1689results about How to "No generation" patented technology

The invention discloses an alginate-base organic-inorganic composite hydrogel filtering membrane, which is designed and prepared aiming at the problems of low mechanical strength, high probability of deformation, low flux and the like of a pure ionic cross-linked hydrogel filtering membrane. According to the filtering membrane, sodium alginate is used as a membrane forming substrate, micro-nano inorganic particles are used as a reinforcing agent and a pore-enlarging agent, and the composite hydrogel membrane which is obtained after cross-linking of a cross-linking agent and elution of a pore-forming agent has better stability and mechanical performance than the pure ionic cross-linked alginate hydrogel membrane. The mechanical strength and the pore size of the membrane are adjusted by changing the type, the particle diameter size and the added amount of the micro-nano inorganic particles and the type and the concentration of the ionic cross-linking agent. The composite hydrogel filtering membrane is prepared through a simple preparation process and is low in cost; no organic waste liquid is produced; the obtained hydrogel flat membrane can resist the pressure of 0.1-0.6 MPa; the alginate hydrogel is dissolved after being subjected to soaking treatment of a sodium citrate solution; expensive micro-nano inorganic particles can be recovered through simple precipitation separation.

The present invention provides one kind of inorganic insulating adhesive for soft magnetic metal powder core. The inorganic insulating adhesive consists of SiO2, Al2O3, ZrO2, mica powder and water mixed together, and possesses both insulating and adhering functions. The present invention also provides the method of using the inorganic insulating adhesive in preparing soft magnetic metal powder core. Using the inorganic insulating adhesive can result in high magnetic performance of the magnetic metal powder core and enhanced mechanical strength, and the soft magnetic powder core without organic matter contained has no ageing and performance degradation caused by heat.

The invention discloses a composite phase-change energy storage material for microcapsules and a preparation method thereof. The coating of the microcapsule is made of silicon dioxide, and the core of the microcapsule is made of a phase-change energy storage material, wherein the phase-change energy storage material is a paraffin organic solid-liquid phase-change energy storage material. 0.2 to 0.5 wt.% of dispersed emulsifier, 52.5 to 62.5 wt.% of solvent water, 18.75 to 31.5 wt.% of phase-change energy storage material and 15.5 to 18.75 wt.% of inorganic silica source are matched and put into a reactor for stirring for 5 to 8 hours; the mixture is uniformly dispersed and emulsified at the temperature 3 to 8 DEG C higher than that for solid-liquid phase change; hydrochloric acid aqueous solution catalyst with the pH value of 0.93 to 4.07 or sodium hydroxide aqueous solution catalyst with the pH value of 8.0 to 12.0 is added into the emulsion; the reacting solution is naturally cooled to room temperature and precipitation solution is obtained; the precipitate is washed with the combination of water and petroleum ether, wherein the mass percent of the petroleum ether is 30 wt.%; then the precipitate is washed with deionized water and is filtered, and the product is naturally aired. The invention improves the technology of phase-change energy storage and conservation, and has the function of automatic temperature regulation, favorable physical and chemical stability, crack resistance, flame retardancy, wear resistance and high thermal conductivity.

The invention discloses a multifunctional concrete structure endurance protective agent as well as the preparation and application method thereof. The protective agent provided by the invention contains the following ingredients of: an organic / inorganic composite fluorosilicone-acrylate copolymer, lithium silicate, sodium silicate, lithium molybdate, sodium tetraborate, sal glauberi, 1,2-aminoazophenylene, nanometer titanium dioxide, anhydrous ethanol and water. The protective agent can penetrate inside concrete, wherein a densification ingredient can minimize internal holes and cracks to raise the compactness of concrete, and a rust-resistant ingredient can penetrate into concrete and be adsorbed on the surface of steel bar so as to passivate and protect the steel bar; the low-surface energy silicon fluoride ingredient can be solidified to form a cured film on the surface of concrete so as to endow the protective agent with the hydrophobic performance; a nanometer ingredient can endow the cured film layer with properties of resisting ultraviolet and ageing and improving the organic polymer performance as well as the self-cleaning performance. In addition, hydroxy generated from the hydrolysis of siloxane group can perform a condensation reaction with hydroxy on the surface of concrete to produce chemical bond, so as to raise the anchoring strength between the film and concrete and improve the interface combination. The protective agent provided by the invention can be widely applied in various concrete structure engineering protections to raise the service life of concrete.

The invention provides a method for cutting a transparent material by using ultra-short pulse laser. The ultra-short pulse laser output by an ultra-short pulse laser generating device is condensed by a condensation device so as to form a bunching laser beam; the bunching laser beam enters from the surface of the transparent material to be machined, so that the center refractive index at a laser application point is increased to form a waveguide structure along a laser emitting direction; the laser is transmitted to the inside of the transparent material along the waveguide structure, and continuously generates a waveguide structure along the laser emitting direction in a transmission process until the entire waveguide structure and the laser penetrate through the transparent material; and therefore, the laser moves in a direction which is vertical to the surface of the transparent material at uniform speed, so that a waveguide plane is formed in the transparent material. The invention further provides a device for cutting the transparent material by using the ultra-short pulse laser. The method and the device for cutting the transparent material by using the ultra-short pulse laser provided by the invention have the advantages of fast cutting speed, small cutting seam, no material consumption and no powder pollution. When the machined material bears a suitable external force, the material is cracked only along a stress fault surface; the broken surface nearly has no conical degree; and the roughness is good.

The invention discloses a chemical and ionic cross-linked alginate hydrogel flat membrane for filtration, which is designed and prepared aiming at the problems of poor stability, low mechanical strength, overlarge pores and the like of a pure ionic cross-linked hydrogel filtering membrane. According to the flat membrane, sodium alginate is used as a membrane forming substrate, a water-soluble compound is used as a pore-forming agent, and a chemical cross-linking agent and an ionic cross-linking agent are added, so that the sodium alginate is subjected to covalent bonding and ionic cross-linking to improve the stability of the membrane. The mechanical strength and the pore size of the membrane and the stability in an electrolyte solution are adjusted by changing the types and the proportions of the chemical cross-linking agent and the ionic cross-linking agent. The hydrogel flat membrane is prepared through a simple preparation process and is low in cost; no organic waste liquid is produced; the obtained hydrogel membrane can resist the pressure of 0.2-1 MPa and has a good application prospect in the separation field in which membrane pollution is easy to produce, such as oil-water separation, protein separation and biological sample filtration. The hydrogel flat membrane is directly discarded and can be fully degraded by microorganisms after being used, so that no environmental harm is caused.

The invention discloses a method for preparing ternary hydroxide from nickel, cobalt and manganese in waste lithium ion batteries recovered by a liquid phase method, belonging to the technical field of metallurgical recovery of valuable metals, and solves the increasingly prominent problem of recycling waste lithium ion batteries. question. The invention uses waste lithium ion batteries as raw materials, and the main production steps include: dismantling and crushing, pulping, leaching, copper removal by extraction, iron and aluminum removal by precipitation, and preparation of nickel-cobalt-manganese ternary hydroxide. In the invention, the whole battery is crushed and then processed, no harmful gas is generated in the whole process of recovery and preparation, and green recovery is realized from the root. Raw material requirements, the entire production process is more convenient to operate, and the product is more pure, suitable for industrialization.

Provided are a vehicle having high degree of operation freedom due to electric power being able to be supplied to the vehicle during its travel and due to the vehicle being able to drive on normal roads, and a traffic system. A large number of overhead lines are arranged over a road. An extendable electric power collector is provided at the rear of the vehicle, and a battery and a drive mechanism are mounted on the vehicle. When the power collector is in contact with an overhead line, electric power supplied from the overhead line is supplied to the battery to charge it and electric power is supplied also to the drive mechanism. When the vehicle travel on a normal road having no such overhead lines, electric power is supplied from the battery to the drive mechanism.

The invention discloses a calcination process of active lime. The calcination process adopts a preheating-suspension calcination device comprising a multi-stage cyclone preheating system, a decomposing furnace and a multi-stage cyclone cooler. The calcination process is characterized in that limestone powder which is broken and homogenized into blocks is ground into fine powder, the fine powder is placed in a storage tank for homogenization, then preheated by the multi-stage cyclone preheating system and sent to the decomposing furnace for calcination, thereby preparing the active lime, and the active lime is further cooled by the multi-stage cyclone cooler for obtaining the active lime; wherein the main control temperature of the decomposing furnace is 850-950 DEG C; and the calcination time is 3-5 seconds. The calcination process utilizes the preheating-suspension calcination reaction method for calcining the active lime, and fuel can use low-grade fuel-biluminous coal. Compared with the traditional process, the calcination time is short, the effective utilization rate of the lime product is high, the product quality is stable, the energy consumption is low, and a production region has no environmental pollution; meanwhile, the calcined active lime is the fine powder, the use is very convenient, and the range of applications is broader in comparison with the active lime calcined by the traditional process, thereby being conductive to promotion and implementation.

The invention discloses a novel and large-scale preparation method of nano-cuprous oxide. The method comprises the steps of: fully dissolving copper salt and an organic protective agent in a dissolvent; gradually warming to 20-70 DEG C; adding a reducing agent into a reaction system after the temperature is stabilized; reacting for 20-30min by continuously stirring; gradually cooling; standing the cooled solution and centrifuging; and repeatedly washing by alcohol, deionized water and acetone sequentially in sequence to obtain stable cuprous oxide. The method is simple in technology, simple in operation, moderate in reaction, short in reaction time, and high in efficiency, thereby being suitable for large-scale production; the product is good in performance, the grain size of the nano-cuprous oxide is less than 20nm, and the product has good secondary dispersibility in various oil agents; the method is low in preparation cost, low in energy consumption, and free of the generation of harmful wastes, and meets the modern production requirement of 'green protection, environment protection and energy saving'.

The invention provides a high temperature resistant Gemini cationic viscoelastic surfactant (VES) and a synthetic method thereof, relating to the field of oil recovery technology and engineering in the petroleum industry. The synthetic method is characterized by reacting unsaturated long-chain fatty acid with N,N-dimethyl propanediamine to synthesize a fatty acid amide intermediate; reacting methylamine with epichlorohydrin to synthesize a chloramine intermediate; reacting the intermediates synthesized in the two above steps respectively to synthesize the high temperature resistant Gemini cationic VES. The VES and the synthetic method have the beneficial effects that a high temperature surface active diverting acid system reacts with rocks at 160 DEG C, so that the liquid obviously diverts to become viscous and is subjected to automatic gel breaking under the condition that the hydrochloric acid concentration is below 5%, thus achieving rapid flowback; the VES has good temperature resistance, is relatively low in price and is beneficial for popularization and application.

A catalyst carrying ionic liquid and metallic nanoparticles for preparing high-quality arylamine by hydrocatalyzing aromatic nitro compound is prepared through preparing immobilized ionic liquid by bonding the ionic liquid onto carrier, binding it with the active component containing transition metal or precursor, and reductive exchange. Its advantages are low reaction temp, long service life and no waste generation.

The invention discloses a method for preparing GAMMA-valerolactone from levulinic acid and formic acid, which is characterized in that the levulinic acid is in situ reduced at 100-200 DEG C in the presence of ruthenium catalyst and formic acid contained in a system as reducer, and distillation is carried out to obtain mixture containing the product GAMMA valerolactone and used catalyst; and mother liquor containing the used catalyst and raw material are mixed to realize circulation of the catalyst, thereby greatly improving environmental friendliness. The method avoids the energy source consumption during valerolactone purification process, avoids hydrogen source acquired from the system exterior, and improves the economy and security of a production system, with the advantages of simple operation process. The formic acid is decomposed to generate large amount of carbon dioxide besides hydrogen, which is convenient for collection and utilization.

The invention belongs to the nanometer material technical field, in particular to a nano-copper conductive ink preparation method, comprising the following steps: dissolving copper salt and organic protective agents in a solvent, heating the solution to 30-100 DEG C, simultaneously adding reducing agent in the reaction system to react while stirring for 20-30min, then cooling gradually; finally obtaining stable nano-copper conductive ink through electrodialysis separation and reduced pressure distillation. The invention has simple process, mild reaction conditions and short reaction time; the conductibility of the product is good, the particle size of nano-copper is 20-70nm, the nano-copper can not be oxidized for one month in the air; the production cost is low and no hazardous waste can be generated, thus meeting the demand of 'green production'.

The invention discloses a lithium-sulfur battery cathode material, a preparation method, and a lithium-sulfur battery, and belongs to the technical field of lithium-sulfur battery materials. The lithium-sulfur battery cathode material is a carbon-sulfur composite material, which is coated by a carbon cladding layer with a micro-porous structure. In the preparation method, under a vacuum condition, the raw materials are heated, just in one step, the sulfur and the carbon matrix are uniformly combined, the carbon precursor is carbonized, and the coating on the carbon-sulfur composite material is achieved. Compared with the conventional low-temperature coating method, the carbon cladding layer, which is carbonized at a high temperature and has a micro-porous structure, can form interactions just like the chemical bonds with the carbon-sulfur composite material; so that the micro-porous carbon cladding layer and the carbon-sulfur composite material are tightly combined together, thus the sulfur and discharge products cannot be easily dissolved in the electrolyte, the shuttling effect is prevented, the utilization rate of sulfur is improved, at the same time, the conductivity of the cathode material is better improved, and the cycle stability and capacity retention rate of the lithium-sulfur battery are both improved.

The invention provides an all solid waste filling material for stabilizing dioxin incineration fly ash and a preparation method thereof, and belongs to the technical field of solid waste utilization. The filling material comprises a cementing agent and an aggregate, and the cementing agent comprises ore slag, steel slag, industrial by-product gypsum, waste incineration fly ash and the like, and the aggregate comprises mountain sand, river sand, tailing sand or waste rocks and the like. The cementing agent is activated, and evenly mixed in a mixer, according to the weight ratio of cementing agent to aggregate of 1 / 1 to 1 / 10, 0% to 1% of a water reducing agent is added, the mass fraction of slurry is 65%-82%, and the qualified filling material can be obtained by even stirring. The cementing filling material for mines is prepared from the all solid waste system, meanwhile the dioxin-containing waste incineration fly ash can be stabilized, and the environmental problems caused by the waste incineration fly ash dioxin and a large amount of lands required for waste landfill can be solved.

The invention belongs to the field of soil improvement, and specifically relates to a method for restoring organophosphorus pesticide contaminated soil. The method comprises the two phases of conditioning and stacking-decomposing, and chemical oxidation, wherein the phase of conditioning and stacking-decomposing comprises the following steps: 1) adding a strong-base medicament; 2) adding surfactant aqueous solution into soil prepared in the step 1); and 3) hermetically stacking the soil in the step 2) for 2-7 days; and the phase of chemical oxidation comprises the following steps: 4) adding a strong oxidant into the soil obtained in the phase of conditioning and stacking-decomposing; 5) preparing a strong acid into aqueous solution and adding the aqueous solution into the soil in the step 4), and rapidly stirring simultaneously to enable the soil to be weak-acidic finally; and 6) hermetically stacking the soil subjected to the adequate stirring treatment in the step 5), keeping the humidity of the soil and maintaining for 1-3 days. The restoration process of combining conditioning and stacking-decomposing with chemical oxidation, which is disclosed by the invention, is more stable and thorough compared with the method of restoring organic contaminated soil through simply and directly adopting chemical oxidation.

Production of nanometer high-purity silicon dioxide in high-frequency plasma gas-phase oxidizing reactor is carried out by purifying air of oxygen and feeding it into high-frequency plasma generator, generating plasma oxygen at oscillating power 30KW and frequency 3í½4MHz, gasifying SiCl4 at 200í½300íÒC and delivering it plasma chemical reactor, reacting it with oxygen plasma at 1200í½1800íÒC, keeping the reactant in reactor for 0.15í½1s, removing scar with mol ratio of SiCl4 and oxygen: 1:1.2í½2, inducing dried air or N2 gas, quenching silicon dioxide crystal below 300íÒC, collecting powder, removing chlorine, and obtaining nanometer high-purity silicon dioxide. It achieves good dispersity, high output and simple process.

The invention relates to a method for preparing phosphatidylserine abundant in polyunsaturated fatty acid and belongs to the technical field of bioengineering. The method is characterized by comprising the following steps of: firstly, catalyzing ester exchange reaction between phosphatide and polyunsaturated fatty acid ester by utilizing one or a mixture of phosphatidase A and lipase to generate phosphatide abundant in polyunsaturated fatty acid; and then catalyzing phosphor-transfer esterification reaction between the phosphatide abundant in the polyunsaturated fatty acid and L-serine by utilizing phosphatidase D to generate the phosphatidylserine abundant in the polyunsaturated fatty acid. The method has the advantages of no discharge of waste water, good product quality, no solvent residue, safe process operation, few reaction byproducts, no waste generation, cost reduction, simple production process and easy realization of scale production because of utilizing two enzymes to perform sub-step catalysis and perform reaction in the same reactor, and completing the reaction process in a non-solvent system. Therefore, the invention provides a good and feasible method for preparing the phosphatidylserine abundant in the polyunsaturated fatty acid.

The invention provides a manufacturing method of graphene foam. The manufacturing method comprises the following steps of: 1) reducing an aqueous dispersion of graphene oxide through a hydrothermal method, and performing self-assembly on graphene sheets to obtain a graphene wet gel block body; 2) freezing the graphene wet gel block body obtained in the step 1) on a metal tray, wherein the metal tray has preset freezing temperature which is controlled within a range of -196 DEG C to -10 DEG C, and the graphene wet gel block body after freezing is completely crystallized to form a gel crystalline solid; and 3) performing vacuum sublimation and drying on the gel crystalline solid obtained in the step 2). The manufacturing method has the advantages of simple process and capability of regulating and controlling a hole structure of the graphene foam, thus the graphene foam has different properties.

The invention belongs to the technical field of nano, in particular to an original ecology separation and redispersion method of a nano metallic colloid. By taking spherical nano silver as an example, the method comprises the following steps: stirring and reacting silver salts under the existence of an organic protective agent and a reducing agent to obtain a nano silver colloid; adjusting the pH value of the nano silver colloid with acid, and continuously stirring and reacting until the colloid solution gradually appears flocks to obtain nano silver particles; and dispersing the nano silver particles in an organic solvent, and dispersing by ultrasonic to obtain the nano silver colloid dispersed in an original ecology mode. The invention can realize original ecology separation and redispersion repeatedly based on the interactive relationship among a dispersing agent, nano particles and the solution. The invention has the advantages of simple process, mild operation condition, short reaction time, little changes in particle size and appearance after repeated separation and dispersion, low preparation cost and no generation of harmful waste, and conforms to the requirement of green production.

The invention belongs to the nanometer material technical field, in particular to a preparation method of nano-copper, comprising the following steps: dissolving copper salt and organic protective agents in a solvent, heating the solution to 30-100 DEG C, simultaneously adding reducing agent in the reaction system to react while stirring for 20-30min, then cooling gradually; standing the cooled solution, and then centrifuging and finally washing the solution with ethanol and acetone repeatedly to obtain pure nano-copper. The invention has simple process, mild reaction conditions and short reaction time; in the reaction process, two protective agents are both adopted to prevent the growth and oxidation of nano-copper; the product performance is good, the particle size of nano-copper is less than 20nm, the nano-copper can not be oxidized for one month in the air; the production cost is low and no hazardous waste can be generated, thus meeting the demand of 'green production'.

The invention relates to a new method for preparing rare earth chloride by using Baiyunebo rare earth concentrate and belongs to the field of wet-process metallurgy. The invention comprises the following steps: performing thermal decomposition, wherein a raw material used is Baiyunebo mixed rare earth concentrate with a grade of 60 to 80 percent; leaching in hydrochloric acid, namely leaching oreobtained after thermal decomposition in hydrochloric acid; performing alkaline decomposition, namely decomposing filter residue obtained after leaching in hydrochloric acid with solution of sodium hydroxide; washing, namely washing the ores obtained after alkaline decomposition with water till the pH value is 7 to 9, and recovering fluorine and phosphorus from washing solution; performing primaryneutralization, namely mixing hydrochloric acid leachate and water washing residue, and neutralizing till the pH value is 0.5 to 2.5; and performing secondary neutralization, namely neutralizing the filtrate obtained by the primary neutralization till the pH value is 4 to 5, wherein the filtrate of the secondary neutralization is solution of rare earth chloride. The method has the advantages of facilitating recovery of other elements, avoiding waste gas, waste water and waste residue, along with small alkali consumption, stable process and high rare earth recovery rate of more than or equal to 95 percent.

The process of enriching noble metal from copper sulfate nickel ore with low grade noble metal content includes the successive steps of: 1. smelting copper sulfate nickel ore at 1200-1300 deg.c and converter blowing to obtain metallized nickel matte melt; 2. cooling metallized nickel matte melt, crushing, milling and magnetically separating to obtain Ni-Cu alloy; 3. smelting the Ni-Cu alloy, and water quenching the melt to obtain alloy grain; and 4. hydroxydizing the alloy grain with CO gas to produce gaseous carbonyl nickel, decomposing the gaseous carbonyl nickel in a ecomposer to obtain carbonyl nickel powder product, and feeding the noble metal residue to noble metal extracting process. The technological process of the present invention is short, low in cost, environment friendly and high in noble metal recovering rate.

The present invention relates to a preparation method of high-purity aluminium oxide powder body. It is characterized by that it adopts aluminium sheet whose purity is 99.9999% and organic alkal; and makes them be mutually reacted in hot water bath to obtain the precipitate of aluminium hydroxide, then the precipitate is calcined at 1100-1200deg.C and ground so as to obtain high-purity ultrafine aluminium oxide powder body. The described organic alkal; includes any one of choline, hexamethohydrotetramine and dopamine.

The invention discloses a preparation method of an aza-carbon-coated cobalt catalyst. The preparation method comprises the following steps of uniformly mixing a carbon source, a nitrogen source, a cobalt salt and a solvent according to a mass ratio of x to (6-x) to (1 to 6) to (1 to 10), wherein x is an integer of 0 to 6; drying an obtained mixture, and roasting the mixture in a vacuum tubular furnace in inert gas; acidifying the roasted mixture in diluted acid, separating solid and liquid, and washing and drying the solid, so as to obtain the aza-carbon-coated cobalt catalyst. The invention also discloses a method using the catalyst prepared by the method for the catalytic transfer hydrogenation of unsaturated compounds, especially vanilline, benzaldehyde, cinnamyl aldehyde or quinoline. The preparation method has the advantages that the preparation method is simple, the cost of the raw materials is low, and the obtaining is easy; cobalt is coated into aza-carbon, so that while the high activity is maintained, the acid-resistant property and anti-CO (carbon monoxide) toxicity property of the catalyst are improved; formic acid is used as a hydrogen source to replace high-pressure hydrogen in a catalytic reduction reaction of the unsaturated compounds, the environment-friendly and economic effects are realized, the selectivity of a target product is high, and the generation of byproducts is avoided.

The invention discloses a device and a method for treating antibiotic wastewater by utilizing low temperature plasma in coordination with a bismuth molybdate catalyst. The device for treating the antibiotic wastewater by utilizing the low temperature plasma in coordination with the bismuth molybdate catalyst comprises a barrel-shaped reactor, a breather pipe, a high voltage electrode, an alternating current high voltage power supply, an air pump and a stirrer, wherein the breather pipe is arranged inside the barrel-shaped reactor and is coaxial with the barrel-shaped reactor, the high voltage electrode is suspended inside the breather pipe, the lower port of the breather pipe is arranged at the lower bottom part inside the barrel-shaped reactor, the upper part of the breather pipe is arranged outside the barrel-shaped reactor, an air inlet is formed in the side wall of the upper part of the breather pipe, the air inlet is communicated with the outlet of the air pump by virtue of a pipeline; the alternating current high voltage power supply is respectively connected to the high voltage electrode and grounded, and the stirrer is arranged at the lower part of the barrel-shaped reactor. The device for treating the antibiotic wastewater by utilizing the low temperature plasma in coordination with the bismuth molybdate catalyst has the characteristics of simple design, low equipment investment and no secondary pollution and can be applied to the filed of treatment on antibiotic wastewater and organic wastewater difficult to be biochemically degraded, wherein a degradation reaction temperature can be increased by fully utilizing heat produced in a discharge process.

The invention relates to a method for producing an automotive sound-insulating pad. The method for producing the automotive sound-insulating pad comprises the following steps of: a, laying a raw material, namely laying a thermoplastic felt material on the network chain of an oven; b, baking and softening, namely feeding the thermoplastic felt material into the oven through the network chain of the oven for baking and softening, wherein the temperature of an upper heating zone in the oven is between 230 and 250 DEG C, the temperature of a lower heating zone is between 310 and 330 DEG C, and the baking time is 255 to 285 s; c, performing compression molding, namely performing compression and cooling on the baked and softened thermoplastic felt material to be a semi-finished product, wherein during the compression and cooling molding, the molding pressure is 16 to 17 MPa, the molding time is 90 to 110 s, and the cooling temperature is between 20 and 30 DEG C; d, performing water jet cutting, namely positioning the semi-finished product subjected to the compression cooling, and performing water jet cutting to obtain the required sound-insulating pad, wherein the cutting water pressure is 40,000 to 50,000 psi, and the cutting air pressure is 0.6 to 0.8 MPa; and e, inspecting, namely inspecting the sound-insulating pad, and packing and warehousing. The method for producing the automotive sound-insulating pad is simplified, energy-saving and environment-friendly, the automotive sound-insulating pad has high strength, the production efficiency of the method is high, and the method can reduce labor intensity.

The invention relates to a technology for high-efficiently recycling soldering tin of discarded printed circuit boards, and a device. In a sealed system, in which liquid heat conducting medium exists, discarded printed circuit boards to be processed and welded with electronic parts are put in a swivel which is provided with a plurality of filtering holes and immersed in the heat conducting medium, the temperature is risen until the soldering tin is melted, after the temperature is constant, the swivel is rotated to centrifugally separate solid and liquid, the soldering tin leaks from the filtering holes, deposits at the bottom and is cooled into ingot, and the electronic parts are separated from the discarded printed circuit boards correspondingly. The method for recycling the soldering tin of discarded printed circuit boards has no environmental pollution, low energy consumption and high efficiency, and can create good condition for high-efficiently recycling other metals.