21results about How to "Simple process route" patented technology

The application discloses a preparation method of three-dimensional hollow carbon spheres. The three-dimensional hollow carbon spheres are prepared by one-step pyrolysis method through the three-dimensional network structure of melamine foam and the compounding of MOFs materials. The method is simple in process, environment-friendly, low in cost and capable of industrial production. The three-dimensional hollow carbon spheres prepared by the method have uniform and good micro-morphology, the carbon spheres are hollow in the inside, each carbon sphere has four branches connected with other carbon spheres, and multiple carbon spheres are connected to form a three-dimensional network structure.

The invention provides a candesartan cilexetil capsule and a preparation method thereof, and the candesartan cilexetil capsule is characterized in that each capsule contains candesartan cilexetil, lactose, corn starch, hydroxypropyl cellulose, carboxymethyl cellulose calcium, polyethylene glycol 8000 and magnesium stearate. According to the candesartan cilexetil capsule provided by the invention, the problem of stability of candesartan cilexetil is solved, the possibility of crystal transformation of common tablets in a tabletting process is reduced, and the characteristic dissolution curve of a final product is similar to that of a reference preparation; the preparation method is simple in process route, the fluidized bed one-step granulation method enables the loss to be less, the product yield is higher, and the industrial mass production cost is reduced.

The invention belongs to the field of medicinal chemistry, and particularly relates to a colopivir synthesis process which is simple in process route, cheap and safe in reagent, free of heating and cooling operation, low in energy consumption, good in product quality, high in yield and wide in commercial development prospect, the synthesis efficiency and operation convenience are greatly improved, and the time cost is reduced.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 4-bromopyrazole [3,4-D] -pyrimidine, and the specific steps are as follows: under the condition of anhydrous and anaerobic, 4-chloro-1H-pyrazolo [3,4-d] pyrimidine is reacted with a brominating reagent in an aprotic solvent to obtain 4-bromopyrazole [3,4-D] -pyrimidine. The preparation method provided by the application has the advantages of simple process route, clear steps, high yield of the target product, low cost, suitability for industrial production, considerable economic benefits, mild reaction condition and environmental protection.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to an absorbing material, its preparation method, and its application. This invention uses multi-walled carbon nanotubes (MWCNTs), potassium permanganate (KMnO4), and divalent manganese as raw materials, based on Mn... 2+ With MnO4 ‑ The redox reaction between the two components allows for in-situ uniform loading of MnO2 nanoparticles onto the MWCNT surface through simple stirring in a room-temperature liquid environment, resulting in microwave absorption performance superior to most similar absorbing materials. Compared to traditional methods for preparing absorbing materials, the technical route of this invention offers significant advantages, including simple preparation process, no pollutant emissions, energy-saving and environmentally friendly process, adjustable and controllable material structure, excellent microwave absorption performance, and scalability. This method effectively overcomes the technical limitations in the preparation of absorbing materials, providing a scalable new paradigm for the green and large-scale production of high-performance absorbing materials.

The application discloses a kind of FeCoNi nanoparticle loaded yeast-derived carbon composite wave-absorbing materials and preparation method thereof.The method uses yeast as biomass carbon source, and yeast-derived carbon is obtained by hydrothermal carbonization;Then, the three-metal precursor salt (Fe2+, Co2+, Ni2+) is dissolved in the solvent according to a certain mass ratio with yeast-derived carbon, and FeCoNi nanoparticles are in-situ loaded on the surface of yeast-derived carbon by hydrothermal impregnation method, and the composite wave-absorbing material is obtained after drying and inert atmosphere heat treatment.The FeCoNi nanoparticles in the obtained material are uniformly dispersed on the surface of carbon material, and the synergistic effect of dielectric loss and magnetic loss is utilized to achieve excellent electromagnetic wave absorption performance.The method is simple, low in cost, and requires small equipment, and the prepared material is environmentally friendly, sustainable, and has strong controllability, etc., and is suitable for radar stealth field.

The invention discloses a PEM electrolyzed water catalyst carrier and a preparation method and application thereof. The PEM electrolyzed water catalyst carrier is of a nano needle-shaped structure, the length of the nano needle-shaped structure is 50-200 nm, the diameter of the nano needle-shaped structure is 5-20 nm, and the length-diameter ratio of the nano needle-shaped structure is (10-20): 1; the molecular formula is AxTi (1-x) O2, x is 0.01-0.05, and A is a metal. The catalyst carrier disclosed by the invention is simple in process, low in cost and easy for large-scale production, and the nanostructure and crystalline phase composition of the carrier can be accurately controlled; the catalyst carrier is in a nanoneedle shape, and is high in conductivity, large in specific surface area and excellent in stability; the carrier has the advantages of high catalytic activity, low precious metal consumption and long service life when being applied to a PEM electrolyzed water catalyst.

This invention belongs to the field of pharmaceutical chemistry, specifically relating to a lasmidetane-terephthalic acid salt and its preparation method. The crystal form of this salt consists of two molecules of lasmidetane and two molecules of terephthalic acid as basic units. This crystal form exhibits high chemical stability and significantly improves the dissolution rate of lasmidetane, meeting the stringent requirements of formulation development for the dissolution and absorption of the active ingredient. Furthermore, the preparation method is simple and suitable for industrial production.

According to the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy and the preparation method thereof, through the collaborative design of B microalloying, homogenization, cross cold rolling deformation and medium-temperature heat treatment optimization, a fine and uniform eutectic lamellar structure and a high-density dislocation structure are formed in a plate, the brittleness brought by an as-cast coarse structure is effectively relieved, and the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy is obtained. The tensile strength and the yield strength are remarkably improved, meanwhile, high ductility and fracture resistance are kept, and the performance anisotropy caused by the rolled texture is further weakened. The technological process is simple, parameters are easy to control, and the method is suitable for industrial amplification application and is suitable for high-temperature structural parts, molds, impact load components and other scenes with high requirements for comprehensive mechanical properties of materials.

The present application relates to the technical field of silicone waterproof agent, and particularly relates to a synthesis method of cross-linkable silicone waterproof agent, which comprises the following steps: S1, carrying out hydrosilylation addition reaction on polydimethylsiloxane terminated by Si-H at both ends and a compound containing an allyl group and an epoxy group under the action of a platinum catalyst to obtain a modified polysiloxane intermediate containing an epoxy group at both ends; S2, introducing a hydrolyzable alkoxy group into the terminal of the modified polysiloxane intermediate obtained in S1 to obtain cross-linkable modified polysiloxane containing a hydrolyzable alkoxy group at the terminal; S3, adding water to the cross-linkable modified polysiloxane obtained in step S2 and optionally adding a non-ionic surfactant, stirring and emulsifying, and adjusting the pH value to be acidic by using acetic acid to prepare the cross-linkable silicone waterproof agent, wherein the silane group containing a hydrolyzable alkoxy group is introduced into the polydimethylsiloxane main chain at both ends, the modified polysiloxane is endowed with built-in self-crosslinking ability, and durable waterproof finishing can be realized without adding an external cross-linking agent, and the process is simple and good in stability.

The application provides a Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material and a preparation method thereof, and relates to the technical field of metal matrix composite materials. The method comprises the following steps: etching Ti3AlC2 powder to obtain multilayer Ti3C2T x particles; then, silver particles are plated on the surfaces of the Ti3C2T x particles by a chemical plating process to obtain Ti3C2T x Ag composite particles; and finally, the composite particles are mixed with copper-based powder, and the mixture is formed and sintered by a powder metallurgy process to obtain Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material. The application solves the problems of easy agglomeration of Ti3C2T x and silver particles in the matrix and uneven dispersion by constructing a core-shell structure of the reinforcing phase, realizes lubrication synergy of the two at different temperatures, and has the advantages of simple operation, economy, good repeatability, excellent tribological performance of the prepared material, and widened application of copper-based composite materials.

The present application relates to the technical field of traditional Chinese medicine preparation, in particular to a Huangbai eight flavor tablet and a preparation process thereof. The Huangbai eight flavor tablet is a film-coated tablet, comprising a tablet core and a double-layer film coating. The tablet core is composed of Huangbai, Xiangmo, Zhizi, Gancao, Honghua, Baidu, Niudan powder and Huangbai enrichment and re-addition granules. The total mass fraction of the eight medicinal materials is 89.0-97.8 wt%. The Huangbai enrichment and re-addition granules are prepared by adsorbing Huangbai alkaloid enrichment solution on self-supporting porous adsorption granules. The double-layer film coating comprises a carboxymethyl cellulose sodium-glycerol inner layer and a hydroxypropyl methyl cellulose-glycerol outer layer. The present application realizes high-concentration alkaloid enrichment and uniform re-addition through self-supporting porous adsorption technology, solves the contradiction between high loading and formability, realizes moisture-proof barrier and rapid disintegration balance through the double-layer film coating structure, significantly improves the tablet formability, stability and bioavailability, and is suitable for industrialized production of heat-clearing and dampness-drying traditional Chinese medicine.

The application relates to the field of high polymer composite materials, in particular to a method for preparing a medium-temperature curing epoxy resin material for carbon fiber pre-impregnation, which comprises the steps of raw material preparation, resin dispersion premixing system and medium-temperature curing resin material preparation; the process carries out constant-temperature high-shear dispersion of an epoxy resin matrix and core-shell structure toughening particles at 50-60 DEG C; the core is that through physical shearing and thermodynamic swelling cooperation, the resin penetrates into the shell layer of the toughening particles, the toughening phase is introduced in a semi-stable state, and the core-shell active groups are utilized to realize co-curing reaction during curing; the application does not need high-temperature pre-reaction, breaks through the technical obstacles of high viscosity and particle filtration caused by traditional toughening and impregnation failure, and significantly improves the interlayer fracture toughness and shear strength of the composite material under the premise of maintaining the heat resistance and modulus of the system.

The present application relates to a kind of drug synthesis process of Tovorafenib.The synthesis process described in the present application, the preparation method of chiral alpha-heteroamine involved, using biological catalyst amine dehydrogenase, directly under mild conditions, one-step reduction amination of latent chiral ketone is into optical pure chiral alpha-heteroamine, it can overcome the deficiency of existing catalytic technology, process route is simple, reaction condition is mild, yield is high, has the advantages, such as step economy, atom economy and other green synthesis, and the advantages, such as good stereoselectivity (ee value is as high as 99%).The condensation method of amino and carboxyl in the synthesis route described in the present application is mostly under HATU and alkaline environment, simple operation, high reaction yield, suitable for batch production.

This invention relates to a method for recovering cobalt from cobalt-containing copper raffinate, comprising the following steps: (1) adding a first precipitant to the cobalt-containing copper raffinate for pre-removal of impurities, followed by solid-liquid separation to obtain a post-removal liquid and impurity residue; (2) adding a second precipitant to the post-removal liquid for cobalt precipitation, followed by solid-liquid separation to obtain a post-precipitation liquid and cobalt precipitation residue; (3) adding a leaching agent to the cobalt precipitation residue and performing solid-liquid separation to obtain leaching residue and leaching liquid; (4) adding a third precipitant and an oxidizing agent to the leaching liquid for oxidative cobalt precipitation, followed by solid-liquid separation to obtain a post-precipitation liquid and cobalt-enriched residue; (5) adding a transformation agent to the cobalt-enriched residue for transformation leaching, followed by solid-liquid separation to obtain a cobalt-enriched liquid and transformation residue; (6) cooling and crystallizing the cobalt-enriched liquid and performing solid-liquid separation to obtain crystalline cobalt salt and crystallized liquid. This invention achieves efficient cobalt recovery and high-purity product preparation with low reagent consumption and environmental friendliness.

This invention discloses a high-nitrogen-doped flexible porous carbon fiber membrane based on ammonia-activated flax, its preparation method, and its applications. Using biomass flax fabric as the carbon precursor, the membrane is first pre-carbonized at a programmed rate of 750-850℃ in an inert gas atmosphere, followed by activation treatment at 850-950℃ in a mixed atmosphere of ammonia and inert gas. This invention has the following advantages and effects: Through the aforementioned "Type IV" programmed ammonia activation strategy, this invention achieves simultaneous carbonization, activation, and nitrogen doping in a one-step process using biomass waste as raw material. The process is simple, green, and efficient.

The invention belongs to the technical field of carbon materials, and provides an sp2 hybridized nano composite carbon material with high hardness and superelasticity and a preparation method thereof, the carbon material is obtained by molding an sp2 hybridized carbon raw material under the action of temperature and pressure, in the forming process, the sp2 hybrid carbon raw material reacts to form a blocky structure mainly composed of amorphous carbon and crystal graphite clusters; the size distribution of the crystal graphite cluster is below 10nm; the mass ratio of sp2 hybrid carbon atoms in the blocky structure is more than 90%; the Vickers hardness value of the blocky structure is 20 GPa or above, the indentation elastic recovery rate is 90% or above, the initial oxidation temperature is about 900 DEG C or above, the room-temperature conductivity is 1 * 10 < 5 > S / m or above, and the blocky structure has wide application prospects in the fields of micro-nano electronic devices, aerospace and the like. The method disclosed by the invention is rich in raw material source, simple to operate and easy in condition control, and has the potential of industrial large-scale production.

The invention relates to a lithium ion capacitor anode material pre-lithiation method based on direct contact of a lithium foil, which comprises the following steps: calculating the required area of the lithium foil according to the type of the lithium ion capacitor anode material, the lithium intercalation capacity and the thickness of the lithium foil; cutting the lithium foil according to the required area, and completely covering the lithium foil on the surface of the anode plate; the anode strip covered with the lithium foil is rolled, and it is ensured that the lithium foil is completely attached to the surface of the anode strip; adding a preset amount of electrolyte into the rolled anode plate, and sealing; fully standing the sealed anode strip to ensure that the lithium foil completely reacts and is completely pre-lithiated; and cleaning the pre-lithiated anode plate to finally obtain the pre-lithiated anode of the lithium ion capacitor. Compared with the prior art, a direct contact pre-lithiation method is adopted, and diaphragm-free anode pre-lithiation can be achieved through the self-discharge process.

The application relates to a preparation method of a high-friction-coefficient rubber roller composite material, and relates to a rubber roller material preparation method. 4-allyl-2-methoxy phenol and furfural are used as starting materials, an allyl phenolic aldehyde resin containing an unsaturated carbon-carbon double bond is prepared through a condensation reaction, then an allyl phenolic aldehyde resin containing an alcohol hydroxyl group is obtained under the action of an organic lithium catalyst, and finally the allyl phenolic aldehyde resin containing the alcohol hydroxyl group is crosslinked with N,N-methylene bisacrylamide crosslinking agent through reverse-phase suspension polymerization to prepare rigid nanoparticle microspheres. The obtained nanometer microspheres contain a large number of alcohol hydroxyl groups which can react with isocyanate groups, the rigid particles are added into a liquid rubber roller mixture containing polyhydric alcohol, isocyanate and a small-molecule chain extender, and a high-friction-coefficient polyurethane rubber roller can be obtained, and the application has a wide application prospect.

The invention provides a preparation method of a large-area ultrathin perovskite single crystal. The preparation method comprises the following steps: S1, obtaining a perovskite seed crystal; s2, putting the perovskite seed crystal in the step S1 into a first solvent, and heating to carry out heat treatment on the perovskite seed crystal to change a surface microstructure; s3, placing the treated perovskite seed crystal in a glass container, sequentially adding a second solvent and a perovskite precursor growth solution, and placing the glass container on a heating stage to obtain a perovskite single crystal with the thickness of 1-2cm; s4, fixing the perovskite single crystal on a glass sheet by using paraffin, cutting off seed crystals in the perovskite single crystal by using a blade, and thinning the perovskite single crystal to obtain a large-area ultrathin perovskite single crystal wafer; wherein the second solvent in the step S3 is immiscible with the perovskite precursor growth solution, and the density of the second solvent is smaller than that of the perovskite precursor growth solution. The method has the advantages of inhibiting the growth of the crystal in the vertical direction, reducing the carrier recombination rate and reducing the crack and breakage probability.

The invention discloses a method for preparing ethylbenzene through alcohol-mediated polystyrene catalytic hydrogenolysis and a catalyst thereof. Comprising the following steps: mixing a copper salt solution with an alkaline oxide dispersion liquid, dropwise adding an alkaline precipitator under a heating condition to adjust the pH value to 4-10, centrifuging, washing, drying and calcining to obtain the catalyst. The catalytic hydrogenolysis method comprises the following steps: adding polystyrene, a catalyst and alcohol into a reactor together, and reacting for 1-24 hours at 300-500 DEG C in an inert atmosphere to obtain ethylbenzene. The core of the method is that the alcohol is used as a reaction medium and an in-situ hydrogen source, the hydrogenolysis reaction of polystyrene is realized under the catalytic action, the dependence on high-risk and high-pressure externally supplied hydrogen in the traditional process is avoided, and the process safety is remarkably improved. And the preparation process is simple, low in cost and easy to recycle. By applying the method, the yield of light aromatic hydrocarbon can reach 70% or above, the yield of ethylbenzene can reach 42% or above, and a novel and efficient solution is provided for safe and high-valued recovery of polystyrene waste.