37results about How to "Guaranteed crystallization effect" patented technology

The invention relates to a method for preparing high-solid-content waterborne polyurethane. The method comprises the following steps of: (1) reacting sulfonate-containing sodium dimethyl isophthalate-5-sulfonate with excessive polylol for a while, and then, adding polyacid to react so as to synthesize hydroxyl-terminated polyester; and (2) using the synthesized waterborne polyester as a soft segment, using diisocyanate as a hard segment, adding water to disperse, and carrying out chain extension by using polyamine so as to obtain the high-solid-content waterborne polyurethane. According to the method, the dispersion is easy, a large amount of solvent is not required for being used, the cost is saved, the solvent removal is easy, and the solid content reaches over 50% while lower viscosity is kept, so that the constructability of adhesive liquid is improved, and the adhesive liquid is crystallizable and has better initial viscosity and better adhesive strength; and the used polyester is synthesized autonomously, the raw materials are all common, and the process is simple, so that the cost is saved, and the industrialization is facilitated.

The invention discloses an amylum category complete biodegradable material and a preparation method thereof. The amylum category complete biodegradable material comprises, by weight, the long-chain branch aliphatic polyester or long-chain branch aliphatic series- aromatic copolyesters 50-70%, the starch 20-30%, the chain extender 0.1-3% and the balance chain extender 9-17%. The preparation method comprises the steps of enabling all components to be mixed in a high speed mixer, feeding in a twin-screw extruder after accurate measurement by means of a measurement scale, and extruding and prilling by adjusting a built-up sequence of a screw and designing different exhaust ports. The amylum category complete biodegradable material and the preparation method of the amylum category complete biodegradable material solve the problems of dispersing, plasticizing and exhausting of starch filler in the twin-screw extruder, and obtained amylum complete biodegradation material not only has complete biodegradation performance, but also has excellent mechanical property and good extrusion molding working quality.

The invention discloses a CaO-MgO-Al2O3-SiO2 microcrystalline glass which is composed of glass aggregate and oxide nucleating agent accounting for 3wt% of glass aggregate, wherein the glass aggregate is composed of the following components in percentage by weight: 50-55wt% of SiO2, 6-10wt% of MgO, 15-18wt% of CaO, 10-12wt% of Al2O3, 3-6wt% of Na2O and / or K2O, 8wt% of CaF2 and 1wt% of Sb2O3. The invention simultaneously provides a preparation method of the CaO-MgO-Al2O3-SiO2 microcrystalline glass. In the CaO-MgO-Al2O3-SiO2 microcrystalline glass, nucleating agent of oxide and fluoride is adopted, so that the devitrification activation energy of a system is lowered, a crystal growth index is improved, and the devitrification capability of the microcrystalline glass is greatly enhanced, thereby bringing convenience for preparing the microcrystalline glass with a whole method.

The invention provides a composite shape-stabilized phase change material. The phase change material is a crystallized hydrated salt phase change material, and a support material is meerschaum. A preparation method of the phase change material comprises the following steps: performing acid treatment, high-temperature treatment and organic treatment on the meerschaum in sequence; performing an adsorption reaction on the treated meerschaum and a saturated aqueous solution of a crystallized hydrated salt under a vacuum condition to obtain a novel composite shape-stabilized phase change material. The composite shape-stabilized phase change material has the advantages that 1) packaging and shape stabilizing of the phase change material are realized through the porous structure of the meerschaum, the loss of phase change material crystal water is limited successfully through a functional group of the meerschaum, phase separation is reduced, and the crystallization performance and phase change energy storage feature of the crystallized hydrated salt phase change material are ensured; 2) raw materials of the support material and the phase change material are low in prices and readily-available; the composite preparation method is simple and convenient. By adopting the composite shape-stabilized phase change material and the preparation method, the phase separation phenomenon, overcooling phenomenon and leakage are reduced, and the stability of the phase change material in a long-term use process is improved; the phase change material has a wide application prospect in the phase change heat storage field.

The invention discloses a glass ceramic crystallization method and device. The crystallization method comprises melting, calendaring molding, roller-bed coring, tin-pond crystallizing, roller-bed annealing, cutting and batching out, wherein the crystallization device comprises a tin pond brick through beam, a tin pond top cover brick, a heating element, a lifting device, a tin pond, a front transition roller bed and a rear transition roller bed, one end of the lifting device is fixedly mounted at the bottom of a cross beam, the other end of the lifting device is connected with the tin pond topcover brick, the heating element is connected with the bottom of the tin pond top cover brick, a crystallization tin pond is arranged at the lower part of the heating element and comprises a tin pondbottom brick, a tin pond wall brick and a tin pond breast wall, and the front transition roller bed and the rear transition roller bed are respectively arranged on the two sides of the tin pond. Thethree-step heating melting method and the three-step calendaring molding method greatly improve the transparency, the toughness, the compressive strength and the crack resistance of a glass sheet; theroller-bed coring is adopted, then the high-temperature conveying of the glass sheet is facilitated, and the roller-bed coring is favorable for the even heating of the glass sheet; and the tin-pond crystallizing improves the flatness of the surface of the glass ceramic glass sheet.

The present invention discloses a camellia oil dewaxing degreasing process. According to the process, according to the grease crystal form obtaining determined by the cooling rate and the crystallization temperature, and the sufficient time required by the achievement of the stable crystal form, stepless speed adjustment is adopted to stir, such that various positions in the grease is uniform; the precipitated grease crystal collides with the grease molecule to be precipitated so as to easily achieve formation and growth of the crystal grain; a screw pump is adopted to convey; the small unit and whole combined freezing is adopted, the refrigerant circulating pump is arranged in each crystal crystallization tank and each crystal culture tank, and the freezing performs the unit circulating when the production is low; the filtration way adopts the high position tank liquid level pressure difference and the screw pump to filter, the degreasing filtration adopts the filtration paper, and the middle speed is controlled; and during the whole freezing process control, the intelligent control system is designed, the operator can easily operate after setting the temperature, the freezing liquid temperature and the temperature inside the machine adopt the digital display meters, and the system automatically shuts down when the phenomena of power-down and water cut-off generate.

The invention relates to a synthesis device for an economic molecular sieve membrane. The prior art is improved for circulating a membrane casting solution in a crystallization process to the outsideof a synthesis kettle, and a reasonable valve is arranged for controlling the volume of the membrane casting solution which enters a sedimentation kettle and the membrane casting solution of the corresponding time quantum, so that the sedimentation effect is the best on the basis of guaranteeing the crystallization effect.

The invention discloses a synthesis method of a high-dispersion multi-element precursor. The synthesis method comprises the following steps: a, preparing a mixed solution from metal salt and a negative additive or a positive additive by using deionized water; b, preparing a mixed solution from an alkaline precipitator and a negative additive or a positive additive by using deionized water, whereinthe additive used in the step is different from the additive used in the step A; c, adding the mixed solution obtained in the step A and the step B and an ammonia water solution into a reaction device for synthesis to obtain a reaction product; and d, sequentially filtering, washing and drying the reaction product. The method has the advantages that: 1) the purpose of controlling the reaction microenvironment is achieved through the action of two reverse additives, so that the morphology of primary particles and the size of secondary particles are effectively controlled; 2) the problem of poor sphericity of small-particle products is solved. 3) the particle morphology consistency of the blended product is improved. 4) the synthesized material is in narrow distribution, and the particle morphology consistency among different batches is high.

The invention discloses a method for refining cold pressed oil of radish seeds. The method comprises the following steps: adopting a semi-continuous refining process, performing medium temperature hydrated degumming, performing continuous vacuum flash dehydration and performing repeated crystallization and filtration, so that harmful substances in crude oil are removed, the quality of the radish seed oil is improved, and the flavor and nutritional ingredients of the radish seed oil are maintained. The cold pressed radish seed oil prepared by the method disclosed by the invention is high in quality, high in content of grease active materials and low in cloud point temperature and has wide popularization values.

The invention belongs to the technical field of dewaxing devices and particularlyspecifically relates to an edible oil dewaxing device. The edible oil dewaxing device comprises a mixing device, a crystallization device, a filtering device, an oil pump and an oil storage tank; the mixing device comprises a heating tank, a feeding hopper, a diatomite spraying pipe and oil spraying pipes; the feedinghopper is arranged in the heating tank; the diatomite spraying pipe is arranged at the upper end of the feeding hopper, and the oil spraying pipes are arranged on the two sides of the diatomite spraying pipe; the crystallization device comprises a crystallization box, an oil inlet, an oil outlet, a cold water inlet, a cold water outlet, spiral pipes and a stirring module; the oil inlet is connected with a flow-dividing hose, the oil outlet is connected with the flow-dividing hose, and the spiral pipes are connected to the flow-dividing hose; and the stirring module is arranged below the spiral pipe and comprises a planetary gear system, pushing plates and an S-shaped rotating shaft. According to the edible oil dewaxing device, the heating tank heats a mixture in the feeding hopper, so that mixing of edible oil and diatomite is accelerated, the dewaxing effect in subsequent work is improved, and the dewaxing quality of the edible oil is improved.

The invention relates to the technical field of phase change materials, in particular to a preparation method of a vanadium dioxide film. The preparation method provided by the invention comprises the following steps: sputtering vanadium dioxide on the surface of a substrate in a vacuum reaction chamber by adopting a radio frequency magnetron sputtering method, raising the temperature of the substrate, and carrying out in-situ annealing to obtain a vanadium dioxide film; wherein no buffer layer is arranged between the substrate and the vanadium dioxide film; the conditions of the radio frequency magnetron sputtering are as follows: the temperature of the substrate is 250-300 DEG C; the flow rate of argon introduced into the reaction chamber is 0.8 sccm; the flow rate of oxygen introduced into the reaction chamber is 40 sccm; the air pressure of the reaction chamber is 0.8 Pa; the sputtering time is 15 to 20 minutes; the sputtering power is 95W; the in-situ annealing temperature is 460-520 DEG C, and the heat preservation time is 200 s; and the time for raising the temperature to the in-situ annealing temperature is less than or equal to 7s. According to the preparation method, the vanadium dioxide thin film with good optical performance can be obtained on the premise that a buffer layer is not arranged.

The invention relates to a method for synthesizing porous boron nitride at low temperature under amine assisting action. The method comprises the following steps of (1) dissolving borane ammonia into 1,4-dioxane; (2) dissolving amine into the 1,4-dioxane; (3) adding a solution prepared in step (2) into a solution in step (1), heating to 140 to 200 DEG C, and reacting for 12 to 24h in a sealing way; (4) standing, centrifuging and drying, so as to obtain white powder; (5) putting the white powder into a tubular furnace, and calcining for 6 to 8h at the temperature of 650 to 750 DEG C under ammonia atmosphere, so as to obtain the porous boron nitride. The method has the advantages that the environment-friendly effect is good, the subsequent treatment of dangerous solutions, such as hydrofluoric acid and sodium hydroxide, is not needed, and the operation is safe.

The invention relates to a method for synthesizing porous boron nitride at low temperature under amine assisting action. The method comprises the following steps of (1) dissolving borane ammonia into 1,4-dioxane; (2) dissolving amine into the 1,4-dioxane; (3) adding a solution prepared in step (2) into a solution in step (1), heating to 140 to 200 DEG C, and reacting for 12 to 24h in a sealing way; (4) standing, centrifuging and drying, so as to obtain white powder; (5) putting the white powder into a tubular furnace, and calcining for 6 to 8h at the temperature of 650 to 750 DEG C under ammonia atmosphere, so as to obtain the porous boron nitride. The method has the advantages that the environment-friendly effect is good, the subsequent treatment of dangerous solutions, such as hydrofluoric acid and sodium hydroxide, is not needed, and the operation is safe.

The invention discloses a cefaclor bulk drug, which is produced by the following steps: S1, salifying 7-amino-3-chloro cephalosporanic acid and nitrogen-containing organic base, dissolving in an organic solvent, and uniformly stirring the organic solvent by using stirring equipment for 5 minutes to obtain a 7-amino-3-chloro cephalosporanic acid solution; S2, dissolving phenylglycine dane salt andpivaloyl chloride which serve as raw materials into an organic solvent, adding a catalyst into the organic solvent to obtain a mixed anhydride solution, and pressurizing and injecting the catalyst into the organic solvent under the action of a water pump; and S3, carrying out acylation condensation reaction on the 7-amino-3-chloro cephalosporanic acid dissolving solution and the mixed anhydride solution under the action of a catalyst, adding acid for hydrolysis, and carrying out phase splitting to obtain an aqueous solution of cefaclor and acid salifying. According to the cefaclor raw materialmedicine, the superfine silica powder and the magnesium stearate are added, so that prepared particles have good fluidity and compressibility; and a double crystallization mode is adopted, so that the crystallization effect of the medicine is ensured, and the crystallization is more complete.

The invention relates to a melting crystallizer which comprises a cylinder body (6), an outer pipe (8), an upper sealing head (20), a lower sealing head (3), a middle pipe box (14) and an inner pipe box (17). According to the melting crystallizer provided by the invention, a pipe-layer heat medium flow passage is arranged on the inner side of a crystalline material flow passage, and a shell-layer heat medium flow passage is arranged on the outer side of the crystalline material flow passage, so that the heat transfer area of crystalline materials and heat transfer media is effectively increased. Therefore, the upper and lower temperature gradient of a crystallization pipe is small, and the crystallization effect is ensured; since two annular crystallization surfaces are arranged inside the one crystallization pipe, the thickness of a crystallizing layer can be decreased effectively after crystal formation, the heat transfer effect between the crystalline materials and the heat transfer media is strengthened, and meanwhile, the crystallization area is increased, and the productivity of the crystallizer is improved.

The invention relates to an economic Beta molecular sieve membrane synthetic method. Through improvement of the current technologies, a casting solution during a crystallization process is cycled outside a synthesis kettle, reasonable arrangement of a valve can control a volume of the casting solution in a deposition kettle and the casting solution at a corresponding time segment, and based on guarantee of crystallization effect, the seed coating effect can be optimum.

The invention relates to a synthesis method of a pure silicon molecular sieve membrane. The prior art is improved, membrane casting liquid in the crystallization process is circulated to outside a synthesis kettle, the volume of the membrane casting liquid entering a precipitating kettle and the membrane casting liquid in the corresponding time periods are controlled through reasonable arrangementof a valve, and the seed crystal coating effect is the best on the basis that the crystallization effect is ensured.

The invention discloses a single crystal temperature airflow generation device and relates to the technical field of rock sugar production equipment. The single crystal temperature airflow generationdevice comprises a box. An air blower device is fixed to one side of the box. A first air inlet pipe communicates between an air outlet of the air blower device and the bottom of a first hot air box.A second air inlet pipe communicates between the air outlet of the air blower device and the bottom of a second hot air box. A solenoid valve is arranged at the end, connected with the air blower device, of the second air inlet pipe. The single crystal temperature airflow generation device forms a heat slow storage space in the air mixing box by changing the direction of airflow during overheating, conducts cooling through an air source without dissipating heat to the outside, can quickly reduce the temperature to the safe temperature and conducts switching between two hot air generation modes. Heat is almost completely used for heating the airflow. The heat utilization rate is high. The production cost is saved. The single crystal temperature airflow generation device can guarantee delivery of hot air all the time without stopping operation and guarantees the rock sugar crystallization effect.

The invention belongs to the technical field of edible oil production processes and specifically particularly relates to an edible oil dewaxing process. The edible oil dewaxing process comprises the following steps that edible oil and diatomite are simultaneously injected into a feeding hopper of a dewaxing device to start to work; a heater in a heating tank ofin the dewaxing device is started toheat up liquid in the heating tank, and a mixture of the edible oil and the diatomite is heated; meanwhile, cold water is injected into a crystallization box, and continuous injecting of the cold water is ensured; the mixture is injected into a spiral pipe in the crystallization box, and wax in the edible oil is condensed and crystallized under the effect of the cold water; and wax crystals are filtered and collected, and the filtered edible oil is stored. According to the edible oil dewaxing process, by using the dewaxing device, the efficiency of wax crystallization is effectively improved,the wax in the edible oil is fully separated out, and the quality of the edible oil is improved.

The invention provides a composite shape-stabilized phase change material. The phase change material is a crystallized hydrated salt phase change material, and a support material is meerschaum. A preparation method of the phase change material comprises the following steps: performing acid treatment, high-temperature treatment and organic treatment on the meerschaum in sequence; performing an adsorption reaction on the treated meerschaum and a saturated aqueous solution of a crystallized hydrated salt under a vacuum condition to obtain a novel composite shape-stabilized phase change material. The composite shape-stabilized phase change material has the advantages that 1) packaging and shape stabilizing of the phase change material are realized through the porous structure of the meerschaum, the loss of phase change material crystal water is limited successfully through a functional group of the meerschaum, phase separation is reduced, and the crystallization performance and phase change energy storage feature of the crystallized hydrated salt phase change material are ensured; 2) raw materials of the support material and the phase change material are low in prices and readily-available; the composite preparation method is simple and convenient. By adopting the composite shape-stabilized phase change material and the preparation method, the phase separation phenomenon, overcooling phenomenon and leakage are reduced, and the stability of the phase change material in a long-term use process is improved; the phase change material has a wide application prospect in the phase change heat storage field.

The invention relates to a synthesis device for an economic molecular sieve membrane. The prior art is improved for circulating a membrane casting solution in a crystallization process to the outsideof a synthesis kettle, and a reasonable valve is arranged for controlling the volume of the membrane casting solution which enters a sedimentation kettle and the membrane casting solution of the corresponding time quantum, so that the sedimentation effect is the best on the basis of guaranteeing the crystallization effect.

The invention provides a preparation method of a ditelluride nanosheet, which comprises the following steps: S1) mixing a metal ditelluride crystal, an alkali metal salt and an aprotic solvent for reaction under a high pressure condition to obtain an intermediate inserted with alkali metal ions; and S2) stripping the intermediate inserted with the alkali metal ions in a protic solvent to obtain the ditelluride nanosheet. Compared with the prior art, alkali metal ions are inserted between metal ditelluride layers under the condition of high pressure, so that the crystallinity and integrity of the plane are ensured while the interlayer spacing is enlarged. Rapid expansion dissociation is carried out in protic solvent, solvent molecules are fully utilized to enter interlayer of intermediate, interlayer spacing is further enlarged, interlayer van der Waals force of metal ditelluride material is overcome, meanwhile, intralayer chemical bonds are effectively protected, and the large-size and high-quality ditelluride nanosheet is obtained. According to the method, solution reaction is utilized, the method is simple, the yield is high, the process is controllable, and macro quantization can be achieved.

The invention relates to an economic Beta molecular sieve membrane synthetic method. Through improvement of the current technologies, a casting solution during a crystallization process is cycled outside a synthesis kettle, reasonable arrangement of a valve can control a volume of the casting solution in a deposition kettle and the casting solution at a corresponding time segment, and based on guarantee of crystallization effect, the seed coating effect can be optimum.

The invention belongs to the technical field of degradable materials, and in particular relates to a method for preparing a fully degradable PLA-PHA material with high toughness and dyeability, comprising the following steps: (1) weighing PLA powder and PHA powder, and mixing them evenly after drying to obtain a mixture (2) Add polyester stabilizer, antioxidant and nucleating agent to the mixture in step (1), mix well, melt and extrude through a twin-screw extruder, cut into pellets by water cooling, and dry to make master batches ; The weight parts of each substance in the step (1) and step (2) are: 60-80 parts of PLA powder, 20-30 parts of PHA powder, 0.5-2 parts of polyester stabilizer, 0.1-1 part of antioxidant , 0.1-1 part of nucleating agent. The molar content of 4-hydroxybutyric acid in the PHA of the present invention is 20-25 mol%, and the higher content of 4-hydroxybutyric acid can significantly improve the flexibility of the composite material, so that the present invention can be obtained without adding a plasticizer The high toughness PLA‑PHA composite material ensures high toughness without affecting the mechanical properties such as tensile strength of the material.

The invention relates to a circulating cooling continuous casting crystallizer, which comprises a crystallizer body, an outer shell and a cooling box. Bosses are arranged at both ends of the crystallizer body, and the outer shell is sleeved on the bosses. The crystallizer A closed first cooling channel is formed between the body, the boss and the outer shell, and the boss is respectively provided with a first water inlet and a first water outlet communicating with the first cooling channel; the outer shell is provided with a second Cooling channel, the two ends of the outer casing are respectively provided with a second water inlet and a second water outlet connected to the second cooling channel; a serpentine heat exchange tube is provided in the cooling box; a side of the cooling box near the water outlet pipe is provided There is a blower, and the side of the cooling box near the water inlet pipe is provided with an exhaust fan. The crystallizer of the present invention adopts two cooling passages to improve the heat dissipation efficiency, make the heat dissipation more uniform, keep the crystallization speed of the crystallizer consistent, and ensure the crystallization effect. Cooling water recycling is adopted to reduce the utilization of water resources, reduce costs, and improve the integrity of the system and the stability of system operation.

The invention relates to a mixing and stirring device of a crystallization kettle. The mixing and stirring device comprises a stirring shaft which is installed on an output shaft of a transmission device, wherein the circumferential surface of the stirring shaft is sequentially and alternately provided with bending blades which are vertical to the stirring shaft from top to bottom, each bending blade is provided with a connecting rod, and the connecting rod is tightly connected with the stirring shaft through a bolt; the bending blades in different directions are in parallel, and the outer ends of the bending blades in different directions are connected together through a connecting rod plate; and a stirring mechanism is arranged at the bottom of the stirring shaft. The mixing and stirring device is reasonable in structure, the stirring blades which are installed on each group of stirring mechanism adopt different shapes, each blade is convenient to install, the stirring effect is good, uniformity in stirring can be achieved, a crystallization effect of the crystallization kettle can be effectively guaranteed, and the production efficiency is increased.

The invention provides a sea-island slice allowing low-alkaline splitting. The sea-island slice comprises 55wt%-80wt% of terephthalic acid, 24wt%-55wt% of ethylene glycol, 5wt%-7wt% of isophthalic acid, 2.1wt%-11wt% of ternary monomer isophthalic acid-5-sodium sulfonate, 4wt%-8wt% of quaternary monomer polyether and 0.02wt% of antimonous oxide, wherein the molecular weight of polyether is 600-1,500. The water solubility and crystallization property of the polyester sea-island slice are combined together successfully, splitting can be performed at the low-alkaline concentration while the strength of prepared sea-island fiber is guaranteed, so that the cost is saved, and environmental damage is reduced.