44results about How to "Strong purity" patented technology

The invention discloses a high-strength hardened and tempered steel plate for ocean engineering and a production method thereof. The steel plate comprises the components of 0.10%-0.15% of C, 0.15%-0.40% of Si, 1.10%-1.35% of Mn, 0-0.010% of P, 0-0.005% of S, 0.15%-0.45% of Cr, 0.10%-0.30% of Ni, 0.015%-0.028% of Nb, 0.015%-0.042% of V, 0.025%-0.045 % of Al, and the balance Fe and inevitable impurities. The production method comprises the procedures of converter steelmaking, LF refining, VD vacuum treatment, continuous casting, casting blank heating, rolling and hardened-tempered heat treatment. The steel plate is 20-50 mm in thickness, larger than or equal to 480 MPa in yield strength, 620-780 MPa in tensile strength, larger than or equal to 20% in elongation and larger than or equal to 100 J in -40 DEG C longitudinal impact work and has good comprehensive performance.

The invention discloses a method for preparing high-purity silica packing through a sol-gel process. The method is characterized in that monocrystalline silicon powder is taken as a silicon source, and under the catalysis of ammonia water, high-purity and monodispersed nanosilica hydrosol is firstly synthetized; and monodispersed microspheres are prepared through the sol-gel process, and the microspheres are subjected to thermal treatment, so that high-purity polyporous micron-size silica-based microspheres with the grain sizes of 2 to 10 um are finally obtained. According to the invention, the monocrystalline silicon powder is taken as the silicon source, and the ammonia water is taken as catalyst, so that such impurities as metal are prevented from mixing in, after the monodispersed microspheres are subjected to thermal treatment, the high-purity polyporous micron-size silica-based microspheres are obtained, have good monodispersity and uniformly-distributed surface pore structures, and can be used as silica packing directly without being processed in a grading manner.

The invention provides a method for separation and extraction of epothilone B from a sorangium cellulosum fermentation liquid, and belongs to the microbial fermentation pharmacy field. The method comprises the steps: after shake-flask cultivation of sorangium cellulosum strains, amplifying step by step, fermenting sorangium cellulosum, followed by carrying out macroporous resin adsorption, ethyl acetate desorption and methanol redissolution, and thus obtaining a crude product; carrying out column chromatography and HPLC analysis of the crude product to obtain a preliminary component of epothilone B, then adding a molecularly imprinted polymer for specific adsorption of epothilone B, and finally carrying out methanol elution and crystallization to obtain epothilone B. Sorangium cellulosum is produced by step-by-step fermentation, and at the same time, the molecularly imprinted polymer with the specific targeted adsorption capacity is adopted in the separation and extraction process, not only has a strong adsorption capacity on epothilone B, but also can easily extract epothilone B, so as to reduce the extraction cost of separation and extraction of epothilone drugs, and have more wide industrialized application prospects and economic benefits.

The invention relates to welding rods for oceaneering, in particular to a high strength welding rod for oceaneering and a manufacturing method and a welding method thereof. The welding rod and the methods are also suitable for the field of manufacturing of high-strength seawater corrosion resistant devices such as oceaneering ships, ocean oil pipelines and nuclear power devices. The manufacturing method includes the following steps of powder sintering preprocessing, binder disposition, power blending accuracy and stirring evenness control, welding rod manufacturing and welding rod baking time and temperature control. The welding rod is high in seawater corrosion resistance, ultralow in hydrogen, high in strength, toughness and purity and applicable to the oceaneering.

The invention discloses a preparation method of a ternary copper-based sulfide semiconductor semiconductor nanomaterial. The preparation method of the ternary copper-based sulfide semiconductor semiconductor nanomaterial comprises following steps: solvothermal method is adopted to prepare a nanometer scale ternary copper antimony sulfides of different stoichiometric ratios, an inorganic copper salt, an inorganic antimony salt, and a sulfur source are taken as raw material, middle temperature pressurization one-step reaction is adopted to prepare the ternary sulfide powder. The operation is simple; few steps are needed; the raw materials are cheap and easily available; the applicability on selection of different raw materials is high; in the preparation process, the product is easily prepared; product particle size is small; crystal grain growth is avoided; in the reaction process, preparation failure caused by explosive is avoided; the preparation method is beneficial for industrial large scale production; yield is as high as 86.2%; product phase purity is high; impurities are few; purity can be as high as 97.8%; the universality is high; technology is stable; production stabilityis high; a defect in the prior art that long time high temperature treatment is needed is avoided; and the prepared nanometer ternary sulfur antimony copper material can be widely used in the energy fields of lithium battery, thermoelectricity, and photoelectricity.

The invention discloses a method for preparing a metal boride coating, which comprises the steps of: mixing solid inorganic salts, ball milling to micron level, adding metal boride nanoparticles to the ball-milled mixed salt, adding acetone liquid and ultrasonically dispersing it. , after vacuuming and heating in a vacuum drying box, a solid mixed salt containing metal boride nanoparticles is obtained; the solid inorganic salt is put into a crucible, heated to melting in a resistance furnace protected by an inert gas, and the solid mixed salt is added to melt In the inorganic salt, nano-inorganic molten salt is formed. After stabilization, the graphite anode and the cathode to be deposited are inserted into the crucible, and after electrophoretic deposition, the metal boride coating can be obtained; the invention utilizes the high temperature environment of the inorganic molten salt to realize the inorganic molten salt. Electrophoretic deposition and sintering of metal boride nanoparticles in salt are carried out simultaneously, that is, "sintering while electrophoretic deposition", so as to obtain a dense and strong metal boride coating.

The invention discloses a health-care food capable of improving sleep and a preparation method of the health-care food, and belongs to the field of health-care foods. The health-care food capable of improving sleep comprises the following raw material components in parts by mass: 40-50 parts of fiveleaf gynostemma herbs, 35-45 parts of plantain herbs, 25-35 parts of poria cocos and 15-20 parts ofradix astragali. The preparation method of the health-care food capable of improving sleep comprises the steps of firstly, cleaning the raw material components, and then performing superfine crushingon the radix astragali so as to obtain radix astragali superfine powder, adding water to the fiveleaf gynostemma herbs, the poria cocos and the plantain herbs, performing decoction, performing filtering, performing decompressing concentration, after decompressing drying, performing crushing, and performing screening so as to obtain dry cream powder; and finally, uniformly mixing the prepared radixastragali superfine powder with the dry cream powder, making a soft material with ethanol of which the mass concentration is 85%, performing granulation, shaping granules, performing polishing, performing packing and performing inspecting. The health-care food capable of improving sleep not only obviously improves the sleep effect, but also is mild in drug property, is free from toxin and side effects, and is suitable for being taken for a long term, and drug tolerance is not liable to cause.

A process for preparing high-purity edible nano-fiber from grains includes such steps as extracting in diluted alkali solution to remove protein, high-temp alpha-amylase enzymolyzing for deactivating enzyme and removing odor smell, superfine wet pulverizing, ultrahigh-pressure dynamic nano-class homogenizing and spray drying.

The invention discloses a biodiesel preparation system suitable for kitchen oil. The system comprises a crude oil tank for receiving crude oil subjected to water removal and impurity removal by a pretreatment system, an esterification kettle connected to a discharge port of the crude oil tank, an ester exchange reaction kettle connected to a discharge port of the esterification kettle, and a rectification cutting tower connected to a discharge port of the ester exchange reaction kettle, wherein a settling tank group and a first layering tank are also arranged between the esterification kettleand the ester exchange reaction kettle so as to separate an acidic ionic liquid catalyst from esters; a discharge port at the lower part of the first layering tank is connected with an ionic liquid recovery tank, a discharge port at the upper part of the first layering tank is connected with a feed port of the ester exchange reaction kettle; a crude methyl ester settling tank, a second layering tank and a deodorization tower are further connected between the ester exchange reaction kettle and the rectification cutting tower, and a discharge port of the deodorization tower is connected to a feed port of the rectification cutting tower. Acid sludge cannot be generated, the subsequent treatment difficulty is greatly reduced, and the recyclable rate of the catalyst is high.

The invention discloses a method for hydrolyzing an aromatic polyester composite material and recovering a monomer. The method comprises the following steps: mixing the aromatic polyester composite material with a caustic soda solution and a polar solvent and reacting, so as to obtain decomposition fluid of an aromatic polyester, and then separating out biphenol, terephthalic acid and p-hydroxybenzoic acid from the decomposition liquid. The invention provides a new approach for recycling a glass fiber reinforced-liquid crystal polymer (LCP), so that the effect on the environment caused by a waste glass fiber reinforced-LCP is solved, turning waste into treasure is achieved, and monomers with important economic value, such as biphenol are recovered. The method is mild in reaction condition, free of high temperature and high pressure, simple in equipment and easy to operate, the decomposition rate of the polyester can be up to over 97%, the total yield of a monomer crude product is greater than 71%, and the separated biphenol with high purity has strong practical value.

The invention relates to the technical fields of molecular biology and medicine, in particular to a polypeptide targeting PD-L1 and its application. The present invention provides a polypeptide targeting PD-L1, its general formula is NX 5 x 4 x 3 EX 2 x 1 g. The polypeptide of the present invention has high affinity and specificity to PD-L1, can specifically and efficiently target PD-L1 positive tumor cells, and can be used as a polypeptide molecular probe to detect the expression of PD-L1 in tumor cells, and to Real-time monitoring of the efficacy of immunotherapy and screening of patients suitable for immunotherapy; it can also be used as a targeting polypeptide for targeted therapy and imaging of tumors with high expression of PD‑L1, and has broad application prospects.

The invent relates to a process for preparing super-strong anti-hard-water sodium (potassium) humate by using brown coal or decomposed coal as principal raw material, H2SO4 as acidating agent, H2O2 as oxidizing agent, and a two step synthesis is employed which consists of, subjecting the raw material containing rich humic acid (brown coal or decomposed coal) to acid-treatment under acidic conditions, then charging oxidation agent (hydrogen peroxide) under alkality condition, thus improving the product capability for resisting hard water.

The invention discloses a production process based on automatic machining of automobile parts. The process comprises the following steps of (1) melting raw materials to select 500 kg of aluminum blocks with the density greater than 2.4 g / cm<3>; selecting 80 kg of iron ore with the moisture content of less than or equal to 20%, preferably 15%, crushing, sieving through a 600-mesh sieve, placing theiron ore obtained through sieving in a sintering furnace for sintering reduction, and controlling the sintering reduction time to be 72 hours to obtain a blank A; and then placing the aluminum blocksand the blank A in a vacuum furnace, injecting 100kg of molten steel into the vacuum furnace for vacuum induction smelting, wherein the temperature of the vacuum furnace is controlled at 1000 DEG C,the pressure is controlled at 1.4 mpa, the vacuum induction smelting time is controlled at 60 min, and a raw material A in a molten state is obtained. The up-down motion of a cutting part is controlled through a lifting device, a protective cover driven by a first driving part is arranged on a cutting table, so that the cutting area can be separated from an operator when a workpiece is cut, the cutting part can be far away from the operator when the workpiece is placed, the safety performance of the production process based on automatic machining of the automobile parts is improved, and the personal safety of the operator in the cutting process is guaranteed.

The invention discloses a NaSbS2 nano material preparation method and belongs to the technical field of nano material preparation. Na3SbS4.9H2O prepared by a water bath method is utilized as a precursor material; water is utilized as a solvent, so that safety hazards caused by heat evaporation of an organic solvent and effects on the sample purity are avoided, and feasibility is strong; a reactionprocess is performed in a container with an opening, an expensive high-pressure reaction kettle has no need to be used, and limit of the reaction container volume is avoided; the technological conditions have the advantages of moderate conditions, environmental friendliness, simpleness and low cost; a NaSbS2 nanoparticle material can be prepared under a low temperature through heat treatment in the argon atmosphere; the NaSbS2 nanoparticle material has the advantages of good crystallinity, high purity, even dispersion and even morphology. According to the NaSbS2 nano material preparation method disclosed by the invention, the reaction raw materials are easy to obtain, the cost is low, processing equipment is simple, and energy consumption is low; furthermore, the precursor is prepared under the normal pressure, so that safety is good, and feasibility is strong; thus, the NaSbS2 nano material preparation method has the advantages of economic property, practicability and very good industrialization prospect.

The invention discloses a rapid heating device for metallurgy casting. The rapid heating device comprises a working box, a feeding hopper is inserted into the left side of the top of the working box,and a first rotating shaft is movably connected to the center of the bottom of the inner wall of the working box; and a first gear is fixedly connected to the surface of the first rotating shaft, a first motor is fixedly connected to the right side of the bottom of the working box, and an output end of the top of the first motor is fixedly connected with a second rotating shaft. According to the rapid heating device, the first rotating shaft, the first gear, the first motor, the second rotating shaft, a disc and a round bead are arranged so that a switch can control the first motor to work, the second rotating shaft can rotate, the disc can rotate, the round bead can rotate, the first gear can be driven to rotate when the round bead rotates, then the first rotating shaft can rotate and a built-in metal box can rotate slowly so that uniform heating can be facilitated, the heating effect can be better, the heating rate can be increased, and the purity of extracted metal can be higher.

The invention provides a method for separation and extraction of epothilone B from a sorangium cellulosum fermentation liquid, and belongs to the microbial fermentation pharmacy field. The method comprises the steps: after shake-flask cultivation of sorangium cellulosum strains, amplifying step by step, fermenting sorangium cellulosum, followed by carrying out macroporous resin adsorption, ethyl acetate desorption and methanol redissolution, and thus obtaining a crude product; carrying out column chromatography and HPLC analysis of the crude product to obtain a preliminary component of epothilone B, then adding a molecularly imprinted polymer for specific adsorption of epothilone B, and finally carrying out methanol elution and crystallization to obtain epothilone B. Sorangium cellulosum is produced by step-by-step fermentation, and at the same time, the molecularly imprinted polymer with the specific targeted adsorption capacity is adopted in the separation and extraction process, not only has a strong adsorption capacity on epothilone B, but also can easily extract epothilone B, so as to reduce the extraction cost of separation and extraction of epothilone drugs, and have more wide industrialized application prospects and economic benefits.

An organic electroluminescent material emitting blue light for the organic electroluminescent device is prepared through preparing the solution of 8-hydroxy quinoline in alcohol or acetone, adding triethyleneamine and aqueous solution of lithium sulfate, heaitng while stirring for reaction, filtering, washing and baking. Its advantages are high output rate and purity, high luminescent efficient and color purity, and high thermal stability.

The invention discloses a method for preparing high-purity silica packing through a sol-gel process. The method is characterized in that monocrystalline silicon powder is taken as a silicon source, and under the catalysis of ammonia water, high-purity and monodispersed nanosilica hydrosol is firstly synthetized; and monodispersed microspheres are prepared through the sol-gel process, and the microspheres are subjected to thermal treatment, so that high-purity polyporous micron-size silica-based microspheres with the grain sizes of 2 to 10 um are finally obtained. According to the invention, the monocrystalline silicon powder is taken as the silicon source, and the ammonia water is taken as catalyst, so that such impurities as metal are prevented from mixing in, after the monodispersed microspheres are subjected to thermal treatment, the high-purity polyporous micron-size silica-based microspheres are obtained, have good monodispersity and uniformly-distributed surface pore structures, and can be used as silica packing directly without being processed in a grading manner.