24results about How to "Preparation method is stable" patented technology

The invention discloses a machining method for a thin-wall diffuser of a supercharger. The manufacturing quality is stable and reliable. Comprising 10 procedures: heat treatment; 20, roughly turning a large end; 30, roughly turning a small end; 40, semi-finish turning is conducted on the outer circle, the inner hole and the end face of the large end; 50, semi-finish turning is conducted on the outer circle, the inner hole and the end face of the small-end step; 60, scribing, namely scribing a vertical center line on the small end face and leading the vertical center line to the outer circle of the large end; 70, drilling and milling each hole, and reserving allowance; 80, the large end face is subjected to semi-finish turning, and the flatness is guaranteed to be 0.05; 90, roughly milling the blade and the runner; 100 working procedure: heat treatment for destressing; 110, the large end face is subjected to finish turning; 120, the small end face is subjected to finish turning; 130, the large end face is subjected to finish turning, and the flatness is guaranteed to be 0.03; 140, drilling and milling each hole in place after aligning and scribing; 150, finish milling of the blade and the flow channel; 160, a large outer circle is subjected to finish turning.

The invention relates to a preparation method and application of a non-noble metal water electrolysis oxygen production catalyst, NiFeCo, NiFeMo and NiFe are fully mixed and grown in a pipeline through a microchannel reactor (MCR), a liquid phase is removed, and after separation and drying, powder particles are obtained and directly used as an electro-catalytic material to be applied to a water electrolysis anode oxygen evolution catalyst. In the current background, an AEM water electrolysis technology becomes a research hotspot of a clean energy conversion technology. The performance of an anode catalyst is crucial to the electrolytic hydrogen production efficiency and the cost. A traditional noble metal catalyst is expensive, and application is limited. The invention provides the efficient, stable and low-cost synthesis method of the non-noble metal water electrolysis oxygen production catalyst, the transition metal composite oxide is synthesized in the micro-channel reactor through the simple preparation method, and meanwhile, the synthesis method is simple, continuous preparation can be realized, and the method is suitable for industrial production.

The invention discloses a preparation method of cyclic ether. The preparation method comprises the following steps: carrying out contact reaction on ethylene glycol and a catalyst to obtain 1, 4-dioxane; the catalyst is a phosphorus-modified hierarchical pore H-type molecular sieve. The catalyst provided by the invention is applied to a reaction for preparing 1, 4-dioxane through an ethylene glycol dehydration reaction, so that the conversion rate of ethylene glycol and the selectivity of the generated 1, 4-dioxane are improved.

The invention discloses a nanosheet oil-displacing agent and preparation and application thereof.The interfacial tension of the nanosheet oil-displacing agent ranges from 0.27 mN / m to 4.21 mN / m. A preparation method of the nanosheet oil-displacing agent comprises the steps that S1, sodium octadecyl benzene sulfonate is dissolved with methyl alcohol to react with formaldehyde, and an auxiliary agent is obtained; s2, dispersing an auxiliary agent and a magnesium source in deionized water to form a dispersion liquid, adjusting the pH value of the dispersion liquid to be alkalescent, then adding a precipitator for reaction, and performing purification and drying treatment to obtain a flaky magnesium hydroxide nano material; s3, carrying out a reaction on the flaky magnesium hydroxide nano material and 3-aminopropyltriethoxysilane, and carrying out purification and drying treatment, so as to obtain a flaky silane modified magnesium hydroxide nano material; and S4, mixing the flaky silane modified magnesium hydroxide nano material with water, and adding an ampholytic surfactant to obtain the nanosheet oil-displacing agent. The method disclosed by the invention is simple and low in production cost, and the prepared nanosheet oil-displacing agent can effectively reduce the oil-water interfacial tension so as to improve the crude oil recovery rate.

The invention provides a toad skin extract, a traditional Chinese medicine composition, a traditional Chinese medicine gel ointment, a preparation method and application, and belongs to the technical field of traditional Chinese medicine extraction and traditional Chinese medicine preparations. The preparation method of the toad skin extract comprises the following steps: mixing dried toad skin with an ethanol solution, performing reflux extraction to obtain a toad skin extracting solution, performing centrifugation to obtain supernate, and performing concentration and drying to obtain the toad skin extract. According to the preparation method, the content of bufalin, cinobufagin, resibufogenin and indole alkaloid extracted from the toad skin is increased, the preparation method is stable and feasible, and the prepared toad skin extract can inhibit bacteria. The traditional Chinese medicine gel ointment is easy to coat, smooth and bright in ointment body, good in skin following performance and uncovering and pasting performance, free of residues in stripping, good in adhesiveness, excellent in overall quality and good in reproducibility, has the effects of diminishing swelling and treating acne, is free of acute toxicity, does not cause the conditions of skin erythema and edema, is free of irritation to skin and is high in safety.

This invention relates to a method for manufacturing a polyacetal copolymer, comprising: a step of copolymerizing 100 parts by mass of trioxymethylene (A), 0.05 to 5 parts by mass of a cyclic acetal compound (B), and 0.001 to 1 parts by mass of an aliphatic glycidyl ether compound (C) with a chlorine content of 1 to 500 ppm by mass in the presence of a linear dimethoxymethane compound (D) as a molecular weight regulator; wherein in this step, when the total mass (g) of (A) to (C) is set as a, the number of moles of (D) is set as b, and the total number of moles of water and methanol contained in (A) to (C) are set as c and d respectively, the method is set to satisfy (b+c+d) / a = 1.5 to 7 μmol / g.

The present application relates to the technical field of mineral material microcharacterization, and in particular to a method for dispersing clay mineral monolayer suitable for transmission electron microscope observation. The method for dispersing clay mineral monolayer based on stage alcohol intercalation and exfoliation comprises the following steps: dispersing clay mineral in deionized water to obtain a clay mineral suspension system by stirring; adding small molecule alcohol to the suspension system first and then adding macromolecular alcohol, and stirring to obtain a dilute dispersion system; performing ultrasonic treatment to make the clay mineral form a dispersion system mainly in monolayer or few-layer structure; dropping onto a carrier film for transmission electron microscope to make the lamella spread on the surface of the carrier film; and observing by using a transmission electron microscope. The present application is conducive to obtaining clay mineral monolayer samples with good dispersion and complete structure, and is suitable for morphology and structure characterization under transmission electron microscope.

The invention relates to a preparation method of a fluorescent probe for detecting permanganate ions, which comprises the following steps: dissolving purslane powder and o-phenylenediamine (OPD) in ethanol, uniformly mixing, carrying out heating reaction, and cooling to room temperature to obtain a suspension; filtering and dialyzing the suspension to obtain a purified solution; carrying out rotary evaporation on the purified solution in a water bath to obtain a solute; and dissolving the solute in ultrapure water, and freeze-drying to obtain carbon quantum dot fluorescent probe powder. According to the invention, purslane is used as a precursor, o-phenylenediamine is used as a nitrogen doping agent, and the nitrogen-doped carbon nanodots (N-CDs) are synthesized through a solution heat reaction in ethanol. The obtained N-CDs shows excellent oxidation resistance, and shows excellent fluorescence stability under the conditions of extreme pH, salt concentration and continuous ultraviolet radiation. Meanwhile, the N-CDs have good selectivity on MnO4 <-> ions, the N-CDs and the MnO4 <-> ions are in a linear relation within the concentration range of 0.5-168 mu M, and the lowest detection limit reaches 41.8 nM.

The present invention discloses a method for preparing a titanium-based composite material with both high strength and toughness and 700°C service performance, comprising the following steps: step 1, according to the designed content of the reinforcing phase, calculate the content of each reinforcing powder in the added powder M in the raw material powder to determine the mass ratio of the TC25G alloy powder and each reinforcing powder; step 2, weigh the TC25G alloy powder and the added powder according to the designed mass ratio, and perform ball milling to mix the powders so that the powders are evenly mixed to obtain a composite powder; step 3, hot press sintering the obtained composite powder, and perform in-situ autogenous reaction to obtain a bulk composite material; step 4, hot extruding the obtained bulk composite material to obtain a titanium-based composite material with both room temperature strong plasticity and serviceability. The titanium-based composite material of the present invention significantly improves its high temperature performance above 700°C while ensuring that it has excellent room temperature strength-plasticity / toughness matching. The titanium-based composite material of the present invention can be used in aerospace vehicles.

The invention discloses an oral biomimetic mineralized oncolytic adenovirus, a preparation method thereof and an application of the oral biomimetic mineralized oncolytic adenovirus in preparation of antitumor drugs. The preparation method comprises the following steps: 1) culturing homologous tumor cells; 2) preparing a membrane extraction buffer solution; 3) preparing a homologous tumor cell membrane; 4) preparing the homologous tumor cell membrane coated oncolytic adenovirus particles; 5) preparing a suspension; (6) centrifuging the suspension; removing supernatant to obtain precipitate; (7) adding absolute ethyl alcohol into the precipitate, resuspending, and centrifuging; supernate is removed; and 8) repeating the step 7) to obtain the oral biomimetic mineralized oncolytic adenovirus. The mineralized shell of the product can help the oncolytic adenovirus to still have complete activity when the oncolytic adenovirus reaches the intestinal tract after oral administration, the oncolytic adenovirus is wrapped by a homologous tumor cell membrane, the tumor targeting property of the oncolytic adenovirus is improved, the anti-tumor effect of the oncolytic adenovirus is enhanced, and experiments prove that the product has a good application prospect. The oral biomimetic mineralized oncolytic adenovirus disclosed by the invention has an inhibition effect on human pancreatic cancer cells and human colon cancer cells.

The invention discloses a preparation method of 1, 4-dioxane, which comprises the following steps: carrying out contact reaction on ethylene glycol and a catalyst to obtain 1, 4-dioxane; the catalyst is SO4 < 2-> / HTaMoO6. The catalyst provided by the invention is applied to a reaction for preparing 1, 4-dioxane through an ethylene glycol dehydration reaction, so that the conversion rate of ethylene glycol and the selectivity of the generated 1, 4-dioxane are improved.

The invention discloses an ether preparation method which comprises the following steps: carrying out contact reaction on ethylene glycol and a catalyst to obtain diethylene glycol; the catalyst is modified cation exchange resin. The catalyst provided by the invention is applied to a reaction for preparing diethylene glycol through ethylene glycol dehydration reaction, so that the conversion rate of ethylene glycol and the selectivity of the generated diethylene glycol are improved.

The invention discloses a preparation method of diethylene glycol, which comprises the following steps: contacting ethylene glycol with a catalyst, and reacting to obtain the diethylene glycol, the catalyst is SO4 < 2-> / ZnFeO4-ZrO2 obtained by carrying out dipping treatment on ZnFeO4 of which the surface is loaded with ZrO2 through sulfuric acid. The catalyst provided by the invention is applied to a reaction for preparing diethylene glycol through ethylene glycol dehydration reaction, so that the conversion rate of ethylene glycol and the selectivity of the generated diethylene glycol are improved.

The invention belongs to the technical field of electronic components, and discloses a capacitive microfluid pressure sensor based on a polymer bonding technology and a manufacturing method thereof.The capacitive microfluid pressure sensor comprises a sensor body obtained by sequentially connecting an upper layer, a middle layer and a lower layer through polymer bonding layers, and the upper layer comprises a lead hole, a microchannel inlet and outlet and a first groove; the top of the middle layer is provided with a second groove communicated with the first groove, and the bottom is provided with an upper electrode lead groove; the polymer layer between the lower layer and the middle layer comprises a lower electrode, a strip and a lower electrode lead groove, and the upper layer lead hole, the middle layer lead hole and the lower layer lead hole are communicated. And the lower-layer lead hole penetrates from the middle layer to the lower layer. And a suspended part between the micro-channel and the groove of the lower electrode is used as a pressure sensing diaphragm. According to the technical scheme, the whole device is compact and integrated, the performance is stable, and efficient integration and real-time pressure sensing of the microchannel and the electrode system can be achieved.

The application belongs to the technical field of polyether preparation, and discloses a solid superbase catalyst and a method for preparing isomeric alcohol polyether by using the same. The solid superbase catalyst comprises a catalyst carrier and a strong base loaded on the catalyst carrier; the strong base is at least one selected from CH3OK, CH3ONa, KOH and NaOH; and the catalyst carrier comprises one of MgO, ZrO2 and Al2O3. The solid superbase catalyst provided by the application is composed of a catalyst carrier and a strong base loaded on the catalyst carrier, and has high catalytic activity and high reaction efficiency. When the solid superbase catalyst is used as a catalyst, isomeric alcohol polyether with low odor, narrow molecular weight distribution and few by-products can be prepared.

The present invention provides a method for producing N-vinylacetamide which prevents raw material gas (gasified raw material) from being liquefied due to recondensation, thereby suppressing the clogging problem caused by condensates in a pyrolysis reactor and enabling stable continuous operation over a long period of time. A method for producing N-vinylacetamide, comprising: a supply step of supplying a raw material containing N-(1-methoxyethyl)acetamide (MEA) to an evaporator, an evaporation step of evaporating the raw material in the evaporator to form a gasified raw material, a superheating step of supplying the gasified raw material to a superheater so that the superheated temperature of the gasified raw material becomes a temperature that is 5°C higher than the boiling point of N-(1-methoxyethyl)acetamide (MEA) at the internal pressure of the superheater (the boiling point of N-(1-methoxyethyl)acetamide at the internal pressure of the superheater + 5°C) and 200°C or less, and a pyrolysis step of supplying the superheated gasified raw material to a pyrolysis reactor for pyrolysis; wherein the content of N-(1-methoxyethyl)acetamide in the raw material is 80 to 100% by mass.

The present invention addresses the problem of providing a laser annealing device, a laser annealing method, and a manufacturing method, whereby an annealing process can be stably performed. A laser annealing apparatus according to an embodiment of the present invention comprises: a laser light source that emits laser light; an annealing optical system that irradiates the semiconductor film with laser light; a probe light source that emits probe light; an optical system that irradiates the semiconductor film irradiated with the laser light with probe light; a light detector that detects transmission light of the probe light that has passed through the substrate or reflected light of the probe light that has been reflected by the substrate; a transport path for transporting the substrate to change an irradiation position with respect to the substrate; and a processing unit that sets a process condition for laser annealing on the basis of a detection result of the photodetector when the substrate is transported.

The invention provides a preparation method and application of a lithium titanium aluminum phosphate solid electrolyte, and relates to the technical field of solid electrolytes. Specifically, the method comprises the following steps: firstly, preparing a solution containing a titanium source, a phosphorus source and an aluminum source, adjusting the pH value to be acidic, carrying out solvothermal reaction, and carrying out solid-liquid separation to obtain a solid phase; and mixing and grinding the dried solid phase and a lithium source, and carrying out two-stage sintering to obtain the titanium aluminum lithium phosphate. According to the invention, the technical defects of high energy consumption and non-uniform grain size of a solid-phase synthesis method in the existing synthesis process and low grain size and low yield of a product in a liquid-phase synthesis method can be effectively overcome; according to the preparation method, high-purity, uniform-particle-size and fine lithium titanium aluminum phosphate can be obtained, when the lithium titanium aluminum phosphate is used for a solid electrolyte of a lithium battery, the electrolyte structure can be optimized, the ionic conductivity can be improved, the preparation process is simple and easy to implement, and popularization and application during batch production are facilitated.

The invention belongs to the technical field of perovskite solar cells, and relates to a synthesis method of a novel electron transport layer material and an application of the novel electron transport layer material in a perovskite solar cell, (2-aminoethyl) diethyl phosphonate, 1, 8-naphthalic anhydride and 4-dimethylaminopyridine are mixed, reacted, filtered and purified, and then react with trimethylbromosilane to obtain the novel electron transport layer material. The novel electron transport layer material YG25 is an organic phosphonic acid small molecule with a naphthalimide structure; when the organic self-assembled perovskite thin film is applied to a perovskite device as an electron transport layer, dynamic self-assembly of organic molecules in the thin film is realized, passivation is performed on a perovskite interface, the microstructure of the upper surface of the perovskite layer is improved, and the organic self-assembled small molecules also generate chemical bonding action with an ITO layer on the upper interface of the electron transport layer, so that the perovskite device is more stable in performance. Diffusion of the electrode into the device is slowed down; the YG25 preparation method is simple, easy to operate, low in cost, capable of being applied to perovskite solar cells and wide in market prospect.

This application discloses a method for preparing a supported molecular sieve catalyst, the catalyst prepared therefrom, and its application. The molecular sieve is supported on Ni and ruthenium nitride, wherein the mass content of Ni is 0.5-2 wt%, the mass content of ruthenium nitride is 0.5-2 wt%, and the remainder is molecular sieve; the method includes the following steps: (1) immersing the molecular sieve in a solution containing nickel salt, drying, calcining, and reducing with hydrogen to obtain a Ni-supported molecular sieve; (2) immersing the Ni-supported molecular sieve in a ruthenium nitride complex solution, evaporating to dryness, to obtain the supported molecular sieve catalyst; the molecular sieve is selected from at least one of ZSM-5 molecular sieve, MOR molecular sieve, MCM-41 molecular sieve, and Beta molecular sieve.

The invention relates to silver powder internally provided with holes and a preparation method of the silver powder. The preparation method comprises the steps that a reducing solution containing a reducing agent, a dispersing agent, a surface modifying agent and nanocrystalline seeds and a silver solution containing silver nitrate are prepared; in the stirring state, the reducing solution is added into the silver solution for a reaction, after the reaction is conducted for a first preset time, a coating agent is added, after the reaction is continued for a second preset time, the reaction is ended, silver powder slurry is obtained, and the second preset time is longer than the first preset time; the silver powder slurry is subjected to solid-liquid separation, solids obtained through separation are cleaned, the cleaned solids are subjected to rinsing, secondary coating and drying, and the silver powder with the holes inside is obtained, so that the preparation method of the silver powder with the multiple holes inside is provided, the prepared silver powder has higher sintering activity, and the prepared silver powder has the good sintering performance. The preparation method is more suitable for the field of photovoltaic conductive silver paste, and the preparation method is simple and rapid, does not need complex subsequent treatment, is stable in reaction, and is beneficial to large-scale and continuous mass production.

This application discloses a nitrogen-containing catalyst for the dehydrogenation of cyclohexane to benzene, its preparation method, and its application. The catalyst comprises a hierarchical porous molecular sieve and a nitride supported on the surface of the sieve; the nitride is selected from FeN and / or Fe₂N. The catalyst provided in this application can be applied to the dehydrogenation reaction of cyclohexane to produce benzene and improves the conversion rate of cyclohexane and the selectivity of the benzene produced. The preparation method is stable, controllable, and reproducible. The method for the dehydrogenation reaction of cyclohexane to produce benzene provided in this application uses the catalyst provided in this application, resulting in a fast reaction rate, high yield, and applicability to large-scale production.

The present application relates to a kind of rare earth complex light stabilizer and its preparation method and use, the rare earth complex light stabilizer includes [Ce (triRNTB) 2]X3 And / or RE (BP) 3, the rare earth complex light stabilizer includes 40-100 parts by weight of [Ce (triRNTB) 2]X3 And 0-60 parts by weight of RE (BP) 3.The present application uses the rare earth complex as new functional additive is introduced into organic fluorescent dye light conversion system.By constructing "light conversion-stable" dual functional composite system, both can solve the light stability bottleneck of small molecule dye, also can realize light conversion efficiency compensation using the light-induced luminescence enhancement effect of complex.The strategy provides innovative material design ideas for developing long life, high stability blue light conversion film, and has important practical significance for promoting the technology upgrading of light conversion material.

This invention relates to the field of interlayer technology in laminated glass, and particularly to a binary composite plasticized gradient structure PVB interlayer, its preparation method, and laminated glass. The interlayer has a three-layer gradient structure, consisting of a first surface layer, a middle sound-insulating layer, and a second surface layer from the outside in. Both the first and second surface layers contain a first PVB resin and a first composite plasticizer, which includes diethylene glycol dibenzoate and 3GO. The middle sound-insulating layer contains a second PVB resin and a second composite plasticizer, which includes a mixture of diethylene glycol dibenzoate and 3GH. This invention, through innovative material formulation and structural design, provides a PVB interlayer solution that balances high weather resistance, excellent sound insulation, strong adhesion, low plasticizer migration tendency, and additional heat insulation functions. It also includes a stable and efficient preparation method, effectively overcoming the limitations of existing technologies where performance cannot be synergistically improved.