912results about "Amino compound purification/separation" patented technology

The invention discloses a green preparation process of a microwave-assisted synthesized perovskite semiconductor material, which aims at solving the problems of long reaction period, large reagent dosage, heavy pollution and the like of the traditional perovskite preparation process, adopts a novel organic-inorganic hybrid precursor and green solvent system, and accelerates the reaction by microwave radiation. The rapid and environment-friendly synthesis of the material is realized by accurately regulating and controlling microwave parameters and combining multiple processes such as intermittent and collaborative ultrasonic processes. Novel compounds such as nitrogen-containing heterocyclic borate and organic phosphonate are introduced to optimize the performance of the material. The process significantly shortens the preparation period, reduces reagent consumption, improves photoelectric properties, and enhances material stability.

The invention discloses a chiral amino acid resolving agent for preparing trans chiral indene amine, and particularly provides a chiral amino acid derivative which is used as a resolving agent for resolving trans-2, 6-dimethyl-1-indene amine and preparing (1R, 2S)-2, 6-dimethyl-1-indene amine. According to the method, the conditions of the resolution process are mild, the used solvent is a general solvent which is widely applied in the market, low in price and easy to obtain, and the (1R, 2S)-2, 6-dimethyl-1-indene amine is obtained with high yield and high optical purity. The method has the beneficial effects that (1R, 2S)-2, 6-dimethyl-1-indene amine is obtained, the ee value of the (1R, 2S)-2, 6-dimethyl-1-indene amine is greater than 97%, and the resolution yield is greater than 95%. As the resolving agent is poor in hydrophilicity, the resolving agent can be recycled at a high recovery rate, the process repeatability is high, and industrial production is easy to realize.

The invention relates to a degradable epoxy resin composite material with an adjustable curing speed, and a preparation method and a mild total recycling method thereof. Existing degradable epoxy resin has the problems of high cost, harsh degradation conditions and the like, and is difficult to meet the requirements of different application scenes on curing speed and temperature at the same time. The invention provides an epoxy resin composite material which comprises curing agent components (an epoxy resin amine curing agent and an ester-containing polythiol curing agent) and epoxy resin components (glycidyl ether epoxy resin, glycidyl amine epoxy resin and glycidyl ester epoxy resin). The cured composite material can be fully recycled through catalytic degradation under mild conditions by using a lewis acid and an amino group breaking ester bond mechanism, and the degradation product can be directly used as a curing agent, a toughening agent and a chain extender. The epoxy resin composite material disclosed by the invention not only has adjustable curing speed and high use performance, but also realizes environmental friendliness and resource recycling, and provides a new solution for sustainable development of epoxy resin.

The invention discloses a method for joint production of cyclohexylamine and dicyclohexylamine, which comprises the following steps: 1) feeding aniline tail gas of a nitrobenzene catalytic hydrogenation production device into a gas-liquid separator for gas-liquid separation to obtain aniline tail hydrogen and aniline condensate; 2) mixing aniline tail hydrogen and new hydrogen as a raw material A, and mixing defective aniline and fresh aniline in proportion as a raw material B; (3) feeding the vaporized raw material B and the vaporized raw material A into a fixed bed reactor according to a certain hydrogen-oil ratio, and carrying out hydrogenation reaction; a hydrogenation reaction product is subjected to heat exchange condensation and then enters a gas-liquid separator for gas-liquid separation, a gas phase serves as recycle hydrogen to be mixed with the raw material A, and a liquid phase is fed into a distillation device; and 4) carrying out primary distillation and rectification purification in sequence to obtain cyclohexylamine and dicyclohexylamine. According to the method, aniline tail gas resources and defective aniline are fully utilized, the three-waste treatment cost is reduced, product benefits can be improved, pollution to the environment can be reduced, and economic benefits and social benefits are remarkable.

The invention relates to a method and a system for synthesizing N-methylaniline and co-producing N, N-dimethylaniline by a gas phase method, and belongs to the technical field of chemical engineering. The system comprises a raw material gasification unit, a reaction unit, a separation and rectification unit and a hydrogen recovery unit which are connected through pipelines. The method comprises the following steps of: firstly, mainly synthesizing N-methylaniline from raw materials aniline and part of methanol in a first-methylaniline reactor, then partially or completely feeding first-methylaniline reaction gas into a second-methylaniline reactor, adding methanol steam, and further reacting to generate N, N-dimethylaniline. And after the product gas is subjected to heat exchange energy recovery, a liquid phase and a gas phase respectively enter the separation and rectification unit and the hydrogen recovery unit. The purification of N-methylaniline and N, N-dimethylaniline and the recovery of byproduct hydrogen are realized. The yield of N, N-dimethylaniline (in terms of aniline) can be adjusted in a range of 5-30% by adjusting reaction conditions and a feeding ratio.

A method for continuously producing m-xylylenediamine belongs to the technical field of organic synthesis and comprises the following steps: (1) mixing isophthalonitrile, toluene and liquid ammonia according to a mass ratio of 1: (3-5): (13-17) in a nitrogen atmosphere to form a reaction mixture; (2) heating the interior of a reaction bed containing a catalyst to 90-95 DEG C, continuously introducing hydrogen into the reaction bed, introducing the reaction mixture after the pressure intensity of the reaction bed is stable, and carrying out a catalytic hydrogenation reaction to generate a reaction product; and (3) carrying out gas-liquid separation on the reaction product, removing liquid ammonia from the liquid-phase product through an ammonia distillation process, and separating toluene and m-xylylenediamine through a rectification process to obtain m-xylylenediamine. According to the method, isophthalonitrile and hydrogen are used as raw materials, liquid ammonia and methylbenzene are used as reaction solvents, the raw materials and the reaction solvents are heated to 90-95 DEG C under the catalytic action of a catalyst for an exothermic reaction, m-xylylenediamine is generated through the reaction, and the reaction yield is larger than 99%.

The invention relates to a method for extracting spermidine from a natural source. The method comprises the following steps: (1) extracting a natural source substance to obtain a crude extract; and (2) carrying out hydrophilic interaction liquid chromatography purification on the crude extract to obtain spermidine. According to the method disclosed by the invention, the extract from a natural source is efficiently and accurately separated by utilizing the hydrophilic interaction liquid chromatography, so that the high-purity spermidine with a wide source is obtained to meet the requirement on high-quality spermidine.

The invention relates to the technical field of luminescent materials, in particular to a zero-dimensional organic-inorganic manganese-based halide scintillating material and a preparation method and application thereof.The preparation method comprises the following steps that manganese bromide and diisopropyl ammonium bromide are mixed and then dissolved in a mixed solvent, heating and stirring are conducted, and a precursor solution is obtained; heating after filtering, preserving heat at 60-100 DEG C, and crystallizing to separate out yellow crystals; and washing the yellow crystal with isopropanol, carrying out suction filtration, and drying to obtain the zero-dimensional organic-inorganic manganese-based halide scintillating material. According to the zero-dimensional organic-inorganic manganese-based halide scintillation material and the preparation method and application thereof, the obtained scintillation material emits bright green light under X-ray excitation, the detection limit is far lower than the standard dosage of X-ray diagnosis, and the zero-dimensional organic-inorganic manganese-based halide scintillation material has wide application prospects in the fields of high-energy physics, security inspection, medical detection and the like.

The invention discloses a crystallization process of o-chloro-p-nitroaniline, which comprises the following steps: feeding a material into a crystallization kettle to crystallize the o-chloro-p-nitroaniline, regulating and controlling the temperature in the kettle body in the crystallization process, cooling to a metastable region of the o-chloro-p-nitroaniline, preserving the heat in the metastable region for a first preset time length, and then cooling to a second preset time length; continuously cooling to a first temperature lower than the melting point of the o-chloro-p-nitroaniline, keeping the temperature at the first temperature for a second preset duration, continuously cooling to a second temperature, and outputting the material out of the crystallization kettle for filtration and separation; in the cooling process, the cooling speed in the kettle body is controlled to be 0.1-0.2 DEG C / min. According to the invention, the interior of the kettle body can be slowly cooled, and the cooling speed of each part in the kettle body can be more uniform, so that the crystallization purity and the product quality of o-chloro-p-nitroaniline are finally improved.

Disclosed in the present invention are an amine liquid purification and regeneration system and method. The system comprises a feeding pipeline for an amine liquid to be purified, a vacuum gas-stripping evaporation tank, a vacuum condenser, a vacuumizing unit and an amine liquid tank, wherein an inlet for an amine liquid to be purified, a recovered gas outlet and a discharge liquid outlet are provided on the vacuum gas-stripping evaporation tank; the feeding pipe for an amine liquid to be purified is connected to the inlet for an amine liquid to be purified; the recovered gas outlet is located at the top of the vacuum gas-stripping evaporation tank and is connected to the amine liquid tank, and the vacuum condenser is arranged on the connecting pipeline; the vacuumizing unit is in communication with the top of the vacuum condenser or the amine liquid tank; and an amine liquid stripping tower is also provided before the vacuum gas-stripping evaporation tank. The system has low waste liquid discharge, high amine recovery rate and thorough removal of heat-stable salts, and can ensure stable operation of a CO2 capture system.

The invention discloses methylamine rectification equipment, a separation and purification assembly and a purification process, and relates to the technical field of methylamine processing.The methylamine rectification equipment comprises a tower body, a skirt is arranged at the bottom of the tower body, a manhole is formed in the side face of the skirt, a drain pipe is arranged at the bottom of the tower body, a ventilation hole is formed in the side face of the skirt, and a steam ingress pipe is arranged at the bottom of the side face of the tower body; a liquid inlet pipe is arranged on the side face of the tower body, a backflow pipe and a tower body top hanging column are arranged on the two sides of the top of the side face of the tower body respectively, a steam guide-out pipe is arranged at the top end of the tower body, a gas-liquid separator is arranged on the top side of the interior of the tower body, and tower plate assemblies are vertically arranged in the tower body in a staggered mode. Moreover, when the tower plate leaks liquid, monitoring is carried out in time, process parameters are adjusted in time, in addition, the flow speed of liquid on the tower plate can be adjusted conveniently according to production requirements, and blockage clearing can be intervened in time conveniently when the tower plate is blocked.

The invention relates to the technical field of gas separation, in particular to an amine recovery monitoring method and system for polyurethane synthesis tail gas. The method comprises the following steps: preliminarily separating to obtain a triethylamine solution; collecting parameter values of different parameters for distillation of the triethylamine solution; acquiring a parameter sequence in a preset time period; decomposing the parameter sequence to obtain a periodic sequence and a trend sequence; obtaining periodic saliency values of different parameters based on the periodic sequence, and obtaining a fluctuation consistency coefficient based on the trend sequence; a distillation interference coefficient is obtained after weighting; pure triethylamine is obtained based on the distillation interference coefficient control system; collecting attribute values of different attributes, constructing a change characteristic value sequence through differences between data values and predicted values of the attributes in the sliding window, and obtaining a dehydration steady-state index based on sequence similarity and vapor pressure differences; and recycling and monitoring of triethylamine are realized based on the dehydration steady-state index. According to the method, the dehydration efficiency of the triethylamine is improved, and the purity of the recovered triethylamine is further improved.

A process for producing substantially enantiomerically pure (1R, 2S)-2, 6-dimethyl-1-aminoindan is described, said process being characterized by reacting a mixture of four stereoisomers of 2, 6-dimethyl-1-aminoindan with an acylating or carboxylating agent in the presence of a protein having lipase activity, and the method is carried out by using dynamic kinetic stereoisomer resolution.

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention discloses a method for preparing spermidine. The method comprises the following steps: dissolving oxalyl chloride and a base in a first solvent, slowly adding 4-bromo-1-butylamine hydrobromic acid, and reacting to obtain 2-((4-bromobutyl)amino)-2-oxoacetyl chloride; adding a base to the reaction solvent of the obtained 2-((4-bromobutyl)amino)-2-oxoacetyl chloride, and slowly adding 3-bromo-1-propylamine hydrobromic acid to obtain N 1 ‑(4‑Bromobutyl)‑N 2 ‑(3‑bromopropyl)oxalamide; 1 ‑(4‑Bromobutyl)‑N 2 ‑(3‑bromopropyl)oxalamide, benzylamine and a base are added to a second solvent to react to obtain 8‑benzyl‑1,4,8‑triazacyclododecane‑2,3‑dione; 8‑benzyl‑1,4,8‑triazacyclododecane‑2,3‑dione is added to an acid for hydrolysis to obtain N 1 ‑(3‑Aminopropyl)‑N 1 Benzylbutane-1,4-diamine; N 1 ‑(3‑Aminopropyl)‑N 1 Benzylbutane-1,4-diamine is added to Raney nickel / methanol, and hydrogen is passed through the reaction to obtain crude spermidine, which is then distilled to obtain pure spermidine. The preparation method of the present invention is easy to operate and safe, easy to industrial-scale production, and has a high conversion rate of spermidine and high product purity.

The invention relates to the technical field of catalysis, in particular to a green preparation process for synthesizing 4 '-chloro-2-aminobiphenyl through a membrane method.A palladium-based catalytic membrane is prepared through an impregnation method, by means of the multi-pore-channel advantage of a ceramic membrane, active components can be well distributed on the surface and in the membrane, contact of a reaction substrate and active sites is promoted, and the catalytic activity of 4'-chloro-2-aminobiphenyl is improved. The reaction effect is enhanced, the reaction efficiency is improved, the preparation process is simple, the preparation environment is mild, and large-scale production can be realized; meanwhile, the 4 '-chloro-2-aminobiphenyl is prepared by adopting a method for carrying out Suzuki-Miyaura coupling reaction by adopting the catalytic membrane, tedious steps in the traditional industry are omitted, compared with a traditional heterogeneous catalyst, the trouble of recovery is avoided, the cost is saved, the harm to the environment is greatly reduced, and compared with the prior art, the 4'-chloro-2-aminobiphenyl has a wide application prospect.

The invention provides a low-energy-consumption preparation process of tetramethylammonium bicarbonate, and relates to the technical field of chemical synthesis. The preparation process comprises the following steps: inputting trimethylamine, dimethyl carbonate and a solvent methanol into a reactive distillation tower, carrying out a quaternization reaction to generate methyl carbonate tetramethylammonium, and carrying out a hydrolysis reaction on a first liquid phase obtained by rectification and water vapor to generate TMAB; the reacted material is input into a methanol removal tower for rectification, an obtained second gas phase is heated and pressurized, one part of the second gas phase is input into a subsequent methanol recovery tower, the other part of the second gas phase exchanges heat with water to generate steam, the steam is input into a tower kettle of the methanol removal tower, and high-purity methanol is extracted from the side of the methanol recovery tower. The number of reaction equipment is reduced, and the energy utilization rate is increased; the steam grade is improved by utilizing a heat pump technology, and steam latent heat is integrated between the methanol removal tower and the methanol recovery tower through thermal coupling, so that the overall process energy consumption is remarkably reduced while the product quality is ensured.

The present application provides a method for purifying an amine salt (e.g., pentanediamine carbonate). According to the method, the amine salt (e.g., pentanediamine carbonate) is heated, flash-evaporated, and sublimed to obtain a purified gaseous amine salt (e.g., pentanediamine carbonate) which is directly used for further preparation of isocyanate (e.g., pentamethylenediisocyanate), and there is no need to use an alkaline substance to treat the amine salt to form a free-state amine for further preparation of isocyanate (e.g., pentamethylenediisocyanate). The present application further provides a method for preparing isocyanate (e.g., pentamethylenediisocyanate) from an amine salt (e.g., a pentanediamine salt) and phosgene. The present application further provides a device for implementing the method of the present application.

The invention discloses an activated carbon modification method which comprises the following steps: activating activated carbon through plasma, and then performing graft modification by using 3-amino-5-sulfydryl-1, 2, 4-triazole (AMT) to obtain the activated carbon. The method aims at solving the problems that in an existing modification process, the grafting rate is low, the adsorption performance is poor, and pores are prone to being damaged, and the method is suitable for continuous treatment of the m-phenylenediamine (MPD) oxidation color development aqueous solution. According to the process, the AMT grafting rate of the modified activated carbon is 1.0-1.2 mmol / g, the specific surface area is 950-1100 m < 2 > / g, the pore volume ratio of activated mesopores is increased to 43%, the decolorization rate is greatly increased, the saturated adsorption period of the activated carbon is prolonged, and the solution can be kept basically colorless within 120 hours by using 0.5 wt% of activated carbon under a static adsorption condition.

The invention relates to the field of anti-aging agents DTPD, and particularly discloses a preparation method of the anti-aging agent DTPD. The preparation method of the anti-aging agent DTPD comprises the following steps: mixing aniline and o-toluidine, stirring, heating to 50-60 DEG C, adding hydroquinone and a catalyst, carrying out condensation reaction at 100-250 DEG C, removing evaporated water in the reaction process, and stopping the reaction until water cannot be evaporated; cooling to 100-140 DEG C, filtering while the mixture is hot, and distilling to remove impurities, so as to obtain the anti-aging agent DTPD; the catalyst is selected from one or more of benzene sulfonic acid, benzene disulfonic acid, p-toluenesulfonic acid, p-aminobenzene sulfonic acid, aniline trisulfonic acid and sulfonated halloysite. The preparation method disclosed by the invention has the advantages of high content of effective components in the product, simplicity and convenience in operation and safety.

To provide a fluorinated aniline derivative that is suitable for use as a material for forming charge-transporting thin films for electronic components such as organic EL elements.SOLUTION: For example, fluorinated aniline derivatives are represented by the following formulae (H1) and (H2).SELECTED DRAWING: None

The invention belongs to the technical field of triethylamine dehydration, and provides a rectification method for deep dehydration of triethylamine, which comprises the following steps: mixing crude triethylamine and a sodium hydroxide solution, carrying out preliminary dehydration, carrying out three times of rectification on the pretreated triethylamine, collecting a front fraction at the tower top after each rectification, and continuously rectifying the residual material to obtain the triethylamine. Deeply dehydrated triethylamine is obtained from the tower kettle after the third rectification; the water content of the deeply dehydrated triethylamine is less than or equal to 0.2%. According to the invention, the crude triethylamine is refined by adopting a method of combining chemical dehydration and rectification; in the rectification process, the characteristic that triethylamine and water are azeotropic at 75.8 DEG C is utilized, water can be removed from tower top fraction discharge, the water content of a tower kettle material triethylamine is controlled to be lower than 0.2%, and the requirement for recycling glyphosate is met; compared with a solid caustic soda dehydration method, the method disclosed by the invention is environment-friendly, and compared with a direct rectification method, the method disclosed by the invention is small in heat loss and low in cost; and continuous intelligent operation can be realized.

The invention discloses a method for extracting and separating N-methylaniline and N, N-dimethylaniline, and relates to the technical field of organic compound separation.The method comprises the steps that a reaction product of aniline and methyl alcohol is taken and fed into an adsorption refiner to be adsorbed, and a mixture A is obtained; feeding the mixture A into a light component removal tower for light component removal, collecting at the top of the light component removal tower to obtain light components, feeding the light component removal tower into a heavy component removal tower for heavy component removal, and collecting at the top of the heavy component removal tower to obtain a mixture B; taking the mixture B, feeding from the middle part of an extractive distillation tower, taking an extracting agent, feeding from the upper part of the extractive distillation tower, and performing extractive distillation; collecting the N, N-dimethylaniline at the top of the extractive distillation tower to obtain N, N-dimethylaniline, and collecting the N, N-dimethylaniline at the bottom of the extractive distillation tower to obtain an N-methylaniline mixed solution; feeding the N-methylaniline mixed solution into a desorption tower for desorption; collecting at the top of the desorption tower to obtain N-methylaniline, and collecting at the bottom of the desorption tower to obtain the extracting agent.

The invention provides asymmetric quaternary ammonium base as well as a preparation method and application thereof, and belongs to the technical field of organic chemistry. Comprising the following steps: mixing halide and tri-n-propylamine, adding into a solvent, heating and stirring for reaction, removing the solvent under reduced pressure, dissolving into water to prepare a solution, and preparing the asymmetric quaternary ammonium base by using bipolar membrane electrodialysis. According to the preparation method of the asymmetric quaternary ammonium base, firstly, the asymmetric quaternary ammonium salt is prepared through a chemical synthesis method, then the asymmetric quaternary ammonium base is prepared through bipolar membrane electrodialysis, the preparation method is simple and efficient, the prepared product is high in yield and mild in condition, and the asymmetric quaternary ammonium base can serve as a template agent to be used in the preparation process of a molecular sieve; wide application prospects are realized.

The invention relates to a method and a device for recycling anhydrous triethylamine. The method comprises the following steps: S1, transferring wastewater containing triethylamine salt into a first reaction kettle; adjusting the pH value of the wastewater through hydrochloric acid; the mass concentration of the triethylamine salt in the wastewater is concentrated through steam heating; s2, after the wastewater is cooled, adjusting the pH value of the wastewater through caustic soda flakes; s3, standing the wastewater to layer the wastewater, and transferring water-containing triethylamine on the upper layer into a second reaction kettle; s4, adding caustic soda flakes into the water-containing triethylamine, stirring, standing, and distilling the water-containing triethylamine on the upper layer; s5, the second fraction at the temperature above the first temperature is the anhydrous triethylamine. According to the method and the device for recycling the triethylamine, the efficient recycling of the triethylamine can be realized, the recycling rate can reach 95 percent or above, and meanwhile, the water content in the recycled triethylamine is ensured to be lower than 0.05 percent.

The invention discloses a method for preparing long-chain fatty primary amine, which comprises the following steps of: conveying halogen, sodium hydroxide and long-chain fatty amide slurry which are mixed and fully reacted at low temperature into a micro-channel reactor, and initiating partial vaporization of a solvent to form gas-liquid Taylor flow through rapid overheating of reaction liquid; after the reaction is finished, rapidly cooling through a cooling section, entering a continuous extractor, carrying out continuous liquid-liquid separation on an effluent mixed solution, and distilling an organic phase to obtain a high-purity long-chain fatty primary amine product. The method can effectively solve the problems of many side reactions, poor selectivity, tedious steps, low production efficiency and the like in the existing kettle type process, significantly improves the yield and selectivity of the target product, reduces the treatment cost of three wastes, and has the advantages of simple operation, efficient reaction, intrinsic safety and the like.

The invention discloses a co-production technology of N-N-dimethylaniline and hydrogen. The whole reaction technology comprises raw material conveying. The technology comprises a storage tank, a heat exchanger, a methylation reactor, a gas-liquid separator, a booster pump, a rectifying tower, a pump and an intermediate tank. And a plurality of unit operations are organically combined to form a whole set of complete process technology. By using aniline and methanol as raw materials, co-production of N-methylaniline, N, N-dimethylaniline and hydrogen can be realized.

The invention discloses an organic-inorganic hybrid zero-dimensional halide perovskite single crystal material and a preparation method thereof. The chemical formula of the organic-inorganic hybrid zero-dimensional halide perovskite single crystal material is PMA4InCl7.H2O, and the chemical formula of the antimony-doped single crystal material is PMA4InCl7.H2O: Sb, the corresponding single crystal material is obtained through the steps of raw material adding, cooling crystallization, suction filtration, drying and the like. The optical band gap of the PMA4InCl7. H2O is determined to be 4-5 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O shows light blue; the optical band gap of the PMA4InCl7. H2O: Sb is determined to be 3-4 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O: Sb is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O: Sb shows bright yellow. The maximum quantum yield measured by an absolute fluorescence quantum yield spectrometer can reach 72%.

This invention relates to the field of synthesis and discloses a method for synthesizing hexamethylenediamine and co-producing cyclohexylimine. The method includes: (1) ammonolysis: bis(hexamethylene)triamine undergoes an ammonolysis reaction in the presence of an ammonolysis catalyst, ammonia, and hydrogen; wherein the ammonolysis catalyst contains active components Ni, La, and In; (2) the material obtained from the ammonolysis reaction is sequentially subjected to cyclohexylimine separation and hexamethylenediamine separation. This method can simultaneously obtain hexamethylenediamine and cyclohexylimine, and exhibits high reactivity, high conversion rate, and high selectivity.

The invention belongs to the technical field of production of vinylene carbonate, and particularly relates to a rectification and purification system for water-containing triethylamine. Comprising a triethylamine azeotropic module, a triethylamine rectification module and a wastewater recovery module, wherein the triethylamine azeotropic module is used for impurity removal and primary water separation of a water-containing triethylamine solution; the triethylamine rectification module is connected with the triethylamine azeotropic module, and the triethylamine rectification module is used for purifying a water-containing triethylamine solution to produce a qualified triethylamine solution; the wastewater recovery module is connected with the triethylamine azeotropic module and the triethylamine rectification module, and the wastewater recovery module is used for wastewater recovery and sewage treatment of the triethylamine azeotropic module and the triethylamine rectification module. According to the method, impurities and polymers are separated in an azeotropic mode, meanwhile, the triethylamine yield and the continuous processing efficiency are improved, frequent cleaning of equipment is not needed, and the working efficiency is improved.