83 results about "Organocatalysis" patented technology

The invention discloses a preparation method of a carbon composite material doped with multiple metal elements. The preparation process comprises the following steps: S1, dispersing a porous carbon precursor, organic lithium fluoride, an organic rare earth compound and an organic catalyst in a solvent, performing hydrothermal reaction, and drying to obtain a porous carbon precursor loaded with lithium / rare earth element / catalyst; s2, uniformly mixing the obtained material with an activating agent and a doping agent, and activating at the temperature of 900-1100 DEG C to obtain multi-metal element doped porous carbon; and S3, carrying out reduction treatment and surface passivation treatment on the multi-metal element doped porous carbon to obtain the multi-metal element porous carbon composite material. According to the obtained material, lithium-doped and rare earth-doped porous carbon is utilized to improve the electronic conductivity of the material and increase the interlayer spacing of the carbon material, a carbon nanotube is grown by utilizing a catalyst to improve the conductivity of the material and reduce expansion, and through reduction and passivation treatment, the surface activity of the material is reduced, and the first efficiency is improved.

The invention provides a preparation method of sclareolide and a catalyst, and belongs to the technical field of organic catalysis. The method comprises the following steps: dissolving sclareol by using a first solvent, adding a catalyst, adjusting the pH value of the solution under microwave conditions, dropwise adding hydrogen peroxide, heating and stirring for reaction, separating the catalyst, reusing, extracting the product by using a second solvent, and heating and refluxing to obtain sclareolide; the catalyst is imidazolyl ionic liquid / polyethylene glycol / maleic acid modified graphene oxide loaded with vacancy heteropolyacid salt. According to the preparation method of sclareolide, microwave-assisted reaction is adopted, so that the product yield of sclareolide is greatly improved. According to the invention, two mutually compatible reaction systems of alcohol and water are adopted, so that the environmental protection property of the process is greatly improved, and meanwhile, under the action of the catalyst, the method has a phase catalytic transfer effect, the reaction efficiency is improved, the reaction condition is mild, the product yield is high, and the method has a wide application prospect.

The application belongs to the field of catalyst synthesis, and relates to a polymer polynuclear boron organic catalyst, a preparation method and application thereof, the preparation method of the catalyst comprises the following steps: adding tetrahydrofuran into a catalyst precursor, then adding a borohydride reagent drop by drop, heating the reaction mixture at 25-80 DEG C for 22-26 h, vacuum concentrating the reaction mixture to obtain a crude product, purifying the crude product by washing with pentane for 2-5 times, and vacuum drying the product at normal temperature for 10-14 h to obtain the catalyst; the catalyst precursor and a preparation method thereof are also provided; the polymer polynuclear boron organic catalyst provided by the application has the advantages of high activity, simple preparation method and low cost, and the catalyst can control the polymer substrate type and the polymer type by adjusting the reaction conditions, the catalytic system and the substrate, and can efficiently prepare polymers such as polyether, polyester and polycarbonate due to the synergistic effect of the polynuclear boron center, so that the types of the organic catalyst and the polymer are greatly expanded.

The application discloses a method for synthesizing nitrogen-containing heteroarene carboxylic acid compounds based on nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction and belongs to the technical field of organic synthesis, and specifically comprises the following steps: adding a reaction substrate, an organic catalyst, a base and an additive into a reaction container, then adding a solvent under a CO2 atmosphere, and stirring and reacting at room temperature or under heating in a light irradiation condition; and performing post-treatment on a reaction product, separating and purifying the reaction product, and obtaining nitrogen-containing heteroarene carboxylic acid compounds and derivatives thereof. The scheme has the characteristics of mild reaction condition, wide reaction substrate range, good yield and good regioselectivity, and cheap and easily-obtained raw materials, can efficiently realize nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction, synthesize important nitrogen-containing heteroarene carboxylic acid compounds, and has a good application prospect.

The invention discloses a high performance liquid chromatography analysis method for trace impurity content in an organic amine catalyst, and relates to the field of organic catalyst content analysis. Comprising the following steps: pretreating an organic amine catalyst sample, preparing a urea standard solution, performing HPLC (High Performance Liquid Chromatography) analysis and performing quantitative analysis by an external standard method, namely performing derivatization reaction on urea and benzaldehyde under an acidic condition, and successfully converting urea without ultraviolet absorption into dibenzylidene urea (DBU) with strong ultraviolet absorption, the technical blank of direct detection of urea is effectively filled, and the method is adaptive to a conventional ultraviolet / visible light detector to realize accurate detection. And the method has relatively high practical popularization and application values. The method has the advantages of being good in separation effect, high in sensitivity, easy and convenient to operate, high in reproducibility and the like, and can be widely applied to qualitative and quantitative analysis of various trace impurities in the organic amine catalyst.

The application discloses a triphenylmethane polyether dye and a preparation method thereof, and the preparation method comprises the following steps: (1) adding an organic catalyst and an oxidant into a triphenylmethane polyether dye leucoaqueous solution in the interval of 40-60 DEG C, adding an acid-binding agent to maintain a proper pH, and completing oxidation; the organic catalyst is a ferrocene-rotene iron compound; (2) adjusting the pH with an acid-binding agent aqueous solution, removing the organic catalyst by hot filtration, removing water through vacuum distillation of the filtrate, and performing pressure filtration to obtain the triphenylmethane polyether dye. The improved rotene iron catalyst is used in the application, the catalytic effect is obviously improved, the reaction temperature and activation energy are reduced, the defects of excessive hydrogen peroxide oxidation are overcome, and the obtained product meets the EN71-3 standard.

The invention provides a preparation method and application of an amorphous zirconium-doped manganese oxide catalyst, and belongs to the field of organic catalytic synthesis. The catalyst is Zr-MnO2-x, and is rich in lattice oxygen with high activity and high stability; x is the molar ratio of Zr to the sum of Mn and Zr, and x is larger than or equal to 0.2 and smaller than or equal to 0.6; zirconium mainly exists in the form of zirconium hydroxide. The preparation method comprises the following steps: slowly dropwise adding a mixed salt solution of a zirconium source and a manganese source into a precipitant under a continuous stirring condition, and carrying out a co-precipitation reaction; after the reaction is completed, standing and aging, carrying out solid-liquid separation and collecting a precipitate; and washing and drying to obtain the amorphous zirconium-doped manganese oxide catalyst which is used for catalyzing aniline and derivatives thereof to synthesize azobenzene compounds. According to the invention, the characteristic of'difunctional lattice oxygen 'with high activity and high stability is introduced through zirconium doping, and the catalyst has the advantages of high activity, high selectivity, wide substrate applicability, excellent stability and reusability and the like when used for catalytic synthesis of azobenzene compounds.

The invention discloses an ultrasonic enhanced organic catalytic continuous flow polypeptide synthesis method. The preparation method comprises the following steps: (1) respectively dissolving an amino alcohol initiator, an organic catalyst and an amino acid intracyclic anhydride monomer in an organic solvent; (2) injecting the three solutions into a tubular reactor equipped with an ultrasonic water bath constant-temperature oscillator; (3) realizing continuous flow precise synthesis of polypeptide with different molecular structure parameters by adjusting the types of three reactants, namely an amino alcohol initiator, an organic catalyst and an amino acid intracyclic anhydride monomer, the sequence of injecting the reactants into the reactor and the relative speed of injecting the reactants into the reactor; and (4) carrying out flowing ring-opening polymerization reaction, flowing into a collecting bottle containing a reaction terminator, precipitating, centrifuging, and carrying out vacuum drying to remove the residual solvent, thereby obtaining the polypeptide. The method provided by the invention has the characteristics of high synthesis efficiency, no metal catalyst residue in the product, easy regulation and control of product structure parameters, easy non-amplification, easy large-scale production and easy automatic production.

The application discloses a supported chiral phosphine heterogeneous catalyst and a preparation method and application thereof, and relates to the technical field of heterogeneous catalyst preparation. The method comprises the following steps: mixing hollow mesoporous polystyrene nanospheres, chiral phosphine and DCE, stirring, adding FDA, stirring, adding concentrated sulfuric acid dropwise, and reacting to obtain a reactant one; and mixing the reactant one, toluene, tetramethyldisiloxane and tetraisopropyl titanate, and reacting under temperature rise to obtain the supported chiral phosphine heterogeneous catalyst. The application is simple and convenient in a one-pot method, and can efficiently anchor the chiral phosphine and its oxide catalyst to the carrier. The application solves the problems of complicated modification in the existing organic catalyst immobilization process and mass transfer limitation of the prepared catalyst.

The application discloses a single-molecule bifunctional organic catalyst, and a structural formula is shown in the following formula (I), wherein X is selected from a urea or thiourea containing group, a structural formula is shown in the following formula (II), Y is selected from a potassium alcoholate or sodium alcoholate group, a structural formula is shown in the following formula (III), and L is selected from an unsubstituted C2-C4 alkyl group; the single-molecule bifunctional organic catalyst disclosed by the application has a novel structure, has super-high activity and high controllability when catalyzing ring-opening polymerization of a lactone, and the highest turnover number (TON) can reach 900, and the highest turnover frequency (TOF) can reach 4860 min ‑1 , and the prepared polymer has high molecular weight and low molecular weight distribution.

This invention provides a neutral-electron-reversed carbene, its preparation method, and its applications, belonging to the fields of organic chemistry and organic catalysis. The neutral-electron-reversed carbene described in this invention has the structure shown in formula (I). This invention synthesizes the neutral-electron-reversed carbene in one step by reacting a diazo compound as a precursor with a rhodium complex, followed by nitrogen removal and COD (1,5-cyclooctadiene) removal processes. The reaction conditions of this invention are simple, and the yield is good. Stable separation of neutral-electron-reversed carbene is achieved for the first time.

A rolling roll according to an embodiment of the present invention comprises: a roll base material; and a chromium-containing plating layer which is formed on the roll base material and in which the maximum length of cracks formed on the surface thereof is 5 µm or less. A rolling roll according to another embodiment of the present invention comprises: a roll base material; a chromium-containing plating layer formed on the roll base material; and a first coating layer formed on the chromium-containing plating layer and containing a titanium nitride. A method for manufacturing a rolling roll according to another embodiment of the present invention comprises the steps of: forming surface recesses and projections on the surface of a roll base material; forming a chromium-containing plating layer on the roll base material by using a plating solution containing a chromium-containing raw material and sulfuric acid; and applying a metal nitride onto the chromium-containing plating layer. In the step of forming the chromium-containing plating layer, the plating solution further contains a sulfonic acid-based organic catalyst, or plating is performed in a state in which the plating solution has been heated to 65-90°C. A method for manufacturing a secondary battery according to another embodiment of the present invention comprises the steps of: forming an electrode active material layer on a current collector; and rolling the electrode active material layer using said rolling roll.

The invention relates to a catalyst composition and a preparation method of thermotropic liquid crystal polyarylester under catalysis. The catalyst composition comprises an organic catalyst and an inorganic catalyst. The polymerization reaction rate is obviously improved, and the thermotropic liquid crystal polyarylester is efficiently prepared. The thermotropic liquid crystal polyarylester prepared by the method has excellent comprehensive performance, high modulus and high thermal stability, and has important application value in the field of high-performance composite materials.

The invention provides a catalyst as well as a preparation method and application thereof, and relates to the technical field of organic catalytic synthesis, the catalyst comprises a mesoporous zirconium-silicon composite oxide, and active metal cobalt and auxiliary metal which are loaded on the mesoporous zirconium-silicon composite oxide; the auxiliary metal comprises one or two of copper metal and nickel metal. Based on the catalyst provided by the invention, the problems of high cost, low active metal utilization efficiency, poor carrier stability and many byproducts of the catalyst in the prior art are solved.

The invention relates to a synthetic method of high polymer material polyester, in particular to a method for synthesizing polyester through ring opening polymerization of cyclic ester monomers. According to the invention, an imidazolyl ionic liquid with 1-alkyl-3-methylimidazole cation as a catalyst is used for catalyzing ring opening polymerization of a cyclic ester monomer to obtain polyester. According to the invention, the imidazolyl ionic liquid is used as a catalyst, the catalytic activity is high, the cyclic ester monomer can be subjected to ring-opening polymerization without an alcohol initiator, and under the condition of short reaction time, the monomer conversion rate is high, the number-average molecular weight of the product is high, and the molecular weight distribution is narrow; the technical problem that an existing organic catalyst applied to catalysis of polyester ring-opening polymerization is relatively low in catalytic activity is solved. The imidazolyl ionic liquid catalyst has the characteristics of low toxicity and no pollution; the method for catalyzing ring opening polymerization of the cyclic ester monomer through the imidazolyl ionic liquid is a green synthesis method of polyester.

The present application relates to a kind of sulfonated metal Salen and polyether ionic liquid binary system catalysis method for preparing cyclic carbonate by the ring addition of CO2 and epoxide;In order to improve the shortcomings that metal complex catalyst is difficult to realize recycling and organic catalyst has lower catalytic activity, the present application combines metal complex catalyst with organic catalyst, creates a kind of sulfonated metal Salen and polyether ionic liquid binary catalytic system, realizes the efficient synergistic catalysis of sulfonated metal Salen and polyether ionic liquid;The binary catalyst has the advantages of simple construction, high catalytic activity and selectivity, easy separation cycle, long life and low loss, meets the process requirements of green synthesis.

The application belongs to the technical field of organic synthesis, and particularly relates to a kind of bromine-containing isoindoline-1-ketone compound and preparation method thereof.The preparation method of the bromine-containing isoindoline-1-ketone compound uses commercially available aldehyde-derived imine as raw material, is reacted with aryl bromide oxazoline compound under butyl lithium condition, and then is subjected to acid-mediated cascade cyclization process, to efficiently construct isoindoline-1-ketone skeleton.The isoindoline-1-ketone compound can be directly used as an organic catalyst, the N-H functional group remaining in the structure of the isoindoline-1-ketone compound has reactivity, can be coupled with other bioactive molecules as a key connection site, to construct functional derivatives, the amide carbonyl group thereof can be further reduced, to be converted into pyrrolidine structural unit, and the structure itself can be used as a catalytically active center, to expand its application in the field of catalysis.

The invention discloses a method for synthesizing a chiral pyrazolone imine derivative based on an asymmetric aza-Henry reaction catalyzed by an organic catalyst, which comprises the following steps: placing a pyrazolone imine compound and a nitroalkane compound in a solvent, adding the organic catalyst, and reacting at-78-60 DEG C while stirring to prepare the target product chiral pyrazolone imine derivative. Or placing the pyrazolone imine compound and brominated nitromethane in a solvent, then adding an organic catalyst, carrying out a stirring reaction at-78 to 60 DEG C to prepare a chiral pyrazolone imine derivative, and further carrying out debromination to obtain the target product, namely the chiral pyrazolone imine compound. The asymmetric aza-Henry reaction of the pyrazolone imine compound and the nitroalkane compound or the bromo-nitromethane is successfully realized on the basis of the small organic molecule catalyst, and the asymmetric aza-Henry reaction has the advantages of low catalyst consumption, high reaction rate (the fastest reaction rate is 0.5 h), high enantioselectivity (the highest reaction rate reaches 96% ee), good universality of reaction substrates and the like.

The invention belongs to the technical field of butyraldehyde compound synthesis. The method provided by the invention is operated at normal pressure and mild temperature, does not need ozone, subzero treatment and a special oxidation device, and does not depend on a metal / chiral organic catalyst and a molecular sieve; the reagent is cheap, safe and easy to obtain, has high tolerance to air and trace water, and is simple and convenient to operate. The invention provides a method for preparing a 4-arylthio butyraldehyde compound, which comprises the following steps: reacting a thiophane sulfosalt derivative and sodium carbonate in dimethyl sulfoxide under certain reaction conditions to obtain the 4-arylthio butyraldehyde compound, and the reaction equation is shown in the specification.

The present invention relates to the technical field of polymer synthesis and depolymerization. Disclosed is a method for preparing a polycarbonate polyol by mean of organocatalyzed irreversible polycondensation. The method comprises the following step: preparing a diol substrate and diphenyl carbonate into a polycarbonate polyol under the action of an organic catalyst by means of polycondensation of a carbonic ester. In the present invention, a polycarbonate polyol having a high added value can be efficiently synthesized by means of the catalytic system. Compared with catalysis by using inorganic matters and metal organic matters in the prior art, the present invention has the characteristics of a high selectivity, wide application, etc. The polycarbonate polyol is a material having good hydrolysis resistance, light resistance, oxidation degradation resistance and heat resistance, can be used for preparing elastomers, paints, coatings or adhesives, has a high strength, good weather resistance, chemical stability, etc., and has a great commercial application potential in the fields of microelectronics industry, chip packaging, buildings, medical treatment, etc.

This invention relates to the field of organic catalysis and discloses a method for catalyzing the ammonolysis of bis(hexamethylene)triamine. The catalyst comprises a support and a main active component and an auxiliary agent supported on the support. The main active component is Ni, the auxiliary agent includes La, and the support comprises alumina, with the alumina content being 50-80 wt% of the total weight of the support. Using the method of this invention, high conversion and selectivity can be obtained when catalyzing the ammonolysis of bis(hexamethylene)triamine, and the catalyst also exhibits high stability.

This invention belongs to the fields of organic catalysis and asymmetric catalysis, and relates to a bichiral synergistic nitrogen heterocyclic carbene-oxynitrile adduct catalyst, its preparation method, and its application. The catalyst is composed of a nitrogen heterocyclic carbene unit and an oxynitrile unit, wherein both the nitrogen heterocyclic carbene and oxynitrile moieties can incorporate chiral structural units, thereby constructing a synergistic chiral environment composed of two chiral sources within the overall catalyst structure. This structural design allows for a more refined stereoselectivity control during the catalytic reaction, thereby enhancing the catalyst's stereoinductive ability in asymmetric catalytic reactions. The catalyst is prepared through a modular synthesis process, which involves fewer steps and is safe and simple to operate, and the catalyst structure is easily modulated. Applying this catalyst to acyl rearrangement reactions enables effective control of the reaction's stereoselectivity, thereby efficiently synthesizing various indolones or benzofuranones containing a chiral quaternary carbon center at the C3 position.

The invention discloses a preparation method and application of a ruthenium-based catalyst, and belongs to the field of organic catalytic synthesis. The preparation method comprises the following steps: adding glacial acetic acid into a reaction container, adding tetrabutyl titanate while stirring at room temperature, stirring, transferring into a reaction kettle with a polytetrafluoroethylene lining, crystallizing, cooling to room temperature, filtering and washing with absolute ethyl alcohol, drying overnight, and calcining a collected sample to obtain TiO2; the method comprises the following steps: at room temperature, adding a RuCl3 solution into a container, then adjusting the pH value of the RuCl3 solution by using a NaOH solution, adding TiO2 into the solution, then adjusting the pH value of the solution by using the NaOH solution, stirring, heating a suspension, continuously stirring, standing, precipitating, centrifugally filtering, washing by using deionized water, drying, and marking as Ru / TiO2-Fresh; taking Ru / TiO2-Fresh, dispersing the Ru / TiO2-Fresh in deionized water, mixing and stirring, dropwise adding a reducing agent for reaction, washing with deionized water for multiple times, and then drying to obtain the ruthenium-based catalyst. The catalyst provided by the invention realizes the preparation of high-density aviation fuel by catalyzing one-step hydrogenation saturation of polycyclic aromatic hydrocarbon.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a C3N5 confined ruthenium dioxide nano-catalyst as well as a preparation method and application thereof. The nano-catalyst comprises a C3N5 carrier and RuO2 nano-particles, wherein the surface layer of the C3N5 carrier is coated with the RuO2 nano-particles; wherein the loading capacity of the noble metal Ru in the nano-catalyst is 3-5wt%. RuO2atC3N5 with a layered stacked rod-like structure is prepared by adopting C3N5 to limit ruthenium dioxide, nanoparticles are arranged on the surface layer of the catalyst, and ruthenium dioxide nanoparticles are coated on the surface layer of a carrier. The catalyst is simple in preparation method, low in cost and suitable for large-scale synthesis, has high potential industrial application value in the field of energy catalysis, and can be used for electrocatalytic water decomposition reaction, oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CO2RR) and various organic catalytic reactions.

This invention provides a method that uses an inexpensive catalyst to directly and selectively decompose lignin contained in lignocellulosic raw materials without extraction, and that also contributes to the miniaturization of lignocellulosic raw materials. [Solution] The method for decomposing lignin contained in a lignocellulosic raw material according to the present disclosure comprises a mixing step of mixing a lignocellulosic raw material mainly comprising cellulose, hemicellulose, and lignin, at least one organic catalyst selected from diaryl ketones, and an organic solvent to obtain a mixture, and a step of irradiating the mixture with light to decompose the lignin while removing it from the lignocellulosic raw material.

The invention relates to a method for producing dendritic fibrous structure silica nanoparticles comprising : providing a solution comprising water, a templating agent, a silica precursor and an inorganic catalyst; heating the solution in a closed tube or vessel at a temperature between 150 °C and 200°C, preferably 150°C, at a pressure between 2 and 5 bar; removing the templating agent by calcination or by acid solution extraction or by heat treatment.

The invention relates to an organic catalyst for 2-heptanone synthesis reaction and a preparation method and application thereof.The organic catalyst is prepared from, by weight, 7-45 parts of active components, 0.1-2.5 parts of auxiliaries and 50-120 parts of carriers, the active components comprise the first active component and the second active component, the weight ratio of the first active component to the second active component is (60: 1)-(3: 1); wherein the first active component is one or more of iron oxide, tungsten oxide, molybdenum oxide, titanium oxide, chromium oxide, vanadium oxide, copper oxide, zinc oxide, nickel oxide, cobalt oxide and manganese oxide; and the second active component is one or more of lanthanum, cerium, indium, praseodymium, neodymium, gadolinium and holmium.

The invention discloses a bicyclo [4.1. 1] octane azafluorene derivative with a structural formula shown as a formula I. A preparation method comprises the following steps: reacting a 2-(2-(2-hydroxybenzylidene)-2, 3-dihydro-1H-indenyl-1-methylene) malononitrile derivative for 0.5-6 hours in the presence of an organic or inorganic base catalyst and a DMF (Dimethyl Formamide) solvent at the temperature of 40-150 DEG C, adding distilled water after the reaction is finished, and reacting for 0.5-6 hours at the temperature of 40-150 DEG C to obtain the bicyclo [4.1. 1] octane azafluorene derivative with the structural formula shown as the formula I. The invention further discloses a preparation method of the bicyclo [4.1. 1] octane azafluorene derivative. Extracting with ethyl acetate, drying with anhydrous sodium sulfate, filtering, concentrating, and carrying out column chromatography separation. The invention provides a simple, efficient and convenient preparation method of the bicyclo [4.1. 1] octane azafluorene derivative, and the preparation method has the advantages of high efficiency, convenience, low cost and the like, and has a good application prospect. The derivative can be applied as an organic catalyst or an organic photoelectric material, a fluorescent material and the like.

The present invention provides a method for highly selectively producing formic acid at room temperature and atmospheric pressure using a reusable organic catalyst without using hydrogen or a metal catalyst. [Solution] One aspect of the present invention relates to a method for producing formic acid, which comprises irradiating a solution containing carbon dioxide as a carbonate source and a base or carbonate salt as a carbonate source, a hydrogen source, and a solvent with light at room temperature and atmospheric pressure in the presence of one or more hydrogen atom transfer catalysts selected from the group consisting of an N-heterocyclic carbene catalyst, an imidazolium-2-carboxylate catalyst, an imidazolinium-2-carboxylate catalyst, an imidazolium salt catalyst, an imidazolinium salt catalyst, a triazolium salt catalyst, a triazolium catalyst, and a thiazolium salt catalyst, and one or more photosensitizers selected from the group consisting of a carbazole catalyst.