece and a buckle piece, one end of the second hanging bar is connected with the shackle piece, the other end of the second hanging bar is connected with the buckle piece, and the buckle piece is used for adjusting the length of the second hanging bar in the vertical direction. And the bottom of the second hanging bar in the vertical direction penetrates through the first hanging ring to be connected with the hoisting assembly. Through the arrangement of the buckling piece and the unbuckling piece, the length of the hanging bar can be adjusted, and the hanging bar can be recycled.

The utility model provides a photovoltaic waste acid liquid treatment system which comprises a reaction kettle, a filter, an evaporator, a fractionating tower and a condenser which are connected in sequence, the reaction kettle comprises a feeding opening and a liquid discharging opening; the filter is connected with the liquid outlet; the evaporator is connected with the filter and is used for evaporating the filtered solution to obtain mixed steam and evaporated residual liquid; the fractionating tower is connected with the upper part of the evaporator and is used for fractionating the mixed steam to obtain concentrated hydrofluoric acid and wastewater; and the wastewater is condensed by the condenser and then is sent to sewage treatment equipment. According to the system, photovoltaic waste acid is recycled into mixed acid containing hydrofluoric acid, the recycling process is simple, the recycled acid can be reused for an original photovoltaic etching production line and can also be used for etching treatment of ultrathin display screens, and the market capacity is large.

The application discloses a method for recycling and utilizing waste lithium battery electrolyte resources, and comprises the following steps: freezing and cutting the waste lithium battery, and then putting the waste lithium battery into an organic solvent for leaching; performing solid-liquid separation to obtain first filtrate and first filter residue; performing distillation on the first filtrate to obtain mother liquor and organic distillate; adding a complexing solvent into the mother liquor for reaction, and then performing filtration to obtain second filtrate and second filter residue; heating the second filter residue to obtain lithium hexafluorophosphate solid; adding an amine compound into the second filtrate, and then performing filtration to obtain third filter residue; and heating the third filter residue to obtain lithium bisfluorosulfonylimide solid. The method realizes extraction and recovery of lithium hexafluorophosphate and carbonate solvents in the electrolyte, and can extract pure lithium bisfluorosulfonylimide from lithium hexafluorophosphate crystallization mother liquor.

The utility model discloses a lathe for machining with solid-liquid separation and waste collection functions, which relates to the technical field of lathes and comprises a lathe body, a machining frame is fixedly arranged in the middle of the top end of the lathe body, a scraper is slidably arranged at the top of the lathe body, a discharge groove is formed in the top of one side of the lathe body, and the discharge groove is communicated with the machining frame. A collecting box is arranged on one side of the lathe body, a filtering box is arranged on the top of the interior of the collecting box in a sliding mode, a lifting assembly is arranged on one side of the filtering box, a support is fixedly arranged on the top of the other side of the lathe body, and a moving assembly for moving a scraping plate is arranged in the support. The device has the advantages that solid-liquid separation of waste materials is achieved, complexity of follow-up treatment of the waste materials is remarkably reduced, cutting fluid does not need to be removed through an additional process in the metal scrap recycling process, the recycling process is simplified, and resource consumption and recycling cost are greatly reduced.

The application discloses a drum stirring type low-temperature plasma activated carbon particle regeneration device, which comprises a stirring tank, an input unit, a stirring unit and a low-temperature plasma degradation unit.The axis of the stirring tank is horizontally arranged, and an input port and an output port are arranged at two ends of the stirring tank respectively.The output end of the input unit is communicated with the input port of the stirring tank, and the input unit is used for inputting waste activated carbon into the stirring tank.The stirring unit is arranged in the stirring tank.The low-temperature plasma degradation unit is arranged at the central position of the stirring unit, and the discharge electrode is in a cylindrical structure.The gas inlet of the waste gas treatment unit is communicated with the output port of the stirring tank.The waste activated carbon regeneration process is combined with the low-temperature plasma, the organic pollutants in the waste gas generated in the waste activated carbon regeneration process are synchronously degraded, the energy utilization rate is high, the secondary pollution is small, and the subsequent waste gas treatment difficulty is low.

The application discloses a treatment method for oil-containing copper scrap oil removal and oxidation prevention, and belongs to the technical field of resource treatment of oil-containing metal solid waste, and comprises the following steps: mixing the oil-containing copper scrap and an organic solvent at 180-200 DEG C and under inert atmosphere to obtain a solvent-copper scrap mixed solution, wherein the organic solvent used can generate reducing hydrogen in the mixing process; and distilling the solvent-copper scrap mixed solution under the conditions of inert atmosphere and a vacuum degree of less than or equal to 10 kPa to obtain solid copper scrap. The treatment method utilizes the full effect of the organic solvent on the copper-oil interface under heating and inert pressurized atmosphere, passivates fatty acids and pyrolysis intermediates, so that the oil-containing copper scrap containing synthetic oil can be efficiently deoiled, and the oxidation of the copper scrap can be inhibited.