25results about How to "Crystallize fast" patented technology

The invention discloses a high-toughness polyester heat shrinkage film not prone to brittle fracture and a preparation method thereof, and belongs to the technical field of polymer packaging materials. A specific formula of the polyester heat shrinkage film consists of pure polyethylene glycol terephthalate, dihydric alcohol modified polyethylene glycol terephthalate, polybutylene terephthalate, a toughening-crystallization nucleating complexing agent, a crystallization accelerant, an opening slipping agent and filler. According to the polyester heat shrinkage film obtained by the invention, the thickness is 31.1-51.6 microns, the tensile strength is TD193-202 MPa, the tensile strength is MD23-85 MPa, the elongation at break is TD26-52%, the elongation at break is MD52-46%, the shrinkage rate TD is 47-80%, the shrinkage rate is MD0-15%, the haze is 4.2-5.0%, the light transmittance is 86.5-87.4%, and the elongation at break is not greatly reduced after the polyester heat shrinkage film is placed in a normal-temperature and normal-humidity environment for 24 months and placed in a high-temperature and high-humidity environment for 18 days.

The utility model relates to the field of grease crystallization equipment, and discloses a production device for high-melting-point beef tallow products, which comprises a shell, crystallization plates and crystallization filter cloth, a feed pipe is arranged at the top of one side of the shell, a plurality of crystallization plates are mounted in the shell in a staggered manner along the height direction, the crystallization filter cloth is mounted in each crystallization plate, a discharge pipe is arranged on the shell, and the discharge pipe is communicated with the shell. The discharging pipe is connected with a temporary storage tank, the temporary storage tank is communicated with the feeding pipe through a circulating pipeline, a heater and a circulating pump are installed on the circulating pipeline, a water storage tank is installed outside the shell, a heat exchange pipeline connected with the bottom of each crystallization plate is arranged on the water storage tank, and a heat exchanger and a water pump are sequentially installed on the heat exchange pipeline in the water flowing direction. According to the beef tallow crystallization device, the crystallization plate is arranged and is matched with the crystallization filter cloth placed in the crystallization plate, so that high-melting-point components in beef tallow can be quickly crystallized under the action of the heat exchange pipeline.

The present invention discloses a polyamide foam material and a preparation method thereof, and relates to the technical field of buffer protection, in order to solve the problem of poor resilience and compressive strength of polyamide foam materials. A polyamide composite material is subjected to a cross-linking reaction to obtain a polyamide material to be foamed, wherein the polyamide composite material includes a composite material formed by a polyethylene resin and polyamide; the polyamide material to be foamed is subjected to two-stage foaming by a supercritical foaming method to obtain a polyamide foam material. The polyamide foam material and the preparation method thereof are used to improve the resilience and compressive strength of the polyamide foam material.

The invention discloses a high-yield and high-purity Cs2AgBiBr6 polycrystalline powder room temperature preparation method, which comprises: mixing CsBr powder, AgBr powder and BiBr3 powder, adding DMSO and an anti-solvent, carrying out a room temperature stirring reaction, and after the reaction is finished, carrying out cleaning purification and heating drying on the reaction product to obtain the Cs2AgBiBr6 polycrystalline powder. The Cs2AgBiBr6 polycrystalline powder with the purity close to 100% and the yield reaching 92% is prepared through a simple process under the room temperature condition, a source material is provided for thermal evaporation, sputtering and pulsed laser deposition of a high-quality Cs2AgBiBr6 film, and application of Cs2AgBiBr6 in the aspects of solar cells, photoelectric detection, laser diodes and the like is further promoted.

The present invention relates to an electromagnetic heating and water cooling dual-function casting mold and a casting method, and belongs to the technical field of casting methods. An electromagnetic heating and water cooling dual-function casting mold, comprising a base, an ingot mold body and a pouring pipe both mounted on the base, and a riser mounted above the ingot mold body, characterized in that a spiral water channel is arranged inside the shell wall of the ingot mold shell of the ingot mold body, and a spiral copper tube A for electromagnetic induction heating is arranged on the outside of the ingot mold shell. At the same time, the use method of the electromagnetic heating and water cooling dual-function casting mold is also disclosed. The mold and casting method of the present application can obtain consistent internal and external grains, and the grain size is controlled within a small range of 500-1000 microns. The inconsistency and coarseness of the grains of the final product caused by the difference between the internal and external grains are avoided.

A tough polyester heat shrinkable film that is not prone to brittle fracture and a preparation method thereof, belonging to the technical field of polymer packaging materials, the specific formula of the polyester heat shrinkable film is composed of pure polyethylene terephthalate, diol-modified polyethylene terephthalate, polybutylene terephthalate, toughening-crystallization nucleation composite agent, crystallization accelerator, opening smoothing agent, and filler. The polyester heat shrinkable film obtained by the present invention has a thickness of 31.1~51.6μm, a tensile strength TD193~202MPa, MD23~85MPa, an elongation at break TD26~52%, MD352~466%, a shrinkage TD 47~80%, MD0~15%, a haze of 4.2~5.0%, a light transmittance of 86.5~87.4%, and no significant decrease in elongation at break after being placed in a normal temperature and humidity environment for 24 months and a high temperature and high humidity environment for 18 days.

This invention relates to a method for preparing potassium fluorotantalate from tantalum solution, comprising the following steps: heating and conversion of the solution, transferring the potassium fluorotantalate crystallization solution, cooling and crystallizing the potassium fluorotantalate, discharging the potassium fluorotantalate crystallization mother liquor, washing the potassium fluorotantalate crystals, discharging the potassium fluorotantalate crystals, and drying the potassium fluorotantalate crystals. The beneficial effects are: the method of this invention is suitable for preparing potassium fluorotantalate from tantalum solution with a tantalum oxide concentration of 50 g / L to 80 g / L; high-concentration tantalum solutions do not require dilution with deionized water, saving conversion reaction materials; before adding the potassium fluorotantalate crystallization solution to the crystallization washing tank, hot water is circulated through the media jacket to preheat the crystallization washing tank, preventing excessively rapid cooling when the potassium fluorotantalate crystallization solution is added to the crystallization washing tank, thus preventing the formation of a large number of crystal nuclei or the generation of fine crystals, while allowing sufficient time for crystal growth.

The invention discloses a preparation process of a continuous carbon fiber reinforced PLA composite material for a 3D printing technology, and the preparation process comprises the following steps: S100: preparing raw materials: selecting continuous carbon fibers, PLA particles containing chopped CF, an antioxidant, a coupling agent, a nucleating agent and a lubricant required by production for preparing the composite material; s200, material pretreatment: in order to remove moisture contained in the material, before preparation, taking a certain amount of PLA / chopped CF particles, placing the PLA / chopped CF particles in an electrothermal constant-temperature forced air drying oven, setting a certain temperature, and drying for a certain time. By adding the antioxidant, the coupling agent and the nucleating agent into the raw materials, the resin is modified, nucleation sites are increased, PLA is promoted to crystallize rapidly, and the stability of the material is improved; and the antioxidant and the coupling agent are added to promote effective combination of the resin and the fibers and prevent unnecessary oxidation of the resin under a high-temperature condition at the same time, so that the mechanical property of the composite material is improved.

The invention discloses a valerolactam crystal refining method, which comprises the following steps: distilling an alcohol-valerolactam crude product to remove alcohol and low-boiling-point impurities, adding an extraction solvent, fully stirring, and standing to separate out high-boiling-point impurities, so as to obtain an upper solution which is a valerolactam crude solution; the valerolactam crude liquid is evaporated to remove an extraction solvent, then a non-benign solvent is added for recrystallization and filtration, the valerolactam crystal is obtained, the method is short in preparation process and low in energy consumption, and the obtained product valerolactam is few in heavy component residue and high in quality.

The invention discloses a preparation process of natural menthol. The preparation process comprises the following steps: performing reduced-pressure segmented rectification on crude mint oil or / and dementholized peppermint oil to obtain an olefin fraction, a menthone fraction and a menthol fraction; mixing and dissolving the obtained menthone fraction and the menthol fraction in proportion to form a material to be crystallized; cooling and crystallizing the material to be crystallized, and filtering to obtain menthol crystals; and drying the menthol crystal to obtain a finished product. The menthone fraction is obtained by adopting a rectification method and then is blended with the fraction with high content of L-menthol, so that the variety of impurities of the product is reduced, the crystallization process is convenient and controllable, and the problems that the variety of impurities is large, the crystallization time of the product is long, the yield is low and the like when natural peppermint oil is adopted for blending are avoided; the method has the advantages of rapid crystallization process, good crystal morphology and high crystallization yield.

The invention discloses an automatic treatment system for a metal pickling waste acid solution, which comprises a pickling tank used for carrying out pickling operation on a metal surface and generating a waste acid solution in the process; the cooling crystallization unit is used for receiving the waste acid solution from the pickling tank and promoting metal salts in the waste acid solution to be separated out and crystallized through a cooling process; the solid-liquid separation unit is used for receiving the mixture output by the cooling crystallization unit and separating the mixture into metal salt crystals and acid liquor; the metal salt crystal collecting device is used for collecting the metal salt crystals separated by the solid-liquid separation unit; the evaporation and concentration unit is used for receiving the acid liquor output by the solid-liquid separation unit and increasing the concentration of the acid liquor in the acid liquor through an evaporation and concentration process; compared with the prior art, the concentrated acid liquor flows back to the pickling tank to form closed-loop circulation, so that cyclic utilization of resources is realized.

The invention discloses a high-strength and high-barrier polylactic acid film and a preparation method and application thereof.The preparation method comprises the following steps that S1, a polylactic acid matrix and block copolymerized polylactic acid are dissolved with a solvent and then mixed, and a solution is obtained; s2, precipitating the solution with ethanol to obtain a precipitate; s3, the precipitate is dried, and a blend is obtained; and S4, carrying out melting, hot pressing and isothermal crystallization on the blend to obtain the high-strength and high-barrier polylactic acid film. Block copolymerized polylactic acid is utilized to promote rapid crystallization of a polylactic acid matrix, and the polylactic acid film is endowed with high barrier property while the mechanical property of the polylactic acid film is improved. The prepared high-strength and high-barrier polylactic acid film is applied to the field of packaging or agricultural mulching films.

The utility model discloses a raw material reaction kettle for adenine processing, and particularly relates to the technical field of adenine processing, the raw material reaction kettle comprises a reaction kettle I, the output end of the lower part of a refrigeration pipe is fixedly connected with a cooling mechanism, the lower part of the outer surface of a heater is fixedly connected with a heating mechanism, and the bottom wall of an inner cavity of the reaction kettle I is fixedly connected with a material conveying mechanism; the lower end of the outer surface of the reaction kettle I is fixedly connected with a supporting mechanism, and the lower side of the middle of the supporting mechanism is in threaded connection with a material collecting mechanism. According to the raw material reaction kettle for adenine processing disclosed by the utility model, the inner cavity of the reaction kettle I can be heated through the heater and the heating mechanism, and raw materials in the inner cavity of the reaction kettle I can be rapidly cooled and crystallized through the cooler and the cooling mechanism; and meanwhile, the raw materials after complete reaction can be conveyed downwards through the material conveying mechanism, and finally, the raw materials are uniformly collected through the material collecting mechanism, so that the practicability and universality of the device are improved.

The invention discloses a wear-resistant quick-dry hot-melt marking material and a preparation method thereof, and relates to the technical field of marking coatings. The wear-resistant quick-dry hot-melt marking material prepared by the invention is prepared from modified petroleum resin, titanium dioxide, filler, glass beads, crosslinked polyethylene wax and auxiliaries, the modified petroleum resin is prepared by reacting hydroxyl hyperbranched polysiloxane, epoxy polyol, dimethyl triphenylmethane tetraisocyanate and amino polysulfide rubber in petroleum resin, so that the strength and the heat resistance are effectively improved, and the service life of the hot-melt marking material is prolonged; the cross-linked polyethylene wax is prepared by reacting polyoxyethylene ether maleic anhydride with polypropylene carbonate and then cross-linking with polyethylene wax, and the polyoxyethylene ether maleic anhydride is prepared by copolymerizing diallyl polyoxyethylene ether and maleic anhydride, so that the drying time can be shortened.

The invention discloses a high-strength and high-toughness PET / PEF plastic alloy and a preparation method thereof.The preparation method comprises the following processes that S1, PEF is prepared, specifically, a polymerization reaction kettle is used, 2, 5-furandicarboxylic acid, ethylene glycol, a catalyst, an antioxidant and a stabilizer are added according to a certain proportion, esterification is conducted for 2-2.5 hours at the temperature of 210-230 DEG C, then slow vacuumizing is conducted till the vacuum degree is smaller than 80 pa, and then the PEF is obtained; carrying out polycondensation at 240-260 DEG C for 2-3 hours, and then pressurizing and discharging to obtain PEF; s2, drying the prepared PEF in a blast drying oven, drying PET at the same time, and then adding PET, PEF, a chain extender and a plasticizer into a high-speed mixer according to certain parts by weight for stirring; and S3, adding the mixed raw materials into a double-screw extruder, setting the temperature of each region and the rotating speed of a screw rod, extruding, and granulating to obtain the PET / PEF plastic alloy. According to the invention, the furan polyester PEF is adopted as a modifier to modify PET, the strength and toughness of the PET are enhanced, the compatibility is good, no complex compatilizer is added, and the high-strength and high-toughness PET / PEF plastic alloy is obtained.

The utility model relates to the technical field of waste liquid treatment, and discloses a salt-containing waste liquid treatment device which comprises a base mechanism and an incineration barrel mechanism, the incineration barrel mechanism comprises a supporting block, the supporting block is fixedly connected to a base, an incineration barrel is movably placed on the supporting block, a first handle is fixedly connected to the incineration barrel, and a second handle is fixedly connected to the incineration barrel. The barrel cover mechanism is fixedly connected with a motor and a second handle, the motor is fixedly connected with a turning blade, salt-containing waste liquid is added into the incineration barrel through the water inlet pipe, the heating assembly heats the salt-containing waste liquid in the incineration barrel, and inorganic salt is left in the incineration barrel; the incineration barrel can be conveniently pulled out by holding the first handle to clean the waste liquid in the incineration barrel, cleaning is convenient, the barrel cover mechanism can be conveniently disassembled through the second handle, the motor rotates the turning blades to stir the salt-containing waste liquid in the incineration barrel, flowing of the waste liquid is accelerated, inorganic salt crystallization is faster, and the treatment time of the salt-containing waste liquid is shortened.

The utility model relates to the technical field of sodium carbonate production, in particular to a sodium carbonate crystallization optimizing device which comprises a stabilizing assembly, the stabilizing assembly comprises a base, the top of the base is fixedly connected with a straight plate, the top of the straight plate is fixedly connected with a machine frame, the machine frame is provided with a driving assembly in a matched mode, the driving assembly comprises a stabilizing base, and the stabilizing base is provided with a driving assembly. A rotating shaft rotationally penetrates through the stabilizing seat, a rotating wheel is fixedly connected to the end face of the rotating shaft, a transmission assembly is arranged on the side wall face of the rotating shaft in a matched mode and comprises a first bevel gear connected to the outer wall face of the rotating shaft in a sleeving mode, and teeth of the first bevel gear are in engaged transmission with a second bevel gear; the bottom of the second bevel gear is fixedly connected with the stand column, the stand column can rotate synchronously through meshing transmission of the first bevel gear and the second bevel gear, torque of the rotating wheel is transmitted to the key shaft through matched arrangement of the belt wheel component, the key shaft and the stand column, the labor-saving transmission effect of the rotating wheel is finally achieved, and crystallization operation of personnel is facilitated.

The application discloses a kind of polyamide 56 monofilament satisfying high strength, high haze, high transparency simultaneously and preparation method and application, belong to high polymer material processing field.The polyamide 56 monofilament of the application is prepared by secondary granulation, melt spinning with polyamide 56, high molecular weight polymer carrier and inorganic nano-particle as raw material.The polyamide 56 monofilament of the application satisfies high strength, high haze, high transparency simultaneously, strength is greater than or equal to 3.0 cN / dtex, light transmittance is greater than or equal to 80%, haze is greater than or equal to 70%, with wide application prospect.

The composite coating material of the present invention comprises a three-layer structure. In the middle layer, based on 100 parts by weight of sodium acetate trihydrate, the amount of borax nucleating agent is controlled at 5.1-9.6 parts by weight, which enables the surface temperature of the composite coating material to be controlled at 40±1.5℃, meeting the usage requirements of traditional Chinese medicine ironing.

The present application relates to the technical field of carbon dioxide emission reduction, and relates to an electrochemical enhanced evaporation crystallization closed-loop carbon dioxide recovery method and device. A low electric field is applied to an electrochemical absorption unit containing alkali absorption liquid, so that carbon dioxide is accelerated to convert into carbonate or bicarbonate in potassium hydroxide / potassium carbonate solution. Subsequently, the carbonate-rich solution is introduced into an evaporation-interface crystallization unit composed of hydrophilic fibers, industrial waste gas waste heat is used to drive interface evaporation, and efficient crystallization of potassium carbonate is realized in the designated area of the fibers. The aqueous solution of solid potassium carbonate and / or the uncrystallized mother liquor is sent into an electrochemical regeneration unit, potassium hydroxide is regenerated by electrochemical method, and high-purity carbon dioxide is released, so that the closed-loop process of absorption-crystallization-regeneration is realized. The present application has the advantages of low regeneration energy consumption, avoidance of high-temperature calcination, efficient and controllable crystallization, and modulization and amplification, and is suitable for carbon dioxide-containing waste gas emission reduction and resource utilization in the steel, chemical, power and other industries.

This invention relates to the field of lithium-ion battery cathode material technology, specifically a high-performance lithium-rich manganese-based cathode material based on pretreated boron nitride, its preparation method, and its application. The preparation method includes: introducing hydroxyl and amino groups onto the surface of boron nitride nanosheets; preparing a composite precursor powder by mixing a nickel-cobalt-manganese hydroxide precursor, a lithium source, TiO2, a phosphorus source, and pretreated boron nitride; sequentially performing conventional pre-calcination, a first-segment Joule heat treatment, and a second-segment Joule heat treatment; performing a third-segment instantaneous Joule heat treatment, followed by quenching; by introducing a surface-functionalized high thermal conductivity boron nitride network into the bulk phase of the material, and combining a programmed sequential heat treatment of "pre-calcination-two-segment Joule heat treatment" with instantaneous surface melting and quenching, this method effectively solves the inherent thermal gradient problem of the Joule heating method, simultaneously achieving high bulk phase homogenization and surface stabilization, resulting in a product with excellent comprehensive electrochemical performance.

The utility model relates to the technical field of metallurgy, and particularly discloses a crystallizer heating device. The device comprises a crystallizing tank, a cavity is arranged between the crystallizing tank and the inner wall of a crystallizer, and the crystallizing tank is communicated with a heater through a heating pipeline in the heater. A heat insulation cavity and a heating pipe are arranged in the heater, and condensate water is led in or discharged from the protection cavity through a condensation opening. The electric heating tube serves as a heating source and is connected with a power line through the bottom of the protection cavity. And the heating cavity of the crystallizer is connected with an external steam component through a heating pipeline and a steam outlet flange. A circulating pump is arranged at the bottom of the heater and connected with the condensation opening through a condensation opening flange. A machine body of the heater comprises a protection tank body, a heating tank body and an outlet tank body which are connected through flanges. The outer surface of the heating tank body is further provided with a mounting seat and a hoisting fastener, so that mounting and hanging are facilitated. The device has the advantages of efficient heating, safety, reliability, easiness in installation and maintenance and the like.

This invention discloses a liquid sulfur granulation system and a liquid sulfur granulation method. The liquid sulfur granulation system includes a liquid sulfur pump (1), a sulfur feeding device (2), a sulfur forming facility (3), a vibrating screen (4), and a pre-crystallization facility (16), the pre-crystallization facility (16) having a pre-crystallization chamber. The liquid sulfur granulation method involves mixing fine sulfur powder separated by the vibrating screen (4) with liquid sulfur from the liquid sulfur pump (1) in the pre-crystallization chamber of the pre-crystallization facility (16). The fine sulfur powder acts as a seed crystal, inducing the liquid sulfur to pre-crystallize and form pre-crystallized crystal nuclei. The liquid sulfur containing the pre-crystallized crystal nuclei undergoes heat exchange with cooling water in the sulfur forming facility (3), cooling and forming into solid sulfur particles. This invention can be used for liquid sulfur granulation.

The utility model discloses a Fenton fluidized bed rapid crystallization device which comprises a reaction tower, a raw water adjusting assembly, a crystal filtering assembly, a crystal separation box, a reflux tank assembly, a sulfuric acid liquid storage barrel, a ferrous sulfate liquid storage barrel, a hydrogen peroxide liquid storage barrel, a raw water rapid mixer, a reflux rapid mixer I and a reflux rapid mixer II, the reaction tower comprises a downstream assembly, a countercurrent assembly, a steady flow layer I, a steady flow layer II, a crystallization layer, a baffling layer, a solid crystal assembly and a feeding assembly which are sequentially arranged from bottom to top; through control of the raw water quick mixer, the first backflow quick mixer and the second backflow quick mixer on reaction water flow and synergistic reaction between the upper layer and the lower layer, quick crystallization is realized. The device is fast in crystallization and low in reagent consumption.

The invention relates to the technical field of spray drying, and discloses a powdery sodium silicate spray drying device which comprises a kettle body. The feeding pipe is used for providing an input channel for vaporific sodium silicate particles; the drying assembly is used for circularly drying the vaporous sodium silicate entering the kettle body; the shaking assembly is used for shaking off the crystal particles on the drying assembly; and a discharging assembly. According to the powdery sodium silicate spray drying device, through the arranged drying assembly, vaporific sodium silicate can be indirectly dried, heat is radiated on a circulation path of vaporific raw materials at intervals, and the vaporific sodium silicate is dried, so that impurities and water vapor in high-temperature gas can be prevented from repeatedly acting on the surfaces of the raw materials; the quality effect of sodium silicate crystallization is ensured. And the spiral blades are utilized, so that indirect heat can be utilized to dry the raw materials, the raw materials can be quickly crystallized, and the overall flowing crystallization efficiency is improved.