37 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.

The application discloses a preparation method of ammonium glufosinate, which comprises the following steps: adding diethyl malonate and liquid bromine into a first solvent to react to obtain intermediate I; adding the intermediate I, potassium phthalimide and a quaternary ammonium salt catalyst into toluene to react to obtain intermediate II; adding the intermediate II, potassium carbonate, 1,2-dibromoethane and a phase transfer catalyst into a second solvent to react to obtain intermediate III; adding the intermediate III and diethyl methyl phosphonite into toluene to react under argon to obtain intermediate IV; adding the intermediate IV into hydrochloric acid to react under reflux; cooling, precipitation, drying to obtain intermediate V; mixing the intermediate V with water, passing in ammonia and adjusting pH value; adding methanol and stirring to react; cooling, filtering and drying to obtain ammonium glufosinate. The method can avoid using sodium cyanide or hydrocyanic acid, and no large amount of difficult-to-separate ammonium chloride is generated, the content of the obtained ammonium glufosinate is 90% to 98%, and the total yield is greater than 68%.

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%.

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.

This invention relates to the field of flocculant technology, and discloses a polyacrylamide flocculant for sludge treatment and its preparation process. The polyacrylamide flocculant for sludge treatment prepared by this invention comprises the following raw materials: water, modified starch, prepolymer, and bromoethane; the prepolymer includes butyl acrylate, water, sodium dodecyl sulfate, acrylamide, N,N-methylenebisacrylamide, glycidyl methacrylate, modified silica, ammonium persulfate, and sodium bisulfite; the modified silica includes vinyltriethoxysilane-modified nano silica; the modified starch includes corn starch, N,N'-(1,2-ethanediyl)bisaspartic acid, sodium alginate, water, sodium sulfate, and phosphorus oxychloride; the obtained polyacrylamide flocculant for sludge treatment has a high molecular weight hyperbranched structure and good flocculation effect.

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 application provides a quick-dissolving ternary copolymer emulsion type fracturing fluid thickening agent and a preparation method, and relates to the field of oil and gas exploitation. N,N,N'-trimethyl-N'-allyl ethylenediamine (TMPEMA) is prepared by reacting chloropropylene with N,N,N'-trimethyl ethylenediamine, and (N,N-dimethyl-N-ethyl-N'-allyl-N'-methyl-N'-ethyl)-ethyldibromide functional monomer is prepared by reacting TMPEMA with bromoethane. A monomer solution is prepared by using acrylamide, sodium p-styrene sulfonate and the functional monomer as an aqueous phase, using an emulsifier and liquid paraffin as an oil phase, slowly adding the aqueous phase into the oil phase, stirring uniformly under N2, and then adding an initiator drop by drop to perform inverse emulsion polymerization, so as to prepare the fracturing fluid thickening agent. The ternary copolymer fracturing fluid thickening agent has excellent viscosity increasing property, quick-dissolving capacity, salt resistance, temperature resistance and shear resistance. The prepared fracturing fluid has good viscoelasticity, gel breaking property, sand carrying property, filtration loss reducing property and the like, can be used as slick water at a low concentration and can be used as a sand carrying liquid at a high concentration, and has a good application prospect in offshore and shale oil and gas development.

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 present invention relates to the field of adhesive technology and discloses a weather-resistant antibacterial adhesive and its preparation method. The preparation method comprises: reacting a zinc oxide / carbon nitride composite material with ethyl bromide, followed by further reaction with methyl iodide to obtain an antibacterial agent; mixing modified imidazole, pentaerythritol triacrylate, and hydroxyethyl methacrylate to obtain a modified acrylate monomer; reacting a polyurethane prepolymer with the modified acrylate monomer to obtain a modified polyurethane acrylate; and mixing the modified polyurethane acrylate, glycidyl methacrylate, trimethylolpropane triacrylate, acetone, an antibacterial agent, and a photoinitiator to obtain a weather-resistant antibacterial adhesive.

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 present disclosure provides a method to form 1,2-dibromoethane in an electrochemical reactor system. The electrochemical reactor system comprises an electrochemical cell having an anode, an anolyte, a cathode, a catholyte and a membrane, an anode compartment and a cathode compartment, wherein the anolyte is an aqueous solution comprising at least 20 mM bromide salt. The method comprises the steps of introducing carbon dioxide into the cathode compartment; applying a potential to the cathode, and allowing an electrochemical reaction to proceed forming reduction products at the cathode and oxidation products at the anode; and bringing the reduction products in contact with the oxidation products externally from the electrochemical cell and allowing the reduction products to react with the oxidation products to form 1,2-dibromoethane.

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 discloses a preparation method capable of improving the yield of trifluoroethylene, which comprises the following steps: in the presence of an organic solvent, mixing 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane, a metal dehalogenating agent and an activating agent for reaction, then cooling and dropwise adding water into the reaction system to obtain trifluoroethylene, the activating agent is 1, 2-dibromo-1, 2, 2-trifluoroethane, and the metal dehalogenating agent is 1, 2-dibromo-1, 2, 2-trifluoroethane. The catalyst is selected from at least one of 1, 2-dibromoethane, bromoethane and dichloroethane. An activating agent is added into a reaction system, the activating agent serves as an efficient initiator, the activating agent is heated to decompose and release free radicals, the free radicals reduce oxides on the surface of a metal dehalogenating agent, reaction active sites of the metal dehalogenating agent are exposed, reaction of 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane and the metal dehalogenating agent is facilitated, and the metal dehalogenating agent can be used for dehalogenating 1-chloro-1, 2-dibromo-1, 2, 2-trifluoroethane. Therefore, the conversion rate of the reaction is effectively improved, and the yield of trifluoroethylene is improved.

The invention belongs to the field of fluorine chemical industry, and particularly relates to a synthesis method of 1, 1, 1, 2, 2, 5, 5, 6, 6, 6-decafluoro-3-hexene. The preparation method comprises the following steps: 1, carrying out addition reaction on pentafluoro halogenated hydrocarbon such as pentafluoro iodoethane or pentafluoro bromoethane serving as a raw material and ethylene, carrying out dehydrohalogenation to obtain 3, 3, 4, 4, 4-pentafluoro butene, carrying out addition reaction on the 3, 3, 4, 4, 4-pentafluoro butene and the pentafluoro halogenated hydrocarbon, and carrying out dehydrohalogenation to obtain 1, 1, 1, 2, 2, 5, 5, 6, 6, 6-decafluoro-3-hexene. And the other method comprises the following steps of: reacting pentafluoro halogenated hydrocarbon serving as a raw material with acetylene to obtain 3, 4-dibromo (diiodo)-1, 1, 1, 2, 2, 5, 5, 6, 6, 6-decafluoro-hexane, and removing bromine or iodine to obtain 1, 1, 1, 2, 2, 5, 5, 6, 6, 6-decafluoro-3-hexene. The synthesis method provided by the invention has the advantages of easily available raw materials, simple operation, convenient purification and easy large-scale production.

The application provides an acrylic metal salt resin containing rosin and rosin-derived quaternary ammonium salt and a preparation method and application thereof, and relates to the technical field of organic polymer materials. The acrylic metal salt resin is prepared by the following preparation method: rosin, maleic anhydride, p-toluenesulfonic acid and acetic acid are mixed and heated to reflux to obtain maleopimaric acid; maleopimaric acid, alcohol and N, N-dimethylethylenediamine are mixed and heated to obtain a product precursor; the product precursor is mixed with tetrahydrofuran and bromoethane to obtain rosin-derived quaternary ammonium salt; acrylic ester monomers, acrylic acid and methacrylic acid are mixed to obtain a monomer mixture; the monomer mixture is mixed with an initiator, a solvent and a chain transfer agent to carry out polymerization and obtain a resin prepolymer; and then a metal-containing compound, rosin, a small-molecule organic acid, a solvent and rosin-derived quaternary ammonium salt are mixed to obtain the acrylic metal salt resin with antibacterial and anti-protein adsorption properties.

The invention relates to the technical field of ionic liquid, in particular to allyl flexible ionic liquid and a preparation method thereof. The name of the ionic liquid is 1-ethyl-4-allyl-1, 2, 4-triazolyl bromide, and the ionic liquid has a structural formula as shown in a formula (I) in the specification. The preparation method comprises the following steps: slowly adding 1, 2, 4-triazole and sodium methoxide into methanol, dropwise adding bromoethane, reacting, filtering, washing, carrying out rotary evaporation, and removing impurities; distilling and collecting a middle fraction, enabling the middle fraction to react with bromopropene, and performing rotary evaporation, washing and filtering to obtain 1-ethyl-4-allyl-1, 2, 4-triazolyl bromide; and carrying out vacuum drying to obtain the purified-1-ethyl-4-allyl-1, 2, 4-triazolyl bromine salt, and carrying out vacuum drying on the purified-1-ethyl-4-allyl-1, 2, 4-triazolyl bromine salt. (I)

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.