26 results about "Nitro compound" patented technology

The objective is to provide a solid electrolytic capacitor that has sufficient lifespan characteristics under high-temperature conditions. [Solution] A solid electrolytic capacitor is provided, having an anode foil, a cathode foil, and a separator between them, with an oxide film formed on their surfaces, and having an electrolyte portion in the gap between the anode foil and the cathode foil, wherein the electrolyte portion is composed of a solid electrolyte containing a conductive polymer compound, a polyanion dopant, an aromatic nitro compound having a polar group, and a secondary dopant as an optional swelling agent.

The application discloses a method for preparing aromatic amine compounds by in-situ generating iridium catalyst to reduce nitro, and belongs to the technical field of chemical synthesis. The method is that aromatic nitro compounds, soluble iridium salt precursors and a solvent are placed in a reaction container, hydrogen is replaced after stirring reaction under the conditions of 60 atm hydrogen pressure and 25-50 DEG C for 24-48 hours, and the aromatic amine compounds are separated after reaction is completed; the molar ratio of iridium element in the soluble iridium salt precursors to the aromatic nitro compounds is 1:1000-100000. The method adopts a one-pot feeding method, generates high-activity heterogeneous iridium particle catalyst in-situ in the reaction system by using the soluble iridium salt precursors, and simultaneously completes hydrogenation reduction of the nitro. The method simplifies the process, reduces the cost, optimizes the post-treatment mode, and the in-situ generated catalyst has high activity, good selectivity, can be used repeatedly, and the noble metal catalyst is convenient to recycle.

This invention discloses a method for in-situ detection of NO2 free radicals during the catalytic decomposition reaction of hydroxylamine nitrate, comprising three steps: reaction system construction, in-situ catalysis-capture, and analytical detection. Specifically: Step 1, reaction system construction: mixing a catalyst, an aqueous solution of hydroxylamine nitrate, and an electron-rich compound to form a reaction system; Step 2, in-situ catalysis-capture: placing the reaction system constructed in Step 1 under normal pressure and reacting within a temperature range of 20-100℃, allowing hydroxylamine nitrate to decompose under the action of a catalyst to generate NO2 free radicals, while the NO2 free radicals react with the electron-rich compound to generate nitro compounds; Step 3, analytical detection: qualitative analysis of the nitro compounds generated in Step 2 is performed using nuclear magnetic resonance spectroscopy, and quantitative determination is performed using a chromatographic instrument.

The application belongs to the field of fine chemical industry, and proposes a synthetic route for preparing aromatic diamine from anisyl alcohol through esterification, carbon-carbon (C-C) coupling, nitration and reduction process. In the route, anisyl alcohol is first subjected to esterification reaction to obtain anisyl formate, the formate intermediate is further catalytically converted into a dimer, then the dimer is subjected to nitration to obtain an aromatic dinitro compound, and the nitration product is finally subjected to reduction to obtain the aromatic diamine. The route has high carbon yield and economic value.

The application discloses taraxacum-derived carbon dots with tunable fluorescence and application thereof, and two kinds of carbon dots R-CDs and B-CDs with fluorescent colors can be obtained by high-temperature tuning with taraxacum as a carbon source, thereby creating conditions for double-channel fluorescence detection. The R-CDs can detect the percentage content of water in various organic solvents, and the test paper prepared can be repeatedly used for multiple times. The B-CDs are a multi-mode probe with fluorescence / colorimetric / absorption / RGB identification, and can simultaneously analyze and detect DNP in multiple ways. When a certain concentration of DNP is added into the B-CDs probe solution, a relatively significant fluorescence quenching phenomenon occurs, and the color of the solution becomes yellow. The specific detection of DNP is distinguished from other interfering components (metal ions, biological molecules and aromatic nitro compounds), and the detection method can be verified with each other, thereby improving the accuracy of detection. Meanwhile, the double-channel and multi-modal target detection is realized.

The application relates to the technical field of catalytic materials, and relates to an organic photocatalytic material and a preparation method thereof.1, comprising the following steps: mixing modified N-hydroxy phthalimide phenylacetate, an aliphatic nitroalkane, 2,6-dimethylpyridine, a photocatalyst and a solvent, then irradiating under visible light, placing in an inert atmosphere, stirring for 2-8 hours, and obtaining a product through post-treatment to obtain a final product; the mass ratio of the modified N-hydroxy phthalimide phenylacetate, the nitro compound, the 2,6-dimethylpyridine, the photocatalyst and the solvent is 2-5:1-2:1-3:1:8-11. The visible light catalysis method can be used to synthesize the nitro compound under mild conditions, and further provides a green and efficient new path for the preparation of a nitrogen-containing drug intermediate.

The application discloses a preparation method of a pyrrolidone derivative. Under the action of a non-precious bimetallic multifunctional catalyst, an acetylenic acid derivative shown in formula I is reacted with an amine, a nitro compound or a nitrile compound shown in formula II in a reaction solvent under the heating and stirring of hydrogen gas to prepare a pyrrolidone derivative shown in formula III, and a reaction formula is as follows: the non-precious bimetallic multifunctional catalyst is a nitrogen-doped carbon-based carrier NC derived from a metal-organic framework material ZIF-8 and an effective active ingredient embedded on the carrier NC; the effective active ingredient comprises two metals, one metal is Co, and the other metal is any one of Ni or Cu. The yield of the pyrrolidone derivative synthesized by the method can reach 77% to 100%. The method has the advantages of simple process, high selectivity of the target product, cleanness and environmental protection, small catalyst consumption, low cost, simple catalyst preparation, high catalytic stability and suitability for industrial production.

This invention relates to a 3-methyl-2-buten-1-aldehyde diisopentenyl acetal, comprising a nitro compound (calculated as NO2) with a mass content of less than 500 mg / kg. The 3-methyl-2-buten-1-aldehyde diisopentenyl acetal has high purity and good stability.

This utility model discloses an experimental device for disc granulation of nitro compound fertilizer, relating to the field of disc granulation technology. It includes a disc, with a mounting frame on the rear side of the disc. Rotating rods are fixedly connected to the left and right ends of the mounting frame, respectively. The ends of the two rotating rods that are farther apart are movably connected to corresponding positions on the upper part of a support. A round rod is fixedly connected to the middle of the rear surface of the disc. The rear end of the round rod passes through a round hole in the mounting frame and is fixedly connected to a power mechanism. The power mechanism drives the disc to rotate. A gear is fixedly connected to the rotating rod on the right side, and a gear two meshes with the lower side of the gear one. The left end of a handle is fixedly connected to the middle of the right end of the gear two. The handle is rotatably connected to a corresponding position on the right side surface of the support. An adjustment mechanism is connected to the lower end of the support, allowing adjustment of the disc's angle and position according to actual conditions to achieve the most suitable position for granulation.

The present application relates to the technical field of catalyst, in particular to a preparation method and application of a nitro compound hydrogenation catalyst. The present application first prepares a catalyst prepared from a nickel salt, a cobalt salt and a carrier, and is used in the hydrogenation reaction of nitrobenzene, and through the nickel-cobalt bimetallic catalysis, the cost of the nitrobenzene selective hydrogenation catalyst is reduced while the catalytic activity is ensured. The reaction for preparing arylamine compounds from nitro compounds in the present application does not require high reaction temperature and reaction pressure, is friendly to the environment, has high raw material conversion rate and high product yield. The present application prepares a supported catalyst, which is applied to the reaction for preparing arylamine compounds from nitro compounds, and the reaction condition is mild and easy for industrial production; the supported catalyst of the present application has the characteristics of simple preparation method and reusability.

This invention discloses a method for synthesizing amino compounds from nitro compounds using a flow-through membrane electrode electrolysis cell. The method involves electrochemically catalyzing the reduction of nitro compounds to amino compounds in a constant-current electrolysis mode within the flow-through membrane electrode electrolysis cell. This invention increases the Faraday efficiency from 20% to over 70% while maintaining the same yield as existing batch membrane electrode reactors for reducing nitrobenzene, significantly reducing stationary energy consumption and enabling rapid, efficient, continuous, and large-scale production of nitrobenzene and its derivatives.

This invention provides a novel method for manufacturing an aromatic amino compound, which is useful as a manufacturing intermediate for agricultural pharmaceuticals and electronic materials, and has at least one multiple bond selected from carbon-carbon, carbon-nitrogen, and carbon-oxygen in the portion outside the aromatic ring. A method for manufacturing an aromatic amino compound is characterized by catalytic reduction of an aromatic nitro compound having at least one multiple bond selected from carbon-carbon, carbon-nitrogen, and carbon-oxygen in the portion outside the aromatic ring using a Pt / C catalyst in the presence of at least one phosphorus compound (A) selected from the phosphorus compounds shown in formula (1), formula (2), and formula (3). P(R) 1 )3 (1), PO(R) 2 )3 (2), (R 3 )2P-R 4 -P(R) 3 )2 (3) The meanings of the symbols in the above formulas (1) to (3) are as defined in the instruction manual.

This invention discloses a method for synthesizing 2,4,5-trifluorophenylacetic acid, comprising reacting a compound of formula II with a nitro compound in a first reaction, followed by a second reaction with a borohydride to obtain a compound of formula III; the compound of formula III then undergoes a third reaction with a nitrite to synthesize 2,4,5-trifluorophenylacetic acid. This synthetic method uses readily available raw materials, is simple to operate, low in cost, and has a short route. It is also environmentally friendly, safe, and reliable, significantly improving the feasibility of industrial production.

This application relates to the field of lithium-ion battery solid electrolyte material preparation technology, and particularly to a LATP solid electrolyte material with high stability to lithium metal anode and its preparation method. The material includes an LATP matrix; an organic coating layer covering the surface of the LATP matrix, wherein the organic coating layer is a bonding layer formed by grafting an organic coating layer with oxidizing functional groups onto a coupling agent, the thickness of which is 3-50 nm, accounting for 0.3%-5% of the total mass of the LATP solid electrolyte material. The organic compounds with oxidizing functional groups are selected from nitro compounds, nitroso compounds, or N-oxides. These functional groups inhibit the reduction of titanium ions in LATP through reversible redox reactions, significantly improving the interfacial stability between LATP and the lithium metal anode. The material preparation method of this application is simple, low-cost, and can effectively extend the cycle life of lithium metal batteries.

This invention belongs to the field of fine chemical technology, specifically relating to a method for preparing aromatic amino compounds. The steps are as follows: adding an aromatic nitro compound, a reducing agent, a reducing aid, an alkali, and a solvent into a reactor, reacting at 80–110°C for 2–4 hours to obtain a reaction product; the reaction product is then post-treated to obtain an aromatic amino compound; wherein the reducing agent is pinacol diborate, and the reducing aid is β-cyclodextrin. The preparation method of this invention can not only reduce aromatic nitro compounds containing sensitive groups such as amino, hydroxyl, and ester groups to aromatic amino compounds, but also effectively protect the sensitive groups, obtaining aromatic amino compounds containing sensitive groups; it solves the technical problems of existing methods for reducing aromatic nitro compounds containing sensitive groups to aromatic amino compounds, where the sensitive groups are destroyed, there are many reaction byproducts, and the yield and purity of the reaction product are low.

The application discloses a continuous synthesis method of an amine compound, and preparation steps comprise the following steps: (1) a first catalyst is filled in a first reaction module, the first catalyst is activated under a nitrogen atmosphere and is heated; (2) reactants A are introduced into the first reaction module under the condition of having a solvent A1 or without a solvent, and reactants B are introduced into the first reaction module under the condition of having a solvent B1 or without a solvent, and a nitro compound intermediate C is obtained through condensation separation of a product; (3) a second catalyst is filled in a second reaction module, the second catalyst is activated under a nitrogen atmosphere and is heated; (4) the obtained nitro compound intermediate C is introduced into the second reaction module under the condition of having a solvent D or without a solvent, and a product is collected through condensation and gas-liquid separation, so that the amine compound is obtained. The reaction route is more green, the catalyst can be recycled, the defect that the amine compound cannot be continuously reacted at present is overcome, and sustainable production can be realized.

One of the objectives is to improve the accuracy of quantitative analysis of low-volatility substances, particularly in the simplified analysis of residues. Another objective is to improve the accuracy of quantitative analysis of nitro compounds using the chemiluminescence method. Furthermore, one of the objectives is to improve safety in the quantitative testing of low-volatility substances. [Solution] A low-volatility substance detector 1 for quantifying low-volatility substances using the chemiluminescence method, comprising a collection paper holder 2 for setting collection paper 9 opposite an exposed heating section 111, the collection paper holder 2 having a ventilation opening 22 in the portion facing the heating section 111.

This invention relates to the field of catalyst technology, and discloses a shaped catalyst and its preparation method, as well as a method for the catalytic hydrogenation of chloroaromatic nitro compounds. The preparation method includes: mixing a catalyst matrix, coal tar, and a first solvent, followed by shaping and calcination; the calcination temperature is not higher than 500°C; wherein the catalyst matrix comprises transition metal particles and a graphitized carbon layer shell coating the surface of the transition metal particles. The shaped carbon-coated metal catalyst prepared by this method can achieve a maximum conversion rate of 100% for chloroaromatic nitro compounds.

This invention relates to the field of biological culture media and their preparation methods, and particularly to a method for preparing macro-element culture solutions for plant culture media from purified nitro compound fertilizer extracts. The macro-element culture solution in this application uses nitro compound fertilizer produced by modern technology. Through purification processes, the stability and effectiveness of its main nutrient components and proportions are ensured. Nitro-ammonia-containing nitro compound fertilizer is used as a reagent raw material to prepare reagent-grade biological culture media. The raw materials used in biological culture media are widely available and inexpensive, the purification methods are simple and clear, and the application prospects are broad and the solution is safe and reliable. The macro-element culture solution can be used to prepare various reagent-grade culture media containing ammonium nitrate, and can be widely used in laboratory microbial culture, plant tissue culture propagation, and the cultivation of virus-free seedlings.

The application provides a preparation method of a bonded Lewis acid catalyst and application of the catalyst in preparation of aromatic nitro compounds from nitrated aromatic hydrocarbons. The catalyst is prepared by using sepiolite sequentially subjected to acid modification and silanization as a carrier, and bonding one or more active components, Lewis acids. The modification can improve the interaction between the carrier and the active acid component, and the stability of the catalyst is improved through the bonding mode of chemical bonds. The catalyst is applied to the nitration reaction of aromatic hydrocarbons. Meanwhile, the application is to use nitroxide compounds as a nitrating agent, and replace the traditional mixed acid system with the prepared modified sepiolite bonded with one or more Lewis acids as a catalyst. The method of the application belongs to green nitration, reduces the generation of waste acid and waste water, avoids the aggregation of mixed acid, and can be widely applied to the nitration reaction of various aromatic hydrocarbons.

This invention discloses a method for removing nitro compounds from water by pyrite-mediated atomic hydrogen reduction, comprising the following steps: (1) washing and drying natural pyrite, then grinding it into a gray-black powder catalyst using a ball mill; (2) placing the catalyst in an aqueous solution of nitroimidazole or nitrobenzene at room temperature and pressure, followed by the addition of sodium borohydride, and continuously bubbling the solution with an inert gas; (3) under low catalyst dosage (0.8 g / L) and sodium borohydride dosage (<0.16 g / L), metronidazole, ornidazole with an initial concentration of 20 ppm are completely removed within 1 min, and nitrobenzene with a removal rate of 0.6 mM reaches 98.98% within 20 min, with the main reduction products being the corresponding amino compounds. This invention uses natural pyrite as a catalyst to mediate the generation of atomic hydrogen, with a simple process and safe reagents, providing a practical strategy for reducing nitro compound pollution in the aquatic environment.

The application discloses a preparation method of a benzopyran derivative containing an amide structure, which comprises the following steps: reacting propargyl ether compound, hexafluoroisopropanol and N-iodosuccinimide at 60 DEG C for 1 h, then adding a nitro compound, palladium acetate, 2-diphenylphosphine-biphenyl, carbonyl molybdenum, potassium carbonate and water to react at 100 DEG C for 24 h, and after the reaction is completed, post-treatment is carried out to obtain the benzopyran derivative containing the amide structure. The preparation method uses the nitro compound as a reactant and a nitrogen source, and uses the carbonyl molybdenum as a carbonyl source, has mild reaction conditions, simple operation, a wide functional group tolerance range of a substrate and high reaction efficiency. According to actual needs, various benzopyran derivatives containing the amide structure can be synthesized, and the method is convenient to operate and wide in practicability.

The application discloses a bimetallic Pd-Zr / CN catalyst, a preparation method thereof and application of the bimetallic Pd-Zr / CN catalyst in a hydrogenation anti-sulfur system. The preparation method of the bimetallic Pd-Zr / CN catalyst comprises the following steps: 1) respectively preparing a Pd precursor aqueous solution and a Zr precursor solution; 2) preparing a CN carrier; 3) preparing Zr / CN; and 4) preparing the bimetallic Pd-Zr / CN catalyst. The application provides application of the bimetallic Pd-Zr / CN catalyst in a hydrogenation anti-sulfur system of unsaturated alkene compounds or aromatic nitro compounds, and the bimetallic Pd-Zr / CN catalyst exhibits good catalytic activity and stability.

The present invention addresses the problem of providing: an electrolyte solution that is for use in a vehicle-mounted hybrid-type electrolytic capacitor which is installed in vehicle-mounted AV equipment or electrical equipment, and that is capable of maintaining low ESR at high capacitance and in high frequencies in the long term, even in harsh high-temperature environments; and a vehicle-mounted hybrid-type electrolytic capacitor that is produced using the electrolyte solution.　Provided is an electrolyte solution for use in a vehicle-mounted hybrid-type electrolytic capacitor, wherein: the vehicle-mounted hybrid-type electrolytic capacitor has, inside an outer container, a capacitor element which has a solid electrolyte layer and the electrolyte solution which is impregnated in the capacitor element; the solid electrolyte layer contains a solid electrolyte comprising a conductive polymer; the electrolyte solution contains an electrolyte, an aromatic nitro compound, and an organic solvent; the electrolyte is an acid and / or a salt; the salt comprises an acid component and a base component; the aromatic nitro compound does not have, on an aromatic ring thereof, a hydroxyl group, a carboxyl group, or an alkyl group which has an hydroxyl group; and the electrical conductivity of the electrolyte solution at 30°C is 0.05-1.0 mS / cm.

This invention relates to a BsNTR mutant nitroreductase and its applications, belonging to the field of biotechnology. The BsNTR mutant is BsNTR-M, and its amino acid sequence is shown in SEQ ID NO.2. This invention designs and modifies wild-type BsNTR-WT from Bacillus subtilis. The resulting mutant BsNTR-M not only exhibits significantly improved thermostability (Tm value 14°C higher than wild-type BsNTR-WT) but also demonstrates 1.6 times enhanced enzyme catalytic activity. This effectively overcomes the technical bottlenecks of poor thermostability, weak environmental tolerance, and limited activity inherent in wild-type enzymes. Furthermore, it possesses excellent expression and purification performance, allowing for efficient expression and purification in prokaryotic expression systems while retaining high specificity for nitro compounds and good biocompatibility and environmental safety. Large-scale production can be achieved without complex equipment.