219results about How to "High product purity" patented technology

The invention discloses a preparation method for ferrous lithium phosphate as anode material of lithium cell. Wherein, dissolving the ferric iron salt, lithium salt, doped phosphorus salt and reducer into dissolvant to react for 0.5-30h and obtain the amorphous ferric lithium phosphate; heating with 5-30Deg/min speed at nitrogen, argon gas or mixed atmosphere to 450-800Deg; baking for 20-600min; cooling with 1-20Deg/min speed to room temperature, and obtaining the crystal-type product. This invention reduces the ferric iron into ferrous iron and generates the final product with high specific capacity and well cycle performance. Wherein, the first charge/discharge efficiency of the product can achieve 100%.

The invention belongs to the field of the natural organic chemistry, relates to a method for extracting and purifying anthocyanins from wild blueberries in Greater Khingan, and particularly relates to a new method adopting a biological enzyme process, ionic liquid microwave extraction, and ultrafiltration membrane concentration coupled high-speed countercurrent chromatography purification to finally obtain highly pure blueberry anthocyanins. The method has the following advantages: 1, an ionic liquid has a very strong microwave absorption ability, so the ionic liquid microwave extraction process is fast and efficient, has a simple and easy process, fully extracts the blueberry anthocyanins effective ingredients, and realizes a high content of the anthocyanins effective ingredients; and 2, compared with traditional solid-liquid chromatography technology, the high-speed countercurrent chromatography purification technology has the advantages of flexible operation, high efficiency, rapid separation speed, large preparation amount and low cost, and can be industrially used. The blueberry anthocyanins obtained by using the method have high content and high activity, and has a purity reaching 42.7%.

The invention relates to a preparation technology of soybean lecithin for injection. Soybean lecithin is taken as a raw material, crude lecithin is firstly obtained after the treatment of acetone deoiling, membrane separation, adsorption decolorization and the like, then the crude lecithin is undergone column chromatographic fractionation, filtration sterilization, decompression concentration and vacuum drying, and finally the soybean lecithin for injection is obtained. The invention adopts membrane separation to replace the traditional solvent extraction, so the operation is easy. A polar compound with surface hydroxyl groups is taken as a stationary phase, mixed solvent composed of weak polar solvent and strong polar solvent is firstly used as eluent to carry out gradient elution, after all the cephalin flows out, the strong polar solvent is taken as the eluent, thereby not only the separation selectivity is high, but also the usage of the eluent is greatly reduced, and meanwhile, the extraction efficiency of lecithin is high, the product quality is stable, and the industrial mass production is benefited.

The invention relates to a method for preparing compound scutellarin with a structural formula as the formula I. The method is to prepare high-purity scutellarin by using 3,4,5-trimethoxyphenol as an initial raw material through acylation to form ester and phenol ester rearrangement, benzoylation to form ester and Baker-Venkarama rearrangement, cyclization, methoxyl removal and acetylization, alkylation, hydrogenolysis debenzylation, alkylation to form glucoside, neutralization with acid after basic hydrolysis in the absence of oxygen. The method for preparing the scutellarin has the yield reaching over 20 percent, has rich raw material sources, simple process and low cost, and has wide industrial application prospect.

The invention discloses a purification method of silicon carbide superfine micropowder, which comprises the following steps: mechanically crushing and shaping the selected silicon carbide raw material, washing the shaped raw material with initial water to remove carbon and magnetically separating the washed raw material to remove partial impurities on the surface; airing and drying the raw material washed with initial water, and carrying out crushing by a raymond mill and air flow classification to produce a product the grain diameter of which is between 1 and 15mu m; adding the product into a purification kettle, adding water to produce slurry, adding a flotation agent for floating to remove carbon, wherein the floating agent is kerosene and terpineol; respectively adding hydrochloric acid, sulfuric acid and hydrofluoric acid into the purification kettle; stirring the mixture and then washing with water until the pH value reaches about 7; adding solid sodium hydroxide and solid calcium hydroxide into the purification kettle then washing with water after stirring; and feeding the washed mixture to a classification kettle for classification after the pH value reaches 7. Through the purification treatment by using silicon carbide, the superfine micropowder is easy to separate. The product has the advantages of high purity, small grain diameter distribution, uniform grains, fewer impurities, high quality and wider application range.

The invention relates to a porous ferric oxide/carbon nanometer plate composite material as well as a preparation method of the porous ferric oxide/carbon nanometer plate composite material and application in preparing a lithium ion battery. The method comprises the following steps of uniformly mixing raw materials including ferrocene and ammonium sulfate in a given mass ratio; calcining the mixture in an inert gas high-pressure reaction kettle, then calcining the mixture in the air at a low temperature to obtain the porous ferric oxide/carbon nanometer plate composite material. The preparation method is simple in process, easy to operate, high in yield and applicable to the mass production. When being used as a lithium ion battery cathode material, the prepared porous ferric oxide/carbon nanometer plate composite material is high in specific capacity and excellent in circulation stability, and the capacity of the material is more than 1000mAh/g after being circulated for 100 times.

An energy-saving dual-effect methanol rectifying apparatus is composed of preheater for raw methanol, pre-rectifying tower, preheater for pre-rectified methanol, pressurizing tower, ordinary-pressure tower, re-boiling unit, condensing-reboiling unit and methanol recovering tower. The connections between said all units are also diseclosed.

The present invention discloses process of synthesizing Biapenem. The synthesis process includes the following steps: the hydrogenation reaction of the compound shown in expression I to eliminate protecting group inside buffer solution or the mixed liquid of buffer solution and organic solvent in the presence of catalyst of Pd or Pt containing compound; and the subsequent collection of Biapenem from the reaction product. The synthesis process is simple, high in product purity and suitable for industrial production.

The invention relates to a method for preparing an antioxidant. Pentaerythritol and phosphorus trichloride are taken as raw materials and subjected to cyclization to give dichloropentaerythritol diphosphite, and dichloropentaerythritol diphosphite is then subjected to substitution reaction with hindered phenol to give pentaerythritol diphosphite which is subjected to separation, washing, drying, and crushing to obtain the antioxidant. The method adopts a one-pot process to prepare the antioxidant, controls the mixing ratio of raw materials of the cylization, analyzes and supervises the reaction process through 31P NMR, saves separation and purification of intermediates, and reduces production costs. The obtained antioxidant is high in purity, used in polypropylene, and has good high temperature antioxygen property and color protecting capacity.

The invention provides a nickel cobalt oxide<@>manganese dioxide nuclear shell heterostructure nanowire array grown on carbon cloth and a preparation method and application thereof. Compared with the prior art, the product of the preparation method provided by the invention is high in purity, good in dispersibility, good and controllable in crystalline form, low in production cost and good in repeatability. The prepared nickel cobalt oxide<@>manganese dioxide nuclear shell heterostructure nanowire array grown on the carbon cloth can serve as an electrode material of a supercapacitor directly, long cycling stability, large specific capacitance, high energy density and power density are realized, and the nanowire array has a potential application value in the aspect of energy storage.

The invention relates to preparation method of roxadustat, which is [(4-hydroxy-1-methyl-7-phenoxyisoquinoline-3-formyl) amino] acetic acid. The preparation method has low cost, simple method and goodsafety and is suitable for industrial production.

A method for preparing a spherical alumina of high purity, relates to the preparation of alumina of high purity which is especially suitable to the used in the fields such as compact fluorescent lamp, illuminating material for PDP and LED and transparent ceramics, monocrystal of sapphire, monocrystal of ruby and polishing of paint of car. Its characteristics are that aluminum ammonium sulfate and ammonium hydrogen carbonate are used as the raw material to react into nanometer structure spherical aluminum ammonium carbonate AACH in the container with agitation, and the nanometer structure spherical ª†-Al2O3 and ª‡- Al2O3 are obtained by filtration, washing and roasting. The spherical alumina of high purity has remarkable liquidity, high mechanic strength, infragile and keeping its shape in the course. The invention has high purity, remarkable quality, few requirements for technical condition, without pollution and has low cost.

The invention discloses a method and a system for refining cyclohexanone and recycling cyclohexanol. The method is characterized by comprising the following steps: sending an alcohol ketone mixture into a light-component removal tower for removing light components, sending the material discharged from the tower bottom into a cyclohexanone product tower, acquiring a high-purity cyclohexanone product from the tower top and a crude product mainly comprising cyclohexanol from the tower bottom, then sending the crude product into a cyclohexanol recovery tower, and acquiring cyclohexanol from the tower top; mixing the acquired cyclohexanol with proper amount of water, heating and sending into a cyclohexanol dehydrogenation reactor for dehydrogenation, so as to obtain a mixed product containing cyclohexanol, cyclohexanone and water, performing two-stage cooling on the dehydrogenated product, then performing gas-liquid separation, sending the gas phase and the liquid phase into a dewatering tower for dewatering processing, sending oil-containing wastewater removed at the tower top to a cyclohexane extraction tower, sending an obtained upper-layer oil phase to an alcohol-ketone recovery tower, and sending an oil phase containing cyclohexanone and cyclohexanol and obtained at the bottom of alcohol-ketone recovery tower to a dewatering tower for cycling. The invention comprises the advantages that the product cyclohexanone is high in purity, cyclohexnoal is efficiently converted into cyclohexanone at a high yield, and the system is high in energy integration degree and low in energy consumption.

The invention discloses a saving technology of high-purity pantane and pantane foaming agent, which is characterized by the following: adopting topped crude or any one of other source materials or random proportional compounds as raw material; heating; pressurizing; connecting dehydrogenizing tower 2, isopentane tower 3, composite pantane tower 4, n-pentane tower 5 and cyclopentene 6 sequently; distilling; obtaining composite pantane as pantane foaming agent.

The invention relates to a preparation method of nanometer NaY molecular sieve, which is as follow: under the hypergravity condition of the revolving bed, performing guiding agent preparation, mother solution preparation, and mixing of guiding agent and mother solution, and the sequent crystallization of the reaction product. The invention enables to shorten the crystallization reaction time, simplify the technological process and prepare the high-quality nanometer NaY molecular sieves. The nanometer NaY molecular sieve catalyst prepared through the method can be used for the catalytic cracking of the heavy oil. Compared with the normal industrial molecular sieve, the nanometer NaY molecular sieve has the advantages of great increase of gasoline productivity, diesel fuel productivity, clean oil yield and total-liquid yield, improvement of the product selectivity, and obvious improvement of the product distribution.

The invention relates to a method for preparing silica through coal gangue aluminum extraction waste slag. The method comprises the following steps: firstly, mixing the coal gangue aluminum extraction waste slag with quartz sand while enabling the SiO2 content of the mixture to be larger than or equal to 90% and the Al2O3 content of the mixture to be smaller than 6%; then according to the molar ratio of 1: (0.3-1) of SiO2 to sodium carbonate, adding the sodium carbonate to the mixture; grinding the mixture into particles with diameters of 50-200 [mu]m; placing the particles in a converter at 750-830 DEG C for fusing reaction for 1-5 hours, so as to obtain coarse sodium silicate particles; dissolving the coarse sodium silicate particles in a high-pressure reaction kettle to obtain a sodium silicate solution; diluting the sodium silicate solution to 5-15 baume degrees; leading CO2 produced during the process of the fusing reaction to the diluted sodium silicate solution for carbonation, so as to obtain the silica. The solubility of the solid sodium silicate prepared according to the method can reach up to 90%. The silica conforms to the national standard; the oil absorption rate of the silica is larger than 3.1 ml/g. Through the adoption of the method, the comprehensive utilization rate of coal gangue is improved, CO2 produced during the process of the fusing reaction is eliminated by dissolving, and emission of three wastes is reduced.

The invention discloses a method for treating magnesium sulfate and magnesium sulfite wastewater by virtue of a lime method. Technical steps comprise settling purification, aeration oxidization, reactive crystallization separation, overflow liquid filtering, washing and drying, kettle-bottom slurry washing and separation and filtered stock recycling. Purified and oxidized wastewater and lime slurry are continuously added into a reaction crystallizer respectively, and a reactive crystallization condition is controlled to bond sulfate ions and calcium ions to form and settle calcium sulfate dihydrate crystals with larger particle sizes at the bottom of the reactive crystallizer and bond magnesium ions and hydroxide ions to form magnesium hydroxide with smaller particle sizes to continuously overflow from an overflow opening of the reactive crystallizer. The method has the characteristics of simple procedures, high separation efficiency, low equipment investment and running cost and the like, and can be used for treating magnesium sulfate and magnesium sulfite wastewater in large batches. Reaction products can be used for preparing high-quality magnesium hydroxide and calcium sulfate dihydrate for selling as chemical products; reaction mother liquor can be used as process water instead of fresh water, so that zero emission of magnesium sulfate and magnesium sulfite wastewater can be implemented.

A method for degrading dye waste water with ceria nano particles as catalyst pertains to the application technical field of ceria nano particles. The invention is characterized in that: firstly, powder of ceria nano particles is produced with a hydro-thermal method; secondly, the powder of ceria nano particles is added into activated blue dye waste water to degrade the activated blue dye waster water by illumination. The preparation technique of the catalyst of the invention is simple without calcinations or load, thereby, the purity of the product is high; the operation technique of the degradation is simple with easily controlled conditions and rapid degradation speed and the reaction can be taken placed by illumination under normal temperature and atmosphere, thereby being energy conservation.

The invention discloses a method for preparing ferric acetyl acetonade, which comprises the following steps of: adding isopropanol or methylbenzene serving as a solvent into a reactor, and raising the temperature to between 50 and 60 DEG C; adding iron powder into the reactor with stirring to make the iron powder uniformly dispersed in the isopropanol or methylbenzene; adding a protonic acid catalyst into the reactor, dripping diacetone, and controlling the temperature to between 50 and 60 DEG C until the dripping is finished; and raising the temperature of the reactor, adding oxygen into thereactor through an oxygenation device, keeping the temperature of between 50 and 90 DEG C, reacting for 3 to 5 hours, filtering, cooling, removing the solvent, and drying to obtain the product. The method has the advantages of high purity and fine particles of the product, the yield rate of 90 to 95 percent, less production steps, and simple process. Solution synthesis is adopted, mother liquor can be circularly used or recycled, the environmental protection requirement is met, the energy is saved, and the cost can be greatly reduced.

The invention discloses a novel production technique of heparin sodium, wherein the novel production technique comprises enzymolysis, flocculation treatment, resin adsorption and desorption, alcohol precipitation and refining processes. The enzymolysis process comprises: prompting heparin in small intestine of pig to release into enzymatic hydrolysate through a microwave method, performing flocculation treatment on the enzymatic hydrolysate to remove most part of impurities, adsorbing and eluting through resin, performing alcohol precipitation and drying procedures to obtain a crude product, and then, decoloring and refining the product through a macroporous polymeric adsorbent and hydrogen peroxide. The titer of the heparin sodium prepared by the procedures is larger than 150 U/mg, the technique is simple, and the product purity is high.

The invention discloses a preparation method and purposes for an iron oxide-based anode material for lithium ion batteries. The method comprises the following steps: 1) dissolving a ferric salt precursor in water, adding combustion agents after mixing uniformly, and after mixing uniformly, adding ammoniacal liquor to adjust the pH value; 2) placing the solution obtained in water bath for heating and evaporating, until the formation of viscous gel; 3) placing the gel in a muffle furnace for combustion reaction to obtain Fe2O3 powder; 4) obtaining a Fe3O4/C composite material after heat treatment at the temperature of 400-800 DEG C in the argon atmosphere of the Fe3O4 powder and an organic carbon source, wherein the carbon accounts for 0.5-40% by mass of the Fe3O4/C composite material. The Fe2O3 powder and the Fe3O4/C composite material prepared by using the method are used for preparing anode materials for lithium ion batteries. The method is simple and controllable and can be used in mass production; the Fe3O4 powder prepared by the method has a large specific surface area, and high purity; and by using the Fe3O4/C composite material prepared through reduction carbon coating as the anode material for lithium ion batteries, the batteries has high specific capacity, and good cycle stability and multiplying power performance.

The invention discloses a preparation method of 2,5-dihydrofuran. The method comprises the following steps: taking hydroxylamine or hydroxylammonium salt as a nitrogen source, taking 2,5-furandiformaldehyde as a raw material, dehydrating through 2,5-furandiformaldehyde dioxime intermediate under the catalyst effect, thereby efficiently preparing 2,5-dihydrofuran. The method realizes efficient synthesis of the active biomass-based furans dinitrile compound, thereby avoiding the polymerization side effect of the intermediate imide by taking the ammonia gas as the nitrogen source. Furthermore, the acid is used as dehydration catalyst, thereby prohibiting the condition that the nitrile is further hydrolyzed to generate the amide and like byproducts. The reaction condition is mild in conditionand simple in operation, and the manufactured 2,5-dihydrofuran product is high in purity.

The invention provides a method for preparing bisphenol A cyanate which comprises the steps of, dissolving the cyanogen chloride with a purity of 95-100% into organic solvent, dissolving bisphenol an and triethylamine into the same organic solvent, dropping the solution of bisphenol an and triethylamine into the cyanogen chloride solution, wherein the mol ratio of bisphenol A, cyanogen chloride and catalyst is 1 : 2-5 : 2-6, then extracting bisphenol A cyanate through conventional methods. The invention can realize improved purity and clean production.

Relating to the technical field of organic synthesis, the invention discloses a 3, 3', 4, 4'-oxydiphthalic dianhydride and 9-oxo(oxa)fluorene dianhydride composition, a preparation method and application thereof. The composition includes 3, 3, 4', 4'-oxydiphthalic dianhydride and 9-oxo(oxa)fluorene dianhydride in a mass ratio of 70-95:5-30. The composition provided by the invention can be prepared into high performance polyimide, which is far superior to polyimide synthesized purely from 3, 3', 4, 4'-oxydiphthalic dianhydride as the raw material in the aspects of tensile strength, heat resistance, mechanical strength and other performance. Through selection of an etherification reaction catalyst and a solvent, the invention provides a preparation method of the3, 3', 4, 4'-oxydiphthalic dianhydride and 9-oxo(oxa)fluorene dianhydride composition, and the method has the characteristics of simple operation, high product purity, low emission of "three wastes", and easy industrialization, thus having great application prospects.

The invention relates to a method for producing high-quality copper sulfate through low-pressure oxygen leaching of copper slag. A copper-bearing material with metallic copper or cuprous oxide content greater than 15wt% serves as a raw material, and the method comprises the steps of copper slag or spongy copper slag pickling of zinc hydrometallurgy. A dilute sulphuric acid solution is adopted for low-pressure oxygen leaching of the raw material, an obtained leachate is subjected to combined crystallization including cooling crystallization and salting-out crystallization, a copper sulfate crystal is obtained after liquid-solid separation, and dried after multistage washing, and copper sulfate meeting requirements of above a premium grade specified in YS/T 94-2007 is obtained.

The invention discloses a preparation method of high purity porous carbon. The preparation method comprises the following steps: mixing alkaline metal salt easily dissolved in water with a water soluble high molecular material for a pre-reaction to obtain a mixture, wherein the high molecular material is prepared from one or more of resin, cellulose and a cellulose derivative; then crushing the mixture to particles, the grain sizes of which are 0.01-5mm; heating the particles to 600-1000 DEG C for 0.5-8h at a heating rate of 1-20 DEG C/min in an inert atmosphere, and carbonizing and activatingthe particles to prepare porous carbon; and finally, soaking the cooled porous carbon with a solution to dissolve residual alkaline metal salt, and washing the porous carbon for many times and dryingthe same to obtain the porous carbon. According to the preparation method of high purity porous carbon, the specific surface area of the prepared porous carbon reaches up to 1200-2100m<2>/g; the residual alkaline metal salt can be fully dissolved and removed only with water without processes such as pickling, the ash content is lower than 0.5%, the porous carbon is free of impurities such as ferrum and chlorine, the product quality is high, the service life of the equipment is prolonged favorably, and the environmental pollution is reduced.

The invention discloses a synthetic method for 3-amino-4-fluorophenylboronic acid. The method includes the steps of conducting bromination on o-fluoronitrobenzene, conducting reduction to generate 5-bromo-2-fluoroanil, making 5-bromo-2-fluoroanil and tetrahydroxydiboron react in a coupled mode to generate the product, namely, 3-amino-4-fluorophenylboronic acid. According to the method, raw materials can be easily obtained, and operation is easy and convenient. The method is an appropriate route for preparing 3-amino-4-fluorophenylboronic acid.

The invention discloses a preparation method of R-3-aminobutyric acid. The method comprises the following steps: taking crotonic acid and ammonium salt as substrates; adding salt containing magnesiumions and regulating the pH (Potential of Hydrogen) by utilizing ammonia water; then adding recombinant aspartase as a biological enzyme catalyst; reacting at proper temperature and under an alkaline condition; after reacting, separating, purifying and crystallizing to obtain the R-3-aminobutyric acid. According to the method disclosed by the invention, ammonium ions of a reaction system are controlled, and reverse reaction is controlled and generation of byproducts is reduced; impurities including bacterial sludge, zymoprotein, sulfate ions, pigments and the like are intercepted by utilizing microfiltration and nanofiltration; high-quality products with high chiral purity and high impurity purity are obtained through continuous concentration and crystallization.

The invention provides a method for preparing permanent magnetic ferrite with high fracture toughness. The method comprises the steps of proportioning nanometer SrCO3 and Fe2O3 according to certain proportion, adopting ball milling to mix raw material powder well and refine the raw material powder again, drying and sieving the ball-milled raw material, placing the raw material in a high temperature furnace for solid phase reaction, performing secondary ball milling to synthetic SrFe12O19 powder, drying and sieving the ball-milled powder and adopting an isostatic pressing sintering method to combine molding and sintering into one. Strontium permanent magnetic ferrite prepared by the method has excellent mechanical properties, and can be applied in severe environments such as automobile starting motors, windscreen wiper motors, engine-cooling fan motors, and the like.

The invention discloses a preparation and purification method of paraphthaloyl chloride with a high purity, and belongs to the field of organic chemistry. The method comprises the following steps: carrying out a reflux reaction in the presence of a catalyst by taking terephthalic acid and thionyl chloride as raw materials, cooling and precipitating so as to obtain a crude product; filtering the crude product and then purifying the crude product in a melting crystallization or reduced pressure distillation manner; analyzing the contents of phthalic acid, thionyl chloride and catalyst in a filtrate; replenishing a proper amount of the terephthalic acid, thionyl chloride and catalyst according to the analysis result; then carrying out a circular reaction. Compared with the prior art, the method disclosed by the invention has the main advantage that the excess thionyl chloride does not need to be steamed out after the reaction is finished, but the crude product is obtained in a cooling and filtering manner, so that the filtrate is recycled. Thus, the consumption of energy and materials is decreased.