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66results about How to "Good for recycling" patented technology

Method for recovering copper from acidic copper-containing etching solution and preparing cuprous oxide

The invention discloses a method for recovering copper from an acidic copper-containing etching solution and preparing cuprous oxide. The method comprises the following steps of: S1, filtering the acidic copper-containing etching solution to obtain a crude copper-containing solution; S2, adjusting the pH of the crude copper-containing solution to 2-4, adding an extractant, mixing and stirring, standing for layering, wherein the upper layer is a primary copper-containing organic phase, and the lower layer is a primary water phase; recovering the primary water phase for an etching production line; S3, washing the copper-containing organic phase with deionized water, and separating to obtain a secondary copper-containing organic phase and a primary washing water phase; S4, adding sulfuric acid into the secondary copper-containing organic phase, fully stirring, standing for layering, wherein the upper layer is an extractant-containing organic phase, and the lower layer is a CuSO 4-containing water phase; S5, adding the primary washing water phase into the extractant-containing organic phase, washing, standing for layering to obtain a pure extractant organic phase for use in the step S2; and S6, preparing cuprous oxide from the CuSO 4-containing water phase by a hydrothermal method or a chemical precipitation method.
Owner:SICHUAN UNIV

Circuit board recovery method

The invention provides a circuit board recovery method, and relates to the technical field of circuit board recovery. The method comprises the steps of crushing circuit boards so as to obtain first crushing materials, and extracting ferromagnetic materials from the first crushing materials by utilizing a magnet, wherein the particle size of the first crushing materials is not larger than the firstsize; crushing the first crushing materials so as to obtain second crushing materials, and extracting ferromagnetic materials from the second crushing materials by utilizing the magnet, wherein the particle size of the second crushing materials is not larger than the second size; extracting particles of which the density is larger than the preset density with particles of which the air separationdensity is less than the preset density and particles of which the density is larger than the preset density; jigging and separating the particles of which the density is less than the preset density, and separating metal particles and first surplus materials from the particles of which the density is less than the preset density; and heating the first surplus materials to the preset temperatureso as to obtain gas, liquid and second surplus materials, and recovering the gas and the liquid. According to the circuit board recovery method disclosed by the invention, the waste of resources and environmental pollution can be avoided.
Owner:CHINA ENFI ENGINEERING CORPORATION

Method for extracting potassium chloride from sintering dust in iron and steel enterprises

The invention discloses a method for extracting potassium chloride from sintering dust in iron and steel enterprises. The method comprises the following steps: fully stirring a leaching solution and sintering dust under normal temperature and normal pressure conditions for 0.5-1 hour, conveying the formed slurry to a mechanical filter pressing unit after completion of leaching, performing solid-liquid separation on the slurry through the mechanical filter pressing unit, drying the leaching residues, returning to a sintering process, leaching the leaching solution again, allowing the leaching solution to enter a membrane process impurity removal unit, conveying the leaching solution to a quartz sand filter through a pump, filtering to remove particles in the liquid, performing micro-filtration treatment, and removing colloid in the liquid; finally, realizing separation of multivalent metallic impurities and potassium through nanofiltration, so as to obtain a refined potassium-containing pregnant solution, allowing the refined potassium-containing pregnant solution to enter a membrane distillation and crystallization unit, concentrating the potassium-containing pregnant solution by utilizing a low-temperature heat source of the iron and steel enterprises, cooling, so as to obtain a potassium chloride crystal. The method disclosed by the invention is simple in process, high in degree of automation and low in energy consumption, wastewater emission is avoided, and comprehensive utilization of harmful solid wastes in the iron and steel enterprises is realized.
Owner:WUHAN GREAT SEA HI TECH

Preparation method and application of corncob biomass carbon dot composite Bi2WO6 photocatalyst based on magnetic Fe3O4 modification

The invention belongs to the technical field of chemical preparation of environmental materials, and particularly relates to a preparation method and application of a corncob biomass carbon dot composite Bi2WO6 photocatalyst based on magnetic Fe3O4 modification. The method comprises the following steps: step 1, treating a corncob precursor; step 2, preparing biomass carbon dots (CDs); step 3, preparing Bi2WO6; step 4, preparing Fe3O4; step 5, preparing CDs/Bi2WO6; and step 6, adding the CDs/Bi2WO6 obtained in the step 5 into the Fe3O4 nanosphere precursor solution obtained in the step 4, conducting heating in a polytetrafluoroethylene reaction kettle, washing the obtained product with ethanol and deionized water, and conducting drying for later use. The magnetic Fe3O4 modified corncob biomass carbon dot composite Bi2WO6 photocatalyst prepared by the method is used for photocatalytic degradation of tetracycline. The corncobs are applied to preparation of biomass carbon dots, so that waste is turned into wealth; and Fe3O4 is used as a composite material to prepare the composite photocatalyst, so that the catalyst can be recycled and reused, and the waste of resources is avoided. Thephotocatalyst has excellent photocatalytic activity and stability.
Owner:TONGHUA NORMAL UNIV

Production system and method of glass products

The invention discloses a production system of glass products, and belongs to the technical field of glass apparatuses. The production system of the glass products disclosed by the invention comprises a synchronous motion mechanism, wherein the synchronous motion mechanism is provided with a telescopic blowing head clamp; the blowing head clamp is provided with a machine head component; the blowing head clamp and the machine head component are connected to a pneumatic system; a feeding chamber, a firing chamber, a film blowing chamber, a cracking-off chamber and a destroy chamber, which are sequentially connected with one another are arranged below the synchronous motion mechanism; a feeding pipe is arranged in the feeding chamber; a combustion furnace is arranged in the firing chamber; a film blowing mechanism is arranged in the film blowing chamber; a cracking-off mechanism and a support clamp are arranged in the cracking-off chamber; and a crushing mechanism is arranged in the destroy chamber. According to the production system of the glass products disclosed by the invention, the technical problems of different specification parameters and the like of glass products caused by manual operation are mainly solved; the overall production process of the glass products can be fully automatically finished; and the specifications and the dimensions of the produced glass products are almost consistent.
Owner:四川元通玻璃仪器有限公司

Sweet potato seedling culture greenhouse having water storage function

The invention discloses a sweet potato seedling culture greenhouse having a water storage function. The sweet potato seedling culture greenhouse comprises a greenhouse body, a planting platform, a first greenhouse roof and thermostats, a cross beam is fixed at the top end inside the greenhouse body, one end of the top of the cross beam is hinged to the first greenhouse roof while the other end ofthe same is hinged to a second greenhouse roof, a solar cell panel is arranged at the top end of each of the second greenhouse roof and the first greenhouse roof, a temperature sensor is fixed at thebottom end of one side inside the greenhouse body, and a control panel is fixed at the bottom end of one side of the greenhouse body. By mounting the planting platform, planting grooves, a soil humidity sensor, water leaking holes, a water storage tank, a filter net, the control panel, a spraying device, a water diversion pipe, a water pump and nozzles, the soil humidity sensor senses soil moisture condition and transmits signals to a single chip microcomputer in the control panel, then the single chip microcomputer controls the nozzle to spray water, so that automatic water replenishing is facilitated when seedling culture soil lacks of water, artificial regular watering is not needed, and time and labor are saved.
Owner:常州华德文化创意有限公司
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