124 results about "Methyl iodide" patented technology

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention relates to the technical field of preparation of small molecule compound medicines, in particular to a preparation method of (S)-flurbiprofen. The method comprises the following steps: dropwise adding a tetrahydrofuran solution of 4-bromo-2-fluorobiphenyl into a mixture of tetrahydrofuran and magnesium, and reacting to generate a Grignard reagent; mixing tetrahydrofuran, (S)-vinyl chloride oxide and ferric acetylacetonate, dropwise adding the Grignard reagent, performing acidolysis ring opening, and performing methylation with methyl iodide and magnesium iodide to obtain an alpha-hydroxyl aromatic carboxylic acid derivative; and reacting with sodium chlorite, nitroxide free radicals and acetonitrile, and oxidizing to obtain the (S)-flurbiprofen. By introducing a chiral induction unit, effective transmission of chiral information is realized in a coupling stage, an original chiral center is not destroyed in a subsequent reaction, and a product is ensured to have a highly consistent configuration. According to the scheme, the technical problem that a method capable of remarkably improving the optical purity and yield of (S)-flurbiprofen is lacked in the prior art can be solved, and the method has good environmental friendliness and industrial application prospects.

The invention discloses an adsorption material for high-humidity and high-temperature iodine-containing aerosol and a preparation method thereof.According to the prepared adsorption material, polymers such as melamino-formaldehyde resin serve as a three-dimensional porous framework, and the adsorption material is prepared through a mild one-step solution processing method; an ionic polyimine network based on a lysine salt ionic liquid and carbonyl-rich polyvinylpyrrolidone are compounded on a skeleton in situ to form a porous adsorbent, and the porous adsorbent realizes efficient capture of elemental iodine (I2), methyl iodide (CH3I) and iodine aerosol through a synergistic mechanism of electrostatic induced adsorption and in-situ packaging and curing, so that the adsorption efficiency is improved, and the adsorption efficiency is improved. Under the harsh industrial conditions that the temperature is 100 DEG C or above and the relative humidity is 90% or above, the dynamic adsorption capacity to iodine reaches up to 160.7 wt%, the filtering efficiency is kept 99.8% or above, meanwhile, excellent iodine retention stability, recoverability and large-scale preparation potential are achieved, and an efficient, low-cost and practical solution is provided for treatment of radioactive iodine in nuclear waste gas.

The present application relates to a kind of preparation method of trifluoromethyl pyrazole compound, belong to the technical field of organic synthesis.The specific method is: (1) trifluoroacetyl ethyl acetate is first with hydrazine hydrate cyclization reaction and generates compound of formula III;(2) under the catalysis of base, compound of formula III is reacted with difluoromethylation reagent and generates compound of formula II;(3) compound of formula II is reacted with methylating agent and obtains compound of formula I;The difluoromethylation reagent is difluoro-monochloromethane or sodium difluoro-monochloroacetate;The methylating agent is chloromethane, bromomethane, iodomethane, dimethyl sulfate or dimethyl carbonate.The present application is prepared by changing reaction route, and the higher-priced raw material methylhydrazine is replaced, and isomer impurity is no longer generated in the product prepared.Not only raw material cost is reduced, but also the purity of product is improved.

The invention belongs to the field of chemical reagent moisture detection, and particularly relates to a coulometry Karl Fischer reagent for aldehyde ketone moisture detection and a preparation method of the coulometry Karl Fischer reagent. The coulometry Karl Fischer reagent for aldehyde ketone moisture detection is prepared from the following components in parts by weight: 1 to 15 percent of imidazole, 1 to 15 percent of 2-methylimidazole, 25 to 70 percent of ethylene glycol monomethyl ether, 5 to 30 percent of trichloromethane, 2 to 30 percent of trifluoroethanol, 2 to 10 percent of sulfur dioxide, 1 to 10 percent of methyl iodide, 0.1 to 5 percent of tetrabutylammonium iodide and 0.1 to 5 percent of iodine. The method does not contain hydroxyl compounds, effectively inhibits the generation of side reactions in detection, ensures the detection accuracy, and improves the product stability and effectively shortens the instrument equilibrium time by adding iodomethane and tetrabutylammonium iodide.

This invention relates to a 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt, its preparation method, and its application, belonging to the field of flocculation treatment technology for high-salt industrial wastewater from natural gas purification. To address the problem that the synthesis of cationic polymer flocculants in existing technologies requires large amounts of surfactants and involves complex operations, this application employs a substitution reaction between 1,1,2,2-tetrahydroperfluoroalkyl iodide and N-methylallylamine; iodomethane is then reacted with the substitution reaction product to undergo quaternization, yielding a 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt; the 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt is polymerized with acrylamide to obtain a novel cationic polyacrylamide flocculant. The synthesis of cationic fluorocarbon-modified hydrophobic associative polyacrylamide flocculants using an aqueous solution polymerization method is simple, requires no surfactants, and experiments show that the prepared flocculant exhibits excellent flocculation performance.

The invention provides an electroplating solution containing a novel additive and application of the electroplating solution in copper electroplating. The pyridine-2-acetaldehyde oxime methyl iodide is used as a novel copper electroplating additive (leveling agent) for the copper electroplating process, the cost is low, safety and no pollution are achieved, and the novel additive stably exists in the electroplating liquid. The novel additive is applied to the electrocoppering process, compact filling from bottom to top can be achieved, the surface of a plating layer is bright and flat, different adsorption behaviors of the additive can be regulated and controlled by regulating and controlling distribution of current density at interfaces of the inner surface and the outer surface of a micropore, and therefore the additive can be widely applied to high-density interconnection of electronic devices and can be applied to electrocoppering. And high-quality and high-stability signal transmission is satisfied.

The invention provides a synthesis method of N-substituted tropinone derivatives, and relates to the technical field of organic synthesis. The method provided by the invention comprises the step of reacting a tropinone compound with a fatty amine derivative in a solvent environment under the action of an acid accelerator to generate the N-substituted tropinone derivative in one step. Compared with a method that tropinone and a highly toxic reagent methyl iodide firstly react to generate a quaternary ammonium salt intermediate and then the quaternary ammonium salt intermediate and a fatty amine derivative are subjected to two-step synthesis under the action of alkali, the method is greener and more efficient, meanwhile, the used raw materials are cheap and easy to obtain, and the method is suitable for industrial production. The method has mild reaction conditions, is more suitable for large-scale production, has potential industrial value and has a wide application prospect.

The invention discloses a preparation method of a difluoromethyl reagent and application of the difluoromethyl reagent in synthesis of a nickel-catalyzed alkyl difluoromethyl compound. The preparation method of the difluoromethyl reagent comprises the following steps: in an inert gas atmosphere, adding potassium iodide, cuprous iodide and a water-containing dimethylformamide solution into a reaction container, heating, dropwise adding difluorochloroacetic acid of DMF (Dimethyl Formamide) into a reaction system, collecting difluoroiodomethane, and supplementing a 1-methyl-2-pyrrolidone NMP (N-Methyl Pyrrolidone) solution into the system. The invention provides a difluoromethyl reagent which is simple and convenient to operate, low in cost, high in yield, environment-friendly and beneficial to large-scale preparation and application of the reagent in synthesis of difluoromethyl substituted alkane compounds.

This invention relates to the field of perovskite solar cell technology, and discloses a method for preparing a low-dimensional perovskite thin film and its solar cell. The method for preparing the low-dimensional perovskite thin film is as follows: Step 1, weighing p-fluorophenylethylamine iodine, methyl iodide, lead iodide, formamidine iodide, methyl ammonium chloride, and lead chloride, and dispersing them in a mixed solution composed of dimethylformamide and dimethyl sulfoxide to obtain a low-dimensional perovskite precursor solution; Step 2, dropping the low-dimensional perovskite precursor solution onto a substrate, rapidly spin-coating for 10-20 seconds, and then subjecting it to reverse-order cooling annealing to obtain a low-dimensional perovskite thin film. This invention rapidly forms a low-dimensional perovskite wet film through high-speed spin-coating, followed by reverse-order cooling annealing, which not only enables the preparation of low-dimensional perovskite thin films with vertically grown multiphase structures, but also has good repeatability and reduces the manufacturing cost of battery devices. The reverse-order cooling annealing process described in this invention is simple and suitable for industrial production.

The invention relates to a chemical absorption liquid for removing methyl iodide and a preparation method thereof, and belongs to the technical field of underwriting. The chemical absorption liquid comprises the following raw materials in percentage by mass: 0.2-5% of sodium thiosulfate, 1-10% of long-chain alkyl trimethyl ammonium halide, 0-1% of sodium hydroxide, 0-10% of polyethylene polyamine and the balance of water. The number of long-chain carbon atoms in the long-chain alkyl trimethyl ammonium halide is greater than 8; the chemical absorption liquid is prepared by completely dissolving and uniformly mixing the components. According to the chemical absorption liquid, the long-chain alkyl trimethyl ammonium halide salt is introduced as a surfactant for the first time, has a solubilizing effect, and can greatly reduce the gas-liquid mass transfer resistance of methyl iodide, so that efficient absorption of radioactive and non-radioactive methyl iodide is realized; the chemical absorption liquid is not only suitable for normal temperature, but also suitable for high-temperature and high-humidity environments, and harmful gas can be purified in a solution washing or solution spraying mode.

The invention belongs to the technical field of chemical synthesis, and particularly relates to an indazole alkaloid derivative as well as a preparation method and application thereof. Comprising the following steps: under an alkaline condition, carrying out alkylation reaction on a compound a and an alkylating agent to obtain a compound b; performing demethylation reaction on the compound b and a demethylation reagent to obtain a compound c; carrying out glycosylation reaction on the compound c and sugar bromide to obtain a compound d; in a sodium methoxide and solvent system, removing acetyl on glycosyl of the compound d to obtain the indazole alkaloid derivative. Or carrying out oxidation reaction on the compound d and methyl iodide to obtain an intermediate; and removing acetyl on glycosyl of the intermediate in a sodium methoxide and solvent system to obtain the indazole alkaloid derivative. The invention provides a preparation method of an indazole alkaloid derivative, which is green, simple, convenient and efficient.

The invention belongs to the field of chemical homogeneous catalysis technology and chemical process, and provides an imidazolyl basic ionic liquid catalyst, and a preparation method and application thereof. The catalyst provided by the invention is obtained by carrying out quaternization reaction on N-methylimidazole and halogenated hydrocarbon (such as methyl iodide, bromoethane and the like) in a solvent to generate an intermediate halogen quaternary ammonium salt, and then carrying out ion exchange reaction on the intermediate, sodium hydroxide and an imidazole derivative (such as imidazole or 2-methylimidazole) in the solvent. The catalyst can be applied to catalysis of transesterification of methanol and propylene carbonate to prepare dimethyl cyclic carbonate, and has the advantages of efficient preparation process, mild reaction conditions, no metal, no pollution and simple catalytic system, and the highest yield of dimethyl carbonate can reach 95%.

The application relates to the field of adsorption separation, in particular to a novel ion type bipyridyl group COF material and a preparation method and application thereof. The preparation method comprises the following steps: mixing 2,2',6,6'-tetramethyl-4,4'-bipyridine, 2,2'-bipyridine-5,5'-diformaldehyde, sodium hydroxide, trimethylbenzene and methanol to carry out reaction 1, and COF-CQWU-2 is obtained; the COF-CQWU-2 is placed in a mixed solution of iodomethane and chloroform to carry out reaction 2, and the novel ion type bipyridyl group COF material is obtained. The application successfully designs and prepares a novel ion type bipyridyl group COF material I@COF-CQWU-2 for removing perfluorinated compounds in water, the COF material has the advantages of simple preparation method, high adsorption capacity and recyclability, and the target of selectively adsorbing perfluorinated compounds from water is achieved.

The present invention relates to the field of reducing methane emissions from ruminants. In particular, the present invention relates to administering to a ruminant diiodomethane in an amount of at least 0.5 g diiodomethane per animal per day for reducing methane production resulting from digestive activities of said ruminant.

The invention belongs to the technical field of organic chemical synthesis, and particularly relates to a synthetic method of deuterated toluene-D3, which comprises the following steps: reacting deuterated iodomethane with magnesium to obtain a Grignard reagent deuterated methyl magnesium iodide; and then carrying out coupling reaction on the deuterated methyl magnesium iodide and bromobenzene under the catalysis of a nickel metal catalyst to obtain the deuterated toluene-D3. The synthesis method solves the problems of many byproducts, high cost and low utilization rate of deuterated raw materials when the existing toluene synthesis process is used for preparing semideuterated toluene, realizes efficient synthesis of high-purity deuterated toluene-D3, greatly reduces the generation of polymethyl compounds, and is short in production period and simple in post-treatment.

The invention discloses a radioactive methyl iodide filtering material and a preparation method thereof, and belongs to the technical field of nuclear fuel waste gas treatment. The preparation method comprises the following steps: preparing a nitrogen-carbon skeleton from a reaction monomer through a cross-linking reaction; dispersing the nitrogen-carbon skeleton, a silver nitrate solution and an ionic liquid in water to obtain a mixed solution; the mixed solution is subjected to nano silver oxide in-situ growth in the environment of ultraviolet lamp irradiation and ultrasonic oscillation, and the radioactive methyl iodide filtering material is prepared. The radioactive methyl iodide filtering material is a nano silver oxide in-situ loaded nitrogen-carbon skeleton composite material and can be used as a radioactive methyl iodide filtering and storing material, efficient adsorption of radioactive methyl iodide is achieved through the chemical adsorption effect of nano silver oxide and methyl iodide, meanwhile, it is ensured that the adsorption process is stable and irreversible, and the radioactive methyl iodide filtering material can be used for filtering and storing radioactive methyl iodide. And no methyl iodide is released in a deep stratum treatment environment.

The present invention relates to a method for recovering unreacted iodine using an unreacted iodine recovery device comprising: a gas quenching device comprising a hollow cooling body into which a reaction gas mixture containing iodine (I2) discharged from a trifluoroiodmethane (CF3I) manufacturing process by the reaction of trifluoromethane (CF3H) and iodine (I2) is supplied to one side of the upper portion, and a first injection unit into which cooling water is sprayed from the upper portion of the cooling body; and a filtration device comprising a hollow filtration body having a filter with a plurality of through holes formed in the lower portion of the gas quenching device, and a second injection unit into which cleaning water is sprayed from the upper portion. A cooling step in which a high-temperature reaction gas mixture is supplied to the above-mentioned cooling body and cooling water is sprayed from the first injection part to cool the reaction gas mixture and gaseous iodine (I2) is precipitated, and The above aqueous solution and solid iodine (I2) flow into a filtration device and undergo a filtration step in which the aqueous solution and iodine (I2) are separated by a filter, and The present invention relates to a method for recovering unreacted iodine, characterized in that the iodine (I2) filtered by the above filter is cleaned by spraying cleaning water from a second spraying unit.

A mixed refrigerant composition includes carbon dioxide (R-744), 2,3,3,3-tetrafluoropropene (R-1234yf) and trifluoroiodomethane (R-13I1). A content of the carbon dioxide (R-744) ranges from 1 to 10 wt. % based on a total weight of the mixed refrigerant composition, and a sum of a content of the 2,3,3,3-tetrafluoropropene (R-1234yf) and a content of the trifluoroiodomethane (R-13I1) ranges from 90 to 99 wt. % based on the total weight of the mixed refrigerant composition. A boiling point at 1 atm of the mixed refrigerant composition ranges from −76 to −35° C.

The invention relates to the field of preparation of organic raw materials, in particular to a method and a device for preparing neopentane. The invention provides a neopentane preparation method and device, and the preparation method comprises the following steps: adding tert-butyl magnesium chloride, methyl iodide and an anhydrous organic solvent as raw materials into a reactor under the protection of inert gas for reaction; according to the method, tert-butylmagnesium chloride and iodomethane are used as raw materials to perform chemical reaction to generate the neopentane, a catalyst cuprous iodide and a catalyst complex 1, 3-butadiene can also be added to participate in the reaction to improve the purity of the neopentane, the reaction temperature is 20-30 DEG C, the reaction conditions are mild, and the purity of the neopentane is high and can reach 60%. The problems that in the prior art, reaction conditions for preparing neopentane are harsh, the reaction cost is high, and the process is not easy to amplify are solved.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The invention relates to the technical field of non-natural amino acid synthesis, and particularly discloses a synthesis method of N-methyl chiral Fmoc amino acid. The invention relates to a synthesis method of N-methyl chiral Fmoc amino acid, which comprises the following steps: reacting amino acid methyl ester with ethyl trifluoroacetate under the action of alkali to generate a compound 1; reacting the compound 1 with methyl iodide under the action of alkali to introduce methyl so as to generate a compound 2; hydrolyzing the compound 2 under the action of alkali, and then introducing an Fmoc group to obtain a target product. The N-methyl chiral Fmoc amino acid synthesis method has the advantages of high safety, high product yield and purity, cheap and easily available raw materials in the synthesis process, simple operation process and universality, and is suitable for large-scale expanded production.

The invention discloses a mirror-polished thin ceramic rock plate and a preparation method thereof, and relates to the field of ceramics. When the mirror-polished thin ceramic rock plate is prepared, octamethylcyclotetrasiloxane, 3-dimethylaminopropyl (dimethoxy) methylsilane and vinyl pentamethyldisiloxane are subjected to a reaction, and polysiloxane is prepared; acrylic acid-2-hydroxyethyl ester and cyanuric chloride react to prepare a cross-linking agent, polysiloxane, the cross-linking agent, chloropropane and methyl iodide react to prepare a hydrophobic antibacterial coating material, the hydrophobic antibacterial coating material and a photoinitiator are evenly mixed, then the surface of a ceramic rock plate is coated with the mixture, and ultraviolet curing is conducted to prepare the hydrophobic antibacterial ceramic rock plate. The mirror-polished thin ceramic rock plate prepared by the preparation method disclosed by the invention has good antibacterial property and hydrophobic property.

The application belongs to the technical field of anion exchange membranes, and discloses an oxygen-containing fluorene polyarylpiperidine type anion exchange membrane and a preparation method thereof. A piperidine type trimonomer polymer with good alkali stability and mechanical properties is synthesized, the main chain structure of the polymer is controlled by controlling the feeding proportion of monomers, the polymer is reacted with iodomethane to obtain a quaternary ammonium polymer, and the quaternary ammonium polymer is used for casting a film. The prepared membrane has good dimensional stability and good ion conductivity, has good alkali stability and mechanical strength, and can be applied to alkaline fuel cells and alkaline water electrolysis.

The invention discloses a bridged ring phloroglucinol antibacterial compound as well as a preparation method and application thereof, and belongs to the field of medicinal chemistry and anti-infection pharmacy. The structural general formula of the bridged ring phloroglucinol antibacterial compound is shown in the specification. The preparation method specifically comprises the following steps: (1) preparing a compound B by taking methyl iodide, sodium methoxide and a compound A as raw materials; (2) preparing a compound C by taking diisobutylaluminium hydride, the compound B, 2, 6-dimethyl pyridine and trifluoromethanesulfonic anhydride as raw materials; (3) preparing a compound D by taking palladium acetate, triphenylphosphine, the compound C, triethylamine and formic acid as raw materials; and (4) preparing a target product by taking the compound D, hexafluoroisopropanol, p-toluenesulfonic acid, the compound E, chiral phosphoric acid and ytterbium trifluoromethanesulfonate as raw materials. The compound disclosed by the invention shows high selectivity, low drug resistance risk and a potential new action mechanism, and provides a new leading structure and a technical path for overcoming drug resistance of existing antibacterial drugs.

The invention provides a synthesis method of L-3-aminoisobutyric acid. The synthesis method comprises the following steps: enabling a dichloromethane solution of cyanoacetic acid to react with oxalyl chloride; a reaction product, (S)-4-benzyl-2-oxazolidinone dissolved in dichloromethane and triethylamine are respectively fed into a continuous flow reactor to be mixed and react with the (S)-4-benzyl-2-oxazolidinone dissolved in dichloromethane; collecting reaction liquid, extracting, concentrating and recrystallizing to obtain a compound 2; dissolving the compound 2 in tetrahydrofuran, and adding iodomethane; respectively feeding the mixed solution and a tetrahydrofuran solution of lithium diisopropylamide into a continuous flow reactor for mixing reaction; collecting reaction liquid, quenching and purifying to obtain a compound 3; dissolving the compound 3 in a mixed solvent of an organic solvent and water, adding lithium hydroxide and hydrogen peroxide, and reacting; adding a sodium sulfite aqueous solution for quenching reaction, extracting, concentrating and purifying to obtain a compound 4; dissolving a compound 4 in ethanol, and carrying out a continuous flow hydrogenation reaction with hydrogen through a continuous flow hydrogenation reactor; and collecting a reaction product, concentrating, cooling and crystallizing to obtain the L-3-aminoisobutyric acid.

The invention relates to a method for efficiently preparing flurbiprofen based on a Suzuki-Miyaura coupling reaction. The preparation method comprises the following steps: taking ethyl cyanoacetate as a raw material, and carrying out methylation reaction on the ethyl cyanoacetate and methyl iodide or dimethyl sulfate to prepare racemic ethyl 2-cyanopropionate; the racemic ethyl 2-cyanopropionate and 4-bromine-2-fluorobiphenyl are subjected to a similar Suzuki-Miyaura reaction under the combined action of a zero-valent palladium metal catalyst, a metal stabilizer phosphine ligand and alkali, and the racemic ethyl 2-cyano-2-(2-fluoro4-biphenyl) propionate is obtained; and carrying out hydrolysis and decarboxylation on the racemic 2-cyano-2-(2-fluoro-4-biphenyl) ethyl propionate to obtain racemic 2-(2-fluoro-4-biphenyl) propionic acid, namely, the flurbiprofen. The process route comprises three steps of reaction, materials are cheap and easy to obtain, operation is simple, aftertreatment is convenient, and the obtained product is high in purity.

The invention discloses a synthesis method of hydrogen isotope labeled vortioxetine. The synthesis method comprises four steps of reaction: construction of diaryl sulfide, selective deuteration of methyl, selective reduction of cyano and coupling reaction of carbon-nitrogen bonds. According to the key step, deuterated dimethyl sulfoxide is used as a deuterium source under the catalysis of a methyl selective deuterated alkali metal catalyst, and methyl deuterated dimethyl sulfoxide and a methyl benzene intermediate are selectively subjected to a methyl deuterated reaction. The method effectively avoids the harsh condition of low temperature for introducing a deuterated methyl scheme after aryl halogenated hydrocarbon lithium halide exchange and deuterated iodomethane reaction, avoids the generation of dehalogenation byproducts, and overcomes the defects that the product is difficult to purify, the reaction is difficult to amplify and produce and the like. The key step of the invention adopts a specific alkali metal salt as a catalyst to carry out methyl deuteration reaction, and combines cyanobenzene to selectively reduce and construct another methyl, so the method has the remarkable advantages of low cost, environmental protection, simple process and suitability for industrial production.

This invention provides a multi-backbone copolymerized polyaryl anion exchange membrane, its preparation method, and its applications. The preparation method of the multi-backbone copolymerized polyaryl anion exchange membrane includes: polycondensing an aromatic compound, N-methylpiperidinone, and 3-quinine cycloketone hydrochloride under a strong acid catalysis to obtain a polymer intermediate; then, quaternizing the polymer intermediate with terminal halogenated perfluorinated long-chain alkanes and iodomethane to introduce hydrophobic side chains, obtaining membrane powder; finally, dissolving and coating the membrane powder to form a membrane. This invention effectively improves the polymer molecular weight and main chain alkali resistance by introducing 3-quinine cycloketone into the copolymerization process; simultaneously, by introducing hydrophobic side chains of perfluorinated alkanes, a hydrophilic-hydrophobic phase separation structure is constructed, forming an effective ion transport channel. The resulting multi-backbone copolymerized polyaryl anion exchange membrane has advantages such as low swelling ratio, high mechanical strength, high chemical stability, strong alkali resistance, and low membrane resistance, and can be widely used in fields such as water electrolysis for hydrogen production.

The application discloses a high-pressure tail gas recycling device for low-pressure carbonyl synthesis of acetic acid from methanol, and a buffer reactor is additionally arranged between a main reactor and a high-pressure separator and a flash evaporator, which is used as a reaction container for high-pressure tail gas and liquid-phase materials in the main reactor. The application also discloses a high-pressure tail gas recycling method, in which methanol and carbon monoxide are pressurized and then enter the main reactor for reaction, and part of high-pressure gas is discharged to a top condenser and a high-pressure separator for treatment to obtain high-pressure tail gas. The treatment steps are as follows: the high-pressure tail gas discharged from the high-pressure separator enters the buffer reactor; the high-temperature and high-pressure liquid-phase materials in the main reactor are partially extracted to the buffer reactor for reaction with the high-pressure tail gas; the liquid-phase materials in the buffer reactor are extracted to the flash evaporator for gas-liquid separation, the gas-phase components are sent to a product rectification system, and the liquid-phase components are returned to the main reactor. The application directly recycles iodomethane and carbon monoxide in the high-pressure tail gas, and reduces the consumption of raw materials and auxiliary catalysts for acetic acid synthesis products.