278results about How to "Non-deterministic" patented technology

The invention discloses an industrial application of an MVR (mechanical vapor recompression) crystallizing evaporator technology in the production of sodium sulfate and sodium chloride in Huaian, Jiangsu, and relates to an improvement of a salt and sodium sulfate coproduction evaporation technology, belonging to the technical field of chemical three-waste treatment and utilization, and in particular to an application of an MVR crystallizing evaporator in a sodium sulfate and sodium chloride separation technology. The application is mainly technically characterized in that sodium sulfate liquid is concentrated by the MVR crystallizing evaporator, the sodium sulfate is produced at high temperature, and the sodium chloride is produced at low temperature. According to the invention, the mechanical re-compressed vapor is evaporated, concentrated and crystallized at 90-100 DEG C to obtain sodium sulfate, and the re-compressed vapor at a low temperature of 55 DEG C is concentrated and crystallized to obtain sodium chloride. According to the invention, the application of the MVR technology to the concentration of sodium sulfate liquid is realized, the sodium sulfate is produced at high temperature, and sodium chloride is produced at low temperature. The application disclosed by the invention is an environmental protection project which saves energy, reduces emission and avoids waste gas, waste water and waste residue.

The invention discloses amphiphobic fluoro-containing crosslinkable block copolymer and a preparation method and application thereof. The block copolymer can be used for preparing a super-amphiphobic coating on the surface of glass or printing paper, and the super-amphiphobic coating is prepared by the following steps of: (1) putting silica nano spheres into benzotrifluoride to obtain solution ofsilica nano spheres; (2) adding solution of amphiphobic fluoro-containing crosslinkable block copolymer, tetrahydrofuran, hydochloric acid solution and water into the solution of silica nano spheres,and reacting for 7 to 12 hours to obtain a crude product of modified silica nano spheres; (3) washing the crude product of modified silica nano spheres to obtain modified silica nano spheres; and (4)dispersing the modified silica nano spheres into the benzotrifluoride to obtain solution, dripping the solution onto a glass sheet, and after the solvent is volatilized, forming the super-amphiphobiccoating on the surface of the glass sheet, or soaking the printing paper in the solution, taking the paper out, and drying the paper to obtain the super-amphiphobic coating on the surface of the paper. The amphiphobic fluoro-containing crosslinkable block copolymer can endow a material with good superhydrophobic and oleophobic properties; and the coating has high stability and hardly falls off and denatures.

The invention relates to a method for detecting trace ochratoxin A by adopting an electrochemical aptamer sensor, and belongs to the technical field of electrochemical sensors. The method comprises the following steps: firstly, the DNA modification is performed on a gold electrode; then an aptamer is assembled through the complementary base pairing effect so as to capture labeled DNA of gold nanoparticles; the DNA rich in G is assembled on the surfaces of the gold nanoparticles so as to capture a great quantity of methylene blue (MB) to build a signal amplification strategy; finally, a series of OTA standard solutions is detected by taking differential pulse voltammetry scanning as the detection means so as to obtain the response relation between the reductive peak current of MB and the concentration of OTA, and a standard curve is drawn. The invention aims to provide a preparation method of an aptamer sensor, which is simple in operation, high in sensitivity and strong in specificity and is used for sensitivity detection of trace OTA.

The invention relates to a method for preparing flake porous ZnO nano powder, which comprises the following steps: adding ammonia into solution of zinc nitrate dropwise, and adjusting the pH of the solution to between 6 and 8; under the condition of stirring by magnetic force at the rotating speed of 0 to 180r/m, performing reaction at the temperature of between 0 and 80DEG C for 0.5 to 3 hours; separating, washing and drying the obtained cloudy solution to obtain a crosslinked flake and dispersed flake basic zinc nitrate precursor; and calcinating the basic zinc nitrate precursor with the two appearances at the temperature of between 220 and 500DEG C for 0.5 and 3 hours to obtain the flake porous ZnO nano powder. The nano ZnO product prepared by the method is white powder, belongs to a hexagonal system, has large specific surface area, high purity and good product quality, and responds to gas such as ethanol and acetone sensitively.

The invention discloses a preparation method for a stannic disulfide/graphene nanocomposite, a negative electrode of a lithium ion battery, and the lithium ion battery. The preparation method comprises the following steps of performing a hydrothermal process and a compounding process. By adoption of the preparation method, the stannic disulfide is subjected to direct in-situ growth on the surface of graphene; then the obtained stannic disulfide is washed and dried to obtain the sheet-shaped stannic disulfide/graphene nanocomposite; the material is applied to the negative electrode material of the lithium ion battery; the stability and the conductivity of the material are effectively improved; the performance of the battery is improved; and the stannic disulfide/graphene nanocomposite has the advantages of high cycling stability, high specific energy density and the like.

Disclosed is a method for separating soybean protein and fat by the reversed micellar extraction, which comprises the following procedures: (1) reversed micellar solution is prepared; (2)a pretreated raw material of soybean is added into the reversed micellar solution to extract protein and fat; (3) electrolyte solution is added so that the protein is transferred into the aqueous phase from the reversed micellar solution to be separated, thereby realizing back extraction of the protein, and protein aqueous solution and mixed oil are obtained; (4) the obtained protein product and the fat product are processed. The method has the following main advantages: the fat and the protein are separated at the same time in the reversed micellar extraction system, so the production process is greatly simplified, and the production cost and the investment on the fixed assets are reduced; the method has the advantages of solvent extraction; in the process of extraction, the protein is surrounded by the water environment in the reversed micellar, and the environment is close to the environment in the cells with mild condition, so the protein is not denatured and can keep the biological activity of the protein, and the purity of the product is high; and no acid and alkali wastewater is discharged without pollution.

The invention discloses a sea-urchin-shaped nanometer nickel silicate hollow sphere and a preparation method thereof. An appropriate quantity of silicon dioxide spherules and an appropriate amount of urea, soluble nickel salt and deionized water are added into a hydrothermal reaction kettle core, react for certain time inside a drying oven at the constant temperature of 80-150 DEG C and then are naturally cooled to indoor temperature; the prepared product is subjected to centrifugal washing and drying, an appropriate quantity of NaOH solutions and the product are together added into a hydrothermal reaction kettle and placed at the constant temperature of 100-200 DEG C to be subjected to hydrothermal reaction for certain time, and the product is subjected to centrifugal washing and drying and then calcined at certain temperature to prepare the sea-urchin-shaped nanometer nickel silicate hollow sphere. The prepared nickel silicate hollow sphere is tested by an X-ray diffractometer, a scanning electron microscope and a transmission electron microscope and is in a sea urchin shape, the wall of the sphere is quite thin, the specific surface area is large, particle size distribution is even, and the nickel silicate hollow sphere can serve as a material for manufacturing an electrochromic device and an electrode material for manufacturing a super capacitor.

The invention provides a mechanical steam recompression falling film evaporation process method comprising the following specific steps: (1) high-salt wastewater pretreatment is carried out, wherein a material is delivered into a preheater through a feeding pump; condensate water of falling film evaporator secondary steam condensation is adopted as a heat source of the preheater, and the material is preheated; the preheated material is delivered into a liquid mixing device, and is mixed with liquid from an evaporation chamber of the falling film evaporator; and the mixture is delivered into the falling film evaporator; (2) a falling film evaporation system is established, wherein after the material enters the falling film evaporator, with indirect heating of evaporator shell-side steam, the material absorbs heat and the temperature is increased; the material enters the evaporation chamber; with the negative pressure in the evaporation chamber, the material is instantly evaporated, and most of water is converted into secondary steam and is discharged from a secondary steam outlet; and (3) a steam compression recycling system is established, wherein secondary steam from the evaporation chamber enters a steam compressor; with the compression of the steam compressor, steam pressure and temperature are both increased; and the steam is returned to the shell-side of the falling film evaporator again and is reused.

The invention discloses a method for preparing a nickel sulfide/graphene nanocomposite, a lithium ion battery cathode and a lithium ion battery. The preparation method comprises a hydrothermal process and a compounding process. According to the preparation method, nickel sulfide is compounded on graphene, and a black nickel sulfide and graphene composite is obtained through washing and drying. The composite has a very large specific surface area, and the dropping between nickel sulfide and graphene is effectively avoided in the lithiation process; what is most important, the agglomeration problem of graphene and nickel sulfide nano particles is solved to a large extent, the shortcomings of poor stability and poor electrical conductivity and the like are overcome well, and thus the goal of improving battery performances is achieved. The nanocomposite is applied to a lithium ion battery cathode material and has the advantages of good cycle stability and high specific energy density and the like.

The invention discloses a preparing method of soybean isoflavone aglycone, which comprises the following steps: (1) adding acetone boiling point reflux into soybean molasses; filtering; evaporating the filtering liquid to dryness; getting solid; (2) adding acetic ester boiling point into the solid; filtering; adding acetone boiling point reflux into filtering liquid; filtering; drying the solid material; getting soybean isoflavone glycoside; (3) diluting the soybean isoflavone glycoside with distilled water; adding into beta-glucosidase; hydrolyzing; getting soybean isoflavone aglycone. This invention increase the added value of soybean molasses, which possesses high stability and little byproduct.

The invention provides a preparation method of a composite nylon material. The preparation method comprises the following steps: I. adding natural polysaccharide into an acetic acid water solution, heating to be completely gelatinized, to obtain a mixture I; II, adding an emulsifier and a plasticizer into the mixture I, heating and stirring, to obtain a mixture II; III, then adding natural functional materials into water, stirring to be completely dissolved, to prepare a natural functional material water solution; IV. cooling the mixture II to 50DEG C, adding protein, performing water bath heating and stirring, to obtain a mixture III; V, mixing the mixture III with the natural functional material water solution, to obtain a mixture IV; VI, pouring the mixture IV into a mould, drying and forming a film; and VII, cooling the film obtained in the step VI to be at normal temperature. The preparation method is simple, the production cost is low, the formed preservative film has the characteristics of being non-toxic and harmless, and good in moisture barrier property, so that the preservation effect of food can be effectively enhanced.

The invention provides a method for producing a fluorescence resonance energy transfer sensor and rapidly detecting CaMV35S. The method comprises the following steps: 1, preparing a nitrogen-doped graphene quantum dot (NGQDs) solution; 2, preparing a silver nanoparticle (AgNPs) dispersion; 3, preparing a nitrogen-doped graphene quantum dot-probe1 (NGQDs-probe1) dispersion; 4, preparing a silver nanoparticle-probe2 (AgNPs-probe2) dispersion; 5, constructing the fluorescence resonance energy transfer sensor; and 6, detecting the target DNA of CaMV35S, and establishing a standard curve. The sensor is produced based on the DNA complementary pairing hybridization specification, so compared with sensors produced based on immunoreaction, the method provided by the invention has the characteristics of strong binding force with target molecules, high specificity, difficult degeneration after long-time exposure, and low requirements for surrounding environment.