73 results about "Bromoethane" patented technology

The invention discloses an ethylene chain-based ferrocenyl covalent organic polymer and application thereof, and belongs to the technical field of biological medicines. The covalent organic polymer based on the ethylene chain ferrocenyl is a covalent organic polymer which is obtained by taking 1, 1 '-ferrocenedicarboxaldehyde, bromoethane and 2, 4, 6-trimethyl-1, 3, 5-triazine as monomers through polymerization and has a completely conjugated structure. The method comprises the following steps: adding 1, 1 '-ferrocenedicarboxaldehyde, bromoethane and 2, 4, 6-trimethyl-1, 3, 5-triazine into a mixed solvent under a protective atmosphere, uniformly stirring, carrying out solvothermal reaction in a closed environment, and washing and drying a product obtained by filtering to obtain the covalent organic polymer based on ethylene chain ferrocenyl. The novel COP material ITAFc-COP with a completely conjugated structure is synthesized, the photo-thermal activity of the novel COP material ITAFc-COP is enhanced by the completely conjugated structure of ITAFc-COP, and the novel COP material has a photo-thermal effect and pod-like activity at the same time.

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 belongs to the technical field of drilling fluid additives for petroleum drilling, and discloses a heat-resistant water-based drilling fluid additive as well as a preparation method and application thereof. The water-resistant water-based drilling fluid additive is a high-molecular compound which is formed by taking water as a solvent, dissolving animal bone glue to form a glue solution, and performing etherification reaction on the glue solution and bromoethane under the action of a chain transfer agent and a base catalyst. The preparation method comprises the following steps: adding animal bone glue into water, dissolving to obtain a glue solution, sequentially adding sodium hydroxide, sodium carbonate and bromoethane to form a reaction system solution, then adding a chain transfer agent, and heating and refluxing to react to obtain the water-resistant water-based drilling fluid additive. According to the prepared bromoethane modified bone glue, the chain transfer agent is added in the modification process, the technical defect that the molecular weight of the bone glue cannot be manually controlled is overcome, the inhibition effect is obvious, meanwhile, the rheological property of drilling fluid is not affected, and the problems of borehole wall instability and the like caused by shale hydration expansion in the drilling process can be effectively solved.

The invention provides an instant terpolymer emulsion type fracturing fluid thickening agent and a preparation method thereof, and relates to the field of oil and gas exploitation. The preparation method comprises the following steps: reacting chloropropene with N, N, N '-trimethyl ethylenediamine to prepare N, N, N'-trimethyl-N '-allyl ethylenediamine (TMPEMA), and reacting TMPEMA with bromoethane to prepare the (N, N, N-trimethyl-N'-allyl-N ', N'-dimethyl)-ethyl ammonium dibromide functional monomer. The preparation method comprises the following steps: preparing a monomer solution as a water phase from acrylamide, sodium p-styrenesulfonate and a functional monomer, slowly dropwise adding the water phase into an oil phase by taking an emulsifier and liquid paraffin as the oil phase, introducing N2, uniformly stirring, dropwise adding an initiator, and carrying out inverse emulsion polymerization to prepare the fracturing fluid thickening agent. The ternary polymerization fracturing fluid thickening agent has excellent tackifying performance, instant dissolving capability, salt resistance, temperature resistance and shearing resistance. The prepared fracturing fluid has good viscoelasticity, gel breaking property, sand carrying property, filtrate loss reduction property and the like, can be used as slick water when the concentration is low, can be used as sand carrying fluid when the concentration is high, and has a good application prospect in offshore and shale oil and gas development.

The invention provides a preparation process for producing mixed dibasic acid dimethyl ester by using ionic liquid as a catalyst, which belongs to the technical field of fine chemical engineering, and comprises the following steps: S1, dissolving carbazole in anhydrous acetonitrile, adding bromoethane, reacting, then carrying out rotary evaporation, washing and precipitating, dissolving the precipitate in ethanol, then adding a LiHSO4 solution for ion exchange, centrifuging, and then carrying out vacuum drying to obtain mixed dibasic acid dimethyl ester; the carbazolyl ionic liquid catalyst is obtained; and S2, adding the carbazolyl ionic liquid catalyst, mixed binary acid and methanol into a pre-reactor, reacting to obtain a pre-reaction solution, feeding the pre-reaction solution into an extraction tower, adding an ionic liquid-methanol mixed solution, carrying out countercurrent reaction-extraction to obtain a light-phase product from the top of the extraction tower, carrying out silica gel adsorption, feeding the light-phase product into a rectifying tower, and removing methanol to obtain the carbazolyl ionic liquid. And stirring, adsorbing and filtering to obtain the mixed dibasic acid dimethyl ester. According to the invention, the purposes of high product purity, production process optimization and cost reduction can be achieved.

The invention relates to the technical field of hydraulic transmission media, and discloses a formula and a preparation method of an emulsified oil concentrated solution for a multifunctional hydraulic support. Hexadecanedioic acid and N-(4-methoxyphenyl) ethylenediamine are used as raw materials, 2-bromoethane sodium sulfonate is used as a quaternization reagent, hydroxyl in the structure of the quaternization reagent and epoxy groups of epoxidized soybean oil are utilized to generate chemical bonding, and the emulsified oil concentrated solution for the multifunctional hydraulic support is prepared. The emulsified oil is compounded with organic alcohol amine, fatty acid and the like to obtain a formula of the emulsified oil concentrated solution for the multifunctional hydraulic support, which is good in dispersing performance, high in corrosion inhibition capability and high in extrusion wear resistance; the vegetable oil-based hard water-resistant corrosion inhibitor contains bicyclic imidazoline and quaternary ammonium salt structures, so that a compact physical and chemical adsorption film can be formed on the surface of metal; a sodium sulfonate group can be complexed with ions such as calcium and magnesium in hard water, so that the stability in the hard water is enhanced, and the hard water resistance is improved; the concentrated solution prepared by the invention is non-toxic and environment-friendly, and can meet the use of the hydraulic support under harsh working conditions.

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 discloses a quinazoline-4-one compound containing 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole, a preparation method thereof and antibacterial activity thereof. The compound is represented by general formula (I), and quinazoline-4-one, 1,2-dibromoethane, methyl 4-piperidinate, 80% hydrazine hydrate, potassium hydroxide, carbon disulfide and different aromatic acids are used as raw materials to prepare the target compound through a five-step reaction. The invention introduces an active 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole unit into the quinazoline-4-one structure, and synthesizes a series of quinazoline-4-one compounds containing 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole units, and the compounds have good antibacterial activity.

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 fluxapyroxad, and belongs to the field of fluxapyroxad preparation.The preparation method comprises the following steps that S1, under the protection of nitrogen, o-dichlorobenzene and magnesium metal react in an organic solvent under the co-initiation action of elemental iodine and bromoethane, and o-chlorophenyl magnesium chloride is obtained; s2, under the protection of nitrogen, adding 3, 4, 5-trifluorobromobenzene and a catalyst into an organic solvent, heating, dropwise adding the o-chlorphenyl magnesium chloride prepared in the step S1 at a constant temperature, stirring at a constant temperature after dropwise adding, and rectifying and purifying to obtain 2 '-chloro-3, 4, 5-trifluorobiphenyl; s3, in an alkali system, under the catalytic action of copper salt, 2 '-chloro-3, 4, 5-trifluorobiphenyl prepared in the step S2 and 1-methyl-3-difluoromethyl-1H-pyrazole-4-amide react in an organic solvent, and fluxapyroxad is obtained.The method avoids using expensive palladium metal, is low in cost, few in three wastes and environmentally friendly.

The invention belongs to the technical field of organosilicon compounds, and particularly relates to a method for preparing 4-trimethoxysilyl styrene and application of the 4-trimethoxysilyl styrene. The preparation method comprises the following steps: taking 4-iodobenzene ethane and trimethoxysilane as raw materials, and carrying out a coupling reaction to synthesize 4-trimethoxysilyl phenyl ethane; the preparation method comprises the following steps: reacting 4-trimethoxysilyl phenyl ethane with NBS (N-bromosuccinimide), and synthesizing 4-trimethoxysilyl phenyl bromoethane through a free radical bromination reaction; and carrying out hydrogen bromide removal on the 4-trimethoxysilyl phenyl bromoethane, so as to prepare the 4-trimethoxysilyl styrene. According to the application, (1) the 4-trimethoxysilyl styrene is used as a modifier, and (2) the 4-trimethoxysilyl styrene is applied to preparation of a resin compound; and (3) the 4-trimethoxysilyl styrene can improve the adhesive force between the heat-resistant resin and the substrate. According to the invention, the 4-trimethoxysilyl styrene is successfully prepared through different inventive concepts and new routes, so that more possibilities for synthesizing the compound are given, and the yield is also improved.

The invention discloses a pseudo-boehmite with strong adsorption performance and a preparation method thereof, and belongs to the technical field of pseudo-boehmite preparation. The pseudo-boehmite with strong adsorption performance is composed of the following components in parts by weight: 28-33 parts of aluminum sulfate, 55-68 parts of sodium aluminate, 3-5 parts of pore expanders, and 2-4 parts of imidazole-based dispersants, wherein the pore expander is obtained by reacting β-cyclodextrin, maleic acid and acrylic acid, and the imidazole-based dispersant is obtained by reacting imidazole, 1,2-dibromoethane and 1-bromopentadecane. By adding the pore expander and the imidazole dispersant during the preparation process, the purity, specific surface area, pore volume and adsorption performance of the pseudo-boehmite can be effectively improved.

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 discloses a separation and purification device for tetrabromoethane production, and relates to the technical field of tetrabromoethane production equipment.The separation and purification device comprises a distillation mechanism, a separation mechanism, a condensation mechanism and a collection mechanism, the separation mechanism comprises a separation box, a movable sliding seat, a movable sliding frame and an activated carbon plate, and an air inlet groove communicated with an exhaust port is formed in the bottom of the separation box; a first sliding groove is formed in the inner side of the separation box, the movable sliding base is connected with the first sliding groove in a sliding fit mode, the bottom of the movable sliding frame abuts against the top of the air inlet groove, the side portion of the movable sliding frame is fixedly connected with the movable sliding base, and the activated carbon plate is arranged in the movable sliding frame. And the steam uniformly passes through each area of the activated carbon plate. Therefore, the activated carbon can give full play to the adsorption performance, pigments, peculiar smell and various impurity gases in the steam are continuously and efficiently removed, and the separation and purification degree of the tetrabromoethane steam is greatly improved, so that the high stability of the product quality is ensured.

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 invention discloses a cationic surfactant and its preparation and application. The structure of the cationic surfactant is: #imgabs0# A method for preparing the cationic surfactant comprises: (1) reacting dehydroabietic acid with thionyl chloride under the catalysis of 4-dimethylaminopyridine to obtain dehydroabietic acid chloride; (2) reacting dehydroabietic acid chloride with aminoundecanoic acid methyl ester hydrochloride to obtain compound 1; (3) reacting compound 1 with 3-dimethylaminopropylamine to obtain compound 2; and (4) reacting compound 2 with ethyl bromide to obtain the cationic surfactant. The cationic surfactant provided by the present invention can have high viscoelasticity at a relatively low concentration and has low application cost.

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 invention provides acrylic acid metal salt resin containing rosin and rosin derivative quaternary ammonium salt as well as a preparation method and application thereof, and relates to the technical field of organic polymer materials. The acrylic acid metal salt resin is prepared by the following preparation method: rosin, maleic anhydride, p-toluenesulfonic acid and acetic acid are mixed, heated and subjected to reflux reaction to obtain maleopimaric acid; the preparation method comprises the following steps: mixing maleopimaric acid, alcohol and N, N-dimethylethylenediamine, and heating to obtain a product precursor; mixing and reacting the product precursor with tetrahydrofuran and bromoethane to obtain rosin-derived quaternary ammonium salt; the preparation method comprises the following steps: mixing an acrylate monomer, acrylic acid and methacrylic acid to obtain a monomer mixture, and mixing the monomer mixture with an initiator, a solvent and a chain transfer agent for polymerization to obtain a resin prepolymer; and adding a metal-containing compound, rosin, small-molecular organic acid, a solvent and rosin-derived quaternary ammonium salt, mixing and reacting to obtain the acrylic acid metal salt resin with antibacterial and anti-protein adsorption properties.

The invention belongs to the technical field of lithium metal battery electrolyte, and provides low-volatility electrolyte suitable for a high-temperature and high-capacity lithium battery and a preparation method of the low-volatility electrolyte. Firstly, 1-ethylimidazole is prepared through an alkylation reaction of imidazole and bromoethane and further reacts with 3, 3, 3-trifluoropropyl bromide and 2-chloroethanol methyl ether, a trifluorogroup and an ether group structure are combined in the molecular design of the ionic liquid, and the vapor pressure of an electrolyte is reduced by introducing the trifluorogroup, so that the volatility under a high-temperature condition is inhibited, and the performance of the electrolyte is improved. Oxygen atoms in ethanol methyl ether groups react with metal lithium to generate stable lithium alkoxide, so that a compact and stable solid electrolyte interface film can be formed on the surface of the negative electrode; secondly, the sulfonic acid group can promote the formation of a high-quality solid electrolyte interface film on the surface of the negative electrode through strong interaction with lithium ions, so that the growth of lithium dendrites is inhibited, and the phosphate group inhibits electrolyte decomposition under a high-temperature condition through the chemical stability of the phosphate group.