35 results about "Propyne" patented technology

The invention discloses a gram-level synthesis method of Dactyllactone A. The gram-level synthesis method of Dactyllactone A is shown in the description. The method comprises the following steps: with simple and easily available aryl iodide, aziridine and triisopropyl silylacetylene as starting materials, stirring and reacting in an organic solvent at 60-70 DEG C under the action of a palladium catalyst, a phosphine ligand, a norbornene derivative and alkali to obtain a key intermediate; the key intermediate is condensed with iodo gem-dimethyl ester furanone prepared from propiolic acid and dimethyl malonate iodine ylide, and then the condensation product is subjected to an Au / Ag catalyzed intramolecular hydroamination reaction, photocatalytic 6-pi electro-cyclization and two-step conversion, so that the natural product Dactyllactone A can be obtained, wherein the iodo gem-dimethyl ester furanone and iodo gem-dimethyl ester furanone are prepared from propiolic acid and dimethyl malonate iodine ylide. The method has the advantages of cheap and easily available raw materials, short reaction steps, high reaction efficiency, large preparation scale, simple preparation process and the like, has great application potential, and lays a good foundation for industrial production.

Disclosed are a cationic radical-type triazine-based polyacetylene, a preparation method thereof, and photocatalytic applications. The chemical structure is shown in Formula 3. The preparation method comprises the following steps: using 2,4,6-tris(4-pyridyl)-1,3,5-triazine shown in Formula 1 and propargyl bromide shown in Formula 2 as raw materials, without a catalyst or initiator, to directly prepare the cationic radical-type triazine-based polyacetylene Tz-IRPA-1 shown in Formula 3 in one step through a quaternization-induced in-situ polymerization reaction. The functional polymer prepared by the present invention has a simple process, requiring only a one-step reaction to in-situ prepare the non-metallic polymer catalyst Tz-IRPA-1. The prepared Tz-IRPA-1 is used in a photocatalytic cycloaddition reaction of an epoxy compound and CO2, exhibiting excellent heterogeneous photocatalytic activity under normal temperature and pressure conditions.

The present invention discloses a method for synthesizing substituted pyrrole compounds. The specific steps are as follows: under inert gas protection, an aryl-1-propyne compound, a nitrile compound, and a base are mixed in a molar ratio of 1:1.2:3 in an aprotic solvent for reaction, quenched by adding a saturated aqueous ammonium chloride solution, filtered, washed, evaporated to dryness under reduced pressure, and separated by column chromatography to obtain the substituted pyrrole compound. The present invention reacts under metal-free conditions, has readily available raw materials, has good substrate universality, and is simple to prepare and operate.

The invention discloses a multilayer polycyclic aromatic hydrocarbon organic membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: cleaning and drying a polyacrylonitrile substrate; dropwise adding a poly [1-(trimethylsilyl)-1-propyne] solution on the polyacrylonitrile substrate, and carrying out spin coating to form a uniform supporting layer; the preparation method comprises the following steps: preparing pre-prepared hexa (tripyridine) hexaphenylbenzene polycyclic aromatic hydrocarbon into a hexa (tripyridine) hexaphenylbenzene polycyclic aromatic hydrocarbon monomolecular layer compressed film by adopting a Langeron film preparation instrument, and transferring the monomolecular layer compressed film to the surface of a polyacrylonitrile substrate spin-coated with a poly [1-(trimethylsilyl)-1-propyne] layer; the multi-layer polycyclic aromatic hydrocarbon organic membrane is obtained by repeating the monomolecular layer compression and horizontal contact transfer process, the efficient size exclusion effect is achieved, and the method has the advantages of high permeability, high selectivity, rapidness and low-cost preparation.

The invention belongs to the technical field of petroleum and natural gas yield increase, and particularly relates to a preparation method of an anti-shearing polymer fracturing fluid. The preparation method comprises the following steps: preparing a monomer with high strength and shear fracturing resistance from methyl propiolate, aluminum chloride, cyclooctene and other raw materials, adding the monomer into N-vinyl pyrrolidone, 2-acrylamido-2-methylpropanesulfonic acid and acrylamide to prepare a polymer, and mechanically stirring at a high speed to obtain the polymer. And completely dissolving the reaction monomer. And adding an initiator to initiate the monomers to polymerize under the irradiation of an ultraviolet lamp, and reacting at a constant temperature to obtain a product. The synthesis method disclosed by the invention has the characteristics of low cost, high yield and simple preparation process, no by-product is generated, and the obtained product has good anti-shearing performance and has a relatively good application prospect in oil field fracturing and recovery efficiency improvement.

The invention discloses a synthesis method of furatadone, which comprises the following steps: by taking 1-(4-morpholinyl)-2-propyne as a raw material, carrying out [3 + 2] cycloaddition reaction on the 1-(4-morpholinyl)-2-propyne and di-tert-butyl azodicarboxylate to obtain a 3, 5-disubstituted oxazolone intermediate; then under the action of a Pd / C catalyst, carrying out a hydrogenation reaction of olefin to obtain N-Boc protected AMOZ; finally, the AMOZ protected by N-Boc and 5-nitrofurfural are subjected to a condensation reaction under the action of hydrogen chloride, and the product furaltadone is obtained. The synthesis method is simple, environmentally friendly and suitable for large-scale production.

A method for removing acetylene from ethane cracking to olefins involves selectively hydrogenating a mixture of C2 and C3 hydrocarbons from ethane cracking to remove acetylene, propyne, and propadiene. Reaction conditions: inlet temperature 50℃~95℃, pressure 1.5~3.0MPa, space velocity 8000~14000h⁻¹ ‑1 The catalyst support is alumina or mainly alumina, and has a bimodal pore distribution structure with a micropore size of 40–70 nm and a macropore size of 200–500 nm. The specific surface area of ​​the catalyst support is 4–15 m². 2 / g. The catalyst contains at least Pd, Fe, Ni, and Cu, with Pd supported in both microemulsion and solution formats, Ni and Cu supported in microemulsion, and Fe supported in solution. The solution-supported Pd and Fe are mainly loaded in micropores of 40–70 nm, while the microemulsion-supported Ni, Cu, and Pd are mainly distributed in macropores of 200–500 nm. This alkyne removal method exhibits low reduction temperature, low "green oil" formation, and excellent catalytic performance and anti-coking properties.

The application relates to a kind of 2H-chromene phenyl ketone derivatives of double halogen substitution and preparation method and application thereof, belong to the technical field of organic room temperature phosphor material technology.The preparation method of derivative of the application comprises the following steps: (1) under inert gas protection, with halogenated salicylaldehyde and 1-(3-bromine prop-1-alkyne-1-yl) halogenated benzene as raw material, potassium carbonate as base, acetonitrile as solvent, reflux reaction is carried out, the reaction solution is extracted, dried, column chromatography separation, and intermediate 1 is obtained; (2) under inert gas protection, intermediate 1 is dissolved in dichloromethane, boron trifluoride ether is added, and stirring reaction is carried out, and the reaction solution is extracted, dried, column chromatography separation, and the application is obtained.The synthesis route of derivative of the application is simple, high in yield, easy to purify, and the prepared room temperature phosphor material can be widely applied in the field of organic light emitting diode, information encryption, biological imaging and optical sensing.

This utility model relates to the field of pesticide production technology, specifically to a device for preparing a compound suspension of propyzamide and metolachlor, comprising a mixing tank, a sealing cover fixedly connected to the upper end of the mixing tank, and a stirring assembly provided on the surface of the sealing cover. The stirring assembly includes a servo motor, a first bevel gear, a stirring frame, a connecting shaft, a second bevel gear, a first stirring blade, a stirring shaft, a third bevel gear, and a second stirring blade. A device housing is fixedly connected to the upper surface of the sealing cover, and a feed chute is provided on the left side of the device housing. Viewing windows are provided on both the front and rear sides of the sealing cover. Through the cooperation of the servo motor, the first bevel gear, the second bevel gear, the third bevel gear, the stirring frame, and the stirring shaft, the first and second stirring blades are driven to rotate in opposite directions, preventing the pesticide solution from rotating in the same direction, facilitating rapid dispersion of the internal suspension, and effectively improving the mixing efficiency and mixing effect of the pesticide solution.

This application provides a method for flotation separation of chalcopyrite and pyrite, relating to the field of mineral flotation. The method involves mixing and flotation of the minerals to be processed, including chalcopyrite and pyrite, with a chalcopyrite collector to obtain chalcopyrite concentrate and pyrite tailings. The general structural formula of the chalcopyrite collector is: [Formula omitted]. This chalcopyrite collector utilizes the high selective affinity of its propyne ester group for copper-active sites on the chalcopyrite surface and its inertness to iron sites on the pyrite surface, achieving precise identification and collection of chalcopyrite from the molecular structure of the reagent, significantly improving the grade and recovery rate of the copper concentrate. The R group is a hydrophobic group facing the pulp, significantly enhancing the surface hydrophobicity of the chalcopyrite particles, thereby enabling them to adhere to flotation bubbles and float.

The application relates to a preparation method of a novel microporous copper-based metal organic framework material (Cu-MOF) and gas separation application thereof. Cu metal centers are all in a four-coordination mode, each independent Cu atom is coordinated with one oxygen atom on a BODC ligand, carboxyl O atoms on the BODC ligand all participate in coordination, and a propeller binuclear coordination geometry of the Cu-MOF is formed; wherein each BODC ligand acts as a four-connected node and is connected with four crystallographically independent Cu centers, and the carboxyl on the BODC ligand is connected and supported, and the bridge ring in the middle section contains rich methylene groups, and the rich H atoms can all act as potential action sites. The regularly arranged BODC ligands in the Cu-MOF channel provide hydrogen bond acceptors, which are favorable for strengthening the action force between low-carbon hydrocarbon gas molecules and the framework, so that the effects of preferentially adsorbing acetylene, ethane, propylene, propyne and sulfur hexafluoride gas in acetylene / carbon dioxide, ethane / ethylene, propylene / ethylene, propyne / propylene, sulfur hexafluoride / nitrogen and other mixed gases are realized.

To provide an azeotropic mixture and a method for reducing 2333 - trifluoropropyne (TFPY) which is an impurity in the production of 333 - tetrafluoropropene (HFO - 1234yf).SOLUTION: A heterogeneous azeotrope or azeotrope-like composition comprising TFPY and hydrogen fluoride (HF), wherein the composition may comprise from about 71. 5wt.% to about 98. 8wt.% TFPY and from about 1. 2wt.% to about 28. 5wt.% hydrogen fluoride, and wherein the composition has a boiling point from about - 10.0 °C. to about 25.0 °C. at a pressure from about 61psia to about 171psia. This azeotrope or azeotrope-like composition can be used to separate TFPY as an impurity from 2-chloro - 333 - trifluoropropene (1233xf), 2-chloro - 1112 - tetrafluoropropane (HCFC - 244bb), or HFO - 1234yf compositions.SELECTED DRAWING: Figure 1

The invention discloses a process for preparing 3-chloropropyne through concerted catalysis of phosphine ligand-transition metal in the technical field of organic synthesis. The process realizes efficient synthesis through specific steps: firstly, mixing a porous nitrogen-doped carbon-loaded phosphine ligand-metal nano composite material, palladium chloride and triethylamine under the protection of nitrogen to form a catalytic system; dissolving propargyl alcohol and N-chlorosuccinimide in anhydrous tetrahydrofuran, and mixing in an ice bath to obtain a pre-reaction mixture; then adding the pre-reaction mixture into a catalytic system, stirring and reacting at a specific temperature under the protection of nitrogen, and monitoring the progress through thin layer chromatography in the reaction; and after the reaction is finished, filtering and separating the catalyst, evaporating filtrate under reduced pressure to remove the solvent, and purifying by column chromatography to obtain a target product. The process is high in catalytic efficiency, good in selectivity, high in product yield and environment-friendly.

The present invention provides a composition comprising a refrigerant (mixed refrigerant) having three types of performance, i.e., a coefficient of performance (COP) and refrigerating capacity (Cap) that are equivalent to or higher than those of R410A, and a sufficiently low GWP. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising CF3I, CO2 (R744), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)—HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).

The utility model discloses a gas purification device for preparation based on propynyl, which comprises a purification box, a purification structure, a feeding pipe, a feeding valve, an exhaust pipe, an exhaust valve and a spraying box, and relates to the technical field of gas purification, the gas purification device integrates multiple innovative designs and shows obvious advantages; firstly, according to the unique purification structure, through the principle of a stirring driver and a magnetic transmission, automatic rotation of a rotating circular ring, an inserting and sleeving shaft pipe and a cobweb exhaust pipe is achieved, and through the design, the contact area of gas and a purification assembly is increased, and the purification efficiency is greatly improved; meanwhile, due to the ingenious installation of the trumpet-shaped gathering piece, the gas can be gathered and guided to the purification assembly, the one-way Tesla valve effect is further formed, one-way drainage of the gas is ensured, and the purification effect is further improved.

The application discloses a method for separating propyne and propadiene, which comprises the following steps: contacting mixed gas containing propyne and propadiene with a metal organic framework material having special window active sites, and selectively adsorbing propyne in the mixed gas by the metal organic framework material, so as to realize the separation of propadiene and propyne; the metal organic framework material is formed by coordinating a six-coordinated divalent metal cation Cu 2+ with a tridentate nitrogen-containing ligand L to form a cage structure, and then bridging a high-coordination-number divalent inorganic anion ZrF6 2‑ to form a structure having special window active sites; the molecular formula of the metal organic framework material is (CuZrF6)3L4, wherein the tridentate nitrogen-containing ligand L is tris(4-pyridyl)amine. The method can separate propyne and propadiene mixed gas with high capacity and high selectivity, the adsorbent is easy to regenerate, and the hydrothermal stability is good.

The application discloses a heat transfer composition for a heat pump air conditioner, which comprises: a first component, wherein the first component is trifluoroiodomethane, and the mass content is 1-40%; a second component, wherein the second component is 3,3,3-trifluoropropynyl, and the mass content is 1-60%; a third component, wherein the third component is selected from difluoromethane and / or cis-1,2-difluoroethylene, and the mass content is 1-25%; and a fourth component, wherein the fourth component is selected from at least one of trifluoroethylene, propane or hexafluoropropylene, and the mass content is 1-60%; and the total mass content of the first component, the second component, the third component and the fourth component is 100%. The heat transfer composition has excellent refrigeration performance and heating performance, especially outstanding heating performance in a low-temperature environment, and is suitable for being used as a heat transfer medium of a new energy automobile heat pump air conditioner system.

The invention discloses a preparation method of 3, 3, 3-trifluoro-1-propyne, and the preparation method comprises the following steps: S1, in the presence of a solvent, reacting 3, 3, 3-trifluoro-1, 1-dichloro-1-propylene or 3, 3, 3-trifluoro-1, 1-dibromo-1-propylene with a strong base to prepare a 3, 3, 3-trifluoro-1-propyne strong base salt; s2, enabling the 3, 3, 3-trifluoro-1-propyne strong alkali salt to react with water, so as to prepare the 3, 3, 3-trifluoro-1-propyne. The preparation method of the 3, 3, 3-trifluoro-1-propyne, disclosed by the invention, has the advantages of easily available raw materials, simple process, no need of using a catalyst, recyclable solvent, small amount of three wastes, high product yield and suitability for industrial application.

The application relates to an acetylenyl-modified acyl covalent organic framework (COF) material and its application, and relates to the preparation of a crystalline porous material and a fuel cell. The material is a covalent organic framework material synthesized by a solvothermal reaction under specific conditions with 1,3,5-triformylphloroglucinol and 2,5-bis(2-propynoxy)terephthalic dihydrazide as raw materials, and has high crystallinity. The material has good proton conductivity, and the highest proton conductivity can reach 6.16163*10 ‑4 S / cm. The mechanical performance is also enhanced due to the introduction of the acetylenyl group. The acetylenyl group is a kind of active functional group, can be derived into various chemical reactions, and greatly improves the potential application value of the material.

The invention relates to the production of dimethylphenol, in particular 2, 5-dimethylphenol, and trimethylphenol, in particular 2, 3, 6-trimethylphenol, respectively, from 2, 5-dimethylfuran and acetylene and propyne, in particular in the presence of a platinum catalyst, in particular in MAF gas. The present invention provides sustainable synthesis of [beta]-tocopherol and [alpha]-tocopherol.

The utility model relates to the technical field of chemical engineering, in particular to a collecting tank for propyne production, which is good in sealing effect and comprises a middle round seat, a first through hole is arranged on the inner bottom wall surface of the middle round seat, a connecting pipe is arranged on the side wall of the middle round seat, a second through hole is arranged on the inner top wall surface of the middle round seat, and an upper round seat is arranged on the top end wall of the middle round seat. A motor is arranged on the top end wall of the upper round seat, a plurality of sliding grooves are formed in the inner bottom wall face of the upper round seat, a lead screw is rotationally connected to the inner top wall of the upper round seat through a bearing, the top end of the lead screw is fixedly connected with the output end of the motor through a coupler, and a connecting plate is in threaded connection with the outer wall of the lead screw. A first spring is arranged on the bottom end wall of the connecting plate, and a first spring seat is arranged on the bottom end wall of the first spring. According to the utility model, through a good sealing effect, the condition of propyne gas leakage is greatly reduced, so that the risk of explosion and fire accidents is remarkably reduced, and the safety of production equipment and the life safety of workers on a production site are powerfully guaranteed.

The invention belongs to the technical field of novel gas adsorption and separation materials, and particularly relates to a metal organic framework material for removing multi-component alkyne from an ethylene mixture as well as a preparation method and application of the metal organic framework material. The metal organic framework material takes a transition metal ion as a construction center, and is constructed by a polyazole organic ligand and an inorganic oxyacid radical; a polyazole organic ligand is used as a main connecting unit and is coordinated with transition metal ions through nitrogen-containing sites to form a basic framework of a network structure; inorganic oxyacid radicals are used as auxiliary connection units, are further coordinated with transition metal ions through oxygen sites, and participate in coordination network construction of the transition metal ions and the polyazole organic ligands. The metal organic framework material provided by the invention can efficiently and selectively adsorb multi-component alkyne such as 1-butyne, propyne, acetylene and the like at the same time, and completely excludes ethylene molecules, so that a high-purity ethylene product is prepared from an ethylene mixture containing the multi-component alkyne in one step.

The invention discloses a synthesis method of propargyl alcohol, calcium carbide, formaldehyde and / or polyformaldehyde and water react in an organic solvent in the presence of a catalyst and basic carbonate to obtain propargyl alcohol, the catalyst comprises a quaternary ammonium salt catalyst and / or a cesium carbonate catalyst, and the organic solvent comprises dimethyl sulfoxide. Compared with a traditional synthesis method, the propargyl alcohol synthesis method has the advantages that the catalyst is easier to obtain and lower in price, the requirement on equipment is lower, the operation is simpler and more convenient, and propargyl alcohol can be prepared with lower cost and higher efficiency. In addition, the propargyl alcohol synthesis method is safe in reaction and free of escape of a large amount of gas, and a closed reaction container does not need to be specially used. The propargyl alcohol synthesis method is more suitable for industrial production of propargyl alcohol and has higher economic benefits.

The invention relates to the technical field of compound preparation, in particular to a preparation method of 2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: carrying out Markov addition synthesis reaction on 3, 3, 3-trifluoro-1-propyne and a fluorinating reagent to obtain 2, 3, 3, 3-tetrafluoropropene; the fluorination reagent is prepared from pyridinium tetrafluoroborate; the structural formula of the pyridinium tetrafluoroborate is shown as a formula I, R1, R2, R3, R4 and R5 are independently selected from hydrogen and halogens, and at least two of R1, R2, R3, R4 and R5 are selected from halogens. The invention develops a new route for preparing 2, 3, 3, 3-tetrafluoropropene, and the preparation method has the advantages of mild reaction conditions, low product separation difficulty and high production safety, and can optimize the conversion rate of the reaction raw material 3, 3, 3-trifluoro-1-propyne and the selectivity of the product 2, 3, 3, 3-tetrafluoropropene at the same time.

This application relates to a method for reducing 3,3,3-trifluoropropyne in 2,3,3,3-tetrafluoropropylene. The invention relates to a method for reducing the concentration of fluorinated alkyne impurities, such as 3,3,3-trifluoropropyne (TFPY), in 2,3,3,3-tetrafluoropropylene (HFO-1234yf), comprising contacting such a mixture with a caustic material, such as sodium hydroxide (NaOH), under conditions that effectively reduce the concentration of fluorinated alkyne impurities, and in some practices including reducing the concentration by at least about 50%.

A method for synthesizing propynol under low pressure in acetylene atmosphere and a catalyst thereof, which uses 35%-40% formaldehyde aqueous solution as a starting material, uses a supported copper oxide-chromium oxide (CuO-Cr2O3) as a catalyst, and makes the formaldehyde aqueous solution flow through the surface of the catalyst carrier in a way of flowing through but not accumulating in a vertical pipe type reactor filled with acetylene gas atmosphere under a pressure lower than 0.05 MPa, and makes the formaldehyde aqueous solution react with acetylene to generate propynol. After the reaction, the material aqueous solution is separated by rectification to collect the product, and the yield of propynol in the product can reach 83%-92%. The Cu / Cr in the copper oxide-chromium oxide (CuO-Cr2O3) catalyst is 9 / 1-7 / 3 (mass ratio).

The application belongs to the field of fine chemical industry, and particularly relates to a method for rapidly preparing propargyl alcohol by using a fluidized bed reactor. 1,4-butynediol is used as raw material to produce propargyl alcohol and formaldehyde through a catalytic cracking reaction in a fluidized bed reactor under the action of a catalyst. After being separated and purified, the product is propargyl alcohol. The deactivated catalyst is regenerated in a catalyst regenerator and then recycled. The cracking reaction process is safe, dangerous gas acetylene is not used, the one-way conversion rate of 1,4-butynediol is greater than or equal to 65%, and the main reaction selectivity in the product is greater than or equal to 85%.

This invention discloses a method for preparing vinylcyclopropane nucleoside analogs. The method includes: sequentially adding a vinyl nucleobase derivative and a propynyl thioacetal compound to a mixture of a gold-nitrogen heterocyclic carbene catalyst and a silver salt under inert gas protection. After reaction, a highly stereospecific and selective disulfide vinylcyclopropane nucleoside analog is obtained, followed by hydrodesulfurization to yield the vinylcyclopropane nucleoside analog. This invention provides a concise new route for the synthesis of vinylcyclopropane nucleoside analogs, with mild reaction conditions, overcoming the potential explosiveness of traditional methods. The starting materials are readily available, and the product can be converted into various other useful potentially bioactive molecules, demonstrating strong practicality.

The invention discloses a flexible metal organic framework material with an interpenetrating structure as well as a preparation method and application thereof, and the preparation method of the metal organic framework material comprises the following steps: dissolving Zn salt, H2BDC and [4, 4-dipyridyl]-3-amine in an organic solvent, adding an HCl solution, transferring into a reactor, and reacting for 2-4 hours; sealing the reactor, transferring the reactor into a drying oven, heating and reacting at 80-120 DEG C for 18-48 hours, cooling to room temperature to obtain yellow crystal powder, and treating to obtain a product, namely the preparation. The framework material disclosed by the invention is applied to adsorption separation of C3H4 / C2H6 / C2H6 mixed gas. The framework material disclosed by the invention can be used for separating mixed gas of propane, propylene and propyne according to the difference of opening pressure of C3H4 / C2H6 / C2H6, is extremely high in separation selectivity, relatively large in adsorption capacity and excellent in separation performance, and is a relatively excellent solid physical adsorbent with various characteristics.