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44results about How to "Strong purity" patented technology
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Preparation method of human IgG immunomagnetic bead for staphylococcus aureus enrichment
InactiveCN102426229AImprove stabilityImprove separation efficiencyPreparing sample for investigationMagnetic beadCoupling
The invention relates to a preparation method of a human IgG immunomagnetic bead (IMB) for staphylococcus aureus enrichment. With a magnetic bead as a carrier and human IgG as a recognition intermediate, the human IgG immunomagnetic bead is prepared through the processes of activation, coupling, washing and blocking. The human IgG immunomagnetic bead incubated in an appropriate buffer solution and under certain conditions can be used for high efficiency capture and enrichment of staphylococcus aureuses in a detection sample. The method of the invention has the advantages of strong specificity, high efficiency and rapidity, simple operation, low cost, and has no need for large equipment as well as specially trained professional operation personnel. Also, the sample needs no special pretreatment. Therefore, the method provided in the invention can be widely used for enrichment separation and detection of staphylococcus aureuses in food, feed, cosmetics, environment and clinics.
Owner:GUANGDONG OCEAN UNIVERSITY
Preparation method of antioxidant in blueberry leaves
The invention belongs to a preparation technology of natural antioxidant, particularly relates to a preparation method of antioxidant in blueberry leaves. The preparation method of the antioxidant in the blueberry leaves includes the steps as follows: (1) collecting fresh blueberry leaves, washing the fresh blueberry leaves with water, draining away water, shearing the leaves into segments with different length, adding 8-14 times water, adjusting pH to 3-8, conducting extraction in hot-water bath at the temperature of 90-100 DEG C, filtering the extract, and decompressing and concentrating the extract to 15-25 times of original concentration at the temperature of 50-60 DEG C; and (2) conducting adsorption with macroporous resin, eluting with water and 10%-30% alcohol, detecting by ultraviolet spectrophotometry, collecting adsorbed eluent with strong antioxidant activity at 280nm part, decompressing and concentrating the collected eluent to paste, and conducting vacuum-drying at the temperature 50-60 DEG C, thus obtaining light brown powder. The preparation method is simple in technology, friendly to environment and good in purity; and the product is safe and has strong antioxidantactivity.
Owner:海宁市袁花镇工业投资有限公司
High-strength hardened and tempered steel plate for ocean engineering and production method thereof
The invention discloses a high-strength hardened and tempered steel plate for ocean engineering and a production method thereof. The steel plate comprises the components of 0.10%-0.15% of C, 0.15%-0.40% of Si, 1.10%-1.35% of Mn, 0-0.010% of P, 0-0.005% of S, 0.15%-0.45% of Cr, 0.10%-0.30% of Ni, 0.015%-0.028% of Nb, 0.015%-0.042% of V, 0.025%-0.045 % of Al, and the balance Fe and inevitable impurities. The production method comprises the procedures of converter steelmaking, LF refining, VD vacuum treatment, continuous casting, casting blank heating, rolling and hardened-tempered heat treatment. The steel plate is 20-50 mm in thickness, larger than or equal to 480 MPa in yield strength, 620-780 MPa in tensile strength, larger than or equal to 20% in elongation and larger than or equal to 100 J in -40 DEG C longitudinal impact work and has good comprehensive performance.
Owner:WUYANG IRON & STEEL
Method for preparing copper powder with silver-plated surface
The invention discloses a method for preparing copper powder with a silver-plated surface and belongs to the field of processes of plating silver on the surface of copper powder. The method for preparing the copper powder with the silver-plated surface is characterized by comprising the following steps: reducing Cu<2+> to Cu atoms by redox reaction between a soluble copper salt and a reducing agent in a liquid phase to prepare needed copper powder; adding an AgNO3 solution into ethylenediamine tetraacetic acid, stirring, adding the copper powder, and performing replacement reaction between Cu and Ag<+> to obtain Ag which is precipitated on the surface of the copper powder; and washing with distilled water, and then baking to obtain the copper powder with the silver-plated surface. The silver plating treatment on the surface of the copper powder can be finished by improving an existing copper powder preparing process, and the copper powder with the silver-plated surface is prepared; and under a condition that excellent characters of the copper powder are kept, the oxidation resistance of the copper powder is effectively improved, and the application range of the copper powder is enlarged. The method for preparing the copper powder with the silver-plated surface is simple in preparation process, easy to operate and suitable for popularization and application.
Owner:陈键
Method for preparing high-purity silica packing through sol-gel process
The invention discloses a method for preparing high-purity silica packing through a sol-gel process. The method is characterized in that monocrystalline silicon powder is taken as a silicon source, and under the catalysis of ammonia water, high-purity and monodispersed nanosilica hydrosol is firstly synthetized; and monodispersed microspheres are prepared through the sol-gel process, and the microspheres are subjected to thermal treatment, so that high-purity polyporous micron-size silica-based microspheres with the grain sizes of 2 to 10 um are finally obtained. According to the invention, the monocrystalline silicon powder is taken as the silicon source, and the ammonia water is taken as catalyst, so that such impurities as metal are prevented from mixing in, after the monodispersed microspheres are subjected to thermal treatment, the high-purity polyporous micron-size silica-based microspheres are obtained, have good monodispersity and uniformly-distributed surface pore structures, and can be used as silica packing directly without being processed in a grading manner.
Owner:BEIJING UNIV OF CHEM TECH
Method for separation and extraction of epothilone B from sorangium cellulosum fermentation liquid
ActiveCN103667387APromote growthIncrease productionOrganic chemistryMicroorganism based processesDesorptionEthyl acetate
The invention provides a method for separation and extraction of epothilone B from a sorangium cellulosum fermentation liquid, and belongs to the microbial fermentation pharmacy field. The method comprises the steps: after shake-flask cultivation of sorangium cellulosum strains, amplifying step by step, fermenting sorangium cellulosum, followed by carrying out macroporous resin adsorption, ethyl acetate desorption and methanol redissolution, and thus obtaining a crude product; carrying out column chromatography and HPLC analysis of the crude product to obtain a preliminary component of epothilone B, then adding a molecularly imprinted polymer for specific adsorption of epothilone B, and finally carrying out methanol elution and crystallization to obtain epothilone B. Sorangium cellulosum is produced by step-by-step fermentation, and at the same time, the molecularly imprinted polymer with the specific targeted adsorption capacity is adopted in the separation and extraction process, not only has a strong adsorption capacity on epothilone B, but also can easily extract epothilone B, so as to reduce the extraction cost of separation and extraction of epothilone drugs, and have more wide industrialized application prospects and economic benefits.
Owner:SHAANXI UNIV OF SCI & TECH
High strength welding rod for oceaneering and manufacturing method and welding method thereof
InactiveCN103737203AImprove toughnessImprove purityArc welding apparatusWelding/cutting media/materialsCooking & bakingTemperature control
The invention relates to welding rods for oceaneering, in particular to a high strength welding rod for oceaneering and a manufacturing method and a welding method thereof. The welding rod and the methods are also suitable for the field of manufacturing of high-strength seawater corrosion resistant devices such as oceaneering ships, ocean oil pipelines and nuclear power devices. The manufacturing method includes the following steps of powder sintering preprocessing, binder disposition, power blending accuracy and stirring evenness control, welding rod manufacturing and welding rod baking time and temperature control. The welding rod is high in seawater corrosion resistance, ultralow in hydrogen, high in strength, toughness and purity and applicable to the oceaneering.
Owner:HANGZHOU YONGXIANG WELDING CONSUMABLES
Preparation method of ternary copper-based sulfide semiconductor semiconductor nanomaterial
The invention discloses a preparation method of a ternary copper-based sulfide semiconductor semiconductor nanomaterial. The preparation method of the ternary copper-based sulfide semiconductor semiconductor nanomaterial comprises following steps: solvothermal method is adopted to prepare a nanometer scale ternary copper antimony sulfides of different stoichiometric ratios, an inorganic copper salt, an inorganic antimony salt, and a sulfur source are taken as raw material, middle temperature pressurization one-step reaction is adopted to prepare the ternary sulfide powder. The operation is simple; few steps are needed; the raw materials are cheap and easily available; the applicability on selection of different raw materials is high; in the preparation process, the product is easily prepared; product particle size is small; crystal grain growth is avoided; in the reaction process, preparation failure caused by explosive is avoided; the preparation method is beneficial for industrial large scale production; yield is as high as 86.2%; product phase purity is high; impurities are few; purity can be as high as 97.8%; the universality is high; technology is stable; production stabilityis high; a defect in the prior art that long time high temperature treatment is needed is avoided; and the prepared nanometer ternary sulfur antimony copper material can be widely used in the energy fields of lithium battery, thermoelectricity, and photoelectricity.
Owner:CHONGQING UNIV OF ARTS & SCI
Metal boride coating and preparation method thereof
ActiveCN112359395AHigh activityStrong purityElectrophoretic coatingsMicron scaleUltrasonic dispersion
The invention discloses a metal boride coating and a preparation method thereof. The preparation method comprises the steps that solid inorganic salt is mixed and ball-milled to be micron-sized, metalboride nanoparticles are added into the ball-milled mixed salt, then acetone liquid is added, ultrasonic dispersion is conducted, and solid mixed salt containing the metal boride nanoparticles is obtained after vacuumizing and heating in a vacuum drying box; solid inorganic salt is put into a crucible, and is heated to be fused in a resistance furnace under the protection of inert gas, the solidmixed salt is added into the fused inorganic salt to form nanometer inorganic fused salt, after stabilizing, a graphite anode and a cathode to be deposited are inserted into the crucible, and the metal boride coating can be obtained after electrophoretic deposition. According to the method, the high-temperature environment of the inorganic fused salt is utilized, the two procedures of electrophoretic deposition and sintering of the metal boride nanoparticles in the inorganic fused salt are carried out at the same time, namely electrophoretic deposition and sintering are carried out at the sametime, and therefore the compact metal boride coating with high binding force is obtained.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Blue organic electroluminous material and its preparation method and application
InactiveCN1513940ASimple processHigh yieldLuminescent compositionsOrganic electroluminescenceSolvent
An organic electroluminescent material emitting blue light for the organic electroluminescent device is prepared through preparing the solution of 8-hydroxy quinoline in alcohol or acetone, adding triethyleneamine and aqueous solution of lithium sulfate, heaitng while stirring for reaction, filtering, washing and baking. Its advantages are high output rate and purity, high luminescent efficient and color purity, and high thermal stability.
Owner:TAIYUAN UNIV OF TECH
A kind of preparation method of metal boride coating
The invention discloses a method for preparing a metal boride coating, which comprises the steps of: mixing solid inorganic salts, ball milling to micron level, adding metal boride nanoparticles to the ball-milled mixed salt, adding acetone liquid and ultrasonically dispersing it. , after vacuuming and heating in a vacuum drying box, a solid mixed salt containing metal boride nanoparticles is obtained; the solid inorganic salt is put into a crucible, heated to melting in a resistance furnace protected by an inert gas, and the solid mixed salt is added to melt In the inorganic salt, nano-inorganic molten salt is formed. After stabilization, the graphite anode and the cathode to be deposited are inserted into the crucible, and after electrophoretic deposition, the metal boride coating can be obtained; the invention utilizes the high temperature environment of the inorganic molten salt to realize the inorganic molten salt. Electrophoretic deposition and sintering of metal boride nanoparticles in salt are carried out simultaneously, that is, "sintering while electrophoretic deposition", so as to obtain a dense and strong metal boride coating.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Preparation method of flexible nanometer interface composite textile material
ActiveCN104999763AStrong purityHigh purityLamination ancillary operationsVacuum evaporation coatingSputteringNanometre
The invention discloses a preparation method of a flexible nanometer interface composite textile material. A magnetron sputtering method is utilized to establish a layer of flexible nanometer material on the surface of a fiber reinforcement body so as to improve the flexibility of a fiber reinforcement body material and the surface bonding strength between the fiber reinforcement body material and a basic material. Compared with the prior art, a film obtained through magnetron sputtering is good in compactness and high in purity, the bonding performance of the basic material and the film is good, and the basic material is not damaged. A corresponding function can be added for the composite material while the effect of a flexible interlayer layer is played.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Recovery method of waste lithium iron phosphate battery positive electrode material
InactiveCN111924815AStrong purityAchieve recyclingWaste accumulators reclaimingPhosphorus compoundsLithium iron phosphateIron phosphate
The invention provides a recovery method of a waste lithium iron phosphate battery positive electrode material. The recovery method comprises: (1) removing a binder from a positive electrode sheet obtained by disassembling a waste lithium iron phosphate battery, separating out a current collector to obtain a waste positive electrode material, dissolving the waste positive electrode material with nitric acid, and filtering to obtain a first filtrate; and (2) heating the first filtrate at 50-90 DEG C for 1-4 hours to completely oxidize ferrous ions in the first filtrate, adding ammonia water toadjust the pH value of the system to 1-2, continuously heating at 60-90 DEG C for 1-4 hours, filtering to obtain a first filter residue and a lithium-containing filtrate; and washing the first filterresidue for multiple times by adopting a shearing emulsification pump to obtain high-purity iron phosphate. According to the method, when the first filtrate is directly heated, ferrous ions can be completely oxidized, an oxidizing agent does not need to be added, and then the ferrous ions are converted into high-purity iron phosphate. The method is simple to operate, low in cost and environment-friendly.
Owner:曲靖市华祥科技有限公司
Sulfo sodium antimonite nano material preparation method
ActiveCN109437298AStrong purityInfluence of purity, strong feasibilityAntimonates/antimonitesWater bathsArgon atmosphere
The invention discloses a NaSbS2 nano material preparation method and belongs to the technical field of nano material preparation. Na3SbS4.9H2O prepared by a water bath method is utilized as a precursor material; water is utilized as a solvent, so that safety hazards caused by heat evaporation of an organic solvent and effects on the sample purity are avoided, and feasibility is strong; a reactionprocess is performed in a container with an opening, an expensive high-pressure reaction kettle has no need to be used, and limit of the reaction container volume is avoided; the technological conditions have the advantages of moderate conditions, environmental friendliness, simpleness and low cost; a NaSbS2 nanoparticle material can be prepared under a low temperature through heat treatment in the argon atmosphere; the NaSbS2 nanoparticle material has the advantages of good crystallinity, high purity, even dispersion and even morphology. According to the NaSbS2 nano material preparation method disclosed by the invention, the reaction raw materials are easy to obtain, the cost is low, processing equipment is simple, and energy consumption is low; furthermore, the precursor is prepared under the normal pressure, so that safety is good, and feasibility is strong; thus, the NaSbS2 nano material preparation method has the advantages of economic property, practicability and very good industrialization prospect.
Owner:CENT SOUTH UNIV
Health-care food capable of improving sleep and preparation method of health-care food
The invention discloses a health-care food capable of improving sleep and a preparation method of the health-care food, and belongs to the field of health-care foods. The health-care food capable of improving sleep comprises the following raw material components in parts by mass: 40-50 parts of fiveleaf gynostemma herbs, 35-45 parts of plantain herbs, 25-35 parts of poria cocos and 15-20 parts ofradix astragali. The preparation method of the health-care food capable of improving sleep comprises the steps of firstly, cleaning the raw material components, and then performing superfine crushingon the radix astragali so as to obtain radix astragali superfine powder, adding water to the fiveleaf gynostemma herbs, the poria cocos and the plantain herbs, performing decoction, performing filtering, performing decompressing concentration, after decompressing drying, performing crushing, and performing screening so as to obtain dry cream powder; and finally, uniformly mixing the prepared radixastragali superfine powder with the dry cream powder, making a soft material with ethanol of which the mass concentration is 85%, performing granulation, shaping granules, performing polishing, performing packing and performing inspecting. The health-care food capable of improving sleep not only obviously improves the sleep effect, but also is mild in drug property, is free from toxin and side effects, and is suitable for being taken for a long term, and drug tolerance is not liable to cause.
Owner:房洪全
Method for producing high purity nanometer grain dietary fiber
Owner:NANCHANG UNIV
Vibrio marinopraesens as well as separation method and application thereof
InactiveCN109161504AExpand production capacityHigh purityBacteriaMicroorganism based processesVibrio astriarenaeBacterial strain
The invention discloses vibrio marinopraesens and a separation method thereof. Vibrio marinopraesens HN897 generating agarase is separated and obtained from seawater samples of coastal areas in SouthChina, and is preserved in China General Microbiological Culture Collection Center on August 8, 2018 with the preservation number of CGMCC NO.16232. Through species identification, the vibrio marinopraesens HN897 is shown as Vibrio astriarenae. The bacterial strain cultured on a solid agar plate shows that the bacterial strain has the capacity for degrading agar, and the activity of agarase secreted from 2 culturing liquid (TSB and LB) shows that the bacterial strain has high-yield capacity of agarase. Therefore, the vibrio marinopraesens HN897 has wide application and market prospects in thebiopharmaceutical fields of agaro-oligosaccharides and the like, and besides, establishes a basis for subsequent preparation of enzyme products being high in vitality and high in purity.
Owner:HOHAI UNIV
Biodiesel preparation system suitable for kitchen oil
PendingCN111471531AImprove production efficiencyAvoid intermittently adjusting settingsFatty acid esterificationBiofuelsTrans esterificationPtru catalyst
The invention discloses a biodiesel preparation system suitable for kitchen oil. The system comprises a crude oil tank for receiving crude oil subjected to water removal and impurity removal by a pretreatment system, an esterification kettle connected to a discharge port of the crude oil tank, an ester exchange reaction kettle connected to a discharge port of the esterification kettle, and a rectification cutting tower connected to a discharge port of the ester exchange reaction kettle, wherein a settling tank group and a first layering tank are also arranged between the esterification kettleand the ester exchange reaction kettle so as to separate an acidic ionic liquid catalyst from esters; a discharge port at the lower part of the first layering tank is connected with an ionic liquid recovery tank, a discharge port at the upper part of the first layering tank is connected with a feed port of the ester exchange reaction kettle; a crude methyl ester settling tank, a second layering tank and a deodorization tower are further connected between the ester exchange reaction kettle and the rectification cutting tower, and a discharge port of the deodorization tower is connected to a feed port of the rectification cutting tower. Acid sludge cannot be generated, the subsequent treatment difficulty is greatly reduced, and the recyclable rate of the catalyst is high.
Owner:CHONGQING ENVIRONMENT & SANITATION GRP CO LTD
Preparation method of pear dietary fiber
PendingCN113068842ALarge specific surface areaEasy extractionMilk preparationDough treatmentBiotechnologyFood supplement
The invention discloses a preparation method of pear dietary fiber. According to the preparation method, the problems of low utilization rate of pear residue raw materials, high processing cost, low product yield and the like are solved, a three-phase preparation separation technology is utilized to simultaneously decolor and deproteinize, the method is high in efficiency and short-time, the prepared pear residue dietary fiber has the advantages of small particle size, good color, strong water holding capacity and swelling capacity and good activity, the obtained soluble dietary fiber can be used as a food additive of beverages, biscuits, bread, noodles, pastries, ice cream, instant coffee, chocolate or milk tablets, or can be prepared into tablets, capsules or granules, the obtained insoluble dietary fiber can be used for making dietary fiber biscuits, bread, noodles or pastries, or can be prepared into tablets, capsules or granules, and the obtained soluble dietary fiber can be mixed with the insoluble dietary fiber to prepare tablets, capsules or granules.
Owner:HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for Hydrolyzing and Recycling Monomers of Aromatic Polyester Composite Materials
InactiveCN103664513BStrong purityStrong practical valueOxygen-containing compound preparationOrganic compound preparationBenzoic acidGlass fiber
The invention discloses a method for hydrolyzing an aromatic polyester composite material and recovering a monomer. The method comprises the following steps: mixing the aromatic polyester composite material with a caustic soda solution and a polar solvent and reacting, so as to obtain decomposition fluid of an aromatic polyester, and then separating out biphenol, terephthalic acid and p-hydroxybenzoic acid from the decomposition liquid. The invention provides a new approach for recycling a glass fiber reinforced-liquid crystal polymer (LCP), so that the effect on the environment caused by a waste glass fiber reinforced-LCP is solved, turning waste into treasure is achieved, and monomers with important economic value, such as biphenol are recovered. The method is mild in reaction condition, free of high temperature and high pressure, simple in equipment and easy to operate, the decomposition rate of the polyester can be up to over 97%, the total yield of a monomer crude product is greater than 71%, and the separated biphenol with high purity has strong practical value.
Owner:SHANGHAI HUAMING HI TECH GRP +1
Method for preparing high-wear-resistance hard alloy in powder metallurgy process
InactiveCN111020388AHigh hardnessHigh puritySolid state diffusion coatingAl powderThermal dilatation
The invention discloses a method for preparing a high-wear-resistance hard alloy in a powder metallurgy process. The method comprises the steps of raw material selection, drying, smashing, ball milling for mixing, cold press formation, high-temperature sintering, carburizing treatment and the like. According to the method for preparing the high-wear-resistance hard alloy in the powder metallurgy process, the preparation method is simple and scientific, by optimizing the process steps and the technical parameters, silicon carbide, hafnium carbide, manganese zinc ferrite and other raw materialsare added on the basis of iron powder and aluminum powder, the hard alloy prepared by using the method is resistant to high temperature, high in strength, resistant to wear, high in hardness, high indensity, high in anti-corrosion capacity, low in coefficient of thermal expansion, high in purity and high in compactness and uniformity, the bearing capacity of the hard alloy is improved, the service life of the hard alloy is prolonged, and the method is high in practicability and popularization value.
Owner:柳州新开超华科技有限公司
A kind of polypeptide targeting pd-l1 and its application
ActiveCN112028968BStrong specificityHigh purityDispersion deliveryPeptide/protein ingredientsEfficacyMolecular Targeted Therapies
The invention relates to the technical fields of molecular biology and medicine, in particular to a polypeptide targeting PD-L1 and its application. The present invention provides a polypeptide targeting PD-L1, its general formula is NX 5 x 4 x 3 EX 2 x 1 g. The polypeptide of the present invention has high affinity and specificity to PD-L1, can specifically and efficiently target PD-L1 positive tumor cells, and can be used as a polypeptide molecular probe to detect the expression of PD-L1 in tumor cells, and to Real-time monitoring of the efficacy of immunotherapy and screening of patients suitable for immunotherapy; it can also be used as a targeting polypeptide for targeted therapy and imaging of tumors with high expression of PD‑L1, and has broad application prospects.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Process for preparing super-strong anti-hard-water sodium (potassium) humate
InactiveCN1594338BStrong resistance to hard waterRaw materials are easy to getOrganic chemistryBrown coalPotassium
The invent relates to a process for preparing super-strong anti-hard-water sodium (potassium) humate by using brown coal or decomposed coal as principal raw material, H2SO4 as acidating agent, H2O2 as oxidizing agent, and a two step synthesis is employed which consists of, subjecting the raw material containing rich humic acid (brown coal or decomposed coal) to acid-treatment under acidic conditions, then charging oxidation agent (hydrogen peroxide) under alkality condition, thus improving the product capability for resisting hard water.
Owner:HARBIN ENG UNIV
Production process based on automatic machining of automobile parts
ActiveCN110625339AExtended service lifeStrong air tightness pass rateDetection of fluid at leakage pointMaintainance and safety accessoriesMolten stateMolten steel
Owner:CHONGQING BEIDI SIDING MASCH CO LTD
A kind of preparation method of sodium thioantimonite nanometer material
The invention discloses a NaSbS2 nano material preparation method and belongs to the technical field of nano material preparation. Na3SbS4.9H2O prepared by a water bath method is utilized as a precursor material; water is utilized as a solvent, so that safety hazards caused by heat evaporation of an organic solvent and effects on the sample purity are avoided, and feasibility is strong; a reactionprocess is performed in a container with an opening, an expensive high-pressure reaction kettle has no need to be used, and limit of the reaction container volume is avoided; the technological conditions have the advantages of moderate conditions, environmental friendliness, simpleness and low cost; a NaSbS2 nanoparticle material can be prepared under a low temperature through heat treatment in the argon atmosphere; the NaSbS2 nanoparticle material has the advantages of good crystallinity, high purity, even dispersion and even morphology. According to the NaSbS2 nano material preparation method disclosed by the invention, the reaction raw materials are easy to obtain, the cost is low, processing equipment is simple, and energy consumption is low; furthermore, the precursor is prepared under the normal pressure, so that safety is good, and feasibility is strong; thus, the NaSbS2 nano material preparation method has the advantages of economic property, practicability and very good industrialization prospect.
Owner:CENT SOUTH UNIV
Method for extracting and isolating gallinylic acid from Qiongdao dyed wood tree
InactiveCN105348338BReduce property impactStable in natureSugar derivativesSugar derivatives preparationPaederosidic acidMaterial resources
The invention discloses a method for extracting and separating paederosidic acid from Saprosma merrillii Lo. The method comprises the following concrete steps: (1) extracting the stem of Saprosma merrillii Lo by using an aqueous ethanol solution and concentrating liquid extract so as to obtain ethanol extract; (2) dispersing the ethanol extract in water, successively extracting the dispersed ethanol extract with petroleum ether and ethyl acetate of a same volume, dispersing a residual water phase part left after extraction in water, carrying out macroporous resin chromatography, then carrying out gradient elution with the aqueous ethanol solution, carrying out silica gel column chromatography on a target fraction and then carrying out gradient elution with chloroform-methanol so as to obtain a crude paederosidic acid product with a purity of no less than 50%; and (3) dissolving the crude paederosidic acid product with methanol and then carrying out gradient elution with chloroform-methanol so as to obtain a fine paederosidic acid product with a purity of no less than 90%. The method provided by the invention pioneers extraction of the active ingredient paederosidic acid from Saprosma merrillii Lo and has active significance to comprehensive utilization of the medicinal material resource of Saprosma merrillii Lo.
Owner:HAINAN NORMAL UNIV
Rapid heating device for metallurgy casting
ActiveCN107843114AStrong purityHeating evenlyFurnace typesElectric heating for furnacesHeating effectEngineering
The invention discloses a rapid heating device for metallurgy casting. The rapid heating device comprises a working box, a feeding hopper is inserted into the left side of the top of the working box,and a first rotating shaft is movably connected to the center of the bottom of the inner wall of the working box; and a first gear is fixedly connected to the surface of the first rotating shaft, a first motor is fixedly connected to the right side of the bottom of the working box, and an output end of the top of the first motor is fixedly connected with a second rotating shaft. According to the rapid heating device, the first rotating shaft, the first gear, the first motor, the second rotating shaft, a disc and a round bead are arranged so that a switch can control the first motor to work, the second rotating shaft can rotate, the disc can rotate, the round bead can rotate, the first gear can be driven to rotate when the round bead rotates, then the first rotating shaft can rotate and a built-in metal box can rotate slowly so that uniform heating can be facilitated, the heating effect can be better, the heating rate can be increased, and the purity of extracted metal can be higher.
Owner:CHIZHOU ETERNAL MACHINERY MFG
A kind of method for separating and extracting epothilone b from fermented broth of Cystobacter celluli
ActiveCN103667387BPromote growthIncrease productionOrganic chemistryMicroorganism based processesDesorptionEthyl acetate
The invention provides a method for separation and extraction of epothilone B from a sorangium cellulosum fermentation liquid, and belongs to the microbial fermentation pharmacy field. The method comprises the steps: after shake-flask cultivation of sorangium cellulosum strains, amplifying step by step, fermenting sorangium cellulosum, followed by carrying out macroporous resin adsorption, ethyl acetate desorption and methanol redissolution, and thus obtaining a crude product; carrying out column chromatography and HPLC analysis of the crude product to obtain a preliminary component of epothilone B, then adding a molecularly imprinted polymer for specific adsorption of epothilone B, and finally carrying out methanol elution and crystallization to obtain epothilone B. Sorangium cellulosum is produced by step-by-step fermentation, and at the same time, the molecularly imprinted polymer with the specific targeted adsorption capacity is adopted in the separation and extraction process, not only has a strong adsorption capacity on epothilone B, but also can easily extract epothilone B, so as to reduce the extraction cost of separation and extraction of epothilone drugs, and have more wide industrialized application prospects and economic benefits.
Owner:SHAANXI UNIV OF SCI & TECH
Blue organic electroluminous material and its preparation method and application
An organic electroluminescent material emitting blue light for the organic electroluminescent device is prepared through preparing the solution of 8-hydroxy quinoline in alcohol or acetone, adding triethyleneamine and aqueous solution of lithium sulfate, heaitng while stirring for reaction, filtering, washing and baking. Its advantages are high output rate and purity, high luminescent efficient and color purity, and high thermal stability.
Owner:TAIYUAN UNIV OF TECH
Method for preparing high-purity silica packing through sol-gel process
The invention discloses a method for preparing high-purity silica packing through a sol-gel process. The method is characterized in that monocrystalline silicon powder is taken as a silicon source, and under the catalysis of ammonia water, high-purity and monodispersed nanosilica hydrosol is firstly synthetized; and monodispersed microspheres are prepared through the sol-gel process, and the microspheres are subjected to thermal treatment, so that high-purity polyporous micron-size silica-based microspheres with the grain sizes of 2 to 10 um are finally obtained. According to the invention, the monocrystalline silicon powder is taken as the silicon source, and the ammonia water is taken as catalyst, so that such impurities as metal are prevented from mixing in, after the monodispersed microspheres are subjected to thermal treatment, the high-purity polyporous micron-size silica-based microspheres are obtained, have good monodispersity and uniformly-distributed surface pore structures, and can be used as silica packing directly without being processed in a grading manner.
Owner:BEIJING UNIV OF CHEM TECH
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