144 results about "Nitro compound" patented technology

The invention discloses application of a Ni-based reverse-phase catalyst in catalytic hydrogenation reaction of a nitro compound, nitro in the nitro compound is hydrogenated to reduce amino, the Ni-based reverse-phase catalyst is of an M / Ni reverse-phase structure, metal Ni for dissociating hydrogen serves as a carrier, nano metal M oxide is loaded on the carrier to serve as a loading phase, and reverse-phase interface active sites are constructed; wherein the metal M is one or two of Ce, Zr, Al, Y and Mg, and the mole fraction of the load phase metal M is 5-50% based on the mole fraction of all the metals in the catalyst being 100%. The preparation method of the catalyst is simple and easy to implement, the catalyst has a non-traditional supported reversed-phase structure, the activity of the catalyst is more excellent than that of a traditional supported catalyst when the catalyst is applied to the nitro-compound hydrogenation process, a traditional Raney nickel catalyst can be effectively replaced, a reaction system is clean and safe, repeatability is good, effective recycling can be achieved, and the catalyst is suitable for industrial production. The method is suitable for industrial production and has a good application prospect.

The invention discloses a method for reducing nitro compounds through an electrochemical microreactor. According to the method, nitrobenzene or a derivative thereof is subjected to electrochemical catalysis in a multi-channel series electrolytic tank in a constant-current electrolysis mode to be reduced to generate aniline or a corresponding aniline derivative. According to the method disclosed by the invention, the Faraday efficiency is improved from 40% to more than 80% under the condition that the yield of the nitrobenzene is kept unchanged compared with that of the existing electrochemical reduction nitrobenzene, so that the fixed energy consumption is greatly reduced, and rapid, efficient, continuous and large-scale production of the nitrobenzene and the derivatives thereof is realized.

The invention belongs to the technical field of optical drive catalytic materials, and discloses a preparation method of a foamed ceramic-metal organic framework composite catalytic material and application of the foamed ceramic-metal organic framework composite catalytic material in photo-thermal catalytic elimination of nitro compounds. According to the invention, photo-thermal catalytic MOFs are loaded on foamed ceramic, and a floatable integrated photocatalytic material is formed through in-situ self-assembly and is used for solar-driven nitro-compound thermal elimination. MOFs have high specific surface area, high porosity, good light absorption and high photo-thermal conversion efficiency; the foamed ceramic has the characteristics of strong adsorbability, good heat conduction, light weight, adjustable size and the like. The combination of the two overcomes the problems of difficult recovery, more residues and low efficiency of the traditional powder catalyst and the high cost, high energy consumption, high-temperature danger and the like of the traditional photo-thermal catalysis, and shows huge application potential. The method can be used for treating organic wastewater containing toxic nitro compounds (such as trinitrotoluene, dinitrobenzene, nitrochlorobenzene and the like), and a new thought is provided for wastewater treatment in the fields of explosives, medicines, pesticides, dyes and the like.

A method for reducing a substrate selected from 2-methyl-5-nitropyridine and methyl 4-(2-fluoro-3-nitrobenzyl)piperazine-1-carboxylate is provided catalysed by a nitroreductase and a disproportionation agent.

The invention discloses a catalytic system for preparing amine compounds through nitro reduction and application of the catalytic system. The catalytic system comprises an alkaline aqueous solution, a reducing agent and a catalyst, the alkaline aqueous solution is an alkali metal hydroxide aqueous solution; the reducing agent is alkali metal hydroboron and / or alkaline earth metal hydroboron; the catalyst is copper salt lewis acid and / or other lewis acid; the other Lewis acid is selected from one or a combination of more of cobalt salt, ferric salt, zinc salt, manganese salt and palladium salt. When the catalytic system is used for reducing the aromatic nitro-compound, the using amount of a reducing agent is small, meanwhile, the using amount of an organic solvent is reduced, the reaction yield is high, the reaction is milder, and amplified production of the process is facilitated.

The invention relates to the technical field of flash fire lifting agents, and discloses a flash fire lifting agent of an electrolyte of a boron-free aluminum electrolytic capacitor and a preparation method of the flash fire lifting agent, and the flash fire lifting agent comprises the following components in percentage by mass: 10-30% of organic ammonium carboxylate; 5%-15% of a nitro compound; 3%-10% of a phosphate ester compound; 2%-8% of a polyethylene glycol derivative; 0.5%-3% of organic siloxane; and the balance of deionized water. Through the synergistic effect of the organic ammonium carboxylate, the nitro compound, the phosphate ester substance and the organosiloxane in a specific proportion, the sparking voltage of the electrolyte is remarkably improved, and the negative effects of boron elements on the environment and the performance of a capacitor are avoided; a nitro compound is used as an electron acceptor to inhibit hydrogen precipitation, and cooperates with phosphate to fill oxide film micropores and block current concentration; the organic siloxane forms a hydrophobic barrier on an electrode interface, electrolyte decomposition is delayed, the organic carboxylic acid ammonium salt accurately controls the free acid concentration, and the conductivity rise caused by hydrogen ion migration is avoided.

The present invention aims to provide a vehicle composition for inorganic fine particle dispersion which has excellent decomposability at low temperature and enables degreasing in a short time, an inorganic fine particle-dispersed slurry composition containing the vehicle composition for inorganic fine particle dispersion, and a method for producing an inorganic fine particle-dispersed sheet with the inorganic fine particle-dispersed slurry composition. The present invention relates to a vehicle composition for inorganic fine particle dispersion, containing a binder resin, an organic solvent, and an organic compound having a boiling point at normal pressure of 200° C. or higher and lower than 400° C., the binder resin containing a (meth)acrylic resin, the organic compound containing at least one selected from a phenol compound, an aromatic amine compound, a quinone compound, and a nitro compound, the amount of the organic compound being 1 to 100 parts by weight relative to 100 parts by weight of the binder resin.

The invention discloses a method for removing nitro compounds in water by pyrite-mediated atomic hydrogen reduction. The method comprises the following steps: (1) washing and drying natural pyrite, and grinding by using a ball mill to obtain a grey black powder catalyst; (2) placing the catalyst in an aqueous solution of nitroimidazole or nitrobenzene at normal temperature and normal pressure, then adding sodium borohydride, and continuously bubbling the solution with inert gas; (3) adding a low catalyst (0.8 g / L) and using amount (lt) of sodium borohydride; according to the method, under the condition that the initial concentration is 0.16 g / L, metronidazole, ornidazole and tinidazole with the initial concentration being 20 ppm are thoroughly removed within 1 min, the removal rate of 0.6 mM nitrobenzene within 20 min reaches 98.98%, and a main reduction product is a corresponding amino compound. Natural pyrite is used as a catalyst to generate atomic hydrogen through mediation, the process is simple, reagents are safe, and a practical strategy is provided for reducing nitro compound pollution in the water environment.

The invention relates to the technical field of gas production materials, and discloses preparation and application of a high-nitrogen energetic gas production material, triazole has high-energy and multi-nitrogen characteristics, nitryl compounds have high energy, and the combination of triazole and nitryl compounds enables the gas production material to have the characteristics of large gas production rate, low-temperature combustion, less harmful gas and the like; the molecular structure contains a large number of N-N, C-N and C = N bonds and has high enthalpy of formation, meanwhile, the content of C and H in the molecule is low, the density of the energetic material can be improved, the electronegativity of nitrogen and oxygen atoms in the structure is high, and the energetic material is a painful energetic material and has high safety in the using process; compared with similar gas production materials, the prepared gas production material has the advantages that the gas production rate is greatly increased, the amount of solid residues is greatly reduced, the added adhesive has no corrosivity, the prepared gas production material is good in fluidity, the external additive can play a role in slagging, and the residues are not prone to being sprayed out.

The application discloses a diamine containing a DDSQ base element and a preparation method thereof, and belongs to the technical field of gas separation and purification. The preparation method of the diamine containing the DDSQ base element is suitable for synthesizing DSDQ functional molecules with different molecular structures and reaction activities, and meets the polymerization requirements. The preparation method of the polyimide gas separation membrane is as follows: firstly, a nitro aryl amine functional molecule is synthesized; then, the nitro aryl amine functional molecule is reacted with a DSDQ binary anhydride synthesized by using a disclosed technical solution to obtain a double-nitro compound containing the DSDQ; finally, the double-nitro compound is hydrogenated and reduced to obtain a target molecule, namely, a DSDQ diamine. The DSDQ diamine is condensed with a binary anhydride to obtain a polyamide acid precursor, and the polyamide acid precursor is cyclized and dehydrated to obtain a polyimide. Finally, the polyimide gas separation membrane containing the DSDQ base element is obtained by using a dissolving-tape casting method. The separation membrane still has stable gas permeability and relatively constant selectivity after physical aging for 300 days at room temperature, and has outstanding anti-aging performance.

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 application of a nitro compound in preparation of products prolonging life, and the nitro compound has the structure shown in the following general formula (I). The application takes Caenorhabditis elegans as an object, and studies influence of TBN on life and health indexes of the Caenorhabditis elegans. Experimental results show that the TBN prolongs the life of the Caenorhabditis elegans, significantly improves pharyngeal pumping rate and movement ability of the Caenorhabditis elegans, and significantly reduces lipofuscin accumulation degree of the Caenorhabditis elegans.

The invention provides a production method and production equipment of an aromatic nitro compound, and the production method comprises the following steps: carrying out nitration reaction on fuming nitric acid, a sulfuric acid-nitric acid mixed solution and aromatic hydrocarbon to obtain a nitration product crude product and waste acid; performing first-stage pickling on the nitration product crude product by using first pickling water to obtain a first-stage pickled crude product and first-stage yellow water; performing second-stage pickling on the first-stage pickling crude product by adopting second pickling water to obtain a second-stage pickling crude product and second-stage yellow water; mixing the first-grade yellow water with a nitric acid replenishing solution to obtain a sulfuric acid-nitric acid mixed solution, and returning the sulfuric acid-nitric acid mixed solution to the nitration reaction as a raw material; the second pickling water is concentrated wastewater generated by concentrating a byproduct dilute sulfuric acid in the preparation process of fuming nitric acid to form concentrated sulfuric acid; the first pickling water is a mixed solution formed by mixing secondary yellow water and sulfuric acid. The production method is good in operation stability, simple in technological process and low in cost.

The application relates to the technical field of nitro compound fertilizers, and discloses a nitro compound fertilizer solution granulation device, which comprises a mixing frame, a feeding frame in communication with the top of the mixing frame, a granulator in communication with the bottom of the mixing frame, a supporting frame fixedly connected to the surface of the mixing frame, a protection frame fixedly connected to the inner wall top of the mixing frame, a motor fixedly connected to the inner wall of the protection frame, a rotating rod fixedly connected to the output end of the motor, a mixing component arranged on the surface of the rotating rod, and a pushing component arranged at the end, away from the rotating rod, of the mixing component. After the nitro compound fertilizer raw materials enter the inside of the mixing frame through the feeding frame, the motor is powered on, the motor drives the mixing component to rotate in the inside of the mixing frame through the rotating rod, the mixing component mixes and stirs the nitro compound fertilizer raw materials when rotating, and the pushing component is arranged on the surface of the mixing component and mixes the nitro compound fertilizer raw materials.

The invention belongs to the field of fertilizer production, and particularly relates to a nitro-compound fertilizer and urea-based compound fertilizer production interchange method which comprises the following steps: early-stage configuration of a production system: arranging a urea-based secondary tank and a nitro secondary tank which are mutually independent and separately arranged, according to the invention, seamless interchange production of the nitro-compound fertilizer and the urea-based compound fertilizer on the same production line is realized by constructing a synergistic system of material distribution system-independent equipment-clean cleaning-parameter regulation and control. In the conversion process, the new formula production can be quickly linked only by completing the complete cleaning of the production line and the switching operation of the overflow pipeline of the first-stage tank, so that the tedious steps of the traditional conversion process are greatly simplified. According to the method, the conversion time is remarkably shortened, the comprehensive utilization rate of a production line is improved, and the problem that the conversion efficiency of a traditional process is low is solved through the standardized processes of order completion, thorough cleaning, overflow pipe switching and urea production starting during nitro-to-urea-based conversion and corresponding coherent operation of urea-to-nitro-based conversion.

The invention belongs to the technical field of organic synthesis, and particularly relates to a continuous production method for hydrogenation ammoniation of a nitro compound. The method comprises the following steps: putting a 3-nitro-N-ethyl carbazole solution into a raw material tank of a fixed bed, filling a reactor of the fixed bed with a non-noble metal hydrogenation catalyst, carrying out hydrogenation reaction by taking H2 with the flow rate of 100-300ml / min as carrier gas at the air speed of 0.01-0.1 h <-1 >, continuously introducing H2 in the reaction process, keeping the pressure in the system at 1.0-2.5 Mpa and the reaction temperature at 120-140 DEG C, and carrying out solid-liquid separation to obtain the 3-nitro-N-ethyl carbazole. And the 3-amino-N-ethyl carbazole is prepared. Through a fixed bed continuous hydrogenation mode, the H2 content in the reaction process is controllable, the generation amount of byproducts can be strictly controlled, and the product yield is close to 100%; and the fixed bed is adopted for continuous hydrogenation reaction, so that the safety index of field operators is greatly improved.

The invention discloses an anti-yellowing agent as well as a preparation method and application thereof, the anti-yellowing agent is prepared by compounding the following raw materials: aryl sulfonic acid and alkanolamide in a molar ratio of 1: (0.9-1.0), the aryl sulfonic acid is cardanol sulfonic acid, the alkanolamide is alkanolamide in a molar ratio of 1: (0.9-1.0), and the alkanolamide is alkanolamide in a molar ratio of 1: (0.9-1.0). The anacardol sulfonic acid in the anti-yellowing agent and the hindered phenol antioxidant generate intermolecular association, so that the activity of a yellow nitro compound formed by the hindered phenol antioxidant and nitrogen oxide is reduced, the effect of preventing yellowing is achieved, and stable color and performance can be kept; the cardanol sulfonic acid not only provides water solubility of sulfonic acid groups, but also has resin compatibility of long-chain alkyl groups, and is completely suitable for a water-borne epoxy resin coating system.

The invention discloses a continuous thermal extraction method of a catalyst in a chloride compound, and relates to the technical field of catalyst extraction. A double-packed-tower series continuous extraction system is adopted, 90-DEG C hot water is used as an extraction agent, gradient separation of a catalyst is achieved through a pulse enhanced mass transfer technology, and the double-packed-tower series continuous extraction system comprises a control system, a first-stage extraction tower and a second-stage extraction tower, the control system adopts a DCS (Distributed Control System) to automatically adjust the temperature and flow of the first-stage extraction tower and the second-stage extraction tower, and the first-stage extraction tower and the second-stage extraction tower are connected through a spiral plate type heat exchanger; by means of the double-packed tower series connection and pulse enhanced mass transfer technology, interphase contact is enhanced, the mass transfer effect is improved, repeated extraction operation is not needed, the treatment period is shortened, and extraction agent consumption is reduced; by adopting an accurate temperature control and gradient extraction mode, nitro compound decomposition caused by temperature fluctuation is avoided, generation of by-products is reduced, and the separation and purification difficulty of a subsequent working section is reduced.

The application discloses a kind of ion imprinting self-assembly high tower nitro compound fertilizer and preparation method thereof, it is related to fertilizer technical field, nitro compound fertilizer raw material is made into matrix granule;Template metal salt, functional monomer containing olefin bond, solid crosslinking agent, hydrophobic modifier and thermal initiator are uniformly mixed, and self-assembly coating powder is made;Make self-assembly coating powder adhere to the surface of matrix granule;After coating, matrix granule is transferred into drum, and under the condition of 40 DEG C~60 DEG C, 60%RH~90%RH, 5r / min~15r / min, it is ripened 4h~12h, and ripened granule is obtained;Ripened granule is screened, and is dried, and ion imprinting self-assembly high tower nitro compound fertilizer is obtained.The application is by self-assembly coating powder adhering to the surface of matrix granule, ion imprinting crosslinked polymer layer and surface hydrophobic layer are formed by wet heat ripening, metal ion slow-release function can be realized and anti-caking performance is endowed to granule.

The invention relates to the technical field of catalytic hydrogenation, in particular to a catalyst and application thereof in preparation of procaine through hydrogenation, a high-molecular compound is introduced to the surface of a zirconium oxide carrier for pretreatment, a high-density oxygen defect structure is formed through roasting induction, and the interaction between active metal platinum and a carrier ZrO2 is remarkably enhanced; according to the preparation method, double assistant metals are adopted for synergistic modification, so that breakage of side reaction ester bonds can be effectively inhibited, the reaction selectivity and the target product yield are improved, alcohol byproducts and hydroxylamine byproducts are reduced, sharing of sodium hyaluronate and assistant metals is introduced, uniform distribution of the assistant metals on the surface of a carrier is promoted, and the agglomeration phenomenon is avoided; meanwhile, high dispersity and stability of the metal particles are guaranteed, so that the catalyst is endowed with excellent catalytic activity, selectivity and regeneration performance, the regenerated and activated catalyst still can keep good performance, and the catalyst is particularly suitable for hydrogenation of nitro compounds with ester groups.

A method for controllable stepwise reduction of electrocatalytic unsaturated nitro compounds with potential regulation belongs to the field of organic electrocatalysis. In a three-electrode system, an electro-reduced copper nanowire catalyst (ER-Cu / CF) grown on copper foam is used as the cathode, a platinum sheet is used as the counter electrode, and an Ag / AgCl electrode is used as the reference electrode. The two poles of the electrolytic cell are separated by a nafion membrane to form an electrocatalytic reactor. In a neutral electrolyte containing nitro compounds, by adjusting the low direct current voltage, the electrocatalytic unsaturated nitro compounds are controllably stepwise reduced to obtain hydroxylamine intermediates, amino products, and fully reduced products with high selectivity and high yield. In the present invention, the selectivity and yield of the products are very high, it can be carried out at normal temperature and pressure, the operation is simple, green and safe, and the reaction controllability is high; it avoids problems such as low yield, poor selectivity, use of noble metal catalysts and toxic reagents, environmental pollution, and the need for high reaction temperature and pressure in other methods.

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 invention discloses an o-nitrophenol production wastewater treatment process aiming at environmental protection, and particularly relates to the technical field of industrial wastewater treatment and resource recycling, the o-nitrophenol production wastewater treatment process comprises the following steps: S1, pretreating wastewater and selectively extracting and recycling o-nitrophenol, S2, carrying out catalytic hydrogenation reduction on the pretreated wastewater to convert a nitro compound into an amino compound, and S3, carrying out catalytic hydrogenation reduction on the amino compound to obtain the o-nitrophenol production wastewater. The method comprises the following steps: S1, carrying out a hydrolysis reaction, S3, carrying out a directional hydrolysis reaction, and converting an amino compound into a recoverable chemical or an easily degradable intermediate, S4, carrying out deep biochemical and catalytic ozonation treatment on the hydrolyzed effluent, and S5, carrying out reverse osmosis treatment to realize the reuse of the produced water. According to the method, core pollutants are directionally converted into high-value resources, efficient purification, resource recovery and near-zero emission of wastewater are achieved, meanwhile, waste gas and waste residues are cooperatively treated, and the method has outstanding environmental and economic benefits.

The invention relates to a nitro continuous fixed bed hydrogenation production process under a platinum-based catalyst, and belongs to the technical field of fine chemical engineering. Placing the carrier in rolling equipment, and spraying a chloroplatinic acid solution; calcining in an air atmosphere, and reducing in a hydrogen atmosphere to obtain a catalyst carrier; dispersing the catalyst carrier in toluene, adding 2-mercaptobenzimidazole and aminoferrocene, and stirring for reaction to obtain a platinum-based catalyst; loading the prepared platinum-based catalyst into a fixed bed reactor with a gas-liquid mixing structure; dissolving nitrobenzene in a solvent to obtain a reaction solution; adding the reaction liquid and hydrogen into a fixed bed reactor through a mixer by virtue of a pump, and carrying out hydrogenation reaction with a platinum-based catalyst; after the reaction is finished, a reaction product is separated and purified to obtain aniline; when the prepared catalyst is used for continuous liquid phase hydrogenation reduction of nitro compounds in a fixed bed, generation of by-products can be effectively reduced, high-purity amino compounds are obtained, and extremely high catalytic efficiency is kept for a long time.

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 present invention relates to a process for the preparation of an aromatic amine by hydrogenation of an aromatic nitro compound, comprising the following steps: (I) providing a copper tetramine salt-based impregnation catalyst, in particular an impregnation catalyst obtainable by the incipient wetness method, comprising a metal or metal oxide on a support as a hydrogenation catalyst. At least metallic or oxidic copper (in particular CuO) is present and the mole fraction of Cu based on all metals present is in the range of 075 to 1, and wherein the support comprises shaped silicon-dioxide shaped bodies or silicon-carbide shaped bodies; (II) optionally, activating the hydrogenation catalyst by treating with hydrogen in the absence of the aromatic nitro compound; and (III) reacting the aromatic nitro compound with hydrogen in the presence of the, optionally activated, hydrogenation catalyst to obtain the aromatic amine.

The application belongs to the technical field of rare earth fluorescent probes, and particularly relates to application of a choline type rare earth fluorescent probe in detection of nitro compounds in ionic liquids and nitro compounds in water. The application synthesizes a choline type rare earth fluorescent probe [choline]3[Eu(dpa)3] (wherein choline is choline, and DPA is 2,6-pyridine dicarboxylic acid) which has good solubility and stability in ionic liquids and aqueous solutions. The synthesized choline type rare earth fluorescent probe is used as a rare earth fluorescent probe for detecting nitro compounds, and the fluorescence detection performance of the choline type rare earth fluorescent probe on various nitro compounds in water and 1-butyl-3-methyl imidazole hexafluorophosphate (BmimPF6) ionic liquids is explored. The application fills a blank of substance detection of rare earth fluorescent probes in ionic liquid solvents, and has important application value for realizing detection of nitro compounds in ionic liquids.