222 results about "Disproportionation" patented technology

The invention discloses a sulfur disproportionation-mediated low-temperature high-efficiency low-carbon denitrification and synchronous ammonium recovery method for sewage, belongs to the field of sewage treatment, and aims to solve the problems that an existing autotroph denitrification process cannot adapt to water quality fluctuation and seasonal variation and is poor in engineering applicability. Polyculture denitrification and elemental sulfur disproportionation (SD) are used as an effective enhanced denitrification scheme and are applied to a low-temperature SDAD system of actual sewage. Sulfide and polysulfide generated in situ through elemental sulfur disproportionation reaction and low-concentration sodium acetate under the polyculture condition are used as supplementary electron donors, so that the denitrification rate is remarkably increased. The process of reducing dissimilatory nitrate into ammonium (DNRA) in the SD-MixBNR system is beneficial to emission reduction of greenhouse gases while realizing ammonium recovery. According to the method, the SD-MixBNR system can be promoted to be widely applied to actual engineering projects under the carbon neutralization background, and the stability and adaptability of the SD-MixBNR system in the face of various water quality fluctuations and seasonal changes are enhanced.

The invention discloses a La < 3 + >-doped lithium manganese oxide lithium ion sieve as well as a preparation method and application thereof, and belongs to the technical field of salt lake lithium extraction. The preparation method comprises the following steps: by taking Mn2O3 and LiOH as raw materials, carrying out hydrothermal reaction to generate LiMnO2, mixing the LiMnO2 with La2O3, grinding and calcining to form a La < 3 + >-doped spinel structure precursor La-LMO, and carrying out acid pickling to prepare La-HMO. La < 3 + > replaces part of Mn < 3 + >, the average valence state of manganese is improved, meanwhile, the structural stability of the manganese is enhanced through the high bond energy of La-O bonds, the number of exposed manganese atoms is reduced, manganese solution loss caused by Mn < 3 + > disproportionation reaction in the acid treatment process is effectively inhibited, the adsorbed oxygen content and active sites are increased, and the lithium ion adsorption capacity is remarkably improved. The material has high-selectivity adsorption capacity on lithium ions in salt lake brine in a strong alkaline environment, the manganese solution loss rate is obviously lower than that of traditional HMO, the cycle life is remarkably prolonged, and the industrial application potential is remarkably improved. The preparation process of the lithium ion sieve is simple, the raw material cost is low, and the technical bottlenecks that an existing manganese-based lithium ion sieve is poor in structural stability and high in manganese solution loss are solved.

The invention discloses a preparation method of a modified zinc-bromine flow battery carbon felt negative electrode and the carbon felt negative electrode prepared by the method, and belongs to the field of zinc-bromine flow batteries. According to the method, after the carbon felt is soaked in a mixed solution of cuprous sulfate, water and acetonitrile, the acetonitrile is gradually evaporated from the solution through heating, the cuprous sulfate is gradually subjected to disproportionation reaction, and the copper elementary substance generated by the disproportionation reaction of the cuprous sulfate is deposited on the surface of the carbon felt, so that the purpose of loading the modified carbon felt with the copper elementary substance is achieved. The copper elementary substance is relatively stable in chemical property and has good zinc affinity, and the copper elementary substance is loaded on the surface of the carbon felt, so that the overpotential of zinc nucleation can be reduced, and reaction active sites on the surface of the carbon felt are increased. Besides, relatively strong acting force exists between copper and zinc, so that uniform deposition / stripping of zinc in the charging and discharging process is facilitated, a more uniform zinc deposition layer is formed on the surface of the carbon felt, formation of zinc dendrites is reduced, and the electrochemical performance of the zinc-bromine flow battery is improved.

The invention provides a method for resource regeneration of denitration manganese slag, and belongs to the technical field of energy conservation and environmental protection. The method comprises the following steps: mixing the denitration manganese slag, a powdery additive and hydrogen peroxide, carrying out a first oxidation reaction, and carrying out solid-liquid separation to obtain filter residues; mixing the filter residue with an alkaline solution to obtain a mixture, introducing air into the mixture, carrying out a second oxidation reaction and solid-liquid separation to obtain a filtrate, and evaporating the filtrate to dryness to obtain a concentrated solid; the main component of the concentrated solid is K2MnO4; dissolving the concentrated solid in water, pressurizing, introducing mixed gas, and carrying out disproportionation reaction to obtain a Mn-containing mixture; the Mn-containing mixture comprises MnO2 (manganese dioxide) and KMnO4 (potassium manganese oxide). According to the method, the comprehensive utilization of the Mn element is realized through primary oxidation, secondary oxidation and valence state separation, and the purification of resource products is realized through a green process flow.

The present invention provides a method for preparing dimethyldichlorosilane. The method comprises: performing a cracking and disproportionation reaction on high-boiling substances produced as a by-product in the production of an organosilicon monomer dimethyldichlorosilane under the action of a Ni@ZSM-5 catalyst encapsulating nickel nanoparticles to prepare dimethyldichlorosilane. The method not only solves the problem of a large amount of excess high-boiling substances in the production process of the organosilicon monomer and realizes high-value utilization of the high-boiling substances, but also has easy-to-control reactions, simple processes, and mild conditions. Moreover, the method has a single-pass conversion rate of the high-boiling substances of ≥90%, and a selectivity for dimethyldichlorosilane of ≥70%, thus having broad prospects for industrial application.

The invention relates to the technical field of superfine molybdenum powder preparation, in particular to a preparation device and method for low-oxygen superfine molybdenum powder. The specific preparation device comprises a sublimation bin, a reaction area and a gas-solid separation bin which are sequentially connected, the reaction zone comprises a preheating zone, a reduction zone and a conversion zone; a part of the hydrogen pipeline and a part of the carbon monoxide pipeline are arranged in the preheating area; one end of the hydrogen pipeline extends to the reduction area and is used for providing preheated hydrogen and carrying out gas-phase reduction reaction on the preheated hydrogen and the gas-phase MoO3 subjected to heat preservation; one end of the carbon monoxide pipeline extends to the conversion area and is used for providing preheated carbon monoxide and reacting with water vapor to complete primary water vapor conversion; meanwhile, partial carbon monoxide is subjected to a disproportionation reaction to generate micro carbon powder, and the micro carbon powder and water vapor are subjected to a water gas reaction to complete secondary water vapor conversion. The problem that the oxygen content of existing superfine molybdenum powder prepared through gas-phase molybdenum trioxide reduction is too high is solved.

[Problem] To provide a method capable of producing a monocyclic aromatic hydrocarbon such as benzene or xylene effective as a base raw material, with a naphtha raw material containing renewable naphtha. [Solution] A method for producing at least one monocyclic aromatic hydrocarbon of benzene or xylene with a naphtha raw material containing renewable naphtha, the method including step (A-1) of pyrolyzing the naphtha raw material in the presence of water vapor, to produce and separate toluene, and step (A-2) of subjecting toluene to disproportionation reaction or transalkylation reaction, to produce and separate at least one monocyclic aromatic hydrocarbon of benzene or xylene.

The system comprises a gradient catalytic reaction rectifying tower and a temperature control system, the rectifying tower is sequentially provided with a rectifying section, a reaction section and a stripping section from top to bottom, the reaction section is filled with an ion exchange resin solid catalyst, and the stripping section is filled with an ion exchange resin solid catalyst. The radiuses of the catalyst bag units are distributed in a gradient mode from small to large along the height of the tower, the catalyst bag units have the functions of catalytic reaction and mass transfer separation, the rectifying section and the stripping section are filled with structured packing or high-separation-capacity metal wire mesh packing, a gas-liquid separator is arranged at an outlet of the stripping section, and a temperature control system achieves segmented monitoring through a multi-point temperature sensor. The surface of the catalyst can be subjected to functional treatment to improve the decomposition resistance; the method comprises the following steps: feeding trichlorosilane generated by cold hydrogenation into the upper part of a reaction section from a feed port, carrying out disproportionation reaction at the gradient temperature of 20-100 DEG C and the pressure of 0.3-0.6 MPa according to the reflux ratio of (15-30): 1 to generate silane, and carrying out rectification and extraction separation to obtain high-purity silane with the purity of 99.999% or above.

Disclosed is an external acceleration system for a biological denitrification process during wastewater treatment, including a biological denitrification mechanism, a denitrification acceleration mechanism, and a water circulation mechanism, where the biological denitrification mechanism includes a biological denitrification tank, a three-way valve, a wastewater assembly, and a water inlet pipe; the denitrification acceleration mechanism includes a denitrification accelerator and an assembly for enhancing the sulfur disproportionation reaction; the water circulation mechanism includes a first water delivery pump, a first water delivery pipe, a second water delivery pipe, and a second water delivery pump. The external acceleration system for a biological denitrification process during wastewater treatment spatially and temporally separates the sulfur disproportionation reaction process from the biological denitrification process so that the two processes do not interfere with each other and mutually promote the denitrification effect, which is beneficial to ensure the high efficiency and stability of the denitrification effect. The independently provided denitrification accelerator releases the coupling of the sulfur disproportionation reaction and the autotrophic denitrification reaction in the related art and has a high adaptability to various denitrification systems.

A method for reducing a substrate selected from 2-methyl-5-nitropyridine and methyl 4-(2-fluoro-3-nitrobenzyl)piperazine-1-carboxylate is provided catalysed by a nitroreductase and a disproportionation agent.

The electronic-grade silane gas continuous production preparation system comprises a cold hydrogenation treatment device, an inlet of the cold hydrogenation treatment device is connected with a raw material supply system, and an outlet of the cold hydrogenation treatment device is connected with a cold hydrogenation rectifying tower through a pipeline. The cold hydrogenation rectifying tower is sequentially connected with the boron and phosphorus removal adsorption column, the first-stage disproportionator, the first tower, the second tower, the second-stage disproportionator, the third tower and the fourth tower through pipelines, and electronic-grade silane in the fourth tower is used for being conveyed to a silane tank area; the first tower is used for removing silicon tetrachloride produced after the disproportionation reaction of the first-stage disproportionator; the second tower is used for separating the extracted chlorosilane material; the third tower is used for separating silane from chlorosilane; and the fourth tower is used for discharging light impurities and heavy impurities and conveying gas-phase electronic-grade silane into a silane tank area. The device and the method realize continuous, efficient and high-purity production of the electronic-grade silane gas, and have the advantages of low energy consumption, low cost, thorough impurity removal and the like.

The invention relates to a non-sulfur-tolerant wide-temperature shift regulation and control process based on a coal natural gas methanation process, and belongs to the technical field of coal chemical industry. The process comprises the following specific steps: carrying out non-sulfur-tolerant wide-temperature shift reaction on purified raw materials for methanation reaction, namely carrying out adiabatic and / or isothermal CO shift reaction under the conditions that the temperature is 200-360 DEG C, the pressure is 1-10 MPa, the molar ratio of H2O to CO is 0.7-2 and the air speed is 3000-40000h <-1 >, reducing the CO concentration at the inlet of a methanation reactor by 30-70%, and then carrying out high-temperature reaction on the methanation reaction to obtain the high-sulfur-tolerant methanation reaction. The CO disproportionation reaction in the methanation reactor is avoided while the circulating gas is effectively reduced, the service life of the existing methanation catalyst is prolonged by more than 50%, and the shutdown frequency and the maintenance time are greatly reduced.

The invention relates to a preparation method of alkyl naphthalene and a modified ionic liquid catalyst used in the preparation method. The modified ionic liquid catalyst is obtained by modifying ionic liquid Et3NHCl-AlCl3, Et3NHCl-FeCl3 or Et3NHCl-ZnCl2 with carbon disulfide. The preparation method of the alkyl naphthalene comprises the following steps: enabling naphthalene, cyclopentene and alpha-olefin to react under the action of the modified ionic liquid catalyst in the claim 1, and then performing post-treatment to obtain an alkyl naphthalene product. The carbon disulfide is used for modifying the ionic liquid Et3NHCl-AlCl3, Et3NHCl-FeCl3 or Et3NHCl-ZnCl2, the Lewis acidity of the modified ionic liquid is reduced, and when the modified ionic liquid is used for alkylation reaction of naphthalene, cyclopentene and alpha-olefin, side reactions such as disproportionation can be reduced, and the conversion rate of naphthalene is increased. In addition, the modified ionic liquid catalyst is easier to separate from a reaction mixture, and purification of a target product is facilitated.

The invention relates to the field of silane production, and discloses an energy-saving type silane production and purification system which comprises a production unit used for converting trichlorosilane into silane gas and a chlorosilane compound and carrying out preliminary separation treatment on the silane gas and the chlorosilane compound. According to the invention, a disproportionation reaction rectification method is adopted, after pressurization by a compressor, the temperature and pressure of silane gas and other chlorosilane compounds are increased, and the boiling point of the chlorosilane compounds is increased, so that the chlorosilane compounds are more easily liquefied at a higher temperature, more effective condensation and separation in a precooler are facilitated, and the yield of the chlorosilane compounds is improved. And through the cooling effect of the precooler, part of the chlorosilane compound is condensed into a liquid state, so that preliminary separation of the chlorosilane compound and gaseous silane gas is realized, part of impurities are removed in advance, the content of the impurities entering the silane separation tower is reduced, and the separation efficiency of the separation tower is improved.

The invention discloses a method for regenerating a toluene disproportionation catalyst, which is characterized by comprising the following steps of: contacting the toluene disproportionation catalyst to be regenerated with oxygen-containing gas in a rotary roasting kiln for roasting at the roasting temperature of 400-700 DEG C, preferably 550-600 DEG C; the time is 10 to 60 minutes, preferably 30 to 40 minutes. The catalyst is in rapid contact with oxygen in a rotary roasting kiln, the scorching temperature is high, the contact time is short, the inactivated disproportionation reaction catalyst can be effectively and completely activated, and meanwhile the specific surface area of the catalyst is increased.

The invention relates to the technical field of composite gas diffusion layers, in particular to a corrosion-resistant composite gas diffusion layer and a preparation method and application thereof. The preparation method comprises the following steps: mixing alkaline metal molten salt and a chromium-containing active substance to obtain mixed active alkaline metal molten salt; preheating the microporous layer to obtain a preheated microporous layer; heating the mixed active alkaline metal molten salt in a vacuum environment to obtain a mixed active melt; the preheated microporous layer is immersed in the mixed active solution for a disproportionation reaction, and a crude product composite gas diffusion layer is obtained; cooling the crude product composite gas diffusion layer, and purifying to obtain the composite gas diffusion layer; the raw material of the microporous layer comprises carbon nanotubes, and the raw material of the substrate layer comprises carbon fibers; the weight m1 of the alkaline metal molten salt and the weight m2 of the chromium-containing active substance meet the relational expression: m1: m2 = (5: 1)-(10: 1). According to the preparation method, the corrosion resistance and the porosity of the composite gas diffusion layer can be synchronously improved.

This disclosure relates to a method for producing composite particles. The method comprises contacting catalyst particles, an oxidizing agent, and a plurality of monomers. The oxidizing agent is a peroxide, a persulfate, or ozone, and the catalyst particles are or comprise a material having Fenton or Fenton-like catalytic activity. The catalyst particles catalyze the disproportionation of the oxidizing agent to produce oxygen-radical species, which then initiate a polymerization reaction, thereby polymerizing the plurality of monomers, thereby forming a polymer shell around the catalyst particles. The present invention extends to composite particles produced by the method, an apparatus containing the composite particles, and the use thereof.

An integrated catalyst can be used in an olefin disproportionation reaction. The integrated catalyst contains a plurality of different integrated active phases. The relative positions among different active phases remain substantially unchanged during the olefin disproportionation reaction. The effective distance between respective bisecting planes of two adjacent different active phases is 0.5-5 mm, preferably 1-3 mm.

This invention discloses a superhydrophobic unsaturated transition metal chalcogenide compound, its synthesis method, and its applications. The invention involves heating chalcogenide powder to above its melting temperature to form a molten chalcogenide. This molten chalcogenide is then mixed with a reducing agent to undergo a disproportionation reaction. A strongly acidic solution containing transition metal cations is then added for aging, yielding a transition metal chalcogenide compound with a uniform porous structure, numerous surface defect sites, and a superhydrophobic surface. This transition metal chalcogenide compound exhibits good water resistance and high selective adsorption performance for nonpolar atoms and molecules, making it suitable for the removal of heavy metals or oxides from high-humidity flue gas. Furthermore, its unique porous structure and numerous catalytically active sites demonstrate good adsorption, capture, and catalytic conversion activity for oxidizing gases, making it suitable as an electroreduction catalyst.

The application discloses a preparation method of a lightweight oxidation-resistant coating on a carbon-based composite material surface, which comprises the following steps: brushing a slurry containing a carbon source on the surface of the carbon-based composite material, solidifying, forming a carbon source transition layer on the surface of the carbon-based composite material, and then performing a molten salt assisted infiltration treatment on the surface of the carbon source transition layer to obtain the lightweight oxidation-resistant coating. The preparation method of the application provides the carbon source for the subsequent process by pretreating the carbon-based composite material, and adds a suitable reinforcing phase to improve the bonding force between the coating and the substrate. Then, the molten salt disproportionation reaction is used to prepare the coating, the thickness and microstructure of the coating are strictly controlled by controlling the infiltration process, and finally, the smooth, uniform and dense lightweight oxidation-resistant carbide ceramic sealing layer is obtained. In the oxidation process, a glassy film is formed to seal the surface oxygen diffusion channel, the short-term ablation resistance is excellent, and the lightweight high-strength requirement of aerospace vehicles can be met.

The invention discloses a method for quickly enriching sulfur disproportionated bacteria, which is characterized in that the concentration of hydrogen sulfide in a reaction system is stably controlled below 40mg-S / L by optimizing culture conditions, including but not limited to the technical means of improving the replacement frequency of a disproportionated bacteria culture solution, adopting gas stripping and the like, so that the quick enrichment of sulfur disproportionated bacteria is realized. Compared with the prior art, an elemental sulfur biological filter does not need to be additionally built, and the operation process is simplified; the use of nitrate is avoided, and the management risk of chemicals easy to explode is avoided; the relative abundance of the sulfur disproportionation bacteria is remarkably improved, and an efficient, economical and feasible technical scheme is provided for large-scale application of the sulfur disproportionation reaction in sewage treatment.

The invention relates to the field of petrifaction and discloses a Mo-W heteronuclear bimetallic composite carrier catalyst as well as a preparation method and application thereof. The Mo-W heteronuclear bimetallic composite carrier catalyst comprises an Al2O3-SiO2 composite carrier with a three-dimensional ordered macroporous structure, and Mo-W heteronuclear bimetallic which is uniformly dispersed and loaded on the composite carrier in situ, wherein Mo and W are respectively combined with the surface of the composite carrier through Mo-O-Si and W-O-Al to form charge gradient polarization sites, the valence state of Mo is + 4 to + 6, and the valence state of W is + 4 to + 6. The catalyst provided by the invention has a good mass transfer effect, can give consideration to both acidic site density and metal dispersibility, and has high conversion rate, high selectivity and strong carbon deposition resistance when being applied to toluene disproportionation, aromatic hydrocarbon transalkylation, heavy aromatic hydrocarbon lightening and other reactions.

The present application relates to a kind of purification method of nitric oxide gas, comprising the following steps: crude nitric oxide gas is imported into extraction column, and the extraction phase obtained after extraction is imported into resolution column for temperature resolution;Nitric oxide gas resolved is imported into ethanol absorption tower after alkali washing tower and condenser;Again imported into the adsorption tower filled with 13X molecular sieve;After adsorption, the gas is collected into product collection bottle, and the purity of more than 99.99% nitric oxide product is obtained.The present application uses ferrous sulfate solution as extractant, extracts refined nitric oxide, realizes the efficient extraction of nitric oxide by the coordination reaction of ferrous ion and nitric oxide in the purification process, then uses ethanol as absorbent, utilizes the significant difference in solubility of nitric oxide and nitrous oxide in ethanol, can selectively absorb the nitrous oxide impurity difficult to remove, finally uses 13X molecular sieve to further remove nitrous oxide, which is beneficial to reduce disproportionation reaction and improve product purity.

To effectively suppress or mitigate propagation of a disproportionation reaction of hydrofluoroolefin without being significantly affected by the configuration of a compressor.SOLUTION: In the present invention, a motor unit of a compressor is provided with a plurality of passages whereby a upper space and a lower space inside a sealed container are in communication. A total cross-sectional area of all passages (rotor passages) provided in a rotor of the motor unit is defined as A, a total cross-sectional area of all passages (non-rotor passages) provided outside the rotor is defined as B, a total heat transfer area of all the rotor passages is defined as C, a total heat transfer area of all the non-rotor passages is defined as D, and a cross-sectional area of the sealed container based on an inner diameter thereof is defined as S. In the compressor, A≥B, C≥D, a ratio C / S is 1.0 or more (C / S≥1.0), or a ratio (A+B) / S is 0.05 or more ((A+B) / S≥0.05).SELECTED DRAWING: Figure 2

The application discloses a kind of continuous co-production diphenyl dichlorosilane and triphenyl chlorosilane method and system, belong to organic silicon monomer synthesis technical field.The method will silicon powder and chlorobenzene direct method synthesis high-temperature gas phase product, after cyclone separation precision filtration dust removal, in turn through cascade condensation, obtain rich one phenyl trichlorosilane stream;It is directly introduced into disproportionation reaction kettle, and aluminium trichloride catalyst is added to carry out disproportionation and redistribution reaction;After reaction, add tertiary butyl alcohol, make aluminium trichloride into solid tertiary butyl alcohol aluminum, and remove by solid-liquid separation;Filtrate is separated by reduced pressure distillation, ultra vacuum distillation, and high-purity diphenyl dichlorosilane and triphenyl chlorosilane are obtained.The process coupling is closely, and heat energy is reasonably utilized, and catalyst treatment is green and environmental protection, and no strong corrosive gas and chlorine-containing wastewater is generated, the yield and selectivity of high value-added phenyl chlorosilane monomer are significantly improved, and the process is continuous and stable, with high degree of automation, suitable for large-scale industrial production.

This invention provides an activation method for a liquid fatty amine, a preparation process for the liquid fatty amine and silane, wherein the liquid fatty amine has a tertiary amine group; the activation method involves activating the liquid fatty amine with silicon tetrachloride; this method can significantly improve the catalytic effect of the liquid fatty amine, and the activated liquid fatty amine exhibits higher catalytic activity in the process of disproportionation of trichlorosilane to prepare silane, which can effectively reduce the reaction activation energy, increase the reaction rate, and improve the single-pass reaction efficiency and conversion rate.

The invention provides an electric furnace thermal reduction magnesium smelting co-production silicon carbon negative electrode material and a device thereof. MgO, SiO2, coke, biological pyrolytic carbon and methane gas are used as raw materials and are added into a magnesium smelting electric arc furnace for carbon thermal reduction to obtain mixed furnace gas; the mixed furnace gas enters a quenching condenser to be subjected to isentropic expansion and cooling treatment after being subjected to heat compensation through a heat compensation chamber, and solid-phase particles and cooling furnace gas are obtained; the solid-phase particles and the cooling furnace gas are cooled by a first cooling chamber to obtain ternary mixed powder, and the ternary mixed powder is subjected to the operations of metal magnesium vacuum distillation, magnesiothermic reduction and silicon monoxide disproportionation reaction offline; residual gas in the first cooling chamber is secondarily cooled through the second cooling chamber, and a primary material required by the silicon-carbon negative electrode material is co-produced in a gas-phase reaction mode in the magnesium smelting process, so that near-full continuous production of main links of the silicon-carbon negative electrode material and co-production coupling of carbon thermal reduction of magnesium metal are realized.

The present application belongs to the field of refinery dry gas utilization, and discloses a system and method for preparing propylene by disproportionation of refinery dry gas. The system comprises a raw material pretreatment unit, a disproportionation reaction unit and a product separation unit. The raw material pretreatment unit comprises, in sequence, an alkali washing package, a dry gas compressor, a dry gas absorption tower, a first desorption tower, a second desorption tower and a circulating carbon four cooler. The disproportionation reaction unit comprises a disproportionation reactor inlet-outlet heat exchanger, a disproportionation reactor and a reaction outlet cooler. The product separation unit comprises a deethanizer, a propylene rectification tower, a reaction separation tail gas absorption tower and a remaining carbon four cooler. The system and method can reduce the consumption of carbon four raw material, improve the recovery rate of ethylene in refinery dry gas and reduce consumption.

This invention belongs to the field of chemical catalyst preparation technology, and discloses a catalyst for the disproportionation of diethylamine to triethylamine. The catalyst includes a support, and MgO, ZnO, and rare earth oxides supported on the support. The content of each component, based on 100% mass, is as follows: support 80-85%, MgO 5-10%, ZnO 5-10%, and rare earth metal oxides 2-5%. When used for the disproportionation of diethylamine to triethylamine, the catalyst exhibits high diethylamine conversion and high selectivity for the triethylamine product. After separation, unreacted diethylamine can be recycled, while monoethylamine is collected separately or recycled back to the diethylamine synthesis unit, significantly reducing overall costs.

The invention relates to the technical field of distillation tower external equipment, and discloses a device for improving disproportionation reaction efficiency, which comprises a reboiler shell, one end of the reboiler shell is fixedly connected with an end cover through a flange, and the upper surface and the lower surface of the end cover are fixedly connected with a steam pipe and a condensate pipe respectively. The upper surface of the middle of the reboiler shell is fixedly connected with a gas phase pipe, and the bottom face of the end, away from the end cover, of the reboiler shell is fixedly connected with a liquid phase pipe. According to the device for improving the disproportionation reaction efficiency, through the matched design of the arc-shaped baffle and the bent pipe in the mixing box, phenol and DMC materials are subjected to hedging mixing in the spraying process, the mixing time is remarkably shortened, and the initial contact uniformity of reactants is improved; the double defoaming nets are matched with the floating pipe to automatically adjust along with the liquid level, so that foams in a gas-liquid mixture can be efficiently broken and removed, and the gas phase loss is reduced.