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41 results about "Hydrazine monohydrate" patented technology
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Hydrazine, Monohydrate (79 Percent) TCI-H0204 | 7803-57-8 Hydrazine, Monohydrate (79 Percent) - 25 g, also known as Diamine or Diazane, is usually used as a foaming agent in preparing polymer foams.
Surface modified particle diameter mixed silver powder and preparation method thereof
The invention provides surface modified particle diameter mixed silver powder and a preparation method thereof. The preparation method comprises the following steps of: adding an alcoholic solution containing 0.3-3.0mol / L of silver nitrate aqueous solution, a pH modifier and an alcohol or ester surface modifier into a reducing solution containing hydrazine monohydrate or ascorbic acid in a parallel flow mode; under a high-shear stirring action, reacting for 20-100min in a stainless steel reaction kettle; regulating reaction temperature to be 20-50DEG C and the pH value to be 1-14 to select a control range; reducing precipitated silver powder in one step; synchronously carrying out surface treatment on silver powder surface, wherein the silver powder is quickly precipitated because the surface of the silver powder is non-hydrophilic, and solid and liquid are extremely easy to separate; washing with deionized water; drying at 50-80DEG C; and smashing and screening to obtain the surface modified silver powder. The preparation method of the silver powder is characterized in that the particle diameter can be adjustably changed between the nanometer / micron scale and the micron / micron scale. The silver powder obtained with the preparation method has the advantages of good silver powder dispersibility, high tap density, good filling property and good affinity solubility with an organic carrier, is extremely easy to disperse in slurry to form silver paste with high solid content, and is especially suitable for pouring in holes and for solar cell silver paste.
Owner:ZHEJIANG GUANGDA ELECTRONICS TECH
Quaternary ammonium salt group containing polysiloxane block copolymer and preparation method and application
ActiveCN105885054AGood water solubilityEnhanced inhibitory effectBiocideFungicidesQuaternary ammonium cationHalohydrocarbon
The invention discloses a quaternary ammonium salt group containing polysiloxane block copolymer and a preparation method and application. The primary amino in BAPTMDS is protected, and the obtained BAPTMDS-PA2 reacts with D4 and D4H to obtain hydrogen containing polysiloxane; the hydrogen containing polysiloxane reacts with DMAA to obtain tertiary amino polysiloxane; the tertiary amino polysiloxane reacts with hydrazine hydrate to obtain tertiary amino polysiloxane with terminated amino; D3 reacts with an n-butyl lithium solution to obtain single-ended hydrogen containing polysiloxane; the single-ended hydrogen containing polysiloxane reacts with tBMA to obtain single-ended ester-based polysiloxane; the single-ended ester-based polysiloxane reacts with sulfuric acid to obtain single-ended carboxyl polysiloxane; the single-ended carboxyl polysiloxane reacts with the tertiary amino polysiloxane with terminated amino and then reacts with halohydrocarbon to obtain the quaternary ammonium salt group containing polysiloxane block copolymer. The copolymer can effectively adhere to the hydrophobic surfaces of plant leaves and the like and plays the role of preventing plant fungi diseases.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of Cu (2+) color indicator based on rhodamine B-2-formaldehyde thiophene derivative
InactiveCN103087071AImprove anti-interference abilityWide pH rangeOrganic chemistryMaterial analysis by observing effect on chemical indicatorAnti jammingHydrazine compound
The invention relates to a copper ion detection agent, and particularly relates to a preparation method of a Cu(2+) color indicator based on rhodamine B-2-formaldehyde thiophene derivative. The method comprises the step of firstly, carrying out condensation reaction on rhodamine B and hydrazine monohydrate to obtain hydrazine rhodamine B, wherein the hydrazine rhodamine B reacts with 2-thiophenecarboxaldehyde to obtain the rhodamine B-2-formaldehyde thiophene derivative; and water-ethanol mixed solution based on the rhodamine B-2-formaldehyde thiophene derivative can be used as the Cu(2+) color indicator. The preparation method can be used for rapidly analyzing an efficient color indicator with special Cu (2+) content in a water sample, is strong in anti-jamming capability on the other metal ions (Zn(2+), Cr(3+), Fe(3+), Cd(2+), Mn(2+), Hg(2+), Fe(2+), Pb(2+), Ba(2+) and Ag(+)), and is the efficient Cu(2+) color indicator; the applicable pH range is from faintly acid to neutral property; the response time of the Cu2(+) color indicator on the Cu2(+) is 3 minutes; and the lowest detection limit is 1.7*10(-7)mol / L. The preparation method has the advantages of being simple in synthetic process, low in cost, simple and convenient to operate, good in selectivity, high in sensitivity, high in response speed, low in detection limit, wide in application prospect and the like, can be used for real-time and rapid measurement of complicated samples, and also can be used for semi-quantitative detection of environmental sample tiny / trace Cu(2+) from different sources.
Owner:TONGJI UNIV
Process for simultaneous preparation of nanocystalline anatase titanium dioxide powder and hydrazine monohydrochloride
InactiveUS20050106095A1Inhibition of agglomerationMaterial nanotechnologyTitanium dioxideHydrazine compoundHydrazine monohydrate
The present invention relates to an environmentally benign process for the simultaneous preparation of nanocrystalline anatase titanium dioxide and hydrazine mohydrochloride, in substantial amounts from the acidic aqueous titanium tetrachloride solution by reacting with hydrazine monohydrate at ambient conditions of temperature and pressure. The process of the present invention is simple, easy to operate, pollution free, high in product purity and homogeneous in product particle.
Owner:COUNCIL OF SCI & IND RES
Manufacturing method of bamboo charcoal supporting silver and products thereof
InactiveUS20080254980A1High antibacterial efficiencyCosmetic preparationsBiocideBamboo charcoalEthanol
The BC powders (particle size<10 μm, Taiwan Paiho) are activated with surfactant sodium alginate under stirred for 1 h. The as-prepared BC powders (2 g) are immersed into 100 mL of biamminesilver nitrate ([Ag(NH3)2]NO3) solutions, which are formed by adding 25 wt. % aqueous ammonia into AgNO3 solution at room temperature. After stirring for 1 h, dilute aqueous solutions of hydrazine monohydrate are separately prepared and introduced to the BC-AgNO3 solutions in appropriate quantities (molar ratio 1:1 with respect to silver nitrate) by a syringe. Stirring is continued under inert atmosphere at room temperature for another 4 h. The BC / Ag particles are separated and washed with deionized water and ethanol, then dried in vacuum at 60° C. for overnight.
Owner:NATIONAL DEFENSE UNIVERSITY
Manufacturing method of bamboo charcoal supporting silver and products thereof
The BC powders (particle size<10 μm, Taiwan Paiho) are activated with surfactant sodium alginate under stirred for 1 h. The as-prepared BC powders (2 g) are immersed into 100 mL of biamminesilver nitrate ([Ag(NH3)2]NO3) solutions, which are formed by adding 28 wt. % aqueous ammonia into AgNO3 solution at room temperature. After stirring for 1 h, dilute aqueous solutions of hydrazine monohydrate are separately prepared and introduced to the BC-AgNO3 solutions in appropriate quantities (molar ratio 1:1 with respect to silver nitrate) by a syringe. Stirring is continued under inert atmosphere at room temperature for another 4 h. The BC / Ag particles are separated and washed with deionized water and ethanol, then dried in vacuum at 60° C. for overnight.
Owner:NATIONAL DEFENSE UNIVERSITY
Oil-soluble chitosan derivative and preparation method and application thereof
InactiveCN109575155AImprove solubilityGood solubility and dispersibilityAdditivesFreeze-dryingOxidation resistant
The invention provides a preparation method of an oil-soluble chitosan derivative. The preparation method is characterized by including following steps: 1), adding chitosan into N, N-dimethylformamidecontaining water, adding phthalic acid for first reaction, and filtering and washing after reaction is finished to obtain an intermediate product; 2), adding the intermediate product and fatty acid acyl chloride into an isopropanol solvent for second reaction, using hydrazine monohydrate and sodium hydroxide water solution to treat a product, using distilled water to wash the product after freeze-drying, and freeze-drying to obtain oil-soluble chitosan. The invention further provides the oil-soluble chitosan derivative and application thereof. The preparation method has the advantages of being easy-to-get in raw material, high in environment friendliness and wide in application prospect, and O-acylated chitosan prepared by the method can be widely applied in the field of antioxidation ofplant insulating oil.
Owner:HUBEI ENG UNIV
FIB Process for Selective and Clean Etching of Copper
InactiveUS20120211356A1Reduce volatilityHigh stickinessVacuum evaporation coatingSputtering coatingDielectricEtching
Etch assisting agents for focused ion beam (FIB) etching of copper for circuit editing of integrated circuits both prevent loss of adjacent dielectric due to sputtering by the ion beam, and render sputtered re-deposited copper on adjacent surfaces non-conductive to avoid electrical short circuits. The agents are characterized by having an N—N (N being Nitrogen) bonding in their molecules and boiling points between about 70° C. and about 220° C., and include hydrazine and water solutions, hydrazine derivatives, NitrosAmine derivatives saturated with two hydrocarbon groups selected from Methyl, Ethyl, Propyl and Butyl, NitrosAmine related compounds, and Nitrogen Tetroxide. Preferred agents are Hydrazine monohydrate (HMH), HydroxyEthylHydrazine (HEH), CEH, BocMH, BocMEH, NDMA, NDEA, NMEA, NMPA, NEPA, NDPA, NMBA, NEBA, NPYR, NPIP, NMOR and Carmustine, alone or in combination with Nitrogen Tetroxide. The agents are effective for etching copper in high aspect ratio (deep) holes.
Owner:TIZA LAB
Amphipathic chitosan with chemical crosslinking characteristic and preparation method thereof
InactiveCN101942098AEffective protectionAvoid introducingBiocompatibility TestingPolyethylene glycol
The invention discloses amphipathic chitosan with a chemical crosslinking characteristic and a preparation method thereof. The method comprises the following steps of: reacting chitosan with long-chain aliphatic aldehyde to obtain N-long-chain alkyl chitosan; reacting the N-long-chain alkyl chitosan with phthalic anhydride; reacting an obtained product with iodo-polyethylene glycol monomethyl ether; and performing a deprotection reaction on an amino group by using hydrazine hydrate to obtain N-long-chain alkyl-O-polyglycol chitosan. In a preparation process, the method effectively protects the amino group in a chitosan molecule, avoids introducing a polyglycol group on the amino group, and remains part amino group in the amphipathic chitosan by removing the amino group protection; the product can serve as a precursor for preparing amphipathic chitosan hollow microcapsules; and polyethylene glycol with high biocompatibility, low toxicity and easy degradation is introduced on a hydroxyl group of the chitosan to serve as a hydrophilic group, so that the research and application values of the derivative on a medicament carrier are improved.
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
FIB Process for Selective and Clean Etching of Copper
InactiveUS20110048931A1Prevent electrical short circuitingReduce volatilityVacuum evaporation coatingSputtering coatingDielectricEtching
Etch assisting agents for focused ion beam (FIB) etching of copper for circuit editing of integrated circuits both prevent loss of adjacent dielectric due to sputtering by the ion beam, and render sputtered re-deposited copper on adjacent surfaces non-conductive to avoid electrical short circuits. The agents comprise hydrazine and hydrazine derivatives having an N—N(N being Nitrogen) bonding in their molecules and boiling points between about 70° and 220° C., and NitrosAmine derivatives saturated with two hydrocarbon groups selected from Methyl, Ethyl, Propyl and Butyl. Preferred agents are Hydrazine monohydrate (HMH), HydroxyEthylHydrazine (HEH), NDMA, NMEA, NDEA, NMPA, NEPA, NDPA, NMBA or NEBA, alone or in combination with Nitrogen Tetroxide. The agents are effective for etching copper in high aspect ratio (deep) holes.
Owner:TIZA LAB
Process for simultaneous preparation of nanocrystalline anatase titanium dioxide powder and hydrazine monohydrochloride
InactiveUS7510694B2Inhibition of agglomerationMaterial nanotechnologyTitanium dioxideHydrazine compoundHydrazine monohydrate
The present invention relates to an environmentally benign process for the simultaneous preparation of nanocrystalline anatase titanium dioxide and hydrazine mohydrochloride, in substantial amounts from the acidic aqueous titanium tetrachloride solution by reacting with hydrazine monohydrate at ambient conditions of temperature and pressure. The process of the present invention is simple, easy to operate, pollution free, high in product purity and homogeneous in product particle.
Owner:COUNCIL OF SCI & IND RES
Multifunctional self-repairing polyurethane reticulate pattern coating and preparation method thereof
InactiveCN110607122AQuick protectionInhibition of anti-corrosion effectAnti-corrosive paintsPolyurea/polyurethane coatingsDecompositionActive matter
The invention provides a multifunctional self-repairing polyurethane reticulate pattern coating and a preparation method thereof. The multifunctional self-repairing polyurethane reticulate pattern coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of hexanediol polycarbonate, 20 to 30 parts of isophorone diisocyanate, 5 to 10 parts of dimethylolpropionic acid,2 to 2.5 parts of triethylamine, 0.5 to 1 part of diethylene glycol, 0.2 to 0.5 part of hydrazine monohydrate, 20 to 25 parts of a nano active matter-bimetal layered polymer, 20 to 25 parts of a metalinorganic salt-porous material, 7-10 parts of a leveling agent, and 5-10 parts of a pigment. Two different nano containers are used for respectively packaging two inhibitors aiming at different corrosion triggering mechanisms and protection mechanisms; and moreover, polycarbonate adipate into which a carbonate part is introduced is used as a matrix of the polyurethane coating, and meanwhile, acid-base, microorganism and rainwater residues are resisted, so that the polyurethane coating has the characteristics of good ageing hydrolysis resistance, oil resistance, weather resistance and microorganism decomposition corrosion resistance.
Owner:无锡新而奇化工科技有限公司
Preparation method of high-selectivity Hg<2+> color indicator based on Rhodamine B thiohydrazine derivative
InactiveCN104614369AQuick responseRapid analysis of Hg in water samples
<sup>2+</sup>
high selectivityMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsHydrazine compoundHigh selectivity
The invention relates to a preparation method for a high-selectivity Hg<2+> color indicator based on a Rhodamine B thiohydrazine derivative. The preparation method comprises the following steps: performing condensation reaction on Rhodamine B and hydrazine monohydrate to generate Rhodamine B hydrazine; performing reaction on the Rhodamine B hydrazine and a Lawesson reagent; after replacing a carbonyl oxygen atom in the Rhodamine B hydrazine with a sulphur atom capable of selectively identifying heavy metal Hg<2+>, obtaining the Rhodamine B thiohydrazine derivative, wherein a water-ethanol mixed solution based on the Rhodamine B thiohydrazine derivative can be taken as an Hg<2+> color indicator. The high-selectivity Hg<2+> color indicator based on the Rhodamine B thiohydrazine derivative can be used for quickly analyzing the content of appointed Hg<2+> in a water sample; the high-selectivity color indicator has high anti-interference capability to other metal ions, a suitable pH range is from weak acidity to neutrality; the high-selectivity Hg<2+> color indicator has the advantages of simple synthesis process, low cost, simpleness and convenience in operation, good selectivity, high sensitivity, high response speed, low limit of detection, wide application prospect and the like, and can be applied to real-time and quick measurement of complex samples.
Owner:TONGJI UNIV
Preparation method, product and application of Te nanomaterial with controllable morphology
PendingCN113912025AGood electrical propertiesImprove performanceElemental selenium/telluriumPyrrolidinonesHydrazine monohydrate
The invention discloses a preparation method, a product and application of a Te nanomaterial with controllable morphology, and relates to the technical field of preparation of Te materials. The preparation method comprises the following steps: adding polyvinylpyrrolidone, an alkaline solution and hydrazine monohydrate into an aqueous sodium tellurite solution, and carrying out a hydrothermal reaction to obtain the morphology-controllable Te nanomaterial. When the average molecular weight of the polyvinylpyrrolidone is 8000, the morphology of the prepared Te nanomaterial is in a two-dimensional sheet shape; and when the average molecular weight of the polyvinylpyrrolidone is 360000 or 1300000, the morphology of the prepared Te nanomaterial is in a one-dimensional linear shape. By changing the average molecular weight of PVP, the growth speed of each crystal face of a Te material can be different, so the Te nanomaterial with a two-dimensional sheet shape and a small aspect ratio or with a one-dimensional linear shape and a large aspect ratio is respectively prepared.
Owner:HENAN NORMAL UNIV
Manufacturing method of floor with high antibacterial performance
InactiveCN108058256AImprove antibacterial propertiesGuaranteed aestheticsRadiation/waves wood treatmentWood treatment detailsAcrylic resinDodecylsulfonic acid
The invention relates to a manufacturing method of a floor with a high antibacterial performance. The manufacturing method of the floor with the high antibacterial performance belongs to the technicalfield of building materials and comprises the following steps of immersion treatment, microwave treatment and hot pressing treatment. A preparation method of a nano silver water solution comprises the following steps of adding a sodium dodecyl sulfate solution into a silver nitrate solution to obtain a mixed liquid, wherein the molar ratio of sodium dodecyl sulfate to silver nitrate is 2:1; adopting nano silver as a solute, dissolving the nano silver into deionized water; and adopting an acrylic resin as a complexing agent and a stabilizer, dissolving the acrylic resin into the deionized water, and then adding a dispersing agent and a reducing agent at the same time so as to form a solution, wherein the dispersing agent is triethanolamine, the mass content of the triethanolamine in the solution is 1 to 3 percent, the first reducing agent is a hydrazine monohydrate water solution, and the content of the hydrazine monohydrate water solution in the solution is 0.2 to 0.4 percent. Compared with a traditional manufacturing method of the floor, according to the manufacturing method of the floor with the high antibacterial performance provided by the invention, the floor is poorer in wear resistance and high in performance cost ratio, bacteria and mildews cannot easily breed on the floor and a glue spraying part, the attractiveness and the use performance of the floor are ensured, and the antibacterial performance of the composite floor is improved.
Owner:安徽信耀玻璃有限公司
Preparing method of TiO2/MoS2 ultra-thin nanosheet array composite
ActiveCN110106519ARich sourcesThe method is reproducibleElectrolytic organic productionNanotechnologyPolymer scienceN dimethylformamide
The invention discloses a preparing method of a TiO2 / MoS2 ultra-thin nanosheet array composite. The method includes the steps of S1, conducting ultrasonic processing on a molybdenum net in an acetonesolution, an ethanol solution, a hydrochloric acid solution and high-purity water sequentially, taking out the molybdenum net, and drying the molybdenum net in a vacuum drying box; S2, adding ammoniumtetrathiomolybdate, N,N-dimethylformamide and hydrazine monohydrate into a reaction still to be stirred; S3, putting the molybdenum net into the reaction still, screwing down the reaction still, putting the reaction still into an oven, and conducting hydrothermal reaction for 15 hours at 200 DEG C; S4, conducting cooling until the room temperature is reached, taking out the molybdenum net, ultrasonically washing the molybdenum net with distilled water and absolute ethyl alcohol sequentially, drying the molybdenum net in the drying box at 65 DEG C, and depositing TiO2 on an atom layer of the obtained molybdenum net to obtain the TiO2 / MoS2 ultra-thin nanosheet array composite. The preparing method is rich in raw material source, green in synthesis route and high in repeatability; the composite can be used for electro-catalytically reducing CO2, is high in catalytic activity and easy to operate and has high application value and practical value and broad development prospects.
Owner:WENZHOU UNIVERSITY
Preparation method of Olaparib
The invention discloses a preparation method of Olaparib. The preparation method comprises the following steps: carrying out a reaction between phthalide (II) and 3-bromo-4-fluorobenzaldehyde (III) toobtain a compound IV, carrying out a reaction between the compound IV and hydrazine monohydrate to obtain a compound V, and carrying out a reaction between the compound V and 1-cyclopropylcarbonylpiperazine to obtain the final product of Olaparib (I). The raw materials used in the reaction are cheap and easy to obtain, and the preparation method is simple in process route, high in total yield andfew in byproducts and is applicable to industrial production.
Owner:SHANDONG YUXIN PHARMA CO LTD
Floor-board with low free formaldehyde release and furniture production method
The invention relates to a production method of floor and furniture with low free formaldehyde emission. The formaldehyde removal catalyst consists of urea and its derivatives, amine and its derivatives, ammonium salt, hydrazine hydrate and its derivatives, salt, acid, penetrating agent and Composition of water; based on 100 parts of formaldehyde removal catalyst, the dosage of urea and its derivatives is 10-30 parts, the dosage of amine and its derivatives is 1-15 parts, the dosage of ammonium salt is 3-20 parts, hydrazine hydrate and The amount of its derivatives is 1-9 parts, the amount of salt is 1-15 parts, the amount of acid is 0.01-2 parts, the amount of penetrant is 0.05-7 parts, and the rest is water; even if E2 or FC2, and The wood-based panels with the above free formaldehyde emission can be treated with this method, without changing the production process of the floor and furniture, so that the free formaldehyde emission in the floor or furniture is ≤0.3mg / L, and the formaldehyde concentration in the indoor air meets the national standards. Regulations on indoor air quality standards.
Owner:罗文圣 +1
Di(4-trifluoromethylbenzyl) azodiformate, intermediate and preparation method of di(4-trifluoromethylbenzyl) azodiformate
The invention discloses a novel azo-type reagent of di(4-trifluoromethylbenzyl) azodiformate, an intermediate, and a preparation method of di(4-trifluoromethylbenzyl) azodiformate. The preparation method comprises the following steps in sequence: taking 4-trifluoromethylbenzyl alcohol and triphosgene as raw materials and taking chloralkane as a solvent; performing reaction in an ice-water bath to produce 4-trifluoromethylbenzyl chloroformate; after washing the reacting liquid with a weakly alkaline solution, slowly adding hydrazine monohydrate drop by drop at a room temperature to obtain di(4-trifluoromethylbenzyl) hydrazinodiformate; and obtaining di(4-trifluoromethylbenzyl) azodiformate from di(4-trifluoromethylbenzyl) hydrazinodiformate through oxidation by an oxidizing agent. According to the invention, the preparation method of di(4-trifluoromethylbenzyl) azodiformate is mild in condition, less in step, simple in operation, and high in yield.
Owner:ZHEJIANG UNIV
Amphipathic chitosan with chemical crosslinking characteristic and preparation method thereof
InactiveCN101942098BEffective protectionAvoid introducingBiocompatibility TestingPolyethylene glycol
The invention discloses amphipathic chitosan with a chemical crosslinking characteristic and a preparation method thereof. The method comprises the following steps of: reacting chitosan with long-chain aliphatic aldehyde to obtain N-long-chain alkyl chitosan; reacting the N-long-chain alkyl chitosan with phthalic anhydride; reacting an obtained product with iodo-polyethylene glycol monomethyl ether; and performing a deprotection reaction on an amino group by using hydrazine hydrate to obtain N-long-chain alkyl-O-polyglycol chitosan. In a preparation process, the method effectively protects the amino group in a chitosan molecule, avoids introducing a polyglycol group on the amino group, and remains part amino group in the amphipathic chitosan by removing the amino group protection; the product can serve as a precursor for preparing amphipathic chitosan hollow microcapsules; and polyethylene glycol with high biocompatibility, low toxicity and easy degradation is introduced on a hydroxylgroup of the chitosan to serve as a hydrophilic group, so that the research and application values of the derivative on a medicament carrier are improved.
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
Chemical plating solution for ZrO2 oxygen sensor electrode and preparation method and application of chemical plating solution
PendingCN112695307AShorten the timeReduce heavy useLiquid/solution decomposition chemical coatingPlatinumChemical plating
The invention discloses a chemical plating solution for a ZrO2 oxygen sensor electrode and a preparation method and application of the chemical plating solution. The chemical plating solution comprises main salt, a reducing agent and a complexing agent, and the reducing agent comprises sodium borohydride and one or two of isonicotinic acid hydrazide or hydrazine monohydrate. The invention also provides a method for chemically plating a ZrO2 oxygen sensor electrode by using the chemical plating solution. Through the combined action of various reducing agents in the chemical plating solution, the chemical plating time is shortened, the efficiency is improved, and meanwhile, a chemical plating layer is uniform, so that the electrode performance can be ensured under the condition of low thickness, the use of a large amount of platinum is reduced, and the cost is reduced. Meanwhile, the invention further designs a protection device at the position except the position needing to be plated in the chemical plating process, and it is guaranteed that the electrode area of the plated ceramic part is controllable.
Owner:深圳聚德寿科技有限公司
A method for preparing one-dimensional magnetic nanowires for biochemical analysis
ActiveCN109732097BStrong magnetic capture separation efficiencyMagnetic capture separation efficiency is lowMaterial nanotechnologyMicrosphereHydrazine monohydrate
The invention discloses a method for preparing a one-dimensional magnetic nanowire for biochemical analysis, comprising the following steps: mixing 0.5-1.5 mol / L nickel chloride aqueous solution and ethylene glycol in a volume ratio of 1:8-10 Mixing is component A; sodium hydroxide and ethylene glycol are mixed in a weight ratio of 1-10:96, stirred, and hydrazine monohydrate is added until the concentration of hydrazine monohydrate is 0.05-0.3mol / L, namely as component B; then react component A with component B to form nickel nanowires, and then pass through SiO 2 The one-dimensional magnetic nanowires of the present invention are prepared by coating and amination or carboxylation. Compared with the magnetic microspheres in the prior art, the specific magnetization of the one-dimensional magnetic nanowires of the present invention has an order of magnitude improvement, high magnetic capture and separation efficiency, significantly increased specific surface area, and significantly enhanced detection sensitivity. In addition, it can also Provide multi-target markers and provide basic materials for the development of multi-marker simultaneous detection methods.
Owner:珠海启尼亚生物技术有限公司
A kind of method for preparing modified graphene polyvinyl alcohol composite film
ActiveCN105315476BWide variety of sourcesGood chemical stability7-amino-4-methylcoumarinComposite film
The invention discloses a method for preparing a modified graphene-polyvinyl alcohol composite film. The modifier of the invention is 7-amino-4-methylcoumarin, and the invention is hydrazine hydrate, vitamin C or glucose, etc. Chemical reducing agent; first prepare modified graphene, then prepare the dispersion of modified graphene, then add the dispersion of modified graphene to polyvinyl alcohol aqueous solution to obtain uniformly dispersed modified graphene-polyvinyl alcohol Mixed solution; finally, pour the mixed solution into a container, and dry it at 40-70 degrees Celsius to constant weight in the atmosphere or in a vacuum environment to obtain a modified graphene / polyvinyl alcohol composite film. Wherein, the mass fraction of modified graphene is 0.1%-10%. The invention has the advantages of simple preparation, mild reaction conditions, easy operation and control, and the like.
Owner:无锡市钱氏功能塑胶有限公司
Solvothermal preparation method of regular-octahedral calcium sulfide particles
ActiveCN107539958AHigh purityLow priceMagnesium/calcium/strontium/barium sulfides/polysulfidesEthylenediamineSpherical shaped
The invention discloses a solvothermal preparation method of regular-octahedral calcium sulfide particles. The solvothermal preparation method comprises that regular-octahedral CaS particles with uniform sizes are prepared from sublimed sulfur as a sulfur source, calcium chloride as a calcium source, ethylenediamine as a reaction solvent, L-cysteine and ethylenediaminetetraacetic acid (EDTA) as chelating agents and a hydrazine monohydrate as a reductant through a solvothermal method. Through change of concentrations of the chelating agents and reductant in a reactor, Ca<2+> and S<2-> release rates are controlled so that the dissolution-recrystallization rate of the CaS particles is controlled. Through adjusting reaction time, CaS spherical particles are recrystallized to form regular-octahedral particles. The solvothermal preparation method has the characteristics of simple operation, mild conditions, safety and environmental friendliness, is suitable for large-scale production and hasa wide industrial prospect.
Owner:QINGDAO UNIV OF SCI & TECH
Method for preparing tellurium nanocrystals
InactiveCN101920940BControl shapeEffective control of morphologyElemental selenium/telluriumTe elementReducing agent
The invention relates to a method for preparing tellurium nanocrystals. The conventional method cannot effectively control the morphologies of the tellurium nanocrystals. The method comprises the following steps of: preparing aqueous solution of tellurium acid according to the morphology required by the prepared tellurium nanocrystals; adding a reducing agent hydrazine monohydrate into the aqueous solution of the tellurium acid to form black suspension solution, and pouring into a hydrothermal reactor for hydrothermal reaction at the temperature of between 100 and 120 DEG C for 12 to 24 hours; and centrifuging to separate the reaction products, and washing and drying the solid product to obtain the tellurium nanocrystals. The morphologies of the tellurium nanocrystals can be controlled bychanging the concentration of the aqueous solution of tellurium acid in the reaction system, so the nanocrystals in different morphologies such as nanoparticles, short nanorods and long nanorods can be respectively obtained. The method has the advantages of simple process and stable reaction system; and the obtained tellurium nanocrystals have better uniformity and the morphologies of the obtained tellurium nanocrystals can be effectively controlled.
Owner:NANTONG JINNIU MACHINERY MFR
Method for preparing nanometer silver composite sol
The invention relates to a nano-silver composite sol and a preparation method thereof. The raw materials of the sol include silver nitrate solution, zinc nitrate solution, ferric nitrate solution, copper nitrate solution, surfactant, hydrazine hydrate and a dispersant. When preparing the composite sol, first mix the silver nitrate solution, zinc nitrate solution, iron nitrate solution, and copper nitrate solution, then add the surfactant solution, and finally add hydrazine hydrate and stir slowly. Drying under high temperature, and finally obtain nanocomposite powder composed of silver, zinc and copper and other components, and then after standing, separating, washing, and redispersing into the solvent to obtain a composite sol with a particle size of 10-100nm, the particle size of the sol is uniform , the raw material is easy to obtain, the process is simple, the cost is low, the industrial production is easy to realize, and the application is very extensive.
Owner:北京首纳东方科技有限公司 +1
Synthesis of 2-(2-aminoethoxy) ethanol
ActiveUS20210040029A1Organic compound preparationSulfonic acid esters preparationImideTosylhydrazone
A method for synthesizing 2-(2-aminoethoxy) ethanol, including the steps of producing 2-(2-phthalimidoethoxy) ethanol by reacting 5-tosyloxy-3-oxapentanol with potassium phthalate and converting the 2-(2-phthalimidoethoxy) ethanol to the 2-(2-aminoethoxy) ethanol by reacting the 2-(2-phthalimidoethoxy) ethanol with hydrazine monohydrate. Reacting the 2-(2-phthalimidoethoxy) ethanol with the hydrazine monohydrate may include forming a final mixture by adding the hydrazine monohydrate to a solution of 2-(2-phthalimidoethoxy) ethanol, refluxing the final mixture in a nitrogen atmosphere, extracting a second organic phase containing the 2-(2-aminoethoxy) ethanol from the final mixture using a second portion of chloroform, and purifying the 2-(2-aminoethoxy) ethanol from the second organic phase.
Owner:SAFAEI GHOMI JAVAD +1
Surface modified particle diameter mixed silver powder and preparation method thereof
Owner:ZHEJIANG GUANGDA ELECTRONICS TECH
Asymmetric phosphorus oxide pyridine triazine derivative and synthesis method thereof
PendingCN114560889AStable structure and performanceEasy extractionGroup 5/15 element organic compoundsRecycling and recovery technologiesOrganic synthesisCamphoroquinone
The invention relates to the technical field of organic synthesis, and discloses an asymmetric phosphorus oxide pyridine triazine derivative and a synthesis method thereof.The asymmetric phosphorus oxide pyridine triazine derivative has the structural formula shown in the formula I. The synthesis method comprises the steps that 1, halogenated-2-cyanopyridine and hydrazine monohydrate react to obtain an intermediate product A; step 2, dropwise adding the intermediate product A into a camphorquinone solution, carrying out a reaction to obtain a filtrate, carrying out spin-drying, and purifying to obtain an intermediate product B; and 3, dissolving the intermediate product B and phosphorus oxide in a solution, and reacting to obtain the derivative, the derivative has the advantages of stable performance, strong acid hydrolysis resistance, high extraction capacity, high extraction rate and the like, and has a good application prospect in the field of co-extraction separation of trivalent lanthanide series and actinide series in nuclear industry waste liquid, especially high-level liquid waste.
Owner:ZHEJIANG UNIV
Preparation method of Cu (2+) color indicator based on rhodamine B-2-formaldehyde thiophene derivative
InactiveCN103087071BImprove anti-interference abilityWide pH rangeOrganic chemistryMaterial analysis by observing effect on chemical indicatorAnti jammingHydrazine compound
The invention relates to a copper ion detection agent, and particularly relates to a preparation method of a Cu(2+) color indicator based on rhodamine B-2-formaldehyde thiophene derivative. The method comprises the step of firstly, carrying out condensation reaction on rhodamine B and hydrazine monohydrate to obtain hydrazine rhodamine B, wherein the hydrazine rhodamine B reacts with 2-thiophenecarboxaldehyde to obtain the rhodamine B-2-formaldehyde thiophene derivative; and water-ethanol mixed solution based on the rhodamine B-2-formaldehyde thiophene derivative can be used as the Cu(2+) color indicator. The preparation method can be used for rapidly analyzing an efficient color indicator with special Cu (2+) content in a water sample, is strong in anti-jamming capability on the other metal ions (Zn(2+), Cr(3+), Fe(3+), Cd(2+), Mn(2+), Hg(2+), Fe(2+), Pb(2+), Ba(2+) and Ag(+)), and is the efficient Cu(2+) color indicator; the applicable pH range is from faintly acid to neutral property; the response time of the Cu2(+) color indicator on the Cu2(+) is 3 minutes; and the lowest detection limit is 1.7*10(-7)mol / L. The preparation method has the advantages of being simple in synthetic process, low in cost, simple and convenient to operate, good in selectivity, high in sensitivity, high in response speed, low in detection limit, wide in application prospect and the like, can be used for real-time and rapid measurement of complicated samples, and also can be used for semi-quantitative detection of environmental sample tiny / trace Cu(2+) from different sources.
Owner:TONGJI UNIV
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