14088 results about "Fine powder" patented technology

A polymerization process for producing a tetrafluoroethylene copolymer, and the copolymer produced thereby, are provided. The copolymer is of the dispersion / fine powder type and contains polymerized tetrafluoroethylene monomer units and co-polymerized higher homologous comonomer units having the formula (CnF(2n+1))CH═CH2, wherein 6≦n<10, in which the primary particles are believed to have a core and shell structure and the polymerized comonomer units are present in an amount from 0.01 mol % to 0.3 mol %, based upon total copolymer composition. The copolymer has a raw dispersion primary particle size (RDPS) of less than 0.210 microns coupled with a standard specific gravity (SSG) of less than 2.143. Preferably the copolymer has comonomer units present in an amount from 0.05 mol % and 0.25 mol % and the RDPS is within the range between 0.178 microns and 0.200 microns, coupled with a SSG of less than 2.140. Copolymers produced according to the invention, (perfluorohexyl)ethylene (PFHE) and (perfluorooctyl)ethylene (PFOE), may be shaped into the form of 0.1 inch diameter expanded beading, which expanded beading can have a break strength of at least 10.0 lbs, and which may exceed 13.0 lbs.

The spherical catalyst carrier is prepared with alcoholated magnesium chloride containing double-ether compound in emulsifying pelletizer. Liquid titanium halide compound is carried onto the spherical catalyst carrier to form spherical solid catalyst component in the presence of electron donor. In the X-ray diffraction spectrogram, the spherical solid catalyst component has diffraction peak in 13.3 deg of 2theta angle, strongest diffraction peak in 26.5 deg of 2theta angle and no characteristic diffraction peak of alpha-anhydrous MgCl2 in 15 deg of 2theta angle. The catalyst of the presentinvention has very high activity and may be used to produce polymer with good form, high apparent density and less fine powder. The catalyst is used in homopolymerization and copolymerization of olefin and suitable for various polymerization process.

A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.

A process for the polymerization of a true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils.

A process for the polymerization of a true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils.

There is provided: a production process for a water-absorbing agent having stable properties in a short time; and a water-absorbing agent. The production process comprises the step of blending an acid-group-containing water-absorbent resin powder with a noncrosslinkable water-soluble inorganic base and / or an irreducible alkaline-metal-salt pH buffer and further with a dehydratable crosslinking agent reactable with the acid group, thereby subjecting the resin powder to crosslinking treatment, or comprises the step of blending an acid-group-containing water-absorbent resin powder with the above base and / or pH buffer and further with a crosslinking agent reactable with the acid group, thereby subjecting the resin powder to crosslinking treatment, wherein the resin powder has a weight-average particle diameter of 300 to 600 mum wherein the ratio of fine powders having particle diameters of not larger than 150 mum in the resin powder is not more than 10 weight %.

Metal powder Ta and / or Nb, with or without one or metals from the group Ta, Nb, Ti, Mo, W, V, Zr and Hf, is made in a fine powder form by reduction of metal oxide by contact with a gaseous reducing agent, preferably an alkaline earth metal, to near complete reduction, leaching, further deoxidation and agglomeration, the powder so produced being sinterable to capacitor anode form and processable to other usages.

The invention describes a health product additive and preparation for sots or hepatitis B pathogen carriers By adding medicinal fungus fermentation liquor as additive and using effective components and fine powder extracted from plants and herbal medicines by solvent as adjuvant, the health product can be made into forms of effervescent tablet, buccal tablet, chewable tablet, oral taken tablet, candy, chocolate, chewing gum, oral liquid, particle, soluble granules, capsule, aerosol, liquid beverage and solid beverage. The product can relieve alcohol effect, nourish stomach, protect liver, and help to remit hepatitis B virus and hepatitis liver cancer patient condition, achieves a quite important effect for protecting the health of the sots or hepatitis B pathogen carriers in daily or social occasions. The invention provides a good idea to the utilization of the large amount of active fermentation liquid generated with the thallus pharmacy in the medicinal fungus fermentation industries, and also provides a effective approach for increasing the utilization value of the large amount of wild plant resources such as wild jujube and haw widely distributed in the north areas.

Size-confined nanocomposite powders and methods for their manufacture are provided by coating fine powders with a nanoscale powder of a different composition. The nanocomposite plastics disclosed offer performance characteristics approaching those of metals and alloys. The nanocomposite powders are alternatively used for dispersion strengthening of metals, alloys, and ceramics. Novel materials based nanotechnology for energy devices and programmable drug delivery are disclosed.

A method for surface crosslinking water-absorbing resin of the present invention includes a step (1) of obtaining a wet mixture, a step (2) of obtaining a dried particulate composition, and a step (3) of carrying out a surface crosslinking reaction. With this, since a processing time of each step becomes short, it is possible to mass produce the water-absorbing resin having excellent physical properties. Moreover, a method for manufacturing the water-absorbing resin of the present invention includes a modifying step and a cooling step. The modifying step and / or the cooling step are / is carried out by using stirring means including a rotation axis having a plurality of stirring boards, and the stirring means includes the stirring board having a specific thickness and / or a scraping blade having a specific shape. With this, it is possible to suppress the generation of the fine powder in the modifying step and / or the cooling step.

A method for manufacturing a honeycomb structure having a low pressure loss and a high strength includes preparing a material composition containing a silicon carbide powder, a binder and an additive; molding the material composition to manufacture a pillar-shaped honeycomb body molded having cells disposed in parallel with one another and in a longitudinal direction; carrying out a degreasing treatment on the honeycomb molded; and carrying out a firing treatment on the honeycomb degreased body to manufacture a honeycomb fired body. The silicon carbide powder of the material composition contains a silicon carbide coarse powder and a silicon carbide fine powder having an average particle diameter (D50) smaller than that of the silicon carbide coarse powder, and the additive contains a metal oxide power. An amount of the metal oxide powder in the material composition is in the range of about 0.8 to about 4.0% by weight.

The present invention provides a highly productive method for manufacturing a water-absorbing resin, the amounts of fine powder and dust of which are small, the amount of residual monomer of which is small, and whose absorption rate is high. That is, the method for manufacturing the water-absorbing resin of the present invention is a method for crosslinking and polymerizing an aqueous solution of an acid-group containing unsaturated monomer, and is characterized in that stationary polymerization is carried out in such a manner that a solid matter is added to the monomer aqueous solution, and an initiation temperature of the polymerization is adjusted to 40° C. or more or a maximum temperature of the polymerization is adjusted to 100° C. or more.

A carbon fine powder is obtained by uniformly coating the surface of a carbon fine powder having a large specific surface area with a uniform thin film layer of a metal oxide, metal nitride or metal carbide as an electrode active substance material through induction of a sonochemical reaction. It is found that the obtained carbon fine powder has a low electrical resistance and shows a rapid faradaic process (pseudo-capacitance) of the surface coating layer. The coated carbon fine powder, a process for producing the same, and a supercapacitor and a secondary battery using the carbon fine powder are disclosed.

The invention relates to method and device for gasifying a multi-segment staged converted fluidized bed. The method comprises the following steps of: supplying coal; supplying gas; gasifying; slagging; and conveying fine powder. The device for gasifying the multi-grade staged converted fluidized bed comprises an agglomerating ash separating unit, a pyrolyzing and gasifying reactor of the multi-segment staged fluidized bed and a semicoke fine powder cyclic feeding unit. The invention has the advantages of high volume utilization rate of a gasifying oven, great handling capacity and high utilization rate of total carbon, is suitable for a coal staging and converting system and can be singly used for producing gas for mass coal-based methane synthesis and coal chemical industry.

Multifunctional liquid rubber spray coating comprises components of A, B, wherein A component comprises liquid rubber asphalt emulsion whose solid content is 50-75%, wherein 2-65% rubber elusion content, 30-97% asphalt elusion content, 0.0-5.0% carbon black, 0.0-6.0% ultra-fine powder, 0.025-2.50% anion dispersing agent and 0.025-3.00% anion surface activator, which is waterborne spray coating, and B component is water solution which comprises 3.0-18.0% concentration calcii chloridum (89.0-99.2%), sodium chloride (0.50-4.0%) and composite aluminum iron polymer (0.3-7.0%). The two components are sprayed on the same basal plane through adopting a double-component airless spraying device to form a gelatin film with 0.5-4mm after 3-5 seconds solidification, which has the characteristics of strong bonding, temperature resistance, weather resistance, and excellent chemical stability, heat insulation and puncture resistance. The A component can be individually sprayed, or can be combined with the double components.

Disclosed are nanocrystals comprising metals and metal alloys, which are formed by a process that results in a layer of graphite in direct contact with the metallic core. The nanocrystals may be used in vivo as MRI contrast agents, X-ray contrast agents, near IR (NIR) heating agents, drug delivery, protein separation, catalysis etc. The nanocrystals may be further functionalized with a hydrophilic coating, e.g., phospholipid-polyethylene glycol, which improves in vivo stability. The process comprises chemical vapor deposition of metals adsorbed onto silica as a fine powder, in conjunction with a carbon containing gas, which coats the metal particles. The silica is then etched away. Preferred metals include iron, gold, cobalt, platinum, ruthenium and mixtures thereof, e.g., FeCo and AuFe. The process permits control of the alloy compositions, size, and other characteristics.

A method for pelletizing and taking intensive measurements of a raw sample is disclosed. The method includes homogenizing and pelletizing the sample that is to be subjected to compositional or intensive analysis. The raw sample is mixed with several solutions containing epoxies and activators based in carrier solutions or solvents, and ground to a fine powder or gel. The gel is partially dried and conformed to a pellet shape. The pellet is then cured such that the epoxy and activator solutions react and form a binding agent capable of maintaining the structural integrity of the sample pellet during intensive analysis. An intensive analysis instrument, such as LIBS, may then be used to ablate the surface of the pellet. The pellet provides consistent ablation of the sample material for accurate intensive measurements.

The invention relates to a metal powder preparation device and method therefor. The device comprises an atomization furnace, a heater, a cooler, an atomization chamber, an atomizer, a pneumatic classifier, a middle bin, a sieving funnel, a screening machine, a deduster, a balance tank, a shell-and-tube heat exchanger, a vacuum obtaining device, a control system, an infusion tube, a conduit, a pipeline, a gas channel, a pneumatic butterfly valve, an electromagnetic valve and the like. The method comprises atmosphere preparation, metal smelting, infusion, centrifugal atomizing, pneumatic classification, mechanical screening, gas purification, cooling and the like, the metal is smelted and treated so as to be poured onto the atomizer for centrifugal atomization to form powder, the powder is classified by the pneumatic classifier, after classification, rough powder is screened by the mechanical screening so as to obtain the finished powder, fine powder is sent into the deduster by airflow for purification, the purified gas is driven by a high pressure centrifugal fan so as to be speeded up to be atomized and classified again after being subjected to heat exchange through the shell-and-tube heat exchanger. The device can be used for continuous production of spherical powder below -320 meshes, and the oxygen content is less than or equal to 80ppm.

A drying agent enclosed in an organic EL element is sealed with a shape with which particulate contamination becomes less than that of a conventional shape, while still capable of showing a moisture absorption capacity similar to that of a fine powder. A light emitting device, and an electronic device, having long life and having less particulate contamination than in a device manufactured by conventional processes, are provided by using the organic EL element. The drying agent, made from a compound capable of chemically absorbing moisture, is formed as a bulk porous body or a porous film, and is formed along with the organic EL elements within a container cut off from the atmosphere. In addition, the light emitting device and the electronic device are manufactured using the organic EL elements.

A treatment system to efficiently remove lead from dust contained in extracted cement kiln combustion gas while reducing facility and running costs. A treatment system 1 comprising a probe 3 for extracting a part of combustion gas, while cooling it, from a kiln exhaust gas passage, which runs from an inlet end of a cement kiln to a bottom cyclone; a first classifier 5 for separating coarse powder from dust contained in the combustion gas extracted; a dust collector 7 for collecting dust from the extracted gas containing fine powder discharged from the first classifier 5; and a second classifier 8 for dividing dust discharged from the dust collector 7 into fine powder and coarse powder, and others. Since more lead is distributed on the fine powder side classified by the second classifier 8, lead can efficiently be removed without using chemicals and the like. The fine powder classified by the classifier 8 may be desalted by washing; high-lead-level cake obtained after the washing can be recycled; or salt water can be added to a cement mill. The coarse powder may be added to a cement grinding process or returned to cement material grinding process after the desaltation through washing.

The present invention discloses building waste treating and reusing process, which includes the following steps: classifying building wastes into waste concrete, waste stone material, waste ceramic, waste sintered brick and waste lime-sand brick; crushing separately into coarse grains and eliminating metal, timber and other impurity; milling into 5 mm below regenerated fine aggregate; sorting 0.15 mm below high quality fine aggregate and milling into regenerated fine powder material of 250-600 sq m / kg specific surface area; and preparing mortar, concrete, asphalt concrete and other building material with the regenerated fine aggregate and the regenerated fine powder.

Method and apparatus for making atomic layer deposition on powdered materials are provided. A rotary vessel with tilted rotation axis can be used as the deposition chamber. The rotary vessel can be directly used as the deposition chamber, or the rotary vessel is positioned inside a vacuum chamber that serves as the deposition chamber. A hallow shaft can be used to deliver rotary motion and facilitate pumping. A tube can be inserted into the hollow shaft or the rotary vessel to introduce precursors. Gas diffuser and slowly increased pumping speed can be used to reduce the agitation caused by gas flow. Intermittent rotation, variable rotary speed, extruding structures on inner surface of the rotary vessel, and the addition of easy-to-agitate powder or beads of other materials can be used to enhance the powder agitation caused by rotation.

A magnetic toner includes: magnetic toner particles each comprising at least a binder resin and magnetic toner, and inorganic fine powder. The magnetic toner has an average circularity of at least 0.970, and a magnetization of 10-50 Am2 / kg at a magnetic field of 79.6 kA / m. The magnetic powder comprises at least magnetic iron oxide. The magnetic toner particles retain carbon in an amount of A and iron in an amount of B at surfaces thereof as measured by X-ray photoelectron spectroscopy, satisfying: B / A<0.001. The binder resin comprises a resin formed by polymerization of a monomer comprising at least styrene monomer. The magnetic toner has a residual styrene monomer content of less than 300 ppm, and contains at least 50% by number of toner particles satisfying a relationship of: D / C<=0.02, wherein C represents a volume-average particle size of the magnetic toner, and D represents a minimum distance between the surface of a magnetic toner particle and magnetic powder particles contained in the magnetic toner particle. Owing to the above features, the magnetic toner can exhibit good electrohotographic performances, including excellent chargeability and little transfer-residual toner, even in a cleanerless-mode image forming system.

The invention discloses a Chinese medicinal plaster for curing orthopaedics disease and the preparing method thereof, characterized by that it uses several ones of black-bone chicken, Chinese Angelica, Notoginseng powder,Myrrha, Rhizoma Drynariae, Dragon's Blood, Radix Curcumae, Common Burreed Rhizome, Zedoary, Giant Knotweed Rhizome, Ground Beeltle, Pyrite, and Frankincense as principal drugs and selects parts of 97 Chinese drugs such as Long-nosed Pit Viper, Earthworm, Dragon's Blood, Prepared ChuanWu, Pangolin Scales, Doubleteeth Pubesscent Angelica Root, Rhizoma Corydalis, Himalayan Teasel Root, Cortex Cinnamomi Cassiae, Flos Caryophylli, and Borneol as adjuvant drugs, according to different properties of Chinese drugs, fries partial medicinal materials, decocts partial light and strongly fibrous medicinal materials with water for three times, concentrates the decoction into extract, dries and crushes the extract into fine powder, and adds the fine powder into medicinal oil added with pills; and finally adds in powder of partial fine materials. Its formula and preparing method are peculiar and it is an ideal traditional external drug preparation for curing orthopaedics disease.

The invention relates to an improvement to abrasion-resistant fireproof plastic, which is characterized in that the invention comprises 60-80wt percent of corundum and / or porzite and / or Al2O3 larger than or equal to 80 percent of bauxite clinker, 5-10wt percent less than or equal to4 micron of alumina micro-powder, 6-15wt percent less than or equal to 0.025mm of chromium corundum fine powder, 2-6wt percent less than or equal to1micron of silicon fine powder, 5-10wt percent of kyanite or andalusite or silimanite, 12-15wt percent of aluminium dihydrogen phosphate or aluminium sulfate wedding agent, and 0.5-3wt percent of calcium aluminate or bauxite cement coagulant. Compared with the prior art, the abrasion-resistant fireproof plastic has the advantages of high compressive strength, good wear-resisting property, high temperature used and strong slag resistance and anti-etching power, thereby greatly prolonging the service life and meeting the use with higher requirements.