681 results about "Acetylene" patented technology

The invention relates to an acetylene purification system and method, in particular to a method for removing impurities in acetylene to an electronic-grade acetylene level through a membrane separation technology coupled rectification process, and belongs to the field of gas separation. Aiming at the characteristics of an industrial grade acetylene material, the invention provides a technology for preparing electronic grade acetylene based on membrane separation coupling rectification, the membrane separation technology and the rectification technology are organically coupled, and a safe solvent is introduced into a rectification tower, so that the thermal stability of liquid acetylene is effectively improved, and the explosion risk is remarkably reduced. According to the technology, efficient preparation of the electronic-grade acetylene (the purity is greater than or equal to 99.9999%) is realized, and the method has a good industrial application prospect and popularization value.

To provide a method for producing a triazole skeleton-containing polymer having a desired substituent, and to provide the triazole skeleton-containing polymer.SOLUTION: The present invention provides a method for producing a triazole-skeleton-containing polymer, the method including a step of reacting an acetylene group contained in a starting material polymer with an azide group-containing compound to obtain the triazole-skeleton-containing polymer, the starting material polymer being a polymer containing a first monomer unit 1A derived from a monomer having the acetylene group and a second monomer unit derived from a second monomer, the triazole-skeleton-containing polymer having a triazole-skeleton-containing monomer unit and the second monomer unit.SELECTED DRAWING: None

The invention relates to the technical field of special cables, and discloses a high and low temperature resistant composite insulating layer cable and a preparation method thereof.The cable comprises a conductor core and a composite insulating layer wrapping the conductor core, and the composite insulating layer comprises a high temperature resistant heat conduction core layer and a low temperature resistant elastic layer; the high-temperature-resistant heat-conducting core layer is prepared from the following raw material: polyamide acid; hexagonal boron nitride; alpha-phase silicon carbide; the preparation method comprises the following steps: adding gamma-amino propyl triethoxy silane; nano barium titanate; the low-temperature-resistant elastic layer is prepared from the following raw materials: vinyl terminated polydimethylsiloxane; performing hydrophobic treatment on fumed silica; a Karstedt catalyst; a hydrogen-containing silicone oil crosslinking agent; the average particle size D50 of the 1-ethynyl-1-cyclohexanol and the alpha-phase silicon carbide is 0.5 to 2 mu m. According to the invention, by adopting a microwave selective heating and interlayer heat conduction mechanism, efficient and high-quality integrated curing of the composite insulating layer is realized.

The invention is suitable for the technical field of water electrolysis hydrogen production, and provides an alkyne-rich carbon-ruthenium nickel alloy catalyst and a preparation method and application thereof. The preparation method comprises the following steps: simultaneously adding a ruthenium salt solution, a nickel salt solution and an organic molecule solution into an alkyne-enriched carbon dispersion liquid for reaction; and carrying out centrifugation, cleaning and vacuum drying treatment on the reacted mixed solution to obtain the alkyne-rich carbon-ruthenium nickel alloy catalyst. According to the invention, the acetylene-rich carbon-ruthenium nickel alloy catalyst uniformly loaded with ruthenium nickel (RuNi) clusters is successfully prepared. In the performance evaluation of hydrogen production by water electrolysis in a simulated seawater environment, the material shows excellent hydrogen evolution activity as a cathode catalyst. Experimental results show that under the applied potential of-0.6 V (relative to a reversible hydrogen electrode, RHE), the absolute value of the current density can reach 0.847 A cm <-2 > to 0.896 A cm <-2 >. The invention provides a feasible material solution for developing a high-performance water electrolysis hydrogen production catalyst suitable for a complex water quality environment.

The invention discloses a fluorescent probe for rapidly detecting acetylene, the fluorescent probe is a metal nanocluster solution, and the metal nanocluster solution has a fluorescence emission peak and is used for being in contact with acetylene to generate static fluorescence quenching. The invention further discloses a preparation method, the problems that an existing gas chromatography technology for detecting acetylene is long in consumed time, high in operation specialty and high in cost are solved, and the glutathione modified copper nanocluster solution has high sensitivity and linear response, can detect acetylene in a low concentration range (such as 0.26 nL / L-26000 mu L / L) and has a good linear relation. The stability of the GSH-Cu NCs solution is good, the probe solution can be stored for a long time, and the fluorescence lifetime is stable. The glutathione modified copper nanocluster solution has strong anti-interference capability, and the GSH-Cu NCs solution has the advantages of high detection speed, simple and convenient acetylene detection operation, low cost and no need of complex instruments, and is suitable for field use.

The invention discloses a detection method and a detection system for the cracking gas concentration of a transformer insulating material. The detection method comprises the following steps: performing headspace treatment on to-be-detected insulating oil to realize oil-gas separation in a sample; then the mixed gas is separated through a chromatographic column, the concentration of the dissolved gas is detected and analyzed through a mass spectrometry detector, and the cracking gas comprises at least one of methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide or carbon dioxide. The method specifically comprises the following steps: preparing a to-be-detected insulating oil sample, and treating the to-be-detected insulating oil sample by adopting headspace to realize oil-gas separation in the sample; separating the mixed gas by adopting a chromatographic column, and then detecting and analyzing the dissolved gas by adopting a mass spectrometry detector; preparing a standard gas for dissolving the gas, establishing a calibration curve, and quantitatively calculating the concentration of the cracking gas through the calibration curve. The method can accurately detect methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide and carbon dioxide gases, and has the characteristics of high detection sensitivity, good repeatability, simplicity and convenience and the like.

A method for separating VdF and acetylene, the method comprising: a step for mixing a first mixture containing VdF and acetylene with an extraction solvent, which is at least one compound selected from the group consisting of methanol, acetone, chloroform, and 1-chloro-2, 3, 3-trifluoro-1-propene, to obtain a mixture for extraction; and a step in which the mixture for extraction is distilled to obtain a distillate having VdF as the main component and a bottom product having an extraction solvent as the main component and further containing acetylene, respectively.

The utility model relates to gas purification technical field especially is a calcium carbide method acetylene gas purification device, including washing tower, circulating pump, cooler and collector, the one side lower extreme of washing tower is installed for the acetylene pipe of air inlet, the top of washing tower is installed for the first connecting pipe of air outlet, the other end of first connecting pipe is connected in the one side lower extreme of cooler, and the other side of cooler is installed for the heat exchange pipe of cooling use, the top of cooler is installed with second connecting pipe, and the other end of second connecting pipe is installed with collector, and the top of collector is installed with the air pipe, in the utility model, integrated acetylene gas purification process, after entering washing tower, acetylene gas is fully washed through the multistage shower nozzle structure of inside back type setting, can effectively remove the alkali liquor and small impurities of entrainment, improve gas quality, and the cooler of cooperation setting can further reduce gas temperature and moisture content, improve the stability of subsequent reaction.

The invention is directed to a process for the preparation of an aromatic acid or a phenolic compound, said process comprising reacting a dienophile and a furanic compound comprising an acetal moiety in a Diels-Alders reaction to obtain an aromatic compound comprising said acetal moiety, followed by hydrolysis and oxidation of said acetal moiety into a hydroxide or carboxylate moiety to form the aromatic acid or phenolic compound, wherein said dienophile is selected from the group consisting of alkylenes, acetylenes, acrylates, maleates, fumarates, maleimides, propiolates, acetylene dicarboxylates, and benzynes and wherein said acetal moiety is bound directly to the 2-position of the furanic compound.

The invention belongs to the technical field of cement kiln flue gas treatment, and particularly relates to a carbide slag cement denitration ammonia escape control and utilization system, and a modification method of the carbide slag cement denitration ammonia escape control and utilization system comprises the following steps: changing a drying crusher into an indirect dryer, indirectly exchanging heat between flue gas at an outlet of a preheater and carbide slag, and drying the flue gas at an outlet of the indirect dryer; a waste gas outlet of the indirect dryer is connected with an inlet of the ammonia gas absorption device, and an outlet of the ammonia gas absorption device is communicated with a drying medium outlet of the indirect dryer. The invention provides a carbide slag cement denitration ammonia escape control and utilization system.

This invention relates to the field of potting compound technology, and more particularly to a thermally conductive potting compound, its preparation method, and its application method. The invention provides a thermally conductive potting compound comprising component A and component B; component A, by weight, comprises: 24-28 parts of thermally conductive base adhesive; 0.7-1.0 parts of vinyl silicone oil; 0.05-0.15 parts of platinum catalyst; and 0.04-0.12 parts of colorant; component B, by weight, comprises: 24-28 parts of thermally conductive base adhesive; 0-0.4 parts of vinyl silicone oil; 0.8-0.9 parts of hydrogen-containing silicone oil; and 0.005-0.015 parts of inhibitor; the inhibitor includes ethynylcyclohexanol and / or methylbutynol. The thermally conductive potting compound provided by this invention has ultra-high thermal conductivity, low volatility and low viscosity, excellent mechanical properties, excellent electrical insulation properties, and superior storage stability, exhibiting no clumping or agglomeration after 6 months of storage.

The invention discloses a cone-ball coupled cavity photoacoustic gas sensor for detecting acetylene dissolved in transformer oil, relates to the field of testing or analyzing materials by using an optical means, and solves the problem that miniaturization and high sensitivity of an existing photoacoustic sensor are difficult to consider at the same time. An optical fiber collimator is arranged at one end of the shell, a sonic sensor is arranged at the other end of the shell, a buffer cavity, a first resonant cavity and a second resonant cavity are sequentially arranged in the shell between the optical fiber collimator and the sonic sensor, the end of the optical fiber collimator is located in the buffer cavity, and the center lines of the optical fiber collimator, the buffer cavity, the resonant cavities and the sonic sensor coincide. The buffer cavity is cylindrical, an air inlet and an air outlet are formed in the side wall of the buffer cavity, the first resonant cavity is in a circular truncated cone shape, and the second resonant cavity is in a segment shape. The buffer cavity, the first resonant cavity and the second resonant cavity are coupled to form a cylindrical-conical-spherical coupled cavity, so that limitation and focusing of acoustic energy are realized, and the amplitude of a photoacoustic signal is enhanced.

The application provides a high-pressure steam acetylene black granulation method and system, which comprises a soaking device, a cooling device and a granulation device. First, acetylene black and high-pressure steam are fed to be mixed and soaked; the soaked acetylene black is cooled to a first temperature; and the cooled acetylene black is granulated by feeding a granulation medium, and the temperature of the granulation medium is a second temperature; wherein the first temperature is 50-90 DEG C, and the second temperature is 50-90 DEG C. The acetylene black is mixed with the high-pressure steam, the high-pressure steam is soaked into the acetylene black after mixing, the soaked acetylene black is cooled to the first temperature, the cooled acetylene black is granulated by feeding the granulation medium, the temperature of the granulation medium is the second temperature, and experiments show that, by cooling the acetylene black soaked with the high-pressure steam to a temperature equal to or close to the temperature of the granulation medium, the oil absorption value of the granular acetylene black can be increased from 240 ml / L to 268 ml / L, and the use range of the acetylene black is expanded.

The application belongs to the technical field of fluorescent probe detection, and discloses a bimetallic nanocluster fluorescent probe compound and application thereof in preparation of a product for rapidly detecting acetylene. The fluorescent probe compound is a gold-copper bimetallic nanocluster solution modified by adamantane thiol, which is used as a fluorescent probe for acetylene detection. The solution has a clear and controllable preparation process. Through specific proportioning and reaction conditions of cuprous chloride, adamantane thiol, tetrachloroauric acid, sodium borohydride and other reagents, a probe solution with stable fluorescence characteristics can be prepared. The bimetallic nanocluster fluorescent probe compound is applied in preparation of a product for rapidly detecting acetylene. Through specific combination of fluorescent molecules and acetylene gas to trigger the secondary effect of fluorescence quenching, detection is realized, and other substances cannot trigger quenching. At a wavelength of 700 nm, the linear relationship (R 2 >0.99) between the fluorescence intensity and the acetylene concentration realizes accurate quantification of the acetylene concentration, and the minimum detection limit is 0.026 muL / L.

The application provides a kind of sodium sulfide nine hydrate and activated olefin / acetylene preparation polyether and its method, belong to sulfur-containing polymer technical field.The structural formula of polyether in the application, R 1 And R 2 Independently be substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl;The number of carbon atoms of the alkyl is 1-10, the number of carbon atoms of alkoxy is 1-10, the number of carbon atoms of aryl is 1-30, the number of carbon atoms of heteroaryl is 3-30;Substituted alkyl and substituted alkoxy independently are one or more;N is an integer of 2-4000.The application is used as sulfur source sodium sulfide nine hydrate, under the condition of no metal catalyst, polyether is synthesized by polymerization reaction;Reaction condition is mild, reaction is efficient, economic and environmental protection, meet the current green production concept and can avoid the use of dangerous reagent.

The utility model provides a novel liquid drainage device for a liquid separation tank, which belongs to the field of production of acetylene from natural gas and related chemical industry, and comprises a liquid separation tank, a tank bottom valve, a flushing water valve and an in-situ water pipe network, a through hole is formed in the center of the bottom of the liquid separation tank, and the tank bottom valve is mounted in the through hole and hermetically connected with the through hole; the drainage pipeline connected with the lower end of the tank bottom valve is connected with an in-situ water pipe network through a flushing pipeline; and a flushing water valve is arranged on the flushing pipeline. According to the device, the tank bottom valve is arranged at the bottom of the liquid separation tank, meanwhile, the flushing pipeline is additionally arranged to flush the liquid drainage pipeline, the flushing water valve is closed in the liquid drainage process, and the tank bottom valve is opened for liquid drainage; and after liquid drainage is completed, the tank bottom valve is closed, and the flushing water valve is opened, so that the polymer remained in the liquid drainage pipeline is flushed, continuous flushing of the liquid drainage pipeline is realized, blockage of the liquid drainage pipeline is avoided, and the operation cycle of the device is prolonged.

The invention relates to the field of activated carbon modification, in particular to high-hydrophobicity activated carbon and a preparation method thereof. According to the technical scheme, the method comprises the following steps: grinding a biomass material, adding a solution containing aluminum salt and / or magnesium salt, carrying out hydrothermal reaction to obtain a hydrothermal precursor, drying, carbonizing under the protection of inert gas to obtain a carbonized precursor, activating to obtain an activated precursor, and finally cleaning and drying to obtain the high-hydrophobicity activated carbon. Wherein in the activation step, water vapor is firstly introduced to carry out an activation reaction on the carbonized precursor, then plasma gas is circularly introduced to further react to obtain an activated precursor, and the plasma gas is acetylene and fluorinated benzene mixed plasma gas. The process is simple, complex equipment is not needed, the whole preparation process is short in period, low in cost and easy to industrialize, and the prepared activated carbon is high in hydrophobicity, good in oil absorbency and large in specific surface area.

The utility model discloses an explosion-proof hole cover plate with a furnace pressure detection function, which relates to the technical field of electric furnace or submerged arc furnace smelting systems and comprises a cover plate, a heat insulation sealing layer, a cooling pipeline and a furnace pressure detection device. The cover plate is rotatably arranged on the furnace cover, the heat insulation sealing layer is arranged at the bottom of the cover plate, the side face of the heat insulation sealing layer is conical and used for being matched with the anti-explosion hole to form conical sealing, and the cooling pipeline is arranged at the top of the cover plate and is densely arranged in an S shape; the furnace pressure detection device is installed on the top of the cover plate and comprises a buffer cylinder, a pressure taking pipe and a pressure guiding pipe, the end, away from the buffer cylinder, of the pressure taking pipe penetrates through the cover plate and the heat insulation sealing layer, and the end, away from the buffer cylinder, of the pressure guiding pipe is connected with a pressure detection instrument. According to the explosion-proof hole cover plate with the furnace pressure detection function, the service life of the cover plate is prolonged through the heat insulation effect of the heat insulation sealing layer and cooling of the cover plate by the cooling pipelines which are densely arranged in the S shape, the furnace pressure detection device is integrated on the top of the cover plate, the pressure in a furnace can be detected in real time, and use is convenient.

The application discloses a preparation method of a binary transition metal aluminide nanocatalyst and application thereof. First, a mixed metal salt solution is mixed with an ammonium carbonate solution to obtain a metal oxide precursor through co-precipitation. Then, the oxide precursor is mixed with a low-temperature composite molten salt and is subjected to thermal reduction under a specific atmosphere. Through simple post-processing, a single-phase binary transition metal aluminide nanocatalyst with high catalytic activity is obtained. The non-noble metal aluminide nanocatalyst prepared is applied to a reaction of catalytically selectively hydrogenating acetylenes to prepare olefin compounds. Under mild conditions, 99% conversion of reactants is achieved while maintaining 96% olefin selectivity. Compared with a traditional supported catalyst, the metal aluminum atom greatly regulates the electronic and geometric structures of the transition metal atom, effectively improves the catalytic activity, and significantly improves the structural stability of the catalyst. The material has high phase purity, is easy to separate and recycle, and has good application prospect.

The present application belongs to the technical field of acetylene preparation, and discloses a method and system for efficiently preparing acetylene and hydrogen from natural gas based on turbine cracking. The method comprises the following steps: obtaining 95%-100% purified methane gas through raw material pretreatment, preheating to 523-823 K, and then feeding into a turbine cracking reaction unit to be heated to 1800-2200 K within 1-10 ms and cracked for 1-10 ms; the cracked gas is quenched to below 800 K within 0.5-3 ms and the waste heat is recovered; finally, carbon black, high-purity acetylene and hydrogen are obtained through gas-solid and gas separation. The system comprises raw material pretreatment, preheating, turbine cracking reaction, quenching and waste heat recovery, gas-solid separation, gas separation units, and a matching monitoring and collaborative control module, and realizes multi-parameter collaborative control and online carbon cleaning. The present application does not introduce oxygen, the conversion rate of natural gas is 92%-95%, the acetylene yield is 83%-87.5%, the energy consumption is low, the products are easy to separate, it is green and environmentally friendly, and it is suitable for industrial continuous production.

The invention discloses a Ni-K modified supported catalyst, preparation thereof and application of the Ni-K modified supported catalyst in acetylene semi-hydrogenation reaction. The preparation method of the catalyst comprises the following steps: 1, completely dissolving an active metal salt, a nickel salt and a potassium compound in a solvent to obtain a uniform mixed solution; 2, fully loading the active metal salt, the nickel salt and the potassium compound in the mixed solution onto the carrier through wet impregnation, and then drying and grinding to obtain precursor powder; 3, calcining the precursor powder in an inert or air atmosphere at 300-600 DEG C to obtain a calcined product; and 4, carrying out reduction activation on the calcined product in a reducing atmosphere at 350-450 DEG C to obtain the Ni-K modified supported catalyst. The invention provides the application of the Ni-K modified supported catalyst in acetylene semi-hydrogenation reaction, and the Ni-K modified supported catalyst has high acetylene conversion rate, high ethylene selectivity and good stability.

The invention relates to a multi-stage hot rolling process of a Cu-Zn-Ni alloy double solid wrench for an acetylene environment, and relates to the technical field of copper alloy manufacturing, a Cu-Zn-Ni alloy is cast into a blank, then the casting blank is subjected to multi-stage hot rolling to manufacture the double solid wrench, the multi-stage hot rolling is divided into rough rolling, intermediate rolling and finish rolling, the rolling temperature of rough rolling is 920-940 DEG C, the single-pass reduction is 15-20%, the deformation is 30-40%, and the rolling temperature is 920-940 DEG C; the rolling temperature is not less than 850 DEG C; the initial rolling temperature of the intermediate rolling is 920-940 DEG C, the deformation is 10-15%, and the final rolling temperature is 780-820 DEG C; the rolling temperature of the finish rolling is greater than or equal to 880 DEG C, and the deformation is less than or equal to 10%. The Cu-Zn-Ni alloy double solid wrench prepared by the production method disclosed by the invention meets the working requirements in an acetylene environment.

The application relates to the technical field of organic silicon synthesis, and particularly discloses a high-selectivity platinum catalyst and a vinyl double-seal head synthesis method. The high-selectivity platinum catalyst comprises a carrier and a platinum active component loaded on the carrier, the platinum active component is obtained by reducing and activating a platinum precursor and a ligand under a hydrogen atmosphere at 250-350 DEG C after coordination modification, and the molar ratio of the ligand to the platinum element in the platinum precursor is 2-3:1. In the application, the platinum active component is obtained by reducing and activating the platinum precursor and the ligand after coordination modification, and the ligand and the platinum element form a specific coordination structure of the platinum active center, guide the direct silicon-hydrogen addition reaction of acetylene and a hydrogen-containing double-seal head, thus the dimethyl chlorosilane intermediate is not needed, the process flow is simplified, and the effects of improving the reaction yield, environmental protection and process economy are achieved.

Provided are: a production method for a triazole skeleton–containing polymer having a desired substituent; and a triazole skeleton–containing polymer. The present invention provides a production method for a triazole skeleton–containing polymer, the production method comprising a step for reacting an acetylene group contained in a starting material polymer with an azido group–containing compound to obtain the triazole skeleton–containing polymer, wherein the starting material polymer is a polymer containing a first monomer unit 1A derived from a monomer having an acetylene group and a second monomer unit derived from a second monomer, and the triazole skeleton–containing polymer has a triazole skeleton–containing monomer unit and the second monomer unit.

The invention discloses a pure silica zeolite DD3R hydrogenation catalyst as well as a preparation method and application thereof. The pure silica zeolite DD3R hydrogenation catalyst takes a DD3R molecular sieve as a carrier, and a Cu element and a Pd element are loaded on the carrier; in the pure silica zeolite DD3R hydrogenation catalyst, the mass ratio of the Pd element is 0.2 wt%-0.6 wt%, and the mass ratio of the Cu element is 0.2 wt%-0.7 wt%. The preparation method comprises the following steps: adding the structure-directing agent, the silicon source and the mineralizing agent into deionized water, and uniformly mixing; adding a palladium source and a copper source, then adding a seed crystal, and crystallizing for a certain time; and carrying out suction filtration, washing, drying, roasting and the like on the obtained sample to prepare the pure silica zeolite DD3R hydrogenation catalyst. The catalyst prepared by the invention is used for a reaction for removing trace acetylene in ethylene through thermocatalytic hydrogenation, has high specific surface area, high catalytic activity, high selectivity and high thermal stability, and can still keep relatively high catalytic activity at a high space velocity.

The utility model relates to the technical field of welding mechanisms, in particular to an acetylene propane bottle end socket welding mechanism which comprises a bottom plate, a connecting column vertically and rotatably penetrates through the middle of the bottom plate, the lower end of the connecting column is connected with a rotation control mechanism, and a lower disc is transversely and fixedly installed at the upper end of the connecting column. A transversely-arranged workbench is fixedly installed on the lower disc through a plurality of supporting columns, a plurality of open grooves penetrating through the workbench are formed in the upper end face of the workbench at equal intervals, a support is fixedly installed on the upper end face of the lower disc, a clamping gear is rotatably installed on the upper portion of the support, and a clamping rod is fixedly installed on the upper portion of the clamping gear. The clamping rod movably penetrates through the open groove, the clamping gear is connected with a clamping control mechanism, an installation frame is fixedly installed on the upper end face of the bottom plate, and a welding device is installed on the installation frame through a lifting control mechanism.

The invention relates to the field of medicinal chemistry, in particular to an acetylene hydroxamic acid compound containing a hydrazone structure as well as a preparation method and application of the acetylene hydroxamic acid compound. The compound is a compound represented by a general formula I, and a stereoisomer, a pharmaceutically acceptable salt, a solvate or a prodrug thereof, wherein substituent groups R1, R2, R3, R4, X and Y have meanings given in the specification. The invention also relates to application of the compounds and pharmaceutically acceptable salts, solvates or prodrugs thereof as antibacterial drugs in treatment, in particular to application in treatment of gram-negative bacterial infection.

This application relates to the field of organic synthesis technology, specifically disclosing a process for preparing tert-butyl vinyl ether. The raw materials include solid tert-butanol, acetylene, tetrahydrofuran solvent, and potassium hydroxide catalyst, supplemented with auxiliary materials such as type 3A molecular sieves and activated alumina adsorbents. The preparation method involves: after dehydration and purification of the raw materials, the materials are introduced into a reaction vessel; temperature and pressure are controlled, and the reaction endpoint is monitored using an infrared spectrometer; byproducts are quenched and acetylene is recovered; the process involves multi-stage condensation, water washing to remove impurities, distillation separation, and solvent purification and recycling, with simultaneous integration of waste heat recovery and continuous material feeding. The tert-butyl vinyl ether prepared by this process, as an important fine chemical intermediate, can be used in coatings, adhesives, and polymer material modification, possessing advantages such as high purity and good stability. The preparation method achieves efficient utilization of materials and energy through multi-stage synergistic linkage, combining the advantages of green environmental protection, continuous and stable operation, and high resource utilization.

The invention relates to the technical field of chemical separation, in particular to a three-dimensional flexible metal organic framework material and a preparation method and application thereof. The structural general formula of the metal organic framework material is A (TIB) 2, A is a transition metal cation, and TIB is 1, 3, 5-tri (1H-imidazole-1-yl) benzene. Transition metal cations and TIB are self-assembled in an octahedral hexa-coordination mode to form a two-dimensional layered frame, and the two-dimensional layered frame is further stacked to form a three-dimensional flexible structure. The material has a two-dimensional layered skeleton with high stability and a pore surface with a partial electrostatic potential, not only shows a strong capture capability on carbon dioxide, but also provides a suitable storage space for acetylene, can selectively adsorb and separate an acetylene / carbon dioxide / ethylene mixed system, and realizes one-step purification of ethylene from a ternary mixture. In addition, due to excellent cyclic regeneration performance, solvent stability and thermal stability, the adsorbent is expected to be an efficient adsorbent applied to industrial adsorption separation.

The present application relates to the technical field of supported metal nanoparticle catalysts, in particular to a supported nickel-based carbide acetylene selective hydrogenation catalyst, a preparation method and application thereof. The catalyst is formed by supporting a bimetallic carbide active component on a nanometer gallium oxide carrier, the bimetallic carbide is Ni3GaC 0.7 , and the loading amount of Ni in the catalyst is 1-40 wt.%. A nickel salt is loaded on a nanometer gallium oxide material by an impregnation method, then a NiO / Ga2O3 catalyst is obtained by calcining in air; then the catalyst is treated by heating in a mixed gas of carbon dioxide and hydrogen, and a supported Ni3GaC 0.7 / Ga2O3 catalyst is obtained. The acetylene selective hydrogenation reaction performance test results show that the Ni3GaC 0.7 / Ga2O3 catalyst exhibits excellent selectivity (about 85%) in the hydrogenation reaction, and long-term performance test also shows that the supported catalyst has good stability.