76 results about "Para-Benzoquinone" patented technology

The application discloses a method for realizing resource utilization of phenol pollutants in water by using a nickel-ruthenium hybrid electrocatalyst, and belongs to the technical field of environmental electrocatalytic water treatment. The nickel-ruthenium hybrid electrocatalyst loaded on carbon cloth is prepared by using a simple two-step electrodeposition method, aiming at problems such as high energy consumption, high material consumption and high carbon emission of a traditional wastewater treatment mode. The catalyst has high stability and high selectivity, and can realize directional conversion of phenol pollutants in water into high-value p-benzoquinone under mild conditions, so as to simultaneously realize removal of the phenol pollutants in water and recovery of high-value-added chemicals. The application provides a new method for treatment and resource utilization of high-concentration phenol wastewater.

The invention discloses a method for preparing p-benzoquinone through selective electrocatalytic oxidation of phenol by using a carbon cloth loaded ferronickel catalyst, the method adopts the carbon cloth loaded ferronickel catalyst as an anode to realize efficient conversion of phenol in an aqueous solution into p-benzoquinone, and the product is only p-benzoquinone. The method has the advantages of simple operation process, mild reaction conditions, high catalytic activity, high chemical selectivity and high target compound yield. The p-benzoquinone is prepared by oxidizing phenol in an alkaline environment, so that the use of toxic and harmful chemical oxidants is avoided, the pollutant emission is reduced from the source, and the method is an environment-friendly synthesis process and conforms to the development concept of green chemistry.

The application provides a synthesis method of p-benzoquinone dioxime. The synthesis method comprises the following steps: (1) adding solid acid into an ethanol solution of phenol to obtain a mixed solution A, then vacuumizing and filling with inert gas; dissolving nitrite into ethanol, uniformly mixing to obtain an ethanol solution of nitrite, then vacuumizing and filling with inert gas; in an inert gas atmosphere, adding the ethanol solution of nitrite into the mixed solution A dropwise to perform nitrosation reaction, to obtain a reaction liquid B; in the inert gas atmosphere, adding an ethanol solution of hydroxylamine into the obtained reaction liquid B to perform oximation reaction; after the reaction is completed, filtering the obtained reaction liquid C, performing reduced pressure distillation on the obtained filtrate, and performing washing, filtering and drying on the obtained residual liquid of the reduced pressure distillation, to obtain p-benzoquinone dioxime. The method provided by the application reduces the occurrence of side reactions, improves the conversion rate of the reaction, and improves the yield and purity of p-benzoquinone dioxime.

This invention provides a method for preparing dibenzoyl-p-benzoquinone dioxime using a microchannel reactor. The method includes the following steps: 1,3-dicyclohexylcarbodiimide and a catalyst are mixed uniformly and preheated to obtain a premix; a chloroform solution of p-benzoquinone dioxime, a chloroform solution of benzoic acid, and the premix are simultaneously introduced into the microchannel reactor for reaction; the resulting reaction solution is subjected to vacuum distillation, washing, filtration, and drying to obtain dibenzoyl-p-benzoquinone dioxime. The synthesis method of this invention features high reaction conversion rate, high production efficiency, few side reactions, and high safety. The obtained dibenzoyl-p-benzoquinone dioxime product has stable quality. Furthermore, the organic solvent used can be recovered and reused after vacuum distillation, overcoming the problems of inaccurate temperature control, poor safety, numerous side reactions, and difficult waste treatment in traditional processes. This provides a new approach for the synthesis of dibenzoyl-p-benzoquinone dioxime.

The invention belongs to the technical field of compositions of high-molecular compounds, and particularly relates to a rubber composite material as well as a preparation method and application thereof. The rubber composite material is prepared from the following components in parts by mass: 85-92 parts of rubber powder, 1-2 parts of an ethylene-vinyl acetate copolymer, 1.2-1.8 parts of epoxidized natural rubber, 1-3.5 parts of an activating agent, 3-6 parts of a modifying agent, 1.5-3 parts of a bulking agent and 0.5-1 part of a compatibility accelerant, the modifying agent is prepared by compounding disulfide-bismaleimide ethane, p-benzoquinone dioxime, hydrogenated castor oil and hyperbranched polyglycidyl ether; the preparation method comprises the following steps: mixing all the components to prepare the rubber composite material; the application comprises the following steps: heating the asphalt, adding the rubber composite material, uniformly mixing, and shearing to obtain the rubber modified asphalt. When the rubber modified asphalt is prepared, the compatibility of the asphalt and the rubber powder is effectively improved in a high-mixing-amount environment of the rubber powder by adding a modifying component.

The application discloses a vegetable oil-based self-repairing photo-thermal response shape memory polymer, a preparation method and application thereof, and relates to the technical field of shape memory polymers. In a first step, oleic acid, formic acid and hydrogen peroxide are reacted to obtain an intermediate product A by using p-toluenesulfonic acid as a catalyst; in a second step, the obtained intermediate product A is reacted with hexamethylene diisocyanate and p-benzoquinone dioxime to obtain an intermediate product B; and in a third step, epoxy resin and an epoxy resin accelerator are added and heated to be cured to obtain the vegetable oil-based self-repairing photo-thermal response shape memory polymer. The oxime-urethane dynamic bond and the ester exchange dynamic bond in the vegetable oil-based self-repairing photo-thermal response shape memory polymer prepared by the application can endow the prepared polymer with excellent self-repairing ability and shape memory performance. The polymer is prepared by using a bio-based material, the process is simple, the mechanical performance is controllable, the self-repairing and shape memory functions can be realized under the condition of ultraviolet light excitation and heating, and the shape memory performance and mechanical performance loss after repeated use is small.

The invention provides an inorganic matter and cationic organic matter compounded clay stabilizer for water injection, and discloses that trimethyl monoallyl ammonium chloride is used as a raw material, and polymerization in the use process is prevented after a p-benzoquinone polymerization inhibitor is added, so that cationic monomer micromolecules containing double bonds are used as an organic clay stabilizer, and the stability of the organic clay stabilizer is improved. When being used together with the same raw material cationic organic matter with small molecular weight, namely 2-hydroxyethyl trimethyl ammonium chloride, the clay swelling prevention agent has the performance of preventing clay swelling, anti-scouring capability and long-term effect, and has better performance of preventing clay swelling after being compounded with cheap inorganic raw materials, namely aluminum chloride, dipotassium phosphate and industrial ammonium chloride; the prepared clay anti-swelling agent compounded by the inorganic matter and the cationic organic matter not only has excellent capacity of preventing clay swelling, but also has good anti-scouring capacity and good washing resistance, and an innovative demonstration effect is achieved for preventing damage of clay swelling and migration to a reservoir in water injection and improving the water injection recovery ratio.

This invention discloses a method for the integrated management of the endangered plant *Gnaphalium affine* and medicinal plants. The method involves calculating the N / P ratio of the leaves of the *Gnaphalium affine* to be planted and the total nitrogen value of the soil. When the N / P ratio is ≤16 and the total nitrogen value is <5 g / kg, organic fertilizer is applied to the soil; when the N / P ratio is >16 and the total nitrogen value is >5 g / kg, phosphorus fertilizer is applied to the soil. *Spatholobus suberectus* seedlings or *Cassia tora* seedlings are treated with a 2,6-dimethoxy-p-benzoquinone solution before being transplanted near the *Gnaphalium affine* seedlings. Field management is then carried out, and the *Spatholobus suberectus* vines are harvested in the third year, or the *Cassia tora* seeds are harvested annually. This method addresses the problems of N / P imbalance and seedling stunting in *Gnaphalium affine* by targeting the N / P ratio of the seedling leaves and the total nitrogen value of the soil with phosphorus or nitrogen fertilizer, thus improving the survival rate of *Gnaphalium affine* seedlings. By selecting *Spatholobus suberectus* and *Cassia tora* as the integrated management targets for *Gnaphalium affine*, this method overcomes the difficulty of low economic benefits in integrated management of *Gnaphalium affine*, thereby increasing the economic returns for growers.

The application provides a preparation method of dibenzoyl-p-benzoquinone dioxime. The method comprises the following steps: (1) adding a heteropoly acid catalyst into an ethanol solution of p-benzoquinone dioxime to obtain a mixed solution; (2) adding an ethanol solution of benzoic acid into the obtained mixed solution, and then performing a reaction; after the reaction is completed, filtering the obtained reaction liquid, drying and screening the obtained filter residue to obtain dibenzoyl-p-benzoquinone dioxime. The method uses p-benzoquinone dioxime and benzoic acid as raw materials, uses ethanol as a reaction solvent, uses a heteropoly acid as a catalyst for a condensation reaction, and synthesizes dibenzoyl-p-benzoquinone dioxime in one step. The solvent ethanol used in the method can be recovered and reused through reduced pressure distillation, and the catalyst heteropoly acid can be recycled and reused after being filtered, so that the output of acidic production wastewater is reduced, the generation of strong corrosive hydrogen chloride gas is avoided, and the green environmental protection requirement is met.

The invention discloses a preparation method and application of nitrogen-oxygen co-doped graded porous carbon, the method takes 2, 3, 5, 6-tetra (amino) p-benzoquinone as a carbon precursor and a nitrogen doping agent and potassium trimesic acid as an activating agent and a confinement template, the method comprises the following steps: firstly, grinding and uniformly mixing the 2, 3, 5, 6-tetra (amino) p-benzoquinone and the potassium trimesic acid, transferring into a magnetic boat, then putting into a tubular furnace, and carrying out heat preservation for 2-4 hours; under the protection of argon, heating is performed to prepare the nitrogen-oxygen co-doped hierarchical porous carbon, and the obtained nitrogen-oxygen co-doped hierarchical porous carbon has proper nitrogen-oxygen content and rich hierarchical pore structures. 2, 3, 5, 6-tetra (amino) p-benzoquinone is taken as a carbon precursor and a nitrogen doping agent, potassium trimesic acid is taken as an activating agent and a confinement template, nitrogen-oxygen co-doped hierarchical porous carbon is directly constructed by adopting a one-step method, the specific surface area is between 1321.76 and 1789.52 m < 2 > / g, and the total pore volume is between 0.85 and 1.25 cm < 3 > / g; when the material is used as the positive electrode material of the zinc ion hybrid capacitor, the specific capacitance is 205.02 mAh / g under the current density of 0.1 A / g, and the energy density is up to 182.45 Wh / kg.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

The invention relates to the technical field of preparation of metal organic composite materials, in particular to a copper-tetracyano p-benzoquinone dimethane metal organic composite material and a preparation method thereof.The preparation method comprises the steps that a Cu source and TCNQ are subjected to ball milling treatment in the absence of a solvent or under the action of the solvent, the Cu source and the TCNQ are subjected to a solid-phase charge transfer reaction, and the Cu source and the TCNQ are subjected to solid-phase charge transfer reaction; according to the copper-tetracyano p-benzoquinone dimethane metal organic composite material, a mechanochemical ball milling method is adopted, rapid coordination reaction of copper ions and TCNQ ligands is achieved under the solvent-free condition, and the copper-tetracyano p-benzoquinone dimethane metal organic composite material has the advantages of being simple in process, environmentally friendly, high in efficiency and the like.

This invention provides a metal-doped electrode and a method for the electrochemical oxidation of phenol to prepare p-benzoquinone. The metal-doped electrode comprises a conductive substrate material and lead, manganese, and ruthenium metals attached to the surface of the conductive substrate material, wherein the mass ratio of lead, manganese, and ruthenium is 60-95%:2-25%:2-15%. The method for the electrochemical oxidation of phenol to prepare p-benzoquinone uses the metal-doped electrode of this invention as the anode and a lead electrode as the cathode in a two-chamber electrolytic cell containing a diaphragm, and electrolyzes phenol to prepare p-benzoquinone under acidic conditions. The electrode of this invention is corrosion-resistant under acidic conditions and has a long service life. Current density >4000 A / m 2 By controlling the current density, the selectivity of benzoquinone is >90%. The electrode materials used are inexpensive and readily available, the electrochemical process is simple, and the process is safe and reliable, showing great promise for industrialization.

The invention discloses a method for reducing hexavalent chromium by using tire rubber additive-quinone derivative reinforced shewanella, and the method comprises the following steps: S1, preparing an N-(1, 3-dimethylbutyl)-N '-phenyl p-benzoquinone concentrated solution; s2, a culture medium is prepared, Shewanella oneidensis MR-1 is activated, and a bacterial suspension is obtained; and S3, the N-(1, 3-dimethylbutyl)-N '-phenyl p-benzoquinone concentrated solution is used for strengthening Shewanella oneidensis MR-1, and hexavalent chromium is reduced. In order to solve the problem of low removal efficiency of high-concentration Cr (VI), the invention provides a method for accelerating the reduction of Cr (VI) by S.oneidensis MR-1 by using the electron shuttle characteristic of 6PPD-Q, and the method has potential environmental restoration and application values.

A method for preparing and applying a silicone rubber / crosslinked polyethylene composite dielectric for cable accessories is disclosed, belonging to the field of composite dielectric preparation methods and applications. The purpose of this invention is to solve the problem in existing technologies where, with long-term cable operation, silicone grease diffuses into the silicone rubber, causing swelling, leading to a decrease in the insulation performance of the silicone rubber and an increase in the failure rate. The method includes: 1. Preparing silicone rubber; 2. Preparing crosslinked polyethylene; 3. Preparing a doped and modified silicone grease; 4. Coating the modified silicone grease onto the surface of the silicone rubber, and then covering it with crosslinked polyethylene. 2,3,5,6-Tetrafluoro-7,7',8,8'-Tetracyanodimethyl-p-benzoquinone is introduced into the silicone grease as a filler to construct carrier traps, hindering carrier injection and transport. Under the synergistic effect of this filler and silicone grease, intermolecular forces are enhanced, silicone grease slippage is reduced, and thus the electrical insulation properties of the silicone rubber-crosslinked polyethylene composite interface are further increased.

The invention discloses an anti-corrosion coating material based on a metal coordination structure and a preparation method and application thereof, and the anti-corrosion coating material is characterized in that a metal coordination polymer containing a dihydroxy p-benzoquinone (DHBQ) ligand is introduced on the basis of a traditional metal zinc anti-corrosion system, and a stable coordination compound Co (dhbq) (at) Zn is formed through self-assembly. Due to the fact that the metal coordination polymer Co (dhbq) has the highly ordered and compact structural characteristic and the dynamic response performance of reversible coordination bonds, on one hand, a compact barrier layer can be effectively constructed, and permeation of corrosive media is prevented; and on the other hand, the dynamic reversible metal coordination bond can be spontaneously reconstructed under environmental stimulation after the coating is damaged, so that in-situ self-repairing of the metal surface is realized. The anticorrosive coating material disclosed by the invention not only can obviously inhibit the expansion of corrosion, but also can effectively prolong the service life of a metal zinc coating, improve the long-term protection efficiency of a whole coating system, and provide a lasting, efficient and green anticorrosive solution for a protected metal material.

The present invention relates to microbial metabolites and their application technology in the research field of agricultural fungal control drugs, specifically an application of a chloro-p-benzoquinone compound. The application of a chloro-p-benzoquinone compound as a new control drug for agricultural fungi. The chloro-p-benzoquinone compound is 2-chloro-5-methoxy-3-methylcyclohexa-2,5-diene-1,4-dione, as shown below #imgabs0# The chloro-p-benzoquinone compound involved in the present invention (as shown in structural formula I) can be used as a new drug ingredient or lead compound for resisting agricultural fungi. The chloro-p-benzoquinone compound involved in the present invention has significant anti-agricultural fungal activity, and its mechanism of action can be further explored in order to develop it into a new pesticide or its lead compound.

The invention discloses a high-wear-resistance and corrosion-resistance sintering machine grate and a preparation method thereof, and belongs to the technical field of metallurgical materials. The method comprises the following steps: selecting polystyrene foam plastic to prepare a foam model; the preparation method comprises the following steps: preparing high-entropy oxide nano powder from ferric nitrate, chromic nitrate, nickel nitrate, manganous nitrate and ammonium molybdate according to a mass ratio, stirring, precipitating, drying, calcining and ball-milling to obtain powder; preparing a water-based binder from polyvinyl alcohol, hydroxypropyl methyl cellulose, lauryl sodium sulfate, p-benzoquinone imine and deionized water according to a mass ratio; preparing an inner-layer coating solution from high-entropy oxide nano powder and a binder in proportion, dip-coating the foam model, and drying to form an inner layer; preparing an outer layer coating solution from nano chromium powder and a binder according to a ratio, and performing dip-coating and drying to form an outer layer; filling refractory sand, pouring high-chromium cast iron alloy melt, and demolding; and tempering at low temperature and strengthening the nano permeation layer. The grate substrate and the double-layer nano coating are cooperated, so that the service life is prolonged, and the cost is reduced.

The invention relates to the technical field of corrosion inhibitors, in particular to a nitrogen-phosphorus-fluorine ternary doped carbon quantum dot corrosion inhibitor and a preparation method and application thereof. According to the specific technical scheme, the preparation method of the nitrogen-phosphorus-fluorine ternary doped carbon quantum dot corrosion inhibitor comprises the steps that a mixed reaction system of tryptophan and / or a tryptophan derivative, tetrafluorop-benzoquinone, phosphoric acid and a solvent is subjected to a hydrothermal reaction for 4-8 h at the temperature of 160-240 DEG C, and the nitrogen-phosphorus-fluorine ternary doped carbon quantum dot corrosion inhibitor is obtained. The tryptophan and / or the tryptophan derivative, the tetrafluoro p-benzoquinone and the phosphoric acid are subjected to a hydrothermal reaction, and the prepared corrosion inhibitor is good in water solubility and excellent in corrosion resistance, can be applied to the industries such as metal, chemical engineering, petroleum, electric power, papermaking, oil refining, ships, storage and traffic, and has wide application prospects. The corrosion inhibitor is particularly expected to be applied to large equipment such as chemical equipment, metal equipment, petroleum and offshore platforms, and the service life of a matrix can be prolonged when the corrosion inhibitor is applied to the surface of the metal matrix.

This invention discloses a near-infrared photoresponsive Cu2O powder photothermal material and its preparation method. Specifically, copper compound powder is added to deionized water and ultrasonically dissolved to form a copper ion aqueous solution. Ethanol is then added and mixed to obtain solution A. Sodium hydroxide powder is added to deionized water and ultrasonically dissolved to form a sodium hydroxide aqueous solution. Ethanol is then added and mixed to obtain solution B. Solution A is stirred and heated, followed by the addition of p-benzoquinone powder to react. Solution B is then added, and the reaction continues. After centrifugation, washing, and drying, the near-infrared photoresponsive Cu2O powder photothermal material is obtained. This invention uses a simple liquid-phase reduction method to prepare Cu2O powder photothermal materials with excellent photothermal performance under near-infrared light irradiation at low temperatures. This preparation method has advantages such as wide availability of raw materials, mild reaction conditions, simple operation, short process flow, and suitability for industrial production.

The present invention belongs to the field of new chemical power sources and relates to a layered bi-tetraaminobenzoquinone organic electrode material and its preparation method and application. The chemical formula of the material is C 12 H8N6O4 has a highly ordered layered structure with an interlayer spacing of 0.02-0.03μm, and has terminal amino groups, p-benzoquinone and pyrazine. The preparation method is to dissolve tetraamino-p-benzoquinone and a soft template in an organic solvent to form a uniform mixed solution, heat it to 100-150°C and react for 12-24 hours, cool it, wash the solid, and filter it to obtain a layered bis-tetraamino-p-benzoquinone organic electrode material. This material can be used in a variety of ion battery systems including lithium ions, sodium ions, and zinc ions. The present invention achieves a high degree of ordering of the crystal structure and full exposure of the active sites of the functional groups through morphology control technology, significantly improving the cycle stability and reversible specific capacity, and the mass energy density is superior to that of traditional inorganic positive electrode materials.

The invention relates to the technical field of ternary organic solar cells, in particular to a high-efficiency ternary organic solar cell active layer and a preparation method thereof.A modular monomer library containing a p-benzoquinone-benzidine structure is constructed, the monomer library comprises three monomers M1, M2 and M3, third components P1, P2 and P3 are synthesized through functional group regulation and control and a one-step polymerization process, and the third components P1, P2 and P3 are synthesized through a one-step polymerization process; a ternary blending active material for constructing an intermediate coating of a device is prepared, in a final assembly structure of the device, the upper layer is PNDIT-F3N, the middle layer is a ternary active layer obtained by blending P1, P2, P3, D18 and L8-BO, and the lower layer is PEDOT: PSS. Through structural regulation and control of a dynamic adjustable monomer library, one-step synthesis of three differentiated third components is realized, and the preparation process is simple and convenient. Complex modification or noble metal catalysts are not needed, so that the cost is reduced.

The patent relates to a method for preparing marine terpenoid natural products based on a decarboxylation coupling reaction of carboxylic acid salt of sclareolide or carboxylic acid of sclareolide and quinone compounds, and belongs to the field of chemical synthesis. The method takes sclareolide as raw material, and realizes, for the first time, a Minisci decarboxylation coupling reaction of carboxylic acid salt of bicyclic sesquiterpene or carboxylic acid of sclareolide and p-benzoquinone promoted by Selectfluor, so that the synthesis steps of yahazunone are shortened from the previous 6-18 steps to 2 steps, and asymmetric synthesis of multiple yahazunone natural products is realized. The method has the characteristics of good step economy, simple operation and suitability for industrial production.

The invention belongs to the field of metal zinc ion battery electrode materials, and particularly discloses a hydroxyl-containing multi-active-site quinone organic electrode material and application thereof in a metal zinc ion battery. The hydroxyl-containing multi-active-site quinone organic electrode material is obtained by reaction of 2, 3-diamino-1, 4-naphthoquinone and 2, 5-dihydroxyl p-benzoquinone, and the structural formula of the hydroxyl-containing multi-active-site quinone organic electrode material is shown in the specification. When the hydroxyl-containing multi-active-site quinone organic compound is used as a zinc ion battery electrode material, the initial specific capacity as high as 640 mAh / g can be realized, the specific capacity as high as 210 Ah / g can be realized under the conditions of 1.8 V high voltage and 20 A / g large current density, and the total number of stable cycles exceeds 3500. The hydroxyl-containing multi-active-site quinone organic electrode material provided by the invention has a relatively good application prospect in a metal zinc ion battery system.

The invention belongs to the technical field of synthesis and application of new compounds, and discloses a quinoline or pyridine meta-position trifluoroacetyl substituted compound, a synthesis method and application, the method comprises the following steps: by using a quinoline or pyridine compound as a raw material, tetrahydrofuran as a solvent, trifluoroacetic acid or acetic acid as an acid and boron trifluoride diethyl etherate as an auxiliary agent, carrying out a one-step reaction to obtain a quinoline or pyridine meta-position trifluoroacetyl substituted compound; the method comprises the following steps: reacting quinoline or pyridine as a raw material with tert-butylmagnesium chloride and trifluoroacetic anhydride to obtain a dihydroquinoline or dihydropyridine intermediate, and then removing tert-butyl from the intermediate under the action of concentrated hydrochloric acid or acetic acid and an oxidizing agent 2, 3-dichloro-5, 6-dicyan p-benzoquinone or potassium permanganate to realize quinoline or pyridine meta-position trifluoroacetyl substitution. The method has the advantages of rapidness, high efficiency, wide substrate range, cheap and easily available reaction substrates and the like. The method provides a convenient, efficient and practical method for synthesizing the meta-position trifluoroacetyl quinoline or pyridine compound.

The application relates to a synthesis method of 2-(trifluoromethyl)thiazole compounds, characterized in that the synthesis method uses a thiazole compound without substitution at the 2 position as a raw material, cuprous chloride as a catalyst, p-benzoquinone as an oxidant, (trifluoromethyl)trimethylsilane as a trifluoromethylating reagent in the presence of a base, and high-selectivity 2-(trifluoromethyl)thiazole compounds are generated. The synthesis method not only uses cheap and easily-obtained catalysts and oxidants, and does not need ligands, but also realizes the C-H bond activation trifluoromethylation which is difficult to realize in the prior art. The synthesis method is high in atom economy, simple and easy to operate, high in regioselectivity, and suitable for industrial scale production.

The present invention belongs to the technical field of electrolytic preparation and discloses a method for preparing high-concentration hydroquinone by electrolyzing phenol. The method comprises: adding a sulfuric acid aqueous solution to the anode chamber and cathode chamber of an H-type electrolytic cell, adding phenol to the anode chamber, and applying electricity for electrolysis to obtain a sulfuric acid solution containing p-benzoquinone; extracting the sulfuric acid solution containing p-benzoquinone to obtain a p-benzoquinone organic solution and a sulfuric acid solution circulating in the anode chamber; adding a sulfuric acid aqueous solution to the anode chamber and cathode chamber of another H-type electrolytic cell, adding the p-benzoquinone organic solution to the cathode chamber, and applying electricity for electrolysis to obtain a sulfuric acid solution containing hydroquinone and a liquid separation extractant; repeatedly adding the obtained sulfuric acid solution containing hydroquinone to the cathode chamber, so that the hydroquinone obtained by reducing p-benzoquinone is enriched in the cathode chamber, thereby increasing the concentration of the hydroquinone product. The present invention can effectively increase the concentration of hydroquinone in the electrolyte.

The invention belongs to the technical field of catalytic materials, and discloses a rare earth doped catalyst, a preparation method thereof and application of the rare earth doped catalyst in oxygen evolution reaction. The preparation method of the rare earth doped catalyst comprises the following steps: in a protective gas atmosphere, mixing tetraamino p-benzoquinone, ferric chloride, rare earth salt and a solvent, then adding foamed nickel, heating for reaction, and separating to obtain the rare earth doped catalyst, the rare earth salt comprises cerium salt, erbium salt or lanthanum salt. The rare earth doped catalyst has good OER catalytic activity and high stability, does not contain precious metal, is low in cost, and has performance superior to that of commercial RuO2. The catalyst can be widely applied.

This invention discloses a method for preparing and applying highly dense silver-coated copper powder. The method comprises the following steps: First, in a first solvent, pretreated copper powder, a copper complexing agent, a dispersant, p-benzoquinone, and slow-release microspheres coated with a reducing agent are mixed, and the pH is adjusted to 10-11.5 to obtain a first mixture; then, silver ammonia solution is added, and the reaction proceeds to obtain a second mixture; wherein the redox potential during the reaction is 0.6-0.75V; finally, the second mixture is cooled, washed, and dried, and then processed by an air jet mill to obtain the final product. This method eliminates the need for a complex silver liquid / reducing agent dropwise control system, requiring only temperature and stirring control. The reaction endpoint is determined by monitoring the ORP, which helps reduce operational difficulty and uncertainty in industrial scale-up. Furthermore, the resulting silver-coated copper powder exhibits advantages such as high density and low volume resistivity.

The invention discloses a nitrogen heterocyclic ring-containing compound and a preparation method and application thereof, and the preparation method of the compound comprises the following steps: carrying out condensation reaction on 2, 5-diaminopyrimidine and 2, 6-dimethyl-4-nitrochlorobenzene under the action of alkali to obtain an intermediate 1; and introducing hydrogen into the intermediate 1 and 5-methyl-2-hexanone under the action of a catalyst to carry out reductive condensation reaction to obtain a product. The compound has a special structure, contains pyrimidine and benzene ring groups, has a good ozone protection effect when being used in rubber products, has different substituent groups on benzene rings, does not generate p-benzoquinone or o-benzoquinone toxic substances, is higher in environmental protection property and large in molecular weight, is not easy to discolor and emigrate when being used in the rubber products, and has a good application prospect. And the anti-aging agent has high application value in the aspect of aging resistance of rubber materials.