197 results about "Spherical granule" patented technology

Compositions containing polymeric micro- and nanoparticles with non-spherical shapes and methods for making and using such particles are described herein. The particles have a size range from an average diameter of about Compositions containing polymeric micro- and nanoparticles with non-spherical shapes and methods for making and using such particles are described herein. The particles have one or more dimensions ranging from about 5 nm to about 100 μm, preferably about 100 nm to 10 μm. The particles can have any of a wide variety of non-spherical shapes. The particles are generally formed by manipulation of spherical particles embedded in a polymeric film. A wide variety of resulting shapes can be made. The resulting shape is a function of whether the films are manipulated in a first and/or second dimension, and the processes used to liquefy the microparticles. Variations of the method of manufacture may be used to generate particles having the desired shapes in large, reproducible quantities. The resulting non-spherical shaped particles can be used to alter uptake by phagocytic cells and thereby clearance by the reticuloendothelial system.

The invention relates to a preparation method of ceramic granules, which comprises the following steps: drying and crushing coal ash, kaolin, ferric oxide and basic magnesium carbonate into powder after wet grinding; carrying out the biscuit firing treatment on the powder to prepare biscuit-firing granules after spherical granules are prepared; preparing microcrystal glass powder by utilizing an Li-Al-Si system; pouring the prepared microcrystal glass powder into a granulator to be stirred; preparing the biscuit-firing granules packaged by the microcrystal glass powder after the surface of the biscuit-firing granules is completely packaged by the microcrystal glass powder; placing the biscuit-firing granules packaged by the microcrystal glass powder into the granulator; adding the powder;preparing the ceramic granules to be treated through the biscuit firing after the biscuit-firing granules packaged by the microcrystal glass powder are completely packaged by the powder; and preparing the ceramic granules after the ceramic granules to be treated through the biscuit firing are placed into a muffle furnace to be sintered and crushed. In the invention, a packaging method is adopted to prepare the ceramic granules, the inner layer of the prepared ceramic granules is completely packaged by the glass powder, and the gas of the inner layer is prevented from discharging in the sintering course so that the inner layer is in a loose porous structure, thereby greatly reducing the water absorption rate of the ceramic granules and decreasing the specific gravity.

The invention relates to a preparation method of nanometer aerogel heat-insulation coating, which comprises the following steps: dissolving aerogel, solidifying the aerogel, aging, replacing by a surface modification solvent, drying at normal pressure and preparing lyophobic silicon dioxide aerogel; or supercritically drying and preparing hydrophilic silicon dioxide aerogel. The preparation method provided by the invention has the beneficial effects that the aperture of the silicon dioxide aerogel prepared by adopting the method provided by the invention is in nanometer-level distribution, and the main aperture of the silicon dioxide aerogel is10nm and is less than the free path of an air molecular movement, thereby greatly reducing the heat transfer generated by a gas molecular heat movement; the aerogel in the invention is in a network structure formed by overlapping the spherical granules of nanometer silicon dioxide, thereby reducing the contact area of solid granules, increasing the heat transfer path and further achieving the effects of heat maintenance and heat insulation; and lyophobic and hydrophilic type silicon dioxide aerogel can be prepared according to different drying processes to be used by matching organic or inorganic coatings.

There is provided nanometer-size spherical particles. The particles of the present invention are made of at least one selected from the group consisting of a metal, an alloy, and a metal compound. The particles include one or both of a polycrystalline region and a single-crystalline region. The particles have a particle size of less than 1 μm; and a sphericity of −10% to +10%.

The present invention relates to a method for making nitrogenous and complex fertilizers, in granule form, suitable for slowly releasing nitrogen, comprising the steps of preparing an aqueous urea/formaldehyde dispersion with a molar ratio from 0.8:1 to 2:1, adding an aqueous catalyzer solution in a weight ratio from 0.1 to 4%, controlling the pH of the aqueous dispersion to hold it within a range from 4.0 to 7.0, and supplying the aqueous dispersion to a recirculating granulating device, as a growth seed.

Production of active carbon from Chinese chestnut shell as raw materials is carried out by collecting dust on Chinese chestnut shell, drying at 105-140 Deg C., grinding into fines with grain size <0.053mm, blending with 0.15-0.45mol zinc chloride solution, obtaining granule with 4-5mm diameter or normalized spherical granule, drying, transferring into carbonizing furnace, carbonizing without oxygen and at 380-680 Deg C. for 200-240mins, transferring into vertical activating furnace, activating at 550-650 Deg C. and 0.08-0.15Mpa for 30-45mins, washing and removing zinc for activated products by HCl solution with pH 2-2.5 and 85-95 Deg C., solid-liquid separating, washing to neutralization with water, drying solid materials, grinding and grading, and obtaining crushed active carbon or granular active carbon or spherical activate carbon.

The invention relates to a preparing method of a lightweight ceramsite biological filter material. The filter material is prepared by subjecting clay mineral, a lightweight material, a pore forming agent and a binder which are adopted as raw materials to high-temperature calcinating, wherein the lightweight material adopts an inorganic material the true density of which is about 0.23 g/cm<3>. The method includes (1) a step of raw material preparation, namely a step of inner core matching, outer shell matching and glue preparing, namely a step of mixing the clay, the lightweight material and the pore forming agent, mixing the clay and the pore forming agent, and mixing the binder and water, respectively, (2) a step of granulation, namely a step of feeding the inner core matching material into a granulating machine, granulating to obtain inner core granules, feeding the outer shell matching material into the granulating machine, and granulating to obtain spherical granules, with the glue being sprayed at the same time of feeding of the outer shell matching material, (3) a step of drying, namely a step of drying the spherical granules to remove water, and (4) a step of calcinating, namely a step of calcinating the dried spherical granules to obtain the lightweight ceramsite biological filter material.

The invention discloses a spherical calcium oxide adsorbent and a preparation method thereof. High-content calcium oxide mineral and clay mineral are used as main raw materials, and the materials are mixed according to the following mixture ratio (in percentage by weight): 50 to 95 percent of the high-content calcium oxide mineral, and 10 to 50 percent of the clay mineral. The preparation method comprises the following steps: mixing the two minerals, molding the mixture in a spherical granulator by using 0 to 1 percent CMC water solution as assistant, screening out spherical granules with certain granularity range by using a two-layer sieve, and further drying, roasting and packing the spherical granules to obtain the spherical calcium oxide adsorbent. The spherical calcium oxide adsorbent comprises the following chemical components: 40 to 90 percent of calcium oxide, 0 to 50 percent of magnesium oxide, 5 to 30 percent of silicon dioxide, 5 to 30 percent of aluminum oxide, and 0 to 30 percent of sodium oxide. The adsorbent has good selective adsorption property and abrasion-resistant property, can be used as a drying agent in the hollow glass industry, can adsorb acid gases such as hydrogen sulfide, hydrogen chloride, sulfur dioxide, chlorine and the like, and can purify industrial waste gases.

The method of the present invention can 1) produce spherical and scaly ultrafine particles without pulverization, 2) obtain spherical ultrafine particles having a sharp spherical particle diameter distribution without requiring a sieving step, 3) produce spherical ultrafine particles extremely approximating a true circle and possessing a particle diameter of 100 nm˜50,000 nm allowing selection of a size suitable for the particular purpose of use and 4) produce spherical ultrafine particles on a commercial scale at low cost. There is also provided spherical ultrafine particles produced by the above production process. The spherical ultrafine particles of the present invention are characterized by a form having circularity of 0.9 to 1.0 and a particle diameter of 0.01 μm to 10 μm without pulverization. The spherical ultrafine particles can be produced by the method of the present invention using as a nozzle a base having special through holes and hole density. In this base nozzle, the through holes have a diameter of 0.05 μm˜50 μm, a through hole aspect ratio of 5 to 200 and a hole density of 100 to 7,000/cm².

The invention relates to a method for preparing rare earth doped yttrium aluminum garnet transparent ceramics by utilizing spray granulation modified powder. The method is characterized in that an alcohol-water system is adopted as a solvent and comprises the following steps: preparing rare earth doped Re to yttrium aluminum garnet(YAG) powder through a coprecipitation method; modifying the powder by adopting a spray granulation process; carrying out the molding through the mode combining dry pressing and cold isostatic pressing; preparing the rare earth doped Re to YAG transparent ceramics through degreasing, vacuum sintering, annealing treatment, plane grinding and polishing; modifying the powder through a spray granulation process, namely carrying out the ball grinding on the prepared Re to YAG transparent ceramics, a ball grinding medium and surfactants such as a sintering auxiliary, an adhesive, a plasticizer, a dispersant and the like; carrying out the twice granulation on the slurry obtained by the ball grinding through a spray drying method, and preparing powder after being modified into solid spherical granules or similar spherical granules. The modified powder has good dispersity, enhances the fluidity of the powder, is easy to mold, has the granule-stage proportion, greatly enhances the density of the biscuit and is beneficial to sintering at the later stage..

The invention discloses a spherical granule bacteria cellulose and preparing method thereof and special culture medium. The culture medium provided by the invention comprises carbon, nitrogen source, inorganic salt and growth factor, also comprises coconut water with percentage by volume 0%-80% and carbon source concentration 1-30g/L. The preparing method of spherical bacteria cellulose provided by the invention is to place the production bacterium of bacteria cellulose in the culture medium to oscillate for fermenting or in the fermentation cylinder to ventilate for cultivating. The spherical bacteria cellulose of the invention can be directly applied to the food processing without the cutting operations. The oscillation fermentation needs less nutrition, and is suitable for fermentation cylinder ventilated cultivation, the pollution probability is small, the product yield rate is high, the cellulose product is not traditional film sheets-shaped, and is a bran-new spherical granule-shaped, stabbed spherical or star flower-shaped, the harvesting and the rinsing are easy, especially without extra cutting operations, the spherical granule sizes can be regulated according to the fermentation condition and time.

The invention concerns at least one pillar in, or for use in, a microfluidic device wherein said pillar comprises, in cross-section, at least one particle abutment surface and an adjacent space that indents said pillar, or an adjacent groove that indents said pillar, to accommodate said particle; a plurality of such pillars arranged in an array; a method for separating particles in a fluid using said pillar, array or said device; and a diagnostic method involving the separation of particles from a fluid using said pillar, array or said device.

The invention relates to an environmentally-friendly natural multielement rock fertilizer, comprising the following components in percentage by weight: 45%-55% of quartzdiorite powder with particles being less than or equal to 200 meshes, 22%-25% of phosphoric metamorphic rock powder, 16%-18% of potassium-rich shale powder, 5%-8% of dolomite powder, 2%-4% of salt solution with the mass concentration of NaCl being 1%-3%. A preparation method comprises the following steps of: weighing the quartzdiorite powder, the phosphoric metamorphic rock powder, the potassium-rich shale powder and the dolomite powder, arranging the materials into a stirrer for mixing uniformly, spraying salt solution with the mass concentration of NaCl being 1%-3% into powder bodies mixed uniformly, preparing into spherical granules by a granulator, roasting the granules by a roaster, putting the granules into an electromagnetic field for carrying out magnetizing treatment, and preparing the environmentally-friendlynatural multielement rock fertilizer disclosed by the invention. By adopting the environmentally-friendly natural multielement rock fertilizer, the yield of crops is increased, the quality of the crops is improved, the soil structure is improved, and safe eating of the crops is ensured.

The invention discloses an enrofloxacin microcapsule preparation and a preparation method thereof. The enrofloxacin microcapsule preparation is prepared by 5 percent to 90 percent of enrofloxacin raw material and 95 to 10 percent of accessories, and the accessory is one of the followings or a mixture mixed by a plurality of the followings: 12 to 18 carbon fatty acid, calcium stearate monoglycerol ester, stearyl alcohol, saturated triglyceride, glycerol monoester, paraffin, animal wax, vegetable wax and fat powder, etc.. The appearance of the enrofloxacin microcapsule preparation is a white or light yellow spherical granule, the dispersion performance is good, the used accessory is safe, and the enrofloxacin microcapsule preparation has no toxicity or side effects for livestock and poultry and has a gradual release in stomach and intestine, thus maintaining the durability of the efficacy.

The disclosed method of measuring the flow of a fluid with a porous particulate ceramic tracer and an optical instrument is characterized in that spherical particles having diameters in the range of 0.5 to 150 mu m are used as the tracer. Inasmuch as the tracer particles for flow measurement are spherical, the sectional area of scattered light to be detected by an optical sensor means is constant regardless of the orientation of particles. Furthermore, spherical particles have no surface irregularities that might cause concatenation so that individual particles are not agglomerated in tracking a fluid flow, thus contributing to improved measurement accuracy.

The invention relates to a nanometer pore light-weight corundum refractory aggregate and a preparation method thereof. The technical scheme of the preparation method is that 1 to 15 mass parts of water-soluble salts are dissolved into 15 to 25 mass parts of water to obtain a mixed solution; then, 85 to 99 mass parts of industrial aluminum oxide micro powder is put into a rotating pelletizer; under the rotation condition, the mixed solution is uniformly sprayed onto the industrial aluminum micro powder; the rotating pelletizer rotates until the industrial aluminum oxide micro powder totally forms spherical particles; then, the spherical particles are dried for 12 to 36 hours under the condition of 110 to 200 DEG C; the heat insulation is performed for 1 to 8 hours under the conditions of 1750 to 1950 DEG C, and thus the nanometer pore light-weight corundum refractory aggregate is obtained. The preparation method of the nanometer pore light-weight corundum refractory aggregate has the advantages that the cost is low; the process is simple; the prepared nanometer pore light-weight corundum refractory aggregate has the characteristics that the apparent porosity is low; a great number of nanoscale intracrystalline closed opening air pores are contained; the heat conductivity is lower; the molten slag erosion resistant capability is high.

The invention discloses a multi-dimensional composite energy active material and a preparation method thereof. The material is composed of Muyu stone, tourmaline, medical stone, germanite, parmesan rock, igneous rock and ceramic clay. The preparation method of the multi-dimensional composite energy active material comprises the following steps: firstly, immersing parmesan rock powders with edible ethylic acid and then carrying out calcination, wherein the parmesan rock powders are crushed into nanometer grains; then carrying out high-speed stir and even mixing on the immersed parmesan rock powders and the balance of the nanometer grains of components and forming ball grains; finally, sintering the formed ball grains for 2-4 hours at the temperature of 800-1200 DEG C and carrying out disinfection by ultraviolet light and sterile packaging to obtain the material. The multi-dimensional composite energy active material in the invention can be applied to various water purification machines, water-quality filters and health cups. The drinking water treated by the material in the invention is no pollution, is rich in multi-mineral substances, has pH value in the range of 7.2-8.5, is microcluster water, has negative potential stability and qualifies with standards of high-quality drinking water.

The invention discloses a washing ball with bleaching and sterilizing functions. The washing ball is prepared by preparing spherical granules by mixing 1 to 5 parts of ceramic powder, 2 to 3 parts of negative ion powder, 2 to 3 parts of far infrared powder, 3 to 5 parts of medical stone powder, 2 to 5 parts of antibacterial powder, 1 to 4 parts of Tourmaline and 1 to 6 parts of clay powder, preparing a slow-release granular washing aggregate by calcining the spherical granules at the high temperature, and filling the aggregate in the washing ball. The washing ball is formed by butting two hemispherical shells, the circumference of the hemispherical shell is provided with regularly arranged osmosis holes, and a strong magnet of no lower than 1,800 gausses is arranged inside the dome end parts of the hemispherical shells respectively. The slow-release granular aggregate is prepared from natural raw materials and has no toxic or harmful substance components, so the washing ball has the advantages of no pollution and convenient use. In addition, the washing ball has incomparable sterilizing function compared with other washing articles.