29 results about "Centrifugal separation" patented technology

The invention discloses porous zinc oxide nano powder and a preparation method thereof. The method comprises the following steps: firstly, zinc nitrate hexahydrate is dissolved in anhydrous ethanol or deionized water, added with PEG 400 under the condition of magnetic stirring and uniformly mixed; secondly, ammonium bicarbonate is dissolved in the deionized water or the anhydrous ethanol; thirdly, the mol ratio of the zinc nitrate to the ammonium bicarbonate is 1 to 2.5, and a zinc nitrate ethanol solution or a zinc nitrate water solution is dripped into the deionized water and/or an anhydrous ethanol solution of the ammonium bicarbonate, and then precursor is obtained; fourthly, the precursor is washed by an ammonium bicarbonate water solution after centrifugal separation, washed by the anhydrous ethanol, dried, added with n-butylalcohol, uniformly dispersed and then refluxed for 1 to 2 hours at a temperature of between 115 and 120 DEG C, the n-butylalcohol is recovered by vacuum distillation, and the porous zinc oxide nano powder is prepared by utilization of afterheat to dry solid by distillation. The particle diameter of the porous zinc oxide nano powder is between 10 and 250 nanometers; the inside of a nano particle has a porous structure; and the aperture of an inner hole of the particle is between 5 and 120 nanometers.

The invention discloses a preparation method of oryzenin antioxidant peptide, comprising the following steps: (1) screening rice slag with a mesh of 50-200 meshes, and adding water according to the material and water weight ratio of 1:6-12 to be dipped for 10-15 minutes; (2) pouring rice slag feed liquid into a colloid mill to be ground for more than or equal to 2 minutes, and grinding rice slag particles in the feed liquid; (3) adjusting the pH of milled and homogenized feed liquid to 8.0-9.5, adding phosphate buffer, adding alkali protease 200U/g-600U/g rice slag, stirring and carrying out enzymolysis for 1-3 hours at the temperature of 40-65 DEG C, and controlling hydrolyzing degree to be 10-15wt%; (4) killing enzyme and carrying out centrifugal separation; (5) vacuum concentrating, freezing and drying. When adopted to prepare oryzenin antioxidant peptide, the invention has wide raw material resource and low manufacturing cost, the obtained oryzenin antioxidant peptide has high antioxidant activity and high edible safety.

The invention discloses a preparation method of water-soluble sodium cellulose sulfate with high substituting degree, which comprises the following steps: 1) a reactor is added with concentrated sulphuric acid, slowly dropped with alcohol, stirred for reaction; the molar ratio of alcohol and concentrated sulphuric acid is 1: 1.8 to 2.8 and alcohol and concentrated sulphuric acid are mixed evenly to be made into a sulfonating agent; 2) the sulfonating agent is added with cellulose to form a non-homogeneous reacting system, stirred for reaction and washed by alcohol, thus obtaining sodium cellulose sulfate, wherein, the mass ratio of the sulfonating agent and the cellulose is 20 to 50: 1; 3) the sodium cellulose sulfate is added into water, the pH value is adjusted to 8 to 10 by using the solution of sodium hydroxide, the solution of the sodium cellulose sulfate is obtained through filteration; 4) ethanol is added into the solution of the sodium cellulose sulfate, centrifugal separation or filtering is carried out to obtain sodium cellulose sulfate precipitate which goes through vacuum drying, thus acquiring sodium cellulose sulfate. The sodium cellulose sulfate prepared by the invention has the advantages of relatively high substituting degree, little cellulose molecule degradation, relatively large molecule weight, etc., and has certain antibacterial and antivirus properties proven by research results.

The invention belongs to the food processing filed, and specifically relates to natural fruit vinegar and a processing process thereof. The natural fruit vinegar which is delicious and has high stability and the processing process thereof are provided. The proportion of the natural fruit vinegar is as follows: 3-5% of ponkan fruit vinegar, 6-10% of ponkan juice, 2-4% of carrot juice, 0.5-1.5% of honey, 4-6% of cane sugar, 0.1-0.2% of protein sugar and 0.04-0.08% of sodium citrate. The processing process comprises the steps of raw material selection; juice squeezing; centrifugal separation; alcohol fermentation comprising the procedures of inoculating and fermenting yeast liquid subjected-activation culture under the conditions that the inoculating quantity is 8-10%, the fermentation temperature is 25-35 DEG C and the fermentation time is 1-5 days; acetic acid fermentation comprising the procedures of inoculating acetic anhydride strains subjected-propagation culture into alcohol fermentation liquid under the conditions that the inoculating quantity is 3-17%, the fermentation temperature is 30-34 DEG C and the fermentation time is 1-5 days; blending; sterilization; and cooling.

The invention discloses a method of synthesizing a nano zinc silicate light emitting material by using waste silicon powder by a hydrothermal method. The method comprises the following steps: (1) dissolving Zn(CH3COO)2.2H2O, Mn(NO3)2.4H2O and hexadecyl trimethyl ammonium bromide in deionized water, adding the waste silicon powder, stirring for 15 minutes, adding sodium hydroxide or ammonium water with concentration being 25%, and stirring for 10 minutes to obtain a mixed solution; (2) putting the mixed solution prepared in the step (1) in a reaction kettle with the liner being polytetrafluoroethylene, sealing the reaction kettle, putting the kettle in an oven at 130-200 DEG C to react for 12-48 hours, taking, naturally cooling to room temperature, washing the product by distilled water. carrying out centrifugal separation, and naturally drying to obtain the zinc silicate light emitting material. By using waste silicon powder as a raw material, the method disclosed by the invention expands the range of reactants and can fully utilize industrial leftovers and achieve the purpose of recycling resources. Furthermore, the method disclosed by the invention which is a hydrothermal one-step reaction is simple and feasible and low in energy consumption.

The invention provides an extraction method for phellinus vaninii polysaccharide. The method comprises the following steps: crushing a phellinus vaninii fruiting body to 1-5 mesh, performing soaking in physiological saline for 8-24 h, performing centrifugation, and collecting residues; boiling the residues of the phellinus vaninii fruiting body in boiling water at 110-130 DEG C for 20-40 min, performing centrifugation, and collecting residues; adding water into the residues, performing freezing for 24-36 h, and performing unfreezing; adding water into the unfrozen mixture to obtain a mixed liquid, adding a complex enzyme into the mixed liquid, performing enzymatic hydrolysis at 50-60 DEG C for 2-4 h, and performing centrifugal separation to obtain a supernatant liquid; and finally, performing adsorption on the supernatant liquid by using resin, performing dialysis, performing concentration, and performing freeze drying to obtain the phellinus vaninii polysaccharide. According to the extraction method for the phellinus vaninii polysaccharide provided by the invention, the extracted phellinus vaninii polysaccharide has obvious activity of inhibiting tumor cell proliferation, has goodbiocompatibility compared with a polysaccharide extracted and purified by a chemical method, and does not bring an inflammatory reaction; and the phellinus vaninii polysaccharide provided by the invention can be used in anti-tumor drugs or health-care products.

The invention discloses an extraction technology for swida wilsoniana oil. The technology generally comprises the following steps that firstly, fresh swida wilsoniana fruits are cleaned, then are stewed and rapid cooled and are further punctured and centrifuged, separation of peels is realized by combining the separation of a separation shaking table, then heating and crushing are carried out, heating is carried out at a certain speed, rapid cooling is carried out, the heating is carried out again at a certain speed, pressure filtration is carried out, and finally, oil-water two-phase centrifugal separation is carried out on an oil-water mixed solution obtained by pressure filtration so as to obtain the swida wilsoniana oil. The technology has the advantages that the peels of the swida wilsoniana fruits can be conveniently and effectively removed, the extraction quality of the swida wilsoniana oil is improved, in addition, through a physical treatment method, under the condition that nutrient substances in grease are not damaged, the oil yield of the swida wilsoniana fruit is increased to the largest extent, and the nutrition and health of the swida wilsoniana oil are guaranteed.

The invention discloses preparation of a water-soluble metal-organic framework composite material and application thereof in detecting the concentration of fluorine ions in water. The preparation comprises the following steps of: preparing a urea solution; adding aluminum trichloride into ultrapure water, carrying out ultrasonic treatment until the aluminum trichloride is completely dissolved, adding 2-aminoterephthalic acid under a stirring condition, and stirring until the 2-aminoterephthalic acid is completely dissolved to obtain a mixed solution; slowly dropwise adding the urea solution into the mixed solution, and stirring to obtain a reaction solution; carrying out heat preservation after the reaction solution is heated, cooling, centrifuging, washing precipitates, and carrying out centrifugal separation to obtain a first product; and dispersing the first product into N, N-dimethylformamide, stirring, carrying out centrifugal separation to obtain a second product, dispersing thesecond product into methanol, stirring, carrying out centrifugal separation, and carrying out vacuum drying to obtain the water-soluble metal organic framework composite material. The composite material is used for detecting the fluorine ion concentration in water. The fluorescent probe prepared by the preparation method has a nanosheet microstructure, is easy to store, and has excellent solubility and good stability in water.

The invention discloses a preparation method for reducing the content of organic matter in desulfurization gypsum. The preparation method comprises clear water, a tank I, a tank II, a tank III, a centrifugal machine and a wastewater pipe; the clear water is connected with the tank I; the tank II is respectively connected with the tank I, the tank III and the centrifugal machine; the centrifugal machine is connected with the wastewater tank; and the other side of the wastewater tank is connected with the tank I. The preparation method comprises the following specific preparation steps: S1, sieving a desulfurization gypsum raw material; S2, weighing the volume of a mixed liquid; S3, removing floating organic matter on the surface of the mixed liquid in the tank I; S4, dispersing the organic matter in the tank II; and S5, conducting dewatering by the centrifugal machine. According to the characteristic that the specific gravities of materials are different, the floating separation technology is adopted, the organic matter content of the desulfurization gypsum of the power plant is subjected to primary removal, then the surfactant is added to disperse the remaining organic matter, and the surfactant has the characteristic of dispersing non-water-soluble substances; gypsum and impurities thereof can be separated through a centrifugal separation technology to achieve secondary removal; and the preparation method is simple in process, low in cost and easy for large-scale production.

The invention discloses a method for preparing a magnetic hybridized microsphere adsorption material for sewage treatment. The method comprises the steps: dissolving ferric nitrate and cobalt nitratein deionized water, adding modified attapulgite hybridized microspheres, carrying out uniform stirring and mixing, carrying out a heated refluxing reaction, and carrying out centrifugation, washing and baking, so as to obtain modified attapulgite-cobalt iron oxide magnetic hybridized microspheres; adding 2-methylimidazole and hollow zinc oxide microspheres into methanol, carrying out a stirred-mixed dissolution reaction, carrying out centrifugal separation and washing, and carrying out drying, so as to obtain zinc oxide composite microspheres; and adding cetyl trimethyl ammonium bromide, ultrapure water, anhydrous ethanol and ammonia water into nano ferroferric oxide, carrying out ultrasonic dispersion, then, dropwise adding tetrabutyl titanate, carrying out ultrasonic treatment, adding sunflower powder, carrying out magnetic stirring, carrying out magnetic field separation, then, carrying out washing, carrying out dispersing in acetone, carrying out heated refluxing stirring, carryingout magnetic field separation, carrying out alcohol washing, then, carrying out drying, carrying out heating-up treatment in a tubular furnace, carrying out cooling, and then, carrying out mixed ball-milling with the modified attapulgite-cobalt iron oxide magnetic hybridized microspheres and the zinc oxide composite microspheres, thereby obtaining the magnetic hybridized microsphere adsorption material.

The invention discloses a high-thermal-conductive composite material and a preparation method thereof. The composite material is prepared from the following raw material components in percentage by mass: 10 to 70% of thermal-conductive filler, 10 to 50% of a polymer matrix, and 1 to 40% of calcium carbonate. The preparation method comprises the following steps: taking a calcium chloride solution in a container, dropwise adding a polyacrylic acid solution, magnetically stirring at room temperature until uniform, then adding the thermal-conductive filler, continuously stirring, ultrasonically mixing until uniform and then adding a sodium carbonate solution, standing for several hours, then performing centrifugal separation to remove supernatant liquid to obtain a flexible composite material, moulding and then performing vacuum freeze drying, then performing high-temperature ablation under inert atmosphere to form a three-dimensional thermal-conductive skeleton structure, and finally performing vacuum assisted perfusion of the polymer matrix for curing and moulding. The thermal conductivity of the composite material disclosed by the invention can reach 10 Wm<-1>k<-1> or above, and the composite material can be used as heat dissipating materials for high-power devices.

The invention discloses an online high-temperature separation and purification device and method for carbon black fuel oil, and belongs to the technical field of carbon black fuel oil treatment equipment. The separation and purification device comprises a pressurizing device, a separation device and a purification device, and the pressurizing device is connected with the separation device through a first oil outlet pipe and a connecting hose. The separation device is connected with the purification device through a second oil outlet pipe, the pressurizing device is used for pressurizing the carbon black fuel oil to compress the carbon black fuel oil to be separated and purified, the separation device is used for centrifugally separating the carbon black fuel oil and removing moisture impurities in the carbon black fuel oil, and the purification device is used for purifying the centrifuged carbon black fuel oil. According to the separation and purification method, the separation and purification device is used for realizing online non-stop separation and purification of the carbon black fuel oil, so that the treatment efficiency is improved, and the automation degree is high.

The invention discloses a preparation method of a special-morphology micro nano structural lithium-rich manganese-based cathode material, and belongs to the technical field of novel energy material energy storage material preparation processes. The method comprises the following steps: dissolving a manganese salt and a nickel salt into distilled water according to a ratio to obtain an A liquid; dissolving a homogeneous precipitant weighed according to a ratio into distilled water to obtain a B liquid, introducing a certain ratio of an ionic liquid into the B liquid, performing full stirring, and performing uniform mixing; mixing the A liquid and the mixed B liquid, and performing full stirring; transferring the mixed liquid to a hydrothermal reaction kettle, performing a hydrothermal reaction, performing cooling to room temperature, performing centrifugal separation, performing washing, and performing drying to obtain a manganese-based precursor material; and finally grinding the precursor and a certain ratio of lithium carbonate, performing uniform mixing, performing pre-sintering, and performing calcination to obtain the lithium-rich manganese-based cathode material. The method provided by the invention solves the problems of high energy consumption, long consumed time and difficulty in control of product topography characteristics in the preparation process in the prior art.

The invention discloses a preparation method of a gold-palladium nano-catalyst used in CO oxidation reaction. The specific steps are as follows: 100mg titanium dioxide carrier, 4-6mL molar concentration is 2.0mmol L ^‑1 HAuCl ₄ Precursor solution and 4-6mL molar concentration of 2.0mmol L ^‑1 H ₂ PdCl ₄ The precursor solution was mixed evenly, and the reaction was stirred at 25 °C for 4 h. After that, the mixture was centrifuged, and the catalyst was washed with deionized water to remove chloride ions and other impurities on the surface, and then placed in a 50 °C oven to dry. The dried samples were placed in an inert atmosphere. Heat treatment at 300 ℃ in the middle, and then natural cooling to obtain gold-palladium nano-catalyst. The gold-palladium nano-catalyst prepared by the invention has good dispersibility, uniform distribution of catalyst particles, high utilization rate of active components, high catalytic activity and good stability of the gold-palladium nano-catalyst in CO oxidation reaction.

The invention belongs to the technical field of material centrifugation, and discloses a horizontal spiral discharging centrifuge. The horizontal spiral discharging centrifuge is provided with a fixedbase, fixed shafts are symmetrically and fixedly installed at the upper end of the fixed base, a rotating device is installed on the two fixed shafts, the outer part of the rotating device is provided with spiral fan blades, the outer parts of the spiral fan blades are sleeved with a cylindrical outer shell, a solid collecting plate which is matched with the spiral fan blades is arranged on the inner wall of the cylindrical outer shell; a feeding device is fixedly installed at the front end of the cylindrical outer shell through a pipeline, a material leaking hole is formed in the rear end ofthe cylindrical outer shell, a liquid collecting device is installed at the discharging end of the material leaking hole; and the rotating device is in tooth connection with a speed regulating modulethrough a coupler. According to the horizontal spiral discharging centrifuge, rotary centrifugal separation is carried out in the horizontal spiral discharging centrifuge through the centrifugal principle, so that solids can leak out by being tightly attached to the cylindrical outer shell, liquid flows out and is collected through the liquid collecting device, a large number of solid-liquid mixed materials can be continuously separated, and the working efficiency is greatly improved.

The invention discloses a fly ash enhanced washing and high-salinity wastewater resource utilization method. According to the fly ash enhanced washing and high-salinity wastewater resource utilization method, firstly, fly ash is subjected to water bath heating washing, the heating temperature ranges from 50 DEG C to 60 DEG C, a large number of soluble anions and heavy metal ions in the fly ash can be efficiently removed through the water bath heating washing mode, most heavy metal is washed out, and washing liquid and harmless fly ash are obtained; heavy metal precipitates in the washing liquid are removed in an inorganic-organic flocculating agent combined mode, purified high-salt water washing liquid and heavy metal precipitates are obtained, and the total heavy metal removal rate in the washing liquid can reach 99%; and the purified high-salinity water washing liquid contains about 6-15 wt% of potassium and sodium salts, the high-salinity water washing liquid is subjected to evaporative crystallization through an MVR evaporator, potassium salts are obtained through cooling crystallization, the potassium salts and mixed salt waste liquid are obtained through centrifugal separation, the mixed salt waste liquid is electrolyzed to obtain the sodium salts, recovery of the potassium salts and the sodium salts is achieved, and the potassium salt vacancy in China can be relieved.

The invention provides a heteroatom-doped porous carbon material with a high specific surface area, and a preparation method thereof. The preparation steps are as follows: (1) mixing a copper nanoparticle template with a surfactant and a reaction initiator in water to obtain a precursor mixed solution, then adding a polymer monomer are to carry out a polymerization reaction, and separating a polymer coated with the copper nanoparticle template by centrifugation; (2) performing thermal cracking on the polymer; and (3) treating the carbonized product with an acidic solution to dissolve the copper nanoparticle template, performing centrifugal separation to obtain a precipitate, namely the product, and retaining a supernatant to prepare a new copper nanoparticle template. The heteroatom dopingamount, morphology, particle size, and pore volume of the material provided by the invention are easy to control, and the application in different fields such as new energy materials, electrochemicalmaterials, and biological materials is convenient. In addition, the technical route realizes recycling of the metal nano template, the cost during large-scale production can be significantly reduced,and thereby the technical route has practical application significance.

The invention provides a natural antioxidant for biodiesel. The main ingredient of the natural antioxidant is a ginger extract. A preparation method adopts the method comprising the following steps: cleaning and decontaminating ginger, cutting the ginger into slices, drying in the sun and smashing, carrying out centrifugal separation after digestion with ethyl alcohol, then using a rotary evaporator to evaporate ethyl alcohol, and thus obtaining the antioxidant. According to the natural antioxidant provided by the invention, the oxidation stability of the biodiesel can be obviously improved, the quality of the biodiesel is greatly improved, and the antioxidant is wide in source, long in effective time, and is a low-cost and reproducible natural antioxidant with certain economic benefit, so that the service life of an oil product can be effectively prolonged. Meanwhile, the added antioxidant has no significant influence on other physicochemical properties of the biodiesel.