32results about How to "Simple activation process" patented technology

The invention relates to a porous activated carbon fiber adsorbing material of a sheath-core composite structure and preparation thereof. The structure of the porous activated carbon fiber adsorbing material is as follows: a surface layer is made of macro-porous carbon fiber, and a core layer is made of non-porous carbon fiber; wherein the ratio of the cross-sectional area of the surface layer is controlled to be 10-40 percent, and the cross-section thereof is uniformly provided holes. The preparation comprises the following steps: (1) impregnating carbon fiber in aqueous solution of sodium salt for 2-4 hours, and then placing the carbon fiber in an activation furnace; (2) heating to 800-1100 DEG C under the protection of an inert gas, adding steam, and carrying out constant-temperature activation for 0.5-2 hour(s); and (3) reducing the temperature to be below 200 DEG C, and cutting off the inert gas and the steam, thereby preparing the porous activated carbon fiber adsorbing material. The strength of the adsorbing material provided by the invention is up to 0.3-0.6Gpa, and the surface layer thereof is of a porous structure, thereby not only prolonging the service life of the material, but also facilitating the loading of large-sized molecules such as biological cells and the like; and the preparation method can be controlled easily, the activation process is simple, and the invention is suitable for large-scale production.

The invention provides a method for stopping and controlling resistant pollutants in soil from migrating and gathering towards the interiors of plant bodies through biomass charcoal, a plant plantingmethod and application and relates to the technical field of environmental engineering. According to the method, the biomass charcoal is mixed with soil, and then the field moisture capacity of the soil is adjusted, kept for 5-20 days and preferentially kept for 7-15 days; the resistant pollutants comprise antibiotics, resistant thalli and resistant genes. According to the method, the technical problem is solved that in the prior art, a method for effectively stopping and controlling the resistant pollutants in the soil from migrating and gathering towards the interiors of the plant bodies does not exist; the method for stopping and controlling the resistant pollutants from migrating and gathering is suitable for the soil polluted by various antibiotics, resistant thalli and resistant genes and has a good stopping and controlling effect. In addition, the invention further provides the corresponding plant planting method, and the method for stopping and controlling the resistant pollutants in the soil from migrating and gathering towards the interiors of the plant bodies through the biomass charcoal and the plant planting method can be applied in the fields of agriculture and forestry.

The invention provides a method for preparing a conductive composite with attapulgite as a substrate. The method comprises steps as follows: activating attapulgite serving as the substrate, preparating a novel polyaniline conductive layer and compositng the substrate and the polyaniline conductive layer. The activation process is simple, the efficiency is high, and the cost is low; the prepared novel polyaniline conductive layer has excellent conductive performance, and the preparation cost is moderate; the adsorption effect of the attapulgite substrate and the novel polyaniline conductive layer is excellent, and the stability is high.

The invention relates to a technology that prepares a proton exchange membrane fuel cell electrode, comprising three parts of a pre-process of the proton exchange membrane, a preparation of a catalyst slurry and spray coating of a membrane electrode. The technology provided by the invention solves the problems that in prior art preparation process, the proton exchange membrane swells and rucks and the dosage of the catalyst is high and the preparation process is complicated. The prepared proton exchange resin has great elasticity and adhesive property, which is beneficial for improving adhesion of the catalyst layer and the proton exchange membrane and improves utilization ratio of the catalyst.

The invention relates to a porous activated carbon fiber adsorbing material of a sheath-core composite structure and preparation thereof. The structure of the porous activated carbon fiber adsorbing material is as follows: a surface layer is made of macro-porous carbon fiber, and a core layer is made of non-porous carbon fiber; wherein the ratio of the cross-sectional area of the surface layer is controlled to be 10-40 percent, and the cross-section thereof is uniformly provided holes. The preparation comprises the following steps: (1) impregnating carbon fiber in aqueous solution of sodium salt for 2-4 hours, and then placing the carbon fiber in an activation furnace; (2) heating to 800-1100 DEG C under the protection of an inert gas, adding steam, and carrying out constant-temperature activation for 0.5-2 hour(s); and (3) reducing the temperature to be below 200 DEG C, and cutting off the inert gas and the steam, thereby preparing the porous activated carbon fiber adsorbing material. The strength of the adsorbing material provided by the invention is up to 0.3-0.6Gpa, and the surface layer thereof is of a porous structure, thereby not only prolonging the service life of the material, but also facilitating the loading of large-sized molecules such as biological cells and the like; and the preparation method can be controlled easily, the activation process is simple, and the invention is suitable for large-scale production.

The invention belongs to the technical field of biological activated carbon preparation, and provides a method for preparing a biological activated carbon from a tomato and eggplant straw mixture. Themethod comprises the following steps: cleaning, pulverizing and mixing eggplant straw and tomato straw, soaking and activating with pyrophosphoric acid, carbonizing in a tubular furnace, recovering pyrophosphoric acid, rinsing, dehydrating, drying and pulverizing to obtain the biological activated carbon. The preparation process is simple, the production cost is low, the efficiency is high, and the prepared biological activated carbon is high in adsorption capacity and suitable for removing macromolecular harmful pollutants.

The invention provides a preparation method of a macropore activated carbon fiber, the strength of which is larger than 0.3 GPa. The preparation method comprises the following steps: a carbon fiber is soaked in mixed aqueous solution of sodium salt and acid for 12-24 hours, and dried under 100 DEG C after being taken out; then, the carbon fiber is put into an activation furnace, and heated to 800-1100 DEG C under the protection of inert gases; at the same time, vapour is introduced to activate the fiber for 0.5-1 hour. The strength of the obtained activated carbon fiber can reach 0.3-0.5 GPa,and the service life of the activated carbon fiber can be prolonged; the aperture of macropores on the surface of the obtained activated carbon fiber is 50-600 nm, thereby favoring the absorption of materials of large sizes. The preparation method directly utilizes the carbon fiber as the raw material, the activation process is simple, and the product strength is higher.

The invention belongs to the technical field of organic catalysis, and particularly relates to a preparation method of catalyst crystal and application of the catalyst crystal in catalytic degradation of organic wastewater, particularly, in catalytic degradation of 2,4-dichlorophenol. According to the preparation method, ammonium paramolybdate is adopted as a molybdenum source, melamine is adopted as a nitrogen source, ferric rhodanide is adopted as a sulfur source and an iron source to modify titanium dioxide, and brown catalyst crystal is prepared through in-situ reaction. A relatively high specific surface and catalytic activity are achieved, and the degradation rate for the 2,4-dichlorophenol is as high as 99% or greater.

The invention discloses an infrared window film getter. The infrared window film getter comprises a base layer, a Cr coating, a microstructure layer Cu, a zirconium-based getter and a nickel protective layer, wherein the Cr coating is plated on the surface of the base layer; the microstructure layer Cu is plated on the surface of the Cr coating and on the side, far away from the base layer, of theCr coating; the zirconium-based getter is plated on the surface of the microstructure layer Cu and on the side, far away from the Cr coating of the microstructure layer Cu; and the nickel protectivelayer is plated on the surface of the zirconium-based getter and on the side, far away from the microstructure layer, of the zirconium-based getter. The getter produced by the invention has large airsuction amount, high reliability and difficult particle generation, can be produced in a large scale, and has high process consistency and low cost, the getter is activated by vacuum heating, and theactivation process is simple and easy to operate.

The invention relates to preparation of electrodes of fuel cells and aims at providing an air cathode without a metal catalyst and a preparation method thereof. The air cathode comprises a carbon cloth or a stainless steel mesh as a base material. Both sides of the base material are respectively coated by diffusion layers and catalyst layers, wherein the diffusion layers are contacted with the air and the catalyst layers are contacted with electrolyte. The cathode of the invention is composed of multiple diffusion layers and catalyst layers, reduces loss of water due to evaporation and improves stability of the electrodes. One side of the cathode directly faces the air and oxygen is directly diffused to the catalytic surface of the cathode without additional air supply devices and drivingforce, thus greatly lowering the operation cost of the cell and improving the stability. The catalytic materials of the cathodes are active carbons featuring wide sources and low prices, without any metal catalyst, thus greatly reducing the constructive cost. The air electrode has the characteristics of simple structure, low cost and easy expansion and can be used for producing microbial fuel cells with high properties and low costs and simultaneously purify waste water.

The invention belongs to the technical field of textile fabric processing and discloses an antibacterial cotton fabric and a preparation method thereof. The preparation method specifically includes: (1) performing plasma treatment on cotton fabric; (2) mixing kanamycin, UMP, Saccharomyces cerevisiae extract, sugar, and potassium dihydrogen phosphate, adding them to water, and filtering after reaction to obtain an antibacterial finishing agent; (3) Apple seeds are pulverized, put into PBS buffer solution and fully stirred, filtered after leaching, and the filtrate is freeze-dried to obtain a glycosidase preparation; (4) The cotton fabric obtained through plasma treatment is immersed in an antibacterial finishing agent, And put into glucosidase preparation, fully impregnated; (5) wash and air-dry to make antibacterial cotton fabric. This antibacterial cotton fabric has long-lasting, broad-spectrum antimicrobial properties, is washable, and is non-toxic to humans and skin.

The invention relates to a concrete admixture, Which is made from a A component and a B component by steps of mixing, calcining and grinding; the A component includes following raw materials: coal gangue of 70 to 90 amounts by weight; limestone of 10 to 30 amounts by weight; gypsum of 2 to 5 amounts by weight; fluorite of 0.5 to 1.5 amounts by weight; The B component is standard coal; The calorific value of the mixed A and B components is more than 1600 kcal / kg. The invention also provides a method of preparing above mentioned concrete admixture by calcining coal gangue with a fluidized bed roaster, That is mixing the components well and sending into the fluidized bed roaster calcining for one to two hours at a temperature of 800 to 900 degrees, And then pulling out of the roaster for cooling, At last grinding into fine powder and screening to obtain products. The invention uses a simple technology, Increases utilization rate of coal gangue, Which is benefit for full use of the coal gangue, Being used as concrete admixture, With the advantages of more than 30% to 50% active amount, Low cost, Which can increasing intensity of concrete, Increasing impermeability and durability performance, And excellent performance.

The invention relates to a hydrogen storage alloy with high hydrogen storage capacity and a preparation method thereof. The hydrogen storage alloy with high hydrogen storage capacity is AB 2 Type, the A side is composed of Ti and Zr elements, the B side is composed of Mn, Cr, Fe elements, and the general chemical formula is Ti a Zr 1‑a mn b Cr c Fe d , where, 0.55≤a≤0.78, 0.8≤b≤1.0, 0.7≤c≤0.85, 0≤d≤0.25, 1.7≤b+c+d≤2.0. The hydrogen storage alloy of the present invention has a high hydrogen storage capacity, and can reach a hydrogen storage capacity of 1.70wt% or more after being activated three times under the conditions of a temperature of 180°C and a hydrogen pressure of 1.25Mpa, and is used in the field of metal solid-state hydrogen storage. Better market prospects.

The present invention provides a hydrogen isotope gas purification method, the purification method includes the following steps in turn: a. Leak rate inspection of the hydrogen isotope gas purification device, charging to 1.5MPa, and keeping the pressure for 60min; b. Pretreatment before purification ; c, purification treatment; d, post-processing. By adopting the purification method of the present invention, high-purity hydrogen isotope gas can be obtained.

The invention discloses a method for preparing nickel-base metal supported catalyst. The preparation method comprises the steps of reducing a nickel-base layered hydrotalcite precursor for 1 to 12 hours by use of hydrogen in hydrogen atmosphere at a temperature between 200 and 800 DEG C and directly generating the nickel-base metal supported catalyst. The composition of the nickel-base layered hydrotalcite precursor is Ni1-y-xMxAly(OH)2(CO3)y / 2+x(z-2) / 2.nH2O, wherein x is between 0 and 0.5; y is between 0.1 and 0.33; z is a valence of M; and the M is Fe, Co, Cu, Sn, Mg, Zn, La or Ce. As a direct H2 reduction-activation method leaves out the step of intermediate roasting, the method has the advantages of simplifying a catalyst- activating process and reducing energy consumption, and is an optimal option for preparing a metal supported catalyst by reducing and activating a catalyst precursor which contains a transitional metal catalyst prepared by a precipitation method.

The invention relates to a method for modifying carbon fibers for a paper-based friction material, and belongs to the technical field of preparation of paper-based friction materials. The method comprises the following operation steps of 1, adopting a carbon fiber pretreatment system; 2, implementing a carbon fiber pretreatment process; and 3, adopting a layer assembly deposition modification system of the carbon fibers, wherein the suspension liquid of the carbon fibers is used as a matrix for layer deposition modification, a multi-layer alternate deposition mode is adopted for layer deposition adsorption modification, and a modifier is divided into polymers with different anion and cation strengths; and 4, carrying out a layer assembly deposition modification process on the carbon fibers, and repeating the steps, modifying for 3-4 times, filtering and drying to obtain the modified carbon fiber. The obtained carbon fiber can be added as a component for the paper-based friction material. The method has the advantages of simple process and low energy consumption. The technical problems of dispersion, combination and the like of reinforced fibers in the preparation process of the paper-based friction material are solved. The method is suitable for modifying the carbon fibers in the large-scale production process of the paper-based friction material.

The invention relates to the field of fine chemical industry, in particular to a method for preparing isooctyl p-dimethylaminobenzoate through hydrogenation using water as a solvent. The method for preparing isooctyl p-dimethylaminobenzoate by hydrogenation using water as a solvent in the present invention is characterized in that it comprises the following steps: (1) adding water, isooctyl p-nitrobenzoate and active nickel catalyst in proportion Reactor; (2) Heating to 100°C, introducing hydrogen gas, heat-retaining and pressure-retaining reaction until no hydrogen is absorbed; (3) cooling down, adding paraformaldehyde to the reactor, and then adding active nickel catalyst in proportion; (4) Heat until, feed in hydrogen, keep warm and pressurize until no hydrogen is absorbed; (5) Continue to keep warm and keep pressure for several hours, stop the reaction, and take samples for analysis; layer, the water layer is discharged into the sewage system, and the oil layer enters the distillation tower; (7) heat up, the distillation tower is rectified and purified until it meets the product specifications, and then it is packed in barrels.

The invention belongs to the field of activated carbon and particularly relates to a pretreatment method for preparing high-specific surface-area multi-hole activated carbon with cotton stalks. The pretreatment method includes: 1), smashing the cotton stalks into particles and screening to remove impurities; 2), rinsing materials prior to dehydrating; 3), adding the materials into an alkalescent solution for dump leaching, rubbing the materials mechanically to divide the same into threads, extruding excess fluid and performing dump leaching once more; 4), placing the materials into a closed pressure vessel, feeding high-pressure steam 1.0-2.5MPa in atmospheric pressure for 5-20 minutes, releasing the materials and the steam prior to releasing pressure to normal pressure and allowing the materials to come out; 5), rinsing with deionized water and performing dehydrating; 6), performing uniform drying. By the arrangement, natural microchannel structure of the cotton stalks can be effectively utilized and expanded, the specific surface area is increased, quality raw materials are provided for low-cost subsequent preparation of high-specific surface-area multi-hole activated carbon process, usage of activating agents in the subsequent process is low, and the pretreatment method is simple in activating process, high in sustainability and suitable for scale production.

The invention relates to a regenerative adsorption material and a preparation method thereof, belonging to the technical field of preparation of environmental protection materials. The preparation method comprises the following steps: placing an activated sludge adsorption material prepared from excess activated sludge in a water body, and treating the algae and the algae in the water body. The pollutants are adsorbed to obtain precipitation, and then the precipitate is separated, and the separated precipitate is sequentially subjected to drying treatment, carbonization treatment, and water vapor activation treatment to obtain a regenerated composite adsorption material. Because the organic matter content of the regenerated composite adsorption material prepared by the invention is significantly increased, the carbonized regeneration composite adsorption material is a multi-component phase, has multi-shaped pores, and the pore size structure and specific surface area are significantly improved, so that the adsorption effect is better. And it is easy to reuse the waste.

The invention relates to a method for preparing an iron-containing soil conditioner, which comprises the steps of preparing ferrous ammonium citrate; the preparation step of ferrous ammonium citrate; Add iron powder to stir the reaction, cool down after the reaction, pass through ammonia gas to neutralize to pH 5.5-6.5, remove water, and obtain ferrous ammonium citrate. In the present invention, ferrous ammonium citrate is added to low-rank coal to make The water-insoluble humic acid in low-rank coal is activated into water-soluble humic acid. The activation process is simple, and the activation rate of humic acid can reach more than 50%. The iron element in the prepared iron-containing soil conditioner is divalent iron, which is easier Absorbed by crops, in addition, ammonium citrate, ammonium humate and the entire pH buffer system are conducive to the stability of ferrous ammonium citrate. Iron phenomenon, to avoid crop yellowing.

The invention discloses a method for removing wax before electroplating steel parts for a pump. The method comprises the following operation steps that 3-5 steel parts are connected in parallel and then are placed in a phosphorus-free cleaning fluid as cathodes, a direct current is conducted, and the wax is removed through electrolysis. According to the method for removing the wax through the electrolysis, the wax removing efficiency is high, and the wax removing speed is high; the cleaning liquid does not contain phosphorus, so that no pollution is caused to the environment; the cleaning liquid is stable, and almost no foam is generated during electrolysis, so that the danger that explosion is caused due to the fact that the foam encounters electric sparks is avoided; and moreover, the cleaning fluid can be recycled, so that the production cost is reduced, and the environmental protection is facilitated.