37 results about "Ethylamine" patented technology

The preparation method comprises the following steps: adding polytetrahydrofuran ether glycol, polycaprolactone glycol, isocyanate and dibutyltin dilaurate into a flask, respectively inserting a thermometer, a glass plug, a stirring paddle and a nitrogen tube into a flask opening, heating to 80-85 DEG C, reacting for 1-2 hours, adding a charring agent into the flask, reacting for 1.5-2.5 hours, and cooling to room temperature to obtain the flame-retardant washable melt-drop-resistant polyurethane coating. A polyurethane prepolymer is obtained; cooling the polyurethane prepolymer to 45-55 DEG C, adding 2, 2-dimethylolpropionic acid, reacting for 1-2 hours, adding the porous carbon layer modifier and the glucose modifier, reacting for 1-2 hours at 65-70 DEG C, adding triethylamine, and reacting for 1-2 hours; and cooling to normal temperature, adding water, stirring and reacting for 1-2 hours, and adjusting the pH value of the system to 7-8 to obtain the flame-retardant washable melt-drop-resistant water-based polyurethane coating which has good flame-retardant, washable and melt-drop-resistant properties and the like.

The invention relates to the field of organic chemistry, and particularly discloses a synthetic method of berberine hydrochloride. The synthesis method of berberine hydrochloride comprises the following steps: S1, carrying out reductive amination reaction on bromohomopiperony lamine and o-veratraldehyde to synthesize an intermediate II; s2, carrying out Suzuki coupling reaction on the intermediate II and an organic boron compound under the catalysis of a palladium metal organic matter to synthesize an intermediate III; s3, the intermediate III and organic chloride are subjected to an amino chlorination reaction, and an intermediate IV is synthesized; s4, carrying out intramolecular atom transfer radical addition and intramolecular Friedel-Crafts alkylation cascade reaction on the intermediate IV in a mixed solvent under the catalysis of a copper catalyst to synthesize an intermediate V; and S5, carrying out oxidative aromatization reaction on the intermediate V and iodine under the catalysis of alkali to synthesize berberine hydrochloride. The synthesis process is simpler, reaction conditions are easier to control, the yield is high, and the method is suitable for industrial production.

A problem to be addressed by the present invention is to provide a carbon fiber bundle capable of efficiently transiting the tensile strength of the fiber to a carbon fiber-reinforced composite material formed using the carbon fiber bundle, the carbon fiber bundle including a sizing agent added thereto, wherein the tensile strength of resin-impregnated strands (tensile strength A' of resin-impregnated strands) of the carbon fiber bundle is 5.0 GPa or more and 6.0 GPa or less, as evaluated on the basis of JIS R7608 (2007) using Resin Formulation A below; wherein the tensile strength of resin-impregnated strands (tensile strength B' of resin-impregnated strands) of the carbon fiber bundle is 4.7 GPa or more and 5.5 GPa or less, as evaluated on the basis of JIS R7608 (2007) using Resin Formulation B below; wherein the ratio of the tensile strength B' of resin-impregnated strands to the tensile strength A' of resin-impregnated strands is 85% or more; and wherein the single-fiber diameter of the carbon fiber bundle is 6.0 µm or more; Resin Formulation A: "CELLOXIDE (registered trademark)" 2021P, boron trifluoride monoethyl amine, and acetone are used at a ratio of 100:3:4 (parts by mass), and the curing conditions of a normal pressure, a temperature of 125°C, and a time of 30 minutes are used; and Resin Formulation B: "JER (registered trademark)" 828, dicyandiamide, and 3-(3,4-dichlorophenyl)-1,1-dimethylurea are used at a ratio of 100:6.3:2 (parts by mass), and the curing conditions of a normal pressure, a temperature of 130°C, and a time of 90 minutes are used.

The invention discloses a method for manufacturing a core rod of a composite insulator without grinding. The core rod raw materials include a sizing material and glass fiber. The sizing material includes, by mass ratio, 100 parts of epoxy resin, 75-85 parts of curing agent, 1.5-2 parts of accelerator, 0.5-2 parts of coupling agent and 1-2 parts of internal mold release agent; the internal mold release agent contains a combination of fatty alcohol-C12-15-polyoxyethylene ether, 2,2',2"-trihydroxytriethylamine and tetraphosphoric acid; the coupling agent is BYK-C8001; the sizing material and the glass fiber are formed by a mold. After molding and curing, the bonding surface of the core rod is cleaned without polishing, and then an organic polysiloxane adhesive is applied to the bonding surface, and then dried; finally, a protective sleeve is coated on the bonding surface of the core rod by injection or extrusion molding. The core rod of the present invention does not need to be polished after molding, which saves time and labor, and has no dust pollution; compared with the polished core rod, the core rod can maintain the shape stability after molding after being polished, thereby ensuring the interface connection strength between the core rod and the hardware, and improving the quality stability of the composite insulator; and the core rod can be stored for a long time.

The invention belongs to the field of microbial genetic engineering, and particularly relates to a saccharomyces cerevisiae engineering bacterium for producing cinnamyl alcohol as well as a construction method and application of the saccharomyces cerevisiae engineering bacterium. The recombinant saccharomyces cerevisiae comprises a phenylalanine ammonia lyase gene Arval derived from anoectochilus roxburghii, a phosphopantetheine ethylamine phosphotransferase gene Bssfp derived from bacillus subtilis, and a reductase gene Nicar derived from nocardia aralgarica, or a reductase gene Nicar of nocardia otitis media, or a carboxylic acid reductase gene Mpar of mycobacterium phlei. According to the invention, the total synthesis of cinnamyl alcohol in the saccharomyces cerevisiae is realized for the first time, and the cinnamyl alcohol produced by using the recombinant saccharomyces cerevisiae can reach 30.30 mg / L.

The invention relates to the field of textile printing materials, and discloses a preparation method of water-based digital printing bottoming white adhesive cement, which comprises the following steps: mixing water-based acrylate emulsion with an auxiliary agent and a macromolecular quaternary ammonium salt color fixing agent to obtain a premix; mixing the premix with filling powder to obtain dispersion liquid; and adding a curing agent and a thickening agent into the dispersion liquid and mixing. The macromolecular quaternary ammonium salt color fixing agent is prepared by reacting an organic silicon modified allylamino phosphorus-containing bromine substituent and bis (dimethylamino) phosphoric acid hydrogenated cardanol ester; the organic silicon modified allylamine phosphorus-containing bromine substituent is prepared by preparing the allylamine phosphorus-containing bromine substituent from allylamine, phenyl dichlorophosphate and 2-bromoethylamine hydrobromide as raw materials and then reacting the allylamine phosphorus-containing bromine substituent with heptamethyltrisiloxane. The white rubber cement prepared by the preparation method is bright in color and clear in pattern, can be recycled and reused, and has the advantages that the white rubber cement is easy to prepare, the cost is low, and the application prospect is wide. The color fixing fastness, the flame-retardant and fire-proof performance, the net blocking prevention performance and the hand feeling comfort degree are good.

This invention discloses a room-temperature phase pyroelectric material and its preparation method, relating to the field of pyroelectric material technology, with the chemical formula C4H. 14 N₂OPbCl₄ is prepared as follows: 2-Dimethylaminoethylamine is cooled and stirred in an ice-water bath, then hydrogen peroxide solution is added dropwise while stirring. After the reaction, the resulting reaction solution is vacuum dried to obtain the nitrogen oxide of 2-dimethylaminoethylamine. The nitrogen oxide of 2-dimethylaminoethylamine and lead chloride are added to a concentrated hydrochloric acid solution, heated in an oil bath, and stirred to obtain a pyroelectric material. The pyroelectric material of this invention has a perovskite structure and undergoes a reversible phase transition reaction at a phase transition temperature of 27°C. During the phase transition, a current is generated at the polar axis of the crystal. The phase transition temperature at room temperature allows the pyroelectric material to operate within a relatively stable temperature range, providing reliable energy collection performance and showing great application value in waste heat utilization, self-sustaining systems, and other fields.

The present invention belongs to the technical field of gas adsorption and separation, and specifically relates to an adsorbent, an application method and a mosquito trap for capturing carbon dioxide from an air flow or an industrial air flow. The adsorbent is prepared by the following steps: (1) using methyl ethyl ketone as a reaction solvent, adding a platinum / alumina catalyst, reacting anhydrous cycloethylamine and phenyl monochlorosilane, removing 10-15wt% of the feed liquid by vacuum distillation, and filtering; (2) treating the formed γ-alumina, silica gel or hydrogen-type 13X molecular sieve carrier at 160-180°C, transferring it to a rotary drum while hot, replacing it with nitrogen and cooling it, filling it with ammonia, spraying the filtrate of step (1) on the carrier, standing it, and then spraying a methyl ethyl ketone solution containing 3-5wt% of methyltrichlorosilane, filling it with ammonia, standing it; washing, and obtaining the adsorbent. The adsorbent is a supported amine adsorbent grafted with a short-chain primary amine, which is used in a fixed bed and TVSA, TSA, VSA mode, can capture carbon dioxide with high efficiency, and has application prospects.

The invention discloses polyurethane coated diethyl aminoethyl hexanoate sustained release microspheres and a preparation method and application thereof. The preparation method comprises the following steps: dissolving diethyl aminoethyl hexanoate with ethyl acetate, adding isophorone diisocyanate, and uniformly mixing to obtain an oil phase; mixing an emulsifier and a polyvinyl alcohol aqueous solution to form a water phase; homogenizing and emulsifying the water phase at normal temperature, and dropwise adding the oil phase while homogenizing and emulsifying to prepare a homogenized and emulsified oil-water emulsified stock solution; dropwise adding a triethanolamine aqueous solution into the oil-water emulsified stock solution in a stirring state, and carrying out a curing reaction; and taking out the reaction liquid, centrifuging, removing the supernatant, and cleaning the precipitate to obtain the polyurethane-coated diethyl aminoethyl hexanoate sustained-release microspheres. A water-in-oil emulsion is prepared on the surface of the diethyl aminoethyl hexanoate through an interfacial polymerization method, the dissolvability, stability and absorbability of the diethyl aminoethyl hexanoate are improved, meanwhile, a polyurethane shell material is formed, and the diethyl aminoethyl hexanoate has the characteristics of low-speed, lasting and slow release of content, reduction of environmental toxicity and the like.

The present invention discloses an antibacterial compound of Formula 1 or pharmaceutically acceptable salt thereof:wherein X is CH, S, CH—NH2;R1 is C1-C8 alkyl, substituted alkyl, alkyl amine, substituted amine; preferably R1 is methyl, ethyl, propyl, butyl, pentyl, isopropyl, isobutyl, methyl amine, ethylamine, propylamine, isopropyl amine, isobutylamine, N-ethylprop-2-yn-1-amine, N-isopropyl propane-1,3-diamine, N1-isopropyl ethane-1,3-diamine, 1-butyl-2-methylguanidine, N1-ethyl-N1-propylethane-1,2-diamine, cyclobutyamine, phosphate, sulphate;R2 is hydrogen, alkyl, substituted alkyl; preferably R2 is methyl, propyl, isopropyl;R3 is hydrogen, alkyl, substituted alkyl; and preferably R3 is methyl, propyl, isopropyl.The Formula 1 or pharmaceutically acceptable salt thereof is an imidazole glycerol phosphate dehydratase (IGPD) inhibitor and treats or prevents or ameliorates tuberculosis.

The invention belongs to the technical field of HO-EPCP synthesis, and particularly relates to a method for catalytically synthesizing HO-EPCP through DMAP. The method for catalytic synthesis of HO-EPCP by DMAP comprises the following steps: taking 4-ethyl-2, 3-dioxypiperazine and triphosgene as raw materials, and obtaining 4-ethyl-2, 3-dioxypiperazine acyl chloride in the presence of triethylamine and trimethylsilane; the preparation method comprises the following steps: by taking p-hydroxyphenylglycine and trimethylchlorosilane as raw materials and triethylamine as an acid-binding agent, obtaining silanized p-hydroxyphenylglycine; and carrying out a reaction on the silanized p-hydroxyphenylglycine and 4-ethyl-2, 3-dioxypiperazine acyl chloride under the catalysis of DMAP, and refining to obtain the finished product HO-EPCP. The method for catalytically synthesizing HO-EPCP by DMAP has the advantages of mild reaction conditions, higher reaction yield and product purity under the condition of lower catalyst dosage, higher reaction rate and greatly saved cost.

The invention relates to the technical field of epoxy resin synthesis, in particular to halogen-free flame-retardant epoxy resin and a preparation method thereof. According to the invention, the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, the N-tert-butyl acrylamide, the tetramethylpiperidine nitroxide free radical phosphorous acid triester, the triethylamine, the tetrahydrofuran and the phenethyl trichlorosilane are added, so that the flame retardant is prepared. Anhydrous magnesium sulfate, aluminum sulfate octadecahydrate, sodium hydroxide, anhydrous sodium carbonate, a flame retardant and deionized water are used as raw materials, and the composite flame retardant is prepared. The preparation method comprises the following steps: carrying out high-temperature mechanical blending on epoxy resin and the composite flame retardant, then adding 4, 4 '-diaminodiphenylmethane, and carrying out vacuum degassing and stepped curing to prepare a finished product. The finished product prepared by the invention has good flame retardance and environment-friendly effect, so that the finished product has a wide application prospect in the technical field of epoxy resin synthesis.

The invention discloses a preparation method of deep-color isopropyl ethyl thiamine ester, which comprises the following steps: taking 200g of isopropyl ethyl thiamine ester base material, adding 5g of 8% hydrogen peroxide (the effective HO accounts for 0.2%) under the stirring conditions of 35 DEG C and 250rpm, stirring for 10 minutes, adding 0.3-3.4 g of 70% monoethylamine, and reacting at constant temperature for 30 minutes to obtain a deep-color isopropyl ethyl thiamine ester product. According to the method, continuous controllable change of the color of the thiamine ester from light red yellow to dark red brown is realized by accurately controlling the ratio and the reaction condition at 35 DEG C, the deviation of the main peak of the product chromatography is less than or equal to 0.5%, layering and precipitation are avoided after standing in a dark place for 8 hours, the loss of main components is extremely low, the process stability is high, and the method is suitable for industrial production.

The present application relates to a kind of preparation methods of pethoxamid, comprising the following steps: isobutyryl benzene and 2-ethoxyethylamine are reacted, and intermediate 2 is obtained;Then intermediate 2, chloroacetyl chloride, organic solvent are reacted, after reaction, separation is carried out, and pethoxamid pure product is obtained.Belong to the technical field of pesticide chemical engineering.The present application uses continuous flow tubular reactor in step 1, preferred catalyst, good catalytic effect, short reaction time, high reaction efficiency;In step 2, continuous flow microchannel reactor is used, the yield of product obtained is high and high purity, high safety, high reaction efficiency, with good application prospect.

The invention discloses a production process of a high-strength steel wire rope core flame-retardant conveying belt for a mine, which comprises the following steps: adding PVC master batch, modified filler, a reinforcing agent and benzoyl peroxide into an internal mixer, carrying out internal mixing treatment to obtain pretreated PVC, adding the pretreated PVC and a boron trifluoride-monoethylamine complex into a double-screw extruder, extruding, placing on the surface of a modified conveying belt core, and carrying out extrusion molding to obtain the high-strength steel wire rope core flame-retardant conveying belt for the mine. According to the present invention, the conveying belt can produce phosphoric acid, metaphosphoric acid and polyphosphoric acid during combustion, the organic silicon can produce a large amount of Si-O bonds and Si-C bonds so as to form the compact silicon-carbon layer, and the porous foam rubber carbon layer containing the metal oxide and produced by the composite charcoal is arranged in the silicon-carbon layer so as to form the porous foam rubber carbon layer; the carbon layer on the surface of the conveying belt has a good heat insulation effect, combustible gas is prevented from entering the conveying belt, release of smoke is reduced, and therefore the use safety of the conveying belt is improved.

The invention discloses a preparation method of difluoroethylamine, and relates to the technical field of chemical synthesis. The method comprises the following steps: S1, preparing a catalyst: preparing the catalyst by taking one of aluminum oxide, activated carbon and silicon dioxide as a carrier, taking one of ammonium iodide, sodium iodide and potassium iodide as a main active component and taking nickel nitrate, magnesium nitrate and copper nitrate as auxiliary catalytic components; s2, filling the fixed bed reactor with a catalyst; s3, introducing difluorochloroethane and ammonia water into the fixed bed reactor; and S4, difluorochloroethane and ammonia water react under the action of the catalyst to generate difluoroethylamine and a byproduct, difluoroethylamine is led out from the lower part of the reactor and is cooled and collected by a cold trap, and non-condensable gas is guided to a tail gas treatment system after being absorbed by water. The method has the advantages of mild reaction conditions, simple reaction equipment and easy operation conditions, and can be used for synthesizing difluoroethylamine under continuous conditions. The method has the advantages of low cost, simple post-treatment, less three-waste generation, high product yield and easiness in industrial large-scale production.

A composition which conditions a surface for electroless deposition of a metal is disclosed. The composition comprises a polymer surfactant comprising repeating units of a monomer, wherein each of the repeating units comprises a functional group; a metal ion; and water, wherein the functional group in each of the repeating units forms a complex with the metal ion. In a preferred embodiment, the functional group is amine, and the surfactant comprises polyethyleneimine and / or polyallylamine. The metal ion comprises cobalt, rhodium, palladium or silver. A method of forming the composition as well as a method of electroless deposition using the composition are also disclosed.

The invention provides a single-component heat-aging-resistant heat-conducting silica gel and a preparation method thereof. The single-component heat-aging-resistant heat-conducting silica gel is prepared from the following raw materials in parts by weight: 70 to 80 parts of vinyl-terminated silicone oil, 8 to 10 parts of hydrogen-terminated silicone oil, 0.3 to 0.5 part of octavinyl silsesquioxane, 10 to 15 parts of epoxy-terminated silicone oil, 3 to 5 parts of ellagic acid, 0.01 to 0.03 part of triethylamine, 0.5 to 3 parts of catalyst, 0.1 to 2 parts of inhibitor and 500 to 800 parts of heat-conducting filler, wherein the epoxy value of the epoxy-terminated silicone oil is 0.1 to 0.3 mol / 100g; the epoxy-terminated silicone oil is polydimethylsiloxane of which the terminal group contains an epoxy group. Octavinyl silsesquioxane is utilized to change the structure of a part of crosslinking points of silica gel, the heat resistance of the silica gel is improved, in addition, epoxy-terminated silicone oil and ellagic acid are crosslinked and cured under the catalytic action of triethylamine when the silica gel is cured at high temperature, and the heat aging resistance can be further improved.

The present invention belongs to the technical field of microbial fermentation in the light industry, and discloses a method for producing L-theanine by fermentation, which mainly includes: accessing a microbial strain to a seed culture medium for cultivation, and obtaining a seed solution by controlling the culture conditions; inoculating the seed solution into a fermentation tank by a shake flask inoculation method for fermentation, and adding ethylamine in batches and adding sugar during the fermentation process to obtain a high-acid fermentation liquid. The present invention has high fermentation efficiency, low investment cost, and accurately controls the fermentation process to avoid fermentation out of control and cost increase, while reducing labor intensity, and the entire production process is simple and easy to operate.

The application provides a kind of floatation reagent and its preparation method, relate to mineral processing technical field.A kind of floatation reagent, including the following weight parts raw materials:ethylamine 2-3 parts, medium long carbon chain fatty amine 3-4 parts, fatty acid salt 2-3 parts, diesel oil 0.5-1 part.The floatation reagent prepared by the application has significantly higher selectivity to feldspar than quartz, can realize the floatation separation of feldspar and quartz under neutral conditions, effectively alleviates the problem of environmental pressure caused by the separation of feldspar and quartz under strong acid and strong base conditions in existing research.

The present invention provides a method for co-producing ammonia, amine compounds and hydrogen by plasma catalytic conversion of methane and nitrogen, which involves the activation of nitrogen and methane molecules. Specifically, this method is to apply an alternating current in a mixed gas of methane and nitrogen under the condition of filling a catalytic material to excite a low-temperature plasma, so as to realize the method for co-producing ammonia, amine compounds and hydrogen by the conversion of methane and nitrogen. This method directly utilizes the synergistic effect of the low-temperature plasma and the catalytic material at near room temperature and atmospheric pressure to achieve the efficient activation and directional conversion of nitrogen and methane. In a fixed-bed plasma reactor, the single-pass conversion rate of nitrogen is as high as 3.5%, the conversion rate of methane is 50%, the selectivity of ammonia is 84%, and the total selectivity of methylamine and ethylamine is as high as 16%. The advantages of the present invention are that the preparation process of the catalyst adopted is simple and controllable, the reaction equipment is simple and easy to be scaled up industrially, and the co-production of hydrogen, ammonia and amine compounds is directly realized by using methane and nitrogen under the conditions of atmospheric pressure and near room temperature.

The invention relates to the technical field of fluororubber, and discloses a solvent-resistant flame-retardant fluororubber material and a preparation process thereof. The fluororubber material comprises the following raw materials: 90-110 parts of fluororubber, 30-40 parts of silicon fluoride rubber, 20-25 parts of a flame-retardant filler, 5-8 parts of a plasticizer, 2-3 parts of a vulcanizing agent and 1-2 parts of triallyl isocyanurate. The preparation method of the plasticizer comprises the following steps: adding 2, 2, 2-trifluoroethylamine into epoxidized soybean oil, heating to 80-85 DEG C, and stirring to react for 6-8 hours to obtain the plasticizer; the preparation method of the flame-retardant filler comprises the following steps: coating aluminum hydroxide with epoxy silane coupling agent modified silicon dioxide to obtain epoxy modified composite filler; and 2, 2, 2-trifluoroethylamine is used for modification, such that the flame-retardant filler is obtained. The prepared fluororubber material has excellent mechanical properties and toughness, and also has excellent flame retardance.

The invention relates to the technical field of chemical engineering, in particular to a production process of N-ethyl-3-carbamoyl-4-methyl-6-hydroxy-2-pyridone, which comprises the following steps: S1, condensation ring closure; s2, separation and purification; s3, hydrolyzing, diluting and centrifuging; and S4, recovery of concentrated sulfuric acid. The method has the advantages that the preparation process can be continuous and environment-friendly, the cost of raw materials can be greatly reduced, the sulfuric acid and the monoethylamine are recycled, and the byproduct ethanol is produced.

The invention relates to the technical field of concrete admixtures, and in particular to a viscosity-reducing polycarboxylate water-reducing agent and a preparation method thereof. The viscosity-reducing polycarboxylate water-reducing agent comprises, by weight, 90-110 parts of a homemade polycarboxylate water-reducing agent mother solution, 27-45 parts of modified graphene oxide, 0.3-0.6 parts of a foam stabilizer, 1.1-1.9 parts of a defoamer, and 280-320 parts of water. The invention modifies graphene oxide by N,N-dimethyl-2-hydroxyethylamine, so that the graphene oxide has better interlayer friction performance and more active sites. The invention introduces 1-(4-bromobutyl)-pyrene on the surface of the polycarboxylate water-reducing agent with a network structure, so as to improve its dispersibility and thus reduce the viscosity of concrete.

To provide a triethylenetetramine tetrahydrochloride crystal.SOLUTION: The present invention includes a step of adding a poor solvent into an aqueous solution of triethylenetetramine tetrahydrochloride at a feeding temperature and stirring to precipitate crystals, wherein the feeding temperature ranges from 50°C to 75°C and the poor solvent is an alcohol solvent. The present invention also provides a novel triethylenetetramine tetrahydrochloride. The crystal thereof has an XRPD pattern with peaks at 2θ of 21.9, 24.8, 25.2, 28.0 and 35.6±0.1°. Compositions prepared using the triethylenetetramine tetrahydrochloride of the present invention have the advantage of storage stability.SELECTED DRAWING: Figure 3

The invention discloses a method for preparing trifluoroethylamine through continuous ammonolysis by using a microchannel method. The method comprises the following steps: (1) mixing chlorotrifluoroethane with an organic solvent I to obtain an A-phase solution; mixing ammonia gas, a surfactant and an organic solvent II to obtain a B-phase solution; and (2) simultaneously feeding the A-phase solution and the B-phase solution into a micro-channel reactor according to a certain flow rate, heating to 50-110 DEG C, and carrying out ammonolysis reaction to obtain trifluoroethylamine. According to the preparation method disclosed by the invention, the high conversion rate of the substrate and the high selectivity and high yield of the target product can be ensured, the preparation process is simple in condition and short in time consumption, the prepared TFEA refined product is more convenient to realize industrial production.

The invention discloses a method for preparing cimetidine. The compound of formula I or formula II is reacted with 2-(((4-methyl-1H-imidazole-5-yl)methyl)thio)ethylamine dihydrochloride. R-SH is produced after the reaction instead of CH3SH with a foul odor. R-SH is a high-boiling-point liquid, is not easily volatile, and has no odor of methyl mercaptan. Therefore, the preparation process of the invention does not have methyl mercaptan odor overflow, the reaction system does not require negative pressure, and the amount of alkali used in post-treatment is reduced, thereby reducing the generation of wastewater. The preparation method of the invention reduces energy consumption and pollution, reduces production costs, and is suitable for large-scale industrial production.

The application relates to the field of corrosion prevention technology, and particularly relates to a preparation process of heavy-duty anticorrosive paint for building bridges, which introduces a self-repairing prepolymer into water-based epoxy resin as a base material to improve the durability, uses composite basalt flakes as fillers, introduces diluents and penetrants as assistants under the action of a water-based amine curing agent, grows nanometer silicon dioxide on the surface of the basalt flakes in situ to obtain pretreated basalt flakes, and then grafts 2-urea-based-4[1H] pyrimidone; the self-repairing prepolymer is a silicone-modified prepolymer grafted with composite phenylboronic acid ester; the composite phenylboronic acid ester is obtained by a thiol-ene click reaction of eugenol and 3-mercapto-1,2-propanediol to obtain double-hydroxyl eugenol, and then grafted with 2-urea-based-4[1H] pyrimidone under the action of boron-nitrogen coordination between 2-dimethylaminoethylamine and 3-aminophenylboronic acid to form phenylboronic acid ester with pH response by dehydration.

The application discloses a method for preparing trifluoroethylamine by continuous aminolysis using a micro-channel method, which comprises the following steps: (1) mixing trifluoro-chloroethane with organic solvent I to obtain an A-phase solution; mixing ammonia, a surfactant and organic solvent II to obtain a B-phase solution; (2) feeding the A-phase solution and the B-phase solution into a micro-channel reactor at a certain flow rate at the same time, and heating to 50-110 DEG C to perform aminolysis reaction to obtain trifluoroethylamine. The preparation method disclosed by the application can ensure high conversion rate of a substrate, high selectivity and high yield of a target product, and the preparation process condition is simple, time consumption is short, and TFEA fine products are prepared, so that industrial production is more convenient to realize.

The invention discloses a synthesis method of 2-thiopheneethylamine, which comprises the following steps: Friedel-Crafts alkylation reaction: reacting thiophene with 1-bromo-2-chloroethane in a first organic solvent under the catalysis of Lewis acid to obtain 2-(2-bromoethyl) thiophene; and ammonolysis reaction: reacting the 2-(2-bromoethyl) thiophene with an ammonolysis reagent to obtain the 2-thiopheneethylamine. The 2-thiopheneethylamine is obtained through Friedel-Crafts alkylation reaction and ammoniation reaction in a non-aqueous medium by taking thiophene as an initial raw material, and in the whole synthesis process, the atom economy is high, an expensive catalyst is not needed, the reaction condition is mild, the yield is high, aftertreatment is simple, used chemicals can be recycled and reused, pollution is small, and the method is suitable for industrial production; meanwhile, the method avoids using a large amount of strong acid and strong alkali, is less in wastewater discharge and environment-friendly, and obviously reduces the production cost.