72results about How to "Applicable preparation" patented technology

The invention discloses a preparation method of high-quality glycerin monostearate. The method comprises the steps of reacting hydrogenated palm oil and glycerol under strong base catalysis to generate ester, and carrying out four-stage distillation to obtain high-quality glycerin monostearate. The acid value of the product is reduced to below 0.4, the freezing point is raised to 64-66 DEG C, the quality of the product is improved, and the difficulty of the prior art is overcome. Besides, the problems in the prior art that the pipeline is blocked by slag produced in the distillation process, the production efficiency is lowered, the product quality is reduced, the production is discontinuous and the processing efficiency is low resulting from scaling of an evaporating surface and a condensing surface are solved. Glycerol and hydrogenated palm oil can be recycled, so that the cost is low, the yield is high, the product quality is improved, and the whole processing controllability is high. The high-quality glycerin monostearate is suitable for industrial production.

The invention provides a preparation method of vanadium oxide/carbon nanometer tube composite materials with interpenetrating network structures. The carbon nanometer tubes with good conductivity are adopted for self assembly with single-dimensional vanadium oxide nanometer materials on the nanometer scale, so the carbon nanometer tubes have the effects of conductive bridges between all interwoven single-dimensional vanadium oxide nanometer materials for building interpenetrating network structures under the microcosmic dimensions, and the composite material with the structure can be used as a lithium ion injection material with high capacity and high stability. The method comprises the following preparation processes: using V2O5 collosol prepared by a quenching method as a vanadium source; using the carbon nanometer tubes dressed by sulphuric acid and nitric acid as assembly initiation sources; mixing and stirring the V2O5 collosol and the carbon nanometer tubes for more than 1 hour;then taking the reaction for 1 to 7 days through the water heating technology at 150 to 190 DEG C; washing and filtering obtained materials by deionized water for 2 to 5 times; and baking materials at 60 to 100 DEG C for obtaining the vanadium oxide/carbon nanometer tube composite materials with the interpenetrating network structures. The composite material has wide application when being used as the lithium ion injection material in the fields such as secondary lithium ion batteries, electrochromic devices, photoelectric switches, catalysis and sensors and the like.

The invention discloses a method for preparing a titanium alloy through high-speed pressing formation. The method comprises the following steps of: mixing titanium-containing metal powder, lubricating a die wall, preparing a pressed shape through high-speed pressing formation, and performing vacuum sintering. The high-compactness titanium alloy is prepared through high-speed pressing formation and vacuum sintering; the process is simple; and the short-flow and low-cost preparation of the high-performance titanium alloy is realized. The compactness of the prepared titanium alloy is more than or equal to 98.08 percent; the Vickers hardness (HV) is 374 to 394; and the bending strength is 1,439 to 2,170MPa. The method is also applicable to the preparation of other titanium alloys and titanium-based composite materials in which titanium is taken as a matrix.

The invention relates to a TNZS alloy and particularly relates to a method for compounding and preparing high-elastic-modulus Ti-based material based on nano ceramic particles. The method comprises the following steps: firstly taking Ti, Nb, Zr, Sn, TiO2 and HA powder as raw material, carrying out high-energy ball milling twice to prepare mixed powder; then carrying out normal die pressing treatment on the mixed powder; and finally vacuum sintering pressed blocks obtained by die pressing without pressure to obtain uniform-surface-component and high-elastic-modulus Ti-based material containing 5wt% of TiO2/TNZS and 5wt% of HA/TNZS. As a preparation method of the Ti-based material, the problem with insufficient elastic modulus of the TNZS alloy can be effectively solved; the preparation process is simple; the application range of the titanium material in the fields of aerospace, traffic transportation and weapon equipment is expanded.

The invention belongs to the field of biomedical polymer materials, and discloses a micro-needle array patch capable of generating gas to take effect quickly and preparation and application thereof. The micro-needle array patch comprises a substrate and a needle tip located on the substrate, the substrate is composed of a biocompatible matrix, the needle tip is mainly composed of the biocompatible matrix and inorganic particles capable of generating gas, and the inorganic particles capable of generating gas are formed on the surface and/or in the biocompatible matrix of the needle tip; the needle tip part of the micro-needle array patch can interact with skin tissue fluid to generate gas during application, rapid dissolution of micro-needles and diffusion of drugs to a corium layer are promoted, and the drugs can be efficiently and rapidly delivered to subcutaneous parts and take effect without the help of external equipment.

The invention discloses a preparation method of a hydrocracking catalyst. The preparation method comprises the following steps: (1) pulping raw material powder of a hydrocracking catalyst carrier component, performing high-temperature and high-speed stirring treatment while pulping, filtering, and drying a filter cake, wherein the hydrocracking catalyst carrier component comprises a molecular sieve, and further comprises at least one of aluminum oxide, amorphous aluminium silicon, amorphous magnesium silicon and clay; (2) shaping the dried material, drying, roasting for activating, and preparing into a catalyst carrier; (3) loading a hydrogenating active component by an impregnation method to obtain the hydrocracking catalyst. Compared with the prior art, the preparation method of the hydrocracking catalyst has the advantage as follows: by the preparation method, a synergistic effect between different components can be further promoted, so that the using performance of the catalyst is improved.

The invention relates to a surface multi-scale structure tungsten material and a preparation method of the material, and belongs to the technical field of metal surface treatment. A gradient layer isarranged between the surface structure of the surface multi-scale structure tungsten material and the matrix structure, the grain size of the gradient layer is changed in a gradient mode, and the gradient layer from the surface structure to the matrix structure sequentially comprises a nano-layer, a sub-micron layer and a micro-layer, wherein the grain sizes of the nano-layer, the sub-micron layerand the micron layer are in a nanometer level, a sub-micron level and a micron level respectively. According to the surface multi-scale structure tungsten material, binding between the scale layers is good, no obvious interface exists, and micro-cracking, delamination and other phenomena are avoided. The method is easy and quick to use and suitable for preparing bulk samples.

The invention discloses a high-concentration erbium ion doped tellurium tungstate glass capable of emitting light at mid-infrared 2.7 microns. The glass comprises the following components by molar percent: 58-70% of TeO2, 15-25% of WO3, 0-15% of La2O3, 0-15% of LaF3 and 2-4% of Er2O3. The glass is prepared by adopting an electric furnace melting method of a corundum crucible and a silicon carbide rod. The glass is high in doping concentration of erbium ion, high in infrared transmittance near to the mid-infrared 2.7 microns and good in physicochemical properties; and the stability parameter delta T is not less than 180 DEG C. Strong mid-infrared 2.7 microns fluorescence is obtained under pumping of a laser diode with a wavelength of 980 nm; and the glass is suitable for preparation and application of erbium ion doped special glass and optical fiber materials capable of emitting light at mid-infrared 2.7 microns.

The invention discloses a micron macromolecular particle based on a low eutectic solvent emulsion and a preparation method thereof. A low eutectic solvent is a continuous phase and a macromolecular solution is a dispersed phase. The low eutectic solvent is a low eutectic solvent prepared with choline chloride as a hydrogen bond acceptor and DL-malic acid as a hydrogen bond donor; the macromoleculeis polymethyl methacrylate or a poly(lactic acid)-hydroxyacetic acid copolymer. The novel green solvent-low eutectic solvent is used as the continuous phase of the emulsion, a surfactant does not need to be used, the raw materials are cheap and easy to obtain, and the method is simple and has low toxicity and environmental protection. Through selection of an antisolvent, an 'anhydrous' method canbe extended, and is especially suitable for preparation of macromolecular microcapsules of unstable drugs in water.

The invention discloses a method for removing a solvent from polyethylene fiber. The method comprises the following steps of: a) extruding polyethylene fiber; and b) extracting the solvent in the polyethylene fiber extruded in the step a). The invention also discloses a process for producing the polyethylene fiber by utilizing the method and the polyethylene fiber prepared by the method. The invention also discloses a device for removing the solvent in the polyethylene fiber; and the device comprises two or more rolls, wherein two rolls can be contacted under a certain pressure. Compared with the prior art, the method for removing the solvent in the polyethylene fiber, the device for removing the solvent in the polyethylene fiber and the process for producing the polyethylene fiber have the advantages of saving an extracting agent and improving extracting efficiency, and are particularly used for preparing the polyethylene fiber.

The invention relates to bactrocera minax sex pheromone, and an extraction method and an application thereof. A main active component of the bactrocera minax sex pheromone provided by the invention is undecanol. The extraction method of the bactrocera minax sex pheromone comprises the steps of immersing bactrocera minax sex pheromone in a mating season in ethyl ether for 20 s-300 s; analyzing by using a gas chromatography-mass spectrometer to obtain chemical components of an extract liquid; and determining activities of the chemical components in the extract liquid by using a Y-type olfactometer. The bactrocera minax sex pheromone provided by the invention can be used as a sex attractant for monitoring field occurrence conditions of the bactrocera minax and disturbing mating of the bactrocera minax by mating disruption, and can be used as an attractant to trap and kill the bactrocera minax. The extraction method of the bactrocera minax sex pheromone is simple in operations, high in reproducibility and small in required bactrocera minax amount. Besides, a preparation period is short and result reliability is high.

The invention discloses a method for transforming N-cyanomethyl bis(trifluoromethyl) nicotinamide into flonicamide. A transforming reagent is adopted, so that transformation rate of transforming the N-cyanomethyl bis(trifluoromethyl) nicotinamide into the flonicamide is 98.1-99.8%, and purity is 97.1-99.5%. The invention also provides application of the method for transforming the N-cyanomethyl bis(trifluoromethyl) nicotinamide into the flonicamide, not only impurities can be transformed into the flonicamide with pharmaceutical value, but also the impurities produced in a transformation process can be recycled, so that the final yield of the flonicamide is 69.59-75.83%, and the method is more applicable to industrial production. The method disclosed by the invention is applicable to preparation of the flonicamide.

The invention discloses a preparation method of nanometer sheet-shaped zinc phosphate. The preparation method comprises 1, dissolving zinc oxide, 2, preparing a nanometer sheet-shaped zinc phosphate precursor and 3, preparing nanometer sheet-shaped zinc phosphate. The nanometer sheet-shaped zinc phosphate has an obvious lamellar structure and no obvious agglomeration. The nanometer sheet-shaped zinc phosphate is used in paint, produces labyrinth effects, increases water transmission paths and prolongs a coating service life. The preparation method has simple requirements on experiment conditions, utilizes the raw materials with a wide source, realizes recovery and recycle of a waste liquid, saves an economic cost and has environmental protection benefits. The preparation method is suitable for preparation and production of the nanometer sheet-shaped zinc phosphate.

The invention relates to a method for preparing La-Mg-Ni based AB3 type hydrogen storage alloy by magnetic field sintering, which belongs to the technical field of metallic functional material and powder metallurgy. The method mainly comprises the following steps: firstly, mixing La and Mg metal powder or master alloy La2Mg prepared by a molten salt method with one or two of Ni powder, Co powder or Cu powder according to the atom molar mass proportion of AB3, and pre-ball milling the mixture by adopting proper technology; secondly, pressing the milled and mixed raw material powder under a pressure of between 200 and 500MPa into a cake of Phi 15mmx(3-5)mm, putting the cake into a self-made high-pressure reaction kettle and filling 0.5MPa argon after repeated vacuum pumping; and finally putting the high-pressure kettle into a steady high magnetic field of between 1 and 8T and heating to between 610 and 850 DEG C, sintering the cake and slowly reducing the temperature to obtain the La-Mg-Ni based AB3 type hydrogen storage alloy. The material prepared by the method has the advantages of high activity, even compositions, low impurity content and the like. Electrochemistry and PCT tests find that the hydrogen storage material has high capacity and better comprehensive performance.

The invention relates to a preparation process for a polypropylene composite film based on a bio-based wheat straw. The preparation process comprises the following steps of conveying crushed straw particles to a neutralizing and cleaning tank; neutralizing and cleaning the straw particles in the neutralizing and cleaning tank; making the straw particles stand in a hydrothermal reactor at constanttemperature; drying the straw particles through a vacuum drying box; mixing the straw particles with raw materials through a mixing machine; and outputting the materials to a film making machine through a screw extruder for film production. According to the preparation process, a central control unit is connected with a corresponding component, a matrix Ri is established according to the comparison result of the straw mass Ma and each value in the Ma0 matrix so as to control each device to select a corresponding operation parameter, and a matrix Sj is established according to the comparison result of the straw particle mass Mb and each value in the Mb0 matrix so as to select the amount of the corresponding raw materials and a preparation process. High-quality composite materials can be rapidly prepared while it is ensured that the content of straw particles is within a preset range, and the preparation efficiency of the process is improved.

The invention relates to a method for drying a lithium ion battery cell before liquid injection. The method comprises the steps of converting liquid inert gas into gaseous inert gas, and then carryingout temperature rising operation to obtain the gaseous inert gas with a drying working temperature; putting the lithium ion battery cell into a drying box group, and carrying out first vacuumizing operation on the drying box group; introducing the gaseous inert gas with the drying working temperature into the drying box group, and carrying out circulating aeration drying operation; next, carryingout second vacuumizing operation on the drying box group, when the dew point in the drying box group is higher than the target dew point value, circularly executing the circulating aeration drying operation and the second vacuumizing operation, and compensating and heating the gaseous inert gas; stopping executing the circulating aeration drying operation and the second vacuumizing operation whenthe dew point in the drying box group is lower than or equal to the target dew point value; and finally, carrying out the circulating aeration cooling operation. Therefore, energy can be saved, the temperature of the drying gas is more stable, and the drying efficiency of the lithium ion battery cell is higher.

The invention discloses a small-site organic fertilizer preparation method. The small-site organic fertilizer preparation method mainly includes the steps of (1), mixing animal dung with straw and/or wheat straw uniformly; (2), adding a phosphate fertilizer or powdered rock phosphate into a mixed material obtained from the step (1), and regulating the moisture content of the mixture; (3) adding facultative anaerobes into the mixture and transferring the mixture into a horizontal pulverizer to make all the materials mixed sufficiently; (4), stacking the mixed materials and conducting heat release, oxygenating, turning and fermenting so as to obtain organic fertilizer. The small-site organic fertilizer preparation method is saving in space and applicable to small sites. The organic fertilizer prepared by the method is high in organic matter content, free of stink and capable of decreasing occurrence rate of pest and disease damage after application and improving soil properties.

The invention discloses a preparation method of cubic phase silicon carbide micron particles, belongs to the technical field of silicon carbide preparation and semiconductor material preparation, and aims to solve the problems of high cost, high reaction temperature, difficulty in process control, complex process, low yield, lower purity and non-uniform particle size distribution in the existing preparation of cubic phase silicon carbide powder. The method comprises the following steps: treating silicon dioxide microspheres in a hydrogen peroxide solution to obtain activated silicon source particles; and introducing a gas carbon source in the presence of inert gas for high-temperature treatment, and removing impurities to obtain the zirconium acetylacetonate-loaded silicon dioxide microspheres. The cobalt acetylacetonate is used as a shape regulator, the silicon dioxide microspheres are used as a shape template, and the gaseous carbon source interacts with one another, so that the supersaturated linear growth of silicon carbide is effectively inhibited, and the morphology and the particle size of spherical particles are controlled. The method is simple, moderate in temperature, easy to control, high in production efficiency, high in product purity and uniform in particle size distribution. The method is suitable for preparing the micron-sized cubic phase silicon carbide particles.