23 results about "Bromoethane" patented technology

The invention relates to the field of pouring sealants, and discloses a modified epoxy resin pouring sealant and a preparation method thereof, the pouring sealant comprises epoxy resin, a modified inorganic filler, a modified additive and an auxiliary agent; the modified inorganic filler is prepared by grafting a quaternized s-triazine derivative and an inorganic filler; the quaternized s-triazine derivative is prepared through the steps that 3, 5-diaminophenylboronic acid, cyanuric chloride, 3-chloropropyltrimethoxysilane and 1, 4-butanediamine are sequentially subjected to substitution to prepare a s-triazine derivative, then the s-triazine derivative reacts with N, N-dimethyl-1, 3-diaminopropane, and bromoethane is used for quaternization treatment. The modified additive is prepared from a modified bismaleimide monomer prepared from maleic anhydride and 5 (6)-amino-1-(4-aminophenyl)-1, 3, 3-trimethylindane and 1-methyl-4-isopropyl cyclohexene through a self-stabilization precipitation polymerization method, the prepared pouring sealant is high in tensile strength, good in impact resistance and good in mechanical property, and the prepared pouring sealant has the advantages of being good in mechanical property, good in mechanical property and good in mechanical property. Meanwhile, good heat resistance, flame retardance, dielectricity and antibacterial activity are achieved.

The invention provides a preparation method of N, N-diisopropylethylamine based on a liquid-phase compression synthesis process, which comprises the following steps: mixing ethanol with hydrobromic acid with specified concentration, and carrying out reactive distillation treatment in the presence of a phase transfer catalyst to generate bromoethane; p-bromoethane and diisopropylamine are subjected to a liquid phase addition and compression combination reaction, and a reaction mixture is obtained; and sequentially neutralizing, distilling, condensing and filtering the reaction mixture to obtain the N, N-diisopropylethylamine, so as to solve the problems that the existing preparation method of the N, N-diisopropylethylamine is high in energy consumption, high in operation risk, large in pollutant discharge amount, low in by-product resource utilization rate, low in cost and the like. The safety is poor; the energy efficiency is low; and by-products cannot be recycled.

This invention provides an N,N-diethylpyrrolidine difluorosulfonylimide salt, its preparation method, and its applications, belonging to the field of ionic liquid materials technology. The preparation method of the N,N-diethylpyrrolidine difluorosulfonylimide salt of this invention includes the following steps: reacting potassium carbonate solution, tetrahydropyrrole, and bromoethane in an inert atmosphere; then dissolving the reaction product in an organic solvent, filtering, and evaporating to obtain N,N-diethylpyrrolidine bromide; dissolving the N,N-diethylpyrrolidine bromide in water, adding activated carbon for decolorization treatment, to obtain an aqueous solution of N,N-diethylpyrrolidine bromide; and subjecting the aqueous solution of N,N-diethylpyrrolidine bromide to an ion exchange reaction with lithium difluorosulfonylimide in an organic solvent to obtain the final product. The preparation method of this invention separates the reaction product and byproduct into liquid and solid phases, and the reaction does not introduce other impurity ions, greatly improving the purity of the product.

The invention discloses a preparation method of 2, 2 '-bis (trifluoromethyl) biphenyl. The invention specifically discloses a preparation method of 2, 2 '-bis (trifluoromethyl) biphenyl, which comprises the following steps of: I, reacting o-chlorobenzotrifluoride with magnesium in a solvent in the presence of lithium chloride, ethyl magnesium bromide and bromoethane to obtain a Grignard reagent; and step II, in a mixed gas atmosphere of oxygen and nitrogen, in the presence of ferric trichloride, carrying out a self-coupling reaction on the Grignard reagent obtained in the step I to obtain 2, 2 '-bis (trifluoromethyl) biphenyl. The raw materials in the synthesis route are cheap and easy to obtain, particularly, the green, cheap and easy-to-obtain mixed gas of oxygen and nitrogen is adopted as the oxidizing agent, and the process yield is high.

The invention discloses a combined antibacterial cationic covalent organic polymer and application thereof, and belongs to the technical field of biological medicines. The cationic covalent organic polymer is obtained by taking tris (6-methyl-2-pyridyl) phosphine as a phosphorus-containing monomer, ferrocene dicarboxaldehyde as a photo-thermal active unit and bromoethane as a quaternization reagent and carrying out ternary polymerization through a Williamson synthesis reaction. The preparation method comprises the following steps: firstly, preparing a polymer precursor, then preparing a metallized cation organic framework (iFc-POP) with good photo-thermal and photodynamic activity through ethylation and metal insertion modification, and enhancing the antibacterial effect of the polymer through the synergistic effect of cation adsorption, photo-thermal heating and multiple enzyme activities. The antibacterial material can effectively penetrate through a mature biological membrane for sterilization, and a new thought is provided for practical application of the antibacterial material.

The invention provides preparation and application of a low-linear-expansion naphthyl amine curing agent, which are characterized in that firstly, iron powder and excessive HCl solution are added into 2-nitronaphthalene for chemical reduction reaction to generate 2-naphthylamine; the preparation method comprises the following steps: reacting 2-naphthylamine with acetyl chloride under an anhydrous condition, carrying out acetylation protection on amino groups to generate N-acetyl-2-naphthylamine, adding bromoethane into the N-acetyl-2-naphthylamine, then carrying out Friedel-Crafts alkylation reaction on the N-acetyl-2-naphthylamine and bromoethane under the catalysis of anhydrous AlCl3, introducing ethyl groups at the 1-position and the 3-position of a naphthalene ring, and then removing acetyl protection to obtain 1, 3-diethyl-2-naphthylamine; the preparation method comprises the following steps: carrying out an intermolecular Friedel-Crafts alkylation reaction on 1, 3-diethyl-2-naphthylamine and 1, 2-dichloroethane under the catalysis of anhydrous AlCl3 to obtain a low linear expansion naphthylamine curing agent 1, 2-bis (1, 3-diethyl-2-naphthylamine) ethane; compared with an original curing agent, low expansion is guaranteed, and meanwhile high heat resistance is also achieved.

The invention discloses an industrial preparation method of metafluzamide, which comprises the following steps: step S1, reacting 4-aminopyridazine with bromoethane in the presence of a catalyst 4, 7, 13, 16, 21, 24-hexaoxo-1, 10-diazabicyclo [8.8. 8] hexacodecane and an acid binding agent to obtain N-ethylpyridazine-4-amine, and step S2, reacting 4-aminopyridazine with bromoethane in the presence of a catalyst 4, 7, 13, 16, 21, 24-hexaoxo-1, 10-diazabicyclo [8.8. 8] hexacodecane to obtain N-ethylpyridazine-4-amine; s2, reacting methyl isopropyl ketone with hydrazine hydrate to obtain 3-methylbutyl-2-subunit hydrazine, carrying out reduction reaction on the 3-methylbutyl-2-subunit hydrazine to obtain 3-hydrazino-2-methyl butane, and carrying out cyclization reaction on the 3-hydrazino-2-methyl butane and the compound as shown in the formula 1 in the presence of formic acid to obtain a compound as shown in a formula 2; s3, enabling the N-ethylpyridazine-4-amine to react with the compound shown in the formula 2 under the catalytic action of 2, 2, 2-trifluoroethanol, so as to obtain the metafluzamide. According to the present invention, the method has characteristics of simple steps, easily available raw materials, mild reaction conditions and high total yield, and is suitable for industrial production.

The application relates to an adsorptive retarder, a self-generating acid plugging removal fluid and a preparation method thereof, and belongs to the technical field of oil and gas development. The preparation method of the adsorptive retarder comprises the following steps: S1. n parts of polyethylene imine are dissolved in a solvent, and then 2x parts of bromoethane are added dropwise for reaction; S2. triethylamine is added and stirred uniformly, and then y parts of diethyl phosphinite are added dropwise for reaction; S3. the reaction product prepared in the step S2 is distilled under reduced pressure, hydrolyzed, and then precipitated, washed and dried. According to the mass percentage, the self-generating acid plugging removal fluid comprises 0.3%-2.0% of the adsorptive retarder, 15%-40% of a live acid agent, 5%-15% of a fluorine source, 0.8%-3.0% of a corrosion inhibitor, 0.5%-2.5% of an iron ion stabilizer and 0.5%-1.0% of a cleanup agent, and the rest is water. The plugging removal fluid can not only inhibit corrosion of the pipe column at high temperature, but also control the acid-rock reaction rate, maximally protect the rock matrix, avoid waste of the acid liquid, force the acid liquid to penetrate into the deep stratum and realize efficient and accurate removal of the plugging material.

The invention relates to a selective hydrogenation reduction method of a non-conjugated ketene compound, which comprises the following steps: in a nitrogen atmosphere, mixing a ketene compound shown as a formula (I), a hydrogen source, a catalyst, a ligand, a reducing agent and an organic solvent, and stirring at room temperature for 8-24 hours to obtain a reaction solution; and performing column chromatography separation and purification on the reaction liquid to obtain the alkyl ketone compound as shown in the formula (II). According to the method, iodoethane or bromoethane is used as a hydrogen source, and compared with the prior art, the method has the advantages of higher yield, mild reaction conditions, good selectivity, no need of high-pressure hydrogen, no pungent smell and environmental protection.

The invention relates to an adsorption type retarder, a retarding type authigenic acid plug removal liquid and a preparation method of the retarding type authigenic acid plug removal liquid, and belongs to the technical field of oil and gas development. The preparation method of the adsorption type retarder comprises the following steps: S1, dissolving n parts of polyethyleneimine in a solvent according to the amount of substance, dropwise adding 2x parts of bromoethane, and reacting; s2, adding triethylamine, uniformly stirring, and dropwise adding y parts of diethyl phosphonite for reaction; and S3, carrying out reduced pressure distillation on the reaction product prepared in the step S2, hydrolyzing, precipitating, washing and drying. The retarding type self-acidogenic blocking removal liquid comprises the following components in percentage by mass: 0.3%-2.0% of the adsorption type retarding agent, 15%-40% of an acid generator, 5%-15% of a fluorine source, 0.8%-3.0% of a corrosion inhibitor, 0.5%-2.5% of an iron ion stabilizer, 0.5%-1.0% of a discharge aiding agent and the balance of water. The blockage removing liquid can be used for inhibiting corrosion of a tubular column at high temperature, controlling the reaction rate of acid rocks, protecting a rock matrix to the greatest extent, avoiding waste of acid liquid, forcing the acid liquid to penetrate into the deep part of a stratum, and realizing efficient and accurate removal of blockages.

The invention discloses a low-chlorine low-alkene tetrabromoethane synthesis method in the technical field of chemical synthesis, which comprises the following steps: synthesizing tetrabromoethane in a gas-liquid microporous continuous reactor by using a mixed gas of acetylene and nitrogen and bromine; a rotatable membrane assembly is arranged in a gas-liquid mixing through cavity of the gas-liquid microporous continuous reactor, the membrane assembly comprises a microporous membrane, a bromine inlet is connected with the gas-liquid mixing through cavity, a mixed gas inlet is connected with an inner side cavity of the microporous membrane, the gas-liquid mixing through cavity is connected to a tetrabromoethane collecting through cavity through a plurality of micropipes, and the tetrabromoethane collecting through cavity is connected with a gas inlet of the gas-liquid microporous continuous reactor. The reaction liquid leaves the device through a reaction liquid outlet, and the high-purity tetrabromoethane is obtained through alkali washing, water washing and adsorption of the reaction liquid after the reaction. Acetylene passes through membrane holes in the form of microbubbles, and forms a thickness lt with bromine on the surface of the membrane; a 10 [mu] m transient liquid film reaction zone; further addition reaction is completed in the microtube. The content of inorganic chloride, organic chloride and halogenated olefin in the finished product is low, and the quality of the product can be improved.

This invention relates to the field of organic synthesis reagent preparation technology, specifically to a novel Grignard preparation with activation system and its preparation method. The raw material composition includes: 1 mol of magnesium, 1.05 mol-1.35 mol of haloalkanes, 0.5 mmol-1.8 mmol of 1,2-dibromoethane, 0.3 mmol-0.9 mmol of cuprous iodide, and a mixed solvent of ethers and aromatics; the magnesium raw material is large-particle magnesium or magnesium ingots. This invention constructs a synergistic system of composite chemical activation and ultrasonic physical activation, efficiently breaking down the oxide passivation layer on the magnesium surface, significantly improving reaction activation efficiency, shortening the reaction start-up cycle, and making the reaction start-up faster and more stable.

The invention relates to the field of high polymer materials, and discloses an antibacterial medical silica gel suction nozzle cover and a preparation method thereof, the antibacterial medical silica gel suction nozzle cover comprises silicone rubber, modified nano titanium dioxide, modified multi-walled carbon nanotubes, a vulcanizing agent and a lubricant; the modified nano titanium dioxide is prepared by the following steps: reacting 1H-benzimidazole-2-mercaptan with 2-chloro-N-(3, 4-dichlorophenyl) acetamide, then reacting with 3-chloropropyltriethoxysilane to prepare a functional silane coupling agent, and grafting the functional silane coupling agent on the surface of nano titanium dioxide. The modified multi-walled carbon nanotube is prepared by grafting a quaternized maleopimaric acid derivative on the surface of a functionalized multi-walled carbon nanotube subjected to acid treatment and polyethyleneimine surface modification; the quaternized maleopimaric acid derivative is prepared by sequentially reacting maleopimaric acid with N, N-dimethylethylenediamine and bromoethane, and the silica gel suction nozzle cover prepared by the preparation method disclosed by the invention has good mechanical properties, thermal oxidative aging resistance, antibacterial property and antibacterial long-acting property.

Belonging to the technical field of ethyl tetrahydrofurfuryl ether production, the invention discloses a heterogeneous catalysis-based ethyl tetrahydrofurfuryl ether continuous reaction device, which comprises a base, the inner bottom of the base is provided with a filtrate storage bin, the top of the base is horizontally and rotatably provided with a barrel, and the inside of the barrel is symmetrically provided with reaction bins. The barrel body is rotatably mounted at the top of the machine base, and the two groups of reaction bins are symmetrically formed in the barrel body, so that three key processes of alkoxide intermediate generation, bromoethane addition and tetrahydrofurfuryl alcohol conversion are synchronously disassembled from a single bin body into separated bin continuous propulsion; the production of the alkoxide intermediate and the addition of bromoethane are carried out in the same reaction bin, and the conversion of tetrahydrofurfuryl alcohol is carried out in the other reaction bin, so that the complementary connection of the reaction processes of the two reaction bins is realized, the waste time of waiting for the completion of a certain process by a single barrel body is avoided, the unit time output efficiency of ETHE is obviously improved, and the productivity bottleneck is effectively broken through.

The application relates to the field of pouring sealant, and discloses a modified epoxy resin pouring sealant and a preparation method thereof. The pouring sealant comprises an epoxy resin, modified inorganic fillers, modified additives and an auxiliary agent. The modified inorganic fillers are prepared by grafting quaternary ammonium s-triazine derivatives onto inorganic fillers. The quaternary ammonium s-triazine derivatives are prepared by sequentially substituting 3,5-diaminophenyl boronic acid, cyanuric chloride and 3-chloropropyl trimethoxysilane with 1,4-butanediamine, and then reacting with N,N-dimethyl-1,3-diaminopropane and quaternized by bromoethane. The modified additives are prepared by using modified bismaleimide monomers prepared from maleic anhydride and 5(6)-amino-1-(4-aminophenyl)-1,3,3-trimethylindane and 1-methyl-4-isopropyl cyclohexene by self-stabilizing precipitation polymerization. The pouring sealant prepared by the application has high tensile strength, good impact resistance, good heat resistance, good flame retardance, good dielectricity and good bacteriostasis.

The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a biological agent for rapidly activating underground in-situ microorganisms and a preparation method and application thereof. The preparation method comprises the following steps: adding potato starch into DMF (Dimethyl Formamide), regulating the pH value to 8-9 by using sodium hydroxide, adding 2-bromoethane phosphoric acid, and carrying out heat preservation reaction; adding aziridine carboxylic acid methyl ester, keeping the temperature to react, and adjusting the pH value to be 6-7; and adding ethanol, separating out solids, centrifuging, cleaning with ethanol for 2-3 times, drying and grinding to obtain the biological preparation. The biological agent disclosed by the invention can be quickly utilized by microorganisms so as to quickly activate in-situ microorganisms in a stratum, and the absorbance is kept stable within 10-12 hours.

The application discloses a kind of straw extraction special adsorption resin and preparation method thereof, belong to adsorption resin technical field, comprising the following steps: polystyrene microspheres are placed in bromoethane, batch equivalent zinc chloride is added, 301K is stirred under and reacts 12h, and brominated polystyrene microspheres are obtained;Nitrobenzene is added under nitrogen protection, and after stirring 12h, the mixture consisting of 5-hydroxymethyl furfural, gallic acid and dichloroethane is added, zinc chloride is added, and 343K is stirred under and reacts 4h, zinc chloride is added again, and after 358-368K reacts 10h, cooling, extraction, vacuum drying can be carried out after extraction, extraction, vacuum drying, the adsorption capacity of the straw extraction special adsorption resin of the application to 5-hydroxymethyl furfural can reach 69.4mg / g wet resin, elution rate is greater than 99.7%, and high-efficiency separation of 5-hydroxymethyl furfural is realized.

The invention discloses a method for producing ethanol by anaerobic fermentation of straws under medium and high temperature conditions, and belongs to the technical field of biomass energy conversion. According to the method, straw with high lignocellulose content is taken as a raw material, after superfine grinding and 200-mesh sieving pretreatment are carried out, a rumen microorganism stock solution (the solid content is 8%, and the inoculation amount is 8%-15% of the dry weight of the straw) from cow dung is inoculated to construct a fermentation system, no specific yeast or invertase needs to be added in the whole process, and the initial pH does not need to be regulated and controlled. Transferring the fermentation system into an anaerobic tank, introducing nitrogen with the purity of more than or equal to 99.9% for 15-20 minutes to construct an anaerobic environment, adding 30-50 mM of 2-bromoethanesulfonic acid sodium salt to inhibit methane generation, and fermenting at the constant temperature of 42-48 DEG C, wherein the ethanol content can reach 880 mg / L or above and is 885.6 mg / L at most on the first day of fermentation, and the ratio of ethanol to the total organic acid is more than or equal to 19.3%; centrifugal precipitation can be recycled as a fermentation base material, and the straw utilization rate is high. According to the method, the production cost is greatly reduced, the process is simplified, methane emission is inhibited, and the method has economical efficiency and environmental friendliness and is suitable for industrial application of large-scale production of ethanol from straw.

This invention discloses a method for preparing cis-1,2-dibromoethylene based on steric hindrance, belonging to the field of technical organic synthesis. The method includes the following steps: (a) providing reactors A and B connected in series. Bromine is added to reactor A, and a solvent and configuration-selective catalyst are added to reactor B. This invention employs a series reactor system. Under the synergistic effect of a copper / crown ether composite catalyst and ultraviolet light, a highly selective addition reaction of acetylene with bromine is achieved by controlling the solvent system, reaction temperature, and material ratio. Using acetonitrile or perfluoroalkane as solvent, and copper chloride and crown ethers (such as 15-crown-5) as catalysts, the reaction is carried out at 30-80℃ under 200-400nm ultraviolet light. The selectivity of cis-1,2-dibromoethylene is ≥95%, which has advantages such as mild reaction conditions, solvent recyclability, and suitability for industrial production. Furthermore, the cis selectivity is improved to ≥95%; the content of the byproduct tetrabromoethane is <0.5%; and the solvent recovery rate is >98%.

The invention provides silicon aryne resin and a preparation method thereof. The silicon aryne resin is prepared from the following raw material components in parts by weight: 12 to 16 parts of magnesium chips, 60 to 65 parts of bromoethane, 30 to 36 parts of diacetylene benzene, 0.5 to 1.0 part of vinyl trichlorosilane, 18 to 21 parts of methyl vinyl dichlorosilane, 172 to 198 parts of methyl tetrahydrofuran, 18 to 21 parts of acetic acid and 250 to 350 parts of deionized water. The invention also provides a silicon aryne resin composite material and a preparation method thereof, and the silicon aryne resin composite material is prepared by alternately arranging quartz glass fiber yarns and hollow quartz glass fiber yarns on a yarn collecting frame at intervals according to the quantity ratio of 1: 1, and then sequentially dewaxing, dipping in a silicon aryne resin solution, baking and curing. The molecular structure of the silicon aryne resin contains aromatic rings, silane, alkynyl and other structural groups, and the resin can form a spatial network structure with high aromatic ring content after being cured, and has excellent high temperature resistance.

The application discloses a molecular fluorescent probe for detecting Hg 2+ , and a preparation method and application thereof, and has a structural formula: the preparation method comprises the following steps: firstly, reacting phenoxazine with 1-bromoethane to obtain compound A; then, generating compound B under the action of DMF and POCl3; and finally, reacting with 1,3-indane diketone to obtain the molecular fluorescent probe. The molecular fluorescent probe has the advantages of simple structure, convenient synthesis, easily obtained raw materials, low cost, high selectivity and high sensitivity, and has important practical application values for detecting samples containing Hg 2+ in the environment.

The utility model provides a permanent violet alkylation device capable of stably dropwise adding bromoethane, which relates to the technical field of permanent violet preparation systems and comprises a reaction kettle, a stable feeding component and a liquid caustic soda elevated tank, a feeding port is further arranged on the reaction kettle, the stable feeding component comprises a bromoethane storage part, a conveying part and a feeding pipe, and a cooling coil is arranged outside the bromoethane storage part. An outlet of the liquid caustic soda head tank is connected with an inlet of the reaction kettle, an outlet of the bromoethane storage part is connected with an inlet of the conveying part, an outlet of the conveying part is connected with an inlet of the feeding pipe, the feeding pipe is connected with the reaction kettle, and the bottom of the feeding pipe is located at the lower part of the reaction kettle; during alkylation reaction, bromoethane is cooled through the cooling coil outside the bromoethane storage part, bromoethane gasification is avoided, then liquid-phase bromoethane is stably and dropwise added and conveyed to the bottom of the liquid phase in the reaction kettle through the conveying part and the feeding pipe, and the situation that the bromoethane cannot be added into the reaction kettle due to pressure rise in the reaction kettle, so that the reaction kettle is more stable is avoided. The alkylation reaction yield is improved.

The application discloses a novel coumarin derivative containing a quinazoline unit (as shown in structural formula I), and a preparation method thereof. The preparation method comprises the following steps: subjecting a coumarin molecule A treated by a sodium hydroxide solution to etherification reaction with a 4-chloroquinazoline molecule B in acetonitrile by heating, and then subjecting an intermediate product C obtained by the reaction to reaction with benzyl chloride or bromoethane in acetonitrile by heating, so as to obtain the novel coumarin derivative I containing the quinazoline unit. The novel coumarin derivative containing the quinazoline unit is a novel compound, has obvious inhibiting effect on human pancreatic cancer cells (PANC-1), human gastric cancer cells (SGC7901) and human breast cancer cells (MDA-MB-231), and can be developed as a novel anti-tumor drug candidate molecule.