18 results about "N-Butylamine" patented technology

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 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 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 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 application provides a MWW structure molecular sieve and a preparation method and application thereof. The preparation method comprises the following steps: mixing an aluminum source, water, an alkali source, a first template agent, a second template agent, a silicon source and seeds to form a gel, and crystallizing the gel to obtain the MWW structure molecular sieve; wherein the first template agent comprises cyclohexylamine, and the second template agent comprises at least one of diisopropylamine, di-n-butylamine, diisobutylamine, 1,4-diazabicyclo[2.2.2]octane, 1,6-hexanediamine and N,N,N,N-tetramethyl-1,6-hexanediamine. The application further provides the MWW structure molecular sieve prepared by the above preparation method and the application of the MWW structure molecular sieve. According to the application, the MWW structure molecular sieve can be directly synthesized without using hexamethyleneimine, piperidine and homopiperazine by the method of seed and two template agents assisting crystallization.

The application discloses a method for synthesizing molecular sieve by using rice hull as a silicon source and a template, and comprises the following steps: (1) soaking rice hull powder in a hydrochloric acid solution, then heating the rice hull powder in an oil bath to remove impurities, then washing the obtained suspension with deionized water until neutral, and then drying the suspension in an oven; (2) grinding and mixing the material obtained in the step (1), a structure directing agent, NaAlO2 and NaOH uniformly, and then crystallizing, wherein the structure directing agent is tetrapropylammonium hydroxide and / or n-butylamine; (3) high-temperature calcining the material obtained in the step (2) to remove organic cellulose and template components, and thus the molecular sieve is obtained. The application effectively solves the problems of large wastewater discharge and high cost in the preparation process of traditional molecular sieve.

The application discloses a kind of molybdenum bis (dibutyl dithiocarbamate) oxide and preparation method thereof, comprising the following steps: molybdenum trioxide, phase transfer catalyst and water are uniformly mixed, are sent into first-stage mixing reactor, sodium hydrosulfide, sodium thiosulfate and water are uniformly mixed, also are sent into first-stage mixing reactor, and first reaction solution is obtained by reaction;Di-n-butylamine and water are uniformly mixed, are sent into second-stage mixing reactor, carbon disulfide is simultaneously sent, and second reaction solution is obtained by reaction;First reaction solution, second reaction solution are respectively sent into third-stage mixing reactor and are reacted, obtain molybdenum bis (dibutyl dithiocarbamate) oxide solution, solid-liquid separation, drying, obtained immediately.The yield of product obtained by the application is high, the purity is high, the quality is stable, the whole reaction process is continuously carried out in airtight container, there is no gas volatilization, which is conducive to environmental protection, reaction solvent is water, resource consumption is less, can be recycled, clean and environmentally friendly.

The invention provides a flame-retardant resin composition with remoldability and a preparation method thereof. The flame-retardant resin composition with remoldability comprises epoxy resin, a flame retardant, linear dicarboxylic acid and a catalyst. The epoxy resin comprises bisphenol A diglycidyl ether. The flame retardant comprises a dicarboxylic acid structure chain segment and a structure chain segment as shown in a formula (1). The linear dicarboxylic acid is represented by formula (2). The catalyst comprises di-n-butylamine. The ratio of the mole number of the epoxy resin to the total mole number of the flame retardant and the linear dicarboxylic acid is 1: 0.9-1: 1.1. Wherein n is an integer from 4 to 10. Based on high strength, flexibility, remoldability and flame retardance provided by the resin composition, the resin composition disclosed by the invention is suitable for being used as a functional reinforcing material of flexible materials such as fibers or cloth and the like, and is convenient to recycle and reuse so as to adapt to sustainable development of low-carbon, regenerative and cyclic environmental protection.

This invention discloses an N-butylbenzenesulfonamide, its preparation method, and its applications, relating to the field of organic chemical synthesis technology. The preparation method uses benzenesulfonyl chloride and n-butylamine as raw materials, an organic base as catalyst, and a solid alkaline substance as acid-binding agent, reacting in an organic solvent system to obtain N-butylbenzenesulfonamide. The preparation method has the following advantages: low catalyst dosage, significantly reducing costs; high raw material utilization and few side reactions; low acid-binding agent dosage, resulting in less waste salt and wastewater; the reaction is carried out under normal pressure, eliminating the need for high temperature and high pressure conditions; the acid-binding agent and catalyst are readily available chemical raw materials, resulting in low cost and strong feasibility for large-scale production. The obtained N-butylbenzenesulfonamide is widely used in plasticizers, adhesives, printing inks, and surface coatings, showing excellent market prospects.

This invention discloses a continuous preparation method and application of a core-shell Cu-based catalyst. The method utilizes membrane dispersion microreactor technology, precisely controlling the solution pH and total flow rate to uniformly coat the metal core with SiO2 at a moderate condensation rate, forming a core-shell structure with uniform particle size and regular morphology. This structure provides abundant active sites and enhances the catalyst's hydrogenation activity. Simultaneously, the mutual doping of Cu and Ni creates a synergistic effect; the introduction of Ni significantly improves the catalyst's ability to dissociate H2 to generate activated hydrogen, promoting the adsorption and activation hydrogenation of the imine intermediate. The catalyst prepared by this invention exhibits excellent catalytic activity and stability in the reductive amination of 2,2,6,6-tetramethyl-4-piperidinone and n-butylamine to N-butyl-2,2,6,6-tetramethyl-4-piperidinamine.

The embodiment of the application discloses a kind of low-temperature self-extraction regeneration functionalized ionic liquid CO2 absorbent and its application, and the absorbent includes as main absorbent functionalized ionic liquid into di-n-butylamine imidazole ([DBAH][Im]) and solvent.Due to main absorbent is functionalized ionic liquid, there is group interaction between absorbent anion and cation, so that the desorption free energy of absorption product is lower, and low-temperature regeneration is realized to reduce energy consumption.At the same time, the embodiment also has the "self-extraction" characteristic, that is, in the regeneration process, the desorbed ionic liquid is collected at the top of the solution to form an organic phase, which acts as a self-extraction agent to extract the ionic liquid regenerated subsequently in the aqueous phase.Due to the "self-extraction" effect of functionalized ionic liquid in the desorption process, the absorbent can be quickly separated from the product, thereby promoting the desorption process and improving the desorption rate.The embodiment has the advantages of functionalized ionic liquid and phase change absorbent, with the advantages of low cost, high regeneration efficiency and low regeneration energy consumption.

The invention discloses a preparation method of a flame retardant NOR116 intermediate, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: by taking 4-carbonyl-TEMPO as a raw material, carrying out photocatalytic reaction on the 4-carbonyl-TEMPO and cyclohexyl boride under the action of a catalyst, so as to prepare 1-cyclohexyl oxy-2, 2, 6, 6-tetramethylpiperidine-4-ketone; and then reacting with n-butylamine to generate the NOR116 intermediate. According to the method, all the raw materials can be conveniently purchased on the market, the imidization reaction and the photocatalytic reaction are performed, the yield is high, and the route operability is high.

The invention provides a light high-rigidity floor and a preparation method of the light high-rigidity floor. Comprising the following raw materials: 60 to 70 parts of PVC resin, 6 to 10 parts of phenolic resin particles, 10 to 12 parts of tetraethoxysilane, 2 to 5 parts of n-butylamine, 0.3 to 0.8 part of maleic anhydride, 6 to 8 parts of silane modified hollow glass beads, 0.1 to 0.5 part of a stabilizer, 1 to 3 parts of a lubricant, 0.5 to 1 part of dicyclopentadiene dicarboxylate and 0.3 to 0.8 part of a silane coupling agent. According to the invention, through triple design of a thermally reversible crosslinked PVC matrix, a porous SiOS network generated in situ by TEOS and a chemically bonded lightweight filler, the composite material is lighter and stronger.

The application discloses a method for preparing dibutyl lauroyl glutamine and application, wherein long-chain alkyl acyl glycine and acetic anhydride are added into a first reaction container containing cyclohexane, a long-chain alkyl cyclization product is prepared by warming and refluxing reaction; the prepared long-chain alkyl cyclization product is added into a second reaction container containing cyclohexane, an alkaline substance and N-butyl acrylamide are further added for reaction, the alkaline substance and solvent are removed after the reaction, and a long-chain alkyl butylamide propenyl oxazolone is prepared; the prepared long-chain alkyl butylamide propenyl oxazolone is put into a third reaction container containing cyclohexane, n-butylamine is further added into the third reaction container for refluxing reaction, and the solvent is evaporated to prepare long-chain alkyl glutamic acid dibutylamide. The application firstly performs ring-closing reaction, then performs Michael addition on a reserved site of the structure, and ingeniously performs chain extension reaction on the structure, and finally obtains a target compound.

This invention provides a method for synthesizing Silicalite-1 molecular sieves using n-butylamine as a template agent, relating to the field of molecular sieve technology. The invention involves mixing n-butylamine, water, a silicon source, Silicalite-1 molecular sieve seed crystals, and sodium hydroxide to obtain an initial gel mixture. The silicon source includes one or more of silica, silica sol, silica gel powder, and tetraethyl orthosilicate. The initial gel mixture is then subjected to hydrothermal crystallization to obtain Silicalite-1 molecular sieves. This invention uses n-butylamine as a template agent and employs a seed-assisted synthesis method for Silicalite-1 molecular sieves, which significantly reduces the amount of n-butylamine used and the synthesis time. Compared with existing technologies, the synthesis method provided by this invention features inexpensive raw materials, low organic template agent usage, high product crystallinity, short synthesis time, and high yield, overcoming the disadvantages of existing synthesis methods that require expensive and large amounts of template agents.

The invention provides a method for synthesizing an anti-malarial drug lumefantrine, and relates to the technical field of chemical engineering. The preparation method comprises the following steps: carrying out reduction reaction on 4-acetylchloro-2, 7-dichlorofluorene and a reducing agent in an organic solvent to obtain an intermediate product; in an organic solvent in the presence of alkali, cyclizing the intermediate product to obtain 2, 7-dichlorofluorene-4-ethylene oxide; the product is subjected to a reaction with di-n-butylamine, and Alpha-(di-n-butylamine methyl)-2, 7-dichlorofluorene-4-methanol is obtained; and carrying out condensation reaction on the product and p-chlorobenzaldehyde to obtain the lumefantrine. The preparation technology is improved, n-butyl alcohol is adopted as a solvent, an intermediate in each step in the whole preparation process is not taken out, one-pot preparation of the lumefantrine is achieved, many devices such as reaction kettles, centrifugal machines and drying ovens are omitted for industrial production, corresponding human input is reduced, the product cycle is shortened, and the production cost is reduced. Factory profit is achieved to the maximum extent, and social resources are saved.

The invention discloses a preparation method of m-dibutylaminophenol, and relates to the technical field of carbocyclic compound preparation, the m-dibutylaminophenol comprises the following raw materials: 2-chlorophenol, 2, 6-di-tert-butyl-4-methylphenol, zinc chloride, tetrabutylammonium bromide, sodium amide, potassium tert-butoxide, an activated 3A molecular sieve, di-n-butylamine and triethylamine; according to the invention, 2-chlorophenol is used as a core reaction substrate, the structure arrangement of ortho-position chlorine atoms and hydroxyl is highly adaptive, hydrogen chloride can be accurately removed under the action of strong alkali to generate a benzyne intermediate, and a stable benzene ring skeleton is provided for a target product; through the synergistic effect of the activated 3A molecular sieve, the 2, 6-di-tert-butyl-4-methylphenol and the potassium tert-butoxide, the total impurity content is greatly reduced, the product purity and color are remarkably optimized, and the synchronous improvement of the reaction efficiency and the product quality is realized.