12results about How to "Atom utilization is high" patented technology

This invention discloses an axially chiral 1,4'-biquinolinone and its derivatives, and a synthetic method thereof. The method uses MBH carbonate and quinoline-2(1 H Using β-ketones as raw materials, (DHQD)₂PYR as catalyst, and DME as solvent, a centrally chiral β-substituted allyl intermediate was synthesized; then, using iron powder as a reducing agent and acetic acid as solvent, enantiomeric enriched centrally chiral γ-lactam compounds were obtained; finally, using DBN as a base and DME as solvent, enantiomeric enriched compounds were obtained. (S) -Axial chiral 1,4'-biquinolinone or its derivatives. The method of this invention has mild reaction conditions, readily available raw materials, high enantioselectivity of the product, and excellent yield. The synthesized 1,4'-biquinolinone or its derivatives can be further used to synthesize novel substituted quinolinone phosphonate compounds, and to synthesize drugs with antibacterial, antimalarial, anticancer, antitumor, or herbicidal activities, showing broad application prospects.

The application discloses a kind of carbon black supported iron manganese composite oxide cluster catalyst's Joule heat preparation method and its application in electrocatalytic nitrate reduction preparation ammonia, belong to electrocatalytic ammonia preparation technical field.The catalyst Ketjenblack EC-600JD carbon black is used as carbon carrier, iron manganese composite oxide cluster is uniformly dispersed on the surface of carbon carrier, and the carbon carrier is worm-like mesoporous structure, with high specific surface area and high defect concentration.The application uses sodium citrate as complexing agent, acetylacetone iron and manganese acetate as metal precursor, after complexing, loading, gelation, freeze drying, the target catalyst is prepared by Joule heat instantaneous heat treatment under nitrogen atmosphere;The preparation process has high heat conversion efficiency, low energy consumption, can realize atomic dispersion of iron manganese composite oxide cluster, effectively improves the exposure degree of catalytic active site.The catalyst shows high catalytic activity, high selectivity and excellent stability in electrocatalytic nitrate reduction preparation ammonia reaction, and the ammonia preparation faraday efficiency can reach more than 85%, and the preparation process does not need noble metal and toxic reagent, and the process is green and efficient, easy to scale production, can efficiently convert nitrate wastewater into ammonia, with environmental governance and nitrogen resource recycling value.

The application belongs to the field of agricultural chemistry, and particularly relates to an activator based on structural modification of L-methionine and a synthesis method and application thereof; the application takes L-methionine as a core raw material, which is of natural origin, cheap and easy to obtain and excellent in biocompatibility, and performs structural modification through one-step esterification to synthesize a target compound 2-(diethylamino)ethyl-L-methionine ester; biological activity experiments prove that the compound can effectively promote the germination rate of crops at a low concentration, significantly optimize the growth state of roots and stems, and greatly enhance the stress resistance potential of seedlings; in addition, the compound has outstanding industrialization advantages, and is simple in production process, controllable in raw material cost and excellent in water solubility, with a solubility in water of greater than or equal to 30 g / L at 25 DEG C, so that it can be mass-produced without complex post-treatment, thereby not only effectively reducing the input cost of agricultural production, but also significantly improving the yield and quality of crops, and providing a new path for the development of green and environmentally-friendly plant growth activators.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

This utility model relates to the field of triethylsilane synthesis technology and discloses an apparatus for triethylsilane synthesis, comprising: a raw material storage component for storing synthesis raw materials; a mixing device for mixing the raw materials output from the raw material storage component; and a fixed-bed reactor filled with a catalyst. By providing the temperature required for the reaction, the mixed raw materials react with each other on the catalyst surface under certain pressure and temperature to generate the desired substance. This utility model provides a production apparatus for triethylsilane, which is a fully continuous process device including reaction and separation processes. This apparatus supports the production of triethylsilane from tetrahydrosilane and ethylene via fixed-bed catalytic reaction. The apparatus has a simple process, high atom utilization, simplified flow, no solvent use, low waste, and can achieve continuous and automated operation.

The present application relates to a kind of natural (6S) -5-methyl tetrahydrofolate and its preparation method, wherein the natural (6S) -5-methyl tetrahydrofolate is prepared by reducing process with folic acid as raw material, and no heavy metal such as platinum or lead, and formaldehyde, benzene sulfonic acid and its ester and other raw materials are used in production process;The content of the natural (6S) -5-methyl tetrahydrofolate is not less than 98%, the amount of JK12A is not higher than 0.1%, methyl tetrahydropterin is not detected, benzene sulfonic acid and its ester are not detected, and enzyme protein residue is not higher than 1 ng / g;The present application has the advantages of convenient post-processing, green environmental protection, high product purity and the like due to the use of green biological production process.

The application discloses a catalyst for heptafluoroisobutyramide dehydration reaction and a preparation method thereof, relates to the field of catalysis technology, and the catalyst comprises an active component, a carrier, an additive and a complexing agent, wherein the active component is monodispersed high-valence metal-oxygen species, the carrier is one or more of porous silica or porous gamma-Al2O3, the additive refers to one kind of nitrate salt containing Na, K or Cs, and the complexing agent is one of acetic acid, citric acid, urotropine, cetyltrimethylammonium bromide or cetyltrimethylammonium hydroxide; the high-valence metal-oxygen species refers to M-O x , M is one of W, Mo, V, Cr, Mn or Co, and X=1.0-3.0. The preparation method comprises the steps of dissolving, impregnating, drying, calcining and the like. The active component in the catalyst is highly dispersed, has excellent catalytic dehydration performance, has high atomic utilization rate, the preparation method is simple, no three wastes are discharged, and the catalyst has a good industrial application prospect.

This application discloses an in-situ preparation method for a catalyst, comprising the following steps: gasifying a nitrogen-containing substance and / or a phosphorus-containing substance to obtain a mixed gas, passing it into a reactor containing a support, and performing heat treatment I and heat treatment II to obtain the catalyst. This method enables the uniform introduction of active components and additives, resulting in a uniform distribution of active sites in the prepared catalyst, which is beneficial for improving the catalyst's activity and selectivity. When used in the reaction of acetate and NH3, the catalyst can suppress side reactions and achieve high acetonitrile selectivity. It avoids corrosiveness to reaction equipment, provides mild reaction conditions, has high atom utilization, and is suitable for continuous, stable, and large-scale production.

The invention relates to the technical field of new energy materials, and discloses a high-performance electrochemical catalyst and a preparation process thereof, and the preparation process comprises the following steps: preparing a composite carrier with a carbon nanotube vertically growing on the surface of graphene through a chemical vapor deposition method; introducing nitrogen and sulfur heteroatoms by adopting plasma-assisted vapor deposition; enabling the metal precursor to be uniformly adsorbed on the carrier in a laminar flow state by utilizing a micro-fluidic reactor; and finally, carrying out stepped heating pyrolysis and annealing treatment to obtain a finished product. The obtained catalyst has a three-dimensional conductive network structure containing rich through pore channels, and iron and cobalt metal active centers are anchored to defect sites of a carrier in a coordination form. According to the process, atomic-scale dispersion of active components is achieved through a microfluidic technology, lattice stress is effectively eliminated in cooperation with stepped pyrolysis, the problem that the activity and stability of the catalyst are difficult to consider at the same time is successfully solved, the oxygen reduction catalytic performance is improved, the cycle life is prolonged, and the mass transfer performance under the large-current working condition is excellent.

This invention discloses a highly stable platinum / palladium-based ammonia oxidation catalyst with a bilayer gradient support, its preparation method, and its applications. The catalyst possesses a multi-level synergistic structure of "atomic-scale dispersed Pd or Pt / V-O-W oxide / hydroxylated TiO₂@(ZrO₂ / Al₂O₃ / CeO₂ or its composite oxide) bilayer gradient support," forming a Pd-O-V / Pt-O-V bonded electronic synergistic system and constructing a protective outer layer with a precise pore size of 2-5 nm. It is constructed through a precise sequential process including hydrothermal hydroxylation modification, atomic layer deposition, sol-gel, and low-temperature reduction post-treatment. The ammonia oxidation catalyst provided by this invention achieves a synergistic effect of intrinsic anti-poisoning and high activity over a wide temperature range. The ZrO₂-CeO₂ composite oxide outer layer further enhances its antioxidant protection capability; the atomic-scale dispersion of Pd or Pt achieves ultra-low loading and high atomic utilization, significantly reducing costs. This invention solves the core technical problems of traditional Pd or Pt-based catalysts being prone to poisoning and deactivation, and having poor low-temperature activity.

The present application relates to brassinosteroid intermediate preparation and its purification method, belong to the field of medicine and chemical technology. The present application provides the preparation method of formula 1 brassinosteroid intermediate, reaction as follows: wherein, wherein R1 And R2 Independently selected from -COR3, C1-C8 Alkyl or R1 And R2 Together form R3 Selected from C1-C 20 Linear or branched alkyl, substituted C1-C 20 Alkyl, phenyl, substituted phenyl, preferably C1-C8 Linear or branched alkyl, phenyl or substituted phenyl, substituted phenyl is selected from the phenyl group, F, Cl, Br, nitro, methoxy arbitrary substitution C1-C6 Alkyl; comprising the following steps: step 1: formula 2 compound in solvent under the action of oxidant formula 3 obtains formula 1 compound. As described above, the preparation method of brassinosteroid intermediate of the present application, has the advantages of high selectivity, low cost and simplification of post-processing.

This invention discloses a photo-initiated method for preparing phenyl or substituted phenyl γ-ketoamides, belonging to the field of pharmaceutical compound synthesis. The method provided by this invention uses a transition metal salt as a catalyst, reacts in an air atmosphere, and yields phenyl or substituted phenyl γ-ketoamide products at room temperature and under light irradiation. This catalyst exhibits high catalytic efficiency and can produce phenyl or substituted phenyl γ-ketoamide products in high yield. This invention addresses the limitation of synthetic routes for phenyl or substituted phenyl γ-ketoamide compounds by providing a simple and direct preparation route. The method does not require expensive metal catalysts or external strong oxidants, has mild reaction conditions, and simple operation and post-processing. It is suitable for the synthesis and large-scale preparation of phenyl or substituted phenyl γ-ketoamide compounds, and features high efficiency, environmental friendliness, safety, and cost-effectiveness.