561results about How to "Shorten crystallization time" patented technology

A composite molecular sieve with TON and MFI structures is prepared in static crystallizing condition. In the procedure of preparing gel, less crystal seeds and salt are added. The Si / Al ratio on its crystal lattice is greater than 50.

A phase change memory device includes a lower electrode and a porous dielectric layer having fine pores on the lower electrode. A phase change layer is provided in the fine pores of the porous dielectric layer. An upper electrode is provided on the phase change layer. Related manufacturing methods are also described.

In thin film transistors (TFTs) having an active layer of crystalline silicon adapted for mass production, a catalytic element is introduced into doped regions of an amorphous silicon film by ion implantation or other means. This film is crystallized at a temperature below the strain point of the glass substrate. Further, a gate insulating film and a gate electrode are formed. Impurities are introduced by a self-aligning process. Then, the laminate is annealed below the strain point of the substrate to activate the dopant impurities. On the other hand, Neckel or other element is also used as a catalytic element for promoting crystallization of an amorphous silicon film. First, this catalytic element is applied in contact with the surface of the amorphous silicon film. The film is heated at 450 to 650° C. to create crystal nuclei. The film is further heated at a higher temperature to grow the crystal grains. In this way, a crystalline silicon film having improved crystallinity is formed.

The invention discloses a titanium silicalite TS-1 catalyst preparation method. Cheap inorganic Titanium silicalite is used as raw material, low quantity of tetrapropylammonium hydroxide or tetrapropylammonium bromide is adopted as template agent, and inorganic alkali such as ammonia water is used as alkali source so that the raw materials for preparation have low price and the production cost isgreatly reduced. The precursor preparation process is simple and easy to control, seed crystal is added to reduce the crystallization time and the repeatability is good. As secondary crystallization is adopted, the non-framework titanium is further reduced, and the acid site of the molecular sieve is reduced, the grain size is controllable within certain range, the molecular sieve channel becomessmoother to facilitate direct membrane separation of micrometer crystalline grains, and the obtained Titanium silicalite TS-1 catalyst has large grains, high activity, stable catalytic performance and broad industrial application prospect.

A silicon film provided on a blocking film 102 on a substrate 101 is made amorphous by doping Si+, and in a heat-annealing process, crystallization is started in parallel to a substrate from an an 100 where lead serving as a crystallization-promoting catalyst is introduced.

The invention relates to ZSM-5 molecular sieve with small crystal grains and application thereof, mainly solving the technical problems that the silica-alumina molar ratio (SiO2 / Al2O3) of ZSM-5 molecular sieves with small crystal grains is less than 200, and the traditional ZSM-5 molecular sieves have poor catalyst stability and short service life when used for reaction for preparing propylene from methanol in the prior art. The invention well solves the problems by the technical scheme that the ZSM-5 molecular sieve with small crystal grains, which has a crystal diameter less than 300 microns and a SiO2 / Al2O3 molar ratio not less than 200, is used for reaction for preparing the propylene from the methanol. The invention can be used in industrial production for preparing the propylene from the methanol.

Provided is a method for rapidly synthesizing a silicoaluminophosphate SAPO-34 molecular sieve, wherein triethylamine and / or diethylamine are / is used as templating agents, an organic amine accelerator is added to the initial gel for synthesis at the same time, and the gel mixture is optionally subjected to aging treatment. The method could give SAPO-34 molecular sieves with high crystallization degree in a relative short crystallization period. The SAPO-34 molecular sieve catalysts synthesized by the method can be used in the MTO or DTO reaction, the selectivity of C2~C3 olefins in the product could be up to about 90%.

The invention relates to a method for preparing no-binding agent ZSM-11 zeolite, which mainly aims at overcoming the defects of difficult recovery, easy deactivation and easy aggregation existing in the practical application of the zeolite powder and the problems of small effective surface area and limited diffusion due to the addition of the binding agent in the forming process. In the invention, at least one of diatomaceous earth, carbon white, silicasol or water glass is taken as a silicon source, at least one of aluminum oxide, aluminum salt or aluminate is taken as an aluminum source, and proper quantity of necessary crystal seed guiding agents are added and subjected to pugging, extrusion and forming so as to obtain a precursor mixture with the mass ratio of XNa2O:YAl2O3:100SiO2, wherein x is between 0.5 and 14, and y is between 0 and 6, and the precursor mixture is subjected to hydrothermal crystallization treatment in the water solution containing tetrabutyl ammonium positive ions and converted to the no-binding agent ZSM-11 zeolite. The technical proposal of the invention better resolves the problems, and can be applied to the industrial preparation of the ZSM-11 zeolite molecular sieve catalyst.

A method for synthesizing MCM-22 molecular screen, which possesses MWW topological structure, employing silicon, aluminium, alkali, mould agent and deionized water as reacting raw material, blooming under the temperature of 135-185 Deg C for some time, hydrothermal synthesizing the needed molecular screen; the invention is characterized by using diamin liquid mixture (BA) as mould agent to prepare molecular screen, one (SDAI) is hexamethylene amine (HMI), another (SDA2) is any one of the followings: cyclohexylamine (CHA)or buta (BuA) or isopropyl amine (IPA).

The invention provides a method of synthesizing IM-5 molecular sieve by using a composite template. The method comprises the following steps: (1) dissolving an inorganic base, an aluminum source and two templates in deionized water and carrying out uniform mixing so as to prepare a mixed solution; (2) adding a silicon source into the mixed solution obtained in step (1), optionally adding an additive and carrying out uniform mixing so as to prepare colloid or a solid-liquid mixture; (3) transferring the colloid or the solid-liquid mixture obtained in step (2) to a crystallization kettle, carrying out hydrothermal crystallization at a temperature of 120 to 200 DEG C for 1 to 10 d, carrying out cooling after crystallization and rinsing, filtering and drying the obtained mixed liquor so as to obtain raw powder of the IM-5 molecular sieve. A mole ratio of reactants satisfies the equation of SiO2: Al2O3: M2O: R1: R2: H2O = 60: 0.4-6: 6-21: 0.6-18: 0.6-12: 300-1800, wherein M2O is an alkali metal oxide, R1 is a first template, and R2 is a second template. The method provided in the invention widens the range of mixing ratios of raw materials, improves yield of a single kettle and enables time for crystallization to be further shortened and enlarged production to be easier.

An IM-5 molecular sieve synthesis method comprises the following steps: 1, dissolving an inorganic alkali, an aluminum source and a template in deionized water, and uniformly mixing to prepare a mixed solution; 2, adding a solid silica gel to the mixed solution obtained in step 1, adding a template precursor, and uniformly mixing to prepare a colloid or a solid-liquid mixture; and 3, transferring the colloid or solid-liquid mixture obtained in step 2 to a crystallization kettle, carrying out hydrothermal crystallization for 1-10 days, cooling after the crystallization to obtain a mixed liquid, and washing, filtering and drying the mixed liquid to obtain raw IM-5 molecular sieve powder, wherein reactants comprise SiO2, Al2O3, M2O, R, A and H2O, a molar ratio of SiO2:Al2O3:M2O:R:A:H2O is 60:(0.3-6):(6-20):(4-15):(1.2-6):(300-1200), M2O is an alkali metal oxide, R is the template, and A is the template precursor. The IM-5 molecular sieve synthesis method has the advantages of good product repeatability, effective reduction of the water content, increase of the concentration of the template, crystallization time shortening and single kettle yield increase.

The invention aims at providing a pantoprazole sodium freeze-dried powder injection and comprises pantoprazole sodium and mannitol with the weight ratio of 1: 2 to 5. The invention is simple in formula and little in side effect; products prepared by the method are plump in appearance, good in complex solubility and excellent in quality with the adoption of an advanced freezing and drying process.

The invention discloses a preparation method for mordenite with a high Si / Al ratio and a small crystal particle, which comprises the following steps of: firstly, dissolving an Al source in sodium oxide solution; after an Si source is added, stirring and dispersing for certain time at room temperature and under strong magnetic force; mixing the Al source solution and the Si source solution which are evenly dispersed into glue at the room temperature; adding inorganic lamellar precursors, such as lamellar zeolite molecular sieves, lamellar silicate and the like to serve as seed crystal; after mixture is stirred and mixed evenly at the room temperature and under the strong magnetic force, transferring into a reaction crystallization kettle; at the temperature of 150-170DEG C, carrying out crystallization reaction for 0.5-3 days; and obtaining a solid product after common suction filtration, washing and drying. The synthesis method disclosed by the invention has the characteristics that expensive organic amine template is not used as structure-directing agent, and instead, the easily-obtained inorganic lamellar precursors with abundant source and low price are used as the seed crystal to directly synthesize a mordenite molecular sieve with the high Si / Al ratio. The prepared nanometer mordenite molecular sieve has the advantages of high degree of crystallinity and purity, controllable particle size and morphology, low cost and small environment pollution, and is convenient for industrially producing on a large scale.

The invention provides a synthesis method of an IM-5 molecular sieve. The method comprises the steps of: (1) under a stirring condition, contacting an aluminum source-containing mixed solution with a silicon source to make a colloid, with the aluminum source-containing mixed solution being an aqueous solution containing inorganic alkali, a mineralizer, an aluminum source and a template agent; and (2) under crystallization reaction conditions, subjecting the colloid to hydrothermal crystallization. According to the composition of the colloid, the mole ratio of the inorganic alkali, the mineralizer, the aluminum source, the template agent, the silicon source and water satisfies the following formula: SiO2:Al2O3:M2O:MX:SDA:H2O=10:(0.1-1):(1-10):(0.1-5):(0.1-4):(50-500). The silicon source is SiO2, the aluminum source is Al2O3, the inorganic alkali is M2O, MX is the mineralizer, and SDA is the template agent. The mineralizer is a metal halide able to regulate the molecular sieve crystal growth. The method can be used for preparing the IM-5 molecular sieve with enhanced crystallinity.

The invention relates to a doping modified phase change material and a phase change storage unit containing same and preparation thereof. The formula of the doping modified phase change material is (Sb2Se3)100-xYx, wherein, x is the atom percentage of an element and is more than 0 and less than or equal to 20, and Y is a doped element and is any one of Ni, Cr, Bi, As, Ga, In, Ge, Si, Sn, Ag, Al, C, N and O. The doping modified (Sb2Se3)100-xYx storage material not only remains the advantages of the fast phase change speed and the low melting point of Sb2Se3 storage material, but also increases crystallization temperature, thus overcoming the disadvantage of poor data retentivity of the Sb2Se3 storage material. The phase change storage containing the (Sb2Se3)100-xYx storage material has the advantages of high speed, low power consumption and favorable data retentivity and the like.

A silicon film provided on a blocking film 102 on a substrate 101 is made amorphous by doping Si+, and in a heat-annealing process, crystallization is started in parallel to a substrate from an area 100 where nickel serving as a crystallization-promoting catalyst is introduced.

The invention relates to a method for preparing a NaY molecular sieve with a high aluminum-silicon ratio, which comprises the following steps of: mixing a silicon source, an aluminum source and deionized water, uniformly mixing two guide agents in different molar ratios, water glass, acidic aluminum salt and sodium aluminate solution in a molar ratio of gel materials to prepare two gels, and crystallizing respectively, wherein the molar ratio of the gel materials is (1.0-6.5)Na2O:Al2O3:(5.0-18)SiO2:(100-280)H2O, and Al2O3 in the guide agents accounts for 0.01 to 15 percent of the total weightof Al2O3; uniformly mixing the two gels in a mass ratio of 1:(0.1-10) to prepare a mixed gel; and crystallizing the prepared mixed gel at the temperature of between 80 and 120 DEG C for 2 to 50 hoursto prepare the NaY molecular sieve. Compared with the prior art, the method has the advantages that: the NaY molecular sieve with the high aluminum-silicon ratio can be prepared in shorter time underthe condition of the same feeding molar ratio.

The invention relates to a method for synthesizing fly ash zeolite by an alkali fusion-microwave process, particularly a method for synthesizing zeolite by utilizing industrial solid waste fly ash. In the invention, fly ash is used as a main raw material, NaOH is used as an activating agent, and an alkali fusion-microwave process is used for preparing the zeolite product. In the method, an ultrasonic dispersion process enables the activating agent to sufficiently contact the fly ash, and calcination enables the fusion reaction of the fly ash and the activating agent at high temperature, thereby increasing the conversion rate of the zeolite; the introduction of the 4A zeolite can enhance the purity of the 4A fly ash zeolite and reduce the generation of impure crystals; and microwaves are used for heating in the crystallization process, thereby greatly shortening the crystallization time of the zeolite. The method is simple to operate, has the advantages of simple equipment, short reaction time and energy saving, is convenient, feasible and practical, is suitable for industrial production of synthetic zeolite from fly ash, and develops a new way for comprehensive and cyclic utilization of fly ash.

The present invention is a meltblown fiber and a fabric manufactured from the fiber comprising reactor grade polypropylene having a melt flow rate of from 100 to 5000 and having less than 50 stereo defects per 1000 units. Further, the polypropylene is typically produced from a metallocene catalyzed process, the metallocene being at least one bridged 2,4 di-substituted indenyl metallocene in one embodiment, and a bridged 4-phenyl indenyl metallocene in another embodiment. The metallocene is part of a system that can include a fluorided support and a non-coordinating anion activator.

The invention relates to a preparation method of a molecular sieve, and provides a method for preparing ZSM-22 molecular sieve by using a seed crystal synthesis method. The method comprises the following steps of: uniformly mixing deionized water with aluminum sulfate; adding alkali sources into a mixture; adding tetraethoxysilane under stirring; continuously stirring until the solution is uniform to form silicon-aluminum gel; adding ZSM-22 molecular sieve crystal seed to stir; putting the mixture into a reaction kettle for crystallization reaction; and filtering and drying a product to obtain ZSM-22 molecular sieve raw powder. By using the preparation method, the application of organic template agent is eliminated, the crystallization time is shortened, the crystallization temperature is reduced, and the industrial application is facilitated; the product keeps good crystallization degree and purity and high catalytic reaction activity; the unnecessary loss during production is reduced; the product has a potential application value on some important catalytic reaction; and inorganic raw materials used in production is environmentally-friendly and low in cost.

The invention relates to a preparation method of a ZSM-11 molecular sieve. The method comprises steps of: using an EU-1 molecular sieve as a seed; adding an EU-1 molecular sieve powder into a solution containing sodium hydroxide and a template; stirring uniformly and adding a silicon source to obtain a reaction mixture gel system, wherein a molar ratio of other components needed to be added into the reaction mixture gel system for per 100g of EU-1 molecular sieve seed is as below: 0-0.5 Na2O:0.8-5.0 SiO2:0.1-0.5 (TBA)2O:100(g)EU-1:20-110 H2O; crystallizing the reaction mixture gel under an enclosed condition at 120-180 DEG C for 36-72 h to obtain the ZSM-11 molecular sieve. Compared with a prior art, the invention has shortened crystallization time and reduced synthesis cost.

The invention relates to a cubic mesoporous molecular sieve catalyst with micropore canals, a preparation method and use thereof. The catalyst comprises the raw materials of an aluminium source, a silicon source, sodium hydroxide, a template, surfactant and de-ionized water, and is prepared through the following steps: firstly preparing a silicon-aluminium precursor; and then utilizing a self-assembly function between the precursor and the surfactant to obtain stable molecular sieve materials. The preparation method comprises two methods of hydro-thermal synthesis and microwave synthesis. Dueto the adoption of the microwave synthesis method, the cubic mesoporous molecular sieve catalyst in the invention has the advantages of shortening the crystallization time, obtaining a synthesized molecular sieve with a cubic mesoporous structure, having micropore canals, having acid strength similar to that of a ZSM-5 molecular sieve, and having relatively higher catalytic activity when used forthe catalytic cracking reaction of 1,3,5-tri-isopropyl benzene.

The invention provides a clindamycin phosphate freeze-dried powder injection, which is prepared by the steps that: clindamycin phosphate solution is added with NaOH and is freeze-dried, wherein, the weight ratio of clindamycin phosphate to the NaOH is between 12 and 18 to 1, and the preferred weight ratio is 16.5 to 1. The clindamycin phosphate freeze-dried powder injection has simple formula and less auxiliary materials, overcomes side effects due to the fact that the auxiliary materials are excessively added, and ensures that patients are safer for use.

The present invention relates to the technical field of a zeolite molecular sieve synthesis, concretely speaking, relating to a preparation method of a zeolite molecular sieve of a nano heteroatom. A sodium silicate or a soluble glass, an inorganic acid, an inorganic ferric salt, an organic amine and deionized water serve as the material. After the steps of liquor preparation, two variable temperature crystallizations, washing-up centrifugalization, drying and roasting, the zeolite molecular sieve of nano Fe-ZSM-5 is produced with a grain size less than 100nm. The present invention can be used in the petrochemical industry, fine chemical industry and the environmental protection field.

The invention discloses a synthesis method of an SAPO-34 molecular sieve. The method includes the following steps of: (1) uniformly mixing a template agent, aluminum source, silicon source and water to obtain mixed liquid; (2) adding the solid-state seed crystal of raw powder of the SAPO-34 molecular sieve not less than 0.1 time of the mass of SiO2 in the silicon source to the mixed liquid obtained in the step (1) and mixing uniformly to obtain mixed liquid; (3) adding phosphorus source to the mixed liquid obtained in step (2) and mixing uniformly to obtain mixed liquid; (4) filling the mixed solution obtained in step (3) in a crystallization kettle and crystallizing at crystallization temperature; and (5) conducting centrifugal separation and filtration of the crystallized mixed solution and finally obtaining SAPO-34 raw powder after drying solid samples. The method mainly solves the problems of high cost of catalyst preparation and serious pollution caused by large amount of the template agent used for synthesizing the SAPO-34 molecular sieve in the prior art.

The invention discloses a super-hydrophobic polypropylene film and a preparation method thereof. The method comprises the following steps: firstly, weighing a definite amount of isotactic polypropylene granules and adding the granules into dimethyl benzene, rising the temperature to 130 DEG C, and stirring the solution by magnetic force to form 1 to 50mg / mL polypropylene solution; secondly, adding 20 to 60 percent of acetone by the volume of the solution into the polypropylene solution, and quickly stirring the solution; and finally, coating the polypropylene solution added with the acetone on a substrate by adopting a coating method, and drying the substrate for 3 to 12 hours at a temperature of between 20 and 70 DEG C to obtain a white film, namely the super-hydrophobic polypropylene film. The method has the advantages of simple operation, low cost and good controllability, does not need complex chemical treatment or expensive equipment, and is easy for industrialization. The obtained super-hydrophobic polypropylene film has the characteristics of better surface structure stability, weather-proof durability, chemical corrosion resistance and the like.

A method for producing a transparent conductive film including a transparent film substrate and a crystalline transparent conductive layer, including: a first depositing a first indium-based complex oxide having a first tetravalent metal element oxide on the transparent film substrate; and a second depositing indium oxide or a second indium-based complex oxide and lower than the tetravalent metal element oxide content of the indium-based complex oxide used in the first depositing by sputtering to form an amorphous transparent conductive layer, and crystallizing the amorphous transparent conductive layer. The method allows a reduction in crystallization time.

The invention relates to a synthetic method for a hierarchical-pore ZSM-5 molecular sieve. The method synthesizes the hierarchical-pore ZSM-5 molecular sieve with a high crystallization degree, strong acidity and good hydro-thermal stability from a small amount of a microporous template and a polymer of quaternary ammonium salt without usage of a hard template.

The invention relates to a method for preparing mesoporous gamma-Al2O3 by a dynamic hydrothermal method, belonging to the field of preparation of inorganic porous materials. The invention aims to solve the problems that in the prior art, reaction steps are multiple, experimental conditions are difficult to control, products are incompletely crystallized, the reaction time is too long, and a static reaction does not facilitate full contact among reaction materials. The method comprises the following steps of: adding inorganic aluminum salt and a precipitating agent into surfactant solution respectively, and uniformly mixing the inorganic aluminum salt with the precipitating agent; continuously stirring the mixed solution, and performing hydrothermal treatment; and washing and calcinating obtained products after finishing the reaction, and thus obtaining the mesoporous gamma-Al2O3. The method has the advantages that: the reaction is performed more fully, the formation of alumina precursors can be simply controlled, the formation of mesoporous alumina can be effectively controlled, the crystallization time is shortened to be less than 24 hours, the preparation period is short, and the method is suitable for large-scale continuous production.