105results about How to "Gentle preparation process" patented technology

The invention discloses a preparation method of a graphene/stannic oxide quantum dot composite electrode material for a lithium ion battery. In the sample preparation process, that graphene-supported stannic oxide quantum dots are synthesized under relatively mild experiment conditions by utilizing a wet chemical method, and urea is adopted as a reducing agent to reduce graphite oxide, so that the preparation method has the advantages of simple and controllable reaction conditions and low production cost; by introducing graphene, not only can the conductivity of the composite material be improved but also volume change in the stannic oxide charge-discharge process can be effectively buffered; therefore the composite material shows good cycling stability.

The invention discloses a preparation method of a cellulose grafted epoxy vegetable fat anionic polymeric surfactant. The preparation method comprises the following sequentially-connected steps: fully dissolving a cellulose material in a solvent, stirring, heating to 30-70 DEG C, adding epoxy vegetable fat, dropwise adding an initiator solution, reacting for 1-2 h under the condition of heat preservation, and removing the solvent, so that a cellulose grafted epoxy vegetable fat product is obtained; hydrolyzing the cellulose grafted epoxy vegetable fat product under the action of a catalyst, and purifying the obtained object, so that a cellulose grafted epoxy vegetable fatty acid is obtained; and dispersing the cellulose grafted epoxy vegetable fatty acid in water, adjusting the pH value to 7-11, and carrying out distillated dehydration on the obtained product, so that the cellulose grafted epoxy vegetable fat anionic polymeric surfactant is obtained. The preparation method is wide in raw material sources and low in price, the prepared surfactant is biodegradable, mild in synthetic conditions and simple in preparation process, has less pollution to the environment, and accords with the concept of sustainable development.

The invention relates to the technical field of nanomaterials, and in particular, relates to a method for preparing a metal oxide multistage structure by an MOF-derived bimetallic oxide template; theMOF-derived bimetallic oxide template is treated by an alkali to obtain the metal oxide multistage structure; M is set as a metal in the metal oxide multistage structure, the MOF-derived bimetallic oxide template is MMoO4-MOF-derived bimetallic oxide, and the metal oxide multistage structure is MxOy. The preparation process is simple, mild and universal, has no special requirements for equipment,does not use surfactants, and can be industrialized and produced in large scale. The metal oxide multi-stage structure prepared by the method is uniform in size, stable in structure and uniform in component distribution.

The invention discloses modified polyacrylonitrile for treating wastewater containing antimony and a preparation method thereof and relates to the field of adsorbents. The preparation method includesthe following steps: S1) immersing a polyacrylonitrile substrate in an aqueous solution of hydroxylamine hydrochloride, adding anhydrous sodium carbonate and stirring; S2) after the anhydrous sodium carbonate is completely dissolved, heating a mixed solution in the step S1) in a water bath to start reaction and conducting amidoximation on the polyacrylonitrile substrate in situ; conducting the reaction in the step S2) for 4-12 hours, taking a product out, immersing and washing the product with deionized water, drying the washed product in an oven and vacuum-dehydrating the dried product; S4) grinding the product obtained in the step S3). A modified polyacrylonitrile particle adsorbent prepared has the following advantage that raw materials can be derived from discarded PAN fiber filamentsand rags; the preparation method is simple and the process is mild; the adsorption capacity to the antimony is high and the maximum adsorption amount is large; the desorption effect is good, and the modified polyacrylonitrile can be recycled for many times.

The invention discloses a preparation method of 1,1,1,3,3,3-hexafluoroisopropyl methyl ether. In the preparation method, hexafluoroisopropyl alcohol and halogenated methane are taken as raw materials to synthesize the 1,1,1,3,3,3-hexafluoroisopropyl methyl ether under the action of a base catalyst, wherein, the halogenated methane has the following general formula: CH3X, wherein, X is chosen from Cl, Br or I. The preparation method has the advantages of available raw materials and mild preparation process, and is simple in operation; and the obtained 1,1,1,3,3,3-hexafluoroisopropyl methyl ether can be taken as an intermediate to synthesize the methyl fluoride-1,1,1,3,3,3- hexafluoroisopropyl ether.

The invention discloses a preparation method of an ammonia removal material. The preparation method comprises the steps of: uniformly mixing NaY molecular sieves, ammonia removal effective constituents and a lubricating agent, then adding a binder and deionized water for kneading, carrying out extrusion forming, and drying to obtain the ammonia removal material, wherein the weight ratio of the NaY molecular sieves, the ammonia removal effective constituents and the lubricating agent is 1:0.2-0.7:0.02-0.15:0.1-0.7. The ammonia removal material has the advantages of being mild in a preparation technology, efficient and economic, having high repeatability and high strength, resisting high temperature and being suitable for removal of ammonia gas in industrial exhaust gas, sewage treatment plants and interior of rooms. The ammonia removal material provided by the invention is safe, non-toxic and low in cost. The invention provides an effective solution for ammonia pollution problem.

A process for preparing the 2,3,4-trimethoxyphenyl formaldehyde as the intermediate of medicine includes the methylating reaction between 2,3,4-trihydroxyphenyl formaldehyde, dimethyl sulfate, quaternary ammonium salt and sodium hydroxide at 50-70 deg.C, laying aside for layering, taking the upper oily layer, water washing, vacuum distilling, cooling and crystallizing. Its advantages are high output rate and high purity.

The invention discloses spherical porous lithium manganate and a preparation method and application thereof. The method comprises the following steps that 1, a manganese source and an organic ligand are added into a solvent according to a set ratio, and a mixture is mixed evenly for reaction to obtain an organic compound of manganese, wherein the organic ligand is one or a mixture of at least twoof trimesic acid, trimellitic acid, terephthalic acid, isophthalic acid, benzoic acid, methylimidazole and polyvinylpyrrolidone; 2, after the separated dried organic compound of the manganese and a lithium source are mixed evenly, calcination is conducted to obtain the spherical porous lithium manganate. A preparation technology of the lithium manganate is mild, environmentally friendly, controllable and suitable for large-scale production, and raw material kinds of the manganese source and the lithium source are numerous.

The invention discloses a preparation method for a bismuth titanate film layer on the basis of micro-arc oxidation technology. The preparation method comprises the following steps: a bismuth sheet and a platinum sheet which are the same in size are respectively used as an anode and a cathode; the bismuth sheet is burnished with several pieces of sand paper with different meshes and polished with a polishing paste, and the cleaning and oil removal of the bismuth sheet are performed sequentially via alcohol and acetone for standby; electrolyte with titanium concentration of 0.01-0.10 mol/L is prepared; the bismuth sheet keeps a distance of 1-3 cm from the platinum sheet, the bismuth sheet and the platinum sheet are vertically immersed into the electrolyte in a depth of 2-4 cm, magnetic agitation is started, and 1-5A constant current is electrified for 5-10 min; electric sparks are continuously generated on the surface of the bismuth sheet, a deposition layer is synchronously generated, and the bismuth sheet with the deposition layer is flushed with ion water and then dried at a temperature of 60 DEG C for 2 h, as a result, a bismuth titanate film layer is obtained. The bismuth titanate film layer preparation method is mild in synthesis conditions, can be completed under the conditions of normal temperature and normal pressure, and is quick in reaction speed and simple in operation steps; used bismuth is an environmental-friendly raw material, the process is safe, and no hazardous substance is leaked and discharged, so that environmental protection is facilitated.

The invention belongs to the field of pharmaceutical chemicals, provides a preparation method of deferasirox which is an iron-overloaded medicament and particularly provides a method for preparing deferasirox mainly from salicyloyl chloride, o-benzyloxy cyanophenyl, p-hydrazinobenzoic acid (or hydrochlorides thereof) under mild conditions. The method for preparing the deferasirox is mild in condition and simple to operate; the deferasirox product is high in purity.

The invention relates to a preparation method of light/biological dual-degradation high-water-absorption resin based on natural polymer. According to the method, with cyclohexane as the solvent, a Span-series surface active agent as the dispersing agent, potassium persulfate as the initiator and N,N-methylenebis acrylamide as the crosslinking agent, by means of a reverse-phase suspension polymerization method, starch or carboxymethylcellulose or chitosan or other natural polymer reacts with acrylic acid and acrylamide monomer to prepare the light/biological dual-degradation high-water-absorption resin. According to the high-water-absorption resin, with natural polymer as the biological degradation source and nanometer TiO2 particles as the light degradation source, the nanometer TiO2 particles are evenly distributed in the high-water-absorption resin, the problem that ordinary high-water-absorption resin is difficult to degrade can be effectively solved, and the environment pollution problem is solved.

This invention discloses a method for preparing carnosine analog. The method uses enzyme as the catalyst, and does not need group protection or condensation agent during the reaction, thus having such advantages as simple process, mild reaction conditions, easy operation, complete utilization of resources, no pollution and low cost. The prepared canosine analog has high purity (93.5-95.5%), good quality and strong antioxidative effect, and can be used as antioxidative active substances in medicine, food, health product, cosmetic and feed.

The invention provides a flame-retardant smoke-inhibition light-weight high-strength high-molecular material, and a preparation method thereof. The flame-retardant smoke-inhibition light-weight high-strength high-molecular material comprises following steps: 1, a gelatinizing agent, an oil phase reaction monomer, an oil phase crosslinking agent, an initiator, and a composite flame-retardant smoke-inhibition agent are mixed, and are stirred to be uniform, a dispersion phase is added for emulsification so as to form a uniform fine gel emulsion which is stagnant in upside down position; the gel emulsion is subjected to thermal induced polymerization reaction, and after reaction drying is carried out so as to obtain the flame-retardant smoke-inhibition light-weight high-strength high-molecularmaterial. The flame resistance of the flame-retardant smoke-inhibition light-weight high-strength high-molecular material is capable of reaching V-0 grade or higher only with slightly reduced mechanical performance.

The invention discloses a PVC (Polyvinyl Chloride) flocking composite material and a preparation method thereof. The PVC flocking composite material is prepared from the following components in parts by mass: 70-90 parts of PVC, 20-30 parts of short fibers, 5-15 parts of triphenyl phosphate, 0.2-0.6 part of paraffin, 0.5-1.5 parts of stearate, 5-10 parts of chlorinated paraffin, 1-3 parts of dioctyl phthalate, 5-10 parts of polyvinyl ester, 1-3 parts of epoxy linseed oil, 3-8 parts of light calcium carbonate, 2-5 parts of an antistatic agent, 1-3 parts of an antioxidant, 0.1-1.0 part of a dispersant and 0.1-0.5 part of a de-foaming agent. The PVC flocking composite material has the characteristics of inflaming retarding, water prevention, no deformation, no fading and high strength, is produced by a machine and can be continuously molded; the PVC flocking composite material can be used as a novel high-grade indoor decorative material; after the PVC flocking composite material is used for decorating, the hand feeling is soft, the third dimension is strong and the sound absorption and heat preservation are realized.

The invention relates to a synthesis method of diethyl 2-[2-(2,4-difluorophenyl)allyl]-1,3-malonate. The synthesis method comprises the following steps: mixing 3-chloro-1,2-propanediol and 1,3-difluorobenzene, and adding a catalyst to react; adding the mixture into a hydrochloric acid solution at 5 to -5 DEG C, stirring uniformly, extracting 3-5 times by using dichloromethane as an extractant, and washing the extracting solution with a saturated NaHCO3 solution, water and a saturated saline solution; drying with anhydrous Na2SO4, filtering, evaporating the dichloromethane to obtain 1-chloro-2-(2,4-difluorophenyl)-3-propanol, mixing the 1-chloro-2-(2,4-difluorophenyl)-3-propanol and potassium hydrogen sulfate into chlorobenzene, and heating under reflux for 10-16 hours; and washing with water to a neutral state, drying with anhydrous Na2SO4, filtering, distilling to obtain 1-(1-chloromethylvinyl)-2,4-difluorobenzene, dissolving in DMSO (dimethyl sulfoxide), adding diethyl malonate and hydroxide to react, extracting, washing and carrying out reduced pressure distillation to obtain the target product. The synthesis route is disclosed in the specification.

The invention relates to the technical field of organic synthesis, and concretely relates to a preparation method of high-yield 4, 4'-biphenol. According to the preparation method, a metal-loaded semiconductor material is used as a catalyst, oxygen is used as an oxidizing agent, an oxidative coupling reaction of 2, 6-di-tert-butylphenol is realized, the reaction is carried out at normal temperature, the reaction speed is high, the conversion rate is high, and then a small amount of by-products are reduced into 4, 4 '-biphenol through a reduction reaction, purification and filtration are performed, tert-butyl is efficiently removed from the filtered product with p-toluenesulfonic acid as a catalyst, the target product is obtained, and the obtained 4, 4'-biphenol is high in yield and good in quality. The metal-loaded semiconductor material can be recycled, and a large amount of organic medium solvent and a large amount of aluminum trichloride are not used in the preparation process, so the method has the advantages of low environmental pollution, easiness in product purification, mild reaction conditions, low equipment requirements and good application prospects, and meets the requirements of large-batch production and manufacturing.

The invention provides a preparation method of 1-chloro-3,3,3-trifluoropropene. Under an action of a catalyst, 1,1-dichloro-3,3,3-trifluoropropane is subjected to liquid-phase dehydrochlorination to generate 1-chloro-3,3,3-trifluoropropene. The catalyst comprises a main catalyst and a cocatalyst, the main catalyst is an inorganic alkali, and the cocatalyst is a phase-transfer catalyst. The preparation method provided by the invention has the advantages of high yield, easily available raw materials, mild preparation process, simple operation, and fewer by-product impurities.

The invention discloses a hyperbranched surfactant and a preparation method thereof. According to the invention, a hyperbranched polyesteramine polymer with an amino terminal is synthesized, and the amino terminal is subjected to active chain segment modification, so that a hyperbranched surfactant with the hyperbranched polymer as an inner core and an active chain segment as a shell can be obtained. The hyperbranched surfactant provided by the invention has a spatial three-dimensional structure and a unique hole structure, so that the hyperbranched surfactant has good surface/interface activity, thereby having great advantages in the aspects of wetting, washing, emulsifying, compatibilizing and the like. The hyperbranched surfactant is simple in preparation method, environment-friendly in process and excellent in performance.

The invention relates to a synthesis method of 2-[2-(2,4-diflurophenyl)-2-propen-1-yl)-1,3-propanediol. The synthesis method comprises the following steps: mixing 2-chloromethyl epoxy propane with 1,3-difluorobenzene to perform reaction under an effect of catalyst to obtain 2-(2,4-diflurophenyl)-1-chloro-3-propanol; mixing 2-(2,4-diflurophenyl)-1-chloro-3-propanol with potassium hydrogen sulfate and chlorobenzene to perform reaction to obtain 1-(1-chloromethylvinyl)-2,4-difluorobenzene; enabling 1-(1-chloromethylvinyl)-2,4-difluorobenzene to react with diethyl malonate to obtain a product 2-[2-(2,4-diflurophenyl)propenyl]-1,3-diethyl malonate; dissolving 2-[2-(2,4-diflurophenyl)-2-propen-1-yl]-1,3-diethyl malonate in mixed solvent formed by isopropanol and water to react with borohydride to obtain a target product 2-[2-(2,4-diflurophenyl)-2-propen-1-yl)-1,3-propanediol; a synthesis route is as shown in the accompanying drawing.