273results about How to "Improve crystallization efficiency" patented technology

The invention relates to a method for the synthesis of a Y-type molecular sieve, which comprises the following steps: (1) making coal-series kaolin and a binder into slurry; (2) spray drying the slurry and making the spray-drying product into microspheres; (3) roasting the microspheres; (4) mixing the microspheres with an alkaline crystallizing solution containing an organic template to crystallize the microspheres under a hydrothermal condition; and (5) obtaining an in-situ crystallization product by filtering and washing. Using the coal-series kaolin as a raw material for the in-situ molecular sieve synthesis, the method expands raw material sources and reduces the production cost of products. And the product of the method is large in specific surface area and high in crystallinity and can be used in reaction processes such as catalytic cracking.

The invention discloses a continuous cooling crystallizer, comprising a crystallization tank and a heat exchanger in the crystallization tank, wherein, the heat exchanger comprises a top-enclosed heat exchange cylinder, a heat exchange pipe fixed in the heat exchange cylinder, a cooling medium inlet pipe and a cooling medium outlet pipe; a hollow shaft vertically passing through the top surface of the crystallization tank and a driving mechanism driving the hollow shaft to rotate are arranged above the crystallization tank, the top end of the hollow shaft is connected with a three-channel rotary joint, the bottom end of the hollow shaft is connected with the enclosed end of the heat exchange cylinder; a material pipe which has a top end communicated with one channel of the three-channel rotary joint and a bottom end passing through the heat exchange cylinder is arranged in the hollow shaft, one ends of the cooling medium inlet pipe and the cooling medium outlet pipe are respectively communicated with the inlet end and outlet end of the heat exchange pipe, and the other ends of the cooling medium inlet pipe and the cooling medium outlet pipe are respectively communicated with the rest two channels of the three-channel rotary joint. The continuous cooling crystallizer is used in a cooled shell-and-tube heat exchanger and arranged in the crystallization tank, rotates at a certain speed when working, and the cooling process and stirring process are combined as a whole, thus the crystallization efficiency is greatly increased.

The invention provides an ammonium rhenate solution crystallization method. The technical scheme of the invention is characterized in that the method comprises the following steps: 1, placing an ammonium rhenate solution having a temperature of 30-90DEG C and a concentration of not less than 15g/L in an open container, wherein the ammonium rhenate solution is obtained after evaporating concentration; 2, adding a substance which can hydrolyze to generate NH4<+> into the ammonium rhenate solution in order to adjust the pH value of the ammonium rhenate solution to 8-11, wherein the substance is ammonia water; 3, blowing the ammonium rhenate solution by a wind source commonly used in the industry in order to cool the ammonium rhenate solution to room temperature, and preliminarily crystallizing the ammonium rhenate solution in the cooling process; 4, cooling the ammonium rhenate solution in an environment having a temperature of -10-0DEG C for above 6h; and 5, taking the ammonium rhenate solution out of the environment, and carrying out solid-liquid separation to obtain crude ammonium rhenate. The ammonium rhenate solution crystallization method has the advantages of crystallization efficiency improvement and ammonium rhenate product output improvement.

The invention relates to the technical field of a high-molecular material, and more specifically relates to a LCP/PBT/PET ternary alloy material and a preparation method thereof. The LCP/PBT/PET ternary alloy material comprises the following raw materials in parts by weight: 10-40 parts of a liquid crystal polymer, 10-40 parts of polybutylene telephthalate, 10-40 parts of polyethylene glycol terephthalate, 5-40 parts of glass fiber, 3-15 parts of a compatilizer, 3-15 parts of a fire retardant, 0.1-0.5 parts of an anti-oxidant, 0.2-2 parts of a lubricant and 1-2 parts of a modifier. The ternary alloy material has the excellent mechanical properties of toughness, impact strength, tensile strength and bending strength, and has the advantages of good fireproof performance, good heat resistance, low water absorption, good size stability, high crystallization efficiency, good moulding performance, good processing performance, low cost, and high usage value.

The invention relates to a vinpocetine special-purpose crystallization pot, which contains a pot rack, a pot and a stirring device. The pot contains a pot body and a cover. The bottom of the pot body is provided with a discharge hatch which is equipped with a discharged valve. A feed inlet is disposed on the cover. The periphery of the pot body is provided with an insulation jacket with a steam inlet and a condensed water outlet. The crystallization pot also contains a condensation coil pipe disposed inside the pot body. The condensation coil pipe is equipped with a condensate liquid inlet and a condensate liquid outlet which extend out through the pot. According to the crystallization pot, the condensation coil pipe is arranged inside the pot. As the condensation coil pipe directly contacts with a material, the heat transfer efficiency is highest, and the material can be rapidly cooled. Therefore, the vinpocetine crystallization rate can be raised and the crystallization efficiency can be improved. In addition, the invention is simple to arrange and convenient to operate.

The invention provides an extraction method of lincomycin. The extraction method mainly comprises the following steps: adjusting acidity of fermentation liquor, filtering by using a ceramic ultrafiltration membrane, then adjusting alkalinity, then filtering by using a ceramic ultrafiltration membrane again, then carrying out primary sec-octyl alcohol extraction and hydrochloric acid back-extraction, adjusting alkalinity of the primary back extraction liquor and then filtering by using a ceramic ultrafiltration membrane again; carrying out secondary sec-octyl alcohol extraction and hydrochloric acid back-extraction and adding acetone to the secondary back extraction liquor to carry out evaporative crystallization. According to the extraction method provided by the invention, the yield of the lincomycin is high, the color grade of the lincomycin can be improved, and the B component content in the lincomycin is reduced. According to the extraction method of the lincomycin, the feed liquid quality of other extraction technologies can be improved by a membrane treatment process, the integral extraction efficiency is further improved, the residual volume of sec-octyl in raffinate in the extraction procedure is reduced, the product quality is improved, and meanwhile, the COD (Chemical Oxygen Demand) in produced wastewater is reduced. The extraction method has certain economic benefit and environmental benefit.

The invention discloses a preparation method for growing perovskite single crystals by liquid-phase diffusion separation crystallization at the room temperature. The preparation method comprises the following steps of (1) preparing a saturated perovskite precursor solution; (2) adding dimethylsilicone oil into the precursor solution, and forming a liquid seal on a perovskite solution by the dimethylsilicone oil; and (3) forming perovskite crystals by heating. The dimethylsilicone oil is insoluble with a solvent in the precursor solution; and a density relationship is that the solvent of the perovskite precursor solution is less than the dimethylsilicone oil and the dimethylsilicone oil is less than the perovskite precursor solution. According to different reactants, two-dimensional or three-dimensional perovskite single crystals can be prepared, the single crystals can be obtained at the room temperature, and the crystal quality is higher. The method is prepared in a lower-temperatureenvironment, nucleation is less, the crystal quality is higher, and defects are fewer. The perovskite single crystals have good application prospects in the photoelectric field, and the high-efficiency and simple preparation method has great potential for commercial application of the single crystals.

The invention relates to an MVR (Mechanical Vapor Recompression) continuous evaporating crystallizing system. The system comprises a raw material inlet, a water compensating inlet, a preheater, a climbing film evaporator, an air-liquid separator, a compressor, a pipeline heater, a crystallizing separator and four control circuits; an inlet, a first outlet, a second outlet and a third outlet are formed in the air-liquid separator; the preheater is connected with the climbing film evaporator through a pipeline; the climbing film evaporator is connected with the inlet of the air-liquid separator; the compressor is connected between the air-liquid separator and the climbing film evaporator through a steam conveying pipeline; a circulating evaporator is connected between the second outlet and the inlet; cooing water subjected to heat exchange through the climbing film evaporator and cooling water subjected to heat exchange through the circulating evaporator are treated as heat sources of the preheater; the cooling water output end of the preheater and the water supplementing inlet are used for compensating water to the system together; the crystallizing separator is connected with the third outlet of the air-liquid separator; the four control circuits are arranged in the system. The system has optimal and stable parameters, achieves water saving, energy saving and raw-material saving effects and also has a good crystallizing effect.

The invention provides a process for concentrating titanium white waste acid through generation of crystalline hydrate by utilizing the phase equilibrium principle. According to the process, ferrous sulfate, copper sulfate or other sulfate capable of forming crystalline hydrates are added into titanium white waste acid, the phase equilibrium process is controlled by utilizing the equilibrium relationship among sulfuric acid, water and sulfate, moisture is brought out by generating sulfate hydrates containing different crystal water and crystallizing and separating the sulfate hydrate from diluted sulfuric acid, and the diluted sulfuric acid can be concentrated; and the separated ferrous sulfate and other crystalline hydrates can be recycled after being dried to remove crystal water; different concentration degrees can be realized by controlling the mode of generated crystalline hydrate and can be adjusted according to requirement, and a concentrated sulfuric acid product having an acidconcentration of higher than 60 percent can be obtained; and anhydrous ferrous sulfate and other sulfates capable of forming crystalline hydrate can be utilized as raw materials, and the raw materials have wide sources. The process is simple, has low operation temperature, small equipment investment and weak corrosion, moisture of waste acid is not needed to be directly evaporated, energy consumption is low, and resource utilization of titanium white waste acid can be realized.

The invention provides a refinement method for hydrochloric acid cyclobenzaprine, which is safer and more reliable, and can increase the productive efficiency. The refinement method of the hydrochloric acid cyclobenzaprine is as follows: firstly, coarse products of 5- (3- dlmethyl ammonium)- dibenzanthracene (a,d) cycloheptatriene-5-alcohol(cyclobenzaprine intermediate) are dissolved in hydrochloric acids with the concentration of between 1 and 37 percent and heated at a temperature of between 50 and 95 DEG C for 1 to 5 hours, and added in with sodium hydroxide(or other sodium salts) for neutralization so as to make a solution become basic; secondly, an aether/ethyl acetate mixed solution is used for extraction, and the organic layer is filled with dried hydrochloric acid gases for 1 to 5 hours, and coarse products of cyclobenzaprine hydrochloride are separated out; thirdly, coarse products of cyclobenzaprine hydrochloride are recrystallized by absolute isopropanol, and the use level is that each 10g of coarse products is mixed with 30 to 100ml of absolute isopropanol, and the coarse products are filtered, and filter cakes are washed to be nearly white by using acetone, aether or tetrahydrofuran, and coarse products filtered are dried to obtain finished products of cyclobenzaprine hydrochloride, and the content of hydrochloric acid cyclobenzaprine is more than 99.8 percent.

In a method of manufacturing a crystallized semiconductor device of the present invention, a thermal diffusion layer (1) having higher thermal conductivity than that of a substrate (4) is formed on a surface of a semiconductor layer (2), and then laser light is applied to the semiconductor layer (2) from above the thermal diffusion layer (1). As a result, it becomes possible to manufacture the crystallized semiconductor device in which a crystal is longer than that of a conventional arrangement. According to the present invention, it is possible to provide the crystallized semiconductor device having the semiconductor layer in which the size of the crystal grain is larger than that of the conventional arrangement.

The invention discloses a method for producing crystal maltol, which comprises the following contents: a maltol solution is evaporated and concentrated to be supersaturated to obtain a maltol massecuite; maltol crystal seeds are added to the massecuite and the supersaturation degree and viscosity of the solution are controlled; the maltol massecuite is continuously evaporated and crystallized, the solution maintains boiling and maltol solution is added to continuously; when the grain quantity in the massecuite reaches 50 percent to 90 percent, the massecuite is transferred into a homoiothermal reserve tank and stirred until the temperature thereof is reduced to 20 DEG C to 40 DEG C; and then centrifugal separation is conducted to obtain a finished product of crystal maltol. The method can improve the crystallization efficiency of the maltol and render the grain be even and stable.

The invention discloses a highly flame retardant polypropylene material and a preparation method and applications thereof. The polypropylene material is composed of following raw materials: homo-polymerized polypropylene resin, a beta nucleating agent, a complex composed of a bromine fire retardant and an antioxidant 1010, an antimony fire retardant, a flame retardant synergist, a UV absorbent, anantioxidant, a lubricant, and functional additives. The polypropylene material is characterized in that for each 100 parts by weight of the polypropylene material, the polypropylene material comprises 0.8 to 1.5 parts by weight of antioxidant, and 0.6 to 1.0 part of UV absorbent, the antioxidant is a mixture composed of an antioxidant 168, an antioxidant 3114, and an antioxidant DLTDP; and the UVabsorbent is prepared by compounding hindered amines with benzotriazole. The flame retardant grade of prepared material can reach UL1694 SC-0, the outdoor UV grade is F1, the polypropylene material has the advantages of good insulation performance, good heatproof property, good size stability, and excellent processing and flowing performance, the preparation method is simple and efficient, and the polypropylene material can be used to prepare embedded metal parts, which should be highly flame retardant.

The invention discloses a dehumidifying colorless PET (polyethylene Terephthalate) color master batch which is prepared from the components in percentage by weight as follows: 40-60% of carrier, 1-3% of coloring agent, 1-3% of dispersant, 5-15% of dehumidifying additive and 15-25% of nucleating agent. The invention further discloses a preparation method of the dehumidifying colorless PET color master batch. According to the dehumidifying colorless PET color master batch provided by the invention compared with color master batches marketed with similar functions, the price is more economical, and the production cost of a plastic process is reduced. With the adoption of an integral production mode, the production process is reduced and the energy resources are saved. According to the invention, the structure of PET grains is further changed, so that the crystallizing efficiency is improved, the mechanical performance is increased, the forming period is shortened and the economic benefit of enterprises is improved. According to the invention, novel components are adopted, and the use level of harmful substances is reduced, so that the harmful substances are substantially not volatilized without affecting the health of a human body. The color master batch is suitable for application and use in the manufacturing industry.

The invention discloses a particle size distribution modeling and control method in a crystallization process. The particle size control method in the crystallization process comprises the following steps: establishing an optimal control module of particle size distribution in the crystallization process by taking the average crystal particle size as index for measuring the crystal particle size distribution and combining with crystallization process constraint conditions on the basis of a particle size distribution model in the crystallization process; performing discretization and parameterization processing on particle size control vectors in the crystallization process, to solve the optimal control model of the particle size distribution in the crystallization process, so as to obtainan optimal control curve in the crystallization process, and realize maximization of average particle size of crystals. According to the method, an acquiring method of a control curve in the crystallization process can be improved, and the crystallization efficiency and average crystal particle size can be improved.

The invention provides a device system and preparation technology for preparing a submicron material through a continuous hydrothermal method. The device system comprises burdening kettles, a preheater, a first crystallizer and a second crystallizer. The first burdening kettle is communicated with the first crystallizer through a first feeding pump and the preheater, and the second burdening kettle is communicated with the first crystallizer through a second feeding pump. The first crystallizer is communicated with the second crystallizer, a discharging opening of the second crystallizer is communicated with an inlet of a heat exchanger, one outlet of the heat exchanger is communicated with an outer circulating unit and then communicated with an inlet of the second crystallizer, and the other outlet of the heat exchanger is communicated with an aftertreatment unit and a slurry collector. The first crystallizer is a tubular reaction crystallizer, and the second crystallizer is a continuous crystallizer. The device system is adopted in the preparation technology. According to the device system and preparation technology, the device cost is low, meanwhile, the submicron material with even particle size distribution and the high degree of crystallinity can be prepared continuously, and the device system and preparation technology are suitable for industrial production.

The invention relates to a high-stability TiO2 nano-scale solution and a preparation method thereof, and further relates to special crystallization equipment for the preparation method. The preparation method comprises steps as follows: titanate is taken as a titanium source and hydrolyzed under the acidic condition, a TiO2 sol precursor solution is formed, and the TiO2 sol precursor solution is irradiated with ultrafast laser under the condition that the TiO2 sol precursor solution keeps a flowing state. The preparation method can realize crystallization of particles in the solution at the room temperature, and has the advantages of being simple, low in preparation cost and high in crystallization efficiency; besides, with the adoption of the preparation method, the homogeneous crystallized TiO2 nano-scale solution with the particle size of 5-20 nm can be obtained, and have a good photocatalytic effect; meanwhile, by means of the preparation method, ion doping can be performed better, particle aggregation caused by heating in a doping process is avoided, and accordingly, the photoresponse range of the catalyst is extended into a visible light region.

The invention discloses a system and method for industrially recycling zinc to produce nanometer zinc oxide, and belongs to the technical field of chemical metallurgy. According to the production sequence of zinc recycling, the system comprises a rotary hearth furnace, a desalination device, an ammonia process digestion reactor, a purification reactor, a crystallization reactor, a calcification reactor, a rinsing tank, a drying device and a calcination device. The method comprises the steps that a second-class of zinc-containing material is fed into the rotary hearth furnace for the first timeof zinc recycling refining to produce secondary zinc oxide; ammonia process digestion is carried out on the secondary zinc oxide produced with the rotary hearth furnace and a first-class of zinc-containing material for the second time of zinc recycling refining so as to produce zinc and ammonia complex liquid; then the zinc and ammonia complex liquid is subjected to purification and carbonizationcrystallization to produce zinc oxide precursors; and the zinc oxide precursors are subjected to rinsing, drying and calcination to form a nanometer zinc oxide product. According to the system and method for industrially recycling zinc to produce nanometer zinc oxide, by combining an ammonia process and a rotary hearth furnace technology, the zinc in the zinc-containing materials is deeply recycled in a crossing combination manner, the zinc in the zinc-containing materials is completely recycled, and the grade of the produced zinc-containing product is 95% or more.

The invention relates to a cooling crystallization device. The cooling crystallization device comprises a liquid storage tank, a draught fan, a base, a motor, a bracket and a tank body, wherein the motor is mounted in the base, the bracket is located on the base, and the tank body is mounted on the bracket; an output shaft of the motor stretches out of the base and is fixed with the bracket, and a feeding hole and a discharging hole are formed in the top end and bottom end of the tank body, respectively; and a refrigerator is connected to the liquid storage tank through a first branched pipe, an atomizer is connected to the refrigerator through a second branched pipe, and an atomizing nozzle of the atomizer and an air outlet of the draught fan are aligned with the tank body. According to the cooling crystallization device, water in the liquid storage tank can be cooled through the refrigerator, and the output shaft can drive the bracket to rotate so as to drive the tank body to rotate, so that the whole peripheral surface of the tank body can be cooled; meanwhile, the draught fan can be used for blowing, and atomized water can be rapidly evaporated so as to absorb a large number of heat emitted by crystallization liquid in the tank body, so that the crystallization efficiency is high; atomized water is liquidized into water drops by a cooling cover to fall into the liquid storage tank, so that the circulation use of water is realized; and the cooling is carried out outside the tank body, so that no impurity is produced in the tank body.

The invention relates to a dicumyl peroxide production method, which comprises: co-feeding a dicumyl peroxide raw material and a crystallization solvent into a crystallizer, carrying out cooling crystallization, and carrying out solid-liquid separation on the obtained crystal slurry to obtain a dicumyl peroxide crystal I and a crystallization mother liquor I; discharging the crystallization motherliquor I out of the crystallization device, and carrying out solvent recovery; feeding the dicumyl peroxide crystal I into a beating washing tank, and carrying out beating washing on the dicumyl peroxide crystal I by using a washing liquid; carrying out solid-liquid separation on the obtained crystal slurry to obtain a dicumyl peroxide crystal II and a crystallization mother liquor II; drying thedicumyl peroxide crystal II, and discharging as the product; and returning the crystallization mother liquor II to the crystallizer, and continuously crystallizing. According to the present invention, the dicumyl peroxide production method can solve the problems of poor product quality, irregular crystal shape, poor transparency, serious crystal occlusion and coalescence, non-uniform size and non-uniform distribution of crystal particles, low yield of large particle crystals and high energy consumption in the prior art, and can be used in the production of dicumyl peroxide.