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37results about How to "Particle rules" patented technology

High-molecular mPEG-PLGA-mPEG accessory medicine for medicine use, prepu. method and application thereof

InactiveCN1537636AEvade captureAvoid the effect of adsorptionPharmaceutical non-active ingredientsLactidePolyethylene glycol
A high-molecular mPEG-PLGA-mPEG (PELGE) used as the axcessory of injection, oral-applied medicine, and the water-soluble medicine or the medicine difficult to dissolve in water is an amphipathic three-block copolymer, which is prepared from stannous octoate as catalyst, diisocyanate as coupling agent, polyethene glycol with single terminated end, glycollide, and lactide or polylactic acid-glycollic acid copolymer.
Owner:四川大学华西药学院 +1

Method and apparatus for atomizing, freezing and drying for powder production by using low-temperature low-dew point gas

The invention discloses a method for milling by low temperature low dew point gas spray freeze drying which uses an atomizer for nebulizing liquid to be dried into 1 to 250 micron droplets which are frozen into ice powder in the gas with the low temperature of -60 DEG C and the dew point of -70 to -80 DEG C, then air-intake temperature is adjusted to 2 to 4 DEG C lower than the eutectic temperature of materials, the gas passes through a pore plate of a fluidized bed to lead the ice powder which stays on the fluidized plate to be fluidized, and simultaneously the solvent in the ice powder is sublimated. The sublimation drying process is completed until the dew point of the gas at the gas vent returns to -55 to -60 DEG C. The ice powder is dried for 1 to 2 hours into powder products when the temperature is increased to 30 to 50 DEG C. The gas coming out of the gas vent returns to the place for low temperature low dew point gas preparation for recirculation. The method is characterized by easy operation, continuous duty, and the like, and is especially suitable for the drying of materials such as medicine, food, biochemical product, and the like, guarantees the quality of products and can directly obtain the dried powder products; simultaneously the drying time of the method is greatly shortened compared with the vacuum freeze drying.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1

Preparation method for increasing weather fastness of titanium dioxide

The invention belongs to the technical field of titanium dioxide preparation, and discloses a preparation method for increasing the weather fastness of titanium dioxide. The preparation method comprises the following steps: preparing titanium dioxide slurry; rising the temperature of the slurry to 80 to 90 DEG C, regulating pH (Potential of Hydrogen) to be 10.0 to 10.5, adding Na2SiO3 after homogenizing, and then homogenizing; regulating the pH of the slurry to be 4.5 to 5.5, enabling aluminum salt and diluted acid or diluted alkali to be in concurrent flow, keeping the pH of the slurry to be4.5 to 5.5, and then homogenizing; grinding the slurry for 15 to 30 minutes; regulating the pH of the slurry after grinding to be 8.0 to 9.0, homogenizing, then enabling the aluminum salt and the diluted acid or diluted alkali to be in concurrent flow, keeping the pH of the slurry to be 8.0 to 9.0, and then homogenizing; regulating the pH of the slurry to be 5.4 to 5.6, homogenizing, and then carrying out tertiary washing, flash evaporation and jet pulverization, thus obtaining a titanium dioxide finished product. The titanium dioxide prepared by the invention is higher in weather fastness andbetter in dispersity.
Owner:HENAN BILLIONS NEW MATERIAL CO LTD

Preparation method of positive material sodium hexafluoroferrate applicable for sodium or lithium ion batteries and clad material thereof

The invention discloses a preparation method of positive material sodium hexafluoroferrate applicable for sodium or lithium ion batteries and a clad material thereof. Sodium hexafluoroferrate sediment is prepared in a water solution by controlling the conditions of synthetic process, the sodium hexafluoroferrate material can be obtained through filtering and drying, and then the sodium hexafluoroferrate is mixed with a clad layer substance or a precursor thereof, so that the sodium hexafluoroferrate clad material is prepared through calcinations under different atmospheres. The sodium hexafluoroferrate material obtained in the invention is good in crystallization property and free of impurity phase; the particle morphology is regular, the particle size is uniform and controllable, and the mobility is good; and the sodium hexafluoroferrate and the clad material thereof are high in specific capacity and high in cycle stability. The preparation method is simple in technology, low in energy consumption, little in pollution and good in product performance, and is extremely applicable for industrial production.
Owner:HUNAN INSTITUTE OF ENGINEERING

High-performance lithium ion battery composite positive electrode material and preparation method thereof

The invention provides a high-performance lithium ion battery composite positive electrode material and a preparation method thereof, wherein the high-performance lithium ion battery composite positive electrode material comprises a high-nickel ternary positive electrode material matrix and a Bi2-aMaWO6 coating layer coating the high-nickel ternary positive electrode material matrix, and a is greater than or equal to 0 and less than 1, and M is any one or a combination of two or more of Zr, Mg, Al, Na, Fe, Ga, Mo, W, Y, Ti and Ce. According to the preparation method, the Bi2-aMaWO6 modified high-nickel ternary positive electrode material is obtained mainly through the high-temperature calcination of Bi2-aMaWO6 and the high-nickel ternary positive electrode material, the preparation methodis simple, and the prepared modified positive electrode material is regular in particle morphology, good in crystallinity and free of impurity phases; the generation and expansion of micro-cracks canbe successfully inhibited in the charging and discharging process, so that the harmful phase change from H2 to H3 is favorably reduced; and meanwhile, the specific discharge capacity, the cycle performance and the thermal stability of the positive electrode material are improved.
Owner:湖南桑瑞新材料有限公司

Electron donor of Ziegler-Natta catalyst and application of electron donor in vinyl polymerization

ActiveCN106008759AParticle rulesParticle Morphology RulesPolyolefinZiegler–Natta catalyst
The invention relates to an electron donor of a Ziegler-Natta catalyst, a catalyst component comprising the electron donor and the catalyst. The electron donor adopts a Si-Al ester compound; the catalyst prepared from the Si-Al ester compound serving as the electron donor shows higher catalytic activity, better hydrogen response and better copolymerization performance when applied to vinyl polymerization and copolymerization, and can be used for catalyzing vinyl homopolymerization or production of high-performance polyolefin materials with high bulk density, narrow particle size distribution and small fine grain content through copolymerization of vinyl and other alpha-olefins.
Owner:TIANJIN UNIV OF SCI & TECH

Hansenula polymorpha engineering bacteria for efficiently expressing CA10 virus-like particles and application thereof

The invention provides hansenula polymorpha engineering bacteria for efficiently expressing CA10 virus-like particles and application thereof. The engineering bacteria comprise a recombinant vector carrying CA10 virus P1 and 3CD genes, and an original strain of the engineering bacteria is uracil-deficient hansenula polymorpha AU 0501; and the P1 and 3CD genes are optimized according to hansenula polymorpha preferred codons. The invention further provides a preparation method of the CA10 virus-like particles. The preparation method comprises the steps that the engineering bacteria are cultured,the CA10 virus-like particles are expressed, and the virus-like particles are separated and purified by adopting ultrafiltration and three-step chromatography processes. The CA10 virus-like particlesand a vaccine prepared from the CA10 virus-like particles have good immunogenicity, safety and biological activity, the process is simple, purification is conducted by adopting a chromatography method, large-scale preparation and purification can be achieved, a high-purity (greater than 99%) VLP protein stock solution is obtained, and the engineering bacteria can be used for preparing the vaccinefor preventing CA10 infection and have good economic value and application prospects.
Owner:BEIJING MINHAI BIOTECH

Long-acting passivator for cadmium in soil, and preparation method and application thereof

ActiveCN110938435ARaise the pHImprove the passivation effect of the seasonAgriculture tools and machinesOrganic fertilisersPhysical chemistryCalcite
The invention discloses a long-acting passivator for cadmium in soil, and a preparation method and application thereof. The long-acting passivator for cadmium in soil comprises calcite mineral powder,humic acid and a binder, wherein the mass fraction of humic acid is 1-5%, and the mass fraction of the binder is 3-6%. The preparation method comprises the following steps: putting the calcite mineral powder into a disc granulator; mixing the humic acid and the binder and adding water to form an aqueous solution; and allowing the aqueous solution enter the disc granulator through multi-angle spraying, and enabling the above materials to be agglomerated into particles through granulation. According to the long-acting passivator for cadmium in soil disclosed by the invention, the calcite mineral powder is selected for cooperation with the humic acid, so in-season passivation effect is improved, and good subsequent passivation effect can be maintained; and with the preparation method disclosed by the invention, the obtained passivator is in the form of a regular particle and has high dispersion speed after meeting water.
Owner:ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES

Preparation method of tri-phosphor double-peak blue fluorescent powders for lamp

The invention discloses a preparation method of tri-phosphor double-peak fluorescent powders used for an energy-saving lamp, which has high heat stability and high brightness. The preparation method of the tri-phosphor double-peak blue fluorescent powders for the lamp comprises the steps of firstly weighing each chemical component according to a chemical expression of fluorescent material, then adding BaF2 being 0.1wt%-10.0wt% of the total weight of all chemical components, and CaF2 being 0.01wt%-4.0wt% of the total weight of the all chemical components, sufficiently and uniformly mixing the raw materials, and then burning and reacting sufficiently at 1350-1500 DEG C under the atmosphere of reduction gas and inert gas to obtain a final burning product, then grinding, washing, filtering, drying and screening the burned product to obtain the tri-phosphor double-peak blue fluorescent powders for the lamp. Due to the adoption of the method, the blue fluorescent powders with regular particle morphology, uniform particle size, relatively high brightness and high heat stability, and according to the preparation method, the preparation process is simple, a one-step reduction method is adopted, and the industrial large-scale production is facilitated.
Owner:LANZHOU UNIVERSITY

Preparation method for potash fertilizer particles

The invention relates to a preparation method for potash fertilizer particles. The preparation method is characterized in that the potash fertilizer particles are pelletized by a two-stage mixing extruder, potash fertilizer powder and additives are rapidly refined, scattered and mixed due to the strong shear force of the high rotation speed screw of a first-stage twin screw mixing mill, and then enter a second-stage single screw extruder through exhaust, the output end can conduct high pressure stable extrusion at a low rotation speed, and finally, pelleting is carried out by a die surface pelletizer to obtain the potash fertilizer particles. The potash fertilizer particles have high nutrient concentration, are regular in shape and uniform in diameter, and have high strength and good slow release performance. The preparation method is simple to operate, has strong technological adaptability, consumes little energy, has high granulation rate and high yield, and has market application value.
Owner:山东亿田生物肥料科技有限公司

A jujube granule producing method

A jujube granule producing method is disclosed. The method includes raw material selecting, cleaning, dehydrating, stoning, sterilizing, enzymolysis, fermentation, low-oxygen low-temperature heat-pump drying, nitrogen charging pressure difference rapid puffing, medium and short wave infrared drying, crushing, grading, packaging, and other steps. The enzymolysis is performed firstly so that jujube viscosity is reduced and jujube flavor is adjusted. Then through progressive multi-stage drying, the color of jujubes is kept, a proper tissue structure is formed, the water content is controlled ingeniously. Through combining a crushing manner, the rotating speed, environment temperature and humidity, and other factors, the problem that jujubes are liable to stick to form clump or liable to be powdered, and the like in granulation is overcome by and objectives of improving uniformity, reducing viscosity, maintaining the original color, increasing the crisp degree, making granulation easy and avoiding powder generation are achieved. The method is simple and convenient to operate, high in controllability and high in mechanization degree. The utilization rate, edibility and healthcare properties of raw materials are improved. A product of the method can be used for snacks, soup making, medicines, tea drinks and stuffing.
Owner:RES INST OF AGRO PROD PROCESSING SHANXI ACADEMY OF AGRI SCI

Large plastic part recycling processing device and processing method

The invention provides a large plastic part recycling processing device and a processing method. The processing device comprises a fixing support, a drying tank, a vacuum pump, a hot-melting dicing device and a material storage tank, the middle of the fixing support is provided with an opening, and the two sides of the drying tank are each provided with a connecting convex table; and the drying tank is erected at the opening of the fixing support through the connecting convex tables at the two sides, the connecting convex tables are connected with the fixing support through fastening bolts, the bottom of the drying tank is provided with the hot-melting dicing device, the material storage tank is connected to the lower portion of the drying tank, the portions, at the outer side of the joint, of the drying tank and the material storage tank are connected through fastening bolts, the vacuum pump is connected to one side of the drying tank, and the vacuum pump is placed on the fixing support. The large plastic part recycling processing device has the beneficial effects that energy consumption is reduced, noise is small, crushed particles are regular, and the occupied area is small.
Owner:TIANJIN LAIWO VACUUM DRYING EQUIP MFG CO LTD

Method for preparing active material calcium zincate of cathode of battery by utilizing airflow mill

The invention discloses a method for preparing an active material calcium zincate of a cathode of a battery by utilizing an airflow mill and belongs to the technical field of an active material of a zinc nickel battery. The method comprises the following steps: 1) uniformly mixing and stirring zinc oxide, calcium hydroxide and deionized water at a weight ratio of (4-6):(4-6):1, and then putting the mixture into a material inlet of the airflow mill and entering into a crushing chamber through an ascending pipe, thereby acquiring a crushed material; 2) putting the crushed material acquired in the step 1) into a classifying chamber for classifying, thereby acquiring classified particles; and 3) returning the classified particles acquired in the step 2), of which the grain size is less than or equal to 1000 meshes, to the crushing chamber for crushing, and discharging the classified particles of which the grain size is more than 1000 meshes from a product outlet, namely, acquiring the active material calcium zincate of the cathode of the battery. The calcium zincate product acquired according to the method is uniform in fineness, regular in particle shape, high in purity and high in material activity. The charging / discharging cycle life can reach above 3000 times.
Owner:秦立新

A kind of foot-and-mouth disease virus-like particle vaccine and preparation method thereof

The invention provides a foot-and-mouth disease virus-like particle vaccine and a preparation method thereof. Insert the two ORFs of the codon-optimized FMDV P12A and 3C genes in series into the transfer vector to construct a recombinant expression plasmid; or clone a single ORF containing the P12A3C gene under the promoter SV40 into the vector to construct a recombinant expression plasmid, and transform competent cells to obtain recombinant expression Bacmid‑DNA was transfected into sf9 cells to obtain insect cells capable of expressing foot-and-mouth disease virus-like granule protein. After culturing the cells, the supernatant is collected, concentrated by ultrafiltration, centrifuged, and chromatographically purified to prepare the VLP vaccine.
Owner:GPROAN BIOTECH (SUZHOU) INC

Preparation method for regular particle-shaped aluminate green emitting phosphor

InactiveCN102719247AHigh Relative Luminous BrightnessParticle rulesLuminescent compositionsChemical compositionCrucible
The invention discloses a preparation method for regular particle-shaped aluminate green emitting phosphor. The method comprises the following steps of: weighing raw materials according to the stoichiometric proportion of all chemical components in an expression (Ce0.63Tb0.37)MgAl11019; weighing a H3BO3 fluxing agent, a Li2CO3 fluxing agent and a AlF3 fluxing agent which are used as composite fluxing agents, and adding into raw materials and uniformly mixing; placing raw material powder in a crucible and calcining to obtain a primary calcined product; crushing the primary calcined product, placing in the crucible again, and calcining in the atmosphere of H2 / N2 to obtain a secondary calcined product; and crushing the secondary calcined product, washing, filtering, drying and screening to obtain a final product. According to the preparation method, (Ce,Tb)MgAl11O19 (CMAT) green emitting phosphor which is regular in particle shape, uniform in particle size and high in relative luminance is obtained on the basis of the conventional high-temperature solid phase method by mainly adjusting the proportion of all the fluxing agents in the composite fluxing agents; and the preparation process is simple, so that the green emitting phosphor can be industrially produced on large scale.
Owner:甘肃稀土新材料股份有限公司 +3

Method for preparing polycrystalline silicon particles from silicon wastes

The invention discloses a method for preparing polycrystalline silicon particles from silicon waste, and belongs to the technical field of photovoltaic products. According to the invention, silicon waste is used as a raw material, and cleaning, granulating, drying, microwave sintering, cooling and the like are performed to obtain polycrystalline silicon particles, wherein the specific physical strength of the polycrystalline silicon particles is that the polycrystalline silicon particles cannot be broken when rolling, falling off and the like within one meter, the purity of the polycrystallinesilicon particles is high (99.9999%-99.99999%), and the particle size of the polycrystalline silicon particles is uniform (300-30 mm); the method can be used in other required processes, increases the one-time charging amount, can also be used as a re-charging material, greatly reduces the production cost of polycrystalline silicon, and recycles resources; and the preparation method is low in cost.
Owner:SICHUAN HOT PULSE MICROWAVE SCI & TECH CO LTD

Physical method for preparing low-smoke and halogen-free polyolefin flame retardant, aluminum hydroxide

InactiveCN107400259AParticle rulesParticle shape rulesPolyolefinChemistry
A physical method for preparing a low-smoke and halogen-free polyolefin flame retardant, aluminum hydroxide is characterized by comprising steps as follows: S1, preparation of a semi-finished product, namely, crude aluminum hydroxide granule powder; S2, preparation of fine aluminum hydroxide granule powder; S3, post-treatment. The steps are concise, the method is energy-saving and environment-friendly, obtained aluminum hydroxide granules are regular in shape and large in yield and are uniformly mixed and distributed, and the yield in every hour exceeds 500 kg.
Owner:JINGJIANG CHENYANG CHEM CO LTD

Preparation method of lithium iron phosphate/lithium vanadium phosphate composite material

The invention relates to a preparation method of a lithium iron phosphate / lithium vanadium phosphate composite material. The method comprises the following steps: mixing iron phosphate and vanadium pentoxide which are utilized as raw materials with a lithium salt compound; adding a chelating agent; grinding and mixing; performing heat treatment in an inert atmosphere, and then adding a carbon source material; and heating, roasting and cooling to room temperature to obtain the carbon-coated lithium iron phosphate / lithium vanadium phosphate composite material. The lithium iron phosphate / lithiumvanadium phosphate composite material can be assembled into a testing battery of which the discharge specific capacity can reach 144mAh / g with the current of 150mA / g at room temperature and can reach105mAh / g with the current of 30mA / g at the temperature of minus 20 DEG C, the crystal form is complete, the particle appearance is regular, and excellent normal-temperature and low-temperature electrochemical performances are shown. All the raw materials in the method are bulk industrial chemicals, the cost is low, the process route is simple, the industrial scale production is easy to realize and the application prospect is very broad.
Owner:XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI

A recycling processing device and processing method for large plastic parts

The invention provides a large plastic part recycling processing device and a processing method. The processing device comprises a fixing support, a drying tank, a vacuum pump, a hot-melting dicing device and a material storage tank, the middle of the fixing support is provided with an opening, and the two sides of the drying tank are each provided with a connecting convex table; and the drying tank is erected at the opening of the fixing support through the connecting convex tables at the two sides, the connecting convex tables are connected with the fixing support through fastening bolts, the bottom of the drying tank is provided with the hot-melting dicing device, the material storage tank is connected to the lower portion of the drying tank, the portions, at the outer side of the joint, of the drying tank and the material storage tank are connected through fastening bolts, the vacuum pump is connected to one side of the drying tank, and the vacuum pump is placed on the fixing support. The large plastic part recycling processing device has the beneficial effects that energy consumption is reduced, noise is small, crushed particles are regular, and the occupied area is small.
Owner:TIANJIN LAIWO VACUUM DRYING EQUIP MFG CO LTD

Nixing pottery rapid manufacturing process suitable for dry pressing molding

The invention discloses a Nixing pottery rapid manufacturing process suitable for dry pressing molding, which comprises the following steps: 1, preparing a blank material from the following raw materials in parts by weight: 40-60 parts of east mud, 20-40 parts of west mud, 15-30 parts of kaolin and 5-10 parts of silicon carbide particle by mixing and crushing to obtain pottery clay powder, 2, adding water into the argil powder obtained in the step 1, putting the argil powder and the water into a ball mill, and grinding and mixing to obtain powder with the water content of 10-20%, 3, manufacturing a green body, 4, carrying out fettling, 5, drying the green body, 6, carrying out carving decoration, 7, firing the green body, and 8, carrying out grinding and polishing by placing the Nixing pottery fired in the step 7 stably, rubbing and grinding the surface of the Nixing pottery once by adopting coarse stone, and then rubbing and grinding by adopting soft stone until the surface of the Nixing pottery is smooth as a mirror. The method is simple in process and short in consumed time, and the production efficiency is improved.
Owner:钦州市文承陶业文化有限公司
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