432 results about "Chemical technology" patented technology

The invention provides a multi-modal characterization molecular property prediction method based on hierarchical bidirectional cross attention, and relates to the technical field of machine learning assisted organic chemistry, and the method comprises the following steps: S10, generating same-molecule multiple sequences for data enhancement; s20, coding the sequence features through a pre-trained molecular language model MolBERT; s30, performing multi-modal feature fusion through a layered bidirectional cross attention mechanism; s40, establishing a prediction head; s50, in the reasoning stage, only the feature extraction and fusion steps are executed, and a molecular property prediction result is output through the trained prediction head. According to the method, the molecular sequence, the topological graph structure and the fingerprint features are effectively integrated, so that the prediction precision of the model on a plurality of MoleculeNet (molecular network benchmark) public data sets is superior to that of an existing method.

The invention relates to the technical field of chemical engineering, and discloses a trichlorosilane hydrogen reduction polycrystalline silicon growth monitoring system fusing multi-source data. Comprising a multi-sensor monitoring module, a multi-sensor data acquisition module, a multi-source data preprocessing module, a growth process data analysis module, a growth state online evaluation module, a process parameter online regulation and control module, a regulation and control result feedback module and a system collaborative management module, the multi-sensor monitoring module monitors the growth process of trichlorosilane hydrogen reduction polycrystalline silicon through multiple sensors, the multi-sensor data acquisition module acquires original data, the multi-source data preprocessing module preprocesses the data, the growth process data analysis module carries out data calculation, and the growth state online evaluation module carries out online comprehensive evaluation. The process parameter online regulation and control module regulates and controls process parameters online, the regulation and control result feedback module generates an adjustment strategy, and the system collaborative management module performs system parameter recording and storage, system optimization and exception handling.

This invention belongs to the field of chemical technology and discloses a high-toughness, fracture-resistant foamed composite mat and its processing technology. The high-toughness, fracture-resistant foamed composite mat and its processing technology include a mat body with a thickness of 3-15 mm, comprising two or more soft elastic foam layers; at least one reinforcing layer is disposed between adjacent soft elastic foam layers. This high-toughness, fracture-resistant foamed composite mat and its processing technology solve the core problems of insufficient toughness and easy breakage when bent in existing PU foamed yoga mats, crawling mats, and other similar products: through the structure of the PU foam layer and the reinforcing layer interlaced, the excellent toughness and tensile strength of the reinforcing layer are utilized to disperse the stress generated when the yoga mat is bent, avoiding cracking and breakage of the PU foam layer due to stress concentration, thus solving the problems mentioned in the background art.

This invention discloses a controlled-release solid film formulation for pesticides, its preparation method, and its applications. This invention upgrades pesticides from liquid / powder formulations to solid film formulations, utilizing the solid film to physically block pesticide drift, diffusion, and loss, reducing off-target effects at the source. Through the combined use of physical and chemical techniques, pesticides are uniformly distributed within the solid film, and the pesticide release cycle is synchronized with the solid film degradation, achieving precise controlled release. This solid film formulation is applied from the beginning of crop growth, synchronized with the plant growth cycle, providing early preventative effects through quantitative controlled release of pesticides. This solid film formulation also functions as a mulch film; its preparation process is simple and easy, it is completely degradable and requires no recycling, reducing costs. The identification method of this invention utilizes selective precipitation separation technology, achieving high pesticide extraction efficiency of 95%-98%, especially suitable for low water-soluble pesticides. The drug identification process is simple to operate: the entire process takes less than 4 hours, requires no complex purification steps, and is suitable for batch sample processing.

The present application relates to the chemical technology field, specifically to a kind of β-naphthalenesulfonic acid sodium formaldehyde condensate and preparation method thereof, the preparation method is prepared naphthalenesulfonic acid mixture with naphthalene and sulfuric acid as raw material, β-naphthalenesulfonic acid in naphthalenesulfonic acid mixture is extracted by melt crystallization, β-naphthalenesulfonic acid is sequentially subjected to condensation reaction, neutralization reaction and purification step, and β-naphthalenesulfonic acid sodium formaldehyde condensate is obtained.The present application extracts β-naphthalenesulfonic acid from naphthalenesulfonic acid mixture by melt crystallization method, which has high purity and high yield, and avoids removing α-naphthalenesulfonic acid by hydrolysis reaction and recycling the generated naphthalene, without using lime for impurity removal, thereby avoiding the introduction of calcium and magnesium ions and other impurities.The operation steps of the present application for preparing β-naphthalenesulfonic acid sodium formaldehyde condensate are simpler than traditional methods, and the product quality and economy of β-naphthalenesulfonic acid sodium formaldehyde condensate are improved.

The application discloses a preparation method of an indoline compound based on organic electrosynthesis, and belongs to the technical field of pharmaceutical chemical engineering and related chemistry. The method uses simple arylamine and halogenated olefin as raw materials, and prepares the indoline compound under the electrolysis of an electrode, so that green and efficient synthesis of the indoline compound is realized. The method has the advantages of low cost, high selectivity, mild reaction condition, good functional group compatibility, wide substrate range and environmental friendliness. The indoline compound is an important organic synthesis intermediate, and has a very wide application in the fields of fine chemical engineering and pharmacy. The preparation method has great application value and social and economic benefits.

This application discloses an integrated method and system for the co-production of MTO methanol and refined methanol, belonging to the field of chemical technology. The co-production method provided by this application includes: feeding crude methanol into a light-duty removal distillation column for pre-distillation treatment to obtain a pre-distillation column bottom component; dividing the pre-distillation column bottom component into two streams, one as the output of MTO methanol and the other as a reprocessed component of the pre-distillation column bottom; feeding the reprocessed component of the pre-distillation column bottom into a refined methanol distillation column for distillation treatment to obtain a distillation column top component and a distillation column bottom component; at least a portion of the distillation column top component is output as refined methanol, and the distillation column bottom component is returned to the light-duty removal distillation column. This application achieves the co-production of refined methanol using only two columns, eliminating the need for additional independent equipment, significantly reducing equipment investment costs, and enabling flexible adjustment of both MTO methanol and refined methanol products, thus possessing broad application prospects in the industrial-grade MTO methanol field.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

This invention discloses a process for preparing solid sodium silicate based on controllable particle size water quenching, belonging to the field of inorganic silicate chemical technology. The specific steps are as follows: S1: raw material melting and homogenization; S2: controllable particle size water quenching; S3: solid-liquid separation and online classification; S4: deep drying and packaging. This invention achieves innovation and simplification of the production process: through a one-step "atomization-cooling" forming method, the high-energy-consuming crushing and screening processes in traditional processes are completely eliminated, shortening the process flow and reducing equipment investment and maintenance costs; it significantly improves the overall quality of the product: directly generating solid particles with high sphericity and smooth surface, the product has good flowability, stable bulk density, high whiteness, and no tendency to agglomerate during subsequent dissolution, with a faster dissolution rate and superior application performance.

The utility model discloses a kind of high-efficiency cooling fermentation tanks, relate to chemical technology field.Cooling water is better contacted with the whole outer wall of tank body by spiral channel, with the flow of cooling water along spiral channel, its coldness gradually loses, by the pitch variation of spiral channel, the flowability of cooling water gradually strengthens, the cooling effect of lower part of tank body is strengthened, so as to make up the coldness loss of cooling water, so that the cooling effect of upper and lower part of tank body is more balanced.The setting of constant pressure pipe prevents unnecessary pressure mutation when adjusting water pressure of water inlet end, and the suddenly increased water pressure of water inlet end is discharged to water outlet end, so as to balance the pressure of water inlet and outlet, further strengthen the stability of cooling work, and ensure the cooling efficiency.

The application discloses a kind of based on machine learning prediction amide bond molecular synthesis conversion rate method, belong to chemical technical field.The application is based on high-throughput experiment collection reaction conversion rate data, establishes data set, and utilizes quantum chemistry calculation means to extract the feature descriptor of reaction related molecule, and the model after training finds that random forest model only needs a small amount of data to reach good prediction accuracy.Through the prediction of unknown aromatic amine molecular conversion rate in amidation reaction, it is found that a small amount of relevant reaction data can be added in the training set of random forest model to significantly improve the prediction performance of unfamiliar data.This has important guiding significance for exploring the synthesis of amide bond and the future application of machine learning to the field of chemical synthesis.

The utility model relates to the technical field of petrochemical engineering, in particular to a p-diethylbenzene recovery system which comprises a p-diethylbenzene collecting tank, an air cooler, a p-diethylbenzene tank area, a steam heat exchanger, a carclazyte tower and a circulating pipeline, an outlet header pipe of the p-diethylbenzene collecting tank is connected to a p-diethylbenzene tank area through a first branch pipeline, the air cooler is arranged on the first branch pipeline, and the p-diethylbenzene tank area is sequentially connected with a steam heat exchanger and a carclazyte tower through a tank area outlet pipeline. An outlet of the carclazyte tower is connected to a p-diethylbenzene system through a p-diethylbenzene external supplement pipeline, an outlet sampler is arranged on the p-diethylbenzene external supplement pipeline, and the p-diethylbenzene external supplement pipeline is connected to an inlet of a p-diethylbenzene collecting tank through a circulating pipeline. According to the utility model, the outlet sampler is arranged at the outlet of the carclazyte tower, the treated diethylbenzene is sampled and detected, the diethylbenzene is circularly treated through the circulating pipeline, and after the diethylbenzene is monitored to be qualified, the diethylbenzene is merged into the system, so that the system is prevented from being polluted.

The invention belongs to the technical field of pharmaceutical chemicals, and particularly relates to a method for preparing guanidinoacetic acid from glycine mother liquor. Based on a glycine-cyanamide method, a glycine solution containing iminodiacetic acid is used as one of reaction raw materials. When the method is used for preparing the guanidinoacetic acid, the glycine mother liquor can be directly used for preparing the guanidinoacetic acid, so that the mother liquor is directly treated, the separation step of the glycine mother liquor is omitted, and the process is simplified. Moreover, the method has an unexpected technical effect on the improvement of the yield of the guanidinoacetic acid, and the yield of the guanidinoacetic acid is improved by 6.2-6.4% compared with the prior art.

The invention discloses a method for comprehensively recycling yellow phosphorus slag of an electric furnace, and belongs to the technical field of chemical engineering. Comprising the following steps: grinding slag, adding nitric acid in proportion, reacting dicalcium silicate in the slag with nitric acid to generate calcium nitrate and silicon slag, and reacting calcium nitrate with ammonium carbonate to prepare an ammonium nitrate product and a calcium carbonate product; and washing and separating the silicon slag to obtain orthosilicic acid, returning one part of orthosilicic acid to be re-blended with the phosphate ore to enter the furnace so as to recycle the slag, and calcining the rest part of orthosilicic acid to obtain a white carbon black product. The use amount of silica is reduced, mineral resources of silica are saved, and the use amount of silica produced from yellow phosphorus reaches self-balance.

This invention relates to the field of titanium chemical technology and discloses a refining process for crude titanium tetrachloride, comprising: feeding crude titanium tetrachloride and a vanadium removal agent into the bottom of a distillation column, mixing them in the bottom, and completing the vanadium removal reaction; the material in the bottom is extracted by a refining circulation pump and heated, then returned to the upper middle part of the bottom for in-situ flash evaporation, and the flash-evaporated liquid phase falls back to the bottom of the bottom; the titanium tetrachloride vapor generated by flash evaporation enters the purification section at the top of the distillation column for distillation separation, and the refined titanium tetrachloride gas generated at the top is condensed and enters a reflux tank, part of which is returned to the top of the distillation column to control the distillation purity, and the other part is output as qualified refined titanium tetrachloride product. This invention also provides a system for implementing this process. This invention solves the technical problem that traditional processes require multiple separate devices such as a circulation pump tank and a flash evaporation tank, making production operation and condition control difficult.

The application relates to the chemical technology field and discloses a metallocene compound, a preparation method and a metallocene catalyst and application thereof. The metallocene compound provided by the application comprises a fluorenyl ligand, a metallocene ligand, a bridging structure and a metal part in a chemical structure. By introducing an adsorption group with a micropore effect into the fluorenyl ligand, the metallocene compound can exhibit strong saturated adsorption capacity when interacting with cocatalysts such as organic boron and organic aluminum, the cocatalyst concentration around the metal center can be improved, the activity and thermal stability of the catalyst can be significantly enhanced, the metallocene compound can catalyze alpha-olefin polymerization with high activity, the amount of the cocatalyst is reduced, and the production cost of polyolefin is reduced.

This invention belongs to the field of oilfield chemical technology and discloses a surface-modified ultrafine graphite-based drilling fluid extreme pressure lubricant and its preparation method. The extreme pressure lubricant comprises a base oil, a long-chain fatty acid ester oiliness agent, a liquid extreme pressure agent, a surface-modified solid extreme pressure agent, a rheology modifier, and an emulsifier. The surface-modified solid extreme pressure agent is prepared by using ultrafine graphite powder as a matrix, undergoing a first modification with sulfurized oleic acid polyethylene glycol ester, and a second modification with an oil-soluble dispersant. This invention utilizes the non-degradable nature of modified graphite at high temperatures, combined with a liquid extreme pressure agent, to form a high-strength composite reactive film at the high-temperature friction interface through a carbon-sulfur-boron synergistic effect. Under the triple synergistic lubrication mechanism of the oil film, the chemically reactive extreme pressure film, and the solid lubricating film, the technical problem of easy demulsification and lubrication failure of traditional lubricants in environments with 200℃ high temperature and 36% saturated salt water is effectively solved.

The utility model relates to the technical field of chemical engineering, in particular to an energy-saving continuous distillation device which comprises a distillation box, a first supporting plate, a second supporting plate and a heat preservation cover are fixedly installed on the distillation box, a first filter box is installed on the first supporting plate, and a first pipeline matched with the distillation box and the heat preservation cover and used for conveying waste gas is arranged on the first filter box. A filter box II is mounted on the support plate II, and a pipeline II which is matched with the distillation box and is used for conveying the wastewater is arranged on the filter box II. The first filter box is arranged on the distillation box, impurities in waste gas are intercepted through the filter element, the intercepting cylinder, the filter cylinder, the filter cotton and the activated carbon layer in the first filter box, the waste gas is conveyed into the heat preservation cover after being filtered, and the heat preservation cover can conduct continuous heat preservation on the distillation box; the second filter box is arranged on the distillation box, the wastewater and the flocculating agent are stirred through the net blades in the second filter box, the wastewater can be filtered again through sand gravels, and then the surrounding environment is protected.

The present application relates to a kind of enzyme prediction method and device, and a kind of computer readable storage medium.The prediction method includes the following steps: obtaining the molecular information of target product;According to the molecular information, and the performance expectation of enzyme catalytic reaction to generate the target product, determine the performance descriptor of target enzyme for generating the target product;According to the performance descriptor, mathematical fitting is carried out to determine the matrix descriptor of the target enzyme;According to the matrix descriptor, determine the multiple amino acid residue descriptor involved in the target enzyme;And according to the multiple amino acid residue descriptor, determine the amino acid sequence of the target enzyme.Through executing these steps, the prediction method can efficiently and reliably select catalytic enzyme, to facilitate the efficient production of target product, and reduce the output and discharge of side reaction, to promote the further development of enzyme catalysis technology as a kind of green chemical technology.

This invention belongs to the field of pharmaceutical chemistry, specifically relating to a method for preparing an organic compound. Addressing the technological gap in existing technologies that only disclose the compound structure but lack effective preparation methods, making it difficult to obtain the compound, this invention, through an independently developed synthetic route, achieves for the first time the efficient and stable preparation of this compound, successfully obtaining a high-purity target compound and solving the technical problem of "having the structure but no product." The method of this invention is simple, uses mild conditions, and utilizes readily available raw materials. The process is stable and highly reproducible, suitable for industrial production, and provides a reliable source of material for subsequent research and application of this compound.

The present application relates to the chemical technology field, specifically to a kind of low melting point wax and preparation method thereof.The preparation method of the low melting point wax described in the present application, characterized in that, the method comprises the following steps: raw oil is mixed with first solvent, heated and dissolved, to obtain first solution;The first solution is cooled, crystallized, first residence, to obtain first crystallization liquid;The first crystallization liquid is cooled, crystallized, second residence, to obtain second crystallization liquid;The second crystallization liquid is first solid-liquid separation, to obtain dewaxed oil and wax cream;The wax cream is mixed with second solvent, and then deoiled, second solid-liquid separation, to obtain deoiled wax cream;The deoiled wax cream is removed solvent, to obtain finished wax;Raw oil is fischer-tropsch oil at 280 DEG C-450 DEG C fraction;Solvent is selected from ester solvent.Using this method, the yield of product wax is improved, the oil content in product wax is reduced, and the melting point range of product wax can be flexibly controlled.

The utility model relates to the technical field of chemical engineering, and provides a novel glass fiber reinforced plastic tower with a stable structure, which comprises a glass fiber reinforced plastic tower body and a base, a supporting plate is arranged at the top end of the base, two first sliding grooves are formed in the supporting plate, first sliding blocks are arranged in the first sliding grooves, clamping claws are arranged on the first sliding blocks, and first limiting plates are arranged on the first sliding blocks. A first limiting plate is arranged on the supporting plate, an adjusting block is arranged on the first limiting plate, two fixing plates are arranged on the supporting plate, a double-shaft motor is arranged on the supporting plate, the two output ends of the double-shaft motor are both connected with first screws, the first screws are in threaded connection with the adjusting block, and the auxiliary fixing mechanism is connected with the supporting plate. The clamping jaw is driven to accurately clamp the tower body, the clamping force is uniform, shaking and displacement during installation are prevented, meanwhile, the rotary knob can be rotated to drive the rotating rod and the second screw rod, the tension degree of the steel wire rope is finely adjusted, the tower can be kept stable under different working conditions, and the operation stability of equipment is greatly improved.

The utility model relates to the technical field of petrochemical engineering, and discloses a C4 integrated device which comprises a countercurrent multistage reactor, a reduced pressure rectifying tower and an azeotropic rectifying tower which are arranged on the same straight line, a mixed C4 feeding hole and a catalyst feeding hole are formed in one side of the countercurrent multi-stage reactor, the bottom end of the countercurrent multi-stage reactor is connected with a reactor discharging pipe, and one end, far away from the reduced pressure rectifying tower, of the reactor discharging pipe is connected with a feeding hole of the reduced pressure rectifying tower; through the pressure transmitter, the component analysis probe and the temperature sensor, the temperature, pressure and component change in the azeotropic rectifying tower can be monitored in real time, so that the temperature gradient in the azeotropic rectifying tower can be adjusted by controlling the flow of cooling liquid and the flow of steam, the probability of C4 azeotrope interference is reduced, and temperature capture can be carried out on key positions such as a rectifying section and a stripping section.

The present application relates to the oil field chemical technology field, it is a kind of preparation method and application of amino sulfonic acid betaine type surfactant containing polyoxyethylene ether chain segment, the amino sulfonic acid betaine type surfactant containing polyoxyethylene ether chain segment raw material includes by mass fraction.The amino sulfonic acid betaine type surfactant containing polyoxyethylene ether chain segment of the present application is green environmental protection, biodegradable, preparation operation is simple, and flammable, explosive, volatile organic solvent is not used in process, safe and reliable;It is beneficial to industrial production and popularization and application, and has broad market prospect.The acidizing fracturing cleanup aid with it as raw material can effectively reduce the oil and gas field fracturing fluid surface, interfacial tension, while the amount of surfactant in cleanup aid is lower, and the use cost is saved.

The invention relates to the technical field of oilfield chemistry, in particular to a sulfamic acid type surfactant as well as a preparation method and application thereof.The sulfamic acid type surfactant is prepared according to the following steps: step one, after fatty amine and a first solvent are mixed, adding a 3-chloro-2-hydroxypropyl sodium sulfonate aqueous solution, and stirring to obtain a first mixture; reacting to obtain 3-(long-chain alkylamino)-2-hydroxypropane-1-sodium sulfonate; and 2, dissolving a required amount of 3-(long-chain alkylamino)-2-hydroxypropane-1-sodium sulfonate in a second solvent, adding a required amount of methyl acrylate, and reacting to obtain the sulfamic acid type surfactant. The sulfamic acid type surfactant disclosed by the invention contains long-chain alkyl, amino, ester group, hydroxyl and sulfonic acid group, so that the sulfamic acid type surfactant has good surface activity and meets the development requirements of oil and gas fields, and the microemulsion cleanup additive prepared by utilizing the sulfamic acid type surfactant has excellent water solubility and surface activity and meets the industrial use standards of non-fluorocarbon cleanup additives.

The invention discloses a processing system and method for discharging alkali liquor from sodium carbonate, and belongs to the technical field of chemical engineering, the processing system for discharging alkali liquor from sodium carbonate comprises a distributing device and a conveying mechanism which are sequentially connected, and a washing water circulating system, a belt filter and a medium wave infrared device are sequentially arranged in the direction of conveying alkali liquor from sodium carbonate by the conveying mechanism; the washing water circulation system comprises a first-section washing water mechanism, a second-section washing water mechanism and a third-section washing water mechanism which are sequentially arranged, then third-section washing water treatment, belt filter treatment and medium-wave infrared treatment are sequentially carried out on the soda outlet liquor, the third-section washing water is additionally arranged through gradient heat exchange utilization of desalted water, and a third-section washing water circulation system is constructed. According to the present invention, with the combination of the filter aid compounding and the medium-wave infrared radiation reinforced dehydration, the filtration condition is optimized from the source, such that the purposes of filter cake moisture reducing, filtration pressure difference reducing, equipment scaling relieving and washing efficiency improving are achieved so as to reduce the calcination energy consumption, improve the product purity, prolong the equipment operation period and reduce the maintenance cost;

This invention relates to a method for the graded utilization of wet-process phosphoric acid and the co-production of food-grade phosphoric acid and ammonium phosphate, belonging to the field of phosphoric acid chemical technology. The method first purifies the raw phosphoric acid, with the main process involving multi-stage extraction and back-extraction to obtain food-grade phosphoric acid. For the byproduct raffinate acid, no complex purification is required; instead, a slurry process is used directly to prepare fertilizer. When producing diammonium phosphate, the final neutralization pH is controlled at 8.0-8.5, and the degree of ammoniation is 1.8-2.0. When producing monoammonium phosphate, the raffinate acid is mixed with slag acid and filter solids, and a small amount of raw material acid is added to neutralize to a pH of 4.0-4.5, with a degree of ammoniation of 1.0-1.1. This invention overcomes the problems of high slurry viscosity, equipment blockage, and low product grade caused by the direct fertilizer production of raffinate acid with a simplified process. Furthermore, it coordinates with the disposal of system waste in monoammonium phosphate production, truly achieving high-value utilization and clean production of all components of wet-process phosphoric acid.

This application discloses a high-throughput computational method, apparatus, device, and storage medium for grafted polymers based on molecular dynamics simulation, belonging to the field of computational chemistry technology, and capable of solving the problem of the inability to quickly perform simulation calculations of grafted polymers. The method includes: receiving first parameters of at least one grafted polymer to be simulated; generating a corresponding initial model based on the first parameters, wherein the first parameters include at least the main chain length, side chain length, and grafting density; performing molecular dynamics simulation on the initial model according to pre-configured molecular dynamics parameters to obtain the evolution trajectory of the grafted polymer; determining second parameters of the grafted polymer based on the evolution trajectory, wherein the second parameters include at least the mean square radius of gyration and the mean square end-to-end distance of the main chain; and generating corresponding analysis results based on the first and second parameters, wherein the analysis results include at least the parameter combination corresponding to the grafted polymer and a scatter plot corresponding to the parameter combination.

The invention discloses a tail gas desulfurization coupling carbon capture system and process, and belongs to the technical field of chemical engineering. The invention discloses a tail gas desulfurization coupling carbon capture system which comprises an online combustion furnace, a hydrogenation reactor, a cooling mechanism, a tail gas absorption tower, a tail gas regeneration tower, a carbon capture absorption tower and a carbon capture regeneration tower which are sequentially connected, and the online combustion furnace is connected with a Claus tail gas conveying pipe, a fuel gas conveying pipe and an air conveying pipe; the tail gas absorption tower is connected with a tail gas output pipe; the carbon capture absorption tower is connected with a CO2 gas output pipe; and the carbon capture regeneration tower is connected with an H2S-rich acid gas output pipe. The invention discloses a tail gas desulfurization coupling carbon capture process adopting the system. According to the invention, the Claus sulfur recovery tail gas can be subjected to desulfurization and carbon capture, the amount of tail gas entering the carbon capture unit is greatly reduced, one-time investment and operation energy consumption are saved, and the tail gas can be discharged up to the standard.

The invention relates to the chemical technology related to mineral salts and can be used in the chemical industry. A process for the production of ammonium bromide from a bromine-containing polycomponent aqueous mineral raw material, comprising: two-stage oxidation of bromine ions during acidification of the brine using gaseous chlorine; air desorption of the primary bromine; absorption of the same using a cooled solution of ammonium bromide; and reduction using an ammonia solution. The resulting concentrated solution of ammonium bromide is evaporated until crystals are formed. The ammonium bromide crystals are dried, and the mother liquor is used to produce a solution of ammonium bromide as a commercial product.