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 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 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 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 discloses a refining method of millet bran cold pressing oil. According to the method provided by the invention, a semi-continuous refining technology is adopted, middle-temperature hydration degumming is adopted, continuous flash vaporization hydration is adopted, and crystallization and filtering are performed for multiple times, so that harmful substances in crude oil are removed, the quality of radish seed oil is improved, and the flavor and nutritional ingredients of the radish seed oil are kept. The cold pressing millet oil prepared by the refining method provided by the invention has the advantages that microelements, such as vitamin E, sterol and oryzanol in the oil can be kept, the oil quality is high, the linoleic acid content is high, the oil cloud point temperature is low and wide promotion and high edible value are realized.

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 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 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.