34results about How to "Rapid crystallization" patented technology

The invention relates to a method for synthesizing a monodisperse samarium-doped rare earth cerium oxide nanocrystal, belonging to the functional material preparation technical field. The method comprises the following steps: firstly, preparing an aqueous phase solution by using soluble cerium nitrate and samarium nitrate as raw materials and carbamide as a precipitant; forming an inverse microemulsion by using cetyl-trimethyl ammonium bromide as a surfactant, normal butyl alcohol as a cosurfactant and normal octane as an oil phase and adding the aqueous phase solution; filling the inverse microemulsion into a high-pressure reaction kettle the inner lining of which is made of polytetrafluoroethylene, heating for reaction, removing the normal octane from the reaction product by centrifugal separation, and removing the cetyl-trimethyl ammonium bromide and the normal butyl alcohol by washing to obtain a precursor product; and carrying out light irradiation on the precursor product to obtain the shape-controllable crystallized synthesized monodisperse samarium-doped rare earth cerium oxide nanocrystal which is uniform in particle size.

The invention discloses a method for preparation of a high-purity fatty acyl amino acid salt, wherein the method includes the following steps: a) carrying out a reaction of amino acid with fatty acyl chloride, neutralizing released hydrochloric acid with an alkaline substance, and generating a fatty acyl amino acid salt crude product; b) adding a solvent to the crude product, heating to dissolve and dispersing to obtain a solution, and adjusting the pH value of the solution; c) placing the solution on an ultrasonic apparatus, slowly cooling to 20-25 DEG C, carrying out ultrasonic crystallization of the solution for the first time, and separating through reduced pressure suction filtration, to obtain a filter cake for standby application; and d) adding a solvent to the filter cake obtained in the former step, heating to dissolve and dispersing to obtain a solution, carrying out ultrasonic crystallization for the second time, separating through reduced pressure suction filtration, to obtain a filter cake, carrying out vacuum drying of the filter cake, and thus obtaining the high-purity fatty acyl amino acid salt finished product. The high-purity fatty acyl amino acid salt having less impurity residue, good crystal shape and uniform granularity can be obtained by using the method; the method has the advantages of reasonable process, easy operation, high production efficiency, good production preparation reproducibility, and stable product quality.

The invention provides a manufacturing method for low-temperature polycrystalline silicon and a manufacturing method for a TFT substrate. The manufacturing method for the low-temperature polycrystalline silicon includes the following steps that S1, a substrate (1) is provided; S2, a buffering layer (2) is deposited on the substrate (1); S3, a metal mesh film (3) is plated on the buffering layer (2); S4, an amorphous silicon layer (4) is deposited on the metal mesh film (3); S5, rapid thermal annealing is carried out on the amorphous silicon layer (4), and therefore the amorphous silicon layer (4) is crystallized and converted into a polycrystalline silicon layer (5); S6, the metal mesh film (3) is removed. The method can effectively reduce the temperature of the crystallization manufacture procedure, shorten the time for the crystallization manufacture procedure, reduce the cost for preparing polycrystalline silicon thin films in a large-area mode, improve the crystallization effect and make crystalline grains larger and more uniform.

The invention provides a method for carrying out solvent-out crystallization on allopurinol. The method comprises the following steps: (1) dissolving a crude allopurinol product into a sulfones solvent at the temperature of 98-148 DEG C; (2) adding a solution obtained from the step (1) to an antisolvent for crystallization, and separating to obtain the allopurinol. The finished allopurinol product obtained through the method provided by the invention can achieve the yield as high as 95% or more than 95% and achieve the purity more than 99.88% of the purity achieved through an HPLC normalization method. The method provided by the invention has the advantages of simple process, small occupied equipment size, output increase of equipment with same size, solvent recycling, environmental pollution reduction and suitability for industrialized production.

The invention provides a preparation method of a europium oxide (EUO) type molecular sieve. The preparation process comprises the steps: adding one or more of ethanol, propylene glycol, methyl alcohol and acetone with a proper amount to be taken as an organic solvent; filling a high-pressure inert gas into a high-pressure kettle, and carrying out sectional type crystallization under a certain condition; filtering and washing the product to be neutral; and drying, roasting to obtain the EUO molecular sieve. The organic solvent is added, so that a template agent precursor is promoted to be dissolved in an aqueous phase, and the generation of a template agent is accelerated; and therefore, the crystallization speed of the molecular sieve is accelerated, and the crystallization time of the molecular sieve is remarkably shortened.

The invention discloses a method for preparing a zeolite molecular sieve through quick crystallization of dry glue, and relates to the field of molecular sieve solid phase synthesis. The method specifically comprises the following steps: adding an aluminum source and a fluoride into a silicon-aluminum type molecular sieve mother solution for crystallizing to obtain a silicon-aluminum type molecular sieve guiding agent; adding an alkali source, a silicon source, a template agent R and deionized water into the silicon-aluminum type molecular sieve guiding agent, uniformly carrying out mixing, and then carrying out drying to obtain dry glue powder; and crystallizing the dry glue powder in a steam atmosphere in a continuous crystallization kettle to obtain the zeolite molecular sieve, whereinthe crystallization time is 2-10 hours. The guiding agent disclosed by the invention is obtained by secondary crystallization, and is high in activity and strong in guiding action, so that the usage amount of the template agent can be reduced, crystallinity can be improved, generation of hybrid crystal phases formed by solid-phase synthesis is avoided, and the crystallization period is shortened.The continuous crystallization kettle can be used for continuous production without need of cooling and pressure relief, so that the required crystallization time is short, and efficiency and yield are high. The prepared zeolite molecular sieve is good in stability, high in crystallinity and high in silicon-aluminum ratio.

The invention relates to a synthetic method of an MWW structured Si / B molecular sieve and mainly solves problems of severe toxicity of a template or complex preparation in the prior art. The synthetic method provided by the invention comprises the following steps: mixing a boron source, a silicon source, alkaline MOH, a template R and water, wherein the mol ratio of the mixture is B2O3:SiO2:OH-:R:H2O=(0.01-1.00):1:(0.02-0.30):(0.01-0.50):(5-50); carrying out hydrothermal crystallization on the above mixture at the temperature of 100-200 DEG C for 1-10 days; separating, washing and drying to obtain the MWW structured Si / B molecular sieve, wherein the template R is diethyldimethylammonium hydroxide. The technical scheme can be applied in industrial production of the MWW structured Si / B molecular sieve.

The invention relates to a preparation method for cefazedone sodium with low water content. The method includes the following steps: performing salifying: placing cefazedone and sodium methoxide into dried methyl alcohol for a salifying reaction, and cooling a reaction solution to 10-30DEG C when the cefazedone is completely dissolved; decoloration: adding activated carbon into the reaction solution, stirring for decoloration, filtering out the activated carbon, and then performing ultrafiltration; crystallization; and drying: filtering and washing filter cake to obtain the cefazedone sodium with low water content. According to the method, the cefazedone and sodium methoxide are placed into the dried methyl alcohol for the salifying reaction so as to obtain cefazedone sodium with low water content, and simultaneously, ultrafiltration and ultrasonic crystallization technologies are adopted to produce the cefazedone sodium which is low in water content, few in impurities, uniform in particles, good in liquidity and high in stability.

The invention discloses a coating device for semiconductor production that prevents deviation. A coating device for semiconductor production that prevents deviation includes a device main body, a vertical screw rod, a connecting sleeve, a first rotating shaft, a slot, and a second coating device, a second rotating shaft, a second gear, a first threaded mandrel, a first bearing, a rotating turntable, semiconductors to be processed and fan blades. The upper end of the main body of the device is provided with a first motor. The fixing device provided in the semiconductor production coating device for preventing deviation, artificially turns the knob on the fixing device to make the second screw mandrel rotate, and the second screw mandrel is threadedly connected with the first clamping block, so that the first screw mandrel is screwed. The clamping block moves on the horizontal plane, driving the sliding block to move on the slide rail, so as to facilitate the adjustment of the position of the first clamping block. By adjusting the position of the first clamping block, it is convenient to adjust the distance between the first clamping block and the second clamping block, so that Clamp the semiconductor to be processed to prevent the semiconductor to be processed from shifting.

The invention discloses a method for preparing a zeolite molecular sieve through quick crystallization of dry glue, and relates to the field of molecular sieve solid phase synthesis. The method specifically comprises the following steps: adding an aluminum source and a fluoride into a silicon-aluminum type molecular sieve mother solution for crystallizing to obtain a silicon-aluminum type molecular sieve guiding agent; adding an alkali source, a silicon source, a template agent R and deionized water into the silicon-aluminum type molecular sieve guiding agent, uniformly carrying out mixing, and then carrying out drying to obtain dry glue powder; and crystallizing the dry glue powder in a steam atmosphere in a continuous crystallization kettle to obtain the zeolite molecular sieve, whereinthe crystallization time is 2-10 hours. The guiding agent disclosed by the invention is obtained by secondary crystallization, and is high in activity and strong in guiding action, so that the usage amount of the template agent can be reduced, crystallinity can be improved, generation of hybrid crystal phases formed by solid-phase synthesis is avoided, and the crystallization period is shortened.The continuous crystallization kettle can be used for continuous production without need of cooling and pressure relief, so that the required crystallization time is short, and efficiency and yield are high. The prepared zeolite molecular sieve is good in stability, high in crystallinity and high in silicon-aluminum ratio.

The present invention is to provide a method for separating and extracting battery-grade lithium carbonate and rubidium and cesium salts from lepidolite, using lepidolite as a raw material and adopting an acidizing roasting method, which includes crushing, feeding and pulping, acidizing leaching, mixing, drying , acidizing roasting, water immersion reaction, two cooling crystallization, adding alkali to neutralize and separate gypsum solid slag, adding impurity remover to remove impurities, evaporating concentration and preparing crude lithium carbonate and rubidium, cesium vanadium salts, etc., greatly reducing the comprehensive extraction of lepidolite The method of preparing battery-grade lithium carbonate and rubidium and cesium salts with high equipment utilization rate, low environmental protection three waste discharge and low production cost.

The invention discloses master batches for production of polyester filaments, and a preparation method and application thereof. The problems that the traditional regenerated master batches cannot havethe characteristics of properties close to those of the original master batches and low cost are solved. According to the key point of the technical scheme, the master batches comprise the followingcomponents in parts by weight: 60 to 70 parts of waste plastic bottle sections, 10 to 40 parts of original master batches, 1 to 3 parts of defoaming master batches, 1 to 5 parts of compatibilizer and0.1 to 1 part of accelerant. The master batches prepared by the above formula have low cost, have excellent properties close to those of the original master batches, can be compatible with the waste plastic bottle sections well in the production of the polyester filaments and enables the polyester filaments to be uniform in character and color.

A porous calcium silicate filter material used in water treatment is made from coagulation, steam foaming and high-temperature high-pressure steam treatment, characterized in that it uses domestic powder quartz (SiO2), general silicate cement, powder calcium oxide (CaO), power calcium sulfate (CaSO4), and aluminum powder (Al). The inventive product has strong adsorption and decomposition on organic, phosphor, and nitrogen, to be used in small life sewage treatment system.

A method for recovering nickel sulfate from copper smelting high-impurity and high-nickel anode copper plate, the method is cast into high-impurity high-nickel anode copper plate after refining copper smelting high-impurity high-nickel anode copper plate, electrolyzing high-impurity high-nickel anode copper plate, recycling Filtration of the electrolyte, purification and removal of impurities on the electrolyte, deep recovery of nickel sulfate, cleaning of the nickel sulfate crystallization tank, and treatment of nickel anode slime, etc., have realized the recovery of nickel sulfate from high-impurity and high-nickel anode copper plates in copper smelting with high efficiency. The process The operation is simple, the environment of the operation site is clean and hygienic, the electrolytic refining system has a strong adaptability to high-impurity raw materials, the waste electrolyte has a large de-impurity treatment capacity, and the quality of the cathode copper product and the electrolysis efficiency are taken into account.

The invention relates to a method for synthesizing a monodisperse samarium-doped rare earth cerium oxide nanocrystal, belonging to the functional material preparation technical field. The method comprises the following steps: firstly, preparing an aqueous phase solution by using soluble cerium nitrate and samarium nitrate as raw materials and carbamide as a precipitant; forming an inverse microemulsion by using cetyl-trimethyl ammonium bromide as a surfactant, normal butyl alcohol as a cosurfactant and normal octane as an oil phase and adding the aqueous phase solution; filling the inverse microemulsion into a high-pressure reaction kettle the inner lining of which is made of polytetrafluoroethylene, heating for reaction, removing the normal octane from the reaction product by centrifugalseparation, and removing the cetyl-trimethyl ammonium bromide and the normal butyl alcohol by washing to obtain a precursor product; and carrying out light irradiation on the precursor product to obtain the shape-controllable crystallized synthesized monodisperse samarium-doped rare earth cerium oxide nanocrystal which is uniform in particle size.

The invention discloses a directional drawing discharging type vacuum melting furnace. The directional drawing discharging type vacuum melting furnace comprises a furnace body with a vacuum suction port, wherein a crucible is arranged in the furnace body, induction heating coils are located outside the crucible, a pushing device with the output end facing upwards is arranged on the bottom surfaceof the interior of the furnace body, the output end of the pushing device is in contact with the bottom of the crucible, and discharge pipes penetrating through the crucible are arranged at the bottomof the crucible; drawing rods are arranged in the discharge pipes, a crystallization chamber is arranged below the furnace body, and water cooling boxes are arranged on the top surface of the interior of the crystallization chamber; the discharge pipes penetrate through the water cooling boxes, and the bottom ends of the discharge pipes penetrate through the crystallization chamber from the bottom surface of the crystallization chamber; crystallization heads are fixedly connected to the tops of the drawing rods, the crystallization heads are small upper-small and lower-big cones, and spiral grooves are formed in the surfaces of the crystallization heads; the directional drawing discharging type vacuum melting furnace further comprises isolation blocks located inside the furnace body, andthe crucible is placed on the isolation blocks. According to the directional drawing discharging type vacuum melting furnace, the problem that industrial silicon often needs secondary molding in use in the prior art is solved, and the purposes that one molding is carried out, secondary molding is not required, and the cost is reduced are realized.

The invention relates to a preparation technology for water-soluble resveratrol particles. The preparation technology is that: (1) resveratrol transparent solution is prepared; (2) the prepared resveratrol transparent solution is pumped to the crystallizing kettle of a supercritical fluid crystallizing device; (3) residual chemical solution in a pipeline is flushed after chemical solution is fed; and (4) a pump is shut down, pressure and temperature are regulated to the natural state and the obtained particles are water-soluble resveratrol particles. The diameter of the water-soluble resveratrol particles is 50nm-200nm. X-ray diffraction shows that the particles are in the indefinite state. The water-soluble resveratrol particles can be used in medicines, healthcare foods, feeds, food additives, cosmetics and the chemical field. The invention has the advantages that the nature of indissoluble resveratrol is changed, the water solubility of the resveratrol is obviously improved and the dissolution speed in water is very fast; and since the resveratrol is rapidly precipitated in the supercritical fluid, the finished product is enabled to be loose and the dissolution speed in water is very fast.

The invention relates to a preparation method of spinel lithium manganate. The preparation method comprises the following steps: uniformly mixing lithium or manganese acetate or nitrate, then heatingunder the temperature of 102-108 DEG C, and treating for 5-30 minutes in a microwave oven under microwave power of 360-900W and microwave power density of 90-250W / m<2> to obtain spinel lithium manganate. Through application of the inside heating characteristic of microwave heating, the whole system reaches the ignition temperature simultaneously; the system rapidly carries out spontaneous combustion to release high heat; lithium manganate can be rapidly crystallized and shaped by means of the heat released by the combustion reaction; through microwave heating, the reaction time is greatly reduced, and a large amount of energy consumption is reduced; meanwhile, the method is simple in process and low in cost, is suitable for popularization, and can achieve efficient industrial mass production of lithium manganate.

The invention discloses a high-reliability phase-change material, which is a superlattice-like phase-change material layer formed by cyclically and alternately stacking a first phase-change material layer and a second phase-change material layer. The first phase-change material layer A superlattice-like interface is formed between the material layer and the second phase-change material layer, and the first phase-change material layer is Sb 2 Te 3 As an induction layer, the second phase change material layer is Ge 15 Te 85 , there are at least three layers of alternating overlapping layers. Amorphous Sb 2 Te 3 The crystallization of the layer requires low energy and is easy to form a stable lattice orientation, so the selected Sb2Te3 layer can be used as an induction layer to make the amorphous Ge 15 Te 85 The layer has a higher phase change speed during the phase change process, which can promote the rapid crystallization of the entire phase change material; and the selected Ge 15 Te 85 In the energy band structure of the layer, the defect state is mainly located in the local state of the band tail, rather than the defect energy level near the Fermi level in the band gap, and the resistance drift will not occur due to the relaxation of the defect energy level, so in the phase During the transformation process, it has a higher phase transformation speed.