46results about How to "Increase microporosity" patented technology

The invention discloses a preparation method of nitrogen-enriched active biomass coke. The preparation method comprises the following steps: (1) carbonizing a biomass raw material in a pyrolysis furnace with a nitrogen atmosphere, heating to 400-600 DEG C, and maintaining the final temperature for 30-60 minutes to preliminarily obtain a carbonized biomass coke of the raw material; (2) heating the carbonized biomass coke to 700-900 DEG C in an inert gas atmosphere, and switching the inert gas atmosphere in the furnace into a water vapor atmosphere when a set temperature is reached, and staying at the temperature for 30-60 minutes; and (3) switching the water vapor atmosphere into a NH3 atmosphere, putting the product obtained after the treatment in the step (2) into the NH3 atmosphere at 700-900 DEG C to perform ammoniated surface chemical treatment, staying for 60-100 minutes, and cooling to room temperature in an inert protection atmosphere to obtain the nitrogen-enriched active biomass coke. The invention also discloses a product prepared by the method. The product prepared by the method disclosed by the invention has a good pore structure obtained by activation and a lot of surface alkaline nitrogen-containing functional groups obtained by ammoniation, can well realize effective adsorption of acid gasses of CO2, SO2 and NOx at a high temperature.

The invention discloses an optimized long-life low-material-consumption refining ladle. The ladle comprises a ladle shell, wherein a permanent layer is built on the inner wall of the ladle shell; a cyclic work layer is poured on the inner wall of the permanent layer; a consumptive work layer is built on the inner wall of the cyclic work layer; the castable of the cyclic work layer comprises the following components in parts by weight: 55-70 parts of sintered microporous corundum aggregate, 5-10 parts of magnesium aluminum spinel aggregate, 10-25 parts of fine powder, 2-8 parts of micro powder, 3-8 parts of bonding agent, 0.1-0.5 parts of antidetonant, 0.05-2 parts of water reducing agent and 0.01-0.1 parts of foaming agent. The cast cyclic work layer improves the safety coefficient for use of the refining ladle, has good integrity and effectively blocks the penetration of molten steel from brick joints of the permanent layer, and the cast cyclic work layer has low thermal conductivity and good thermal insulation property and can greatly reduce the consumption of the refractory material per ton of steel.

The invention provides a manufacturing technology for low-sulfur activated carbon. A desulfuration process, an alkali wash process and a drying process are added in a carbonizing process and an activation process, wherein a desulfurization agent of 10-30% is sprayed into the carbonized material to oxidize the contained sulfur element to a water-soluble compound to be removed through rinsing; an alkali liquor such as ammonia water is adopted for regulation for neutrality, and a drying process is conducted; in the carbonizing process, carbonizing agents such as ammonium dihydrogen phosphate or ammonium chloride can be used for impregnating the carbonized material for carbonizing processing under the working condition of 160-330 DEG C; the desulfurization agent is preferably a blend of nitric acid with concentration of 60-70% and hydrochloric acid with the concentration of 25-37%. The manufacturing technology can effectively remove the sulfur element in the activated carbon, so that the activated carbon has a wider application range and a better effect, the porosity of the activated carbon is increased, and the adsorptive property is remarkably improved.

The invention specifically relates to a fused aza-heterocyclic aromatic hydrocarbon porous framework of a two-dimensional lamellar structure, and a preparation method and application thereof, belonging to the technical field of functional materials. According to the invention, aza-heteropolycyclic aromatic hydrocarbon is synthesized on the basiss of cyclization of a diamino group and a diketo group for formation of phenazine and is used as a monomer; and then aza-heteropolycyclic aromatic hydrocarbon is subjected to the Scholl reaction under the catalysis of a Lewis acid salt so as to allow aza-heteropolycyclic aromatic hydrocarbon to undergo homopolymerization at high temperature and low pressure, so a conjugated polymer material of a microporous structure and with two-dimensional lamellar layers for complex catalysis of metal is produced. The two-dimensional material has the characteristics of a high specific surface area, a full conjugate plane structure, heat stability, resistance to acid and alkali, excellent catalytic activity, high recovery rate, etc. The method provided by the invention is simple to operate and controllable in process; and the prepared material can be used for catalyzing a cycloaddition reaction of CO2 with epoxypropane compounds so as to immobilize CO2 and has good application prospects.

The invention discloses a preparation method of chimonobambusa quadrangularis bamboo shoot powder. The method comprises the following steps: raw material harvesting, blanching, cooling, shelling, splitting, microwave drying, superfine grinding, and packaging for storage. By virtue of the process and technical parameters of a blanching technology, a microwave drying technology and a superfine grinding technology, the solubility, reconstitution property, mouthfeeling and quality of the chimonobambusa quadrangularis bamboo shoot powder can be improved, the production technology difficulty of the chimonobambusa quadrangularis bamboo shoot powder can be solved, and the benign development of chimonobambusa quadrangularis bamboo shoot industry can be promoted.

The invention discloses a preparation method of calcined kaolin with high whiteness and ultrahigh oil absorption. The preparation method comprises the following steps: removal of impurities in coal gangue; batching; crushing; iron removal; dry grinding; light burning in a reducing atmosphere; crushing; blending of slurry; iron removal; wet grinding; blending of slurry; iron removal; horizontal screw classification; disc classification; filter pressing and dehydration; slurry formation; iron removal; drying; pre-dispersion depolymerization; calcining in a weak reducing atmosphere; rapid cooling; post-dispersion depolymerization; and preparation of the calcined kaolin. According to the invention, a dehydroxylation section is creatively arranged behind the dry grinding section and before thewet grinding section; a light burning dehydroxylation-decarburization technology is adopted; the granularity of the material is controlled during classification and scattering, so the particle size and morphology of the material are controllable, and the microporous area and the heat exchange area of the material are increased; and in the process of calcining, the material is rapidly calcined to remove hydroxyl and realize whitening, and is then calcined and rapidly cooled without causing closing and blockage of micropores, so porosity is improved, and the calcined kaolin with high oil absorption and high whiteness is prepared.

The invention discloses an outdoor high-weather-resistance bamboo scrimber and a manufacturing method thereof.The manufacturing method comprises the steps that bamboo units are sequentially subjected to high-temperature steam sterilization treatment, biological pretreatment, primary cooking treatment, saturated steam carbonization treatment and secondary cooking treatment, and then the mildew-proof and corrosion-proof bamboo units are obtained; and carrying out gum dipping treatment, drying and balancing treatment, assembling, hot-pressing forming and post-treatment to obtain the outdoor high-weather-resistance bamboo scrimber. The outdoor high-weather-resistance bamboo scrimber has the advantages of being high in weather resistance, high in strength, close to the color of bamboo wood and the like, can meet the requirements for production and manufacturing of outdoor bamboo engineering materials and engineering components, and can be widely applied to the field of modern bamboo structure building engineering.

The invention discloses a preparation method of a silk mask. The preparation method comprises the following steps of (1) enabling silkworms to uniformly spin on the surface of a support piece to obtain planar silk; (2) softening the planar silk; (3) soaking the softened planar silk in essence to enable the planar silk to fully absorb effective components in the essence; and (4) properly draining the planar silk fully absorbing the essence to obtain a planer silk mask body. Compared with common silk, the planar silk material is used as the mask substrate, so that on one hand, the complex process of silk reeling textile retreatment is omitted, the natural components and functions of silk protein are maintained to the maximum extent, the manufacturing cost is greatly reduced, and meanwhile, the advantages of natural skin friendliness, mildness and no irritation of the mask body are further enhanced.

The invention discloses a fermentation method of poultry manure mixed biochar, which comprises the following steps: S1, obtaining a segment-shaped material: rolling biochar entrained by double-layer paper for multiple layers, and cutting the rolled biochar into segments along the axial direction, wherein the segment-shaped material at least comprises a large material and a small material, and thevolume ratio of the large material to the small material is (2-4):1; and S2, mixing the raw materials: mixing 100-200 parts by mass of poultry manure, 10-15 parts by mass of the segmented material, 5-10 parts by mass of charcoal and 2-5 parts by mass of a microbial agent, and performing uniform stirring. According to the method, various volumes of segmented materials and biochar are mixed into thefermentation raw materials, and at least three-stage pore adjustment is formed in the thick-slurry poultry manure, so that the air circulation degree is improved, the available oxygen amount is increased, the degradation of organic matters is promoted, the degradation process is shortened, and the effective yield is increased; moreover, the segmented material structure is slowly decomposed, a support can also be formed in the fertilizer, a certain pore structure is generated, the air permeability and permeability of the fertilizer are improved, and the physical and chemical properties of soilare improved.

The invention discloses a foamed glass material for purifying water, and a preparation method thereof. Waste glass bottles undergo a series of treatments through special techniques to form the foamedglass material for purifying water, that is foamed micro-porous silicon pumice with an aperture of 1-4 mm, a water absorption rate of 5-10%, a stress of 1200-3000 N and a specific gravity of 0.5-0.8 g/ml. A foaming mixture is calcined at a high temperature to prepare the foamed glass material, and the foaming mixture includes 90-93 wt% of glass powder, 0.4 wt% of seashell powder having a particlesize of 2-4 mm, 0.6 wt% of seashell powder having a particle size of 1 mm or less and 0.2-1.0 wt% of activated carbon. The foamed microporous silicon pumice has the advantages of durability, high performances, non-toxicity, harmlessness, non-radioactivity, good chemical stability, good corrosion resistance, good weather resistance, insolubility and non-degradability, and the ammonia nitrogen, biochemical oxygen demand, chemical oxygen demand and other indicators of sewage treated with the foamed glass material are significantly reduced.

The invention discloses a novel disc pelletizing and sintering pellet binder and a preparation method thereof, the novel disc pelletizing and sintering pellet binder comprises calcium oxide, magnesium oxide, a tackifier, a water reducing agent and an organic high-molecular polymer, and the novel disc pelletizing and sintering pellet binder comprises the following components in percentage by mass: 40-52% of calcium oxide, 3-10% of magnesium oxide, 3-5% of the tackifier, 8-12% of the water reducing agent and 33-38% of the organic high-molecular polymer. The organic high-molecular polymer is set to be a water-soluble organic high-molecular polymer, the organic high-molecular polymer becomes a high-viscosity liquid after encountering water, the addition proportion is set to be 1-2% when the novel disc pelletizing and sintering pellet binder is used, and the optimal addition proportion is set to be 1.6% when the novel disc pelletizing and sintering pellet binder is used. When the novel binder is used, the quality of finished product pellets adopting the novel binder is superior to that of pellets prepared by adding bentonite. And by matching the novel binder, the pellet quality can be improved, the system cost before iron making is reduced, and conditions are created for improving the blast furnace productivity.

The present invention discloses a molecular sieve biological preparation and a preparation method thereof, and belongs to the technical field of biological preparations. The molecular sieve biologicalpreparation comprises the following raw materials in percentages by weight: 40-50% of clinoptilolite molecular sieves, 0.2-2% of probiotics, 5-10% of a biological nutrient, 10-20% of medical auxiliary materials and 20-40% of mineral water. The probiotics, biological nutrient, medical auxiliary materials and mineral water are prepared into a probiotic hydrate, the clinoptilolite molecular sieves are added, and low-temperature incubating, vacuum drying, crushing and packaging are conducted to obtain the molecular sieve biological preparation. The probiotics grow and breed in pore passages in amicro-pore structure of the clinoptilolite molecular sieves, the probiotics of different sizes are fully protected, and the probiotics withstand harsh environments of strong alkali, high temperature,low temperature, etc., are not killed by gastric acids in a strong gastric acid environment, and smoothly pass a strong acid corrosion of stomach and enter into intestinal tracts. The molecular sievebiological preparation improves an intestinal flora balance, improves an intestinal environment, and promotes digestion and absorption.

The invention belongs to the field of photocatalysis, and relates to a photocatalytic film, in particular to a preparation method of a copper sulphide-zinc oxide composite photocatalytic film, the composite photocatalytic film is composed of a zinc oxide film and a copper sulphide film, and a zinc oxide-copper sulphide composite layer is formed on the connecting surface of the zinc oxide film and the copper sulphide film; the invention also provides the corresponding preparation method. The defects that existing zinc oxide is small in response interval, high in recombination speed and the like are overcome, visible light is converted into an ultraviolet light area through zinc sulfide of the composite layer, corresponding requirements of zinc oxide are met, meanwhile, zinc sulfide rapidly transmits electrons of zinc oxide, combination of holes and the electrons is slowed down, and through electron transfer, copper sulfide and zinc oxide are promoted to form a synergistic effect based on electron transfer.