47results about How to "Less corrosive" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The invention relates to an environment-friendly process method for improving the surface metal cleaning efficiency of a silicon wafer, and belongs to the technical field of semiconductor silicon wafer processing, and the process method comprises the following operation steps: S1, pre-cleaning and activation: placing the silicon wafer in a first cleaning tank, introducing ozone into ultrapure water, and processing in cooperation with low-frequency ultrasound; and S2, main cleaning and complexing: placing the silicon wafer subjected to pre-cleaning and activating treatment in a second cleaning tank, and treating the silicon wafer in a dilute citric acid solution in cooperation with high-frequency ultrasound. And S3, overflow rinsing: placing the silicon wafer subjected to main cleaning and complexing treatment in a third cleaning tank. And S4, drying: carrying out drying treatment on the silicon wafer subjected to the overflow rinsing treatment. Through the synergistic effect of physical stripping, chemical oxidation and complexing dissolution, under the condition that highly toxic chemicals such as hydrofluoric acid are not used, the cleanliness of metal on the surface of the silicon wafer reaches the ppt level, and the problems that traditional RCA cleaning is serious in environmental pollution and high in operation risk are effectively solved.

The invention discloses a method for preparing phenyl acetate with high selectivity. A phosphoric acid solution is added into a magnesium chloride solution, stirring and heating are performed to obtain a suspension, the suspension is dried to constant weight to obtain a white solid, the white solid is ground to obtain powder, and the powder is calcined to obtain the catalyst. Then mixing phenol and a catalyst, placing the mixture in an oil bath for reflux reaction, dropwise adding acetic anhydride, distilling after the reaction is finished, and collecting a fraction at 190-195 DEG C, namely phenyl acetate. According to the magnesium chloride loaded phosphoric acid type catalyst (MgCl2-H3PO4) prepared by the method disclosed by the invention, phenol and acetic anhydride react without a solvent, MgCl2-H3PO4 is a solid catalyst, can be recycled only by filtering and can be repeatedly used after being washed, and MgCl2-H3PO4 also improves the selectivity of phenyl acetate and reduces the production cost.

The invention relates to the technical field of disinfectants, in particular to a high-stability composite peracetic acid disinfectant and a preparation process thereof, and the high-stability composite peracetic acid disinfectant comprises the following components in percentage by mass: 4-6% of peracetic acid, 10-15% of hydrogen peroxide, 15.0-25% of acetic acid, 0.1-0.3% of terpolymer and the balance of water. The stability of PAA and HO is improved, and the decomposition of PAA and HO in the storage process is reduced, so that the durability of the sterilization efficiency of the disinfectant is ensured.

This invention discloses a cleaning method, cleaning system, and application for precision filters. The cleaning method includes the following steps: coarsely washing the emptied precision filter with an organic solvent; washing the coarsely washed precision filter with water to remove the organic solvent; after washing, draining the wash water from the precision filter to fill it with water, then heating to perform deep hydrolysis treatment on the gel impurities adhering to the precision filter; after the deep hydrolysis treatment is completed, draining the decomposition liquid from the precision filter; washing with water, and drying to complete the cleaning of the precision filter. This invention's cleaning method uses water for deep decomposition treatment to replace the existing alkaline washing process, achieving efficient decomposition of GPAN, with good cleaning effect, low solid waste generation, and low corrosivity. This invention further improves the water-based deep decomposition treatment process, proposing a reflux self-circulation deep decomposition treatment process and a forced circulation deep decomposition treatment process to further improve the cleaning effect.

The application discloses a preparation method of aluminum dialkyl hypophosphite with different alkyl groups, and comprises the following steps: (1) dispersing aluminum hypophosphite solid in a low concentration in a solvent system containing alkali metal hydroxide and water, the mass ratio of the aluminum hypophosphite solid to water being 1:20-1000; under the initiation of a free radical initiator, making olefin 1 and the aluminum hypophosphite solid to have an addition reaction at 100-150 DEG C and 0.1-0.3 MPa, and controlling the consumption of the olefin 1 to be sufficient for the reaction of the aluminum hypophosphite solid, so as to prepare an aluminum monoalkyl hypophosphite solution, filtering the precipitate, and collecting the filtrate; (2) continuously feeding olefin 2 different from the olefin 1 into the filtrate, and making the aluminum monoalkyl hypophosphite and the olefin 2 to have an addition reaction under the initiation of the free radical initiator at 100-150 DEG C and 0.1-0.3 MPa, so as to obtain aluminum dialkyl hypophosphite with different alkyl groups. The purity of the aluminum dialkyl hypophosphite with different alkyl groups prepared by the application is above 99.5%.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

The invention discloses a low-corrosion ternary nitric acid molten salt heat storage material and a preparation method and application thereof.The method comprises the steps that sodium nitrate powder, potassium nitrate powder and sodium nitrite powder are weighed according to the ratio of K < + > to Na < + > being 1: 1.0-1: 1.5 and the ratio of NO3 <-> to NO2 <-> being 1: 1-1.5: 1 and mixed to obtain a ternary nitric acid molten salt mixture, a silicate additive is added, the mixture is evenly mixed and dried, and a ternary nitric acid molten salt phase preform is obtained; and after fully melting and stirring, cooling and crushing to obtain the low-corrosion ternary nitric acid molten salt. The prepared low-corrosion ternary nitric acid molten salt is small in corrosion, low in melting point, high in decomposition temperature and good in heat stability, and can be used as a heat storage material for solar thermal power generation and other related heat storage fields.

The invention belongs to the field of mosquito prevention and killing, and particularly relates to a technology for killing mosquitoes by using a safe and non-toxic alkaline which does not contain pyrethroids and phosphorus. The preparation method comprises the following steps: mixing water, glycol stearate, tetrasodium glutamate diacetate, sodium hydroxide, fatty alcohol-polyoxyethylene ether and polydimethylsiloxane to obtain a mixed aqueous solution, standing, and filtering to obtain a final aqueous solution of the mosquito killer. Strict tests prove that the non-pyrethroid alkaline mosquito killer has a very high killing effect on static and flying mosquitoes by spraying an aqueous solution through a spraying can, is environment-friendly, particularly has no pollution to air when being used in a closed space, and is an ideal non-pyrethroid alkaline mosquito killer. The pyrethroid mosquitocide has a good killing effect on various mosquitoes, and another mosquito killing method except the pyrethroid mosquitocide is provided.

This invention provides a method and equipment for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte, relating to the field of metal material recycling. The method for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte includes the following steps: S1, the waste aluminum electrolyte is crushed, ground, sieved, and then dried for later use. The method provided by this invention utilizes ultrasonic-assisted leaching of lithium-containing waste aluminum electrolyte with organic acid (malonic acid). Compared with traditional inorganic acid leaching, organic acid has advantages such as good biodegradability, weak acidity, low corrosiveness, recyclability, and environmental friendliness. During neutralization, cryolite byproducts are obtained, which can be returned to the aluminum electrolysis cell for reuse, realizing the recycling of fluorine and aluminum. Finally, high-purity lithium phosphate is obtained through precipitation, effectively utilizing the lithium resources in the waste aluminum electrolyte.

The invention belongs to the technical field of catalysts, and particularly relates to a cobalt-manganese composite metal oxide catalyst and a preparation method and application thereof. A water mixed solution of a cobalt source, a manganese source, ammonium fluoride and a precipitant is subjected to a hydrothermal reaction, a reaction product is washed, dried and calcined, and the required cobalt-manganese composite metal oxide catalyst is obtained. The catalyst is used for catalyzing acrylic acid and 2-[(tetrahydrofurfuryl) oxy] ethanol to synthesize ethoxylated tetrahydrofurfuryl alcohol acrylate. The catalyst is good in catalytic activity, narrow in product composition distribution, high in selectivity and small in byproduct generation amount, and further has the advantages of being easy and convenient to separate and recycle, high in repeated utilization rate, low in corrosion to equipment, free of requirements for equipment materials, environmentally friendly, high in stability and the like.

The invention belongs to the technical field of liquid lead-based cooling test systems, and particularly relates to a cleaning device and method for deposited impurities of a lead cooling system. An inlet of a sludge circulating cleaning pump is connected with a filter, and the other end of the filter is connected with a bottom pipeline of a lead cooling system; the outlet of the sludge circulating cleaning pump is connected with the inlet of the heater; the outlet of the heater is connected with the inlet of the pressure-stabilizing container; an outlet of the pressure stabilizing container is connected with a top pipeline of the lead cooling system to form a cleaning circulation loop; the upper end of the pressure stabilizing container is connected with the top liquid filling tank through a liquid inlet pipeline, the top liquid filling tank is connected with the waste gas treatment unit through an exhaust pipe, the bottom liquid discharging pipe is connected with the waste liquid storage pool, and the negative pressure sucking pump is connected with the waste gas treatment unit. The cleaning device can safely and efficiently remove stubborn deposited impurities on the inner wall and the dead zone of the lead cooling system, corrosion to structural steel in the cleaning process is reduced to the maximum extent, waste liquid and waste gas generated in the cleaning process are effectively collected and treated, and secondary pollution is prevented.

This invention discloses a synthesis process for methylal, belonging to the field of methylal technology, comprising the following steps: In a reactor, formaldehyde and methanol are reacted at a molar ratio of 1:1.5-4.5 under the action of an organic-inorganic composite solid acid catalyst at 50-75°C for 40-240 min, with the reflux ratio controlled at 1-4:1, and the fraction collected at 40-46°C from the top of the column to obtain industrial-grade methylal product; the organic-inorganic composite solid acid catalyst is phosphotungstic acid supported on multi-component mesoporous microspheres grafted with sulfonic acid-based acrylamide. The methylal synthesis process provided by this invention uses an organic-inorganic composite solid acid catalyst to synthesize industrial-grade methylal. This organic-inorganic composite solid acid catalyst is easy to separate from the product, has low corrosiveness to equipment, high catalytic effect, wear resistance, and good recyclability, making it a novel, efficient, green, and environmentally friendly production method.

The application discloses a water-based coating remover for aviation composite paint, which comprises the following components in percentage by mass: paint removal composition 10-25%, surfactant 1-6%, chelating agent 1-5%, corrosion inhibitor 1-5%, stabilizer 0.1-1%, and water; the paint removal composition comprises a paint removal degradation component and a penetrating agent, and the paint removal degradation component is selected from sodium hydroxide and monoethanolamine at a mass ratio of 1:1-1:2. The water-based coating remover for aviation composite paint is environmentally friendly, has low corrosion, is suitable for ultrasonic removal working conditions, has excellent chemical and physical stability in a severe cavitation environment, can remove high-performance organic-inorganic composite paint coatings attached to the surfaces of key components such as high-pressure turbine discs, low-pressure turbine discs and sealing rings, ensures that the paint removal process is continuous and efficient and does not cause damage to expensive base materials, and is suitable for the maintenance and removal of coatings of high-temperature components such as aircraft engines.

This invention provides a CMA environmentally friendly de-icing agent prepared from magnesite tailings and waste acetic acid, along with its preparation method and application. Belonging to the field of industrial solid waste treatment and utilization technology, it includes the following raw materials in parts by weight: 50-60 parts magnesite tailings, 40-80 parts waste acetic acid, 5-10 parts glacial acetic acid, 20-50 parts calcium oxide, and 1-5 parts magnesium oxide. By co-utilizing two industrial wastes—difficult-to-treat magnesite tailings and industrial waste acetic acid—a high-performance, low-corrosion CMA de-icing agent is prepared without deep purification. This achieves low-cost resource utilization of industrial waste and produces a competitive, environmentally friendly de-icing agent product, simultaneously solving multiple industrial and environmental problems such as solid waste accumulation, waste acid disposal, and the high cost and pollution of de-icing agents.

The invention discloses trachycarpus racemosus and application thereof and a preparation method of fungal chitosan, and belongs to the technical field of biology and application thereof. The strain is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.42357, and the preservation date is December 10, 2025. The bacterial strain disclosed by the invention is Lichtheimia ramosa BT-0-A-001-JZ-001 separated from a wine brewing environment, and fungal chitosan with high purity and high deacetylation degree can be extracted by culturing the Lichtheimia ramosa BT-0-A-001-JZ-001. As an effective source of chitosan, the problem that traditional chitosan extraction excessively depends on fishery resources is solved, and the problem that raw materials for producing chitosan are limited is solved.

The application discloses a method for preparing methyl valerate by butene carbonylation, and belongs to the field of catalytic chemistry. Raw materials containing butene, carbon monoxide and methanol are introduced into a reactor loaded with a solid acid catalyst, and a product containing methyl valerate is obtained through reaction. The application provides a new method for preparing methyl valerate by butene carbonylation with a solid acid catalyst. The method for preparing methyl valerate has the advantages of cheap and easily obtained raw materials, small corrosion of the system, easy separation of the product, less waste discharge, easy engineering of the fixed bed process, and suitability for single large-scale production.

The application belongs to the technical field of metallurgy, and particularly relates to a tungsten-molybdenum waste recovery method. The method places waste tungsten material or waste molybdenum material in an electrolysis system with sodium hydroxide or ammonia water as an electrolyte, and electrolyzes the waste tungsten material or waste molybdenum material as an anode to efficiently dissolve tungsten and molybdenum in the form of ions, so as to obtain an alkaline electrolyte rich in tungstate and molybdate; and then the electrolyte is subjected to subsequent treatment to recover corresponding products, thereby realizing the unity of process shortening, environmental friendliness and efficient resource recovery.

This invention discloses a spherical powder of tantalum-tungsten alloy and its preparation method and additive manufacturing method, belonging to the field of refractory metal material preparation technology. The preparation method includes: subjecting a homogeneous tantalum-tungsten alloy ingot to a three-stage hydrogenation treatment, sequentially holding at 0.01~0.04 MPa and 300~500℃ for 1~3 h, at 0.04~0.08 MPa and 900~1000℃ for 0.5~1 h, and at 0.02~0.05 MPa and 300~400℃ for 0.5~1.5 h. This segmented hydrogenation process controls the diffusion behavior of hydrogen in the alloy, achieving controlled embrittlement and avoiding over-hydrogenation. Further, multi-cycle crushing and dynamic sieving based on the target particle size range are performed to obtain hydride precursor powder, significantly reducing ineffective fine powder and improving the yield and production efficiency of the plasma spheroidization process. The resulting tantalum-tungsten alloy spherical powder has a sphericity of not less than 99%, an oxygen content of not more than 150 ppm, and a concentrated particle size distribution. It is suitable for additive manufacturing processes such as laser selective melting and electron beam selective melting, providing a reliable raw material for the forming of high-performance tantalum-tungsten alloy components.

The invention relates to the technical field of oxygen supply equipment, in particular to a portable plateau emergency oxygen supply device based on solid-liquid reaction, which comprises a mixing tank and a protective tank, an arc-shaped guide groove is formed in the side edge of the mixing tank, a sliding block is slidably connected in the arc-shaped guide groove, and a butt joint pipe A and a butt joint pipe B are respectively arranged at the top and the bottom of the mixing tank. A fixing rod is vertically fixed to the position, located on the side edge of the butt joint pipe B, of the bottom of the mixing tank, and a rotating ring A is movably connected to the bottom end of the periphery of the fixing rod. A torsional spring is installed between the bottom of the fixing rod and the top of the rotating ring A. A connecting rod is horizontally fixed to the side edge of the rotating ring A, and the rotating ring A is connected with the sliding block through the connecting rod. The device is small in overall size and excellent in portability, can be quickly started for oxygen generation and continuous oxygen supply when needed, meets the requirement for long-time oxygen supplementation, is suitable for plateau activities, can reduce the influence under the extreme leakage condition through an external protection assembly, and improves the overall safety of the device.

The utility model discloses a kind of granular water circulation systems, it includes powder filter, alkali tank, granular water tank, water quality monitor;The granular water inlet of powder filter is connected with granular water pipeline, the clean liquid outlet of powder filter is connected with granular water tank by liquid discharge pipeline, the backwash inlet of powder filter is connected with backwash pipeline, the blowdown of powder filter is connected with recovery tank by discharge pipeline;The outlet of alkali tank is connected with the inlet pipeline of granular water tank by first regulating valve, the overflow of granular water tank is communicated with discharge pipeline by overflow pipeline, overflow pipeline is equipped with water quality monitor, the water outlet of granular water tank is connected with the inlet pipeline of pelletizing water chamber by circulating pump.

This invention discloses a method, system, and product for separating and purifying high-purity copper-64 from a nickel target, belonging to the field of radionuclide preparation and separation technology. The method includes acid dissolution of the irradiated nickel target, and the resulting product containing... 64 Cu、 64 Ni、 61 The solution of Co was loaded onto a pretreated AG1-X8 anion exchange resin column, followed by rinsing with 50-60 mL of 6M HCl to remove Co. 64 Ni was removed by rinsing with 20-30 mL of 4M HCl. 61 Co was finally eluted with 4-6 mL of 2M HCl to obtain high purity. 64 Cu product. This invention achieves highly efficient and selective separation of 64Cu by optimizing the elution sequence and conditions. The product has a nuclear purity >99.9%, extremely low content of key metal impurities, and a separation efficiency of over 84%, making it suitable for medical applications. 64 A reliable solution has been provided for the large-scale production of Cu.

The invention discloses a method for preparing nitrogen-doped biochar based on one-step co-pyrolysis of thermosetting resin and biomass. The method comprises the following steps: uniformly mixing urea resin solid powder, biomass and an activating agent; placing the mixed material in inert atmosphere protection, and carrying out temperature programming to 500-800 DEG C to carry out co-pyrolysis reaction; after the pyrolysis is completed, cooling, washing and drying to obtain the carbon material. According to the invention, one-step co-pyrolysis of urea-formaldehyde resin and biomass is utilized, effective doping of nitrogen element is realized at a relatively low temperature, in-situ molding of the material is realized by utilizing the thermosetting characteristic of urea-formaldehyde resin, and a molded carbon material with good mechanical strength can be obtained without an additional binder; the alkalescent potassium salt is selected as the activating agent and is environment-friendly, the prepared carbon material has high specific surface area and ultrahigh microporosity, the CO2 adsorption capacity is remarkably improved, the process is simple, and the energy consumption is low.

The invention discloses a method for catalyzing ring-opening repolymerization of a cyclic dimer in a nylon 6 extractable oligomer under mild conditions, which comprises the following steps: mixing cyclic dimer powder with a sulfonic acid catalyst and water to obtain a mixture; heating the mixture to a first reaction temperature, and reacting in an inert gas atmosphere; carrying out vacuum drying on the reacted product; adding water, heating to a second reaction temperature, and carrying out prepolymerization reaction in an inert gas atmosphere; and after the prepolymerization is completed, cooling to a third reaction temperature, and devolatilizing under a vacuum condition to obtain the high molecular weight regenerated nylon 6. By means of the sulfonic acid catalyst, ring opening of the cyclic dimer can be effectively achieved at the low temperature, the use amount of the catalyst is effectively reduced, and the corrosion degree to equipment is relieved. The ring-opening product can be subjected to polymerization reaction to recycle the extractable oligomer of the nylon 6, and the total content of the extractable oligomer in the regenerated nylon 6 slice is effectively controlled.

The invention discloses a silicon surface cleaning agent as well as a preparation method and application thereof. The silicon surface cleaning agent is prepared from the following raw materials in percentage by mass: 3 to 10 percent of composite acid, 0.1 to 0.5 percent of chelating agent, 2 to 3 percent of ethanol, 0.1 to 1 percent of DMSO (Dimethylsulfoxide), 1 to 3 percent of surfactant, 0.1 to 0.3 percent of metal cleaning aid and the balance of deionized water. The composite acid is composed of inorganic acid and organic acid according to the mass ratio of (2-5): (1-5). According to the invention, efficient and specific removal of potassium and sodium ions is realized, and the defect of the traditional cleaning process in the aspect is overcome; meanwhile, the cleaning agent also has an excellent cleaning effect on organic oil stains and other multiple metal ions, the process is simple and friendly, and the cost is low.

This utility model belongs to the technical field of conveying systems, specifically a belt conveyor system with a sealed structure. The system includes a belt conveyor with sealing walls and / or sealing plates on its four sides and top, forming a sealed structure to completely seal the belt conveyor system. The sealed structure includes a lighting system and a spray system. The lighting system is located on both sides of the upper part of the sealed structure, and the spray system is located in the upper middle part. A main air duct connected to an external dust extraction system is located at the top of the sealed structure. This utility model significantly reduces corrosion in the ash and slag conveying system area and surrounding equipment, greatly improves equipment cleanliness, and significantly improves the working environment.

The invention relates to a method for preparing high-purity silicon tetrafluoride by dissociating fluosilicate through low-temperature plasma. The method comprises the following steps: crushing fluosilicate in a crusher, and heating and dewatering in a vibrated fluidized bed; the treated fluosilicate powder is conveyed to a plasma reactor through carrier gas to be dissociated to generate silicon tetrafluoride; and finally, silicon tetrafluoride generated by reaction enters a first-stage condenser to separate solid metal fluoride, then enters a cold hydrazine to be cooled for first-stage impurity removal, and then enters an adsorption tower for second-stage impurity removal, so that high-purity silicon tetrafluoride is obtained. The fluosilicate is dissociated by adopting a low-temperature plasma technology, so that high-purity silicon tetrafluoride is efficiently prepared under a low-temperature condition; meanwhile, the one-step method is short in conversion process, fluorine-containing waste is not generated, a simple purification step is combined, the production cost and the environment-friendly burden are reduced, the raw material adaptability is high, and operation is easy.

This invention relates to the field of material mixing, specifically a material mixer that facilitates internal cleaning. It includes a mixing drum and a position adjustment mechanism slidably mounted on the top of the mixing drum, comprising a component mounting cylinder and a sealing cap; and a stirring and cleaning mechanism comprising: a movable plate placed inside the component mounting cylinder; mounting ears placed on both sides of the outer wall of the component mounting cylinder, with a second telescopic rod embedded in the mounting ear, the bottom of the second telescopic rod connected to the movable plate; a rotating shaft rotatably mounted on the movable plate; a first connecting cylinder, the bottom of which is connected to a second connecting cylinder via a connecting rod; and a movable frame, both ends of which are inserted into the first and second connecting cylinders respectively, with a drainage recess and passive stirring blades inside the movable frame. This invention effectively facilitates the stirring and mixing of materials and the cleaning of impurities adhering to the inner wall of the mixer, thereby facilitating machine operation.

This invention provides a solid-liquid composite adsorbent for carbon dioxide capture, its preparation method, and its application, specifically relating to the field of carbon dioxide capture materials technology. The solid-liquid composite adsorbent of this invention includes a shell and a core; the shell comprises hydrophobic SiO2 and hydrophobic modified biochar; the core is an acidic gas absorbent. This invention utilizes a unique solid-liquid structure to combine the high specific surface area and low corrosivity of the solid adsorbent with the high adsorption capacity and high selectivity of the acidic gas absorbent, thereby improving the adsorption capacity of the adsorbent; by using a hydrophobic solid particle shell to encapsulate the acidic gas absorbent core, the contact area between the acidic gas absorbent and the capture equipment is reduced, preventing corrosion of the equipment by the acidic gas absorbent. As shown in the examples, the solid-liquid composite adsorbent provided in this application has a CO2 adsorption capacity of 1.5–5 mmol / g.

This invention belongs to the field of metallurgy and relates to a method for recovering silver from conductive silver paste. The method includes the following steps: S1, spray drying the conductive silver paste to obtain fine silver powder, and ball milling the fine silver powder to obtain a slurry; S2, clarifying and thickening the slurry to obtain a supernatant and a slurry underflow; pressure filtering the supernatant, and returning the filtrate to the ball mill; S3, adding methanesulfonic acid to the slurry underflow for leaching, controlling the time to 10-30 minutes, to obtain a leachate; filtering the leachate, the filter residue being silver powder; returning the filtrate for further leaching, and evaporating and crystallizing the filtrate after the Ag ion concentration in the filtrate reaches saturation to obtain silver methanesulfonate. The method of this invention has selective leaching characteristics for Ag₂O and Ag, and has the advantages of simple process flow, short reaction time, and high product purity, making it highly promising for industrial application.