Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
43results about How to "Overcoming the problem of low yield" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Method for separating and purifying sea-mussel mucin by using mixing adsorption chromatography
ActiveCN101348520AOvercoming the problem of low yieldHigh yieldPeptide preparation methodsAnimals/human peptidesHigh concentrationChromatographic separation
The invention relates to a method for separating and purifying mussel mucin by using a mixed adsorption chromatography. Mussel mucin contains a group of L-3,4- -Dihydroxyphenylalanine (L-DOPA), a phenohydroxyl group thereof can act as the supplier for hydrogen bond, the benzene ring thereof can generate a hydrophobic effect, and the lysine thereof with strong positive charges is capable of forming a static bond. On the basis of the properties of mussel mucin, a mixed adsorption chromatography (i.e. the adsorption chromatography based on three principles of adsorption with hydrogen bond, adsorption with hydrophobic effect, and static adsorption) is adopted to overcome the problem of low yielding rate of mussel mucin in the prior art for separating and purifying mussel mucin. An strong acid extraction is adopted to eliminate small-molecular compounds from a desalting column, an argar medium with high concentration and high cross-linking degree to separate and purify mussel mucin, and an acetic acid-urea- polyacrylamide gel electrophoresis is used to differentiate mussel mucin through specific chromogenesis with nitro blue tetrazolium. Three principles adopted with one separation medium to separate mussel mucin achieve high selectivity, simplify the purification technology, and decrease production cost.
Owner:JIANGYIN USUN BIOCHEMICAL TECH CO LTD
Method for preparing nano hydroxyapatite powder
InactiveCN101734635ANo pollution in the processNo harmNanostructure manufacturePhosphorus compoundsWater bathsPolyethylene glycol
The invention relates to a method for preparing nano hydroxyapatite powder, belonging to the field of the biomedical material. The method for preparing the nano hydroxyapatite powder comprises the following steps: adding the organic polymer of polyethylene glycol to the initial reactants of calcium nitrate and diammonium phosphate solution to adjust and control the morphologies of the products of reaction; adding aqueous ammonia to adjust the pH values of the products of reaction, and making the aqueous ammonia react with the products of reaction at different water bath temperature to synthesize nano hydroxyapatite precipitate, wherein the agglomeration of the synthesized nano hydroxyapatite precipitate can be inhibited by the polyethylene glycol functioning as the dispersant; freezing and drying synthesized nano hydroxyapatite precipitate slurry to obtain dry nano hydroxyapatite powder which contains by-products of reaction and polyethylene glycol, and calcinating the dry nano hydroxyapatite powder at high temperature to remove the by-products of reaction and the polyethylene glycol which are contained in the dry nano hydroxyapatite powder to obtain the nano hydroxyapatite powder which is in the shape of the ball or the rod and in the particle size of 10-100 nm and has high yield and good dispersion. The method for preparing the nano hydroxyapatite powder is simple, needs short preparing period, causes no poison and pollution and is suitable for industrial production.
Owner:SICHUAN UNIV
Method for preparing artificial quartz
InactiveCN101480810ASimple manufacturing processReduce energy consumptionMixing operation control apparatusCeramic shaping apparatusPolymer scienceAccelerant
The invention discloses a preparation method for synthetic quartz. The raw materials of the preparation method comprise quartz sand of 10 to 80 meshes, quartz sand of 80 to 200 meshes, quartz sand of 200 meshes, quartz of 325 meshes, unsaturated resin, accelerants, solidified agents and coupling agents. The preparation method comprises the following steps: unsaturated resin and color paste are stirred, the quartz sand is added into the unsaturated resin from small size to big size and is uniformly stirred with the unsaturated resin,, the accelerants, the coupling agents and the solidified agents are added in the mixture of the quartz sand and the unsaturated resin and are stirred uniformly, the mixture is injected into a forming mold and is put in the vacuum environment of 0.097MPa to -0.1MPa for about eight minutes, and then the product is naturally solidified under normal temperature and normal pressure, and is dimensioned, thickened and polished to obtain the finished product.
Owner:上海贵雅橱柜有限公司 +1
Granular material optical color sorter
InactiveCN101279321AOvercoming the problem of low yieldIncrease productionSortingControl systemEngineering
The invention relates to a grain material optical color selector which comprises a discharge chute, an image collecting system, a blowing system as well as an information treating control system. The observing area of the image collecting system is arranged on a material moving track limited by the discharge chute; the information treating control system is respectively connected with the image collecting system and the blowing system in a signaling way used for identifying the grains with different colors according the image digital signals of the image collecting system and controlling the blowing system to carry out corresponding blowing actions. The blowing system is provided with a plurality of blowing nozzles; the blowing path of each blowing nozzle passes through the material moving track limited by the discharge chute; the crossing position of the blowing paths and the material moving track is arranged below the observing area of the image collecting system. The image collecting system preferentially selects a CCD camera of area array CCD imaging or linear array CCD imaging. The color selector has large treating amount, simple structure and accurate judgment to the grains with different colors, which can automatically remove the grains with different colors in the material and is mainly used for sorting the grain materials, such as rice, etc.
Owner:CHINA HEFEI TAIHE OPTOELECTRONICS TECH
R-1-(3-methylphenyl)ethanol and synthesis of ester thereof
InactiveCN104262093AOvercoming the problem of low yieldEasy to realize industrial productionOrganic compound preparationOrganic chemistry methodsP-ChlorophenolKinetic resolution
The invention discloses R-1-(3-methylphenyl)ethanol and a synthetic method of an ester thereof. The preparation method of R-1-(3-methylphenyl)ethanol comprises the following steps: taking 1-(3-methylphenyl)ethanol as a raw material, lipase as a biologic resolution catalyst, acidic resin as a racemization catalyst, and p-chlorophenol ester as an acyl donor, conducting dynamic kinetic resolution to obtain R-1-(3-methylphenyl)ethanol ester, and then conducting LiOH hydrolysis to obtain R-1-(3-methylphenyl)ethanol. The R-1-(3-methylphenyl)ethanol and the synthetic method of the ester thereof disclosed by the invention have the advantages of mild conditions, environment friendliness, good product yield, high selectivity and cheap price and good feasibility of the adopted racemization catalyst, so that the technology has a high application value in industrial production.
Owner:王同俊
Method for separating and purifying phytase with simpleness and high efficiency
The invention provides a method for separating and purifying phytase with simpleness and high efficiency. The method comprises the following steps of: centrifugating fermentation liquor producing the phytase by a centrifuge, collecting supernatant, utilizing substrate applied by the phytase, namely phytic acid (or phytate), as affinity chromatography adsorbent, directly adding the phytic acid (or phytate) into the supernatant, stirring fully and evenly, and absorbing phytic acid (or phytate) and the phytase with specificity. Due to strong sequestering power, the phytic acid (or phytate) generally forms insoluble salts with minerals of calcium, magnesium, sodium, zinc, iron, copper, manganese and the like. At the moment, the adding of inorganic salt containing the metal ions can precipitate the combined body of phytic acid and phytase, and the precipitates can be collected by the centrifuge and is dried by a drier so as to obtain the preparation of phytase powder. The method has the advantages of simple and convenient separation and purification, high yield, high purity, low cost and the like.
Owner:广州市开恒生物科技有限公司
Preparation method of isotropic graphite material
The invention discloses a preparation method of an isotropic graphite material. The preparation method specifically comprises the following steps: doping mesocarbon microbeads with different particlesizes with chopped carbon fibers, carrying out liquid-phase oxidation treatment, carrying out compression molding by a secondary cold isostatic pressing method, and carrying out carbonization and graphitization. According to the invention, the problem of low yield caused by product cracking in the existing ink preparation technology taking the mesocarbon microbeads as a raw material is effectivelysolved, the bending strength of the graphite material is also improved, the compactness is improved, and the resistivity and the aperture ratio are reduced, so that the performance of the graphite material is improved.
Owner:山东晨阳新型碳材料研究院有限公司
Method for producing D-ribose by fermenting bacillus subtilis
InactiveCN101338331AOvercoming the problem of low yieldEasy to separate and extractMicroorganism based processesFermentationBiotechnologyTransketolase
The invention relates to a method for producing D-plant nucleic acid by using Bacillus subtilis to ferment which includes the steps: (1) inoculating the production strain of transketolase defect Bacillus subtilis into a seed culture medium to activate to obtain a seed liquid; (2) preparing a fermentation culture medium which takes dextrose as a carbon source and adding organic acid such as citric acid or lactic acid; (3) inoculating the seed liquid into the fermentation culture medium to carry out fermentation. The method of the invention has the beneficial effects of: being capable of remarkably increasing the yield of the D-plant nucleic acid and improving the yield rate; reducing the outgrowths in the fermentation liquid, thus being beneficial to the separation and extraction of the D-plant nucleic acid; being simple and practical to control the fermentation metabolic process and being easily industrialized.
Owner:EAST CHINA UNIV OF SCI & TECH
Wavelength selective radiator coating applied to thermophotovoltaic power generation device and preparation method
The invention discloses a wavelength selective radiator coating applied to a thermophotovoltaic power generation device and a preparation method of the wavelength selective radiator coating. Firstly, erbium oxide powder and aluminum oxide powder are uniformly mixed, then mixed powder is obtained, grinding balls, a ball-milling liquid, the mixed powder and a dispersing agent are added to a ball-milling tank for ball milling, and uniformly dispersed slurry is obtained; the grinding balls in the slurry are filtered out, the ball-milling liquid in the slurry is dried, and dry powder is obtained; the dry powder is put in a high-temperature atmosphere furnace and heated, so that the erbium oxide powder and the aluminum oxide powder in the dry powder are sintered to form composite powder, the grinding balls, a binding agent and a diluent are added to the composite powder, the mixture is subjected to ball milling, the uniformly mixed slurry after ball-milling is dried, and then a die can be used for coating a substrate material; after the coated substrate material is dried and sintered at a high temperature, the wavelength selective radiator coating is formed and obtained. The mechanical performance and the surface strength of the coating are improved, the thermal stability of a coating radiator is improved, and the defect that the coating cannot be bonded to a ceramic substrate easily is overcome.
Owner:NANJING UNIV OF SCI & TECH +1
Catalytic synthesis method of organic chemical intermediate 1,2-diketone compound
ActiveCN103936540AOvercoming the problem of low yieldOvercome the disadvantages of poor catalytic performanceOrganic compound preparationCarbonyl group formation/introductionArylSynthesis methods
The invention relates to a catalytic synthesis method of an organic chemical intermediate 1,2-diketone compound. Asymmetric aryl alkyl acetylene is taken as a raw material, direct catalytic oxidation reaction is achieved in the presence of a multi-component catalyst / assistant system, so as to prepare the 1,2-diketone compound. Effects of types of components of the catalyst and the assistant are researched by a lot of experiments, and a reaction solvent applicable to the system is properly screened. The synthesis process is high in reaction yield, mild in reaction condition and short in reaction time, is an excellent synthesis method of the 1,2-diketone compound, and has broad large-scale industrial application value and market potential.
Owner:河北德瑞化工有限公司
Preparation method of calcium astragalus polysaccharide
InactiveCN104940277AOvercoming the problem of low yieldHigh yieldOrganic active ingredientsNervous disorderAstragalus polysaccharideChloride
The invention discloses a preparation method of calcium astragalus polysaccharide. The preparation method comprises the following steps: (1) extracting radix astragali with ethanol of which the concentration is 5 wt% and the pH is 9; carrying out filtering to obtain a filtrate; concentrating the filtrate till ethanol is removed completely; drying to obtain an astragalus polysaccharide extract; (2) dissolving the astragalus polysaccharide extract obtained in the step (1) with water, adding a calcium chloride solution to adjust the pH to be 9 to 11, and carrying out a reaction for 6 to 48 hours at 60 to 90 DEG C; (3) purifying the reaction liquid obtained in the step (2) to obtain calcium astragalus polysaccharide. The preparation method has the advantage that the yield of calcium astragalus polysaccharide can be improved obviously, thereby being suitable for industrial application.
Owner:LANZHOU INST OF ANIMAL SCI & VETERINARY PHARMA OF CAAS
Method for preparing m-diisopropylbenzene hydrogen peroxide and p-diisopropylbenzene hydrogen peroxide
ActiveCN112679403AOvercoming the problem of low yieldAvoid easy separationOrganic compound preparationPeroxy compound preparationIsopropylFluid phase
The invention relates to the field of organic synthesis, and discloses a method for preparing m-diisopropylbenzene hydrogen peroxide and p-diisopropylbenzene hydrogen peroxide, which comprises the following steps: contacting a material containing m-di (2-hydroxy isopropyl) benzene and p-di (2-hydroxy isopropyl) benzene with hydrogen peroxide to react; obtaining a reaction mixture containing m-diisopropylbenzene hydroperoxide and p-diisopropylbenzene hydroperoxide; and carrying out solid-liquid separation on the reaction mixture to obtain a liquid phase containing m-diisopropylbenzene hydroperoxide and a solid phase containing p-diisopropylbenzene hydroperoxide. The m-diisopropylbenzene hydrogen peroxide prepared by the method provided by the invention has the purity of 95% or more and the yield of 82% or more, the p-diisopropylbenzene hydrogen peroxide has the purity of 97% or more and the yield of 86% or more, and the method has the advantages of less waste acid generation amount, cleanness, environmental protection, mild reaction conditions and easy control of reaction, and is suitable for industrialization.
Owner:CHINA PETROLEUM & CHEM CORP +1
Production method and production facility of waterproof breathable valve
PendingCN111791509AWith automatic detectionOvercoming the problem of low yieldMachine valve testingDomestic articlesProcess engineeringMechanical engineering
The invention discloses a production method and production facility of a waterproof breathable valve, and relates to the production of the waterproof breathable valves. According to the production method of the waterproof breathable valve, a breathable film is embedded into a breathable valve shell through the injection molding technology, the damage to the breathable film is low, and the problemthat the breathable film of the produced waterproof breathable valve falls off due to the environmental influence cannot exist. The production facility of the waterproof breather valve comprises a breathable film automatic stripping and positioning module, a breathable film and breather valve transferring module, a breathable valve cover assembling module and a breathable valve sealing ring assembling module. According to the production method and production facility of the waterproof breathable valve, the problems that the forming period is long due to the fact that the breathable film and abottom film are manually separated and then put into a mold, and the product yield is low due to the fact that the injection molding technology is unstable are solved. Meanwhile, the functions of breathable valve automatic detection, automatic accepted product recognition and screening and automatic assembly are fulfilled.
Owner:SHANGHAI ALLIED PLASTIC IND
Method for preparing artificial quartz
InactiveCN101480810BSimple manufacturing processReduce energy consumptionMixing operation control apparatusCeramic shaping apparatusArtificial stoneAccelerant
The invention discloses a preparation method for artificial stone. The raw materials of the preparation method comprise quartz sand of 10 to 80 meshes, quartz sand of 80 to 200 meshes, quartz sand of 200 meshes, quartz of 325 meshes, unsaturated resin, accelerants, solidified agents and coupling agents. The preparation method comprises the following steps: unsaturated resin and color paste are stirred, the quartz sand is added into the unsaturated resin from small size to big size and is uniformly stirred with the unsaturated resin,, the accelerants, the coupling agents and the solidified agents are added in the mixture of the quartz sand and the unsaturated resin and are stirred uniformly, the mixture is injected into a forming mold and is put in the vacuum environment of 0.097MPa to -0.1MPa for about eight minutes, and then the product is naturally solidified under normal temperature and normal pressure, and is dimensioned, thickened and polished to obtain the finished product.
Owner:上海贵雅橱柜有限公司 +1
Method for synthesizing fatty acid diethanol amide
InactiveCN107382762AOvercoming the problem of low yieldReduce manufacturing costOrganic compound preparationTransportation and packagingDistillationSynthesis methods
The invention discloses a method for synthesizing fatty acid diethanol amide. According to the method, mixed grease consisting of soybean oil, wool fat, rice bran oil and urushi tallow, and diethanol amine are adopted as raw materials, sodium methylate is adopted as a catalyst, and fatty acid diethanol amide is prepared through two steps of synthesis of reduced pressure distillation dehydration and ester aminolysis. The problem that the yield of fatty acid diethanol amide is low when a conventional one-step synthesis method is used is overcome, the yield of the fatty acid diethanol amide can be up to 88% or greater, and the production cost of the fatty acid diethanol amide is reduced as palm oil and coconut oil which are relatively high in price are replaced by the mixed grease consisting of soybean oil, wool fat, rice bran oil and urushi tallow. Compared with a conventional product, the fatty acid diethanol amide is remarkable in thickening property, remarkable in emulsion property, good in compounding property and synergetic effect with other surfactants, furthermore good in property such as electrostatic resistance, rusting resistance and corrosion resistance, and in addition is simple and harmless in process, low in material cost and easy in industrial production.
Owner:钟千里
A kind of synthetic method of ethyl salicylate
ActiveCN110283072BHigh yieldFully contactedOrganic compound preparationCarboxylic acid esters preparationEthyl salicylateHigh concentration
The invention belongs to the field of chemical engineering, and particularly discloses a synthetic method of ethyl salicylate with high purity and conforming to drug use. The method comprises the steps of using sulfuric acid for catalytic synthesis of the ethyl salicylate, washing a product and purifying the product; a mixture of ethanol and water is collected while ethanol with high concentration is added to a reaction system in the synthesis process, forward esterification reaction can be effectively promoted, and the improvement of the reaction yield is facilitated; the obtained ethyl salicylate product is high in purity, no unknown impurities are introduced, the requirements of the drug use are met, the quality is guaranteed from raw materials, and the unknown risk of the product during clinical use is reduced.
Owner:GUANGZHOU XINGQUN PHARMA
A kind of chromatographic purification method of Quina bark alcohol
ActiveCN110183314BGuaranteed elution yieldOvercoming the problem of low yieldEther separation/purificationActivated carbonAlcohol
The invention provides a chromatography purification method for L-quebrachitol. The chromatography purification method comprises the following steps: (1) pretreating glue making wastewater so as to obtain a concentrated primary liquid; (2) cooling and filtering the concentrated primary liquid, and eluting filtrate through a chromatographic column filled with powdered activated carbon; (3) respectively weighing polar resins HPD400, HPD600 and D145 in a mass ratio of (3-2):(3-2), adding an activated carbon effluent, carrying out constant-temperature water bath oscillation at 100-120r / minute at 23-26 DEG C for 3-5 hours, leaving to stand, carrying out vacuum suction filtration, and putting 2-4 times of a methanol and n-propyl alcohol mixed solution into the resins so as to obtain an extract;(4) feeding the extract through a chromatographic column filled with silica gel of 100-300 meshes, eluting with a flow phase of the methanol and n-propyl alcohol mixed solution, and collecting an eluant; (5) carrying out vacuum concentration on the eluant at 80 DEG C or less, cooling the concentrated liquid to separate a crystal, recrystallizing for 2-3 times, thereby obtaining the L-quebrachitol.The chromatography purification method for L-quebrachitol, which is provided by the invention, is high in extraction purity, the extraction rate is greatly increased, and a industrialized chromatography extraction process of L-quebrachitol can be achieved.
Owner:HAINAN ZHONG XIANG TECH CO LTD
Synthesis method of o-tert-butyl aniline
PendingCN114773206AImprove product qualityGood choiceOrganic compound preparationCarboxylic acid amides preparationOrganic solventOrtho position
The invention discloses a synthesis method of o-tert-butyl aniline. The reaction formula is shown in the specification, wherein R1 and R2 are independently selected from CH3 or H; the preparation method comprises the following steps: carrying out a heating reaction on a compound shown in a formula III and alkali in an organic solvent to obtain an o-tert-butyl aniline compound, wherein the molar ratio of the compound shown in the formula III to the alkali is 1: (3.5-7.5). The synthesis method provided by the invention overcomes the problem of low yield of aryloxy amide of which the ortho-position is a tert-butyl electron-donating group in the prior art, the yield reaches 70% or above, and the synthesis method is high in safety, low in cost, good in selectivity, high in yield and suitable for large-scale production.
Owner:安徽皓元药业有限公司
A kind of catalytic synthesis method of pharmaceutical intermediate diaryl compounds
ActiveCN104058909BAchieve splitOvercoming the problem of low yieldOrganic compound preparationOrganic chemistry methodsAcetic acidSynthesis methods
The invention relates to a catalyzed synthesis method for drug intermediate diaryl-class compounds. According to the method, arylhydrazine and arylboronic acid are taken as raw materials, and under the catalysis of Pd(acac)<2> / triphenylphosphine / acetic acid, the diaryl-class compounds are successfully prepared. Due to adding of auxiliaries, catalysis is effectively concerted, and smooth conducting of the reaction is promoted. The optimum solvent type adapting to a catalytic system is studied, and the method has the advantages of being high in yield coefficient, and moderate in reaction, and has the quite wide large-scale application value and market potentials.
Owner:SHANGHAI LINKCHEM TECH CO LTD
R-1-(2,5-dimethylphenyl)ethanol and synthesis of ester thereof
InactiveCN104262091AGuaranteed cheap and easy to getOvercoming the problem of low yieldOrganic compound preparationOrganic chemistry methodsP-ChlorophenolKinetic resolution
The invention discloses R-1-(2,5-dimethylphenyl)ethanol and a synthetic method of an ester thereof. The preparation method of R-1-(2,5-dimethylphenyl)ethanol comprises the following steps: taking 1-(2,5-dimethylphenyl)ethanol as a raw material, lipase as a biologic resolution catalyst, acidic resin as a racemization catalyst, and p-chlorophenol ester as an acyl donor, conducting dynamic kinetic resolution to obtain R-1-(2,5-dimethylphenyl)ethanol ester, and then conducting LiOH hydrolysis to obtain R-1-(2,5-dimethylphenyl)ethanol. The R-1-(2,5-dimethylphenyl)ethanol and the synthetic method of the ester thereof disclosed by the invention have the advantages of mild conditions, environment friendliness, good product yield, high selectivity and cheap price and high feasibility of the adopted racemization catalyst, so that the technology has a high application value in industrial production.
Owner:王同俊
A method for producing large-width and large-area stainless steel composite panels
ActiveCN106975834BIncrease productivityEliminate tailor welding and grinding processWelding/soldering/cutting articlesMetal working apparatusBond interfaceSurface cleaning
The invention discloses a production method for a large-width large-area stainless steel composite plate and belongs to the technical field of bi-metal composite plate rolling. The problems that an existing production method is complicated in process, the product quality is difficult to control, the production efficiency is low, and the investment cost and the production cost are high due to the fact that a special rolling mill is needed are solved. The production method comprises the steps of blank assembling design, blank surface cleaning, explosive blank making, flaw detection, repair welding grinding, edge defect removing, blank heating, descaling, rolling, cooling, straightening and finishing. According to the production method for the large-width large-area stainless steel composite plate, the limitation that the large-width stainless steel composite plate cannot be produced through a direct explosive welding method is overcome; the stainless steel composite plate with the width larger than 1600 mm is produced; the splice welding grinding process before explosive welding is omitted; the blank preparation time of explosive welding is shortened; the follow-up welding workload is reduced; the production efficiency is improved; and the stainless steel composite plate produced through the production method is high in bonding interface strength, safe and high in reliability.
Owner:嘉峪关天源新材料有限责任公司
A kind of preparation method of isotropic graphite material
The invention discloses a preparation method of an isotropic graphite material, specifically: after doping mesophase carbon microspheres with different particle sizes and chopped carbon fibers, undergoing liquid phase oxidation treatment, and then passing through secondary cold isostatic pressing Compression molding process, followed by carbonization and graphitization. The invention effectively overcomes the problem of low yield caused by product cracking in the existing ink preparation technology using mesocarbon microspheres as raw materials, and also improves the bending strength of graphite materials, improves compactness, reduces resistivity and Open porosity, thereby improving the performance of graphite materials.
Owner:SHANDONG CHENYANG NEW CARBON MATERIAL CO LTD
High-stability hot pressure injection forming system
PendingCN107009487AImprove stabilityImprove consistencyAuxillary shaping apparatusSlip casting mouldsSlurryMaterials science
The invention belongs to the field of ceramic material forming and particularly relates to a high-stability hot pressure injection forming system. The high-stability hot pressure injection forming system comprises a constant temperature heater, a heating trough, a mold, slurry and the like. The heating trough is of an interlayer structure. A slurry containing trough is arranged in the heating trough, and the slurry is contained in the slurry containing trough. A heating medium is injected into an interlayer of the heating trough. The constant temperature heater is attached to the periphery of the heating trough. A heating medium liquid level monitoring device is further arranged on one side of the heating trough. The slurry containing trough is sealed through a material storage cover located at the top of the heating trough. The mold is tightly arranged on the upper surface of the material storage cover. One end of a slurry conveying pipe penetrates through the material storage cover to communicate with the mold, and the other end of the slurry conveying pipe extends into the inner bottom end of the heating trough. A through hole lead-in gas path system is further arranged at the upper end of the heating trough. Through the high-stability hot pressure injection forming system, the heating medium liquid level can be monitored at any time, a proper amount of the heating medium is injected as required, and the heating efficiency and process parameter-product performance stability are improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Double concave diamond energy transmission window and preparation process thereof
InactiveCN109712857ALittle or no impact on transmission performanceImprove transmission performanceTransit-tube coupling devicesEngineeringConcave surface
The invention discloses a double concave diamond energy transmission window and a preparation process thereof, which solve the problem that the effective welding area of a window sheet of an energy transmission window in the prior art is smaller and smaller, thus leading to difficulty of metallization of a box type window. The window includes a first rectangular waveguide, a first circular waveguide, a diamond window sheet, a second circular waveguide, and a second rectangular waveguide that are sequentially connected, and a surface of the diamond window sheet orienting to the first circular waveguide or / and the second circular waveguide is disposed as an inwardly-concave cambered surface. The window achieves the effect of effectively increasing the metallized area without substantially changing the size of the box type window.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Flexible perovskite thermal-control film and preparation method thereof
ActiveCN105732005ARapid changes in emissivityIncreased emissivity in high temperature regionsManganates/permanganatesDiaminodiphenyl etherSilanes
The invention discloses a flexible perovskite thermal-control film and a preparation method thereof. The preparation method comprises the following steps: modifying manganese, strontium, neodymium and precursor powders with 3-aminopropyltriethoxy silane to obtain perovskite powder, adding 4,4'-diaminodiphenyl ether and the perovskite powder into dimethylacetamide at -10 to 0 DEG C, adding pyromellitic dianhydride while performing ultrasonic stirring, quickly stirring, and vacuumizing to obtain a sol; and transferring the obtained sol onto a substrate material, and carrying out gradient heating setting to obtain the set film. By using the 4,4'-diaminodiphenyl ether and pyromellitic dianhydride as the base materials, the high-temperature region emissivity of the perovskite-base flexible film is enhanced by 8%, thereby solving the problem of implementation defects in the manganese oxide ceramic sheet and the problem of low yield caused by the brittleness of the ceramic sheet. The method has the advantages of simple manufacturing technique, controllable film thickness and no restriction to specimen specifications, and can easily implement large-scale production and large-area application.
Owner:NANJING UNIV OF SCI & TECH
Method for separating and purifying sea-mussel mucin by using mixing adsorption chromatography
ActiveCN101348520BOvercoming the problem of low yieldHigh yieldPeptide preparation methodsAnimals/human peptidesHigh concentrationChromatographic separation
Owner:JIANGYIN USUN BIOCHEMICAL TECH CO LTD
Clean synthesis method of iron oxide red pigment with low oil absorption
ActiveCN113387393AIncrease volumetric yieldOvercoming the problem of low yieldChemical industryFerric oxidesPhysical chemistryPhotopigment
The invention provides a clean synthesis method of an iron oxide red pigment with low oil absorption. The method comprises the following steps: 1, preparation: adding 30-50 parts of FeSO4.7H2O into an auxiliary agent, and dissolving to prepare a solution A; 2, primary crystallization: mixing the solution A obtained in the step 1 with a NaOH solution B, and then precipitating and uniformly oxidizing to prepare gamma-FeOOH primary seed crystal; 3, secondary crystallization: adding the gamma-FeOOH primary seed crystal suspension prepared in the step 2 into the solution A in the step 1, stirring and oxidizing, and adding a NaOH solution B to prepare gamma-FeOOH secondary seed crystal; 4, tertiary crystallization: adding the gamma-FeOOH secondary seed crystal obtained in the step 3 into the solution A obtained in the step 1, adding a NaOH solution B at the same time, and stirring and oxidizing to obtain gamma-FeOOH tertiary seed crystal; and 5, preparation of a finished product of iron oxide red: preparing a FeSO4.7H2O solution, heating the gamma-FeOOH tertiary seed crystal suspension obtained in the step 4, then adding the FeSO4.7H2O solution, heating, and carrying out suction filtration, washing, drying and grinding to obtain the finished product of iron oxide red.
Owner:SHENGHUA GROUP DEQING HUAYUAN PIGMENT +1
Method for preparing nano hydroxyapatite powder
InactiveCN101734635BNo pollution in the processNo harmNanostructure manufacturePhosphorus compoundsWater bathsPolyethylene glycol
The invention relates to a method for preparing nano hydroxyapatite powder, belonging to the field of the biomedical material. The method for preparing the nano hydroxyapatite powder comprises the following steps: adding the organic polymer of polyethylene glycol to the initial reactants of calcium nitrate and diammonium phosphate solution to adjust and control the morphologies of the products ofreaction; adding aqueous ammonia to adjust the pH values of the products of reaction, and making the aqueous ammonia react with the products of reaction at different water bath temperature to synthesize nano hydroxyapatite precipitate, wherein the agglomeration of the synthesized nano hydroxyapatite precipitate can be inhibited by the polyethylene glycol functioning as the dispersant; freezing and drying synthesized nano hydroxyapatite precipitate slurry to obtain dry nano hydroxyapatite powder which contains by-products of reaction and polyethylene glycol, and calcinating the dry nano hydroxyapatite powder at high temperature to remove the by-products of reaction and the polyethylene glycol which are contained in the dry nano hydroxyapatite powder to obtain the nano hydroxyapatite powderwhich is in the shape of the ball or the rod and in the particle size of 10-100 nm and has high yield and good dispersion. The method for preparing the nano hydroxyapatite powder is simple, needs short preparing period, causes no poison and pollution and is suitable for industrial production.
Owner:SICHUAN UNIV
Macrobrachium rosenbergii thymosin β4 gene, protein, preparation method and application thereof
ActiveCN111499720BHigh antibacterial activityValidation of antimicrobial activityAntibacterial agentsThymosin peptidesNucleotideGenes proteins
Owner:YANGZHOU UNIV
A kind of green tea cultivation method
ActiveCN111557200BNutrient penetrationPenetrate fastBio-organic fraction processingAnimal corpse fertilisersGreen teasPest control
The invention discloses a method for cultivating green tea, comprising the following steps: selecting a yellow soil area with convenient irrigation and flat terrain as an organic green tea planting site, plowing the planting site and treating it step by step, and opening a planting ditch with equal depth and width; Apply the planting base fertilizer to the planting ditch in late September; transplant the green tea saplings in late October, transplant the green tea saplings together with the soil around the roots into the planting ditch after applying the planting base fertilizer, then apply soil amendments, and water regularly. Roots, followed by stamping until the soil is compacted after covering the soil completely, and fully watering; the tea seedlings are regularly trimmed, and the trunk height is kept at 40-45cm; fertilization ditch is excavated on both sides of the planting ditch, and planting base fertilizer is applied to the fertilization ditch Excavating a soil improvement ditch along the vertical direction of the planting ditch, applying a soil conditioner to the soil improvement ditch; picking mature tea trees in spring, and daily strengthening the prevention and control of diseases and insect pests.
Owner:TEA RES INST ANHUI ACAD OF AGRI SCI
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com