161results about How to "Improve the crystallization process" patented technology

Fibrous sheets are coated or impregnated with a biodegradable composition to render the sheets more resistant to penetration by liquids. Biodegradable polymer blends suitable for use in coating or impregnating a fibrous sheet can be manufactured from at least one “hard” biodegradable polymer and at least one “soft” biodegradable polymer. “Hard” biopolymers typically have a glass transition temperature of at least about 10° C. “Soft” biodegradable polymers typically have a glass transition temperature less than about 0° C. Another useful biodegradable polymer composition includes one or more biodegradable polymers and sufficient inorganic filler so as to render the treated sheet microwaveable. The biodegradable polymer compositions are especially well-suited for coating or impregnating paper sheets, e.g., 12–15 lb / 3000 ft2 tissue paper to yield food wraps. Food wraps will typically be manufactured to have good “dead-fold” properties so as to remain in a wrapped position and not spring back to an “unwrapped” form.

The present invention relates to a purified, easily produced poly-beta-1->4-N-acetylglucosamine (p-GlcNAc) polysaccharide species. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a beta-1->4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. In addition, derivatives and reformulations of p-GlcNAc are described. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources. Still further, the invention relates to methods for the derivatization and reformulation of the p-GlcNAc. Additionally, the present invention relates to the uses of pure p-GlcNAc, its derivatives, and / or its reformulations.

The invention provides an aliphatic polyester formed item having transparency and crystallinity in combination by crystallizing, in the course of or after processing, an aliphatic polyester composition comprising aliphatic polyester and one or more transparent nucleating agent selected from the group consisting of aliphatic carboxylic acid amide, aliphatic carboxylic acid salt, aliphatic alcohol and aliphatic carboxylic acid ester having a melting point of 40-300° C.

The invention discloses a device and method for recovering nitrogen and phosphor in the wastewater by the ammoniomagnesium phosphate crystal method. The invention adopts an MAP nitrogen and phosphor recovery device which has a two-stage agitation of a magnetic stirring apparatus and a deposit catcher, then the wastewater of 3 / 5 to 4 / 5 of the volume of the device is added as the reactant liquor, then add magnesium source and phosphorus source regulation reaction liquor with the ration of NH4<+>: PO4<3->: Mg<2+> equal to 1:1:1 to 1:1.2:1.2, then alkali liquor is dropped continuously to maintain the PH value of the reaction liquor at 9.0 plus / minus 0.1, the magnetic stirring apparatus rotates at the speed of 400-600 r / m and the deposit catcher is driven by a motor stirrer and agitates continuously at the speed of 40-60 r / m, and finally the MAP can be obtained. The invention overcomes the problem that the activity of the crystal-forming ions drops when the PH value decreases during the crystallization process, promotes the MAP crystallization process and improves the MAP recovery rate; the magnetic stirring apparatus and the deposit catcher adopted in the MAP recovery device reduces the stirring dead area in the reactor, the reaction liquor is stirred more sufficiently, which is favorable for the MAP crystal-forming ions to form crystal; the deposit catcher that is designed to catch MAP is favorable to improve the MAP purity in the recovered products.

The present invention relates to the preparation of nanocrystalline zeolite beta by a modified aerogel protocol comprising four steps, namely, hydrolysis, nucleation, crystallization and supercritcal drying.

This invention provides a method for forming a microcrystalline silicon film, which employs a three-stage deposition process to form a microcrystalline film. A microcrystalline silicon seed layer is formed on a substrate. Gaseous ions are used to bombard a surface of the microcrystalline silicon seed layer. Microcrystalline silicon is formed on the microcrystalline silicon seed layer after the bombardment to a predetermined thickness.

A method for producing highly crystalline and stable microparticles of an active substance with a very narrow size distribution. The microparticles being crystallized out of a suspension made of primary particles of the active substance, a solution of the active substance, a non-solvent for the active substance and inert formed pieces. The resulting microparticles hare highly stable largely independent of the physiochemical properties of the active substance and can be especially suitable for fast release dosage forms of pharmaceuticals.

The invention relates to a preparation method of cefdinir, comprising the following steps: reacting 7-amino-3-vinyl-8-oxy-5-thia-1- nitric heterocyclic dicyclo[4.2.0]octyl-2-en-2-carboxylic acid with (Z)-2-(2-aminothiazole-4-yl)-2-acetoxy imino thioacetic acid (S-2-benzothiazole)ester in the presence of organic base at low temperature; extracting, adjusting p H value, preparing the intermediate of the cefdinir, removing the ester-group protective group of the intermediate of the cefdinir to obtain the cefdinir. The preparation method uses the low-temperature reaction technique, capable of increasing the reaction yield and reducing the impurities generated by the high temperature reaction. The hydrolysis and crystallization process is very easily controlled. The used alcohols, ketones or esters solvent is easily recovered, thus the production cost and the three-wastes drain are reduced, therefore the pollution to the environment is reduced. The preparation method of cefdinir is suitable for large-scale production.

A layered heterostructured coating has functional characteristics that enable the controlled release of volatile agents. The coating has photocatalytic properties, since it uses titanium dioxide, its derivatives or materials with similar photocatalytic properties (2), which upon solar irradiation open and / or degrade nano or microcapsules (3) and subsequently releases in a controlled form the volatile agents contained in them.

Provided are a The molecular formulas are as follows: [Cu(3-bpah)(5-MIP)].2H20; [Ni(3-bpah)(5-MIP)].H20; [Co(3-bpah)(5-MIP)].H20; [Cu(4-bpah)(5-MIP)(H20)]; [Ni(4-bpah)(5-MIP)(H20)].H2O; [Co(4-bpah)(5-MIP)]. Transition metal chlorides, semi-rigid bispyridine bisamide ligands and 5-methyl isophthalic acid are added into deionized water, after pH adjustment, the above mixture is reacted under hydrothermal conditions, and products are obtained. The transition metal compounds are advantageous in that the transition metal compounds have a simple synthetic method, have strong affinity to organic pollutants of methylene blue, methyl orange and rhodamine B, and have good catalytic degradation effects.

This invention relates to an organic electroluminescent element comprising a substrate, an anode, an organic layer and a cathode placed in layer one upon another; at least one layer in the organic layer is a luminescent layer comprising a host agent and a doping agent and an azole compound having an oxadiazole structure and a triazole structure in its molecule is used in at least one layer in the organic layer. This azole compound is used as a host agent in the luminescent layer and it can also be used in a hole blocking layer or electron transporting layer. This organic EL element is suitable for use in full-color and multicolor panels and shows a higher luminous efficiency and better driving stability than EL elements utilizing the luminescence from the singlet state.

The invention discloses a polyolefin core pipe and a preparation method thereof. The core pipe is obtained by mixing two kinds of high isotacticity of propylene homopolymers according to the weight proportion of 1 to 45 : 99 to 55 and adding maleic anhydride grafted polypropylene and flow processing aids for mixing evenly and through two-steps extrusion, cooling, extension, molding and cutting. The invention adopts the two kinds of high isotacticity of propylene resin with different molecular weights and the flow processing aids to promote the polymer macromolecule chain nucleation and the chain migration and diffusive capacity, speeds up polypropylene crystallization process and improves the processability and the mechanical property of polyolefin; the maleic anhydride grafted polypropylene and a filling reinforcing system intensify the physical and chemical action between fillers and polypropylene resin and between polypropylene resin to strengthen the hardness, rigidity and durability of polypropylene tubular products. The prepared core pipe with 75mm to 360mm of inside diameter and 7mm to 30mm of wall thickness can replace various paper core pipes, thereby having a wide popularization and application prospect.

The invention relates to a cobalt complex based on a flexible bipyridine bisamide ligand and benzenedicarboxylic acid, a synthesis method and application thereof. The molecular formula of the cobalt complex is: [Co(L<1>)0.5(5-AIP)]; [Co(L<3>)(5-AIP)]; [Co2(L<1>)2(1, 3-BDC)2].4H2O; and [Co2(L<2>)1.5(1, 2-BDC) (mu2-OH)(mu3-OH)(H2O)].H2O. The synthesis method includes: adding cobalt chloride, the flexible bipyridine bisamide ligand and benzenedicarboxylic acid into deionized water, adjusting the pH value, pouring the mixture into a high-pressure reaction kettle to undergo hydrothermal reaction, and carrying out washing and airing, thus obtaining the cobalt complex based on the flexible bipyridine bisamide ligand and benzenedicarboxylic acid. The cobalt complex provided by the invention has the advantages of: simple synthesis method, easy crystallization, high synthesis yield, strong affinity to water soluble pollutants, good catalytic degradation effect, and exhibition of anti-ferromagnetic coupling behavior, and can be applied as a photocatalytic material and magnetic material.

The invention discloses a forming device and a forming method of electromagnetic induction assisting prestress. A forming mold and a manipulator are fixed on the upper portion of a base. An electromagnetic coil is mounted at the chuck part of the manipulator, wire connecting of an electromagnetic induction control system is completed correspondingly, the electromagnetic coil is ensured to generate a pulsed magnetic field successfully in the forming process, and induced current is generated on a sheet material. The sheet material is placed on the mold, and a vacuum bag is placed on the sheet material and is evacuated through an evacuating device, so that the sheet material is pressed on the mold tightly, and effect of vacuum compaction is achieved. A computer control system is operated to form the electromagnetic induction assisting prestress. According to the forming device, when the pulsed magnetic field of the inducing coil penetrates a workpiece, the workpiece generates the induced current, plastic deformation capacities of metal materials are improved by the current, crystallizing process of amorphous alloy is promoted, solidification structure of the alloy is refined, deforming resistance during the forming process is reduced, springback amount is reduced, forming accuracy and comprehensive mechanical properties are improved.

The present invention relates to a purified, easily produced poly-β-1→4-N-acetylglucosamine (p-GlcNAc) polysaccharide species. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a β-1→4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. In addition, derivatives and reformulations of p-GlcNAc are described. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources. Still further, the invention relates to methods for the derivatization and reformulation of the p-GlcNAc. Additionally, the present invention relates to the uses of pure p-GlcNAc, its derivatives, and / or its reformulations.

Fibrous sheets are coated or impregnated with a biodegradable composition to render the sheets more resistant to penetration by liquids. Biodegradable polymer blends suitable for use in coating or impregnating a fibrous sheet can be manufactured from at least one type of polyhydroxybutyrate, optionally in combination with at least one additional biodegradable polymer (e.g., a “hard” biodegradable polymer having a glass transition temperature of at least about 10° C. and / or a “soft” biodegradable polymer having a glass transition temperature less than about 0° C. Sufficient inorganic filler may be included so as to render the treated sheet microwaveable. The biodegradable polymer compositions are especially well-suited for coating or impregnating paper sheets, e.g., 12-15 lb / 3000 ft2 tissue paper to yield food wraps. Food wraps will typically be manufactured to have good “dead-fold” properties so as to remain in a wrapped position and not spring back to an “unwrapped” form.

A copper complex based on dipyridine piperazine organic ligand and Anderson type polyacid, and a synthesis method and application thereof. The molecular formula of the complex is one selected from the followings: H[Cu2L1Cr(OH 6Mo6O18 (mu2-OH)2].4H2O, and [Cu2L2Cr(OH)6MoVI5MoVO18 (H2O)4].4H2O. The method is as below: adding copper salt, Anderson type polyacid, and dipyridine piperazine organic ligand into deionized water, stirring at room temperature, adjusting the pH value, insulating under hydrothermal conditions in a high-pressure reaction kettle, cooling to room temperature to produce massive dark green crystals, cleaning and drying, so as to prepare the copper complex based on dipyridine piperazine organic ligand and Anderson type polyacid. The synthetic method of the complex is simple, easy for crystallization and high in synthesis yield, the complex has strong affinity and good photocatalytic degradation effect on water-soluble pollutants, and can be used as photocatalytic materials.

A crystalline polyolefin blend comprising dispersed polyhedral oligomeric silsesquioxane (POSS) nanoparticles has improved packing of chains, high draw-down ratios, as well as improved tensile and yield strength. The blend is made by melt blending the polyolefin with the POSS in the presence of a sorbitol nucleating agent and cooling the mixture so that the nucleating agent serves as a template for the in-situ self assembly of dispersed POSS nanoparticles and the formation of very small crystalline polyolefin sites.

The invention relates to a method for synthesizing a pure silicon ITQ-13 molecular sieve and an aluminium silicon ITQ-13 molecular sieve. The synthesis of the pure silicon ITQ-13 molecular sieve is characterized in that white carbon black is taken as silicon source while the synthesis of the aluminium silicon ITQ-13 molecular sieve is characterized in that the white carbon black is taken as the silicon source, and aluminium isopropoxide or aluminium nitrate nona-hydrate is taken as aluminum source. The method of the invention overcomes the defects that the aluminium silicon ITQ-13 molecular sieve is difficult to be directly synthesized, the synthesis procedures are complex and the repeatability is poor by the previous synthesis method.

The invention belongs to the technical field of chemical engineering, and concretely relates to a method for synthesizing zeolite molecular sieve or SAPO molecular sieve, and an apparatus thereof. The synthesis method is characterized in that a gas-solid phase reaction of amorphous nonmetal oxide reactant dry glue in a pressure reactor is carried out in continuously flowing directing agent steam to form the zeolite molecular sieve or SAPO molecular sieve, the liquid hourly space velocity of the continuously flowing directing agent steam before vaporization is 1-50hr<-1>, the pressure in the pressure reactor is 0.1-1.5MP, and the reaction temperature is 100-200DEG C; and the directing agent steam discharged from the outlet of the reactor undergoes pressure reduction to normal pressure, and is cooled to a liquid which can be recycled. The synthesis reaction temperature and pressure, the composition of the above directing agent and the flow velocity of the steam can be adjusted, the crystallization process can be accelerated, and the obtained product has the advantages of pure phase, perfect crystal form, and small and uniform crystal grain size. The directing agent can be recycled, no waste gas or waste liquid is discharged, and realization of low-cost environmentally friendly large-scale industrial production is facilitated.

The present invention relates to the preparation of nanocrystalline zeolite beta by a modified aerogel protocol comprising four steps, namely, hydrolysis, nucleation, crystallization and supercritcal drying.

The invention discloses a preparation method for a piece of CZTS (Se) nano-crystalline thin film. The preparation method includes that preparing binary nano-crystalline particles of tin, zinc and copper, mixing the binary nano-crystalline particles and dispersing in solvent to prepare reaction precursor solution, and transferring the reaction precursor solution to the surface of a substrate to perform heat treatment to obtain the CZTS (Se) nano-crystalline thin film. The CZTS (Se) nano-crystalline thin film prepared by the method is less in impurity and defect, when the CZTS (Se) nano-crystalline thin film is used as the absorption layer of a solar cell, the conversion efficiency of the solar cell can be obviously improved; the preparation method does not use toxic substances (hydrazine and oleylamine) as solvent, and accordingly the preparation method is friendly to the environment.

In a laser annealing process for transforming a noncrystalline semiconductor film into a laterally-crystallized film: irradiation of a region with laser light and a shift of the position of the region to be irradiated are repeated, where the shift is made so that each region to be irradiated contains a subregion of granular crystals produced by previous irradiation and a subregion of noncrystalline semiconductor material which has not yet been crystallized, and the shifted region is irradiated under such a condition that the granular crystals and the noncrystalline semiconductor material which are contained in the second region are transformed into lateral crystals without melting one or more regions of lateral crystals produced in the semiconductor film by previous irradiation.

The invention provides a method for enhancing crystallinity and mechanical performance of a polymer, a device and an obtained product and belongs to the technical field of polymer materials. The method comprises the steps as follows: a polymer product is placed in a closed container; a fluid under certain pressure is introduced into the closed container; after the fluid pressure is stabilized andthe fluid is left to stand for a period, the fluid pressure is relieved; then, the closed container is opened, and the polymer product treated by the fluid medium is taken out; the polymer product isleft to stand in an air or vacuum environment for a period to remove the fluid medium dissolved or left in the polymer, and a semi-crystalline polymer product with crystallinity and mechanical performance improved significantly is obtained finally. Compared with traditional thermal treatment based methods for enhancing crystallinity and mechanical performance of polymers, the method has the advantages that the treatment process can be performed in a lower-temperature environment, so that high-temperature degradation of the polymer can be effectively avoided, mechanical load is not required, and energy loss in the production process is greatly reduced.

A method of forming an organic thin film transistor comprising source and drain electrodes with a channel region therebetween, a gate electrode, a dielectric layer disposed between the source and drain electrodes and the gate electrode, and an organic semiconductor disposed in at least the channel region between the source and drain electrodes, said method comprising: seeding a surface in the channel region with crystallization sites prior to deposition of the organic semiconductor; and depositing the organic semiconductor onto the seeded surface whereby the organic semiconductor crystallizes at the crystallization sites forming crystalline domains in the channel region.

The invention discloses a method for preparing potassium sulfate from sodium sulfate. The method is characterized by comprising the following steps: (1) performing a reaction by taking the salt lake sodium sulfate and potassium chloride as raw materials and a water-alcohol system as a solvent, performing a reaction under a room temperature for a period of time, performing filtration to obtain aphthitalite and a mother liquid A, performing concentration on the mother liquid A, performing crystallization, and performing vacuum filtration to obtain sodium chloride and a filtrate A; and (2) weighing the aphthitalite and potassium chloride, performing a reaction by taking a water-alcohol system as a solvent to obtain the potassium sulfate and a mother liquid B, performing concentration on the mother liquid B, performing crystallization, and performing vacuum filtration to obtain sodium chloride and a filtrate B. Compared with the prior art, the method provided by the invention reduces the production energy efficiency, shortens the production time, and improves the yield of the potassium sulfate.

The invention relates to a polymer photoelectron film, a preparation method and application thereof. The polymer photoelectron film includes a polymer film loaded on a substrate, wherein a layer of conductive modified film is arranged between the substrate and the polymer film; the substrate includes glass covered by tin indium oxide (ITO), glass covered by fluoro indium oxide, glass covered by semitransparent silver film and glass covered by semitransparent gold film; the loaded polymer film includes Poly (3-hexylthiophene), PCBM and MEH-PPV; and the conductive modified film is PEDOT: sodium polystyrene sulphonate. The preparation method includes the steps of cleaning the substrate, modifying the substrate, loading the polymer film on the modified substrate, and controlling the volatilization time and the annealing heat treatment of dissolvent in the polymer film. The invention has the advantages that the performance of the prepared polymer photoelectron film is obviously higher than that of polymer film prepared under normal pressure, the performances of the solar cells and other semiconductor devices can be greatly improved, and the market competitiveness can be strengthened; and the invention has low cost and simple operation, and can be easily combined with the traditional semiconductor production process.

The invention relates to a method for synthesis of a nanometer ZSM-5 molecular sieve from mother liquor flocculate and belongs to the field of chemical engineering. The method comprises carrying out flocculation on a ZSM-5 molecular sieve crystallization mother liquor, separating the flocculate, drying the flocculate and recycling the flocculate as a ZSM-5 molecular sieve synthesis raw material. The method flocculates unreacted effective ingredients in the ZSM-5 molecular sieve crystallization mother liquor, recycles the flocculate, prevents synthesis waste liquid discharge, reduces environment pollution, recovers and recycles the mother liquor, saves raw materials and reduces a molecular sieve synthesis cost. Microcrystallines are formed in the mother liquor flocculate after the reaction so that a nucleation rate and quantity of crystal nucleuses in an induction period of crystallization are greatly improved, molecular sieve nucleation activation energy is reduced, crystallization time is shortened, the molecular sieve crystal grain size is reduced and a molecular sieve crystallization degree is improved.