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84results about How to "Low thermal decomposition temperature" patented technology
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Preparation method of phosphate modified acrylate emulsion
The invention relates to a preparation method of phosphate modified acrylate emulsion. The preparation method not only has relatively low cost, but also can effectively improve the flame retardation property of polyacrylate emulsion. The preparation method of phosphate modified acrylate emulsion comprises the following steps of: (1) primary polymerization: pre-emulsifying 10-20 parts of methyl methacrylate, 2-3 parts of methacrylic acid, 1-2 parts of acrylonitrile and 10-15 parts of styrene, then performing primary emulsion polymerization, and adjusting the pH value to obtain the primary polymerized emulsion; and (2) secondary polymerization: pre-emulsifying 30-45 parts of hydroxyl methacrylate substance, then adding the pre-emulsified product and 5-10 parts of phosphate monomer into the primary polymerized solution, and performing secondary emulsion polymerization to obtain the phosphate modified acrylate emulsion with a core-shell structure, wherein the phosphate monomer is trichloroethyl phosphate, trichloropropyl phosphate or n-ethyl phosphate; the molecular weight of polymer in the obtained phosphate modified acrylate emulsion is 2000-3000; and the particle size is 0.2-0.6 mum.
Owner:JIANGSU SOBUTE NEW MATERIALS
Water-based adhesive and preparation method and applications thereof
InactiveCN101717612AHigh solid contentLow impurity contentFixed capacitor dielectricEster polymer adhesivesMethyl methacrylateIon
The invention relates to a water-based adhesive and a preparation method and applications thereof. The water-based adhesive comprises the following components in percentage by weight: 1-8% of acrylic acid or methacrylic acid, 5-20% of methyl methacrylate, 10-40% of acrylic ester, 0.5-5% of compounded emulsifier, 0.1-0.5% of initiator and 40-80% of deionized water. The preparation method comprises the following steps of: A. firstly dissolving the emulsifier in water, and then adding the acrylic acid or the methacrylic acid, the methyl methacrylate and the acrylic ester to the emulsifier solution for preemulsification; B. pouring 1 / 4-1 / 3 of the emulsified liquid in Step A in a reaction kettle, stirring and heating to 65-75 DEG C, adding the initiator solution, and reacting until the solution is transparent; and C. heating the solution in Step B for synthetic reaction, gradually dropping the remaining emulsified liquid to the reaction system, adding the remaining initiator solution after dropping, and adjusting the pH value. The adhesive is applied to MLCC capacitors and has the advantages of low cost, good performance and good environmental friendliness.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
Method for preparing vinyl chloride by hydrochlorinating acetylene through using quaternary phosphonium long-chain ionic liquid as medium
ActiveCN104109076AAvoid local overheatingAvoid catalytic carbon depositionPreparation by halogen halide additionPhosphoniumHydrogen chloride
The invention discloses a method for preparing vinyl chloride by hydrochlorinating acetylene through using a quaternary phosphonium long-chain ionic liquid as a medium. The method comprises the following steps: dissolving a catalyst in a quaternary phosphonium long-chain anion functional ionic liquid medium to prepare a catalysis system, activating the catalysis system by introducing hydrogen chloride in advance, and introducing acetylene and hydrogen chloride to carry out a reaction. The method using the ionic liquid as the reaction medium and a mercury-free compound as the catalyst realizes the green and environmentally-friendly liquid phase reaction of acetylene hydrochlorination, has a very good catalysis efficiency, and makes the acetylene conversion rate reach 80-98% and the vinyl chloride selectivity reach above 99.5%.
Owner:ZHEJIANG UNIV
Method for producing metal particle dispersion, conductive ink using metal particle dispersion produced by such method, and conductive coating film
InactiveUS7981327B2Fast progressInhibit aggregationMaterial nanotechnologyLayered productsLiquid mediumConductive coating
Disclosed is a method for producing a metal particle dispersion wherein a metal compound is reduced by using carbodihydrazide represented by the formula (1) below or a polybasic acid polyhydrazide represented by the formula (2) below (wherein R represents an n-valent polybasic acid residue) in a liquid medium. By reducing the metal compound in the presence of a compound having a function preventing discoloration of the metal, there can be obtained a metal particle dispersion having excellent discoloration preventing properties. Metal particles produced by such methods have a uniform particle diameter and are excellent in dispersion stability. By using a conductive resin composition or conductive ink containing a metal particle dispersion obtained by such production methods, there can be formed a conductive coating film, such as a conductive circuit or an electromagnetic layer, having good characteristics.
Owner:TOYO INK SC HOLD CO LTD
Alumina thin film and preparation method and application thereof
ActiveCN102787309ALow thermal decomposition temperatureLow heat treatment temperatureTransistorSolid/suspension decomposition chemical coatingIonDissolution reaction
The invention discloses a preparation method of an alumina thin film in the field of a thin film transistor. The preparation method comprises the following steps of: preparing aluminium precursor solution, i.e., dissolving a precursor material containing aluminium metal ions and a stabilizer in solution and sufficiently stirring to sufficiently dissolve the precursor material and the stabilizer to obtain the precursor solution; and preparing the alumina thin film, i.e., coating the prepared reaction solution on a coating surface to form a film and carrying out heat treatment program to obtain the alumina thin film. The invention also relates to the alumina thin film prepared by the preparation method and application of the alumina thin film in the transistor. The application comprises the thin film transistor of the alumina thin film and a preparation method of the thin film transistor. According to the preparation method of the alumina thin film, which is disclosed by the invention, by adding a right amount of stabilizer for stabilizing an alumina precursor material, a metal organic complex is formed by the precursor material of aluminium through the coordination dissolution reaction; the complex can be well dissolved in the solution and has low thermal decomposition temperature; and the heat treatment temperature in the preparing process is reduced.
Owner:TSINGHUA UNIV +2
Process for preparing calcined dolomite from magnesium chloride of chloride type by-product of potassium-extracting from salt lake
The invention provides a method for preparing a composed calcined dolomite by taking the byproduct of brine ( a saturated liquor which is mainly magnesium chloride ) after potassium extraction or the bischofite separated out from the brine by naturally evaporating as the materials to react with excess lime to prepare the floccule mixture of magnesium hydrate and calcium hydroxide; then the mixture is calcined and dehydrated under the temperature of 400 to 1200 DEG C after the mixture is deposited, filtered, washed, dried and cracked. The materials of the invention are easily obtained and cheap; the production process is simply and easily controlled; no carbon dioxide is discharged; besides, the invention basically has no corrosion to a device. The mol ratio of MgO to CaO in the composed calcined dolomite is within the range of 1:0.8 to 1:1.2; the activity of water is 25 to 36 percent; the composed calcined dolomite is applicable for the areas rich in the resource of magnesium chloride to use a Pidgeon process to produce the metal of magnesium.
Owner:QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
Tobacco flavor and preparation method thereof
ActiveCN112553004ALong-lasting and stable aromaRich aromaTobacco preparationTobacco treatmentThermal decompositionBiotechnology
The invention provides a tobacco flavor and a preparation method thereof, the tobacco flavor comprises solid acid and glucoside, and the weight ratio of the solid acid to the glucoside is 1: 5-1: 1000. Furthermore, the invention also provides application of the tobacco flavor as a flavor substance in low-temperature cigarettes. In the tobacco flavor, the solid acid is used as a catalyst, so that the thermal decomposition temperature of glycoside substances can be obviously reduced, the tobacco flavor is particularly suitable for low-temperature cigarettes, the flavor substances are not volatilized or lost in a normal-temperature state, and even if the low-temperature cigarettes are stored for a long time, the aroma is still lasting and stable during smoking.
Owner:HUBEI CHINA TOBACCO IND
Special polyvinyl alcohol thin film for fruit and vegetable packaging
InactiveCN108794954AExtended shelf lifeGood antibacterial and mildew resistanceSilicon dioxideGlutamine transaminase
The invention discloses a special polyvinyl alcohol thin film for fruit and vegetable packaging. The special polyvinyl alcohol thin film comprises the following raw materials in part by weight: 100 parts of polyvinyl alcohol, 10-25 parts of starch, 5-13 parts of gelatin, 2-4.8 parts of montmorillonite, 1-3 parts of activated carbon, 0.5-2 parts of zeolite, 3-5.6 parts of modified alumina, 0.5-2 parts of nanometer silicon dioxide, 0.3-2 parts of chitosan quaternary ammonium salt, 2-8 parts of plant extract, 1-5 parts of spirulina, 0.01-0.09 part of antioxidant, 2-8 parts of retinervus luffae fructus, 2-8 parts of retinervus luffae fructus, 0.3-0.8 part of plant essential oil, 0.2-0.85 part of glutamine transaminase and 0.01-0.1 part of antibacterial peptide . The special polyvinyl alcohol thin film for fruit and vegetable packaging, disclosed by the invention, is excellent in antibacterial property, high in strength, low in moisture permeability and excellent in heat and weather resistance, is used for keeping fruits and vegetables fresh, is good in antibacterial and anti-mildew properties and can prolong the shelf lives of the fruits and the vegetables.
Owner:WUHU JINCHENG AGRI TECH CO LTD
Method for preparing environment-friendly type casting adhesive agent
The invention discloses a preparation method of an environment-friendly casting binder, which relates to an improvement of a casting binder, and provides the preparation method of an environment-friendly casting binder that does not discharge noxious and harmful gases in the producing and using process. The preparation method of the environment-friendly casting binder adopts the technical proposal which comprises animal glue, fatty acid, alcohol, an anti-gelling agent and a catalyst with the content of each component by weight is: 30 to 60 units of animal glue, 20 to 40 units of fatty acid (or C12-C18 organic acid), 10 to 20 units of alcohol, 10 to 20 units of anti-gelling agent, 1 to 2 units of mineral acid catalyst and the remaining of water.
Owner:SHENYANG POLYTECHNIC UNIV
Preparation method for noble metal modified titanium anode materials
InactiveCN102505127AReduce consumptionImprove activation etching efficiencyLiquid/solution decomposition chemical coatingElectrodesOrganic solventExposed point
The invention relates to a preparation method for noble metal modified titanium anode materials, belonging to the technical field of high-performance electrode materials. The preparation method for noble metal modified titanium anode materials comprises the following steps of: taking noble metal organic complex as a precursor; atomizing the precursor into atomizing flow after being dissolved in organic solvent; depositing the precursor on the surface of a titanium sheet; thermally decomposing and cooling under the existence of inertia gas; repeating three continuous steps of depositing, thermally decomposing and cooling for at least once; and carrying out aftertreatment, so as to obtain the noble metal modified titanium anode materials. The titanium anode prepared by the method has high yield and less surface exposed point; the noble metal and pure titanium base material have high binding force; and the whole coating has better homogeneity and uniformity. Experiments show that the titanium anode prepared by the method has better electrochemical performance and long service life.
Owner:文广 +4
Preparation method of porous carbon material
ActiveCN104229769AImprove performanceHigh dechlorination efficiencyPorous carbonChlorinated polyvinyl chloride
The invention discloses a preparation method of a porous carbon material. The preparation method comprises the following steps: stirring and mixing chlorinated polyvinyl chloride, alkali metal hydroxides and methacrylate copolymers in parts by weight, and extruding at the temperature of 190-210 DEG C to obtain a granulating material; then increasing the temperature of the granulating material from 25 DEG C to 800-900 DEG C in an inert gas atmosphere at two-stage heating rate for carbonization, and then reducing the temperature to 25 DEG C at the cooling rate of 20-40 DEG C / min to obtain a carbonized material; then immersing the carbonized material into an aromatic substance for 2-4 hours, then increasing the temperature from 25 DEG C to 900-1000 DEG C in the inert gas atmosphere at the two-stage heating rate, keeping constant temperature for 3-4 hours, and then reducing the temperature to 25 DEG C at the cooling rate of 15-30 DEG C / min to obtain the porous carbon material. The preparation method disclosed by the invention has the advantages of simple process, environmental protection, easiness for industrialization and stability in product property.
Owner:JUHUA GROUP TECH CENT
Composite oxidant for fireworks and crackers and preparation method thereof
InactiveCN101100410ALow hygroscopicityImprove safety performanceAlkali metal salt explosive compositionsWater contentChemistry
A composite oxidant for firework and its production are disclosed. The composite oxidant consists of potassium perchlorate 63-68 wt%, potassium nitrate 29-34 wt% and cerium oxide 3-8 wt%. The process is carried out by drying to make water content less than 0.5%, screening and mixing to obtain final product. It's simple, safe and convenient and has less accessibility and better firework effect.
Owner:NANJING UNIV OF SCI & TECH
Method for recycling polyvinyl chloride wood-plastic composites waste
ActiveCN104211041AImprove performanceLow costSolid waste disposalFurniture waste recoveryPorous carbonCarbonization
The invention discloses a method for recycling a polyvinyl chloride wood-plastic composites waste. The method includes following steps: (1) according to certain weight parts, mixing a crushed polyvinyl chloride wood-plastic composites waste, a carbonate or bicarbonate of alkali metals, and a plasticizer with stirring under a certain rotate speed, and performing extrusion at 170-200 DEG C to obtain a granulated material; (2) under an inert gas atmosphere, increasing a temperature from 25 DEG C to 700-750 DEG C with a two-stage temperature-increasing speed for performing carbonization, and decreasing the temperature to 25 DEG C with a temperature decreasing speed of 5-10 (DEG C) / min to obtain a carbonized material; soaking the carbonized material in an aromatic compound for 0.1-1 hour, taking out the carbonized material, under the inert gas atmosphere, increasing a temperature from 25 DEG C to 850-950 DEG C with a two-stage temperature-increasing speed, maintaining the temperature for 1-2 hours, and decreasing the temperature to 25 DEG C with a temperature decreasing speed of 15-20 (DEG C) / min to obtain a porous carbon material. The method is simple in technology, is green and environmental-protective, is low in cost and is good in economic benefit.
Owner:JUHUA GROUP TECH CENT
Double in-situ synthesis method of temperature-responsive nano silver composite hydrogel
The invention relates to a double in-situ synthesis method of temperature-responsive nano silver composite hydrogel. By adopting an ultraviolet radiation method, under a condition without an initiator and a reducing agent, with dimethylaminoethyl methacrylate and 2-acrylamide-2-methylpropanesulfonic acid as monomers, N,N'-methylene bisacrylamide as a cross-linking agent, polyethylene glycol 400 as a pore forming agent, and silver nitrate as a metal source, and under a nitrogen atmosphere, the temperature-responsive nano Ag / P(DMAEMA-g-AMPS) composite hydrogel is synthesized. The prepared nano silver composite hydrogel has uniform dispersed nano silver particles and good chemical cross-linking stability, allows the swelling degree to be increased by 294.8 compared with that of pure water gel, and improves water absorbency and water retention of the hydrogel; the composite hydrogel allows temperature responsiveness to be enhanced, thereby being beneficial for medical drug release and other applications; and the composite hydrogel allows the thermal decomposition temperature to be decreased by 78 DEG C compared with that of pure hydrogel, thereby being beneficial for polymer waste post-processing.
Owner:ANHUI UNIV OF SCI & TECH
Loaded type catalyst for preparing elemental phosphorus and preparation method thereof
InactiveCN101524648AHigh strengthHigh hardnessCatalyst activation/preparationPhosphorus preparationPotassium borohydrideDecomposition
The invention discloses a loaded type catalyst for catalyzing and decomposing phosphine to prepare elemental phosphorus, which takes a carbon nano tube as carrier and forms Co-P / CNTs amorphous alloy together with Co and P. A method for preparing the loaded type catalyst comprises: water-soluble cobalt salt, sodium citrate, sodium hypophosphite and ammonium sulphate are dissolved in de-ionized water and then added with the carbon nano tube which is purified and functionalized, and is steeped by the cobalt salt; the pH of the reaction liquid is adjusted to be about 9 by using ammonia water; under the condition of 80-90 DEG C, the reaction liquid is added with potassium borohydride for initiation and then fully stirred, so that black precipitate is produced in the reaction; after being separated, the precipitate is respectively washed by the de-ionized water and absolute ethyl alcohol, and then put into the absolute ethyl alcohol to be saved. The invention has the advantages that the carbon nano tube (CNTs) is adopted as the carrier to prepare the Co-P / CNTs amorphous alloy which is taken as catalyst for pyrolyzing the phosphine, decomposition temperature is low, and the catalytic activity and the thermal stability are good.
Owner:NANKAI UNIV
Preparation method of flame-retardant super-fine wool fabric
InactiveCN109467615AReduce the temperaturePromote charcoalHeat resistant fibresAnimal fibresFiberWater vapor
The invention discloses a preparation method of flame-retardant super-fine wool fabric. The preparation method comprises the following three steps: oxidizing sodium alginate, finishing fabric with oxidized sodium alginate and performing ion exchange. In the preparation method of the flame-retardant super-fine wool fabric, multi-aldehyde sodium alginate is adopted as a finishing agent for film formation on the surfaces of fibers, and the sodium alginate covered on the surfaces of the fibers are used for isolating air and heat, so that char formation is promoted, water vapor is vaporized by absorption of heat, and the thermal decomposition temperature is lowered accordingly; in addition, the step that the sodium alginate is heated is earlier than the step of decomposition of wool, so that the temperature on the surface of the fabric is lowered while heat is absorbed and the flame retardant effect is achieved finally.
Owner:JIANGSU EAST CHINA TEXTILE PROD TESTING CO LTD
Preparation method of modified activated carbon material for capacitor
ActiveCN111320173AEasy to prepareSuitable for large-scale productionCarbon compoundsHybrid capacitor electrodesCapacitanceO-Phosphoric Acid
The invention discloses a preparation method of a modified activated carbon material for a capacitor. The preparation method comprises the following steps: (1) polishing, drying and crushing a carbonsource; (2) activating the raw materials through a phosphoric acid solution to obtain a primary activated product; (3) mixing the precursor powder with the primary activation product, and activating with potassium hydroxide to obtain a secondary activation product; and (4) adding the secondary activation product into a saturated lead nitrate solution, carrying out ultrasonic dispersion, stirring and performing vacuum filtration to obtain a filter cake, and carrying out heat treatment to obtain the material. The preparation method of the activated carbon is simple; the preparation method is simple in process, wide in raw material source and suitable for large-scale production, a secondary activation process is adopted in the preparation process, precursor powder with high content of heteroatoms such as nitrogen and oxygen is added into the activated carbon, the specific surface area is further increased, micropores are enriched in the surface, the specific capacitance of the material isimproved, and the use performance of the material is enhanced.
Owner:ZHEJIANG FORESTRY ACAD
Preparation method of porous carbon material
The invention discloses a preparation method of a porous carbon material. The preparation method comprises the following steps of blending polyvinylidene chloride, polyvinyl chloride, basic metal oxide and a processing aid, carrying out extrusion molding, carrying out charing and carrying out carbon deposition to obtain the porous carbon material. The preparation method solves the problem that the prior art for preparing a porous carbon material structure only by polyvinylidene chloride produces unstable chlorine atoms, easily produces hole-closing phenomenon and difficultly controls apertures and a specific surface area so that porous carbon material performance and stability are influenced, and also solves the problem that based on the prior art, in a polyvinylidene chloride and polyvinyl chloride thermolysis dechlorination process, poisonous and harmful HCl gas is produced, process time is long and energy consumption is high. The preparation method has the advantages of simple processes, environmental friendliness, easy industrialization and stable product performances.
Owner:JUHUA GROUP TECH CENT
Thermosetting alkyl polyol glycidyl ether resin composition and application thereof
ActiveCN106810820AExcellent dielectric propertiesLow dielectric propertiesSynthetic resin layered productsCircuit susbtrate materialsGlycidyl ethersPrinted circuit board
The invention provides a thermosetting alkyl polyol glycidyl ether resin composition and application thereof. The resin composition is prepared by using epoxy resin as a main resin component, wherein the epoxy resin comprises alkyl polyol glycidyl ether which is 50-100 percent of mass of the main resin component. The composition is used for preparing prepregs, laminated boards, printed circuit boards and the like. Since the epoxy resin having an alkyl polyol glycidyl ether molecular structure is adopted as a main resin component, a prepared laminated board has relatively good thermal performance and adhesive performance, and has the advantages of low dielectric performance, low preparation cost, simple method and wide application prospect.
Owner:GUANGDONG SHENGYI SCI TECH
Inflaming retarding aerosis polyamide arc extinguishing composite material
The invention discloses an inflaming retarding aerosis polyamide arc extinguishing composite material which is prepared from the following raw materials in percentage by weight: 20.0-85.0% of polyamide, 5.0-25.0% of polyamide prepolymer, 5.0-15.0% of arc-quenching metallic compound, 0.0-15.0% of arc-quenching water absorbing compound, 10.0-20.0% of arc-quenching aerosis inflaming retarding compound, 0.5-2.0% of an aerosis accelerator and 0.0-5.0% of a processing aid. The inflaming retarding aerosis polyamide arc extinguishing composite material not only has a good inflaming retarding property but also can generate gas to assist arc extinction, has an excellent mechanical property, and is especially suitable for preparing miniature circuit breakers. The invention also provides a method for preparing the inflaming retarding aerosis polyamide arc extinguishing composite material. The method can be realized by adopting an existing twin-screw extruder; the preparation is simple and liable to industrial mass production, with broad application prospects.
Owner:中广核俊尔(浙江)新材料有限公司 +2
Preparation method of arc extinction material for high voltage fuse
ActiveCN108538690ALow thermal conductivityEasily brokenFuse device manufacturePolyamidePhosphoric acid
The invention discloses a preparation method of an arc extinction material for a high voltage fuse, and belongs to the technical field of preparation of arc extinction materials. Prepared quartz sandis amorphous silica prepared from diatomite through infiltration of phosphoric acid and urea and chemical purification, the synthesized arc extinction material has low impurity content and pure composition, microcrystalline cellulose is produced in the quartz sand under the action of infiltration and can integrate functions of filling, thickening and emulsifying, nylon can produce flame-retardantgas polyamide in high-voltage arc, through composition of the components in specific quantities, the components can affect mutually, act jointly and produce a synergistic effect, so that the arc extinction material based on the flame-retardant gas polyamide produces obviously increased gas after being subjected to arc, gas pressure is increased obviously, and the material is decomposed more easilyin presence of high-temperature arc to produce gas and further has high flame retardance and broad application prospect.
Owner:广西振钢再生资源有限公司
Method for preparing superhydrophobic oxidant based on lotus effect
ActiveCN109206284AAchieve anti-moisture absorption performanceEfficient anti-moisture performanceExplosive working-up apparatusNon-explosive/non-thermic compositionsMoisture absorptionSolvent
The invention discloses a method for preparing a superhydrophobic oxidant based on lotus effect. The method comprises the following steps: adding a low-surface-energy material into a solvent, then adding oxidant particles, and carrying out stirring, filtering and drying successively; and adding the oxidant particles modified by the low-surface-energy material into a metal salt solution, and carrying out filtering and drying after a sufficient reaction so as to obtain superhydrophobic oxidant particles. According to the invention, the principles of bionic superhydrophobicity are employed for surface treatment of the oxidant prone to moisture absorption, so the moisture absorption rate of the oxidant is significantly reduced, and in particular, under the conditions of a temperature of 60 DEGC, a relative humidity of 80% and test time of 400 hours, the moisture absorption rate of ADN is lowered by about 53%, and the superhydrophobic oxidant can be placed in the air for 6 months without any agglomeration; and an utilized coating material assists in the realization of moisture absorption prevention performance of the oxidant, and a metal salt in the coating material can significantly reduce the thermal decomposition temperature of the oxidant, which is of important significance to the application of the oxidant to high-burning-rate solid propellants.
Owner:SOUTHWEAT UNIV OF SCI & TECH
A method for preparing zinc oxide nanorods
InactiveCN104310458BLow thermal decomposition temperaturePromotes anisotropic growthMaterial nanotechnologyZinc oxides/hydroxidesSulfate zincAlcohol
Owner:JIUJIANG UNIV
Polycarbonate Prepolymer for Solid Phase Polymerization and Process for Producing Polycarbonate
InactiveUS20080064847A1Quality improvementEfficient productionOrganic-compounds/hydrides/coordination-complexes catalystsArylPolymer science
A polycarbonate prepolymer for solid state polymerization, which is produced by an oxidative carbonylation reaction of an aromatic dihydroxy compound, a monohydric phenol having a boiling point of 330° C. or below, carbon monoxide and oxygen, the polycarbonate prepolymer being characterized by that (a) a ratio of aryl carbonate groups and hydroxyl groups each constituting terminal groups of the prepolymer is from 2:8 to 8:2, and (b) a molecular weight distribution (Mw / Mn) is from 1.1 to 2.1; and a process of producing polycarbonates including a step of solid state-polymerizing the prepolymer so as to increase the molecular weight thereof. According to the present invention, the prepolymer having a controlled molecular weight distribution suitable for solid state polymerization is provided, and a high quality polycarbonate is efficiently produced in environmentally friend manner.
Owner:IDEMITSU KOSAN CO LTD
Process for preparing VO2 nanopowder and its adulterant nanopowder
InactiveCN1125780COvercoming phase transition stressRealize practicalityVanadium oxidesStereochemistry
The present invention relates to VO 2 A preparation method of nano powder and its dopant nano powder. The method uses V 2 o 5 Reduction of VOCl 2 solution, followed by VOCl 2 The solution is made into vanadyl (IV) basic ammonium carbonate precursor, and the precursor is thermally decomposed to obtain VO 2 Nano powder and its dopant nano powder. The invention has the advantages of simple process, low energy consumption, low investment, low cost, and is convenient for large-scale production, and the nano-ceramic prepared by using the obtained nano-powder has high strength and good thermoelectric performance.
Owner:SUN YAT SEN UNIV
Preparation method for perfluoroalkyl iodide with low carbon number
ActiveCN102464569AReduce generationLow thermal decomposition temperatureHalogenated hydrocarbon preparationCarbon numberIodide
The invention discloses a preparation method for perfluoroalkyl iodide with low carbon number. According to the method, under the effect of an anhydrous perfluorocarboxylic silver salt RfCO2Ag and / or an anhydrous perfluorocarboxylic copper salt (RfCO2)2Cu, an anhydrous perfluorocarboxylic acid salt (RfCO2)nM and elementary iodine are subjected to a thermal decomposition reaction to generate the perfluoroalkyl iodide, wherein Rf is independently selected from perfluoroalkyl having carbon atoms of 1-6, n is selected from an integer of 1-6, M is a IA group metal element, a IIA group metal element, a IVA group metal element, a IB group metal element or a IIB group metal element metal. According to the present invention, the preparation method has characteristics of no requirement of the solvent, simple operation, mild reaction, rapid reaction speed, high yield, low cost, high selectivity and environmental protection, and can be used for the industrial production; the prepared perfluoroalkyl iodide can be used for production of fluorine-containing finishing agents, fluorine-containing surfactants and other fluorine-containing fine chemical products.
Owner:SINOCHEM LANTIAN +1
Preparation method for perfluoroalkyl iodide with low carbon number
ActiveCN102464569BReduce generationLow thermal decomposition temperatureHalogenated hydrocarbon preparationCarbon numberIodide
The invention discloses a preparation method for perfluoroalkyl iodide with low carbon number. According to the method, under the effect of an anhydrous perfluorocarboxylic silver salt RfCO2Ag and / or an anhydrous perfluorocarboxylic copper salt (RfCO2)2Cu, an anhydrous perfluorocarboxylic acid salt (RfCO2)nM and elementary iodine are subjected to a thermal decomposition reaction to generate the perfluoroalkyl iodide, wherein Rf is independently selected from perfluoroalkyl having carbon atoms of 1-6, n is selected from an integer of 1-6, M is a IA group metal element, a IIA group metal element, a IVA group metal element, a IB group metal element or a IIB group metal element metal. According to the present invention, the preparation method has characteristics of no requirement of the solvent, simple operation, mild reaction, rapid reaction speed, high yield, low cost, high selectivity and environmental protection, and can be used for the industrial production; the prepared perfluoroalkyl iodide can be used for production of fluorine-containing finishing agents, fluorine-containing surfactants and other fluorine-containing fine chemical products.
Owner:SINOCHEM LANTIAN +1
Method for recycling lyvinylidene chloride waste
The invention discloses a method for recycling lyvinylidene chloride waste. The method comprises the following steps: (a) proportioning pulverized lyvinylidene chloride waste, alkaline metal hydroxide and a plasticizer in parts by weight and then stirring and mixing, and extruding and pelletizing at a temperature of 170-200 DEG C; (b) heating the pelletized material in an inert gas atmosphere at two different heating rates to 700-800 DEG C from 25 DEG C in two steps, and cooling to 25 DEG C at the rate of 10-20 DEG C / min to obtain carbonized material; and (c) immersing the carbonized materials into an alcohol solution of phenolic resin for 1-2 hours, and heating the carbonized material to 850-900 DEG C from 25 DEG C at two different heating rates in two steps, and cooling to 25 DEG C at the rate of 5-10 DEG C / min to obtain a porous carbon material. The method is simple in process, friendly to the environment, low in cost and good in economic benefits.
Owner:JUHUA GROUP TECH CENT
Preparation method for titanium plate loaded palladium nanoparticle catalyst
InactiveCN106816605AUniform sizeEvenly dispersedFinal product manufactureCell electrodesNano catalystAlcohol
The invention discloses a preparation method of a titanium plate loaded palladium nanoparticle catalyst. A titanium plate is taken as a carrier, palladium chloride is taken as a precursor, gel is formed by adding oleic acid or oleate and is then evenly sprayed on the titanium plate, and the titanium plate loaded palladium nanoparticle catalyst is obtained by insulation treatment under the 180-350DEG C gas protection for 0.5-2 hours. Compared with a traditional thermal decomposition method, the preparation method has the advantages that thermal decomposition temperature can be remarkably reduced, obtained Pd particles are uniform in particle, the average particle diameter is smaller than 10nm, the Pd particles can be uniformly dispersed on the titanium plate, high catalytic activity on alcohol fuels of ethyl alcohol, methyl alcohol and the like is achieved, raw materials are easy to obtain, simpleness in operation method is achieved, and requirements of industrialization production can be reached.
Owner:FUZHOU UNIV
Ionic liquid surfactant containing ether functional groups and preparation method thereof
InactiveCN103657516AReduce surface tensionWell formedOrganic chemistryTransportation and packagingSolubilityWater soluble
The invention discloses an ionic liquid surfactant containing ether functional groups and a preparation method thereof. The invention adopts the technical scheme as follows: the ionic liquid surfactant containing the ether functional groups is prepared through quaterisation reaction of chloromethyl n-alkyl ether and N-methylimidazole, and adopts the following structure (shown in the specification), wherein n is between 8 and 14. The invention further discloses a preparation method for the ionic liquid surfactant containing the ether functional groups. The ionic liquid surfactant containing ether functional groups, disclosed by the invention, not only has certain characteristics of ionic liquid, but also has amphipathy: 1, the ionic liquid surfactant containing ether functional groups is easier to adsorb on the surface of gas / liquid, so that surface tension of water is reduced effectively; 2, the Krafft point being less than 5 DEG C is relatively low; 3, micelle is formed easily; 4, thermal decomposition temperature is low; 5, water solubility is relatively high, and the ionic liquid surfactant containing ether functional groups is unstable in an alkaline solution.
Owner:HENAN NORMAL UNIV
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