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51results about How to "Uniform crystal particles" patented technology
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Method for preparing clindamycin phosphate powder injection raw medicine
ActiveCN101439022AChange the dosage ratioChange centrifugationAntibacterial agentsPowder deliverySolubilityClindamycin Phosphate
The invention discloses a preparation method for a clindamycin phosphate powder injection raw medicine which comprises the steps: (a) purification is carried out on a crude product of clindamycin phosphate; (b) crystallization and crystal growth are carried out on filter liquor after the filter liquor is arranged in a crystallization tank; (c) centrifugal separation and washing are carred on crystallization liquor; (d) fast temperature raising and drying are carried out on a clindamycin phosphate wet finished product. The preparation method for the clindamycin phosphate powder injection raw medicine has the advantages of favorable water solubility, uniform crystal form particles, small specific volume, big bulk density, low solvent residue, and the like. The method also simplifies the process operation, and dramatically enhances the product yield.
Owner:华北制药华胜有限公司
Method for ultrasonically crystallizing rebaudiosideA
InactiveCN101812096AHigh purityShort crystallization timeSugar derivativesSugar derivatives preparationSolventChemistry
The invention discloses a method for ultrasonically crystallizing rebaudiosideA, which comprises the following steps of: charging stevioside and dissolvent according to the quality volume ratio (kg:L) of 1:4-10; stirring, charging and heating to be the temperature of 40-80 DEG C; constantly keeping the temperature at 30-90 minutes; fast reducing the temperature to be 10-25 DEG C with the velocity of 5-15 DEG C per minute; sequentially statically crystallizing and recrystallizing for 3-12 hours, wherein the ultrasonic wave is adopted to perform auxiliary crystallizing and recrystallizing during statically putting; stirring and performing the ultrasonic wave for 5-15 minutes every 30-90 minutes; and performing solid-liquid separation, dissolution in a washing way, membrane separation, reduced pressure distillation and spray drying to the recrystallized crystalloid to obtain the high-purity rebaudiosideA. The method has the crystallizing time of only 6-24 hours, the rebaudiosideA yield which is more than 75%, even crystallizing grains, and the rebaudiosideA purity which reaches up to be more than 95%, meets the standards of American FDA, can be produced on a large scale, and has obvious effect.
Owner:GANZHOU JULONG HIGH TECH INDAL
Method for preparing lithium ion battery anode material xLiFePO4.yLi3V2(PO4)3
InactiveCN102208620AImprove rate discharge performanceThe synthesis process is simpleCell electrodesLithiumPhosphate
The invention discloses a method for preparing a lithium ion battery anode material xLiFePO4.yLi3V2(PO4)3, and relates to a method for preparing a lithium ion battery anode material. The method solves the technical problems of poor magnification performance and complex synthesis process in the conventional method for synthesizing the xLiFePO4.yLi3V2(PO4)3. The method comprises the following steps of: weighing lithium source, iron source, vanadium salt, phosphate and carbon source, mixing, and performing wet milling, pre-sintering and calcination to obtain the xLiFePO4.yLi3V2(PO4)3. The process is simple, and environmental pollution easily caused in a liquid phase method is not caused. The anode material prepared by the method has good magnification discharge performance; and during 10C discharge, the discharge specific capacity is 90mAh / g, and the capacity is nearly not attenuated after 20 times of cycles.
Owner:HARBIN INST OF TECH
Method for extracting levodopa from mucuna pruriens by continuous countercurrent ultrasonic technique
ActiveCN108033893AIncrease contentLow extraction temperatureOrganic compound preparationCounter-current extractionMucuna pruriensCrystallization
The invention belongs to the technical field of traditional Chinese medicine extraction, and particularly relates to a method for extracting levodopa from mucuna pruriens by a continuous countercurrent ultrasonic technique. The method comprises carrying out extraction on mucuna pruriens medicinal materials by adopting the continuous countercurrent ultrasonic method, carrying out filtering by an acid membrane, and carrying out recrystallization to obtain a levodopa crystal. Through detection, the purity of the levodopa product obtained by adopting the method is 99% or above, and the yield is 5.0% or above. And meanwhile, the protein in the mucuna pruriens dregs can be extracted by using alkali liquor. According to the method provided by the invention, levodopa can be rapidly and efficientlyextracted from the mucuna pruriens in a large scale, and after the filtering, the filtrate directly flows back and is used as an extraction liquid for recycling. The product has a short production period, low energy consumption and less environmental pollution.
Owner:北京颐方生物科技有限公司
Method and device for continuous preparation of lithium hexafluorophosphate
ActiveCN107244681AEfficient productionEfficient evaporation crystallization method and advanced DBT type continuous productionCell electrodesSecondary cellsEvaporationCirculating pump
The invention relates to a device and method for continuous preparation of lithium hexafluorophosphate. The device comprises a continuous evaporation crystallizer, a condensation recoverer, a heater, an ex-situ circulation pump, a product crystal delivery pump and a separation apparatus. Specifically, the continuous evaporation crystallizer is internally equipped with a stirrer, and the lower part of the continuous evaporation crystallizer is equipped with an elutriating leg; the ex-situ circulation pump, the heater, and the continuous evaporation crystallizer are connected in order; the elutriating leg is connected to the product crystal delivery pump; the product crystal delivery pump is connected to the separation apparatus; and the condensation recoverer is connected to the upper part of the continuous evaporation crystallizer. The invention employs an effective evaporative crystallization method and the advanced DBT type continuous efficient evaporation crystallizer to make the crystalline particles of lithium hexafluorophosphate more uniform, and effectively lowers the product investment cost and energy consumption per ton, thus realizing continuous, efficient and large-scale production of lithium hexafluorophosphate.
Owner:东营石大胜华新能源有限公司
Method for preparing electronic-grade nickel sulfate from nickel powder, crystallization device and control method of crystallization device
PendingCN113321248AIncrease the concentration of nickel ionsCrystalline Free Acid ControlSolution crystallizationNickel sulfatesAcid dissolutionHydrometallurgy
The invention discloses a method for preparing electronic-grade nickel sulfate from nickel powder, a crystallization device and a control method of the crystallization device, and relates to the technical field of non-ferrous metal hydrometallurgy. The method comprises the steps of oxidation, cooling, acid leaching, copper removal, acid adjustment, concentration, cooling crystallization, drying and screening, and secondary leaching, and is characterized in that in the oxidation step, the temperature of nickel powder in a calcining furnace is controlled to be 400-700 DEG C, the use amount of compressed air for each kilogram of nickel powder is 1-5 m3, and the reaction is carried out for 1.0-2.5 hours; the acid leaching comprises the following steps: putting the cooled nickel oxide in a reactor, controlling the temperature to be 45-70 DEG C, adding dilute sulfuric acid to control the pH value to be 0.5-1.5, and reacting for 1-3 hours. The invention also provides a crystallization device and a control method of the crystallization device. According to the method, metal nickel can be oxidized into divalent nickel oxide, hydrogen cannot be released when acid is added for dissolution, a large number of oxidizing agents do not need to be additionally added, new impurity ions are not added in the process, the nickel ion concentration is relatively improved, and nickel sulfate crystal particles are uniform.
Owner:HUNAN JINYUAN NEW MATERIALS CO LTD
Process for synthesizing doripenem lateral chain
InactiveCN102249970ABlocking will notUniform crystal particlesOrganic chemistryVulcanizationBiological activation
The invention discloses a process for synthesizing a doripenem lateral chain. According to the process disclosed by the invention, L-hydroxyproline is taken as a starting raw material, and the doripenem lateral chain is obtained through the following steps of: amino protection, carboxyl protection, hydroxyl activation, reduction reaction, acetyl vulcanization reaction and condensation reaction. The process provided by the invention has the advantages of simple and easily-obtained raw materials, no high-temperature and high-pressure reactions and no super-low-temperature reactions; the 'three wastes' generated in the production process mainly comprise waste liquid and the wastewater in the waste liquid is neutralized by appropriate acid and alkali and then is discharged after achieving the discharging standard; and the organic solvents in the waste liquid comprises dichloromethane, dichloromethane and alcohols and can be recycled to be reutilized so that the pollution on the environment is small.
Owner:HUANGSHAN SHEXIAN HONGHUI CHEM
Preparation method of vanadium-molybdenum-doped lithium ion battery cathode material
InactiveCN106532037AHigh capacity retentionImprove rate discharge performanceCell electrodesSecondary cellsCharge dischargeRetention ratio
The invention belongs to the field of ion batteries, particularly relates to a preparation method of vanadium-molybdenum-doped lithium ion battery cathode material, and is intended to solve the problem that an existing lithium ion battery has poor cycle stability. The preparation method comprises the steps of first, mixing a lithium source, a manganese source, a cobalt source, a nickel source, a vanadium source, a molybdenum source and a complexing agent, and dissolving in deionized water; second, adjusting pH, and drying; third, pre-burning, calcining, and cooling to room temperature to obtain the vanadium-molybdenum-doped lithium ion battery cathode material. The vanadium-molybdenum-doped lithium ion battery cathode material synthesized herein has uniform crystal particles; charge-discharge testing indicates that the cathode material has higher capacity retention ratio; cyclic voltammetry testing indicates that the material has good reversibility.
Owner:HARBIN INST OF TECH
Medicine composition without any excipients and preparation process thereof
ActiveCN101524345AImprove molding qualityGood lookingNervous disorderPharmaceutical delivery mechanismVacuum pressurePharmaceutical preservatives
The invention relates to a medicine composition without any excipients and a preparation process thereof; the invention carries out deep and careful research to the composition of sodium vedproate for injection and the preparation process, finally, the medical prescription, only containing effective ingredients: sodium vedproate and water, is determined. By adopting a plurality of critical processes in the adjusting and freeze-dry process, namely, in the pre-freezing step, the medicine composition is kept for a long time at the eutectic point of -2 degrees, so as to ensure a crystal nucleus to be big enough; vacuum pressure is adjusted in the steps of a first drying and a second drying, the action is repeated in a large-range vacuum degree with mass transferring and heat transmission principles. Under the condition that any excipients are not used, the appearance of the freeze-dry products and the compound dissolubility are remarkably improved, the freeze-dry time is obviously shortened, and the energy source is saved.
Owner:SHENYANG XINMA PHARMA
Process of ultrasonic wave electroplating of copper foil
The invention discloses a process of ultrasonic wave electroplating of copper foil. An electroplating solution is prepared, and cerous oxalate is added into the electroplating solution; ultrasonic cleaning with deionized water is carried out before electroplating; during electroplating, the cathode current density is 2.5A / dm3; the electroplating solution is oscillated and stirred by ultrasonic wave of 700-1200 w and 20-35 KHz. The process of the invention adopts ultrasonic wave stirring, which increases the current density, reduces concentration polarization, improves brightness, enables easy escape of hydrogen at the cathode surface, reduces burrs and pin holes, and obtains an electroplating layer with finer and uniform crystal particles.
Owner:江西省首诺铜业有限公司
Dual-core cage-shaped earth samarium (III) organic complex, and preparation method and application thereof
ActiveCN106928260AHas a binuclear cage structureImprove stabilityGroup 3/13 organic compounds without C-metal linkagesDual corePhenanthroline
The invention discloses a dual-core cage-shaped earth samarium (III) organic complex, and a preparation method and application thereof. The complex adopts o-chlorobenzoic acid as a main ligand and 1,10-phenanthroline as an auxiliary ligand, and has a dual-core cage-shaped structure; the preparation method is characterized by adopting the o-chlorobenzoic acid, samarium salt and the 1,10-phenanthroline as raw materials, synthesizing through a solvent method, and obtaining an Sm2(C7H5OClCOO)6(C12H8N2)2 crystal through self-volatilization crystallization. The preparation method is simple to operate, moderate in reaction condition, high in product yield, and uniform in crystal particles; the earth samarium (III) organic complex is stable in structure, is used as a catalyst to be applied to catalyzing binary acid and polyhydric alcohols for carrying out esterification reaction to prepare an alkyd resin, and shows excellent catalytic activity.
Owner:HENGYANG NORMAL UNIV
Organic amine template borate fluorescent material as well as preparation method and application thereof
InactiveCN103059833ASimple preparation processHigh yieldLuminescent compositionsSemiconductor devicesLuminous intensityPhotochemistry
The invention discloses an organic amine template borate fluorescent material as well as a preparation method and application thereof. The organic amine template borate fluorescent material is obviously enhanced in luminous intensity by obtaining a crystal by adopting hydrothermal reaction and carrying out heating treatment on the crystal. The molecular formula of the compound is C4H17N2B7O13, the space group of the compound is P-1(No.2), the unit cell parameters are as follows: a=8.8769(3), b=9.3204(2), c=10.2204(5), a=74.474 (2), beta=85.292 (5), g=72.730 (2), Z=4, and the unit cell volume V=778.01(5)<3>. The organic amine template borate fluorescent material disclosed by the invention is used for manufacturing a fluorescent luminous device.
Owner:GUANGDONG UNIV OF TECH
Production device utilizing salt cakes to produce refined brine and byproduct (dihydrate gypsum) and production method thereof
PendingCN107892313AUniform crystal particlesGood modification effectCalcium/strontium/barium sulfatesAlkali metal halide purificationSlurry reactorMagnesium salt
The invention relates to a brine refining technology, and specifically relates to a production device utilizing salt cakes to produce refined brine and a byproduct (dihydrate gypsum) and a productionmethod thereof. A magnesium removing reactor is connected to a buffering tank (I) through a pipeline; a calcium removing reactor is connected to a buffering tank (II) and a dihydrate gypsum slurry buffering barrel through pipelines; and a calcium removing clarifying barrel is connected to a primary brine buffering barrel and the dihydrate gypsum slurry buffering barrel through pipelines. Crude brine is added into the magnesium removing reactor; according to the amount of magnesium ions in the crude brine in the magnesium removing reactor, primary salt mud, which flows from the bottom of a magnesium removing clarifying barrel and the bottom of the magnesium removing reactor, is introduced into a primary salt mud buffering barrel; magnesium free crude brine from a magnesium free crude brinebuffering barrel is delivered to the calcium removing reactor by a magnesium free crude brine pump; low calcium clear liquid that overflows from the upper part of the calcium removing clarifying barrel is taken as primary brine, which is introduced to the primary brine buffering barrel, dihydrate gypsum slurry is pumped to a belt filter, and a dihydrate gypsum product is obtained after solid-liquid separation and washing. Due to the production of dihydrate gypsum, the byproduct (salt mud) is further reduced during the brine refining process.
Owner:TANGSHAN SANYOU CHEM IND
Purification method of cefepime dihydrochloride
ActiveCN109776572AIncrease contentLess impuritiesOrganic chemistryCefepime hydrochloridePurification methods
The invention discloses a purification method of cefepime dihydrochloride, and belongs to the field of chemical pharmacy. The method comprises the following steps: cefepime dihydrochloride arginine istaken as a raw material, a complexing agent is added in the dissolving solution of the cefepime dihydrochloride arginine for decoloration; and a dispersant and a crystallization agent are added intothe decolorated solution for crystallization, so as to finally obtain the cefepime dihydrochloride. The purification method can enable the cefepime dihydrochloride arginine which does not meet the quality standard to be fully recycled, therefore the prepared cefepime dihydrochloride has the advantages of high content, less impurities and high stability; and the preparation method is simple, energy-saving and environmental-friendly, thereby being suitable for large-scale industrial production.
Owner:NORTH CHINA PHARMA HEBEI HUAMIN PHARMA
Preparation method of lithium ion battery negative electrode material li4ti5o12
InactiveCN102285684AUniform crystal particlesHigh capacity retentionCell electrodesTitanium compoundsIonTube furnace
The invention discloses a preparation method of lithium ion battery negative electrode material Li4Ti5O12, which relates to a preparation method of battery negative electrode material. The invention solves the problems of inhomogeneity and poor electrochemical performance of the Li4Ti5O12 ion battery materials prepared in the prior art. The preparation method is as follows: 1. Prepare solution A; 2. Prepare solution B; 3. Pour solution B into solution A while stirring to form a suspension; 4. Evaporate the suspension to dryness to obtain a precipitate. After being ground into powder, it is transferred to a tube furnace and sintered to obtain Li4Ti5O12, a negative electrode material for lithium ion batteries. The synthesized Li4Ti5O12 crystalline particles of the present invention are uniform; charge and discharge tests show that the prepared Li4Ti5O12 has a higher initial discharge specific capacity and capacity retention rate, and the first discharge specific capacity of the prepared Li4Ti5O12 electrode is 140mAh g-1. After 50 cycles, the capacity The retention rate is not less than 97%.
Owner:HARBIN YUANFANG NEW ENERGY VEHICLE POWER BATTERY +1
Composite additive of thick-specification copper foil and production and preparing process of composite additive
ActiveCN106939432AUniform crystal particlesSmall crystal particlesElectroforming processesSulfonateCopper foil
The invention discloses a composite additive of a thick-specification copper foil and a production and preparing process of the composite additive. The composite additive comprises at least five compounds in DPS dimethyl-disulfide formamide sodium sulfonate, an MBT acid copper middle and low zone leveling agent, M2-sulfydryl benzimidazole, AEO fatty amine ethoxylate, PPNI hexyl benzyl amine salt, C8H17SO3K perfluorinated octyl sulfonate, macromolecule mass gelatin and hydrochloric acid. The thick-specification copper foil manufactured through the additive is more even and refined in electric crystalline particle, the copper foil has the high anti-pulling performance and extending rate performance, the anti-peeling strength is high, etching resistance is achieved, and the heat conduction and electric conduction performance after plate pressing is good; the above process is adopted, the copper foil aftertreatment process is reduced, and the production cost is saved; and in addition, the production efficiency is improved, and the extremely-high market prospect and economical value are achieved.
Owner:东强(连州)铜箔有限公司
Method for preparing magnesium-doped xLiFePO4.yLi3V2(PO4)3 lithium ion battery anode material
The invention discloses a method for preparing a magnesium-doped xLiFePO4.yLi3V2(PO4)3 lithium ion battery anode material, and relates to a method for preparing a lithium ion battery anode material. The method solves the problems of bad existence environment and high cost of prior lithium ion anode materials under the condition that the cycle performance of the lithium ion anode materials is ensured not to reduce. The method comprises the following steps of: weighing lithium source, iron source, vanadium salt, magnesium salt, phosphoric acid source and carbon source, mixing, and performing wet milling, pre-sintering and calcination to obtain the xLiFePO4.yLi3V2(PO4)3. The process is simple. The anode material prepared by the method has good magnification discharge performance; and during 10C discharge, the discharge specific capacity is 90mAh / g, and the capacity is nearly not attenuated after 20 times of cycles.
Owner:HARBIN INST OF TECH
A dinuclear cage rare earth samarium (iii) organic complex and its preparation method and application
ActiveCN106928260BHas a binuclear cage structureImprove stabilityGroup 3/13 organic compounds without C-metal linkagesDual coreCerium
The invention discloses a dual-core cage-shaped earth samarium (III) organic complex, and a preparation method and application thereof. The complex adopts o-chlorobenzoic acid as a main ligand and 1,10-phenanthroline as an auxiliary ligand, and has a dual-core cage-shaped structure; the preparation method is characterized by adopting the o-chlorobenzoic acid, samarium salt and the 1,10-phenanthroline as raw materials, synthesizing through a solvent method, and obtaining an Sm2(C7H5OClCOO)6(C12H8N2)2 crystal through self-volatilization crystallization. The preparation method is simple to operate, moderate in reaction condition, high in product yield, and uniform in crystal particles; the earth samarium (III) organic complex is stable in structure, is used as a catalyst to be applied to catalyzing binary acid and polyhydric alcohols for carrying out esterification reaction to prepare an alkyd resin, and shows excellent catalytic activity.
Owner:HENGYANG NORMAL UNIV
Method for refining cefpiramide acid
The invention discloses a method for refining cefpiramide acid, and belongs to the technical field of medicines. The method comprises the following steps: A, putting crude cefpiramide acid into a solvent 1, adding a transaminating agent, stirring and dissolving the mixture to clarification, so as to obtain a cefpiramide salt solution; B, adding a decolorizing agent into the cefpiramide salt solution, filtering and collecting filtrate; C, controlling the filtrate temperature to be 10-20 DEG C, adding a dissolution agent, filtering and collecting a solid crystal; D, putting the solid crystal into a solvent 2, controlling the temperature to be 10-15 DEG C, adding an acidic reagent to adjust the pH value to 2.0-3.0, adding a seed crystal, crystallizing, filtering and collecting the solid crystal of cefpiramide acid and mother liquor; and E, washing the solid crystal of cefpiramide acid and drying to obtain refined cefpiramide acid. The cefpiramide acid prepared with the method is high in purity, few in impurities and low in color grade; and the refining method provided by the invention has the advantages of being simple in process, environmentally friendly, and suitable for large-scaleindustrial production, saving energy, and the like.
Owner:NORTH CHINA PHARMA HEBEI HUAMIN PHARMA
Preparation method of lithium ion battery positive electrode material Li3V2(PO4)3
InactiveCN104466176AGood reversibilityUniform crystal particlesCell electrodesSecondary cellsElectrical batteryMixed materials
The invention provides a preparation method of a lithium ion battery positive electrode material Li3V2(PO4)3, and relates to the preparation method of the lithium ion battery positive electrode material. The performance of a lithium ion battery positive electrode is further improved on the basis of the prior art. The preparation method comprises the following steps: 1. weighing materials such as a lithium source, a vanadium source, a phosphorus source and a carbon source and mixing the materials; adding a hydrogen peroxide water solution into the mixed materials and carrying out ball milling; 2. treating; and 3. sintering. The lithium ion battery positive electrode material Li3V2(PO4)3 prepared by the preparation method has uniform crystallized particles, the grain diameter is less than 1 micron and the specific surface area is relatively large. The performance of the lithium ion battery positive electrode is relatively excellent.
Owner:HARBIN INST OF TECH
Carbon steel surface treatment method
ActiveCN107604351ASmall crystal particlesUniform crystal particlesMetallic material coating processesCarbon steelPeening
The invention provides a carbon steel surface treatment method. The carbon steel surface treatment method comprises the following steps: the surface shot blasting treatment is performed on carbon steel; and the surface of the shot-blasted carbon steel is blackened. Compared with the prior art, the carbon steel surface treatment method effectively combines the surface shot blasting with the blackening treatment; as the shot blasting treatment is firstly performed on the surface of the carbon steel, crystal particles of blackening films formed by subsequent blackening treatment are fine, uniformand compact; through the shot blasting treatment, the self-corrosion potential of the blackening films is improved, and the self-corrosion current density is reduced; and meanwhile, through the shotblasting treatment, the resistance of the blackening films is increased, and the saline immersion resistance is higher. As the shot blasting treatment is performed before the blackening treatment, thecorrosion resistance of the prepared blackening films can be improved.
Owner:GUANGDONG UNIV OF TECH
Freeze-drying technology of bortezomib for injection
ActiveCN110314221AReduce formationUniform crystal particlesPowder deliveryDipeptide ingredientsSurface concentrationFreeze-drying
The invention discloses a freeze-drying technology of bortezomib for injection. The freeze-drying technology comprises the steps of (1) pre-freezing; (2) primary drying; (3) resolution drying, whereinthe step of pre-freezing comprises the following sub-steps that (1a) the temperature of medicine liquid is lowered to -18--14 DEG C from room temperature and kept for 1-3 hours; (1b) the sample obtained in the sub-step (1a) is cooled to -45--35 DEG C at the cooling speed higher than or equal to 1.8 DEG C / min, and the temperature is kept for 2-3 hours; (1c) the sample obtained in the sub-step (1b)is heated to -22--20 DEG C, and the temperature is kept for 2-4 hours; (1d) the sample obtained in the sub-step (1c) is cooled to -45--35 DEG C, and the temperature is kept for 2-4 hours. According to the freeze-drying technology for the bortezomib, by optimizing the pre-freezing process and the primary drying process, the problems are effectively solved that in the pre-freezing process, due to surface concentration and a non-uniform crystalline structure, the freeze-drying efficiency is low, and a freeze-dried product is poor in clarity, slow in redissolution and high in water and solvent residue rate and the like, and the freeze-dried product is excellent in quality in various aspects.
Owner:SICHUAN HUIYU PHARMA
Semiconductor material and preparation method thereof
PendingCN113929586ALow costRich application contentAmino preparation from aminesOrganic chemistry methodsSemiconductor materialsPhysical chemistry
The invention discloses a semiconductor material and a preparation method thereof, in the structural general formula of the semiconductor material, R=H, Br, Cl or F, that is, the molecular formula of the semiconductor material is C30H48Cl9N3Sb2, C30H45Br3Cl9N3Sb2, C30H45Cl12N3Sb2 and C30H45Cl9F3N3Sb2, and the semiconductor material is of a crystal structure; the preparation method of the semiconductor material comprises the following steps: mixing a soluble compound containing Sb < 3 + > and a BTAB derivative, and carrying out self-assembly by adopting a solution natural volatilization solvent to prepare the material. The semiconductor material disclosed by the invention is relatively high in thermal decomposition temperature point and uniform in crystal particles; and meanwhile, the preparation process is simple, easy to operate, sufficient in raw material source, low in production cost, high in yield and high in repeatability.
Owner:JIANGSU UNIV OF SCI & TECH
A method and device for continuously preparing lithium hexafluorophosphate
ActiveCN107244681BReduce energy consumptionReduce energy consumption per tonCell electrodesSecondary cellsEvaporationCirculating pump
Owner:东营石大胜华新能源有限公司
A kind of carbon steel surface treatment method
ActiveCN107604351BSmall crystal particlesUniform crystal particlesMetallic material coating processesMetallurgyCorrosion current density
The invention provides a carbon steel surface treatment method. The carbon steel surface treatment method comprises the following steps: the surface shot blasting treatment is performed on carbon steel; and the surface of the shot-blasted carbon steel is blackened. Compared with the prior art, the carbon steel surface treatment method effectively combines the surface shot blasting with the blackening treatment; as the shot blasting treatment is firstly performed on the surface of the carbon steel, crystal particles of blackening films formed by subsequent blackening treatment are fine, uniformand compact; through the shot blasting treatment, the self-corrosion potential of the blackening films is improved, and the self-corrosion current density is reduced; and meanwhile, through the shotblasting treatment, the resistance of the blackening films is increased, and the saline immersion resistance is higher. As the shot blasting treatment is performed before the blackening treatment, thecorrosion resistance of the prepared blackening films can be improved.
Owner:GUANGDONG UNIV OF TECH
A kind of purification method of cefepime hydrochloride
Owner:NORTH CHINA PHARMA HEBEI HUAMIN PHARMA
Antimony trioxide powder crystal collection tube
ActiveCN113322507BImprove crystallization efficiencyGuaranteed stabilityPolycrystalline material growthGas current separationPhysical chemistryEngineering
The invention discloses a crystallization collection tube for antimony trioxide powder, which comprises a crystallization tube, an annular collection chamber provided outside the crystallization tube, and a connecting flange located at the feeding port of the crystallization tube. The inside of the crystallization tube is composed of A partition, a support ring, a swing assembly, a movable crystal cover and a control rod are arranged from bottom to top. The antimony trioxide powder crystal collection tube in the present invention is specially used for the crystal collection of antimony trioxide, and the movable crystal cover obtains three The furnace gas with saturated concentration of antimony oxide is then crystallized, and two different swirls, inner and outer, are formed inside the movable crystallization hood, and a quenching environment is formed inside the movable crystallization hood. Both can produce gains, and the crystallization effect is good.
Owner:HUNAN LOUDI HUAXING ANTIMONY IND
New crystal form of riociguat and preparation method thereof
PendingCN111689961AStable chemical and physical propertiesUniform crystal particlesOrganic chemistry methodsEthyl acetateFilter cake
The invention discloses a new crystal form of riociguat and a preparation method thereof. The crystal form has peak values at the positions of 6.73, 9.05, 14.29, 17.73, 19.73, 20.29, 20.99, 25.54, 27.30 and 32.67 (2[theta]+ / -0.2) in an X-ray powder diffraction pattern. The preparation method of the crystal form comprises the following steps: firstly, heating and dissolving riociguat with DMSO, then adding ethyl acetate, stirring at a controlled temperature, and filtering to obtain filter cake A; and adding ethyl acetate, heating to reflux, pulping, cooling, stirring, filtering to obtain filtercake B, and drying in vacuum to obtain the new crystal form of the riociguat. The new crystal form of the riociguat prepared by the method has stable chemical and physical properties and uniform crystal particles, is suitable for long-term storage, and is convenient for the preparation process of preparations.
Owner:江苏华阳制药有限公司
Industrial antimony trioxide production device
ActiveCN113277556AImprove crystallization efficiencyGuaranteed stabilityAntimony oxides/hydroxides/oxyacidsEnergy inputMetallurgyPhysical chemistry
The invention discloses an industrial antimony trioxide production device which comprises a reaction furnace, an air blowing pipe, a crystallization pipe and a collection chamber, a metal antimony feeding port is formed in one side of the reaction furnace, a rotation starting assembly, a movable crystallization cover and a control rod are arranged in the crystallization pipe from bottom to top, and the control rod is connected with the top of the movable crystallization cover and the top of the crystallization pipe. The antimony trioxide production device is used for producing antimony trioxide, furnace gas with saturated antimony trioxide concentration is obtained through the movable crystallization cover and then is crystallized, the crystallization efficiency can be effectively improved, crystal particles are kept uniform, and the stability of product quality is kept; and the crystallization efficiency and the lens particle uniformity are also improved by two different inner and outer rotational flows in the movable crystallization cover.
Owner:HUNAN LOUDI HUAXING ANTIMONY IND
A copper coordination polymer and its preparation method, crystal and use
ActiveCN112300405BGood molecular structure stabilityAntiferromagnetic coupling performance is goodAntibacterial agentsAntiferromagnetic materialsPolymer scienceAntimicrobial drug
The invention discloses a copper coordination polymer. The polymer comprises a repeating structural unit of formula I: the polymer has a multi-nuclear structure, and the molecular structure of the polymer is stable; the invention also discloses a preparation method of the polymer, Add 2,2′-biphenyldicarboxylic acid, copper salt, 3-(2-pyridyl)-1,2,4-triazole to the mixture of organic components and water, and adjust the pH value to 4-8 , react, and place it at room temperature after the reaction, and the polymer synthesized by this method has the advantages of simple method, convenient purification, high yield, and good stability in air; the present invention also discloses the crystal of the polymer, and the present invention The polymer is used in the preparation of antiferromagnetic materials and antibacterial drugs.
Owner:HUNAN INST OF TECH
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