2167 results about "Prill" patented technology

A lightweight, high-strength proppant is disclosed, comprising the formation of finely dispersed ceramic precursors and sintering at low temperatures, causing the formation and retention of mesopores and micropores in pelletized ceramic. A method of manufacturing such a proppant is also disclosed, comprising the steps of manufacturing finely divided ceramic precursors and additives using grinding, milling, and preferably sol-gel processes, and dispersing the finely divided ceramic precursors and additives in a liquid, preferably water. The dispersion has a viscosity profile, which permits the shaping of spheres using conventional pelletizing techniques. Drying of the pellets and sintering at temperatures below 1,400.degrees. C. forms and retains mesopores and micropores in the ceramic. Preferred total pore volumes range from 0.05 to 0.7 cm.sup.3/g. The pelletized and porous ceramic is useful as lightweight and high-strength proppants.

A disperser for dry powders which can be used with different dose systems, dose weights ranging from 2 to 25 mg and different types of powder formulation. In one embodiment, the disperser acts both as a de-agglomeration (disintegration; aerosolization) means and as an air classifier for especially adhesive mixtures. Only fine drug particles are emitted whereas the larger agglomerates and carrier crystals are retained by the disperser. Another embodiment enables time controlled release of carrier crystals in these mixtures. Yet another embodiment has optimized performance with spherical pellets, containing no carrier crystals. Other possible embodiments of the invention make it possible to control the total inhaler resistance and the powder deposition in the upper respiratory tract by means of the addition of a so-called sheath flow of clean air. Modifications also enable carrier retainment in the mouthpiece and elimination of the tangential flow component of the discharge cloud.

The invention provides a formulation to be administered as dry powder for inhalation suitable for efficacious delivery of active ingredients into the low respiratory tract of patients suffering of pulmonary diseases such as asthma. In particular, the invention provides a formulation to be administered as dry powder for inhalation freely flowable, which can be produced in a simple way, physically and chemically stable and able of delivering either accurate doses and high fine particle fraction of low strength active ingredients by using a high- or medium resistance device.

Phospholipid based powders for drug delivery applications are disclosed. The powders comprise a polyvalent cation in an amount effective to increase the gel-to-liquid crystal transition temperature of the particle compared to particles without the polyvalent cation. The powders are hollow and porous and are preferably administered via inhalation.

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.

A process for producing a proppant particulate substrate having a coating layer thereon including the step of blending a proppant particulate substrate with a powder coating composition at a temperature sufficient to cause the powder coating composition to coat the proppant particulate substrate with a powder coating; and a proppant particulate substrate coated by such a process.

The invention provides a preparation method of a self-suspension proppant for natural hydrofracturing construction, which comprises the following steps: by using 6-200-mesh granules as aggregate, adding an adhesive solution accounting for 10-30 wt% of the aggregate into the aggregate, and adding a water-soluble high polymer material accounting for 0.1-5 wt% of the aggregate; and stirring uniformly, drying and screening. The optimal selection of the raw materials and technological conditions greatly enhances the mechanical properties of the proppant. The obtained proppant has the advantages of small friction resistance and high strength, can be suitable for high-temperature conditions, and can be easily recovered; and the used coating material can not cause environmental pollution.

The invention discloses an ectopic classification leaching repair complete process of arsenic and heavy metal contaminated soil. The repair process comprises the following steps: the contaminated soil is magnetically separated to extract and recover target metals; a nonmagnetic component is divided into three grades by a vibrating screen after being primarily crushed; stones and boulders are flushed by clear water to directly serve as building materials; thick and fine soil particles obtained through screening respectively enter second-grade leaching mixing equipment for washing; the solid-liquid separation is performed for mud generated by washing through a two-stage hydraulic cyclone device; leaching waste liquid is purified and regenerated for recycling; sludge is added with such repair materials as curing/stabilizing agents for safety treatment after being dehydrated; and after the treatment, the soil particles can be backfilled, or can serve as roadbeds, building materials and the like. Based on the characteristic of large difference of arsenic and heavy metal contents in soils with different particle sizes, the soil leaching treatment according to the particle size is performed, so that the process has such advantages as low repair cost, high treatment efficiency and saving of energy consumption, provides a new method for soil heavy metal pollution abatement, and is broad in application prospect.

The present invention provides highly dispersible spray-dried powder compositions, and in particular, inhaleable dry powder compositions for aerosolized delivery to the lungs. The powders of the invention are produced by spray drying a 4 α-helix bundle protein under conditions which both (i) protect the protein from aggregation and (ii) provide particles suitable for inhalation (i.e., demonstrating superior aerosol performance).

A method for improving hydraulic fracturing creates coated proppants containing one or more chemical constituents bonded to a substrate and introduced into the fracturing fluid itself. The substrate that eventually acts as a proppant may be sand, ceramic, resin coated sand, and other materials. Typically, the materials that are coated as powders adhered to the substrate may include friction reducers, biosides, oxygen scavengers, clay stabilizers, scale inhibitors, gelling agents, or the like. By adhering solid materials to a substrate 12 by a binder 14, a single, solid, granular material may be maintained onsite, requiring reduced footprint, reduced mixing and may introduce almost instantaneously into a fracturing flow stream all the necessary chemical constituents, which will eventually become mixed. The result is reduced time, energy, manpower, equipment, and space at the sight, while reducing the environmental impact of transportation, spills, hydrocarbon use, and the like.

Methods to improve dewatering in industrial and municipal sludges are described. One method involves admixing sludge from a papermaking process and modified cellulose to provide modified sludge with the modified cellulose present in an effective amount to improve dewatering in the treated sludge, such as in allowing use of reduced amounts of coagulant and/or reducing dewatering times, increased dewatered volumes, and reduced sludge product moisture contents, and the like. The dewatered sludge may be formed into a dried particulate, and may be used as filler or other component of concrete, rubber, asphalt, plastics, resin-wood composite products, and other composite products.

The invention discloses a granular heating non-combustible tobacco matrix and a preparation method thereof. The preparation method comprises the following steps that firstly, tobacco raw materials are ground and sieved to obtain tobacco powder with particle size of 60-200 mesh; secondly, the tobacco powder, tobacco extracts and a humectant are evenly mixed, and then ethanol is added to prepare a soft material suitable for granulation; thirdly, the soft material is granulated through an extrusion method by means of a screen, wet granules are dried and aired to room temperature, and the granules are placed into a medicine sieve for size stabilization so as to obtain granular matrixes with different particle sizes. According to the method, the tobacco powder raw materials are prepared into porous particles with different particle sizes through a certain technology, so that the specific surface area of the raw materials is increased, and the suction resistance can be regulated during suction through pores of the matrixes and pores between the matrix particles; flue gas can be rapidly released in a heating state, and the uniformity of the flue gas can be improved.

The invention discloses an experiment device for synthesizing a marine natural gas hydrate sample. The device comprises a reaction kettle, an axial compression piston, a kettle outer jacket, an injection system, an axial compression control system, a confining pressure control system and an output system. The invention further discloses an experiment method adopting the experiment device for synthesizing the marine natural gas hydrate sample. The method comprises the steps that firstly, ice powder particles are manufactured, then, the ice powder particles and dried porous medium particles are mixed and placed into the high-pressure reaction kettle in the subzero low-temperature environment so as to simulate seabed geomechanical properties, then, methane is injected to generate a hydrate, ice is directly converted into the hydrate, and finally free gas inside the reaction kettle is removed through the liquid injection system. According to the experiment device and method, true marine natural gas hydrate samples which are hard to obtain on various geological conditions and various occurrence form conditions can be economically, efficiently and accurately obtained, the research on the hydrate is closer to the reality, and the experiment basis is provided for research of natural gas hydrate exploitation.

The invention provides a clean-water-carrying petroleum proppant for petroleum production of a low-permeability petroleum reservoir. The proppant is prepared through coating macromolecular polymer particles with the particle sizes of 3-100 meshes by using macromolecular resin, wherein the macromolecular polymer particles are white polymer balls formed through polymerizing olefin monomers or polymer microspheres formed through compounding after a silane coupling agent modified mineral material is added; and the proppant has the volume density of 0.5-1.0 g/cm<3> and the apparent density of 1.1-1.5 g/cm<3>. The invention simultaneously provides a preparation method of the petroleum proppant. The clean-water-carrying petroleum proppant prepared by adopting the preparation method can greatly reduce the viscosity of sand carrying liquid, reduce the damage to strata and pumps and even realize clean fracturing. Through the low-density proppant, the entire construction cost can be reduced, and the phenomenon of proppant discharging or crack emptying is difficult to occur.

Particles having a tap density less than about 0.4 g/cm3 are formed by spray drying from a colloidal solution including a carboxylic acid or salt thereof, a phospholipid, a divalent salt and a solvent such as an aqueous-organic solvent. The colloidal solution can also include a therapeutic, prophylactic or diagnostic agent. Preferred carboxylic acids include at least two carboxyl groups. Preferred phospholipids include phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phophstidylserines, phosphatidylinositols and combinations thereof. The particles are suitable for pulmonary delivery.

The invention relates to a process for preparing polyolefin antibacterial permeability membrane, which consists of mixing 10-30 contents of nanocalcium carbonate and 10-65 contents of heavy calcium carbonate first, adding 0.1-10 contents of unsaturated acid monomer, 0.1-20 contents of long fatty chain monomer, 0.001-5 contents of initiating agent, 0.1-10 contents of polyethersulphonate and 0.1-20 contents of macromolecular coupling agent and 5-80 contents of polyolefin resin, first preparing predisperse masterbatch of mixed calcium carbonate in the twin-screw extruder, afterwards, mixing 20-80 contents of predisperse masterbatch of mixed calcium carbonate, 0.1-5 contents of hole leveler, 0.1-0.5 contents of anti-oxidant, 2-20 contents of compound antibacterial mother particle and 20-70 contents of polyolefin resin in high-speed mixer, squeezing the prill by twin-screw extruder, drying and vacuum-packing, obtaining the special material of antibacterial permeability membrane. The invention is characterized in that the interactive condition between the polyolefin and calcium carbonate is strong, the filling material is readily dispersed in the polymeric matrix, the special material of permeability membrane can not only form film using doctor-blading process, but also can form film using blowing process, the pore diameter of the said permeability membrane is uniform, and its antibacterial behavior is excellent.

The invention discloses a novel material capable of imitating multiple ornamental sculpture stone materials. The novel material is prepared from a coagulation material and natural stone sand in percentage by weight, wherein the coagulation materials comprises the following raw materials in percentage by weight: sulfate aluminum cement clinker, white stone, calcium carbonate powder, high-class talcum powder, a super plasticizer, color powder and a thickening time control agent; the natural stone sand comprises the following raw materials in percentage by weight: pure white sand with the grain fineness of 1-2 mm, pure white sand with the grain fineness of 0.2-0.5 mm and colored sand with the grain fineness of 1-2 mm; the colored sand comprises one or two or more of pure red sand, pure pulp sand, pure blue sand and sand of other colors. The raw materials are finely grinded and compounded to obtain a coagulation material which is white in color, short in coagulation time and high in strength, various stone surface effects are achieved when various natural stone sands are compounded, the novel material can be produced in batch, and compared with a manner that sculptures are directly carved on stone materials, the novel material is much excellent in working efficiency, good in consistency of sculpture products, good in pattern abutting of finished products and low in production cost.

The present invention discloses a process for producing nano-powders and powders of nano-particle loose aggregate, which includes: (a) providing at least two reactant solutions A and B capable of rapidly reacting to form deposits; (b) supplying the at least two reactant solutions A and B at least at the reaction temperature into a mixing and reaction precipitator respectively, in which mixing reaction and precipitation are continuously carried out in sequence, the mixing and reaction precipitator being selected from at least one of a tubular ejection mixing reactor, a tubular static mixing reactor and an atomization mixing reactor; and (c) treating the deposit-containing slurry continuously discharged from the mixing reaction precipitator.

There are provided a cluster of thin sheet graphite crystals or the like which is useful as an electrode material for lithium ion batteries, hybrid capacitors and the like, and a method for efficiently producing the same at high productivity. The method is one for producing a cluster of thin sheet graphite crystals composed of aggregates in such a state that thin sheet graphite crystals extend from the inside toward the outside, comprising charging a powdery and/or particulate material of an organic compound pre-baked to an extent of containing remaining hydrogen in a graphite vessel, and subjecting the powdery and/or particulate material together with the vessel to hot isostatic pressing treatment (HIP treatment) using a compressed gas atmosphere under the predetermined conditions.

The invention relates to a technology for granulating powder. The technology comprises the following steps of: uniformly dispersing the powder into a liquid phase consisting of an adhesive, a tackifier and a dispersion medium to obtain a dispersion phase; selecting a system which is incompatible with the dispersion medium as a continuous phase; and suspending the dispersion phase into the continuous phase to form spherical particles, and curing the spherical particles to obtain the spherical particles of the powder. The used powder is an organic matter, an inorganic matter or a multielement mixture; the powder is prepared into the spherical particles, so the size range of the spherical particles can be changed from the micron level to the millimeter level as required; the prepared spherical particles still can keep the property of the original powder; the spherical particles are formed under the action of a shearing force and a surface tension; and the preparation of the spherical particles can be performed in glass, enamel or stainless steel reaction kettle with a stirring function and special granulation equipment is not needed.