84 results about "N-Butylamine" patented technology

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention discloses weather-resistant unsaturated polyester resin as well as a preparation method and photovoltaic application thereof, and relates to the technical field of high polymer materials. When the weather-resistant unsaturated polyester resin is prepared, 1, 6-hexanediol, itaconic acid and an ultraviolet absorption monomer are subjected to esterification and polycondensation to prepare unsaturated polyester; the preparation method comprises the following steps: carrying out reaction on naringenin and 4-isocyanate-tetramethylpiperidine oxide to prepare a functional cross-linking agent; the preparation method comprises the following steps: reacting 3-(4-chlorphenyl) phosphine, 2, 2 '-thiobis (4-chlorophenol) and 2-butene-1, 4-diamine, and polymerizing and coating silicon dioxide to prepare pre-modified silicon dioxide; reacting the pre-modified silicon dioxide, n-butylamine and nickel acetate to obtain modified silicon dioxide; uniformly mixing unsaturated polyester, a functional cross-linking agent and modified silicon dioxide, and performing injection molding to obtain the weather-resistant unsaturated polyester resin. The weather-resistant unsaturated polyester resin prepared by the invention has excellent anti-aging, flame-retardant, self-repairing and mechanical properties.

The invention belongs to the technical field of fine chemical engineering, and particularly discloses a method for preparing a broad-spectrum bactericide 2-n-butylbenzo [d] isothiazole-3 (2H)-ketone by a molecular editing method. The preparation method comprises the following specific steps: taking 3H-1, 2-benzodisulfophenol-3-ketone and n-butylamine as raw materials, taking Selectfluor as an additive, adding the raw materials and the additive into a mixed solvent, and carrying out heating and stirring reaction, so as to obtain the target product 2-n-butylbenzo [d] isothiazole-3 (2H)-ketone (BBIT). The method is simple and convenient to operate, the raw materials are easy to obtain, the yield is high, thiophenol raw materials or excessive alkali are prevented from being used, and potential application value is achieved.

This invention belongs to the field of polymer materials technology and relates to a method for preparing a rigid hydrogel based on multi-branched epoxy oligomer crosslinked polyurethane. The method includes: weighing a polyurethane prepolymer, stirring and heating to 60-90°C, slowly adding a multi-branched epoxy oligomer dispersion, and reacting for 1-5 hours; determining the theoretical content of isocyanate groups using the di-n-butylamine method, and adjusting the system temperature to 35-55°C after reaching the theoretical value, and slowly adding a salting agent; cooling to room temperature, and removing the solvent by vacuum distillation using residual heat during the cooling stage; adding deionized water, and stirring until a white emulsion is obtained. This invention also applies the prepared rigid hydrogel to moisture-locking and fragrance-preserving packaging materials. The rigid hydrogel prepared by this invention exhibits stronger rigidity due to the introduction of a branched framework in its structure. When combined with aluminized paper, it forms a composite paper with moisturizing properties and excellent water absorption, making it widely applicable in the field of moisture-locking and fragrance preservation technology.

The invention relates to an intermediate of a chemical synthetic drug and a preparation method of the intermediate, in particular to an intermediate compound for preparing dronedarone and a preparation method of the intermediate compound. The intermediate is a new compound 2-n-valeryl-5-methanesulfonamide benzofuranone, and the compound can be applied to synthesis of a dronedarone drug through butt joint with 1-phenoxy-3-di-n-butylamine propane. The new intermediate is used for synthesizing dronedarone, raw materials and auxiliary materials are rich in source, low in price and easy to obtain, the process steps are short, the cost is low, the reaction conditions are mild and environmentally friendly, the target product preparation efficiency is high, no reaction device with special requirements exists, and the industrial production requirement can be met.

The invention relates to the technical field of lithium ion battery material recovery, in particular to a green stripping recovery method of a waste lithium iron phosphate battery positive electrode material. The method comprises the following steps: discharging and disassembling the waste lithium iron phosphate battery to obtain a positive pole piece; a hydrogen bond acceptor, a hydrogen bond donor and water are mixed, heated and stirred, the eutectic solvent is obtained, the hydrogen bond acceptor is inorganic salt capable of generating sulfate radical, nitrate radical, phosphate radical, carbonate radical or ammonium radical, and the hydrogen bond donor is one or more of urea, thiourea, tetraethylenepentamine, n-butylamine, N-ethylethylenediamine, 1-propanethiol and diallyl sulfide; and soaking and stripping the positive pole piece in the eutectic solvent to obtain the stripped and recycled positive pole material. According to the method, stripping and recycling of the positive electrode material are achieved, and the stripped and recycled positive electrode material is complete in structure, high in purity and good in electrochemical performance.

The invention relates to a recyclable water treatment agent based on polyaluminum chloride and a preparation method thereof, and belongs to the technical field of sewage treatment. According to the recyclable water treatment agent, hollow porous magnetic ferroferric oxide serves as a carrier, di-n-butylamine and 3-chloropropyltrimethoxysilane are used for substitution to prepare a surface treatment agent, the surface treatment agent is loaded to the surface of the carrier through the coupling effect, a tertiary amine structure in molecules of the surface treatment agent is coordinated with aluminum chloride, and the recyclable water treatment agent is prepared under the alkaline hot reflux condition. Polyaluminum chloride is formed on the surface in situ, a quaternary ammonium structure is formed by bromoethanol and tertiary amine in the polymerization process, the hollow porous carrier has good suspension dispersion capacity in sewage, and the surface quaternary ammonium structure and polyaluminum chloride form a charge neutralization-flocculation dual mechanism, so that efficient and deep purification is realized; meanwhile, quick separation and recovery can be achieved through an external magnetic field, and efficient recovery of polyaluminum chloride is achieved.

The present invention relates to a method for preparing an oil-soluble ionic liquid-carbon point eutectic, comprising the following steps: (1) preparing an ionic liquid: first adding n-butylamine to an excess of anhydrous ethanol and then dropping diisooctyl phosphate, or first adding n-octylamine and then dropping palmitic acid; then rapidly stirring the resulting solution at room temperature for 12 hours, rotary evaporation, vacuum drying, to obtain an ionic liquid diisooctyl phosphate n-butylammonium or palmitic acid n-octyl ammonium in a solid state at room temperature; (2) preparing carbon points: dodecylamine, anhydrous AlCl3 and o-dichlorobenzene oil bath pyrolysis to obtain carbon points; (3) preparing an ionic liquid-carbon point eutectic: adding 3 wt.%~10 wt.% of carbon points to the ionic liquid, then adding an excess of anhydrous ethanol, ultrasonically dissolving, vacuum drying, to obtain the corresponding ionic liquid-carbon point eutectic. At the same time, the present invention also discloses the application of the ionic liquid-carbon point eutectic. The preparation method of the present invention is simple, and has good oil solubility and room temperature fluidity as a lubricating oil additive.

The invention belongs to the field of cultural relic protection, and relates to a cultural relic surface accessible acidity determination method, which comprises: 1) placing a cultural relic sample using palm leaves as a carrier in a chemical adsorption device, and pre-treating in an inert gas atmosphere; (2) after pretreatment is completed, mixed gas formed by n-butylamine and inert gas is introduced into a chemical adsorption device, and specific chemical adsorption is carried out through the n-butylamine and accessible acid sites on the surface of the cultural relic sample; (3) after adsorption is completed, heating the inner cavity of the chemical adsorption device at a constant rate, desorbing n-butylamine, and recording a desorption signal at the same time; and 4) calculating the acid site concentration according to the desorption signal peak area obtained in the step 3), and determining the acid intensity according to the peak position distribution.The invention provides the cultural relic surface accessible acidity determination method with good specificity and high sensitivity.

The invention discloses an Ag-Bi2WO6 heterojunction photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: adding Na2WO4. 2H2O, Bi (NO3) 3.5 H2O and CTAB (Cetyltrimethyl Ammonium Bromide) into deionized water, violently stirring, uniformly dispersing, putting into a high-pressure kettle, and carrying out hydrothermal reaction to obtain Bi2WO6; the preparation method comprises the following steps: slowly pouring an ethanol solution of AgNO3 into an ethanol solution of Bi2WO6, heating and stirring, slowly dropwise adding n-butylamine, continuously heating and stirring, cooling, washing, and carrying out vacuum drying to obtain Ag-Bi2WO6. Compared with an existing photocatalyst, the Ag-Bi2WO6 heterojunction has good stability and responsivity to CO2, a strong built-in electric field at the heterojunction interface can accelerate separation and transfer of carriers and enhance adsorption and activation of CO2, and therefore the activity of photocatalytic reduction of CO2 is improved.

The invention relates to the technical field of mildewproof agents, and discloses a mildewproof agent, a preparation method and application thereof.The mildewproof agent is prepared from propyne n-butylamine formate with iodine being 0.1-2%, 2-bromo-2-nitro-1, 3-propylene glycol, 1-15% of an emulsifier and the balance solvent, and the mildewproof agent is a broad-spectrum bacteriostatic agent, can kill various fungi and bacteria, and has the advantages that the mildewproof agent is safe and environmentally friendly; when in use, the mildew inhibitor can be directly sprayed on the surface of a protected material to achieve a long-acting mildew-proof effect, the stabilizer is added into the mildew inhibitor, the stabilizer can inhibit the debromination, decomposition and yellowing effects of 2-bromo-2-nitro-1, 3-propylene glycol in the mildew inhibitor in a high-temperature and sunshine environment, the stability of the mildew inhibitor in the high-temperature and sunshine environment is improved, and the mildew-proof effect is good. The action time of the mildew preventive is prolonged, and the maintenance cost of mildew-proof treatment is reduced.

The application is a kind of continuous preparation method and application of core-shell type reduced Cu-based catalyst. The method uses membrane dispersion micro-reactor technology, adopts liquid phase chemical reduction method with potassium borohydride-hydrazine hydrate as double reducing agent, continuously prepares reduced Cu-based nanoscale catalyst, does not need high temperature calcination and hydrogen reduction, can be directly used as active catalyst for catalytic reaction, and realizes green and efficient preparation. The catalyst prepared by the application is used in the reaction of preparing N-butyl-2,2,6,6-tetramethyl-4-piperidinamine from 2,2,6,6-tetramethyl-4-piperidinone and n-butylamine through reductive amination, and excellent catalytic activity and stability are shown.

The invention relates to a preparation method of cuprous oxide polycrystalline particles with a micro-nano structure, and belongs to the technical field of cuprous oxide polycrystal preparation, the preparation method comprises the following steps: firstly, dropwise adding an organic amine aqueous solution into a bivalent copper salt aqueous solution, stirring for reaction, then dropwise adding a reducing agent solution into a reaction solution, continuously stirring for reaction, and centrifuging and drying the reaction solution to obtain a product; the average particle size of the micro-nano structure cuprous oxide polycrystalline particles is 1-2.3 [mu] m, and the micro-nano structure cuprous oxide polycrystalline particles are formed by co-growth of small-size cuprous oxide crystals; the grain size of the small-size cuprous oxide crystal forming the cuprous oxide polycrystalline particle with the micro-nano structure is determined by the type of the organic amine, the organic amine is one or more of aniline, furfuryl amine, benzylamine, phenylethylamine and n-butylamine, and the grain size of the small-size cuprous oxide crystal is 40-600 nm. The crystal particle size of the polycrystalline particles formed by the method disclosed by the invention can be controllably adjusted in a range of 40-600nm by selecting different organic amines.

The invention discloses a high-salinity organic wastewater biological treatment method which is characterized by comprising the following steps: step 1, screening halophilic bacteria: directly screening the required halophilic bacteria through soil of saline-alkali soil, and then carrying out secondary screening on flora mixed culture obtained by primary screening; the method has the beneficial effects that halophilic bacteria ZC2403-SYL, ZC2404-SYT and halotolerant bacteria ZC2402-MT which can still degrade pollutants are screened out in a high-salt environment by utilizing a microbial method, organic matters including triethylamine, n-butylamine and formamide can be degraded in the high-salt environment, the degradation rate can reach 90% or above within 72 hours, and the method is simple and convenient to operate and has a wide application prospect. A high-efficiency salt-tolerant biological treatment system and a high-efficiency bacterium, namely a halophilic bacterium system, are constructed aiming at high-salt and refractory organic pollutants, the three strains obtained by screening are mixed and cultured to quickly form a high-salt organic wastewater high-efficiency degradation bacterium agent ZC-SY, and the high-salt organic wastewater high-efficiency degradation bacterium agent ZC-SY is put into actual high-salt organic wastewater to be used, so that stable operation can be achieved. The problem of treating the organic high-salinity wastewater in practice can be effectively solved, and the water treatment cost is reduced.

The invention discloses composite powder and a preparation method thereof, and belongs to the field of preparation of powder for laser cladding, and the preparation method comprises the following steps: dissolving citric acid and polyvinylpyrrolidone in an ethylene glycol solution, then sequentially adding zirconium nitrate and WC particles, and fully stirring; transferring the mixed solution to a three-neck flask, setting the stirring speed and the heating rate of a heating magnetic stirrer, adding n-butylamine after the reaction temperature is reached, and carrying out constant-temperature reaction for a certain time to obtain a reactant; moving the reactant out of the heating device for cooling, and centrifugally washing and drying the cooled reactant to obtain a precursor product; and carrying out radio frequency plasma spheroidization on the precursor product to obtain the ZrO2-WC composite powder. The preparation method of the composite powder is simple and high in synthesis speed; zrO2-WC composite powder with different densities can be obtained by adjusting process parameters, and the requirements of different parent phase coating reinforced phases are met; according to the method, the problems of decarburization, burning loss and sinking segregation of WC in the laser cladding process are effectively avoided.

A zeolite having a ferrierite framework structure produced using one or more of n-propylamine, n-butylamine, isobutylamine, and n-pentylamine as a structure directing agent.

The utility model provides a production device for synthesizing TBTD in one step, which comprises a reaction kettle, a di-n-butylamine adding pipeline, a hydrogen peroxide adding pipeline, a carbon disulfide adding pipeline, a soft water adding pipeline, a carbon disulfide gas discharging pipeline and a nitrogen pipeline are arranged at the top end of the reaction kettle, and the carbon disulfide gas discharging pipeline is connected with a gas inlet of a condenser. A condensate outlet pipeline of the condenser is connected with a carbon disulfide receiving tank, a bottom outlet pipeline of the carbon disulfide receiving tank is connected with a carbon disulfide adding pipeline, and the carbon disulfide adding pipeline is further connected with a carbon disulfide transfer pump; hydrogen peroxide is adopted as an oxidizing agent, so that high-salinity wastewater discharge is reduced; the reaction liquid is washed with water for many times to remove residual alkali liquor and byproducts, water is used as a solvent to replace a traditional methanol / ethanol system, and emission of VOCs is reduced; the metering pump is used for dropwise adding materials, so that automatic sealing feeding is realized, and harm to bodies of workers is reduced; carbon disulfide is recycled for next reaction, so that the material loss is reduced, and the pollution problem in the subsequent treatment process is reduced.

The present invention relates to the technical field of biodegradable materials, and specifically discloses a biodegradable material for adding BBM bamboo powder and its application in beer bottles. The raw materials of the above-mentioned biodegradable material for adding BBM bamboo powder include by mass: 10-20 parts of polybutylene succinate, 10-30 parts of polybutylene adipate terephthalate, 10-20 parts of bamboo powder, 1-3 parts of dopamine hydrochloride, 0.1-0.5 parts of n-butylamine, 1-2 parts of hexadecyltrimethylammonium bromide, 1-5 parts of tetraethyl orthosilicate, 1-2 parts of tetrabutyl titanate, 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of antioxidant, and 1-2 parts of plasticizer. The BBM obtained by the present invention has excellent mechanical properties, while improving the anti-ultraviolet strength of degradable materials to a certain extent, and has good biodegradability.

The invention relates to a steel ball valve which comprises a ball valve main body, and the surface of the ball valve main body is treated by an antirust agent comprising the following components: pyridine-3-carboxylic acid acyl chloride, n-butylamine thiocyanate, p-formylbenzoic acid, 4-hexylbenzaldehyde, pyrrole, p-toluene sulfonic acid, propionic acid, absolute ethyl alcohol, polyethylene glycol and dichloromethane. The application has the following advantages and effects: an acyl chloride group in pyridine-3-carboxylic acid acyl chloride reacts with n-butylamine thiocyanate, and a-N = C = S group is introduced to improve the corrosion inhibition performance; p-methylbenzenesulfonic acid catalyzes p-formylbenzoic acid, 4-hexylbenzaldehyde and pyrrole to react to obtain a porphyrin compound, the porphyrin compound has hydrophilic carboxyl and a hydrophobic long carbon chain, and the overall amphoteric balance of the antirust agent is improved; the acyl isothiocyanate compound and the porphyrin compound have a synergistic effect to enhance the rust prevention and corrosion inhibition performance of the ball valve main body, so that the corrosion generated when the steel ball valve is exposed in a humid environment for a long time is reduced, and the service life is prolonged.

The present application relates to the technical field of molecular sieve preparation, and provides a surface silicon-rich binderless ZSM-5 molecular sieve catalyst and a preparation method and application thereof.The overall SiO2 / Al2O3 of the ZSM-5 molecular sieve catalyst is 86-203, the SiO2 / Al2O3 of a surface layer with a depth of 2-10 nm is 8-33% higher than the overall SiO2 / Al2O3; the acid strength measured by using Hammett indicator n-butylamine titration method is H0≤+2.27, and the content of surface acid sites is ≤0.02 mmol / g; and the ZSM-5 molecular sieve catalyst is a shaped body without amorphous phase.The surface silicon-rich binderless ZSM-5 molecular sieve catalyst provided by the present application does not contain inert adhesive, has extremely weak surface acidity, can improve the catalytic effect, and reduces the generation of by-products.In addition, the preparation method provided by the present application is simple in process and suitable for industrial production.

The invention discloses a solid defoamer suitable for ceramic glazing and a preparation method thereof. The solid defoamer comprises the following formula: 10-30 parts of rhamnose, 0.0001-0.05 parts of a DMC bimetallic catalyst, 5-20 parts of polyoxyethylene, 5-40 parts of polyoxypropylene, 0.1-2.5 parts of a hydrogen capping agent, 5-20 parts of polydimethylsiloxane, 5-20 parts of carborane, 1-5 parts of n-butyllithium, 0.0001-0.009 parts of cis-dichlorodiammineplatinum, 3-8 parts of methyldichlorosilane, 0.0001-0.01 parts of ferric chloride, 0.8-4 parts of ammonium chloride, 10-30 parts of bovine bone ash, 6-20 parts of fumed silica, 0.001-3.5 parts of light calcium carbonate, 0.8-3.0 parts of phenoxyethanol, 0.001-0.2 parts of iodopropynyl n-butylcarbamate, and 20-40 parts of water. The present invention utilizes carborane to enhance ceramic properties while avoiding the problem of residue disposal. The dispersion of silicon dioxide and light calcium carbonate ensures uniform dispersion and stable ceramic components. The use of cattle bone ash as a dispersant ensures uniform dispersion and a moist ceramic surface.

The invention relates to continuous reaction equipment of N-n-butyl thiophosphoric triamide and a preparation method of the N-n-butyl thiophosphoric triamide. The invention discloses a continuous preparation method of N-n-butyl thiophosphoric triamide and reaction equipment, and belongs to the technical field of fine chemical engineering. The method comprises the following steps: uniformly mixing thiophosphoryl chloride serving as an initial raw material with a solvent in a batching kettle to prepare a thiophosphoryl chloride solution; the method comprises the following steps: respectively adding a thiophosphoryl chloride solution, n-butylamine and inert gas into a micro-channel reactor through a flow pump to carry out substitution reaction, and separating hydrogen chloride gas and an N-n-butyl dichlorothiophosphoramide solution through a gas-liquid separator; then adding the N-n-butyl dichlorophosphoramide thiophosphate solution and liquid ammonia into a tubular reactor through a flow pump to obtain an N-n-butyl thiophosphoric triamide solution; and finally, extracting, washing, concentrating an organic phase, crystallizing, separating and drying to obtain the high-purity N-n-butyl thiophosphoric triamide. The method is safe, efficient, simple and convenient to operate, good in reaction selectivity, high in yield, low in pollutant emission, low in production cost and suitable for industrial production.

The invention provides a preparation method of an N-alkoxy hindered amine light stabilizer Tinuvin 152, which comprises the following steps of: performing one-step oxidation process on 2, 2, 6, 6-tetramethyl-4-piperidone serving as a raw material and hydrogen peroxide to obtain a free radical intermediate II, performing alkylation reaction on the free radical intermediate II and cyclohexene to obtain an N-alkoxy piperidone intermediate as shown in a formula III, and preparing the N-alkoxy hindered amine light stabilizer Tinuvin 152 by using the N-alkoxy hindered amine light stabilizer Tinuvin 152. The intermediate and n-butylamine are subjected to hydrogenation reduction under the catalysis of 10% palladium on carbon, and 1-cyclohexyloxy-4-(n-butylamino)-2, 2, 6, 6-tetramethylpiperidine shown in the formula IV is prepared. Then carrying out substitution reaction on the formula IV and cyanuric chloride to obtain a disubstituted intermediate V with high selectivity; reacting the intermediate V with ethanolamine at a high temperature to prepare an N-alkoxy hindered amine light stabilizer Tinuvin 152; the intermediate product obtained by the process is high in yield, good in purity, short in reaction time, simple in post-treatment and convenient to operate; the product can effectively absorb ultraviolet rays, material aging and discoloration are prevented, and the service life of the product is prolonged.

The invention discloses a method for measuring the content of isocyanate groups in a polyurethane prepolymer. The method comprises the following steps: measuring dry xylene for later use; weighing a proper amount of polyurethane prepolymer, dissolving the polyurethane prepolymer in xylene, adding a di-n-butylamine-xylene solution, uniformly mixing, and standing; adding isopropanol and standard hydrochloric acid into the mixed solution for mutual dissolution; adding a bromocresol blue indicator and fully oscillating; titrating with a hydrochloric acid standard solution until the terminal color turns yellow from blue, and meanwhile, carrying out a blank experiment; finally, the content of isocyanate groups in the polyurethane prepolymer is obtained through a calculation formula. The mass ratio of the polyurethane prepolymer to the xylene is (0.1-1): (8-12), the mass ratio of the polyurethane prepolymer to the di-n-butylamine-xylene solution is (0.1-1): (9-12), and the mass ratio of the polyurethane prepolymer to the isopropanol is (0.1-1): (18-22). The method is easy and convenient to operate, accurate in measurement, high in reliability and suitable for quality control in the production and application process of the polyurethane prepolymer.

The invention discloses a method for improving the performance of a solar cell by optimizing a wide-band-gap perovskite buried interface by using n-butylamine methyl sulfonate, and the cell is a formamidine-cesium-based mixed halogen perovskite solar cell. The perovskite solar cell sequentially comprises a conductive substrate, a hole transport layer, a self-assembly monomolecular layer, a passivation layer, a broadband gap perovskite light absorption layer, an electron transport layer, a buffer layer and a metal electrode from bottom to top, and the passivation layer is prepared by spin-coating an isopropanol solution containing n-butylamine methyl sulfonate and Al2O3 or SiO2, and heating and annealing at 100 DEG C. The problems that in the prior art, Al2O3 isopropanol dispersion liquid is prone to agglomeration, and a formed passivation layer is poor in uniformity are solved, the n-butylamine methyl sulfonate is doped into Al2O3 or SiO2 nanoparticles, the prepared passivation layer is more uniform, a wide-band-gap perovskite buried interface is optimized, uniform deposition and crystallization of a perovskite film are promoted, and the performance of a solar cell is improved.

The invention relates to a production method for improving photo-thermal stability of a chloromethyl ethyl ether industrial product, and belongs to the technical field of chloromethyl ethyl ether processing.The preparation of an intermediate 1 comprises the steps that 80-120 mL of ethyl alcohol, 20-25 g of 3, 5-di-tert-butyl-4-hydroxybenzaldehyde and 6-10 g of n-butylamine are added into a 250 mL four-opening bottle provided with a backflow water diversion device, the temperature is increased to 60 DEG C, a reaction is carried out for 1 h, and an intermediate 2 is obtained; cooling to 0 DEG C by adopting an ice salt bath, adding 1-3g of potassium borohydride in batches, keeping the temperature at 0 DEG C, continuing to react for 0.5 hour, and adding a 5% citric acid aqueous solution to adjust the pH value to 2.0-3.0; the special photo-thermal stabilizer is synthesized and compounded with the epoxidized soybean oil, a single stabilizer and a special formula free of chloromethyl ether are generally adopted in the traditional method, the photo-thermal stabilizer containing the hindered phenol and piperazine structure is synthesized by the method, synergistic protection of light shielding, thermal stability and acid capture is achieved after compounding, and the product performance is remarkably improved; and the purity retention rate is 95-97% after 168h of ultraviolet aging.

The invention provides a synthesis method of n-butyl isocyanate. The synthesis method comprises the following steps: S1, introducing raw materials including an n-butylamine solution and phosgene into a tubular reactor for substitution reaction to obtain a reaction solution; s2, raw materials including the reaction liquid and protective gas are introduced into the reaction kettle for a cracking reaction, and the n-butyl isocyanate is obtained. Reaction liquid and protective gas in the step S2 enter a high-pressure reaction kettle to be subjected to cracking reaction, and hydrogen chloride can be discharged in time by introducing the protective gas, so that the content of by-products of n-chlorobutane and 1, 3-dibutyl urea can be reduced, and the purity can be improved. Meanwhile, phosgene is in a liquid state under high pressure and can continuously react with n-butylamine which does not participate in the reaction, so that the phosgene does not need to be additionally introduced, and the synthesis cost of the n-butyl isocyanate is reduced.

The invention belongs to the technical field of antibiosis and mildew prevention, and particularly relates to an antibiosis and mildew prevention material and a preparation method and application thereof. The antibacterial and mildew-proof material comprises the following components in percentage by mass: 0.01%-1% of a mildew-proof agent, 0.1%-5% of sustained-release micelles, 0.03%-1.5% of a cross-linking agent, 10%-20% of acrylic acid slurry and 75%-85% of water, wherein the mildewproof agent is iodopropynyl n-butylamine formic ester; the mixed monomer of the sustained-release micelle is an acrylate compound and quaternary ammonium salt; and the cross-linking agent is polyhydroxy melamine. According to the antibacterial and mildew-proof material and the preparation method thereof, the problem that the antibacterial and mildew-proof performance of a filter element fabric is obviously reduced in the using process is solved, and the filter element fabric has lasting and efficient antibacterial and mildew-proof performance.

The invention discloses a method for deeply converting CO2 into acetaldehyde and crotonaldehyde, and belongs to the technical field of conversion of acetaldehyde and crotonaldehyde, and the method comprises the following steps: S1, taking one or a mixture of more of melamine, urea and dicyandiamide as a precursor, dissolving the precursor in an aqueous solution under a heating condition, and uniformly stirring until the precursor is completely dissolved; s2, adding one or more of deprotonation agents including triethylamine, isopropanolamine, 1-methylimidazole, n-butylamine, pyridine and tetramethylammonium hydroxide, mixing, and uniformly stirring; s3, placing in a hydrothermal reaction kettle, reacting under given temperature and time conditions, and cooling to room temperature; s4, carrying out centrifugal washing, drying and calcining to obtain polymeric carbon nitride with a crystal / amorphous interlaced interface; according to the method, other hydrogenation steps of the intermediate in the CO2 conversion process are inhibited, and on the basis of high yield and selectivity of acetaldehyde, C-C chain growth is further carried out to generate crotonaldehyde.

The application discloses a kind of lead sulfide quantum dots with adjustable light absorption range, preparation method and application thereof.Sulfur source is dissolved in short-chain amine solvent, lead source and organic small molecule ligand solution dissolved in organic polar solvent are added, and then sulfur source solution is added, and the reaction is stirred at a temperature of 0-100 DEG C to obtain a reaction product;anti-solvent is added, and the product is washed and dried to obtain lead sulfide quantum dots with uniform particle size and adjustable light absorption range.By adjusting the content of precursor, reaction solvent and temperature, and under the action of n-butylamine, PbS quantum dots with adjustable light absorption range are directly synthesized in one step, which solves the limitations of small light absorption range and low yield of quantum dot ink direct synthesis, and obtains quantum dots with a light absorption range of 1000nm-2000nm wavelength.The synthesized quantum dots have achieved preliminary application in photoelectric detector.