2055results about "Amino compound preparation" patented technology

The invention relates to a preparation method of phenylmethylamine. The technical scheme adopted by the invention for mainly solving the problems of high catalyst loss, low production efficiency and high intermittent operation labor intensity is as follows: the preparation method of the phenylmethylamine comprises the following steps: mixing the raw material of cyanobenzene with a solvent material or at least one of one part of product materials in a mixing unit, introducing the mixture into a fixed bed hydrogenation reactor to be in contact with hydrogen and a catalyst and carry out multi-phase continuous hydrogenation reaction to obtain a product material containing phenylmethylamine, separating the product material to obtain a phenylmethylamine product, wherein the catalyst is a metal loaded catalyst; and the metal is selected from at least one of Pd, Pt, Cu, Ni, Mo and Fe. The preparation method can be used for preparing phenylmethylamine.

The invention relates to the technical field of chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that m-dinitrobenzene is dissolved with alcohol, and selective hydrogenation is conducted in a high-temperature and high-pressure reaction kettle with a palladium catalyst; and co-heating and refluxing the product after selective hydrogenation, a strong alkali aqueous solution, a first solvent and a phase transfer catalyst to obtain the m-aminophenol salt. M-aminophenol salt, p-nitroiodobenzene, alkali and a second solvent are subjected to a co-heating reaction, and then 3-amino-4 '-nitrodiphenyl ether is obtained through post-treatment; the method comprises the following steps: dissolving 3-amino-4 '-nitrodiphenyl ether with alcohol, carrying out hydrogenation reduction with a palladium catalyst, and carrying out post-treatment purification to obtain 3, 4'-diaminodiphenyl ether. According to the method, common m-dinitrobenzene is used as a raw material, m-nitroaniline is obtained through selective hydrogenation, m-aminophenol salt is prepared through the m-nitroaniline, then etherification reaction is carried out, the reaction yield is higher, the purity is better, and side reactions are few.

The invention relates to the technical field of scintillator materials and X-ray detection, in particular to a rare earth organic-inorganic hybrid complex scintillator and a preparation method and application thereof. The general formula of the rare earth organic-inorganic hybrid complex scintillator is [RE (L) 4] <->. [A] < + >, wherein RE is selected from Eu, Tb, Sm or Dy; l is a beta-diketone ligand; [A] < + > is selected from long-chain hydrophobic quaternary ammonium salt cations or heterocyclic quaternary ammonium cations which have the carbon atom number of C8-C20 and do not contain active functional groups. The rare earth organic-inorganic hybrid complex scintillator provided by the invention has good solubility and molecular-level dispersion capability. The scintillator film based on the rare earth organic-inorganic hybrid complex prepared by using the rare earth organic-inorganic hybrid complex has the characteristic of compatibility of high scintillator load and high light transmission, overcomes the problems of low scintillator load rate, poor transparency and limited imaging resolution of the traditional scintillator film, and has excellent practical value and popularization prospect.

The invention provides a preparation method and application of a cobalt-based catalyst, and relates to the technical field of chemical production. The cobalt-based catalyst includes cobalt, a transition metal element, and a Group IIIA element other than aluminum. Transition metal elements and IIIA group elements except aluminum are introduced into the cobalt-based catalyst, and the electronic structure and active sites of the cobalt-based catalyst are changed. The method not only can cooperate with catalytic reaction and promote the formation and conversion of intermediates, but also can enhance the adsorption and activation capability on substrates, reduce the reaction activation energy and guide the reaction to be carried out along a specific path. Finally, the effect of efficiently harvesting the 2-methyl pentamethylene diamine and the 3-methylpiperidine at the same time is achieved.

The invention belongs to the field of catalyst preparation and compound synthesis, and particularly relates to a composite metal catalyst, a preparation method and application of the composite metal catalyst in co-production of diethylenetriamine and piperazine. The composite metal catalyst consists of three parts, namely a main active component, an auxiliary active component and a carrier, the main active component is at least any one of Ni and Cu, the auxiliary active component is at least any one of Mg, Cr, Mn, Co, Sr, La and Ba, and the carrier is Al2O3. The invention also provides a method for co-production of piperazine from diethylenetriamine by using the composite metal catalyst. By adopting the method disclosed by the invention, the coproduction of the piperazine with high added value in the continuous synthesis process of the diethylenetriamine can be realized.

The invention discloses an acetonitrile hydrogenation catalyst and a preparation method and application thereof. The acetonitrile hydrogenation catalyst is a transition metal modified Pt supported catalyst. A transition metal precursor adopted in the transition metal improvement is an oxide containing transition metal elements; the transition metal element is selected from at least one of titanium, vanadium, manganese, iron, cobalt, nickel and copper; the acetonitrile hydrogenation catalyst also comprises a carrier; the carrier is selected from at least one of gamma-Al2O3, SiO2, an MOR molecular sieve and a ZSM-5 molecular sieve. The catalyst can effectively catalyze acetonitrile hydrogenation to prepare ethylamine under mild reaction conditions. The supported catalyst provided by the invention has excellent reaction performance such as high acetonitrile conversion rate in acetonitrile hydrogenation reaction, the reaction condition is mild, the operation is simple, and the catalyst is easy to prepare and can be recycled.

The invention discloses a method for continuously producing fluorobenzene, which comprises the following steps: S10) mixing anhydrous hydrogen fluoride and aniline in a tubular reactor to obtain an aniline hydrofluoride mixture; s20) introducing the aniline hydrofluoride mixture into a venturi tube reactor in an inert gas atmosphere, sucking powdered and dried sodium nitrite into the venturi tube reactor in a negative pressure environment formed by the venturi tube reactor, and carrying out a synthetic reaction to obtain a diazonium solution; s30) transferring the diazonium solution into a tubular reactor for pyrolytic reaction to obtain a crude fluorobenzene solution; s40) refining the crude fluorobenzene raw material to obtain fluorobenzene; according to the method disclosed by the invention, the crossing from an intermittent artificial kettle reaction to a continuous reaction is realized, the reaction is sufficient and complete, no 70% hydrofluoric acid mother liquor, no 70% sulfuric acid waste liquor, no high-concentration wastewater and no yellow mud solid waste are produced, a high-quality fluorobenzene product can be continuously prepared in a large batch, and the method has good economic and environmental benefits and a wide market application prospect.

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 relates to a preparation method of H12MDA with low trans-trans isomer content and a catalyst used in the preparation method. The catalyst is a supported catalyst and comprises a silicon-aluminum amorphous carrier and an active component, the silicon-aluminum amorphous carrier has a micropore, mesopore and macropore structure and is prepared by carrying out hydrothermal reaction on raw materials comprising an aluminum source and a silicon source in the presence of a template agent, and the template agent is selected from 4, 4-diaminodiphenyl-methane and 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane or 2, 4-diaminodiphenyl-methane. The catalyst is one or a combination of two of 1, 4-diaminodiphenylmethane. The catalyst is long in service life and excellent in stability, the yield of an H12MDA target product can be increased, the content of trans-isomers in the product is reduced, and the preparation process is also simple. The invention also provides a method for preparing H12MDA through MDA catalytic hydrogenation, and the method can improve the yield of the H12MDA product and obviously reduce the content of trans-isomers in the product.

The invention relates to the field of medicines. Specifically, the invention relates to a voltage-gated calcium channel alpha2delta subunit ligand containing a polycyclic gamma-aminobutyric acid structure as shown in a general formula I, a preparation method of the voltage-gated calcium channel alpha2delta subunit ligand and application of the voltage-gated calcium channel alpha2delta subunit ligand to treatment of chronic neuropathic pain, epilepsy and anxiety. # imgabs0 #

The invention provides a catalyst, a preparation method and application thereof, and a method for preparing primary amine by catalyzing nitrile compound hydrogenation, and particularly relates to the technical field of catalyst synthesis. The catalyst comprises a nickel / cobalt-based catalyst and a metal salt; wherein the nickel / cobalt-based catalyst is selected from any one of a supported nickel / cobalt-based catalyst, a Raney nickel / cobalt catalyst or a nickel / cobalt nanocrystal; the metal salt comprises any one or a combination of at least two of tungsten salt, molybdenum salt, vanadium salt, aluminum salt and cerium salt. The metal salt and the nickel / cobalt main catalyst have a synergistic effect: the surface electron density is adjusted through electron transfer, the hydrogen dissociation and cyano adsorption activation capacities are enhanced, the hydrogenation activity is improved, and the mild condition reaction is assisted; the surface chemical environment is changed or steric hindrance is borrowed, the primary amine selectivity is improved, and byproducts are inhibited; aluminum salt, cerium salt and the like inhibit nickel / cobalt agglomeration, increase active sites, enhance stability, prolong the service life and reduce the dosage.

The invention provides a preparation method of a nitrogen-doped non-noble metal catalyst. The preparation method comprises the following steps: mixing ethylenediaminetetraacetic acid, triethylamine, a nickel source and a cobalt source in a DMF (Dimethyl Formamide) solution, and aging; and centrifuging, drying and calcining at high temperature to obtain the nitrogen-doped non-noble metal catalyst with the average particle size of 10-50nm. According to the preparation method of the nitrogen-doped non-noble metal catalyst provided by the invention, the prepared nitrogen-doped non-noble metal catalyst has the following beneficial effects that the complex metal ions are adopted as the precursor, the nitrogen-doped non-noble metal nanoparticles are prepared by a high-temperature calcination method, and the catalyst obtained by the method has the characteristics of high dispersity, high catalytic activity and high catalytic activity. The preparation method is simple and good in repeatability; and the synthesis steps are simple, and the cost is low. The nitrogen element is introduced, so that the deamination reaction can be effectively inhibited, and the yield of m-phenylenediamine is improved. When the prepared catalyst is applied to an isophthalonitrile hydrogenation process, extremely high yield of m-phenylenediamine can be maintained under mild reaction conditions.

The invention relates to the field of catalysts, in particular to a preparation method of a green and efficient copper catalyst. Comprising the following steps: (1) mixing basic cupric carbonate, ammonia water and water, adding ammonium salt at the same time, and preparing a copper ammonia solution as a precursor solution at room temperature; (2) mixing the precursor solution with a carrier or a carrier precursor to realize active component loading and catalyst preparation; and (3) filtering, washing, drying and roasting the mixed system in the step (2) to prepare the copper-based catalyst. According to the preparation method of the copper ammonia complexing precursor solution, preparation of the copper ammonia complexing solution at room temperature can be achieved, heating operation in the precursor preparation process is avoided, meanwhile, the nitrogen content of the system and nitrogen emission in the subsequent roasting process can be reduced by preparing the copper-based catalyst through the basic copper carbonate precursor, and efficient and green preparation of the catalyst is achieved.

The invention provides an organic-inorganic perovskite light absorption layer, a perovskite solar cell and respective preparation methods, the light absorption layer adopts three-source co-evaporation to form an inorganic material layer, then the inorganic material layer is coated with an organic ammonium salt, cesium halide and lead chloride are introduced in the preparation method, a large-framework CsPb2X5 (X = Cl / Br / I) quasi-two-dimensional layered structure is formed in the inorganic layer, and the perovskite solar cell is prepared. The distance between crystal surfaces in the inorganic framework is enlarged, and permeation of an organic ammonium salt solution is promoted. The content of the lead chloride is controlled by regulating the deposition rate of the lead chloride so as to form gradient distribution, so that energy level alignment of the light absorption layer and the hole transport layer is realized, and the efficiency of the perovskite solar cell is improved.

The invention relates to a compound and an organic light-emitting device, in particular to a novel organic light-emitting material, and synergistic improvement of various excellent properties is achieved through careful design of a molecular structure. Because deuteration is carried out on active sites of respective structures, the compounds have good thermal stability, chemical stability and photoelectric stability. Meanwhile, the compound has good carrier mobility, an exciton recombination region is further widened, the service life of a device is prolonged, and the efficiency of the device is improved. And # imgabs0 #.

The invention relates to a migration-resistant anti-aging agent as well as a preparation method and application thereof, the method comprises the following steps: taking a substance as shown in a formula I and nitric acid as reactants, condensing H in an amino para-position group-CH-H and nitryl to obtain a nitrated substance, and carrying out hydrogenation reduction on the nitryl of the nitrated substance under the action of a catalyst to obtain an intermediate product. And carrying out hydrogenation on the intermediate product and ketone under the action of a catalyst to obtain a final product, namely the migration-resistant anti-aging agent II. The raw materials are convenient to purchase and transport, the product yield is high, the cost is low, the operation is simple, and the environmental pollution is small, so that the method has an industrial development prospect. # imgabs0 #

The invention relates to the technical field of quantum information devices, and particularly discloses a fullerene Y3N-C80-based probability bit device and a preparation method thereof.The probability bit device comprises fullerene Y3N-C80 molecules, graphene point electrodes, a metal electrode and a substrate, the fullerene Y3N-C80 molecules are connected to the two graphene point electrodes, the graphene point electrodes are connected to the metal electrode, and the metal electrode is connected to the substrate. The graphene point electrode and the metal electrode are located on the substrate, and the fullerene Y3NatC80 molecules are connected with the graphene point electrode through amide covalent bonds. According to the invention, the electric dipole moment is driven to overturn under the condition that different transverse source-drain bias voltages are applied to the probability bit device, so that the probability bit device can present different conductive states, the time proportion of the conductive states can be adjusted according to the magnitude of the applied transverse source-drain bias voltages, and the purpose of regulating and controlling the single-molecule probability bit device is achieved.

The invention belongs to the technical field of photovoltaic solar materials, and particularly relates to a high-conversion-efficiency perovskite precursor material and a preparation method thereof. The high-conversion-efficiency perovskite precursor material is composed of phenyl ammonium cesium composite cations, metal halide, an additive, a nuclear auxiliary agent and a solvent. By compounding phenylethyl ammonium iodide and cesium iodide, phenylammonium and cesium cations are introduced into perovskite crystal lattices, organic-inorganic balance of the material is optimized, phenylammonium promotes formation of a quasi-two-dimensional structure, and damp-heat stability is enhanced; cesium ions fill A-site gaps, so that crystal lattices are tighter, and the thermal stability and the photoelectric conversion efficiency are improved; the synergistic matching addition of the metal halide realizes band gap regulation and control and spectrum matching, and quaternary ammonium salt adjusts nucleation and grain growth, so that a uniform film structure is ensured, and defects are reduced; and guanidine salt passivates defects after crystal growth, stabilizes crystal lattices, and improves charge life and device efficiency.

The invention relates to the technical field of preparation of organic compounds, in particular to 2-chlorophenylhydrazine hydrochloride and a preparation process thereof. The 2-chlorophenylhydrazine hydrochloride is prepared from 500-600 parts of ethyl alcohol, 500-600 parts of stannous chloride solution, 300-350 parts of hydrochloric acid solution, 100-120 parts of 2, 4-dichloronitrobenzene and 10-12 parts of reduced iron powder. According to the preparation method, 2, 4-dichloroaniline hydrochloride is firstly prepared by adopting 2, 4-dichloronitrobenzene as an initial raw material, and due to the relatively stable structure, the chemical property of an intermediate product can be better kept unchanged in the storage, transportation and subsequent reaction waiting links in the whole preparation process; due to the stability, unnecessary chemical reaction or degradation caused by external environment factors can be effectively avoided, so that the subsequent 2-chloroaniline hydrochloride extraction step can be carried out on the basis of a stable starting material, and the stability basis of final product extraction is improved.

The invention discloses a low-water-solubility medicine crystal as well as a preparation method and application thereof. The compound Z pamoate crystal form I has large characteristic diffraction peaks at one or more positions with diffraction angles 2 theta of 9.9 + / -0.2 degrees, 10.7 + / -0.2 degrees, 12.1 + / -0.2 degrees, 14.9 + / -0.2 degrees, 17.3 + / -0.2 degrees, 19.4 + / -0.2 degrees, 20.7 + / -0.2 degrees and 23.1 + / -0.2 degrees. Compared with an amorphous compound Z pamoate, the crystal provided by the invention has the advantages of good stability, no crystal transformation phenomenon, no obvious increase of related substances and low solubility; the production process is simple, only water is used as a solvent in the whole process, and no organic solvent is used; when the long-acting slow-release anti-Parkinson medicine composition is prepared from the compound Z pamoate crystal form I, the medicine encapsulation efficiency is high, the burst release is low, the composition continuously releases the medicine in vivo for more than 2 weeks, the administration frequency of a patient can be reduced, and the medication compliance is improved.

The invention belongs to the technical field of catalyst preparation, and provides an M2 diatomic site catalyst for a reaction for preparing phenylenediamine through dinitrobenzene hydrogenation and a preparation method and application thereof.The catalyst is formed by anchoring transition metal M diatomic sites to the surface of a diamond-graphene carrier and is prepared by taking nano-diamond powder as a raw material through a one-step reaction. Annealing treatment is carried out at the high temperature of 750-850 DEG C, a diamond-graphene carrier of an sp3 atsp2 core-shell structure is constructed, and the surface defect density of the diamond-graphene carrier is regulated and controlled in the process; and depositing metal species on the surface of the carrier through ALD double-step deposition to obtain the M2 diatomic site catalyst with high density and stable structure. The M2 diatomic site catalyst is applied to a reaction for preparing a corresponding phenylenediamine compound through hydrogenation of a dinitrobenzene compound, and high conversion rate and high selectivity can be achieved with low metal loading capacity under mild conditions. The method can be popularized to construction of diatomic catalysts of various transition metals, and has a wide application prospect.

The invention discloses a method for preparing ethylenediamine and piperazine from ethylene glycol, which comprises the following steps: in a system containing ethylene glycol, ammonia gas, hydrogen, a solvent and a catalyst, carrying out dehydrogenation, amination and hydrogenation on ethylene glycol and ammonia gas under the action of the catalyst to generate ethanolamine; the ethanolamine is further aminated to generate ethidene diamine; and further reacting ethylene glycol, ethanolamine and ethylenediamine to generate piperazine. According to the present invention, the solubility of ethanolamine and ethylenediamine is increased by introducing the solvent with the high polarity into the reaction system, such that the high ethylene glycol conversion rate is achieved under the mild reaction conditions (180-220 DEG C, 4-5 MPa), and the selectivity of ethylenediamine and piperazine is significantly improved. Wherein the selectivity of ethylene glycol can reach 74.1%, the sum of the selectivity of ethanediamine and piperazine can reach 85.5%, and the selectivity of piperazine can reach 73.3%.

The invention provides a preparation method of cyclohexylamine and dicyclohexylamine and a control method of dicyclohexylamine yield in cyclohexylamine and dicyclohexylamine co-production reaction, the method comprises the following steps: aniline and hydrogen are subjected to hydrogenation reaction in the presence of a catalyst to prepare cyclohexylamine and dicyclohexylamine, the raw materials also contain water, the water content is 0.1 wt%-3.0 wt% of the mass of aniline, and the water content is 0.1 wt%-3.0 wt% of the mass of hydrogen. The yield of cyclohexylamine and dicyclohexylamine is adjusted by adjusting the water content, and the flexibility and market competitiveness of a production device are improved.

A process for the hydrogenation of carbonyl compounds consisting of the following steps: (a) providing hydrogen with a molar share of deuterium ≤ 100 ppm, based on the total hydrogen content, by electrolysis of water using electrical power generated at least in part from non-fossil energy, (b) hydrogenating a carbonyl compound using the hydrogen provided in step (a) to form the corresponding hydrogenation product, wherein at least one carbonyl group of the carbonyl compound is hydrogenated.

The present invention generally relates to a field of material science and chemistry. Specifically, the present invention relates to synthesis and characterization of lead-free hybrid organic-inorganic Perovskite compounds for metal ion sensing applications. More particularly, the present invention relates to lead-free low dimensional manganese (Mn)- and copper (Cu)- based hybrid organic-inorganic perovskites (HOIPs) for visual fluorometric Pb2+ ion detection. Further, the present invention relates to synthesis of lead-free low dimensional manganese (Mn)- and copper (Cu)-based hybrid organic-inorganic perovskites (HOIPs) via mechanochemical synthesis methodology.

The invention discloses an inorganic carbon supported iron-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out surface treatment on a carbon carrier to form an oxygen-containing functional group, introducing the oxygen-containing functional group into a mixed solution containing an iron-based metal salt and an inorganic ammonium salt, fully dispersing, and sequentially drying and sintering to obtain the catalyst, the mass ratio of the carbon carrier to the iron-based metal salt to the inorganic ammonium salt is (5-8): (1-5): (20-25). According to the catalyst, based on the synergistic effect of the carbon carrier, the inorganic ammonium salt and the iron-based metal salt, the inorganic ammonium salt provides nitrogen for a catalyst system and forms fixed-point nitrogen doping with the carbon carrier, so that the binding property between the carrier and cobalt is improved, and the cobalt is ensured to be exposed on the surface of the catalyst; in addition, the blending of the inorganic ammonium salt and the iron-based metal salt can promote the dispersibility of the inorganic ammonium salt and the iron-based metal salt, so that the activity and the cycling stability of the catalyst are improved.

The invention relates to a method for preparing aniline through gas phase hydrogenation. The method comprises the following steps: reacting nitrobenzene and hydrogen under the action of a catalyst to obtain aniline, a carrier of the catalyst comprises modified silica gel, an active component of the catalyst comprises Cu, and an auxiliary active component of the catalyst comprises Co and / or Ce; the modification method of the modified silica gel comprises the following steps: carrying out alkali treatment on silica gel; the catalyst is prepared by the following steps: loading an active component Cu and an auxiliary active component on modified silica gel, and then carrying out heat treatment in an ammonia gas atmosphere to obtain the catalyst. The carrier silica gel of the catalyst is modified through alkali treatment, the surface and pore channel structure of the carrier is optimized, copper is used as an active component, Ce and / or Co are / is used as catalyst auxiliaries, and the catalyst is subjected to ammonia gas heat treatment modification; the catalyst is used for preparing aniline through gas-phase reduction of nitrobenzene and hydrogen, has excellent nitrobenzene conversion rate and aniline selectivity, and reduces the energy consumption and cost of aniline post-treatment.

The invention relates to the technical field of chloronitrobenzene hydrogenation catalysts, in particular to a chloronitrobenzene hydrogenation catalyst and a preparation method thereof.The method comprises the steps that 1, after an active metal source, a carbon source, a template agent and a solvent are mixed, the solvent is removed, and a solid is obtained; (2) roasting the solid obtained in the step (1) in an inert gas atmosphere to obtain a roasted product; and (3) contacting the roasted product with an acid solution, separating, washing and drying to obtain the hydrogenation catalyst. The active metal source is soluble salt of active metal, and the active metal is selected from one or more of Fe, Co, Ni, Cu and Zn; the template agent is selected from one or more of magnesium-containing compounds. According to the preparation method of the hydrogenation catalyst, the non-noble metal is selected, the pickling solution can be recycled, the catalyst is environment-friendly, the production and recovery cost is reduced, and the catalyst is excellent in performance and has no dechlorination phenomenon when being used for preparing chloroaniline through hydrogenation of chloronitrobenzene.

The invention relates to a method and a device for preparing an organic alkali salt of bis (fluorosulfonyl) imide. Ammonia gas, sulfuryl fluoride and liquid organic alkali are adopted as reaction raw materials, and under the condition that no solvent is added or a small amount of solvent is added, the raw materials react through pressurization to generate the organic alkali salt of the bis (fluorosulfonyl) imide. As no solvent is used or only a small amount of solvent is used in the reaction, the chroma of the obtained product is relatively low, and subsequent preparation of lithium bis (fluorosulfonyl) imide as a precursor is facilitated. The invention provides a simple and effective method for reducing the chromaticity of the imidodisulfuryl fluoride salt.

The invention discloses a method for catalyzing and photo-initiating nitro reduction through ferric trichloride, and belongs to the field of pharmaceutical compound synthesis. According to the method, transition metal salt is mainly used as a catalyst for reaction, inorganic acid and organic acid are used as additives, nitryl is reduced into amino under the condition of air or nitrogen, the catalytic efficiency is high, the yield of reduction products is high, the production cost is greatly reduced, and the method is suitable for synthesis and amplification of later compounds and has good application prospects. The method has the advantages of no expensive metal catalyst or reducing agent, simple preparation process, high efficiency, environmental protection, safety and cost saving.