1867results about How to "Avoid easy separation" patented technology

A cooling fan includes an impeller which comprises a plurality of radially extending blades, each of which includes a blade hub, a blade tip and a blade midspan approximately midway between the hub and the tip. In addition, each blade includes a camber of between about 60° and 90° at the blade hub, between about 15° and 40° at the blade midspan and between about 15° and 40° at the blade tip.

An adhesive composition for medical adhesive tapes, comprising a base polymer containing a pressure-sensitive adhesive polymer obtained by crosslinking or curing a precursor containing a urethane acrylate oligomer and an ultraviolet (UV) initiator, the base polymer having a glass transition temperature (Tg) of 0° C. or less.

A method of isolating epithelial cells from a human skin tissue or internal organ tissue using trypsin and ethylenediamine tetraacetic acid (EDTA) simultaneously with the application of magnetic stirring, a method of preconditioning isolated biological cells by the application of physical stimulus, i.e., strain, are provided. Epithelial cells can be isolated by the method with increased yield, colony forming efficiency (CFE), and colony size. Also, the increased percentage of stem cells in isolated cells is advantageous in therapeutic tissue implantation by autologous or allogeneic transplantation. In skin cells preconditioned by the application of strain, cell division is facilitated, and the secretion of extracellular matrix components and growth factors and the activity of matrix metalloproteinases (MMPs) are improved. When preconditioned cells are implanted by autologous or allogeneic transplantation to heal a damaged tissue, the improved cell adhesion, mobility, and viability provides a biological adjustment effect against a variety of stresses or physical stimuli which the cells would undergo after implantation, with improved capability of integration into host tissue, thereby markedly improving the probability of success in skin grafting.

The invention discloses a magnetic gold nanoparticle composite material, and a preparation method and application thereof. The preparation method comprises the following steps: synthesizing ferroferric oxide magnetic microspheres, adding tetraethoxyl silicon to implement hydrolysis and polymerization on the magnetic microsphere surfaces, adding N-(2-aminoethyl)-3-aminopropyltrimethoxysilane to obtain surface-modified double-amino-group Fe3O4 / SiO2 magnetic microspheres, and compounding the surface-modified double-amino-group magnetic microspheres with gold nanoparticles. The chelation action of the double amino groups is utilized to adsorb the gold nanoparticles more firmly; and the material combines the surface selectivity of the gold nanoparticles and the superparamagnetism of the magnetic nanoparticles, can extract benzopyrene in water, and can implement quick and efficient separation.

The invention discloses a magnetic carbon nanotube composite material and a preparation method and an application thereof. The preparation method comprises the following steps: adding FeCl3.6H2O to an ethylene glycol solution; then adding anhydrous sodium acetate and polyethylene glycol; adding a carboxylated multiwalled carbon nanotube; performing ultrasonic dispersion; adding hexamethylenediamine or ethanediamine; heating to 200-300 DEG C for reaction for 8-24h; and washing and performing vacuum drying to prepare the amino-modified magnetic Fe3O4-carbon nanotube composite material. The amino-modified magnetic Fe3O4-carbon nanotube composite material prepared by the invention is of nanoscale and superparamagnetism, can be stably dispersed in solutions, and can be quickly separated and enriched through a simple action of a magnetic field. As an adsorbent, the material is large in superficial area and has various active groups on the surface. The material can adsorb pigments from complex substrates through pi-pi electron interaction and hydrophobic effect of the carbon nanotube and can adsorb compounds such as organic acids and phenols through weak anion exchange effect of amino groups on the surfaces of magnetic nanoparticles.

The invention discloses a medium and low temperature coal tar deep processing method. Medium and low temperature coke material is pretreated and fractionated to obtain light fraction, carbolic oil and heavy fraction, dephenolization treatment is carried out on the carbolic oil to obtain phenols product and dephenolized oil, the dephenolized oil and the above heavy fraction carry out pyrogenetic reaction jointly to obtain various carbonized products, wherein carbonized naphtha, at least one of carbonized diesel oil and carbonized wax oil is mixed with the light fraction obtained by material fractionation to carry out hydrofining and hydrocracking reaction, hydrogenated naphtha obtained by hydrocracking carries out catalytic reforming-aromatics extraction to obtain benzene, toluol, xylene, solvent oil and other products. Compared with the prior art, gasoline fraction and diesel oil fraction obtained by the inventive method are clean and stable in properties. In addition, the invention can produce a plurality of chemical products with high added value, truly realizes the effective utilization of medium and low temperature coal tar, and greatly improves the service life of devices.

The present invention provides a composite powder coating composition obtained by granulating, with a liquid binder, a plurality of starting powder coating materials that are different from each other in hue and / or kind of base resin, and drying the granules, the liquid binder being a solution or dispersion of a binder compound having a softening temperature of 30 to 200° C. and containing a self-crosslinkable functional group or groups and / or a functional group or groups that complementarily react with functional groups of the starting powder coating materials, in a solvent that does not dissolve the starting powder coating materials; production process therefor; and a method for color-matching a composite powder coating composition, the method comprising the steps of dry blending, for color matching, a plurality of starting powder coating materials having different hues, granulating the resulting blend by adding the above-mentioned liquid binder, and drying the granules.

An optical measurement instrument for living body that comprises: a plurality of light irradiation means for irradiating an object being tested with light; a plurality of light reception means for detecting the light that is irradiated to the object being tested and propagates inside the object being tested; and a calculation unit for calculating hemodynamics of a plurality of factors inside the object being tested from the detection signal detected by the light reception means, wherein the calculation unit comprises: a separation calculation unit for separating a plurality of signals from the detection signals; a selection unit for calculating a correlation coefficient between a plurality of the signals separated to select a signal in which a correlation coefficient is a predetermined value or greater as a noise signal; and a reconstruction calculation unit for reconfiguring the detection signal excluding the noise signal selected by the selection unit.

The invention provides a photosensitive resin pool. The photosensitive resin pool comprises a pool body, an oxygen molecule semipermeable membrane located above a bottom wall in the pool body as well as an air inlet and an air outlet, wherein the area of the oxygen molecule semipermeable membrane accords with that of the bottom wall of the pool body, and a cavity is formed between the oxygen molecule semipermeable membrane and the bottom wall of the pool body; the air inlet and the air outlet are formed in the side wall or the bottom wall of the pool body and communicated with the cavity. Besides, the invention further provides a 3D (three-dimensional) printer adopting the photosensitive resin pool and a printing method. The structures of the photosensitive resin pool and the 3D printer are simple, the printing quality is reliable, and the service life is longer. By means of the method, the starting time, the inflating volume and the air extracting volume of an inflation unit and an air extraction unit are correspondingly adjusted, the semipermeable membrane cannot swell while an oxygen molecule layer is formed on the upper surface of the semipermeable membrane, a print object cannot be easily bonded to the semipermeable membrane and is easy to separate, and the contact surface of the print object and the semipermeable membrane cannot be twisted or deformed.

A dual-rotor motor provided with a stator having a stator core including a yoke, a plurality of teeth and a coil wound around the stator core, an inner rotor and an outer rotor, wherein the stator core includes an annular yoke component forming the yoke, and a plurality of tooth components forming the teeth. The stator core is made by fitting the tooth components individually into the annular yoke component in a manner that one ends of the tooth components protrude from the inner peripheral side of the annular yoke component and the other ends protrude from the outer peripheral side of the annular yoke component.

The invention discloses a method of fabricating biofuel. The steps are as follies: (1). Put oil and fat and alcohol into the reaction kettle for easer interchange polymerization. (2). Distill monohydroxy-alcohol from the reaction mess. (3). Separate the mixed ester and progeny hydrate. (4). Distill the mixed ester and propeny hydrate separately, and get high purity fatty acid ester and high purity propeny hydrate. According to the method, the percentage conversion could be 100%.After certificating under vacuum, the purity of top fatty acid monoester could be above 99%. The method of this invention applied all kinds of refining oil and unrefining oil, and basically has no waste stock, waste water and waste gas. It is a green method for environment.

The invention relates to a titanium-silicon molecular sieve TS-1 catalyst for catalyzing ketone oximation reaction. In order to solve the problems of small particles, difficult separation and reutilization, high synthesis cost, strict and complex requirements in the process of gluing, poor repeatability and stability and the like in the prior art, the invention provides a new titanium-silicon molecular sieve TS-1 catalyst for the catalyzing ketone oximation reaction, which is prepared from the following steps: mixing the titanium-silicon molecular sieve TS-1 with one or more solutions of organic amine, ammonium salt, ammonia water and urea, carrying out crystallization again under the self-generating hydro-thermal pressure, and filtering, washing, drying and roasting to obtain the product. The prepared titanium-silicon molecular sieve TS-1 catalyst has large particles and easy separation and recovery after reaction, can improve the reutilization ratio, is especially suitable for ketone oximation reaction using hydrogen peroxide as an oxidizing agent, and can not produce byproducts, thereby protecting the environment and being beneficial to industrial application.

The invention discloses a ceramic and plastic composite preparing method and an electronic device shell. The preparing method comprises the following steps: a ceramic base body is subject to roughening treatment, and a nanoscale roughened surface is formed; a plastic material is injected to the nanoscale roughened surface, and a composite is formed. The nanoscale roughened surface is formed on thesurface of the ceramic base body, the combination force of the ceramic base body and the plastic material of the composite is greatly improved, during falling, the plastic material and the ceramic base body are not prone to separation, and in addition, the composite is good in waterproof performance.

The invention relates to a method for preparing health-care drink containing the dendrobium. Due to the adoption of the advanced technology for extracting the effective component of the dendrobium by ultrasonic waves, the time for extracting the effective component of the dendrobium is 2 / 3 of the time for extracting the effective component of the dendrobium with the conventional method, the temperature for extracting the effective component of the dendrobium is low, the effective component of the dendrobium is easy to separate and purify, and the nutrients are not easy to destroy. The health-care drink containing the dendrobium is prepared by diluting the extract in purified mineral water and mixing the diluted extract with honey, oligoisomaltose and potassium sorbate, etc. The health-care drink containing the dendrobium has the outstanding efficacy of tonifying the stomach, promoting the fluid, nourishing the yin and reducing the internal heat.

The invention discloses a high-capacity carbon-silicon negative electrode active material and preparation and application methods thereof. The high-capacity carbon-silicon negative electrode active material achieves a specific capacity of 800-1500 mAh / g and is formed by mixing carbon-silicon materials and graphite materials, wherein the carbon-silicon materials are microspherical particles prepared by performing ball milling spray-drying and thermal treatment processes on nanosilicon, crystalline flake graphite, carbon nanotubes and a carbon source, the nanosilicon is dispersed on the surfaceof the crystalline flake graphite, the carbon nanotubes are inserted into pores formed between the carbon nanotubes and the crystalline flake graphite, pyrolytic carbon of the carbon source is coatedon the surface of the nanosilicon and the surface and pores of the spherical particles formed by the nanosilicon, the crystalline flake graphite and the carbon nanotubes; the weight of silicon-carbonmaterials is 25%-80% of the total weight of the high-capacity carbon-silicon negative electrode active material. When uniformly mixed with conducting agent and bonding agent, the high-capacity carbon-silicon negative electrode active material can be coated or deposited onto copper foils, foamed nickel, foamed copper or carbon fiber paper as the negative electrode of a lithium ion battery. The preparation method of the high-capacity carbon-silicon negative electrode active material is simple in process, low in cost, applicable to amplified preparation of long-circulation carbon-silicon materials.

The invention provides a two-stage beveled supersonic speed air inlet lip, relates to the two-stage beveled supersonic speed air inlet lip and belongs to the technical field of supersonic speed air inlet passages. In the two-stage beveled supersonic speed air inlet lip, an air inlet passage bump is arranged on the outer side of a machine body; an air inlet passage bump compression surface on the outer side of the air inlet passage bump is relatively provided with an air inlet passage; an outer lip, an inner lip and a lip front edge line are formed at one end, near the air inlet passage bump, of the air inlet passage; supersonic speed incoming flow produces a conical shock wave under the action of the air inlet passage bump compression surface; a positive shock wave is formed in front of an inlet; a first-stage beveled lip is formed on the positive shock wave; a second-stage beveled lip is formed on a position, near the machine body, of the first-stage beveled lip; and the outer lip and the inner lip adopt a quarter transcendental elliptic equation. The two-stage beveled supersonic speed air inlet lip fulfills the aims of realizing application to an isolation passage-free supersonic speed air inlet passage or other forms of supersonic speed air inlet passages, enhancing boundary layer removing effect of the isolation passage-free supersonic speed air inlet passage, enhancing total pressure recovery coefficient of the air inlet passage, reducing outlet flow distortion of the air inlet passage and fixing geometrical and lip two-stage beveling.

The invention discloses an ecological BB fertilizer, relating to a mutifunctional ecological environment friendly compound fertilizer, which is formed by mixing functional urea, controllable slow release sulfurcoated urea, monoammonium phosphate, diammonium phosphate, potassium sulfate particle (or potassium chloride), agricultural magnesium sulfate particle, ammonium sulfate, bio-organic inorganic compound fertilizer, endophytic PASP fertilizer synergist DA-6, plant growth regulator and trace elements. Special ecological BB fertilizer for different plants can be prepared by soil testing formula, according to different farm crops and different soil structure. The ecological BB fertilizer can take effect for 3-120 days, the nutrition release is balanced, biological stress of the farm crop such as drought resistance, cold resistance, salt resistance, or the like can be improved. The product of the invention has great operation significance for increasing yield of grain, reducing production cost, steadily increasing grain production, keeping rural incomes growing, improving utilization rate of the fertilizer, reducing fertilizer waste, protecting ecological environment, guaranteeing farm crop quality and safety, and ensuring sustainable development of the agriculture.

The invention relates to the field of metal powder injection molding, in particular to an adhesive and a method for preparing metal powder injection molding feedstock from the same. The adhesive comprises olefinic thermoplastic elastomers, carnauba wax, commercial paraffin, high-density polyethylene, polypropylene and stearic acid; and the raw materials are mixed in a ratio, extruded, cooled, crushed, and packaged in vacuum to form the qualified feedstock. The metal powder injection molding feedstock prepared from the adhesive is low in manufacturing cost; in the molding process, a liquid phase and a solid phase are hardly separated, and an injection blank is uniform in density; the debonding efficiency is high; and a sintered blank is high in density. The invention overcomes the defect that the traditional metal powder injection molding feedstock is high in cost, widens the application range, and creates greater economic and social benefits.

The invention discloses a titanium-silicon molecular sieve compound catalyst and a preparation method thereof. The method comprises the following steps of: fully mixing a titanium-silicon molecular sieve, an acid molecular sieve, a polymeric monomer polyene-based compound and a pore forming agent; undergoing a polymerization reaction in the presence of an initiator; smashing an obtained lump solid catalyst; adding into a halogenated hydrocarbon for swelling; and extracting and activating with a solvent to obtain a molded titanium-silicon molecular sieve compound catalyst. Due to the adoption of the catalyst obtained in the invention, a corresponding process for preparing a corresponding diol compound by performing alkene epoxidation and undergoing a one-step hydration reaction can be realized, the problem of difficulty in separating titanium-silicon catalyst powder from a reaction solution can be solved simultaneously, and the reaction efficiency is increased. The catalyst is particularly suitable for catalytic reaction processes for preparation of ethylene glycol from ethylene, preparation of 1,2-propylene glycol from ethylene, alkene epoxidation, preparation of alcohol ether by etherification, and the like with a fixed bed process.

The invention discloses a high-fluoride-containing wastewater treatment technology in the fluorine chemical industry. The treatment technology comprises the steps that precipitation is conducted, fluoride-containing wastewater is collected and fed into an adjusting pool, calcium hydroxide slurry is added into the adjusting pool and evenly mixed, the pH value of the adjusting pool is controlled to range from 4 to 6, and standing precipitation is conducted; flocculation is conducted, the wastewater which is treated through the precipitation is introduced into a first flocculation pool, a mixed solution of polyaluminium sulfate and sodium hydroxide is added, the pH value of the first flocculation pool is controlled to range from 7 to 9, solid-liquid separation is conducted after standing is conducted, separated liquid is introduced into a second flocculation pool, a combined flocculating agent of PFC and PAM is added, and standing precipitation is conducted after even mixing is conducted; microfiltration is conducted, and microfiltration is conducted on the wastewater which is treated through the flocculation through a microporous filter; absorption is conducted, the wastewater which is treated through the microfiltration is introduced into an absorption pool, the pH of the wastewater is adjusted to range from 4 to 6, a modified absorbent is added, and standing is conducted after even mixing is conducted. By means of the treatment technology, the fluorine content of the wastewater reaches the effluent standard, and the whole treatment technology is simple, mature, practical, economic and reasonable.

The invention mainly discloses a processing technique of ethyl difluoroacetate, which mainly comprises the following steps of: preparing an intermediate product dichloroacetyl diethylamine through an amination process; carrying out fluorination with anhydrous potassium fluoride and the dichloroacetyl diethylamine as raw material under the action of a solvent and a phase transfer catalyst to prepare difluoro-acetyl diethylamine; and carrying out esterification to prepare the ethyl difluoroacetate. The processing technique of the ethyl difluoroacetate is characterized in that the solvent in the fluorination is sulfolane, and the esterification is a direction reaction of ethanol and the difluoro-acetyl diethylamine. The processing technique of the ethyl difluoroacetate specifically has the advantages of improving the final yield by changing the solvent during the fluorination and improving the production rate by carrying out the direct esterification after the fluorination.

Filter-aid materials are disclosed herein, and processes, systems, and methods using such filter-aid materials for filtering and removing particles and / or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component. Further disclosed herein are filter-aid materials and processes, systems, and methods using such filter-aid materials for filtering and removing particles and / or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component, and wherein the filter-aid material further comprises an at least one additional filtration component mixed with the at least one filterable composite adsorbent.

The invention discloses an antibacterial resin composite material. The antibacterial resin composite material comprises 60-85wt% of resin, 5-30wt% of an antibacterial agent, 5-30wt% of a mildew inhibitor, 3-10wt% of a coupling agent and 2-10wt% of a dispersant. The antibacterial resin composite material has antibacterial and antifungal functions through compounding use of the antibacterial agent and the mildew inhibitor; and the addition of the coupling agent and the dispersant solves the problem of poor compatibility of the antibacterial agent and the mildew inhibitor with resin, so the antibacterial resin composite material has stable properties and is difficult to separate. A preparation method of the composite material comprises the following steps: mixing above formula components of the antibacterial resin composite material, and carrying out melt extrusion. The preparation method has the advantages of simple process, low cost, and suitableness for industrial production.

The invention provides a sound generating device and a preparation method of a metal plastic part. The sound generating device comprises the metal plastic part; the metal plastic part comprises a plastic part body and a metal insert combined with the plastic part body; the surface of the metal insert is provided with an oxidation film layer obtained through metal nanometer treatment and nano-holes located on the surface of the oxidation film layer, and the hole diameter of the nano-holes ranges from 20 nm to 1,000 nm; the nano-holes are filled with a resin composition for preparing the plastic part body. According to the sound generating device and the preparation method of the metal plastic part, the nano-holes are filled with the resin composition from which the plastic part body is prepared, therefore, the purpose that the metal insert and the plastic part body are closely attached to each other is achieved, the adhesive grasping capability of the metal inset is greatly enhanced, and the condition that the metal insert and the plastic part body are separated from each other after being subjected to injection molding is prevented; the length that the metal insert is embedded into the plastic part body is greatly decreased, therefore, ultrasonic energy is smoothly transmitted, the ultrasonic non-melting problem of the metal plastic part is effectively prevented, then the waterproofness and the sealing property of the metal plastic part are improved, and the properties of the sound generating device are improved.

The invention relates to the detection of vitamin D metabolites. In a particular aspect, the invention relates to methods for detecting derivatized vitamin D metabolites by mass spectrometry.

A thermosensitive copolymer may include a first repeating unit having a temperature-sensitive oligomer and a second repeating unit having an ionic moiety and a counter ion to the ionic moiety. The temperature-sensitive oligomer may be an oligomer including a repeating unit derived from a unsaturated monomer with a moiety represented by Chemical Formula 1 or Chemical Formula 2, or an oligomer including a repeating unit derived from a heterocyclic compound having C, N, O, and a C═N bond in its ring.*-C(═O)N(R2)(R3)  [Chemical Formula 1]R2 and R3 may each independently be hydrogen or a linear or branched C1 to C6 alkyl group, a C3 to C7 cycloalkyl group, or a C6 to C10 aryl group, R2 and R3 may not both be hydrogen, and R2 and R3 may be combined to form a nitrogen containing heterocycle.R4 may be a C2 to C5 alkylene group.

The invention relates to a preparation method which can effectively eliminate odor ingredients (mainly aldehydes compounds) in TCPP (Tris(Chloroisopropyl)Phosphate). The method is characterized by comprising the following steps of: adding excessive oxidant solution relative to the aldehydes compound for reaction after a TCPP crude product is obtained through reaction, standing, separating liquid, then alkaline washing, water washing and distilling. The aldehyde compound which has favorable compatibility with the TCPP and is not separated easily can be removed, the aldehyde content in the TCPP is reduced to below 10 ppm from the previous 100 ppm or more and can be reduced to 0.7 ppm in the maximum degree, the odor of the TCPP and the prepared product is less, and the mild odor of the TCPP flame retardant is realized; and oxidant aqueous solution converting aldehyde into acid is added to react, wash and remove the odor, the method has convenient operation as well as simple, convenient and easy implementation, is beneficial to operation in production and does not affect the TCPP yield (the yield can increase by 0.5-1%) and an acid value compared with the previous patents; the aldehyde content can be reduced to a lower degree, and the obtained TCPP product is more stable.

The invention discloses an efficient slow-release urea. The efficient slow-release urea is prepared by coating urea by utilizing a coating slow-release solution and drying and solidifying the coated urea, wherein the coating slow-release solution consists of the following components in percentage by mass: 1 to 5 percent of gamma-polyglutamic acid, 1 to 5 percent of nitration inhibitor, 0.5 to 5 percent of adhesive, 0.05 to 2 percent of surfactant and the balance of water; and the pH of the efficient slow-release urea is 5.5 to 6.5. The invention also discloses the preparation method of the efficient slow-release urea. The gamma-polyglutamic acid in the efficient slow-release urea has the effects of coating and chelating the urea and the nitration inhibitor, so that separation of the nitration inhibitor and a nitrogen fertilizer is reduced, leaching and runoff losses of nitrate nitrogen are reduced, one-time fertilization can be realized, top dressing is not required, the utilization rate of the fertilizer can be improved by over 15 percent, and the yield of the crops is increased by 10 to 30 percent.