30results about How to "Easy to realize industrial scale-up production" patented technology

The invention discloses a preparation method of titanium dioxide fibers with a photocatalysis function and a polycrystalline nanostructure. The preparation method comprises the following steps: respectively diluting titanium tetrachloride and potassium acetate, which are taken as raw materials, in ethanol, mixing at 0-10 DEG C under the condition of stirring to generate titanium acetate and potassium chloride, filtering to remove potassium chloride by taking advantage of the property that potassium chloride is insoluble to ethanol so as to acquire filtrate of ethanol in which titanium acetateis dissolved, concentrating the filtrate to obtain a titanium acetate sol spinning solution, centrifuging and spinning to obtain precursor fibers, and performing steam activation thermal treatment toobtain the titanium dioxide fibers. The preparation method disclosed by the invention has the advantages of lower raw material cost, simpler sol production process and pollution-free preparation process.

The invention discloses an extraction method for microalgae grease. The method comprises the following steps: (1) preparation of a sample: a step of collecting microalgae cells through centrifugation and then carrying out freeze drying so as to obtain dry microalgae powder; (2) ultrasonic pretreatment: a step of mixing the dry microalgae powder with alcohol and carrying out ultrasonic treatment; and (3) Soxhlet extraction: a step of adding a material obtained after treatment in step (2) into a Soxhlet extractor, carrying out extraction in a boiling water bath for 3.5 h and then carrying out filtration, separation and reduced pressure concentration so as to obtain the microalgae grease. The method provided by the invention can obviously improve preparation processes for the microalgae grease, is beneficial for realization of industrial production and can speed up preparation, development and utilization of the microalgae grease.

The invention discloses a method for synthesizing a metal-modified SAPO-34 molecular sieve. The method comprises the following steps: preparing a metal salt into an aqueous solution; adding an aluminum source to be stirred uniformly; then, filtering, washing, drying, calcining at a low temperature, and then re-dispersing in a small amount of water; sequentially adding a phosphorus source, a silicon source and a template agent; stirring to form a gel mixture; and ageing, crystallizing, washing, drying and calcining to prepare the metal-modified SAPO-34 molecular sieve. The metal-modified SAPO-34 molecular sieve prepared in the invention has relatively high crystallinity, shows high low-carbon olefin selectivity when use for catalyzing reaction of preparing olefin from methanol, has the advantages of high ethylene selectivity, yield, low synthesis costs and easy industrial large-scale production.

The invention discloses a preparation method for a high dispersibility Cu based cerium oxide composite catalyst. The preparation method mainly comprises the following steps that (1) a cerium nitrate solution and a 2-methylimidazole solution are prepared separately, the 2-methylimidazole solution is poured into the cerium nitrate solution in the stirring process, and stirring is stopped till the solutions are mixed uniformly; (2) centrifugal separation is conducted, and washing and drying are conducted to obtain a precursor; (3) the precursor obtained in the step (2) and copper salt are ground, methyl alcohol serves as a solvent and volatilizes gradually in the grinding process to form a high dispersibility Cu-based cerium oxide composite catalyst precursor, and the content of Cu in the composite catalyst precursor is, by mass, 0.5-20%; and (4) the composite catalyst precursor is calcined at the atmosphere of H2-Ar mixed gas, and the high dispersibility Cu based cerium oxide composite catalyst is obtained. The composite catalyst prepared through the preparation method has good heat stability, the large specific surface area and the plentiful pore structure, and the composite catalyst has the characteristic of high dispersibility.

The invention discloses a technique for pretreatment and extraction of capsaicine with micro wave. Small red chilli of which the producing area is Chengdu in Sichuan is used as raw material, and the technique comprises the steps of baking and crushing the red chilli, and sieving with a 40-mesh standard sieve after removing seeds of the small red chilli to obtain dried chilli powder; adding acetone to the dried chilli powder; carrying out pre-treatment with micro wave; adding the pre-treated material into a soxhlet extractor, extracting for 3 hours at 50 DEG C, filtering, separating and concentrating under reduced pressure to obtain capsicum oleoresin; adding alcohol to the capsicum oleoresin for extracting to capsaicine resin; adding a sodium hydroxide aqueous solution to the capsaicine resin, adding normal hexane, and then adjusting the pH value to 3 with hydrochloric acid, and carrying out centrifugal separation, concentrating under reduced pressure, and drying to obtain the capsaicine product. The technique disclosed by the invention is easy to achieve industrial amplification production, and the prepared capsaicine product has the characteristics of fast extraction speed, high product purity and the like.

The invention discloses a microalgae compound living body bait used for raising fishes and a production method thereof. The microalgae compound living body bait is formed by microalgae algae liquid obtained by cultivating following microalgae seeds and mixing according to a cell quantity ratio: 10%-15% of chaetoceros muelleri, 15%-20% of phaeodactylum tricornutum bohlin, 10%-15% of isochrysis galbana parke, 10%-15% of haematococcus pluvialis, 30%-35% of chlorella pyrenoidosa and 15%-20% of pavlova viridis; and the total density is 1.2*10<5>-5.8*10<5> cells / millimeter. The production method comprises the following steps: (1) cultivating the microalgae seeds by using a photobioreactor to obtain the microalgae algae liquid with the cultivation density of 1.1*10<9>-5.6*10<10> cells / millimeter; and (2) preparing the microalgae compound living body bait from the microalgae algae liquid according to the cell quantity ratio to obtain the microalgae compound living body bait with the total density of 1.2*10<5>-5.8*10<5> cells / millimeter. According to the microalgae compound living body bait, the plurality of types of microalgae cells are prepared into the microalgae compound living body bait and the nutrition is balanced; and the survival rate of raising the fishes can be improved and the morbidity can be reduced.

The invention discloses a method for preparing a polyacrylonitrile antibacterial fiber. The method comprises the following steps: firstly, adding polyacrylonitrile fiber into an alcoholic-alkaline solution, performing surface treatment, and subsequently adding an organic amine solution for chemical modification so as to obtain a modified polyacrylonitrile fiber; secondly, adding the modified polyacrylonitrile fiber into an organism solution containing multiple aldehyde groups so as to obtain aminated fiber containing aldehyde groups; finally, soaking the fiber into a silver nitrate solution, washing, and drying, thereby obtaining the polyacrylonitrile antibacterial fiber. The polyacrylonitrile antibacterial fiber prepared by the method is excellent in antibacterial property and good in washablity, and antibacterial components have low probability of dropping off; meanwhile, the method is smart in idea, simple in production process and very good in industrial production property, and the polyacrylonitrile antibacterial fiber can be used as an antibacterial filter for sterilization of air and water bodies, and meanwhile has wide application prospects in clothing textiles and medical sterilization products.

The invention discloses a high-dispersity composition of low-dose drugs and a preparation method of the high-dispersity composition, aiming to solve the problem that existing preparation methods for the low-dose drugs cannot meet requirements on content uniformity and influences of parameter change amplification in the production process on physicochemical properties of the low-dose drugs are remarkable. The high-dispersity composition and the preparation method thereof have the advantages that the low-dose drugs are prepared by the twin-screw extrusion technology for the first time; Vitamin Danalogue drugs, glucocorticoid drugs, antipsychotics, antipyretic and analgesic drugs and other low-dose drugs are screened as research objects; preparation of solid preparations through a twin-screwextruder is studied deeply; the content uniformity meets requirements of the pharmacopeia.

The process for extracting chlorophyll from silkworm faeces assisted by microwave belongs to the field of combination of chemical technology and electronic technology. The extraction process comprises using cell disruption aid as wetting agent of silkworm faeces and microwave energy receptor, pretreating silkworm faeces by microwave radiation; then, adding solvent, and extracting at some temperature to get chlorophyll. The result shows that the extraction rate of chlorophyll in silkworm faeces treated by microwave is higher than that by traditional method, and the extraction time is reduced obviously.

The invention discloses a Cu-Zn-based catalyst used in a reverse water gas shift reaction for catalyzing CO2 hydrogenation conversion for producing CO, and a preparation method thereof and an application thereof. The Cu-Zn-based catalyst has a structural formula of CuaZnbMc. M is one or a combination of more than one selected from transition metal elements, alkali metal, alkaline earth metal or rare earth; a, b, and c are respectively molar fractions of Cu, Zn, and M; a is in the range of 40-60%, b is in the range of 30-60%, and c is in the range of 0-10%. The Cu-Zn-based catalyst provided by the invention has the advantages of low cost, simple preparation method, stable performance, and suitability for industrial large-scale production. Under low temperature, the catalyst has high reaction activity and high CO selectivity, and can be used in the reverse water gas shift reaction for synthesizing CO, such that CO2 emission rate can be reduced. The catalyst can also be used in coupling with a CO hydrogenation catalyst, such that products such as hydrocarbons low-carbon alcohols and high-carbon alcohols with high added values can be produced. The catalyst has good industrial application prospect.

The application discloses a preparation method of a surface-functionalized molybdenum carbide-carbon catalyst for a carbon dioxide hydrogenation reaction. The preparation method mainly comprises the following steps: firstly, using deionized water as a solvent, uniformly mixing sodium alginate with an ammonium molybdate solution, and then putting a mixed solution into a freeze drying oven for carrying out freeze drying; secondly, carrying out high-temperature roasting in an inert atmosphere to obtain porous graphite carbon-inlaid high-dispersibility molybdenum carbide; thirdly, mechanically lapping the prepared porous graphite carbon-inlaid high-dispersibility molybdenum carbide and urea, putting a lapped material into a muffle furnace, and carrying out annealing treatment to obtain the surface-functionalized molybdenum carbide-carbon catalyst. The catalyst prepared by the preparation method has the characteristics of large specific surface area, abundant pore structures and high dispersibility, and shows good catalytic activity and selectivity in the carbon dioxide hydrogenation reaction.

The invention discloses a microalgae composite living bait for fish seedlings and a production method thereof. The microalgae composite living bait is composed of microalgae liquid mixed according to the number of cells after the following microalgae species are cultivated: Chaetoceros mourii 10%~15%, Phaeodactylum tricornutum 15%~20%, Isochrysis globosa 10%~15%, Haematococcus pluvialis 10%~15%, Chlorella pyrenoidosa 30% ~35% and Pavlova 15%~20%, and the total density is 1.2×105~5.8×105 cells / mL. The production method is as follows: (1) use the photobioreactor to culture the microalgae and algae species separately, and obtain the microalgae liquid with a culture density of 1.1×109~5.6×1010 cells / mL; (2) the microalgae liquid The microalgae composite living bait is formulated according to the ratio of the number of cells, and the microalgae composite living bait with a total density of 1.2×105-5.8×105 cells / mL is obtained. In the present application, a variety of microalgae cells are made into compound living bait, which has balanced nutrition, can improve the survival rate of fish seedlings, and reduce the incidence of the disease.

The invention discloses a pre-lithium negative electrode material, a preparation method thereof, a pre-lithium negative electrode and a pre-lithium battery. The method comprises: 1) dispersing the negative electrode active material and metal lithium in an organic solvent to obtain a mixed solution; 2) using the mixed solution to carry out hydrothermal reaction to obtain a pre-lithium negative electrode material. The present invention utilizes a hydrothermal high-temperature and high-pressure environment to fully and evenly embed lithium metal into the structure of negative electrode active materials such as graphite materials, and has a good pre-lithium effect. Using the pre-lithium negative electrode material as a negative electrode active material for lithium-ion batteries can Effectively reduce the consumption of active lithium ions in the positive electrode and improve the electrochemical performance of the negative electrode, especially the first Coulombic efficiency.

The invention discloses a vitamin D analog preparation and a preparation method thereof. In order to solve the defects in the existing methods of preparing vitamin D analog drugs, which are difficult to meet the requirements of content uniformity, and the drug is easy to degrade and transform during the granulation process, the twin-screw extrusion technology is used for the first time to prepare vitamin D analogs. solid preparations. On the basis of extensively using various vitamin D analogues as model drugs and in-depth research on the preparation process of their solid preparations, alfacalcidol, idecalcitol or calcitriol are preferably processed through a twin-screw extruder. The solid preparation is prepared, and its content uniformity meets the requirements of the Pharmacopoeia, the stability of the drug is significantly improved, and the quality of the drug is greatly improved.

The invention discloses a preparation method of titanium dioxide fibers with a photocatalysis function and a polycrystalline nanostructure. The preparation method comprises the following steps: respectively diluting titanium tetrachloride and potassium acetate, which are taken as raw materials, in ethanol, mixing at 0-10 DEG C under the condition of stirring to generate titanium acetate and potassium chloride, filtering to remove potassium chloride by taking advantage of the property that potassium chloride is insoluble to ethanol so as to acquire filtrate of ethanol in which titanium acetateis dissolved, concentrating the filtrate to obtain a titanium acetate sol spinning solution, centrifuging and spinning to obtain precursor fibers, and performing steam activation thermal treatment toobtain the titanium dioxide fibers. The preparation method disclosed by the invention has the advantages of lower raw material cost, simpler sol production process and pollution-free preparation process.

The invention provides a carbon dioxide hydrogenation synthesis formic acid catalyst and its preparation method and application, which belong to the technical field of catalyst synthesis and fine chemical industry. The Pd-based metal material catalyst provided by the present invention has the advantages of high dispersion of active metals, adjustable structure and properties on the atomic scale, and can realize the process of formic acid hydrogenation of carbon dioxide at normal temperature and pressure in terms of catalytic effect, and is expected to solve the problem of heterogeneous catalysts. The problem of low efficiency of catalytic conversion of carbon dioxide to formic acid under mild conditions provides a successful example for the capture and conversion of carbon dioxide at normal temperature and pressure, and the preparation method adopted in the present invention is simple and the production cost is low, so it has good practical application value.

The invention discloses a method for replenishing lithium in a lithium ion battery through a positive electrode. The method includes: 1) On both sides of the positive electrode current collector, the positive electrode slurry and the passivated lithium powder slurry are sequentially coated, dried, and rolled, and the positive electrode sheet material layer is sequentially formed on both sides of the surface of the positive electrode current collector and a passivated lithium layer to obtain a positive electrode precursor sheet; 2) process the positive electrode precursor sheet with a nitrogen gas flow, and the nitrogen reacts with the passivated lithium layer on the surface to form a positive electrode sheet; 3) assemble the positive electrode sheet The battery cell is assembled to obtain the battery, which is charged and discharged to realize the lithium replenishment of the battery. The pre-lithiated positive electrode material of the present invention can be produced under conventional process procedures and conventional temperature and humidity, and is easy to realize industrial scale-up production.

A uniform precipitation-supercritical carbon dioxide drying method for preparing nano magnesium oxide belongs to the technical field of nano material preparation. The main content is to prepare magnesium hydroxide precipitation by uniform precipitation method in aqueous solution, replace the water in the precipitation with ethanol, and then use supercritical CO 2 The ethanol in the precipitate is removed by drying, and the ethanol is separated and recovered through the separator, and the CO 2 Can be recycled. The dried magnesium hydroxide is calcined at high temperature to obtain nano-sized MgO powder. The method solves the problem of agglomeration during drying of the prepared nano-powder, and has a simple operation process and is easy to realize industrialization. Nano-magnesium oxide has broad application prospects in ceramics, enamel, medicine, cosmetics, paint, paper and aviation, military, quantum devices, microelectronics and other fields.

The invention provides a fenofibrate nano freeze-dried composition and a preparation method thereof. The preparation method comprises: preparing a nano-suspension, and freeze-drying the suspension. The preparation method provided by the present invention does not need to micronize the raw material drug in advance, which greatly reduces the energy consumption required for the experiment; the experimental conditions of the present invention are mild and controllable, the preparation time is short, and the production cycle is greatly shortened; there is no need to use high-pressure homogenization or Methods such as mechanical grinding have low requirements on equipment, low energy consumption, and are not prone to debris pollution; they are simple to operate, have good reproducibility, low cost, and are easy to realize industrial scale-up production. In the nanosuspension prepared by the invention, the particle size of the drug nanoparticles in the suspension is controlled at 150-350nm, the dissolution and release are fast, the gastrointestinal transmembrane transport capacity of fenofibrate is greatly improved, and the absorption of fenofibrate is promoted. .

A method for synthesizing a metal-modified SAPO-34 molecular sieve is to prepare a metal salt into an aqueous solution, add an aluminum source, stir evenly, filter, wash, dry, and roast at a low temperature, and then re-disperse in a small amount of water, and then sequentially add a phosphorus source and a silicon The source and template are stirred to form a gel mixture, which is prepared by aging, crystallization, washing, drying, and calcination. The metal-modified SAPO-34 molecular sieve prepared by the invention has high crystallinity, and when used for catalyzing the methanol-to-olefin reaction, it exhibits high low-carbon olefin selectivity, high ethylene selectivity, and high molecular sieve yield. The advantages of low cost and easy industrial scale-up production.

The invention discloses a microalgae composite living bait for raising shellfish seedlings and a production method thereof. The microalgae composite living bait is composed of the following microalgae species cultured and mixed in proportion to the number of cells: Chaetoceros mourii 15%‑20%, Coccolithia 20%‑25%, Isochrysis globosa 5%‑10%, Haematococcus pluvialis 15%‑20%, Chlorella pyrenoidosa 25%‑ 30% and P. subcordiformis 10%‑15%, with a total density of 1×105‑5×105 cells / mL. The production method is as follows: (1) use a photobioreactor to culture the microalgae species separately to obtain a microalgae liquid with a culture density of 1×109-5×1010 cells / mL; (2) prepare the microalgae liquid The microalgae composite living bait is formulated according to the ratio of the number of cells, and the microalgae composite living bait with a total density of 1×105-5×105 cells / mL is obtained. In the present application, a variety of microalgae cells are made into compound living bait, which has balanced nutrition, can effectively improve the survival rate of shellfish seedlings, and reduce the incidence rate thereof.

The invention discloses a method for preparing monodisperse emulsion and belongs to the technical field of emulsion. The monodisperse emulsion is prepared by using a tube-in-tube annular channel reactor; a continuous phase is introduced into an outer tube of the tube-in-tube annular channel reactor, a disperse phase is introduced into an inner tube of the tube-in-tube annular channel reactor, and the continuous phase and the disperse phase fully contact on micropore parts to form the emulsion; and according to the method, equipment is simple, cost is low, flux is high, and continuous operation can be realized, so that the preparation cycle can be greatly shortened, and production efficiency is improved. The emulsion prepared by the method is high in quality, stable in performance, and high dispersibility; and emulsion droplets are uniform in particle size.