177results about How to "Production conditions are easy to control" patented technology

The present invention is preparation process of phosphor powder for blue light excited white light LED. The phosphor powder has the chemical formula of (R3-x-yCexLny)A5O12, where, R is at least one of Y, La, Gd, Tb, Lu and Sc; Ln is at least one of Pr, Dy, Nd, Sm, Dy and Bi; A is at least one of B, Al, Ga, Si, Mn and Mg; x is 0.01-1.2; and y is 0-0.2. The preparation process of the phosphor powder includes mixing oxides, hydroxides or salts corresponding to the elements in the formula and proper amount of flux; setting the mixture into the inner crucible with an unsealed cover, setting graphite or carbon between the outer crucible and the inner crucible, and covering the outer crucible with sealing cover; igniting inside a high temperature furnace at 1350-1700 deg.c, for 1-8 hr; cooling, crushing, washing and stoving to obtain the phosphor powder.

The invention discloses a dihydromyricetin cyclodextrin inclusion compound, which comprises cyclodextrin and dihydromyricetin, wherein the dihydromyricetin is embedded into a cyclodextrin cavity; and the inclusion compound employing the cyclodextrin as a host molecule and dihydromyricetin as a guest molecule is formed. The dihydromyricetin cyclodextrin inclusion compound has the beneficial effects that 1 the dihydromyricetin cyclodextrin inclusion compound is embedded by the cyclodextrin, and the solubility, the stability and the bioavailability of the dihydromyricetin are improved; 2 the preparation method of the dihydromyricetin cyclodextrin inclusion compound disclosed by the invention is simple in process and suitable for industrialized production; 3 a spray drying process is adopted, the process from spray drying to dust collection is finished within 20 seconds, the problem of product oxidation in the drying process is avoided, the method is simple in process, simple and convenient to operate; the production conditions are easy to control, and the inclusion rate of the dihydromyricetin is high; and 4 the dihydromyricetin used by the dihydromyricetin cyclodextrin inclusion compound is extracted from vitaceae ampelopsis, and the dihydromyricetin in the vitaceae ampelopsis is high in content, and is a natural substance and free of toxicity.

A nutritive health-care fruit juice is prepared through choosing Korean ganoderma as bacterial strain, preparing culture medium from germinated long-grained non-glutinous rice mild, malt juice and germinated soybean juice for deep ferment, slant culture, stage-one shaker culture, stage-two seeding tank culture, deep fermenting, mixing the fermented liquid with grape jice, apple juice and orange juice, homogenizing, degassing, sterilizing and cooling. Its advantage is rich bioactive substances (ganoderma polyose, gamma-aminobutanoic acid, etc).

The invention relates to an industrial production method for semi-crystal poly(aromatic ether nitrile), which belongs to the field of polymer material. The method comprises the following steps: 2, 6-dichloro benzonitrile and hydroquinone are taken as raw materials; anhydrous potassium carbonate is taken as a catalyst; in the presence of a solvent and a dehydrating agent, the raw materials and the catalyst react under atmospheric pressure to obtain the poly(aromatic ether nitrile) homopolymer with low molecular weight and regular chain segments; and then the molecular weight of polymer is increased through pressurization, so as to obtain the semi-crystal poly(aromatic ether nitrile) polymer with high molecular weight. Due to the increase of crystallinity and molecular weight, the mechanical properties and heat resistance of the semi-crystal poly(aromatic ether nitrile) polymer are obviously improved.

The invention discloses a production method of titanium alloy seamless tubes used for tubing coupling. According to the production technology of annular furnace heating, cross piercing, non-mandrel tube rolling, heating furnace heating and sizing, the special titanium alloy seamless tubes with the specifications being different and the performance meeting the requirements can be produced by using an existing mandrel mill set and dies of the existing mandrel mill set and adjusting technology parameters according to requirements. The special titanium alloy seamless tubes can be directly used for machining a tubing coupling machine without being subject to thermal treatment. The production method is simple, production conditions are easy to control, the yield is higher than 95%, mass production can be realized, and large scale benefits can be produced.

The invention belongs to the field of medical intermediate and particularly relates to a synthesis method of cefepime hydrochloride. The method comprises the following steps: adding (6R,7R)-7-amino-3-[(1-methyl-1-pyrrolidine)methyl]cef-3-ene-4-carboxylic acid hydrochloride and AE active ester in a mixed solvent of water and a water-soluble organic solvent; adjusting the pH value to 5.5-7.5, and performing an acylation reaction while keeping the temperature; extracting after the reaction, and recycling the organic phase through reduced pressure distillation; and adjusting the pH value of the water phase with hydrochloric acid, and crystallizing to prepare cefepime hydrochloride. The reaction is milder and adopts an acidic or nearly neutral environment, the influence of the reaction on cefepime is lower, the reaction is easier to control, the degradation probability and ring opening probability can be reduced, the purity of the finished product can be increased, the yield of cefepime can be increased, the quality of cefepime can be increased and the purity is above 99.5% through high performance liquid chromatography (HPLC) detection.

The invention discloses a composite artificial stone table board and a preparation method thereof. The composite artificial stone table board comprises a surface layer and a base material layer, wherein the surface layer is prepared from raw materials, namely, quartz sand, quartz powder, a curing agent, an accelerant, a solvent, multifunctional epoxy resin, a coupling agent, a pigment and heat-conducting powder; the base material layer is prepared from raw materials, namely, aluminum hydroxide powder, quartz powder, a curing agent, an accelerant, a solvent, multifunctional epoxy resin, a coupling agent and a glass mat. The composite artificial stone table board has the advantages that the table board is high in strength, high in torsion and bending deformation resistance, high in heat conductivity coefficient, quick in heat dissipation, good in heat resistance and flame-retardant, does not age and yellow easily and the like, and the table board is suitable for popularization and application.

This invention relates to microorganism fermentation domain, is a method of preparing rhANP by the way of high density fermentation. This invention uses PCW112-ANP/DH5 alpha , through expand seed culture medium solution talus bacterium, high density fermentation, separation and purity e.g. craft procedure, we prepares the rhANP. This invention dissolves the problem of ANP express and difficulty of purity which has imprisoned the industrial application of it. Its production condition is easy to control and the material of bacterium is easy to obtain, with good repeat activity, low cost, and product can be applied to biology pharmacy.

The invention belongs to the technical field of polymer materials, and especially relates to a polyaryl ether nitrile resin and an industrialized synthetic method thereof. The structural unit of the polyaryl ether nitrile resin is one of units shown in the specification, and the crystallinity degree of the polyaryl ether nitrile resin is 28-38%. The polyaryl ether nitrile resin prepared by the invention is high in purity and high in crystallinity degree (28-38%); the glass transition temperature is 150-180 DEG C, the melting point is 310-355 DEG C, and the initial decomposition temperature is more than 450 DEG C; the resin has higher mechanical strength, the tensile strength is 100-120Mpa, the tensile modulus is 2.4-3.6GPa, and the bending strength is 100-140Mpa; and therefore, the polyaryl ether nitrile resin prepared by using the method disclosed by the invention can be applied to the fields such as aerospace, electronics, machinery, medical treatment, chemical engineering and the like.

The invention discloses a method for producing chlorinated butyl rubber which comprises the steps of dissolving, chloridizing, neutralizing and charging adjuvant. The invention realizes simple process, easy processing, easy production condition control, and better product quality.

The invention discloses a method for preparing n-butane from mixed butane, and relates to the technical field of n-butane synthesis. The method includes placing the butane in a fixed-bed reactor, adding hydrogenation catalysts into the fixed-bed reactor, circularly filling the fixed-bed reactor with hydrogen and carrying out hydrogenation reaction; uniformly mixing reaction products and desulfurizing agents with one another to obtain mixtures and feeding the mixtures into a distillation tower; feeding desulfurized products into a rectification tower, collecting propane from the top of the rectification tower, collecting the n-butane from the bottom of the rectification tower and collecting isobutane in the middle of the rectification tower; carrying out normalization reaction on the collected isobutane under the effects of catalysts to generate the n-butane. The butane which is about to be placed in the fixed-bed reactor is a byproduct generated in production procedures for refining petroleum, preparing ethylene by means of steam cracking, preparing olefin from methanol and the like. The method has the advantages that the method includes chemical processes, accordingly, operation such as repeated fractional distillation and rectification required by conventional physical methods can be omitted, production processes can be simplified, conditions can be controlled in production procedures, the n-butane prepared by the aid of the method is high in purity, and byproducts rarely can be generated.

The invention discloses high-performance spherical ultrafine silver powder for solar cell electric conduction silver paste and a preparation method thereof. The method comprises the following steps: (1) silver nitrate is dissolved in distilled water for uniform stirring; and a dispersing agent and a pH value adjusting agent are added; (2) hydroquinone is dissolved in the distilled water to obtainhydroquinone solution; and under the stirring condition, the obtained hydroquinone solution is quickly added in silver nitrate solution for reaction; and (3) after the reaction is finished, the staticsettlement and the suction filtration are performed; anhydrous ethanol is used for repeated washing and precipitation; and finally, the silver powder is obtained by drying. The invention further provides the high-performance spherical ultrafine silver powder for the solar cell electric conduction silver paste, which is prepared by the method. The sigh-performance spherical ultrafine silver powderfor the solar cell electric conduction silver paste and the preparation method thereof are easy to control the process conditions; and the performances of the prepared silver powder with high densityand easy dispersibility meet the production requirements of the solar cell electric conduction silver paste.

The invention discloses a preparation method of a high temperature resistant forsterite type refractory material. The method comprises the following steps: using nickel-iron slag as raw materials and magnesia powder as additives, wherein the ratio of [w (MgO) + w (FeO)] to [w (Al2O3)+w (Cr2O3)] is 10.50 to 13.57, the ratio of w (MgO) to w (Cr2O3) is 34.90 to 48.12 and the ratio of w (MgO) to w (SiO2) is 1.19 to 1.61, adding binding agents and controlling calcination temperature to be 1360 DEG C to 1450 DEG C, inducing mineral phase reconstruction of the nickel-iron slag, optimizing transformation process of refractory crystal form (Mg2SiO4, MgO.Fe2O3, MgO.Al2O3, MgO.Cr2O3) to increase refractoriness of the refractory material. The refractoriness of the obtained refractory material is 1700 to 1800 DEG C, and the refractory material also has the advantages of high compressive strength, large bulk density, low apparent porosity, and can fully meet the industrial need of the refractory material. The preparation method of the high temperature resistant forsterite type refractory material has the advantages of high utilization rate of resources, high production efficiency, high added value, environment friendliness, easiness in process control, low production cost and the like.

The invention provides a synthesis method and application of a citrate-covered water soluble CdS nanomaterial. The synthesis method comprises the following steps of: a, adding soluble citrate into solution of soluble salt in which cadmium ions are dissolved to prepare precursor solution of Cd-Cit; b, adjusting the pH value of the precursor solution with solution of sodium hydroxide, and removing oxygen from mixed solution by introducing an inert gas; and c, adding sodium sulfide into the mixed solution, and reacting for a certain period of time to obtain the citrate-covered water soluble CdS nanomaterial. A water soluble quantum dot with high dispersibility and high fluorescent performance can be obtained under mild conditions. The obtained quantum dot can be used for analysis and measurement of cysteine.

The invention provides a phase change energy storage microcapsule and a preparation method thereof, and belongs to the technical field of phase change energy storage. A shell material of the phase change energy storage microcapsule provided by the invention is polyimide resin, and a core material of the phase change energy storage microcapsule is an n-alkane phase change material. According to thephase change energy storage microcapsule disclosed by the invention, the polyimide resin is used as the shell material, and the n-alkane phase change material is used as the core material, so that the shell material of the phase change energy storage microcapsule is ultrathin, good in compactness, good in mechanical strength and thermal stability, controllable in particle size and high in phase change latent heat value; wide application prospects are realized in the fields of electronic device thermal interface materials, textile and clothing, solar energy storage and the like. The phase-change energy-storage microcapsules are prepared by adopting a solvent evaporation method, the operation is simple and convenient, the experiment and production conditions are easy to control, and the method has the advantages of stable system, small temperature change, recyclable solvent, low residue and the like, and is convenient for realizing large-scale production.

The invention discloses blueberry milk-beer drink and a production method thereof. The production method comprises the steps of fermenting by using lactic acid bacteria and saccharomycetes so as to respectively prepare lactic acid bacteria fermented milk and saccharomycete fermented milk, and mixing the prepared lactic acid bacteria fermented milk and saccharomycete fermented milk so as to prepare mixed fermented milk; after that, adding clear blueberry juice, a sweetener and a compound stabilizer into the mixed fermented milk to obtain blueberry mixed fermented milk; carrying out two-stage high-pressure homogenization, injecting CO2, filling, and sterilizing to obtain a blueberry milk-beer drink finished product. The production method provided by the invention is simple in technology and short in production cycle, can shorten the production cycle to 12h or less, is high in production efficiency and product stability, low in equipment requirements and less in production investment, and can greatly reduces the production cost. The obtained product not only has the unique characteristics of milk flavor, low alcohol, tongue astringency, nutrition and health care of milk-beer, but is also endowed with special blueberry flavor due to the addition of the blueberry juice; therefore, the nutritional and health care functions of the milk-beer are further improved, and the blueberry milk-beer drink is suitable for home, sports, travel and meeting with friends and has wide market prospect.

The invention relates to the field of thermoplastic elastomers, and discloses a halogen-free flame-retardant nitrile rubber/nylon thermoplastic elastomer and a preparation method thereof, wherein thethermoplastic elastomer contains a nitrile rubber, nylon, a flame retardant, a vulcanizing agent, an anti-aging agent, an antioxidant and an auxiliary agent, the vulcanizing agent is an organic peroxide, and the organic peroxide is at least one selected from dicumyl peroxide, bis(t-butylperoxyisopropyl)benzene, t-butyl cumene peroxide, 2,5-bis(t-butyl peroxy)-2,5-dimethyl-3-hexyne, 2,5-bis-(tert-butyl peroxy)-2,5-dimethyl hexane, dibenzoyl peroxide, tert-butyl peroxybenzoate, and di-tert-butyl peroxide. According to the present invention, the nitrile rubber/nylon thermoplastic elastomer has characteristics of high elasticity, easy processing, repeated processing, good flame retardant performance and the like, and can be used for vehicle oil pipelines and sealing members.