469results about How to "Low bulk density" patented technology

A method for preparation of alcohols by catalytic hydrogenation of carbonyl compounds with hydrogen or hydrogen-containing gases in the presence of a hydrogenation catalyst of Raney type, where the catalyst is used in the form of hollow bodies, Preferred as catalytically active components are nickel, cobalt, copper, iron, platinum, palladium or ruthenium.

Basic magnesium carbonate comprising a tubular aggregated particle of flaky fine crystals.

The invention discloses a graded high-nickel ternary anode material, and a preparation method and an application thereof. The graded high-nickel ternary anode material is prepared by the following method: 1) mixing a high-nickel polycrystalline precursor with anhydrous LiOH and a doping additive, performing sintering, mixing the obtained product with a coating additive, and performing sintering toobtain a high-nickel polycrystalline material; 2) mixing a ternary monocrystalline silicon precursor with a lithium source and the doping additive, performing sintering, mixing the obtained product with the coating additive, and performing sintering to obtain a ternary monocrystalline silicon material; and 3) mixing the high-nickel polycrystalline material with the ternary monocrystalline siliconmaterial, or mixing the mixed material with the coating additive, and then performing sintering. The invention further discloses an application of the graded high-nickel ternary anode material in lithium batteries. The graded material prepared by the method provided by the invention has higher compaction and cycle stability than the single polycrystalline material, has higher capacity than the single monocrystalline silicon, and the gas production and service life problems of the battery can be effectively improved after the grading modification.

The invention relates to a foaming type inorganic heat insulation plate, a preparation method thereof and a heat insulation layer thereof, which belongs to the technical field of a heat insulation plate and a heat insulation layer, and provides a foaming type inorganic heat insulation plate with high efficiency and energy saving, a preparation method thereof and a heat insulation layer thereof. The heat insulation plate is prepared from the following raw materials in parts by weight: 10-55 parts of composite light weight admixture, 10-55 parts of cement, 5-30 parts of lime, 3-20 parts of plaster, 1-10 parts of wollastonite, 10-55 parts of water glass, 10-60 parts of foam body which is foamed by a foaming machine through a foaming agent, 3-20 parts of fly ash, 0.1-3 parts of gel powder, 0.05-2 parts of cellulose ether, 0.01-2 parts of glauber salt, 0.1-3 parts of water reducing agent, 0.1-2 parts of hydrophobic agent, 0.01-1 part of mekarlon, 1-10 parts of bone glue, 5-30 parts of emulsion, 4-12 parts of waste slag, 1-45 parts of water and 0.02-1 part of aluminum powder. The invention is applied to the technical field of heat insulation materials.

Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.

Engineered particles are provided may be used for the delivery of a bioactive agent to the respiratory tract of a patient. The particles may be used in the form of dry powders or in the form of stabilized dispersions comprising a nonaqueous continuous phase. In particularly preferred embodiments the particles may be used in conjunction with an inhalation device such as a dry powder inhaler, metered dose inhaler or a nebulizer.

A method for forming a silica coating on at least a portion of the surface of alkaline earth metal carbonate particulates in aqueous suspension and the silica-coated alkaline earth metal carbonate so produced are claimed. The claimed method consists of allowing soluble silicate ions in the aqueous phase to slowly react with the alkaline earth metal carbonate surface to form silica micro-particulates on the surface. This silica coating confers upon the composition unique properties among which are pronounced thixotropic behavior when incorporated into an aqueous suspension and increased oil absorption when dry. The pigment produced by this method is especially suited for use as a filler in paper.

The invention provides a method for preparing flake silver powder with low bulk density. The method comprises the following steps of reducing silver powder, i.e. adding pure water into a reaction container, and adding silver nitrate under a stirring condition to make the silver nitrate completely dissolved; adding a PH(Potential Of Hydrogen) value regulator, stirring, adding formaldehyde serving as a reducer to perform chemical reaction, washing the silver powder and drying; and ball-milling, i.e. weighing the silver powder, adding zirconia, filling in a ball-milling pot, adding a ball-milling solvent, a ball-milling aid and an emulsifier, ball-milling, sieving, washing by using a cleaning solvent, and drying to obtain the flake silver powder. The silver powder prepared in the reducing process by the method is not added with any dispersing agent, has low impurity content and high purity; and moreover, the technical process is simple, the ball-milling time is short, and the method is easily industrialized.

The invention relates to a method for preparing a film-coated ceramisite proppant by using oil shale wastes. The method for preparing the film-coated ceramisite proppant by using the oil shale wastes is characterized by comprising the following steps of: 1) selecting raw materials which comprise the following raw materials in part by mass: 50 parts of the oil shale wastes, 50 parts of bauxite, and 1 to 4 parts of caking agent; 2) uniformly mixing the raw materials to obtain a mixture; 3) putting the mixture into a pan-type pelletizer for pelletizing to obtain raw material balls; 4) sintering the raw material balls to obtain a ceramisite aggregate; and 5) heating the ceramisite aggregate to the temperature of between 100 and 240 DEG C, adding a resin into the heated ceramisite aggregate and stirring the mixture uniformly first to ensure that the resin forms a film on the surface of the ceramisite aggregate, then adding a curing agent and other auxiliary agents, stirring the mixture uniformly, adding a lubricating agent, stirring the mixture uniformly, cooling to obtain a new mixture, crushing the new mixture and screening the crushed mixture through a 20/40-mesh sieve to obtain thefilm-coated ceramisite proppant. The method can extensively use the oil shale wastes and can solve the problem that the oil shale wastes harm the environment.

The invention relates to a polyurethane and inorganic porous granule composite material and method for preparation comprising the steps of, carrying out surface organic modifying treatment to the molecular screen whose grain diameter is 0.05-40 um and bore diameter is 0.3-3nm, mixing homogeneously with polyesters or polyethers polyhydric alcohol by the stirring with mechanical force, performing fabrication with polyisocyanates, chain expanded cross linking agent and auxiliary agent through the conventional polyurethane synthesizing process by one-step method or pre-aggressiveness, the mechanic property and solvent resistance of the obtained composite material are improved substantially.

An osteoimplant is made up of a coherent aggregate of elongate bone particles.

The invention provides composite solid-waste lightweight high-strength haydite and a preparation method therefor. The composite solid-waste lightweight high-strength haydite is mainly prepared from the following raw materials in parts by weight: 40.0-60.0 parts of iron tailings, 10.0-15.0 parts of auxiliary raw materials and 0.1-3.0 parts of foamer. The composite solid-waste lightweight high-strength haydite further contains sludge, wherein the dry sludge content of the sludge is 30.0-50.0 parts. The preparation method comprises the steps: accurately weighing the sludge, the iron tailings, the auxiliary raw materials and the foamer according to a designed ingredient proportioning ratio, and carrying out uniform mixing so as to form a uniform basic mixture; and carrying out granulating and shaping so as to obtain unburned haydite, burning the unburned haydite, and carrying out annealing and cooling, thereby obtaining municipal sludge and iron tailing cooperated haydite. The haydite is prepared from the sludge and the iron tailings, which are cooperated with each other and serve as main raw materials, so that the sludge is subjected to harmless treatment and resource-converting utilization, the sludge, which is a municipal mineral product, is used for replacing a primary mineral raw material, and thus the economic and environmental benefits are remarkable.

The invention discloses an aerated brick. The aerated brick is prepared from the following raw materials by the conventional process for preparing the aerated brick: 30 to 35 weight parts of iron ore tailing, 5 to 10 weight parts of cement, 10 to 15 weight parts of quick lime, 5 to 10 weight parts of modified nano powder, 5 to 10 weight parts of broken glass powder, 3 to 5 weight parts of gypsum, 0.05 to 0.1 weight part of aluminum powder, 0.002 to 0.008 weight part of Chinese honey locust powder, 0.03 to 0.08 weight part of tea seed cake powder, 0.003 to 0.005 weight part of soda ash, 0.5 to 0.8 weight part of calcium stearate, 0.3 to 0.5 weight part of zinc stearate, 0.01 to 0.03 weight part of calcium chloride, 0.05 to 0.1 weight part of white emulsion and an appropriate amount of water. By adding nano mineral powder, the volume weight of the brick, and the energy consumption are reduced; the brick is high in thermal insulation performance and sound insulation performance; and compared with the conventional aerated brick, the aerated brick has the advantage that the thermal insulation performance and the sound insulation performance are improved obviously. Meanwhile, the raw materials are mixed according to an optimized formula; and the intensity and the freezing resistance of the brick are improved obviously.

The invention provides a foam concrete with large-dosage polystyrene particles and a preparation method thereof, which solve problems of water leakage and frost resistance of the foam concrete. The foam concrete comprises components in part as follows: 63-81 parts of ordinary portland cement, 63-81 parts of quick-hardening sulphoaluminate cement, 10-30 parts of coal ash, 0.5-1.3 parts of water reducing agent, 1-2 parts of accelerating agent, 0.6-1.2 parts of early strength agent, 1-2 parts of fiber, 2-4 parts of silica sol, and 50-70 parts of water. The percentage in volume (liter) of the polystyrene particles in added water is 200-400percent, and the percentage in volume (liter) of foam in the added water is 100-600percent. In the preparation process, the treated polystyrene particles stand for 10 min, and the foam can be added after standing uniformly-stirred cement slurry for 20 min. On the premise of ensuring the intensity, the foam cement disclosed by the invention has the advantages of higher heat preservation and heat-shielding performance, higher electric insulating performance, lower volume weight and lower water absorption. The problems of the water leakage and the frostresistance of the foam cement can be solved.

The invention provides a particulate clumping animal litter material comprising bentonite dust, a filler material, and optionally a coagulant, wherein the material comprises 50-95 wt. % bentonite dust, wherein the particles of the particulate clumping animal litter material have a weight averaged particle size in the range of 0.25-8 mm and wherein the material has a bulk density equal to or less than 700 gram/l. The invention further provides a process for the production of the product. The product is light weight but still clumpable and scoopable. The product according to the invention eliminates odours quickly and naturally with no need for added chemicals or perfumes to mask odours. The filler material is a protein based foam.

The invention relates to a method for preparing copper powder. The method for preparing low-apparent-density copper powder through water atomization comprises a smelting process, which is to smelt raw materials put into a smelting furnace at the temperature of between 1,100 and 300 DEG C, constantly stir and simultaneously performing air-blowing operation. The method has the advantages of using no copper oxide and reducing production cost.

The invention discloses a single crystal nickel-cobalt-manganese lithium anode material, a precursor and preparation methods for the single crystal nickel-cobalt-manganese lithium anode material and the precursor. The molecular formula of the anode material is LiNi<x>Co<y>Mn<1-x-y>M'<z>M' ' <w>O<2-delta>R<delta>(a being greater than or equal to 0.95 and smaller than or equal to 1.25, x being greater than or equal to 0 and smaller than or equal to 1, y being greater than or equal to 0 and smaller than or equal to 0.5, z being greater than or equal to 0 and smaller than or equal to 0.01, w being greater than or equal to 0 and smaller than or equal to 0.05, delta being greater than or equal to 0 and smaller or equal to 0.02). By adding a dispersant and controlling the content of a co-precipitation reaction complexing agent, the synthesis pH value and the reaction temperature, a nickel-cobalt manganese hydroxide precursor with small particles, loose shape, small density and large specific surface area is obtained. A nickel-cobalt-manganese lithium anode material with typical single crystal shape is obtained by sintering the precursor with a lithium salt and a specific melting acceleration element additive. The invention has simple process, easy process control and no need for modification or addition to original devices. The obtained precursor is easy to react and combine with the lithium salt, which reduces the sintering temperature, simplifies the sintering process and greatly improves the production efficiency.

The invention relates to a method for comprehensively utilizing low-concentration heavy metal-containing soil improvement and repairing damaged soil by plants after detoxification of a contaminated field. The method comprises the following steps of: conveying of low-concentration soil after heavy metal-containing soil is detoxified, sludge and pulverized fuel ash; principal fermentation, mixing of various ingredients; primary fermentation; static state of post-fermentation (secondary fermentation); uniform turning (aerobic and anaerobic) fermentation; conveying of improved soil; and vegetation repairing (woody and herbaceous plants) planting for the contaminated soil. In the method, a modifier is added for modification, so that the content of heavy metals in the soil is reduced, the structure and pores of the damaged soil are repaired, and the permeation and air permeability of the soil are improved; and organic matters and other noxious matters in sludge and soil are decomposed and degraded in a certain condition by utilizing microbes in the sludge to reduce volume weight and compactness, so that the improved soil forms a substance similar to humus soil to serve as a biochemical process of the improved soil and fertilizer. According to the method, the planted vegetation growing environment of the land which uses the improved soil as a soil base material is ensured, so that the waste is used to treat waste, and the comprehensive utilization is improved.

The invention discloses a cast-in-situ straw/ash magnesium oxychloride cement wall and a construction method. The straw/ash magnesium oxychloride cement wall is obtained by processing straw, ash, light burned magnesia, magnesium chloride and the like and performing in-situ casting under the action of a modifier. The straw/ash magnesium oxychloride cement wall comprises the following raw materials in percentage by mass: 45 and 60 percent of magnesium oxide, 25 to 40 percent of solution of magnesium chloride, 2 to 20 percent of straw, 5 to 15 percent of ash and 0.5 to 2 percent of modifier. When the wall is cast in situ, the magnesium oxide, the solution of magnesium chloride, the straw, the ash and the modifier are mixed and stirred, and water is added into the mixture according to the water absorption of the straw to perform one-time forming through in-situ casting after the mixture is stirred uniformly. The wall is characterized in that the doping volume of the straw can be changed according to design requirements, and the straw can be used as inner and outer partition plates; the binding power is strong, so the adhesion process of the cast-in-situ wall materials and the conventional wall materials is avoided; due to the addition of the straw, the volume weight of products is reduced and the heat-insulating and heat-shielding performance of the products is improved; and a large amount of waste material ash, straw and the like is utilized to relieve the environmental burden effectively and reduce the cost, so the wall has great economic and social benefits.

A method for continuously producing sponge bodies (1) made of regenerated cellulose using at least partially agglomerated pore inducers made of sodium sulphate decahydrate is provided. First, a viscose solution is provided. A pore inducer is added to said viscose solution. The viscose solution is laid onto a conveyer belt which is continuously moving. The viscose solution is led through baths on the conveyor belt, resulting in a porous mass made of regenerated cellulose.

The invention relates to a sulfur and arsenic adsorbent and a preparation method thereof to mainly solve the problems of high bulk density and low sulfur and arsenic capacity of sulfur and arsenic adsorbents in the prior art. The sulfur and arsenic adsorbent comprises, by weight, 1-10 parts of aurichalcite, 10-50 parts of copper oxide, 10-60 parts of zinc oxide, 0.1-5 parts of iron oxide and 0.1-5 parts of manganese oxide. The sulfur and arsenic adsorbent adopting the above technical scheme well solves the problems, and can be used to purify natural gas, synthetic gases and lightweight gas and liquid hydrocarbons.

The invention provides a porous petroleum fracturing propping agent and a preparation method thereof, and belongs to the technical field of oil-gas well fracturing in oil exploitation. The porous petroleum fracturing propping agent is prepared from bauxite fine powder, bentonite, manganese powder, silicon carbide fine powder, kyanite fine powder and activated alumina fine powder. Compared with an existing medium-density petroleum fracturing propping agent, the porous petroleum fracturing propping agent has the advantages that particles of the roasted propping agent have more opening pores by adopting silicon carbide as a pore forming agent, more scale inhibitors can be accommodated in the propping agent since the porous structure is capable of providing a space structure to portability of the scale inhibitors, and generation of well scale is prevented or reduced by means of slow release of the scale inhibitors after the propping agent and fracturing fluid are pumped into the well by high pressure. Furthermore, the porous petroleum propping agent has a rather low volume density, and the low-density propping agent can be used for overcoming the defect that the fracturing fluid and the propping agent are blocked to flow deep to the rock crack since a high-density propping agent easily forms moundy accumulation at the port of the rock crack, so that the yield of an oil-gas field can be increased.