188 results about "Electronic waste" patented technology

The invention discloses a photovoltaic waste silicon and recycled carbon composite granulation coating process, and relates to the field of new energy materials. According to the method, high-purity silicon waste sheets recovered from retired photovoltaic modules and carbon materials recovered from electronic wastes are subjected to composite granulation, and a carbon coating layer is formed through heat treatment. The preparation method specifically comprises the steps of raw material pretreatment, mixing, granulation forming, coating carbonization, post-treatment and the like, the prepared silicon-carbon composite particles have good conductivity and structural stability and can be used for lithium ion battery negative electrode materials, and efficient recycling of resources and environment-friendly production are achieved.

The invention relates to the technical field of image recognition, in particular to an intelligent solid waste recognition system based on multi-modal fusion, which comprises a data acquisition module, a visual guidance module, a recognition module and a cooperative processing module, and is characterized in that the system quickly analyzes surface information such as visible light images, three-dimensional point clouds and infrared spectrums of materials through the visual guidance module; and coding to generate a dynamic vector for guiding a subsequent refined analysis task. The identification module constructs a two-dimensional pixel map on the internal density map according to the guidance of the dynamic vectors, and utilizes a map neural network to deeply analyze local density textures so as to identify high-value components such as an internal circuit board; and the co-processing module performs template matching of the internal components and external surface anomaly detection according to the instruction so as to assess the security risk. According to the method, the external form and internal structure information of the material are deeply fused through the strategy of coarse first, fine second and dynamic guidance, and intelligent recognition of the complex electronic waste is achieved.

The invention belongs to the technical field of material chemistry, and particularly relates to a method for synthesizing an amide hydrogen bond organic framework material based on a one-pot method and gold recovery application. The preparation method comprises the following steps: dissolving a dihydroxybenzidine monomer in a formic acid monomer under 15-minute ultrasonic treatment, then adding ethylene glycol, and then carrying out ultrasonic treatment on the mixture for 5 minutes; then placing the sample bottle in a drying oven at 30 DEG C for constant-temperature evaporation so as to separate out brown blocky crystals; and filtering and collecting crystals, washing with water for multiple times, and carrying out vacuum drying at 60 DEG C to obtain the final material HOF-D. The HOF-D synthesized by the method disclosed by the invention can be used for rapidly recovering Au (III) from an aqueous solution with high selectivity, cycling stability and large capacity (5186 + / -10 mg. G <-1 >), so that the efficient adsorption and recovery of Au (III) in electronic waste liquid are realized, and the HOF-D has a good application prospect.

The invention discloses an electronic waste efficient chlorination comprehensive recovery device and method, and relates to the technical field of chemical metallurgy, the electronic waste efficient chlorination comprehensive recovery device comprises a chlorination reaction cavity, a heating system, a vacuum system, an atmosphere control system and a condensation separation system; the heating system is used for controlling the temperature of the chlorination reaction cavity; the vacuum system is communicated with the heating system; the atmosphere control system comprises a chlorine gas source and a protective gas source; and the temperature of the condensation separation system is gradually reduced. Through the high-purity graphite heating assembly, the sealing structure and the atmosphere control system, the highest heating temperature is 1700 DEG C, the temperature limit of 1200 DEG C of a traditional quartz tube furnace can be broken through, the chlorine corrosion problem is solved, chlorine is not leaked, and the environment is not polluted. High-valued recovery of different metal resources can be achieved through low-temperature pyrolysis, high-temperature chlorination volatilization and three-stage condensation settling separation, and the method has the advantages of being low in energy consumption, high in recovery rate, environmentally friendly and the like and is suitable for industrial metal resource recovery.

The invention aims to provide a method for preparing micron-sized zinc metastannate by wet recovery of tin and zinc in electronic wastes and a synthetic method of 4-hydroxy-1-indanone, and belongs to the technical field of metal recycling. According to the method, amino coordination and carboxylic acid chelation are utilized, tin and zinc in the electronic waste are selectively leached out under the mild acidic condition, impurity metals such as iron and copper are retained in residues due to the difference of complexing constants, and metal ion grade separation (selectivity gt and 99%) is achieved. And then, through evaporation-crystallization regulation and control, the Sn-Zn complex is directionally reconstructed into micron-sized zinc metastannate. In indanone synthesis, micron-sized zinc metastannate forms a local protonic acid environment by adsorbing trace moisture in a reaction system, synchronously activates a C = N bond (Lewis acid site catalysis) of an imine substrate and stabilizes a cyclization transition state (hydrogen bond guiding effect), so that the activation energy of [4 + 1] cycloaddition reaction is reduced, reaction equilibrium is driven to move towards a product end, and the yield of indanone is increased. And quantitative conversion of indanone under mild conditions (the yield is 60%) is realized.

The invention belongs to the technical field of preparation of adsorption separation functional materials, and discloses a controllable preparation method and application of an S-COFs nanosheet adsorbent. According to the method, 2, 5-dimethyl sulfide terephthalaldehyde DMTTPA and 1, 3, 5-tris (4-aminophenyl) benzene TAPB are taken as monomers, cyanobenzene is taken as a reaction solvent, benzoic acid is taken as a catalyst, aniline is taken as a competitor, and the high-crystallinity S-COF adsorbent is controllably prepared under the condition of high temperature by accurately regulating and controlling crystallization time and combining a dialysis purification technology. The method not only realizes controllable morphology, but also greatly improves the adsorption performance. The method has important economic value in the field of precious metal recovery, the problems of precious metal resource waste and environmental pollution in electronic waste can be effectively solved, and meanwhile, a new thought is provided for designing a low-cost high-performance adsorbent.

The invention provides a preparation process of a plain conductive cloth single-sided adhesive tape, which belongs to the technical field of chemistry, and comprises the following steps: preparing a conductive adhesive; preprocessing the plain conductive cloth; a coating process; performing segmented drying; curing and forming; pressing and slitting are carried out; corn starch is used as a raw material, a three-dimensional network structure adhesive is constructed through a gradient oxidation cross-linking modification technology, a conductive-bonding interface is optimized in cooperation with conductive carbon black and a silane coupling agent, finally, the adhesive is compounded with metallized polyester cotton plain conductive cloth, the high-performance adhesive tape is prepared, carbon emission in the production process is reduced, and the production cost is reduced. And the waste adhesive tape can be biodegraded by 90% in a natural environment, so that the problem of pollution caused by the persistent adhesive in the electronic waste is fundamentally relieved, and an innovative solution is provided for green electronic manufacturing.

The utility model provides electronic waste double-rotor hammer type fine crushing equipment which comprises a crushing main machine, the crushing main machine comprises a base, and a left upper cover and a right upper cover are hinged to the two sides of the top of the base through upper cover pin shafts respectively; a feeding hole is formed in the top of the base and is positioned between the left upper cover and the right upper cover; bearing seats are arranged on the two sides of the base in pairs, crushing rotors are rotationally mounted between the bearing seats, and the two groups of crushing rotors are correspondingly connected with the output ends of the two motors respectively and provide crushing power; an arc-shaped crushing cavity structure used for being matched with the crushing rotor is arranged in the base, and a discharging opening is formed in the position, located below the arc-shaped crushing cavity structure, of the bottom end of the base. The crushing equipment can realize fine separation of copper etching lines and resin on a circuit board in electronic wastes, so that high-efficiency screening of precious metals and resin can be realized subsequently.

An electronic waste (E-waste) recycling process and composite article or material using the E-waste. E-waste, for example including printed circuit boards (PCBs) and / or electronic components (ECs) such as integrated circuit chips, is size reduced, processed with one or more chemicals to remove base metals, precious metals, and chemicals of concern, and dried to provide a E-waste powder. The E-waste powder, may be used to form an E-waste composite article or material.

The invention discloses a dissociation method for an out-of-service photovoltaic module, which belongs to the technical field of resourceful treatment of electronic wastes and comprises the following steps of: treating the out-of-service photovoltaic module by adopting a deep eutectic solvent; the eutectic solvent is a mixture of an alcohol hydrogen bond donor and an organic acid hydrogen bond acceptor in a molar ratio of 1: 1; according to the method, efficient separation of the glass, the silicon wafer battery and the back plate can be achieved, the purity of the product is extremely high, the purity of the glass can reach 99.95%, and the back plate keeps the original property and can be directly recycled. The whole process is environment-friendly, green and pollution-free, the separated eutectic solvent can be further recycled, the recovery rate is high, and resources are fully utilized.

The application provides an amino acid composite reagent system and a method for treating electronic waste to prepare high-purity glycine copper, and belongs to the technical field of metal hydrometallurgy and resource recycling. The application builds an ammonia catalytic reduction mechanism by designing an amino acid composite reagent system, greatly improves the leaching rate, simultaneously inhibits the dual effects of copper hydroxide precipitation and glycine chelation, and realizes efficient solution of copper ions; through narrow window regulation technology of pH at 9.5±0.2, the stability of ammonia, the activity of glycine anion are maintained, and the selective leaching rate of copper is ensured; a directional crystallization process of leaching solution is constructed, the "self-assembly directional crystallization" process of glycine copper chelate is used, based on the saturation concentration of glycine copper in the leaching solution and the stable chelate structure, through three-stage crystallization precise regulation, the preparation of high-purity crystal is realized. The process realizes the closed-loop crystallization system of "zero addition of crystal seeds and zero wastewater discharge" of the copper-containing complex leaching solution of electronic waste.

The invention relates to a method and a system for producing an oxidant solution, comprising an electrochemical cell having an anode and a cathode, the method comprising the steps of: (i) supplying a raw electrolyte to a reaction region between the anode and the cathode, the raw electrolyte consisting of sulfate ions (SO42-) and ferrous ions (Fe2 +); (ii) during a run cycle, electrolyzing the feedstock electrolyte to produce an oxidized acid solution comprising peroxydisulfate (S2O8 < 2->) and iron ions (Fe < 3 + >); and (iii) supplying the oxidized acid solution. The oxidant solution is preferably used to leach metals from wastes including electronic wastes and metal-containing ores.

The utility model discloses a kind of LED instrument fusion TFT instrument structure, it is related to instrument structure technical field, including instrument shell, the front end surface of the instrument shell is provided with digital middle plate, the surface of the digital middle plate is provided with static indication mark, the middle position of the digital middle plate is equipped with TFT screen card slot, the middle position of the TFT screen card slot is installed with TFT high-resolution dynamic screen.Reduce electronic waste: modular design makes instrument assembly can be independently replaced or upgraded (such as only replacing TFT screen instead of whole equipment), substantially reduce the whole machine scrappage rate caused by local fault, prolong product life cycle, reduce electronic garbage generation.Resource efficient use: standardized interface and split structure simplify production process, reduce material redundancy.For example, LED and TFT module can be produced separately in batches, reduce energy consumption and raw material waste, in line with the concept of circular economy.

The invention discloses a method for electrochemical gradient extraction of gold and copper in electronic waste, which comprises the following steps: taking a mixed solution composed of sulfuric acid and copper sulfate as a first electrolyte, taking the electronic waste as an anode, carrying out a first electrolytic reaction, then taking out the degolded electronic waste, and carrying out solid-liquid separation and drying on an anode chamber solution to obtain the gold and copper in the electronic waste. Gold foil is obtained; and taking a mixed solution consisting of sodium chloride, sulfuric acid, copper sulfate and diethylenetriamine pentaacetic acid as a second electrolyte, adding the degolded electronic waste into the anode chamber, carrying out a second electrolytic reaction, then collecting sediments in the cathode chamber, and passivating, cleaning and drying to obtain the copper foil. According to the method, gold in the electronic waste is directly extracted through an electrochemical method, copper is continuously extracted through a slurry electrolysis method, the process of extracting gold and copper from the electronic waste is shortened, the recovery rate of obtained gold and copper is high, and the purity of copper is high; the used medicament is simple, easy to treat and good in environmental benefit.

The present application relates to the technical field of sustainable product environmental performance monitoring, and discloses a multi-category product whole life cycle environmental monitoring self-adaptive loading fixing device, which is composed of a split detachable main frame, a multi-modal self-adaptive loading fixing module, a mechanical loading density monitoring module and a mechanical vibration feedback module. The main frame adopts a split plug-in structure, and the loading module includes four types of adaptive loading groups, which can be flexibly assembled to adapt to multi-category products relying on the opposite sliding structure, the height adjusting structure and the locking structure, without the need for customized tooling. The device is designed with pure mechanical and non-electricity, is suitable for non-electricity scenes and does not produce electronic waste. The mechanical vibration feedback module is carried to realize real-time early warning of excessive transportation vibration and greatly reduce product loss. The whole device is free of fragile electronic components, effectively solves the problems of poor adaptability of traditional devices, difficulty in collecting environmental performance data, lagging stability feedback and difficulty in maintenance, and meets the needs of sustainable product evaluation and green logistics.

The invention discloses an ultrasonic-assisted photocatalytic precious metal leaching method, and belongs to the technical field of precious metal recovery. The method comprises the following steps: (1) material pretreatment: treating electronic waste powder containing gold, silver and copper into electronic waste powder capable of being leached by a proper method; (2) preparing a reaction system: adding electronic waste powder containing gold, silver and copper into a leaching solvent, then sequentially adding FeCl3 and a photocatalyst, and uniformly stirring; (3) photocatalytic leaching: carrying out ultrasonic-assisted leaching reaction on the suspension reaction system under ultraviolet irradiation; and (4) solid-liquid separation is conducted, and leaching liquid containing precious metal and leaching residues are obtained. According to the method, the synergistic effect of FeCl3 and the photocatalyst is combined, efficient leaching of precious metal is achieved under ultraviolet irradiation, and the method has the advantages of being environmentally friendly, efficient, good in cyclicity, mild in condition, easy to operate and the like, is suitable for large-scale recovery of precious metal from electronic waste containing gold, silver and copper and has important economic and environmental significance.

The utility model discloses an electronic technology waste product smashing device, and belongs to the field of smashing equipment, the electronic technology waste product smashing device comprises a shell, a feeding port is fixedly connected to the upper portion of the shell, a discharging port is fixedly connected to the lower portion of the shell, a smashing assembly is arranged on the inner surface of the shell, the smashing assembly comprises a supporting seat, and the supporting seat is fixedly connected with the rear portion of the shell; a motor is fixedly connected to the lower portion of the supporting seat, a first rotating shaft is fixedly connected to the output end of the motor through a coupler, the first rotating shaft penetrates through and is rotationally connected with the rear portion of the shell, a second rotating shaft penetrates through and is rotationally connected with the rear portion of the shell, and the front ends of the first rotating shaft and the second rotating shaft are rotationally connected with the inner surface of the shell. According to the electronic waste crushing device, the crushing assembly is arranged to crush the electronic waste, the crushing assembly can crush the electronic waste firstly and then grind the electronic waste into powder, and the effect of conveniently and efficiently crushing the electronic waste is achieved.

The invention provides photosensitive resin, an anti-dazzle film, a preparation method of the anti-dazzle film and a degradation method of the anti-dazzle film, and relates to photosensitive resin in the field of display and optical film materials. The photosensitive resin is prepared by reaction of raw materials including a urethane acrylate oligomer, an aziridine compound and an acrylic monomer, and the molecular structure of the photosensitive resin has a beta-amino ester bond and an ultraviolet-curable acrylate group. The degradable photosensitive resin is provided by introducing beta-amino ester bonds into the photosensitive resin, so that the anti-dazzle film prepared from the coating composition containing the photosensitive resin can be quickly hydrolyzed and degraded under a mild hydrothermal condition, the problem of pollution of a polymer coating in electronic waste is fundamentally solved, and the anti-dazzle film has the advantages of high anti-dazzle performance and the like. And the environmental problem caused by the method can be effectively relieved.

The application discloses a kind of polydopamine / polyimide dioxime composite membranes for gold recovery and preparation method thereof.The method comprises the following steps: preparing polyimide dioxime solution;Polyimide dioxime solution is added to N,N-dimethylformamide solution to obtain a mixture, then trimethylolammonium solution is added to the mixture, and dopamine is added to the above obtained mixture, and the polydopamine / polyimide dioxime composite membrane can be obtained by standing in air for 24 h.The application also discloses the application of the composite membrane prepared by the method in the recovery of gold in electronic waste.The application obtains an independent self-supporting composite membrane by a simple interfacial polymerization method.The operation is simple, ecological and safe, and easy to mass production and industrial production.The composite membrane in the application can efficiently, quickly and selectively recover gold in electronic waste, improve the utilization rate of scarce resources, and provide a new idea for the design and preparation of subsequent related actual electronic waste adsorbent.

This invention provides a thiourea-tertiary amine bifunctional chitosan microsphere and its preparation method, belonging to the field of adsorption material technology. Through a stepwise functionalization and sequential crosslinking method, thiourea groups are first introduced onto the chitosan microspheres, followed by the introduction of tertiary amine groups and secondary crosslinking, successfully preparing chitosan microspheres possessing both thiourea and tertiary amine bifunctional groups. The thiourea and tertiary amine groups in the microspheres of this invention exhibit a synergistic adsorption effect on noble metal chloride anions, significantly improving the selective adsorption capacity and adsorption rate for noble metals such as palladium, platinum, and rhodium. Simultaneously, the dense three-dimensional network structure constructed through stepwise crosslinking greatly enhances the chemical stability and mechanical strength of the microspheres under strongly acidic environments, extending their service life. This preparation method is simple, mild, and environmentally friendly. The prepared adsorbent is particularly suitable for the efficient and selective recovery of noble metals from complex acidic wastewater or electronic waste leachates.

This invention discloses the application of human exposure fingerprinting of electronic waste pollution in exposure risk prediction. The human exposure fingerprinting consists of three or more of the following exposure markers: 2,4,6-tribromophenol, 2,4,5-trichlorophenol, 4-bromophenol, 1-hydroxypyrene, and bisphenol A. This invention is the first to employ the systematic method of urinary contaminant exposure profiling to achieve comprehensive screening and characterization of contaminant exposure markers related to specific components and byproducts in workers exposed to electronic waste. This is currently the most systematic organic contaminant exposure study known in this field.

The invention discloses a method for preparing a ceramic frit from electronic waste. The ceramic frit is prepared from the following raw materials in parts by mass: 40-55 parts of waste electronic glass, 15-27 parts of polishing powder, 8-10 parts of waste aluminum oxide, 6-8 parts of waste desulfurized gypsum, 3-6 parts of a boron-containing modifier, 5-8 parts of waste fuel and 1-3 parts of a mineralizing agent. The method comprises the following steps: stirring and mixing waste electronic glass, polishing powder, waste aluminum oxide, waste desulfurized gypsum, a boron-containing modifier and a mineralizer, adding waste fuel, further stirring and mixing, and then feeding into a granulator for granulation; feeding the prepared particles into a smelting furnace for calcining, wherein the calcining temperature is 1050-1150 DEG C; and carrying out water quenching molding on the molten material to obtain the ceramic frit. The method for preparing the ceramic frit from the electronic waste solves the technical problems of high energy consumption of ceramic frit calcination and resource waste caused by direct treatment of the electronic waste in the prior art.

This utility model discloses a compression device for waste processing, relating to the technical field of waste processing equipment. The device includes a body with a hydraulic plate inside. The lower end of the inner wall of the body is trapezoidal. A rapid demolding unit for demolding electronic waste is installed inside the body. A support plate in the rapid demolding unit is slidably connected inside a groove, supporting the electronic waste. A fixing clip is located on one side of the support plate, securing it when it stops moving. By incorporating the rapid demolding unit and utilizing the sliding of the support plate and the cooperation of the fixing clip, this device can quickly and conveniently demold electronic waste, improving demolding efficiency. The trapezoidal design of the lower end of the inner wall facilitates smooth demolding of the formed waste, reducing damage and ensuring waste quality, which is beneficial for subsequent recycling.

The present invention discloses a flame-retardant and toughened polylactic acid composite material with a low dielectric constant and a preparation method thereof. The flame-retardant and toughened polylactic acid composite material has a "sea-island" two-phase condensed state structure with polylactic acid as the "sea" and a flame-retardant and toughening agent encapsulating nano-silica as the "island". The raw materials are composed of the following in parts by mass: 60-100 parts of polylactic acid, 10-40 parts of a flame-retardant and toughening agent, 5-25 parts of nano-silica, and 0.1-1 part of a cross-linking agent. The polylactic acid composite material of the present invention has a low dielectric constant and flame-retardant properties. At the same time, its impact strength and elongation at break are also improved compared with pure polylactic acid. Polylactic acid itself is derived from natural substances and can be biodegradable. The polylactic acid composite material of the present invention is applicable to the electronics and electrical industries, and can solve problems such as current electronic waste pollution and shortage of petrochemical resources.

This application provides a method for extracting gold resources from urban minerals based on TEMPO electrocatalysis-histidine gold leaching reagent system, which belongs to the technical field of precious metal recycling. This method utilizes the original copper / iron impurities in discarded printed circuit boards to construct a Cu 2+ / Fe 3+ TEMPO redox coupled synergistic catalytic system. 2+ (E°=0.34 V vs SHE) and Fe 3+ (E°=0.77 V) with TEMPO + (E°=0.75 V) forms a step-by-step electron transport chain. TEMPO is precisely controlled by electric field + The electron transfer efficiency of the TEMPO redox couple (E° = 0.75 V vs. SHE) significantly increases the gold dissolution rate while reducing energy consumption and achieving a low impurity co-dissolution rate, enabling efficient and selective recovery of gold resources from electronic waste. This invention, through the TEMPO electrocatalytic-histidine chelation synergistic system, achieves efficient and selective extraction of gold from urban minerals, fundamentally addressing the key challenges of traditional cyanide-free gold extraction processes, such as high oxidant consumption, poor selectivity, and low efficiency.

The invention provides an amino acid composite reagent system and a method for preparing high-purity copper glycinate by treating electronic waste through the amino acid composite reagent system, and belongs to the technical field of metal hydrometallurgy and resource regeneration. According to the method, an amino acid composite agent system is designed, an ammonia catalysis barrier reduction mechanism is constructed, the leaching rate is greatly increased, the double effects of copper hydroxide precipitation and glycine chelation are synchronously inhibited, and efficient dissolution of copper ions is achieved; the ammonia stability and the glycine anion activity are maintained through a narrow window regulation and control technology with the pH value being 9.5 + / -0.2, and the copper selective leaching rate is guaranteed; the method comprises the following steps: constructing a leaching solution directional crystallization process, and preparing a high-purity crystal by utilizing a self-assembly directional crystallization process of a copper glycinate chelate based on the saturation concentration of copper glycinate in the leaching solution and a stable chelation structure through precise regulation and control of three-stage crystallization. According to the process, a closed-loop crystallization system of'zero seed crystal addition and zero wastewater discharge 'of the copper-containing complex leaching solution of the electronic waste is realized.

An apparatus for destroying electronic data and enabling selective material recovery is provided. A first stage shreds electronic waste into particles no greater than 20 mm by 20 mm. A second stage separates metal from non-metal using a belt-driven magnetic separator in which a continuous belt carries the particles across a magnet assembly; metal is removed to a first bin. A third stage shears the remaining non-metal to particles no greater than 2 mm by 2 mm, which pass a screen into a second bin. In certain embodiments, a vibratory feed ramp meters flow to the belt separator, and dust collection may be provided by a vacuum system and, optionally, a cyclone separator coupled by gasketed clamps.

The invention discloses a device for recovering metallic tin from tin-containing waste liquid of electronic waste, which comprises an electrolysis assembly and further comprises a pole piece mounting assembly mounted on one side of the electrolysis assembly, and a cleaning assembly mounted on the other side of the pole piece mounting assembly; the adjusting structure detects the weight of the cathode piece, the weight of the cathode piece reaches the standard, the adjusting structure starts to drive the cathode piece to be separated from the electrolysis assembly, the cathode piece is separated from the electrolysis assembly while the adjusting structure lifts the cathode piece, and power is cut off; a first resistance plate and a second resistance plate in the cleaning assembly clamp and heat the cathode piece, and the heated cathode piece causes surface tin to melt and drop. According to the method, the accumulation amount of tin on the surface of the cathode plate is monitored in real time through the weight sensor, when the detection value reaches the preset threshold value, tin removal is triggered, and by means of the scheme, the negative effect on the chemical reaction efficiency of an electrolytic tank due to the too thick tin layer can be effectively avoided.

The invention relates to the technical field of gold recovery, in particular to a pyridine-porphyrin-based porous organic polymer as well as a preparation method and application thereof. The pyridine-porphyrin-based porous organic polymer Pyd-PPOPs-Br is reasonably designed and synthesized by integrating a pyridine site with positive charges and a porphyrin part into a framework. When the Pyd-PPOPs-Br is used as an Au (III) recovery adsorbent, the Pyd-PPOPs-Br shows excellent performance, and the obvious adsorption capacity of 3.787 g / g is achieved. In a practical application experiment, the Pyd-PPOPs-Br selectively recovers more than 90% of gold from the electronic waste leachate.