34 results about "Alcohol oxidation" patented technology

The invention relates to the technical field of alcoholic strength measurement, and discloses a white spirit alcoholic strength measuring device which comprises a supporting seat, a sealing mechanism is arranged on the supporting seat, a first rotating rod is rotationally connected into the supporting seat, and a first twisting block is fixedly connected to the top of the first rotating rod. A first twisting block drives a first gear to rotate so as to enable the first gear to rotate in a supporting seat, a gear ring drives a second gear and a third gear to rotate, the third gear drives a first rack plate and a fixing plate to move, and along with continuous movement of the fixing plate, the fixing plate drives a rubber pad and a connecting plate to make contact with a protruding position of the edge of a wine jar opening. When the wine jar is used, the supporting seat is fixed on the wine jar opening, and the wine jar is in a sealed state, so that the supporting seat can be fixed on the wine jars with different sizes, the supporting seat can seal the wine jars with different sizes, white wine in the wine jars is prevented from being in contact with oxygen in the air for a long time in the measurement process, and it is ensured that oxidation and deterioration of alcohol cannot be caused.

The present invention relates to the field of photocatalytic alcohol oxidation, and more particularly to a TiO2 / NaBr photocatalytic system for selectively oxidizing primary alcohols to produce acids under mild conditions. The present invention utilizes TiO2 as a primary catalyst and a halide salt as a co-catalyst. In an organic solvent, a primary alcohol raw material is added, and the system is developed in situ under oxygen and blue LED visible light. This photocatalytic system can efficiently complex with primary alcohol compounds. At room temperature, under the pressure of an oxygen balloon, and using ethyl acetate as the reaction solvent, it can oxidize the hydroxyl groups in aromatic and aliphatic primary alcohols to the corresponding acids. This method offers the advantages of good product selectivity, high conversion efficiency, and mild conditions. Furthermore, the catalyst is easily recyclable and the production cost is low. This method is a successful example of the photocatalytic oxidation of the biomass alcohol platform compound n-butanol to n-butyric acid.

The invention discloses a difunctional alcohol dehydrogenase derived from Geobacillus thermodenitrifis, the difunctional alcohol dehydrogenase takes NAD < + > as a cofactor, can specifically catalyze a continuous oxidation reaction of omega-hydroxy fatty acid, and catalyzes the omega-hydroxy fatty acid to synthesize alpha, omega-binary fatty acid through single enzyme catalysis without an aldehyde intermediate. The alcohol dehydrogenase has dual catalytic functions of alcohol oxidation and aldehyde oxidation, the oxidation process from hydroxymethylene to carboxyl can be completed in one step, the reaction steps are simplified, accumulation and separation of intermediate aldehyde are avoided, the conversion efficiency is improved, and the alcohol dehydrogenase is alpha, omega-dibasic fatty acid and is a novel alcohol dehydrogenase. The invention provides a simple and efficient biocatalysis way for biosynthesis of dodecanedioic acid, especially dodecanedioic acid, and has important industrial application value.

The invention relates to the field of electrocatalytic materials, in particular to an anion modified NiCo hydroxide electrocatalytic material and application thereof. The NiCo hydroxide modified by phosphate radicals and other anions is synthesized through a two-step hydrothermal method, and the performance of the NiCo hydroxide for preparing amide through electro-catalysis ethanolamine oxidative coupling is studied. Taking the NiCo hydroxide modified by phosphate as an example, under the optimal condition, the productivity and Faraday efficiency of acetamide achieved by the NiCoPO catalyst reach the maximum value and are superior to those reported at present. It is found that the catalytic activity and stability of the catalyst can be remarkably improved through introduction of anions, and the yield and Faraday efficiency of acetamide in five cycles are kept relatively stable. Meanwhile, NiCoPO can efficiently catalyze oxidative coupling of other long-chain alcohols and aromatic ring alcohols with ammonia. The invention provides a new thought and method for developing an efficient and stable electrocatalyst, and also provides powerful support for industrial application of alcohol oxidative coupling preparation of organic compounds such as amide and the like.

This invention discloses a cobalt zeolite catalyst, its preparation method, and its application in the oxidation reactions of benzylamine, alcohols, and anisole sulfides, specifically relating to alcohol oxidation, amine oxidative coupling, and sulfide oxidation reactions. This invention further expands the application scope of cobalt zeolite catalysts, clarifying their suitability for the oxidation reactions of alcohols, amines, and sulfides. The catalyst is prepared via in-situ hydrothermal synthesis, and its catalytic performance can be optimized by precisely controlling pore size, cobalt species dispersion, and their existing forms. Under oxygen or air atmospheres, this catalyst can efficiently achieve highly selective oxidation of benzyl alcohols, while simultaneously promoting the oxidative coupling reactions of benzylamines and the selective oxidation reactions of sulfides. The cobalt zeolite catalyst provided by this invention has clearly defined application scenarios, mild reaction conditions, and demonstrates significant industrial application potential, providing important theoretical reference and practical direction for catalyst development in the field of green organic synthesis.

The invention provides a flowing membrane electrode for electrolytic hydrogen production coupled alcohol oxidation and an electrolytic hydrogen production coupled alcohol oxidation method. The flowing membrane electrode comprises an anode, an electrochemical diaphragm and a cathode; the anode and the cathode are arranged on the two sides of the electrochemical diaphragm respectively and are attached to the electrochemical diaphragm to form a sandwich structure; the thickness of the electrochemical diaphragm is 200 to 500 [mu] m; the anode and the cathode are respectively prepared by immobilizing a catalytic material in a conductive substrate; the conductive substrate has a porous structure, and the pore diameter of the porous structure is 100-500 [mu] m. By adopting an alcohol fed-batch feeding mode, through optimizing the alcohol concentration in a reaction fluid and combining with a porous structure flowing membrane electrode, relatively high selectivity of organic acid, Faraday current efficiency of an anode and hydrogen yield are realized in a long-term continuous electrolytic hydrogen production coupling alcohol oxidation reaction; the problems of low reaction rate and low accumulation amount of organic acid products are solved.

The application provides a multi-component platinum-bismuth-based intermetallic ordered nanosheet and a preparation method and application thereof, and relates to the technical field of multi-metal alloy catalysts.The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the application comprises platinum elements, bismuth elements and auxiliary metal elements, the auxiliary elements comprise 1-4 kinds of iridium elements, ruthenium elements, osmium elements, rhodium elements, tin elements and lead elements, and the multi-component platinum-bismuth-based intermetallic ordered nanosheet has an intermetallic ordered structure and a two-dimensional nanosheet morphology.The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the application is structurally stable, is applied to a fuel cell as a catalyst, and has excellent electrocatalytic performance, including formic acid oxidation electrocatalytic performance and alcohol oxidation electrocatalytic performance.The application provides a preparation method of the multi-component platinum-bismuth-based intermetallic ordered nanosheet, the preparation conditions are mild and simple to operate, and problems such as catalyst agglomeration caused by high-temperature calcination to transform an ordered phase are effectively avoided.

The present disclosure relates to a method for preparing acid by oxidation of alcohol and aldehyde, comprising: contacting alcohol reactant and aldehyde reactant with a catalyst to perform oxidation reaction in the presence of oxygen; the catalyst is a composite catalytic material, which comprises a framework heteroatom molecular sieve and a metal element M dispersed in the intracrystalline of the molecular sieve, the framework heteroatom molecular sieve is a molecular sieve in which at least part of silicon in a full-silicon molecular sieve framework is replaced by a heteroatom element Q, and the heteroatom element Q is one or more selected from titanium, boron, zirconium, tin, aluminum, phosphorus and germanium. The aldehyde co-oxidation reaction and the alcohol oxidation reaction can be coupled together to prepare acid under the conditions of oxygen oxidation and composite catalytic material catalysis, high conversion rate and acid selectivity are obtained, and the method has high industrial application value.

The invention provides a selective oxidation catalyst as well as a preparation method and application thereof. The main components of the catalyst are iron and molybdenum, potassium ferricyanide is added in the preparation process for modification, the structure of the catalyst is improved, the binding force between the components is enhanced, and therefore the stability and selectivity of the catalyst are improved. The catalyst prepared by the method can improve the strength of the catalyst after reaction, improve the binding force between active components and prolong the service life of the catalyst, and can be applied to preparation of aldehyde by alcohol oxidation.

The invention belongs to the technical field of electrochemical new energy conversion, and particularly relates to a preparation process of a nitrogen-doped carbon nanotube-based electrode material and high-efficiency conversion application of biomass alcohols of the nitrogen-doped carbon nanotube-based electrode material. The nitrogen doping controllable adjustment of NH2-CNT is realized by adopting a grinding and program temperature control annealing process, then the dispersion liquid is prepared, the dispersion liquid is loaded on carbon paper in a spraying and infrared lamp irradiation drying manner to prepare the electrode, and the electrode is applied to an electro-catalysis biomass alcohol oxidation system for the first time. The nitrogen-doped aminated multi-walled carbon nanotubes can realize excellent catalytic activity and biomass alcohol oxidation capacity, which are higher than those of commercial platinum-carbon and nitrogen-doped CNTs materials. The initial potential of the reaction is as low as 1.1 V vs.RHE, and the oxidation current can reach 80 mA / cm < 2 > under the potential of 1.6 V vs.RHE. The preparation process is simple, the production cost is low, industrial large-scale production is easy, and the method has wide application prospects in the fields of energy, environmental protection, electro-catalysis and the like.

The invention belongs to the field of alcohol catalytic oxidation, and particularly relates to a multi-component alloy alcohol oxidation electrode, preparation and application of the multi-component alloy alcohol oxidation electrode in an alcohol fuel cell, and the preparation method of the electrode comprises the following steps: depositing an M1-M2-M3-LDH material on a carbon-based carrier, and then performing reduction treatment to prepare an M1-M2-M3-multi-component alloy carbon-based carrier; and preparing a precursor electrode by taking the M1-M2-M3-multicomponent alloy and carbon-based carrier as an active material, and carrying out CV electrochemical etching in an acidic electrolyte by taking the precursor electrode as a working electrode to prepare the multicomponent alloy alcohol oxidation electrode, wherein M1 comprises at least one noble metal of Pt, Au, Ag, Pd and Ir; m2 comprises at least one divalent metal of Co, Ni, Cu, Zn and Mn; m3 comprises at least one trivalent metal of Ga, In, Bi, Sb and Fe; the molar weight ratio of M1 to M2 to M3 is 1: (1-8): (1-6); the number of CV circulation circles of the CV electrochemical etching is 10 to 100. The material provided by the invention can effectively resist the problem of CO poisoning, and can significantly improve the alcohol catalytic oxidation effect.

The invention relates to the field of preparation of an electro-catalytic methanol oxidation catalyst, and discloses a catalytic material as well as a preparation method and application thereof. The catalytic material comprises a carbon nanotube and ternary nanoparticles loaded on the carbon nanotube, wherein the ternary nanoparticles contain an Ni element, an Se element and a Pt element; wherein the mass ratio of the Ni element to the Se element to the Pt element is (0.1-10): (0.1-10): 1. The catalytic material disclosed by the invention is applied to an anode catalyst for electro-catalysis alcohol oxidation, especially to an anode catalyst for electro-catalysis methanol oxidation, and shows relatively good electrochemical performance.

A heterogeneous catalyst for alcohol oxidation reaction of an anode reaction in direct alcohol fuel cells is provided. The catalyst includes at least one Pt-based nanoisland deposited on an Au nanorod by using a synthesis process to form 4H / face-centered cubic (fcc) heterophase. The synthesis process include steps as follows: mixing a material A selected from platinum(II) bis(acetylacetonate), vanadium(III) acetylacetonate, and titanium oxide acetylacetonate with a solvent B selected from oleylamine and 1-octadecene to form a first mixture; adding a dispersion of C 4H / fcc Au nanorods into the first mixture to form a second mixture, in which ratio of A to B is in a range from 0.5 to 2, and a ratio of A to C is in a range from 2 to 6; heating the second mixture; and recovering a 4H / fcc Pt-based heterostructure with Au from the second mixture.

The invention belongs to the technical field of hydrogen production through methanol electrolysis, and provides a preparation method of a RuSe2-Pt bifunctional catalyst. According to the preparation method, RuSe2 is grown on the carbon with the high specific surface area, so that the growth area is provided for ruthenium selenide, and meanwhile, the carbon with the high specific surface area can enhance the conductivity of the RuSe2-Pt bifunctional catalyst; then RuSe2 growing on carbon with a high specific surface area is used as a Pt carrier to provide a seed site so as to facilitate Pt loading, meanwhile, RuSe2 with an oxyphilic characteristic is used as a carrier to provide an oxygen-containing substance at a low potential through a ligand effect, the adsorption capacity of CO generated in an alcohol oxidation reaction process is reduced through downward movement of a d-band center, the utilization rate of Pt is increased, and the catalytic activity of the catalyst is improved. Further, the catalytic performance of the RuSe2-Pt bifunctional catalyst is enhanced; moreover, through the synergistic effect and electronic interaction of RuSe2 and Pt, the density of electrons around Pt nano-particles can be regulated and controlled, and the electro-catalytic performance is improved.

The present application relates to a kind of molybdenum-containing catalyst composition, by adjusting the composition structure and loading mode of catalyst, thereby improving the heat transfer performance and physical strength of catalyst, adding polyethylene glycol during the preparation of catalyst to modify, so that the structure of the prepared catalyst is more fastened, the life of catalyst is extended.The catalyst prepared by the method can be applied to the industrial device for preparing aldehyde by alcohol oxidation, such as preparing formaldehyde by methanol oxidation, etc.

The invention discloses a synthesis method of a compound with a cephalotaxine tetracyclic skeleton, and belongs to the technical field of organic synthesis. According to the method, a compound shown in a formula (4) is obtained by taking a formula (1) with a cephalotaxine tetracyclic skeleton as a starting raw material through three-step conversion of carbonyl enol methylation, allylic oxidation and alcohol oxidation, so that efficient conversion of a cephalotaxine D-ring functional group is realized. The method is simple to operate, the used reagents are cheap and easy to obtain, the total yield of three steps can reach 34%, and large-scale production is facilitated.

The invention relates to the technical field of catalysis, and discloses a supported metal-based catalyst as well as a preparation method and application thereof. The supported metal-based catalyst comprises a carrier and active components, the carrier comprises nitrogen-doped carbon black, and the active components comprise Pd nanoparticles and bismuthyl carbonate; the supported metal-based catalyst contains oxygen vacancies. According to the supported metal-based catalyst, the catalytic activity of the Pd center is enhanced through the synergistic effect of Pd and bismuthyl carbonate, the catalytic efficiency is guaranteed in the alcohol oxidation esterification reaction, meanwhile, the dosage of the catalyst is reduced, and the cost is reduced.

The present application relates to a kind of catalyst for preparing aldehyde by oxidation method and its application, the catalyst is prepared by coprecipitation method, add trimethylol ethane and macromolecular polymer polyphenyl diamide during preparation process and modify, improve catalyst structure, enhance the binding force between components, so as to improve the stability and selectivity of catalyst.The catalyst prepared by the method can be applied to alcohol oxidation to prepare aldehyde industrial device, such as methanol oxidation to prepare formaldehyde, etc.

The invention discloses a bimetallic-doped metal organic framework material Pd-Cu-coated UiO-66-NH2, a Pickering emulsion based on the bimetallic-doped metal organic framework material Pd-Cu-coated UiO-66-NH2 and application of the Pickering emulsion, and belongs to the technical field of catalysts. The preparation method comprises the following steps: dissolving UiO-66-NH2 and Cu (NO3) 2.3 H2O in deionized water, and mixing and stirring to obtain Cu-coated UiO-66-NH2; the preparation method comprises the following steps: dissolving Cu-coated UiO-66-NH2 and Na2PdCl4 in deionized water, mixing and stirring, and then adding sodium borohydride for reduction, so as to obtain Pd-Cu-coated UiO-66-NH2. According to the invention, Pd-Cu-coated UiO-66-NH2 is used as an emulsifier, and toluene and water are used as solvents, so that the Pickering emulsion with stable Pd-Cu-coated UiO-66-NH2 is formed. The preparation method of the Pickering emulsion with stable Pd-Cu-coated UiO-66-NH2 is simple, and the Pickering emulsion shows relatively high catalytic capability and stability in an alcohol oxidation reaction.

This invention belongs to the interdisciplinary field of resource recovery from spent lithium-ion batteries and electrocatalytic energy conversion technology, and discloses a method for preparing an alcohol oxidation-coupled hydrogen production catalyst using spent ternary cathode materials. This method employs a synergistic strategy of electric field-driven delithiation and in-situ modification with iron hydroxide: first, the spent cathode material is pretreated, and then delithiation is performed via an electric field to convert it into a Ni-Co-Mn transition metal composite oxide, simultaneously recovering lithium carbonate; then, the transition metal composite oxide is mixed with iron salt, and after ultrasonic reaction, FeOOH grows in situ on the surface of the transition metal composite oxide and is loaded onto a nickel foam substrate to form a composite catalyst. The transition metal and FeOOH exhibit a significant synergistic catalytic effect, greatly enhancing the alcohol oxidation-coupled hydrogen production reaction, reducing the total electrolytic potential of water electrolysis, and improving hydrogen production efficiency. This invention features a simple process, mild reaction conditions, and combines the advantages of high-value resource recovery with low-energy hydrogen production.

The application discloses a synthesis method of a novel nickel-based metal organic framework material and application to methanol and ethanol oxidation. The application selects organic ligands 9,10-anthracene diacid, 2,4,6-tris(4-pyridyl)-1,3,5-triazine, nickel nitrate, and a mixed solution of a solvent system composed of deionized water, N, N-dimethylacetamide and 37% mass concentration HBF4, and obtains a porous metal organic framework material through a hydrothermal method, and the synthesized material is assembled into a three-electrode system to test electrocatalytic methanol and ethanol oxidation. The application has the advantages that the metal organic framework material has simple preparation process, high crystal purity, high yield and novel structure. The experimental test data analysis shows that the Ni-MOF material has superior electrocatalytic methanol and ethanol oxidation activity. After being compounded with acetylene black (AB), the composite material AB&Ni-MOF (1:1) has superior methanol and ethanol electro-sensing activity.

This invention relates to a membrane-free process for the co-production of formate via carbon dioxide electroreduction coupled with alcohol oxidation, belonging to the field of electrocatalysis. Based on the coupling of cathode carbon dioxide electroreduction and anodic small-molecule alcohol oxidation, this invention establishes a novel ion-exchange membrane-free process for the co-production of formate at both cathode and anode. Compared to traditional carbon dioxide electroreduction processes, this invention fundamentally eliminates the mass transfer resistance of ions at the exchange membrane, avoiding secondary carbon emissions during CO2 electroreduction. Simultaneously, the co-production of formate at both cathode and anode simplifies the product separation process and reduces separation costs from a product engineering perspective. By avoiding the use of expensive and periodically replaceable ion exchange membranes, the process operating costs are reduced, while the equipment's operating cycle is extended. The proposed replacement of the OER reaction with small-molecule alcohol oxidation significantly reduces process energy consumption and yields formate products with a much higher added value than oxygen, providing a novel approach for the industrial application of carbon dioxide electroreduction.

The invention belongs to the crossing field of waste lithium ion battery resource recycling and electro-catalysis energy conversion technologies, and discloses a method for preparing an alcohol oxidation coupling hydrogen production catalyst by using a waste ternary positive electrode material. The method adopts a synergistic strategy of electric field driven lithium removal and iron hydroxide in-situ modification, and comprises the following steps: firstly, pretreating the waste positive electrode material, converting the waste positive electrode material into Ni-Co-Mn transition metal composite oxide through electric field driven lithium removal, and synchronously recovering lithium carbonate; then the transition metal composite oxide is mixed with ferric salt, through ultrasonic reaction, FeOOH grows on the surface of the transition metal composite oxide in situ and is loaded on the foamed nickel substrate, a composite catalyst is formed, transition metal and FeOOH have a remarkable synergistic catalytic effect, the alcohol oxidation coupling hydrogen production reaction is greatly improved, the total potential of electrolyzed water is reduced, and the hydrogen preparation efficiency is improved. The method is simple in process and mild in reaction condition, and has the advantages of high-value recovery of resources and low-energy-consumption hydrogen production.

The application discloses an Au@Pt core-shell structure supported catalyst, which comprises a carrier and Au@Pt nanoparticles supported on the carrier, the Au@Pt nanoparticles are in a core-shell structure, wherein the core layer is Au, the shell layer is Pt, the particle size of the Au@Pt nanoparticles is 2-10 nm, the diameter of the core layer is 1-3 nm, and the thickness of the shell layer is 1-7 nm. The application further discloses a preparation method of the Au@Pt core-shell structure supported catalyst and application of the catalyst in an alcohol oxidation process. According to the method, the alcohol oxidation catalyst can be prepared only through room-temperature liquid-phase reduction, the process is simple and convenient, the prepared catalyst has a unique core-shell structure, and the catalyst has excellent catalytic activity and stability, so that the reaction system can realize high conversion rate oxidation of alcohol to obtain corresponding carboxylic acid without adding an external alkali.

Disclosed are a genetically engineered bacterium catalyzing the production of a quinoline compound, and a use thereof. The genetically engineered bacterium expresses monoamine oxidase and an enzyme capable of catalyzing alcohol oxidation, the enzyme capable of catalyzing alcohol oxidation being selected from alcohol oxidase or alcohol dehydrogenase. It has been unexpectedly discovered that monoamine oxidase coupled to alcohol dehydrogenase or alcohol oxidase can catalyze the preparation of quinoline from amino alcohol substrates, which fills the gap that current biocatalysis methods cannot synthesize amino alcohol substrates into quinoline compounds.

The application discloses a Pd@UIO66-NH2@COF Pickering emulsion based on a core-shell structure and a preparation method and application thereof, and belongs to the field of catalytic synthesis. The Pd@UIO66-NH2@COF is used as an emulsifier, toluene and water are used as solvents, and a Pd@UIO66-NH2@COF stable Pickering emulsion is formed. The Pd@UIO66-NH2@COF stable Pickering emulsion disclosed by the application has the advantages of simple preparation method and high catalytic capacity and stability in alcohol oxidation-Knoevenagel series reaction.

The invention discloses a method for preparing aldehyde or ketone by catalytically oxidizing alcohol, which is characterized in that in the presence of an oxonium nitrate compound, an alcohol compound is subjected to oxidation reaction to generate corresponding aldehyde or ketone. The method provided by the invention has the advantages of mild reaction conditions, wide substrate universality, and realization of efficient catalysis of alcohol oxidation without metal and other co-catalysis in the reaction, and is a method suitable for industrial production.

The application belongs to the technical field of catalyst forming, and particularly relates to a method for secondary forming of titanium silicalite TS-1 waste powder, which comprises the following steps: S1, grinding titanium silicalite TS-1 waste powder to 60 mesh or less, adding a pore forming agent and mixing, and then adding TS-1 mother liquor and kneading to obtain a cohesive block; S2, extruding the cohesive block into a wet base strip to obtain a wet base strip-shaped catalyst; S3, drying the wet base strip-shaped catalyst to obtain a dry base strip-shaped catalyst; and S4, calcining the dry base strip-shaped catalyst to obtain an extruded strip-shaped catalyst. The TS-1 catalyst prepared by the application is used for various oxidation reactions such as olefin epoxidation, aromatic hydroxylation, ketone ammoxidation, alkane selective oxidation, oxidative desulfurization and alcohol oxidation, realizes secondary utilization of the waste powder and the TS-1 mother liquor, reduces the catalyst preparation cost, reduces environmental pollution, and the mechanical strength of the secondary extruded strip-shaped TS-1 catalyst is 1.5 times that of the prior art.

This invention discloses a method for preparing 6,10,10-trinitro-2-oxa-6-azaadamantane-4,8,9-triol trinitrate, belonging to the field of organic synthesis technology. Using 1,3,5,7-cyclooctatetraene as a starting material, the method involves oxidative cyclization, ammonolytic cyclization, Boc protection and silane ether protection, secondary alcohol oxidation, deBoc acetylation, oximeization, geminitrohydration, and nitration to finally synthesize 6,10,10-trinitro-2-oxa-6-azaadamantane-4,8,9-triol trinitrate. The synthesis method is simple, and the final product exhibits stable properties. This invention addresses the lack of research on "azaadamantanes" (alkanes with nitrogen and oxygen heteroatoms synergistically introduced onto the same adamantane skeleton) and the general lack of substituents available for in-depth functionalization in existing adamantane skeleton construction methods. Furthermore, it introduces six explosive groups into the synthesized skeleton, resulting in a product with high density and excellent detonation performance.