443 results about "Metal free" patented technology

The invention discloses an actinide-graphdiyne aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The actinide-graphdiyne aerogel composite material comprises actinide ions, iodide ions and graphdiyne aerogel, the graphdiyne aerogel is of a porous net structure, and the actinide ions and the iodide ions exist on the surface of the graphdiyne aerogel in the form of nanoclusters; and the actinide ions are selected from one of Th, Pa, U, Np, Pu and Am ions. The actinide-graphdiyne aerogel composite material can be used as a catalyst to realize efficient thermocatalytic ammonia production under mild conditions, the thermocatalytic ammonia production performance of the composite material can be regulated and controlled by changing a monomer structure for preparing graphdiyne aerogel, and even thermocatalytic ammonia production of the graphdiyne aerogel material is realized under the condition of no metal load; the catalyst is expected to become a new-generation high-performance thermocatalytic ammonia production catalyst.

The invention discloses a microbial electrochemical efficient preparation method and application of metal nanoparticles, the metal nanoparticles are prepared and synthesized by regulating the redox metabolism behavior of microorganisms through positive / negative constant potential, and the microorganisms are electroactive microorganisms domesticated and cultured by activated sludge or single bacteria; the metal nanoparticles are in a solid state of a metal simple substance, are formed on the surface of an electroactive biological membrane, and are generated by electroactive microorganisms through extracellular electron transfer dissolved-state metal salt reduction. The palladium or silver and other metal nanoparticles prepared by the method are uniformly distributed on the surface of the electroactive biological membrane, the particle size is 1-10nm, the electroactive biological membrane-metal nanoparticle complex has extremely strong reducibility, and the electroactive biological membrane-metal nanoparticle complex is used for treating a non-biodegradable organic pollutant (4-chlorophenol), so that compared with a non-electroactive biological membrane and a treatment group without metal ions, the electroactive biological membrane-metal nanoparticle complex has the advantages that the biodegradability is greatly improved; the degradation effect is the best.

The invention discloses an environment-friendly PVC-U plastic pipe fitting and a manufacturing method thereof, and relates to the technical field of plastic waste recycling, and the environment-friendly PVC-U plastic pipe fitting is prepared from the following raw materials in parts by weight: 30-50 parts of regenerated PVC particles and 50-70 parts of raw PVC resin. Plasma-nano SiO2 co-activation is combined with a supercritical CO2 extraction technology, plasticizer residues in regenerated PVC are efficiently removed, the surface activity is improved, a multi-scale mechanical interlocking structure is constructed in cooperation with a four-level plant fiber reinforcing agent, gradient density design is combined, the ring stiffness larger than or equal to 8 kN / m < 2 > is achieved under the condition that no metal reinforcing layer exists, and the performance of the regenerated PVC is improved. Meanwhile, by utilizing the synergistic effect of maleic anhydride grafting modification and pulsed magnetic field orientation curing, the compatibility of the reclaimed material and primary resin is improved, a modulus gradient interface is formed, stress concentration is effectively relieved, the recovery rate of the waste PVC pipe is increased, and the product has the self-cleaning and electromagnetic shielding functions.

The invention belongs to the field of pharmacy, and particularly relates to a 2-(3-fluorophenyl)-3-(phenylseleno)-4H-pyridine-[1, 2-a] pyrimidine-4-ketone compound and application thereof. The compound is prepared through electrochemical driving under the conditions of no metal and no oxidizing agent, is a yellow solid, and gives a quasi-molecular ion peak [M + H] +: 397.0250 through a high-resolution mass spectrum. The invention relates to application of 2-(3-fluorophenyl)-3-(phenylseleno)-4H-pyridine-[1, 2-a] pyrimidine-4-ketone in preparation of drugs for resisting the Alzheimer's disease and the Parkinson's disease, the 2-(3-fluorophenyl)-3-(phenylseleno)-4H-pyridine-[1, 2-a] pyrimidine-4-ketone has a good effect on resisting the Alzheimer's disease and the Parkinson's disease, and the 2-(3-fluorophenyl)-3-(phenylseleno)-4H-pyridine-[1, 2-a] pyrimidine-4-ketone can be used for preparing drugs for resisting the Alzheimer's disease and the Parkinson's disease. A novel medicine is provided for resisting the Alzheimer's disease and the Parkinson's disease.

A metal-free signal cable made of at least 24 carbon rovings twisted together for use in music reproduction as a loudspeaker cable, small signal cable or bridge, which is kept free from external influences by spacers made of electromagnetically practically neutral aluminum-magnesium alloy. Even the highest-quality hi-fi systems sound significantly more energetic, clearer, more accurate, more tangible, and even more "in the room" when using my invention. Transients are much more realistic, the reproduced stage size increases significantly, the sound and positioning of the instruments involved are noticeably improved, and each individual note becomes significantly more subtle, complex, and rich in nuance. Even the smallest sound events become perceptible, which are lost with conventional solutions.

The invention discloses a selective etching solution for a titanium and / or copper metal layer of a circuit board and a preparation method of the selective etching solution, and the selective etching solution comprises the following components: 10-20% of persulfate, 4-8% of o-nitrobenzenesulfonate, 0.5-1% of phosphoric acid, 0.2-0.8% of 3-(aminomethyl) pyrazole, 0.3-1.5% of ammonium fluoride, 2-5% of cyclohexanediamine tetraacetic acid, 0.1-0.5% of cyclodextrine and the balance of water. The etching solution can selectively etch a titanium and / or copper metal layer, through selection and cooperation of etching solution components, etching is uniform and stable, taper angle and lateral etching control is good, metal wires are smooth, no metal residues exist, and a good etching solution is provided for the circuit board etching process.

The invention relates to the field of catalysts, in particular to a preparation method and application of an alumina-loaded copper-doped graphene-like catalyst, and the preparation method comprises the following steps: step 1, dispersing biomass in deionized water to form a suspension A; step 2, adding an aluminum salt and an iron salt into the turbid liquid A to form a turbid liquid B; step 3, adding a nitrogen source into the turbid liquid B to form impregnation liquid C; step 4, pouring the steeping liquor C into a beaker filled with alumina pellets, and drying to obtain dried pellets; and 5, roasting the dried pellets in a tubular furnace, cooling to room temperature, repeatedly washing with water, and drying to obtain the catalyst. The catalyst disclosed by the invention can be used for rapidly degrading refractory organic pollutants in water within 30 minutes under the synergism of microorganisms. The catalyst provided by the invention has good stability in the process of removing organic pollutants, and almost no metal ions are released.

The invention provides a preparation method of an organic polymer photocatalyst and application of the organic polymer photocatalyst in the aspect of photocatalytic synthesis of nitric acid (HNO3) by directly taking nitrogen (N2) and oxygen (O2) as raw materials in water, and additional reagents do not need to be added. It is worthy of notice that the organic polymer photocatalyst (PyOP) shows excellent photocatalytic performance. When O2 is subjected to photocatalytic reduction, the yield of hydrogen peroxide (H2O2) reaches 10147.5 [mu] mol g <-1 > cat, and meanwhile, 672.8 [mu] mol g <-1 > cat of HNO3 can be synthesized by directly utilizing N2 and O2. The preparation method of the photocatalyst provided by the invention is simple, the raw materials are easy to obtain, the preparation cost is low, a metal-free photocatalytic platform only using H2O, N2 and O2 is constructed, and the photocatalyst is used for green and sustainable nitric acid production.

Metal-free frame designs for silicon bridges for semiconductor packages and the resulting silicon bridges and semiconductor packages are described. In an example, a semiconductor structure includes a substrate having an insulating layer disposed thereon, the substrate having a perimeter. A metallization structure is disposed on the insulating layer, the metallization structure including conductive routing disposed in a dielectric material stack. A first metal guard ring is disposed in the dielectric material stack and surrounds the conductive routing. A second metal guard ring is disposed in the dielectric material stack and surrounds the first metal guard ring. A metal-free region of the dielectric material stack surrounds the second metal guard ring. The metal-free region is disposed adjacent to the second metal guard ring and adjacent to the perimeter of the substrate.

The invention provides an alpha, beta unsubstituted 1, 4-ketoaldehyde compound and a metal-free photocatalytic aqueous solution acetaldehyde alpha-position selective single alkylation reaction preparation method and application thereof, a photosensitizer and alpha bromine / chloro aryl ethyl ketone are mixed in an organic solvent, then TEEDA, nBu4NI and an acetaldehyde aqueous solution are sequentially added, white light irradiation stirring reaction, separation and purification are performed, and the alpha, beta unsubstituted 1, 4-ketoaldehyde compound is obtained. Compared with the prior art, the method has the advantages that by improving the light source, the reaction can be amplified to the gram scale level, the yield of the corresponding alpha and beta unsubstituted 1, 4-ketoaldehyde product is not obviously reduced, and a basis is provided for the industrialization process of the reaction. The reaction disclosed by the invention has the characteristics of wide substrate range, high functional group tolerance, simplicity in operation, mild reaction conditions and the like. Moreover, the product disclosed by the invention can be subjected to reductive amination with cyclic secondary amine to obtain a series of gamma-aminoketones with biological activity, which shows that the reaction has potential synthesis application value in the field of pharmaceuticals.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The invention discloses a method for electrochemical C-H deuterization of pyridine derivatives and D2O and a deuterated compound prepared by the method. The method provided by the invention comprises the following steps: under a power-on condition, a pyridine derivative, an electrolyte and D2O are subjected to an electrochemical reaction in a solvent, so that a C-H bond in the pyridine derivative is converted into a C-D bond. The invention provides a method for carrying out C4 selective C-H deuterization reaction on a simple, metal-free and acid / alkali-free pyridine derivative by using economic and convenient D2O at room temperature. The strategy has the characteristics of high efficiency and environmental friendliness, has high chemical and regioselectivity, and can provide a wide range of D compounds, such as pyridine, quinolones, N ligands and biological related compounds.

The invention belongs to the technical field of catalysts, and provides an oxygen-doped carbon nitride catalyst and a preparation method and application thereof.The preparation method comprises the steps that melamine, a hydrogen peroxide aqueous solution and acetonitrile are mixed and subjected to a hydrothermal reaction, and a precursor material is obtained; and calcining the precursor material to obtain the oxygen-doped carbon nitride catalyst. The method has the following advantages: (1) the synthesis process of the catalyst is simple, the raw materials for synthesizing the catalyst are cheap and easily available, the equipment requirement for synthesizing the catalyst is simple and convenient, and the operation is easy; and (2) the catalyst has excellent reaction catalytic performance for selective oxidation of sulfides, has good substrate adaptability, is easy to recycle and reuse, and still has high yield after being used for many times. And (3) the adaptability of photocatalytic heterogeneous oxidation to substrate expansion in drug molecules is rarely reported at present, and the invention provides an application method of a metal-free photocatalyst for efficiently and selectively oxidizing sulfide under the condition of no additional additive.

The invention relates to a coated substrate, preferably coated tool for use in manufacturing processes, such as machining processes or forming processes, comprising a coated surface, said coated surface formed by a substrate surface made of a first material (1) and a coating system, preferably an arc-PVD-deposited coating system, applied on said substrate surface, said coating system comprising an amorphous carbon film (100), wherein the amorphous carbon film (100) is a tetrahedral hydrogen-free amorphous carbon film in which the share of the sp3 bond percentages of the C—C bonds exceeds that of the sp2 bond percentages. The invention further relates to a method.

The invention discloses a zinc oxide modified silicon dioxide catalyst, a preparation method and application of the zinc oxide modified silicon dioxide catalyst in catalytic alcoholysis of waste PET (polyethylene terephthalate), zinc acetate and silicon dioxide are added into a mixed solution of water and ethanol and uniformly mixed, and a mixed reaction solution is obtained; adding a sodium hydroxide aqueous solution into the mixed reaction solution, carrying out a first reaction, and standing to obtain a suspension; and adding an L-ascorbic acid aqueous solution into the suspension, carrying out a second reaction, carrying out solid-liquid separation, and calcining the solid part in an air atmosphere to obtain the product. The prepared zinc oxide modified silicon dioxide nano material can be used as a catalyst to be applied to alcoholysis recovery of waste polyester, the product yield reaches up to 92% or above, the product selectivity is high, metal residues are avoided, the catalyst is easy to recover and can be recycled, and the application prospect is wide.

The invention discloses a self-healing high-temperature anti-oxidation carbon-ceramic composite material, belongs to the technical field of ceramic-based composite materials, and particularly relates to a method for introducing a self-healing metal-element-free high-temperature anti-oxidation ceramic matrix into a carbon fiber preform. Then introducing a resin carbon matrix and a self-healing inorganic filler through two times of vacuum impregnation and high-temperature cracking, and finally preparing the SiC matrix by adopting high-temperature siliconizing. The carbon-ceramic composite material prepared by the invention does not contain metal impurities, has a self-healing function, and has a long-life anti-oxidation function in a range of 700-1000 DEG C.

The invention is applicable to the technical field of organic photocatalysts, and provides a novel pillararene polymer material as well as a preparation method and application thereof. The metal-free organic catalyst polymer material TpAP [n] with semiconductor characteristics is designed and prepared by introducing supramolecular macrocyclic pillar aromatic hydrocarbon as a construction unit, the metal-free organic catalyst polymer material TpAP [n] is synthesized through a Schiff base condensation reaction, the unique interlayer ordered stacking limits the recombination of current carriers, an effective electron-hole transmission path is formed, and the metal-free organic catalyst polymer material TpAP [n] can be used for preparing a semiconductor material. More active sites are provided, and efficient contact between reactants and a catalytic center is facilitated. Experimental results show that the material can remarkably increase the generation rate of H2O2 under the illumination condition and shows excellent photocatalytic performance, the preparation process is environmentally friendly and conforms to the green chemistry principle, and a support and a theoretical basis are provided for design and preparation of subsequent series of metal-free organic catalysts.

The invention provides a fiber type polyionic liquid catalyst and a preparation method and application thereof, the fiber type polyionic liquid catalyst is prepared by spinning a precursor solution, and the precursor solution is prepared by dissolving an ionic liquid monomer, an initiator, a cross-linking agent and a polymer raw material in a solvent and mixing. A specific precursor solution is spun to obtain a polyion liquid catalyst with a fiber structure and high porosity, and the polyion liquid catalyst has a microporous network, can enhance gas and mass transport, enables catalytic active sites to be effectively exposed, and can catalyze CO2 cycloaddition to generate cyclic carbonate under the mild conditions of no metal, no catalyst promoter and no solvent; and the catalyst has high catalytic activity and good cycle performance. The fiber type polyion liquid catalyst has processability, can still keep high catalytic activity after continuously catalyzing CO2 cycloaddition reaction for 1000 hours in micro continuous flow reactors (such as fixed beds) and the like, and has a wide industrial application prospect.

The invention discloses a method for preparing p-dioxanone from diethylene glycol, which comprises the following steps: by taking diethylene glycol (DEG) as a raw material, 2, 2, 6, 6-tetramethylpiperidine oxide (TEMPO) as a catalyst and trichloroisocyanuric acid (TCCA) as an oxidant, reacting in a solvent in the presence of an acidic material and inert gas to obtain the p-dioxanone. The invention provides a novel method for preparing p-dioxanone. A target product is obtained through one-step oxidative cyclization of diethylene glycol. Wherein the required raw materials are easy to obtain and low in price, no metal participates in catalysis, the yield is good, the reaction conditions are mild, and the method has industrial prospects.

The invention provides an antibacterial finishing agent and a preparation method and application thereof, and belongs to the technical field of textile assistants, the antibacterial finishing agent comprises the following raw materials: a chitosan-phytic acid-gallic acid graft copolymer, a citric acid-chitosan oligosaccharide cross-linking agent, sodium polyglutamate, a natural surfactant and water. During application, a padding-baking process is adopted, the finishing agent is diluted into 5-20 g / L working solution, the pH is 6-6.5, two times of padding and two times of rolling are performed, pre-drying is performed for 2-3 min at the temperature of 90-100 DEG C, baking is performed for 2-3 min at the temperature of 150-160 DEG C, an antibacterial layer which is resistant to washing more than or equal to 50 times and has the antibacterial rate more than or equal to 90% can be formed on pure cotton, pure hemp, pure silk and blended fabric thereof, and the finished fabric is soft in hand feeling, free of metal residues and biodegradable.

The invention belongs to the technical field of inorganic nano materials and electro-catalysis, and particularly relates to a cobalt-based spinel oxide nano material as well as a preparation method and application thereof. The cobalt-based spinel oxide nano material comprises a conductive substrate and cobalt-based spinel oxide grown on the surface of the conductive substrate, the molecular formula of the cobalt-based spinel oxide is MxCo1-xO4, and M is transition metal or P-region metal and is selected from one or more of titanium, vanadium, chromium, manganese, iron, nickel, aluminum, cerium and neodymium. Multiple metal elements are doped into a cobaltosic oxide lattice, and the intrinsic structure of spinel is not changed by metal doping. Multiple metal elements are highly uniformly dispersed in the material, so that active sites are comprehensively regulated and controlled, the material shows excellent thermodynamic and chemical stability under harsh conditions of high temperature, large current, concentrated alkali and the like, is suitable for various electrolysis modes, has no metal dissolution risk in long-term operation, can effectively avoid the problems of membrane poisoning and membrane degradation, and has good application prospects. Wide application prospects are shown.

The invention discloses an application of a SiC QDs catalyst in a photocatalytic benzylamine oxidative coupling reaction. The catalyst takes SiC as a raw material. The preparation method specifically comprises the following steps: dispersing SiC in a hydrofluoric acid-nitric acid mixed aqueous solution, heating to 100 DEG C in a hydrothermal kettle, maintaining for 1-6 hours, taking out, cooling to room temperature, diluting with deionized water, carrying out ultrasonic oscillation, carrying out centrifugal acid removal to obtain neutral large particles, dispersing into deionized water, carrying out ultrasonic treatment, centrifuging, taking supernatant, and carrying out freeze drying treatment to obtain the SiC-based composite material. The SiC QDs catalyst is obtained. By applying the SiC QDs catalyst, the benzylamine can be efficiently subjected to photocatalytic oxidative coupling in an air atmosphere. Compared with the traditional metal photocatalyst, the metal-free nano photocatalyst prepared by the method has the advantage that the catalyst cost is greatly reduced.

The invention discloses a synthesis method of an oxazole derivative, and belongs to the technical field of chemical synthesis. The oxazole derivative is synthesized from a ketone ester compound and thiourea through a one-pot method, the required raw materials are cheap and easy to obtain, the experimental operation is simple, the reaction condition is mild, a metal catalyst and other reagents are not needed, and the defects that a metal catalysis synthesis method is used, for example, the catalyst is high in price, the reaction synthesis route steps are many, and the synthesis cost is low are overcome. The method has the advantages of mild reaction conditions, low reaction rate, unstable intermediate, low yield and the like, bypasses most complex synthesis steps of a metal-free catalytic synthesis method, and develops a simple, efficient, green and environment-friendly way for synthesizing the oxazole derivative. Under mild conditions, ketone ester substrates with different substituent groups have very strong compatibility, and a new green synthesis way is provided for synthesis of substituted oxazole.

The invention discloses a metal-free catalyst, a preparation method and application of the metal-free catalyst in preparation of benzyl alcohol through transfer hydrogenation of biomass-based benzaldehyde, and the catalyst is a nitrogen-doped carbon catalyst; in the catalyst, nitrogen is used as a Lewis alkaline site, and does not contain a Lewis acidic site and a # imgabs0 # acidic site. According to the preparation method of the metal-free nitrogen-doped carbon-based catalyst, the metal-free nitrogen-doped carbon-based catalyst (MF-NC) can be prepared through solvothermal self-assembly and pyrolysis processes by virtue of a structure regulator and taking a ZIF material as a sacrificial template, the preparation process is simple, the surface appearance is controllable, and the metal-free nitrogen-doped carbon-based catalyst has a relatively high specific surface area. The obtained MF-NC can efficiently and selectively convert benzaldehyde into benzyl alcohol through a Lewis alkaline site mediated MPV transfer hydrogenation reaction by taking cheap and renewable bioethanol as an in-situ hydrogen donor and a reaction solvent.

The invention discloses a high-performance copper-free resin-based braking material prepared from red mud. The high-performance copper-free resin-based braking material is prepared from the following raw materials in percentage by mass: 30-40 wt% of red mud, 15-25 wt% of resin, 5-9 wt% of bamboo fibers, 15-25 wt% of aluminum oxide, 0-20 wt% of barium sulfate, 5 wt% of tire powder and 3 wt% of graphite. The red mud is adopted to replace copper which is harmful to the environment and high in cost in the brake material, the heat fading resistance of the friction material is improved due to the fact that the red mud has good high-temperature volume stability, and the material cost is effectively reduced while non-metallization of the brake material is achieved. The method has important significance on green and sustainable development of the aluminum manufacturing industry and the braking material industry in China, and has good engineering application value and remarkable economic benefits.

The invention discloses a method for synthesizing a polysubstituted trifluoromethyl olefin compound from gem-difluoroallyl alcohol. The preparation method comprises the following steps: in a nitrogen (N2) atmosphere, sequentially adding a gem-difluoroallyl alcohol (R1R2OHCR3C = CF2) compound, acetic anhydride (Ac2O), a solvent dichloromethane (DCM) and a fluorine source pyridine hydrofluoride (Py.9HF) reagent into a 10mL Schlenk tube to obtain a mixture, stirring the mixture at room temperature (rt) until the reaction is finished, filtering, washing and drying to obtain the compound. A crude product obtained by the reaction is subjected to silica gel column chromatography separation to obtain the high-selectivity polysubstituted trifluoromethyl olefin compound. The preparation method disclosed by the invention can be carried out under mild conditions and is simple and convenient to operate, most of the adopted raw materials are simple and easily available or commercialized reagents, the reaction raw materials are easily available, the yield of the target product is high, the functional group compatibility of the product is good, and the application range of a substrate is relatively wide; the obtained polysubstituted trifluoromethyl olefin compound contains a plurality of functional groups such as trifluoromethyl, olefin and the like. The method provides a more efficient and safer new strategy for synthesizing the polysubstituted trifluoromethyl olefin under mild conditions, particularly, metal participation is avoided, a new opportunity is provided for green medicine synthesis, and the method is predicted to have wide application prospects in the fields of medicine research and development, natural product derivative synthesis, life science and the like.

The invention relates to the technical field of wall construction, and discloses a technological construction method of a metal facing and thermal insulation layer composite wall, which comprises the following steps: selecting a thermal insulation layer material: adopting a composite thermal insulation material with low thermal conductivity, good waterproofness and higher toughness, such as high-performance polyurethane foam or polystyrene foam, so that the thermal insulation performance is better; by optimizing the material of the thermal insulation layer and selecting the metal veneer, the thermal insulation performance of the wall body is greatly improved, the thermal bridge effect can be effectively reduced, the temperature stability of a building in different seasons is ensured, and therefore the energy consumption of an air conditioner and heating is reduced, and the energy-saving effect is achieved. And secondly, a metal-contact-free design and a floating connection mode are adopted, so that the problems of thermal bridge and structural deformation are effectively eliminated, and the overall thermal insulation performance and crack resistance of the wall body are improved. In addition, due to the built-in damp-proof layer and the waterproof design, the heat preservation layer is prevented from being affected with damp, the service life of the wall is prolonged, and the risks of corrosion and mildew are reduced.

The present invention relates to a method for achieving efficient electrocatalytic hydrogenation using a metal-free heterocyclic molecular catalyst. The method comprises using a five-membered or six-membered heterocyclic organic compound as the metal-free molecular catalyst, assembling an electrolytic cell using a gas diffusion electrode loaded with the metal-free molecular catalyst as the cathode and a corresponding anode, and an anion exchange membrane (or proton exchange membrane) as the cathode and anode separator, to perform the electrocatalytic semi-hydrogenation of alkynes. The method achieves activity and selectivity comparable to or even exceeding that of conventional metal catalysts during the electrocatalytic hydrogenation process.

Carbon fibers as fabric or roving as electrode material for the electrolysis of water.

The application belongs to the field of medicine synthesis, and particularly relates to a preparation method of mesopram racemate. First, 1-(4-methoxy-3-propoxyphenyl) ethan-1-one, methyl triphenylphosphonium bromide and alkali are reacted in a solvent under inert gas protection to obtain a styrene intermediate I; then the intermediate I, a BocNCl2 reagent and an alkali reagent are reacted in a solvent to generate the mesopram racemate. The method provided by the application has the advantages of short steps, low cost, no metal residue and mild reaction conditions, and is suitable for industrial production.