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22374 results about "Mixed solution" patented technology

Method for extracting krill oil with high phosphatide content from Antarctic krills

The invention discloses a method for extracting krill oil with high phosphatide content from Antarctic krills. The method comprises the following steps: (1) drying fresh Antarctic krills to obtain dry Antarctic krills; (2) performing extraction to dry Antarctic krills for 3 times with organic solvent; (3) mixing the extracting solutions, evaporating the mixed extracting solution to obtain Antarctic krill oil with the phosphatide content of 30-35%; then introducing nitrogen or carbon dioxide to remove the residual organic solvent; and adding polar organic solvent in the Antarctic krill oil, mixing evenly, standing to ensure that the mixed solution performs natural layering; and evaporating the lower solution to obtain the Antarctic krill oil with high phosphatide content, and then introducing nitrogen or carbon dioxide to remove the residual polar organic solvent so as to obtain a product. The extraction technology is performed at a low temperature, thus the red color of krill oil can be maintained and the beneficial ingredients in the product can not be damaged. The invention has high extraction efficiency and good phosphatide accumulation effect. Therefore, the Antarctic krill oil with high phosphatide content can be obtained and other byproducts can also be obtained.
Owner:SHANDONG NORMAL UNIV +1

Super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and preparation method and application thereof

The invention discloses a super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and a preparation method and an application thereof. According to the method, fabric mesh with a specification of 100-300 meshes is subjected to ultrasonic cleaning, and is air-dried under normal temperature; a hydrophilic polymer water-sensitive agent and a cross-linking agent are dissolved in water according to a ratio of 1:9-9:1; the mixture is well mixed by magnetic stirring, such that a solution with a concentration of 1-99% is prepared; nano-sol is prepared with a sol-gel method; the solution and the nano-sol are prepared into a mixed solution with a concentration of 1-99%, and the solution is well dispersed through ultrasonic dispersion; the mesh is soaked in the mixed solution and is vertically lifted, or the mesh is directly sprayed by using a high-pressure spraying gun; and the mesh is bake-dried, such that the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane is obtained. Contact angles of the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane with water and oil in air are both 0 DEG, and the membrane is super-hydrophilic. Under water, the contact angle of the membrane with oil drops is larger than 150 DEG, and the membrane has an oil drop low adhesion characteristic. The mesh membrane provided by the invention can be used in oil-water mixture separation and oil-containing sewage processing.
Owner:SOUTH CHINA UNIV OF TECH

Method for extracting tungsten, titanium and vanadium from waste SCR (selective catalytic reduction) catalyst

The invention discloses a method for extracting tungsten, titanium and vanadium from a waste SCR (selective catalytic reduction) catalyst, which comprises the following steps: crushing the waste SCR catalyst, adding a strongly alkaline solution, and reacting; filtering, separating, then adding strong acid into the sodium tungstate and sodium vanadate mixed solution, and reacting to obtain tungstic acid and a sodium salt and vanadic acid mixed solution; regulating the pH value of the sodium salt and vanadic acid mixed solution until precipitate is separated out, thus obtaining ammonium vanadate; then adding sulfuric acid into the tungsten-and-vanadium-removed SCR catalyst, and reacting to obtain a titanyl sulfate solution and solids such as aluminum slag and the like; then adding water into the titanyl sulfate solution, and hydrolyzing to obtain titanic acid and a waste acid solution; and finally, respectively calcining the obtained ammonium vanadate, tungstic acid and titanic acid to obtain vanadium pentoxide, tungsten trioxide and titanium dioxide. According to the invention, tungsten, titanium and vanadium can be extracted from the SCR catalyst through the reaction with strong alkali and strong acid at a low temperature, the equipment requirement is low, the energy consumption is low, some products having added values can be coproduced, and no secondary pollution is generated, thereby facilitating popularization and application.
Owner:成都新智金森环保科技有限公司

Method for preparing nickel cobalt aluminum serving as cathodic material of lithium ion battery

The invention discloses a method for preparing nickel cobalt aluminum serving as a cathodic material of a lithium ion battery, which comprises the following steps of: mixing nickel salt solution and cobalt salt solution uniformly, adding complexing agent solution, precipitant solution and the mixed solution into a reaction kettle with base solution in a parallel flow mode to perform precipitation reaction, performing solid-liquid separation after the reaction is performed fully, and washing; adding the washed solid material into the reaction kettle, dripping aluminum salt solution and the precipitant solution slowly to perform secondary precipitation reaction, so that an aluminum element is precipitated on the surface of the solid material gradually, stirring continuously in the integral process, performing solid-liquid separation after the reaction is finished, and washing and drying the solid material to a precursor of the cathodic material of the lithium ion battery; and mixing the precursor and a lithium source, performing two-section sintering under the condition of introducing oxygen, and crushing the calcined material which is subjected to the two-section sintering and performing subsequent processing to obtain the nickel cobalt aluminum serving as the cathodic material of the lithium ion battery. The method has the advantages of low requirement on equipment, high automation degree, environment friendliness, few wastes, high quality of products and the like and is easy to operate.
Owner:HUNAN CHANGYUAN LICO CO LTD

Graphene-supported cobaltosic oxide nano composite material and preparation method thereof

The invention discloses a graphene-supported cobaltosic oxide nano composite material and a preparation method thereof. The graphene-supported cobaltosic oxide nano composite material consists of graphene and cobaltosic oxide, wherein the cobaltosic oxide is loaded on graphene nano sheets; the content of the graphene nano sheets is 2 to 95 weight percent, and the thickness of the graphene nano sheets is 0.3 to 50 nanometers; and the particle size of the cobaltosic oxide is 1 to 200 nanometers and the cobaltosic oxide is ball-shaped or flaky. The preparation method comprises: firstly, mixing solution of graphene oxide, a bivalent cobalt salt and a polymer surfactant; and secondly, mixing the solution obtained by the first step with alkaline solution added with an oxidant, stirring the mixed solution or stirring the mixed solution by ultrasonic waves for 0.2 to 5 hours, transferring the mixed solution to a high-temperature reaction kettle, annealing the reaction product at 100 to 250 DEG C for 3 to 30 hours to obtain a product and washing and drying the product to obtain the graphene-supported cobaltosic oxide nano composite material. The size of the cobaltosic oxide is controllable. The reduction of the graphene oxide and the generation of the cobaltosic oxide are accomplished at the same time.
Owner:SOUTHEAST UNIV

Method for preparing multilayer composite membrane for secondary battery by using electrostatic spinning coating method

The invention discloses preparation of a multilayer composite membrane for a secondary battery by using an electrostatic spinning coating technology combined with a pore-forming technology, a manufacturing method of the multilayer composite membrane and the secondary battery prepared by using the membrane. The method is characterized by comprising the following steps of: (1) dissolving a high-molecular organic matter into a solvent to form a high-molecular solution; (2) adding a small-molecular organic matter and/or an inorganic nanometer material into the high-molecular solution to ensure that the small-molecular organic matter is dissolved into the high-molecular solution; dispersing an inorganic nanometer material into the high-molecular solution to form an organic/inorganic mixed solution; (3) uniformly coating the formed organic/inorganic mixed solution on at least one side of a film matrix by using the electrostatic spinning coating technology to form a composite film, and drying the composite film; and (4) extracting the small-molecular organic matter from the dried composite film to continuously dry and form the multilayer composite membrane for the secondary battery. By using the method, an inorganic complex of inorganic membranes is realized quickly and conveniently, the ionic conductivity of the lithium ion battery membrane can be improved, and the heat stability and the security of the battery are guaranteed; and the method has the advantages of being simple in operation and convenient for industrialization.
Owner:LONG POWER SYST SUZHOU

Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method and application thereof

ActiveCN101527202AImprove double layer capacitanceExcellent supercapacitor performanceElectrolytic capacitorsHybrid capacitor electrodesPolyaniline compositeAniline
The invention discloses an oxidized grapheme/polyaniline super capacitor composite electrode material and the preparation method and the application thereof. The preparation method comprise the following steps: firstly, adding oxidized graphite to water for ultrasonic dispersion so as to form an oxidized grapheme solution with uniformly dispersed single pieces; at room temperature, dropping aniline to the obtained oxidized grapheme solution for continuous ultrasonic dispersion to from a mixed solution; at a low temperature condition, adding hydrogen peroxide, ferric trichloride and a hydrochloric acid solution dropwise to the mixed solution, and stirring the solution for polymerization; and after the reaction is finished, centrifugating, washing and roasting the obtained mixed solution in vacuum to obtain the oxidized grapheme/polyaniline super capacitor composite electrode material which is used as the electrode material of an electricity storage system of a super capacitor and a battery. The oxidized grapheme/polyaniline super capacitor composite electrode material with good electrochemistry performance is obtained by the method, and the specific capacity of the oxidized grapheme and the polyaniline is greatly improved. In addition, the addition of the oxidized grapheme improves the charge and discharge service life of the polyaniline.
Owner:NANJING UNIV OF SCI & TECH

Method for removing hydrogen sulfide in gas phase through oxidization under high gravity field

The invention discloses a method for removing hydrogen sulfide in a gas phase through oxidization under a high gravity field, which comprises the steps of: enabling a desulfurizing agent to be in a countercurrent or cross current contact with a hydrogen sulfide containing gas in a desulfurizing high gravity machine; and then adding the desulfurizing agent rich in sulphur in a sulphur sedimentation agent and then enabling the desulfurizing agent added with the sulphur sedimentation agent to be in a countercurrent or cross current contact with air in a regeneration high gravity machine, whereinthe desulfurizing agent is a mixed solution consisting of complex iron, aqueous alkali, a sulphur modifying agent and a defoaming agent, and in the mixed solution, the concentration of iron ions is 0.1-10g/L, pH is 8.0-9.2, the concentration of the sulphur modifying agent is 10-200ppm, and the concentration of the defoaming agent is 5-50ppm. The high gravity machine is used for replacing the traditional low-transfer-efficiency reactor, and a high gravity rotary packed bed reactor is adopted during hydrogen sulfide oxidization and catalyst regeneration, thus process transfer efficiency is greatly strengthened, and time of oxidization desulfurization and regeneration of a desulfurizing agent is shortened; in addition, the sedimentation agent is adopted in a sulphur sedimentation stage and acts together with the sulphr modifying agent, thus the sulphur sedimentation time is also greatly shortened.
Owner:WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD +1

Graphene/silver phosphate composite visible light photocatalyst and preparation method thereof

The invention discloses a high-efficiency graphene/silver phosphate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of composite materials and environmental management photocatalysis. The preparation method comprises the following steps: dissolving graphene oxide in water, and carrying out ultrasonic treatment to obtain a graphene oxide dispersed liquid; dissolving silver nitrate in deionized water, gradually and dropwisely adding into the graphene oxide dispersed liquid while stirring to obtain a mixed solution, uniformly stirring, and aging; dropwisely adding a prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the graphene oxide-silver nitrate mixed solution, continuing stirring, transferring into a hydrothermal reaction kettle, carrying out hydrothermal reaction, and cooling to room temperature; and washing the reaction product, and carrying out vacuum drying to obtain the visible light photocatalyst. The invention has the advantages of wide material sources and simple preparation process; and the obtained composite material has the advantages of controllable structure and regular pattern, and has high-efficiency degradation effect on organic dyes rhodamine B and methylene blue with certain concentration under the visible light irradiation.
Owner:JIANGSU UNIV

Preparation method of ozone oxidation catalyst loaded with polymetallic oxide

The embodiment of the invention discloses a preparation method of an ozone oxidation catalyst loaded with polymetallic oxide. The method comprises the following steps that an ozone oxidation catalyst carrier is pretreated, wherein the pretreatment method comprises the steps that the ozone oxidation catalyst carrier is soaked through an acid solution after being washed through water, and then the soaked carrier is washed to be neutral and dried; immersion treatment is conducted on the pretreated ozone oxidation catalyst carrier at least once, and then calcination is conducted; the immersion treatment comprises the steps that the pretreated ozone oxidation catalyst carrier is immersed in an immersion solution to be immersed for 6-48 h at the temperature ranging from 20 DEG C to 100 DEG C, and then drying treatment is conducted, wherein the immersion solution is a mixed solution of nitrate, sulfate and acetate or chloride of three metal elements of manganese, nickel, iron, cerium, cobalt and copper, and the concentration of each metal element in the immersion solution ranges from 0.01 mol/L to 1.00 mol/L. By means of the preparation method of the ozone oxidation catalyst loaded with the polymetallic oxide, the removal rate of chemical oxygen demand (COD) in sewage can be significantly increased.
Owner:POTEN ENVIRONMENT GRP +1

Efficient oil and water separation composite fiber film and preparation method thereof

InactiveCN103866492ASelf-supportingRealize multiple reuseFilament/thread formingNon-woven fabricsFiberHydrophobic polymer
The invention discloses an efficiency oil and water separation composition fiber film and a preparation method thereof, and belongs to the field of functional nanometer fiber materials. Hydrophobic polymers such as polyurethane, polystyrene and polymethyl methacrylate or polycaprolactone are used as the main raw materials of the fiber film, the main raw materials are dissolved in an organic solvent to form a polymer solution, hydrophobic nanometer particles are added into the polymer solution in the preparation process, after the mixture is evenly mixed, electro-spinning is conducted on the mixed solution by means of the electrostatic spinning method, and then a fiber film material which is formed by micro-nanometer composite structures and is in the shape of non-woven fabric is obtained. The electro-spun fiber film of the micro-nanometer structure has super-hydrophobic/super-oleophylic property in the air and excellent oil adsorption performance, and the contact angle to oil is nearly zero. The efficient oil and water separation composite fiber film is simple in preparation method, low in energy consumption, high in efficiency, high in oil and water separation speed, and capable of being widely used in the fields such as oily water efficient purification.
Owner:BEIJING INSTITUTE OF CLOTHING TECHNOLOGY

Novel polymer-based composite material and preparation method of composite material as well as method for deep fluorine removal of water body

The invention discloses a novel polymer-based composite and a preparation method of the composite material as well as a method for deep fluorine removal of a water body, belonging to the fields of drinking water and industrial wastewater treatment, and environment function materials. The substrate of the composite is styrene-divinylbenzene copolymerized spheres, and nanometre zirconia hydrate particles are uniformly distributed in the holes of the spheres. The method for deep fluorine removal of the water body comprises the following steps of: (a) filtering fluorine-containing wastewater, and adjusting the pH of a filtrate to 3.0-8.0; (b) passing the filtrate through an adsorption tower in which a novel polymer-based composite material is filled; and (c) stopping adsorption in the case that the concentration of fluorine ions in effluent achieves a leakage point, performing adsorption regeneration on the novel polymer-based composite material in the adsorption tower by virtue of a NaOH-NaCl mixed solution, and then standing for recycling after regeneration. According to the invention, the pre-concentration effect of a polymer substrate and the selective fluorine removal performance of nanometre zirconia hydrate are organically combined, thus the adsorption capacity and the selectivity of the material on fluorine ions are effectively improved.
Owner:NANJING UNIV

Preparation method of multi-taste Maotai-flavor white spirit

ActiveCN102453651ALong aftertastePerfect display of personality styleAlcoholic beverage preparationFlavorWhite spirit
The invention discloses a preparation method of multi-taste Maotai-flavor white spirit. Eleven flavor types of white spirits are taken as seasoning liquors, the preparation method is characterized by comprising the following steps of: finishing and soaking grains; cooking, gelatinizing and mixing with Luzhou-flavor white spirit fermented grains and Maotai-flavor white spirit fermented grains; spreading out and airing, stirring distiller's yeast, adding Maotai-flavor ending liquor, Luzhou-flavor yellow wine, Maotai-flavor fermented grains and Maotai-flavor yeast, and accumulating and fermenting; fermenting in a cellar, and spraying mixed solution of the Maotai-flavor ending liquor and the Luzhou-flavor yellow wine on the surface of each distilled grain layer; making sand and adding the Luzhou-flavor white spirit fermented grains, cooking and gelatinizing, then adding the Maotai-flavor ending liquor, the Luzhou-flavor yellow wine, the Maotai-flavor fermented grains and the Maotai-flavoryeast, accumulating and fermenting, and storing in the cellar and spraying the mixed solution of the Maotai-flavor ending liquor and the Luzhou-flavor yellow wine on each distilled grain layer; steaming by using a rice steamer to obtain unblended wine in rounds of 1, 2, 3, 4, 5, 6 and 7, and the wine in the seven rounds are combined according to taste and-flavor characteristics, so as to obtain combined Maotai-flavor unblended wine; and then blending the combined unblended wine with flavoring liquor, thus obtaining the multi-taste Maotai-flavor white spirit. The preparation method disclosed by the invention has the advantages of enriching-flavor of Maotai-flavor white spirit, meeting market demand and promoting development of the Maotai-flavor white spirit.
Owner:SICHUAN TUOPAI SHEDE WINE

Underwater super-oleophobic oil-water separation mesh membrane and preparation method thereof

The invention discloses an underwater super-oleophobic oil-water separation mesh membrane and a preparation method thereof. The oil-water separation mesh membrane is prepared by coating a micron-thickness chitosan-based polymer coating layer on the mesh wire of a fabric mesh with 100-400 meshes. The oil-water separation mesh membrane is provided with micrometer-scale meshes and the chitosan-based polymer coating layer is provided with protruding structures with a nanoscale width. The preparation method of the oil-water separation mesh membrane comprises the following steps of: (1) cleaning and drying the fabric mesh; (2) dissolving a chitosan-based polymer in acid solution and stirring evenly to obtain mixed solution; (3) immersing the cleaned and dried fabric mesh in the mixed solution, taking out and drying the fabric mesh; and (4) immersing the fabric mesh obtained by the step (3) in alkaline solution, taking out and drying the fabric mesh to obtain the oil-water separation mesh membrane. The oil-water separation mesh membrane provided by the invention has the advantages of large water flux, high oil-water separation speed and good oil-water separation effect, is applicable to treatment of sewage with high oil content, and has good separation effect on normal hexane, petroleum ether, dichloroethane, benzene, animal and vegetable oils and the like.
Owner:TSINGHUA UNIV

Microfluidic device and method for preparing microgel by using microfluidic device

The invention provides a microfluidic device and a method for preparing microgel by using the microfluidic device. The method comprises the steps of (1) taking a solution containing live cells or bioactive molecules, a photocuring agent and a hydrogel prepolymer as an internal phase, taking a mixed solution containing oil and an surfactant as an intermediate phase, and taking a polyvinyl alcohol aqueous solution as an external phase; (2) respectively conveying the internal phase, the intermediate phase and the external phase into a corresponding microchannel of the microfluidic device through a micro pump or a micro injector to form a monodispersed water-in-oil-in-water double emulsion; (3) enabling the monodispersed water-in-oil-in-water double emulsion in the step (2) to pass through an output channel of the microfluidic device, and collecting the monodispersed water-in-oil-in-water double emulsion in the step (2) into a collection vessel filled with an aqueous solution, thus obtaining the microgel immobilizing with the live cells or the bioactive molecules. The preparation of the microgel immobilizing with cells by a one-step method is realized, the obtained microgel is controllable in size, and narrow in size distribution, and meanwhile the survival rate of cells is maintained.
Owner:SHENZHEN HUA NOVA BIOTECH LTD
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