30 results about "Chloramine" patented technology

The invention relates to the field of fine chemical engineering, and discloses a green process for preparing chloramine T by a continuous flow reactor. The method comprises the following steps: respectively pumping p-toluenesulfonamide, a sodium hydroxide solution and a sodium hypochlorite solution into a micro-channel mixer for instantaneous mixing, and carrying out chlorination reaction in a multi-stage temperature control tubular reaction unit; the concentration of free chlorine is detected on line at an outlet, and the flow rate of a chlorine source is dynamically adjusted through a PID algorithm, so that closed-loop control is realized; the reaction liquid is directly crystallized and separated to obtain the product without alkali wash. The system comprises a base solution and chlorine source conveying subsystem, a micro-channel mixer, a multi-stage reaction unit, an online monitoring module, a central controller and a crystallization unit. The side reaction is inhibited from the source, so that the free chlorine is less than or equal to 0.5 mg / L, the alkali washing step is omitted, the COD (Chemical Oxygen Demand) of the wastewater is reduced by more than 80%, the product purity is more than or equal to 99.5%, and the productivity is improved by 3 times.

This invention relates to a carbonaceous material activated to form precursor activated carbon, said carbonaceous material being further enhanced by doping with copper, iron, and nitrogen and calcining. The carbonaceous material includes those obtained from coal, wood, or coconut shells. The invention describes a method for doping said activated carbon. This treatment method produces an adsorbent material that exhibits excellent performance in removing chloramines and similar compounds from fluids such as drinking water.

The present application relates to the technical field of water treatment, and particularly relates to a method for degrading a triazole nucleoside antiviral drug in water. The method comprises the following steps: adding a chloramine disinfectant to a water sample to be treated, and then placing the water sample in an ultraviolet light irradiation environment to perform a photo-induced oxidation reaction, wherein the wavelength of the ultraviolet light is 200-300 nm, the irradiation intensity is 0.079-0.25 mW / cm 2 , the temperature is 10-30 DEG C, and the time is 90-150 min, so as to destroy the chemical structure of the drug and degrade the triazole nucleoside antiviral drug. The method utilizes the synergy of ultraviolet and chloramine combined disinfection to economically and efficiently remove the triazole nucleoside antiviral drug in water, without the need to add additional equipment and reagents, and the operation is simple.

This invention provides an oxidizing bactericide, its preparation method, and its application. The oxidizing bactericide comprises 30-60 parts of a modified chloramine compound, 5-15 parts of a modified chelating agent, 3-10 parts of a delay agent, 2-8 parts of a synergist, 1-5 parts of a corrosion inhibitor, and water to a total weight of 100 parts. The oxidizing bactericide of this invention exhibits stronger bactericidal effects, higher stability, and a longer shelf life. It also overcomes the drawback of traditional bactericides that easily corrode reusable membranes, significantly reducing the operation, maintenance, and consumable costs of water treatment systems, and possesses promising prospects for industrial application.

The invention discloses a < 131 > I labeled SNO hydrogel material and a preparation method of the < 131 > I labeled SNO hydrogel material. The hydrogel material is mainly composed of hyaluronic acid, firstly, one kind of hyaluronic acid is modified, API molecules are modified on the side chain of the hyaluronic acid, a reaction site is provided for marking of < 131 > I nuclide, meanwhile, the hyaluronic acid is subjected to oxidation treatment, the hyaluronic acid rich in aldehyde groups becomes a monomer for forming the hydrogel, the hyaluronic acid with another molecular weight is selected, and the molecular weight of the hyaluronic acid is changed into the molecular weight of the hydrogel. ADH rich in hydrazide groups is introduced into a side chain through amidation reaction, a hydrazone bond is formed through reaction of aldehyde groups and hydrazide, and the chemical bond can endow the hydrogel with injectable and self-healing characteristics. Nuclide labeling of the hydrogel is completed for the first time through a chloramine T method, the overall labeling rate reaches about 80%, the hydrogel has good stability under physiological conditions, < 131 > I is not prone to falling off from the hydrogel, and the hydrogel has a good antibacterial effect at 500 mu ci. By constructing a bacterial infection osteoarthritis model, it is verified that the < 131 > I-labeled HA hydrogel has good injectability, the in-situ enrichment capacity of iodine < 131 > I is improved, and therefore the antibacterial efficiency is improved, the method is simple in preparation, the < 131 > I labeling efficiency is high, the method can be widely applied to osteoarthritis caused by bacterial infection, and the application prospect is wide. And a wide prospect is provided for clinical treatment of the disease.

The invention belongs to the technical field of sewage treatment, and discloses a method for realizing shortcut nitrification. The method comprises the following steps: inoculating the whole-process nitrification floc sludge into a short-cut nitrification reactor; feeding the sewage into a short-cut nitrification reactor, so that the activity of the whole-cut nitrification floc sludge in the short-cut nitrification reactor is recovered; after the sludge activity is recovered, the short-cut nitrification reactor operates in a sequencing batch mode; in the aerobic stage of operation of the short-cut nitrification reactor, an organic chloramine compound aqueous solution is added into the short-cut nitrification reactor while aeration is started, and when NAR in a water body in the short-cut nitrification reactor is larger than or equal to 90%, short-cut nitrification is achieved, and adding of the organic chloramine compound aqueous solution into the short-cut nitrification reactor is stopped. According to the invention, short-cut nitrification of urban sewage can be rapidly realized, and meanwhile, organic chloramine compounds are intermittently added, so that a long-term stable short-cut nitrification process is realized.

The invention relates to a full-flow treatment process method for algae-laden water, which belongs to the technical field of sewage treatment and comprises the following steps: chloramine disinfection and pre-oxidation, humus treatment with magnetic resin, pH value adjustment with carbon dioxide for enhanced coagulation, flocculant coagulation, ferroferric oxide recovery with a magnetic separation device, filtration and disinfection. The chloramine and the magnetic resin cooperate with each other, so that the probability of algae cell rupture can be reduced, the adsorption efficiency of the magnetic resin is improved, the coagulation environment is optimized, chloramine is firstly used for disinfection and pre-oxidation and then the magnetic resin is used for treating humus during high algae-laden water sewage treatment, and the sequence of the method is very key. Chloramine is adopted for disinfection and pre-oxidation before magnetic resin adsorption, so that the probability of algae cell rupture is reduced, the magnetic resin adsorption efficiency is improved, blockage can be prevented, and the flow rate is increased.

Methods of making catalytically active metal-triazine treated carbon particles, and the resultant catalytically activated metal-triazine sorbent carbon media. The particles are formed by soaking an activated carbonaceous product in an oxidizing acid solution and exposing the oxidized activated carbon to at least one metal-triazine complex in solution for a time sufficient to form metal-triazine impregnated carbon particles. The impregnated carbon particles are heated in a non-oxidizing atmosphere to render calcined metal-triazine impregnated carbon particles, which are cooled to form catalytically active metal-triazine treated carbon particles that remove chloramines from aqueous solution. The resultant catalytically activated metal-triazine treated carbon particles are formed into filter media and / or blocks for removing at least chloramines from aqueous solution.

The utility model relates to a drying device for green synthesis of chloramine, which belongs to the technical field of drying equipment and comprises a drying tank, a discharge pipe, a heating jacket, a stirring shaft, a stirring motor, a stirrer, a pressure gauge, an exhaust pipe and a temperature sensor. A cooling liquid pipe communicated with the condensing coil is wound on the condensing coil, the other end of the condensing coil is fixedly connected with a liquid collecting tank, the top of the liquid collecting tank is connected with a suction pipe, and the suction pipe is connected with a vacuum pump. Before chloro-amine is dried, nitrogen is firstly introduced to exhaust air for protection, so that reduction of product purity caused by side reaction during drying can be prevented, low-temperature drying is realized by vacuum suction, and energy consumption is reduced; the condensing coil performs cooling treatment and liquid recovery on hot air, water vapor is collected, the service life of the vacuum pump is prevented from being affected by the water vapor, cooling nitrogen is introduced after drying is completed, and product cooling can be accelerated while nitrogen sealing is achieved.

This invention discloses a eutectic solvent and its preparation, a metal leaching agent, and a metal leaching method. The eutectic solvent is prepared by mixing choline chloride and a sulfonamide compound in a specific ratio; the sulfonamide compound is sulfonamide, 4-amino-N-(aminoiminomethyl)benzenesulfonic acid, or p-aminobenzenesulfonamide. This invention provides a metal leaching agent containing the aforementioned eutectic solvent, which is a transparent liquid prepared from the eutectic solvent and an auxiliary agent. The auxiliary agent is at least one selected from 1,3-dibromo-5,5-dimethylhydantoin, 1,3-dichloro-5,5-dimethylhydantoin, N-chlorosuccinimide, N-bromosuccinimide, chloramine T, and sodium hypochlorite. The eutectic solvent of this invention is an environmentally friendly compound, and the metal leaching agent system containing this eutectic solvent possesses both good oxidizing and coordinating abilities, enabling the leaching of gold and palladium with rapid leaching speed and high extraction rate.

Sorbent materials are described that have enhanced performance in removing chlorine and chloramine, among other toxic compounds. The sorbent materials are formed by a process which includes steps of oxidation, adding a nitrogen-containing compound, and calcining the sorbent. The processes of forming the sorbent materials are also disclosed. The sorbent materials have excellent performance as measured by a chloramine and / or chlorine destruction number, and the sorbents retain a high nitrogen edge concentration. The sorbent materials may also be incorporated into devices such as filter assemblies.

The invention provides a method for measuring iodine in a regional geochemical survey sample, and belongs to the technical field of measuring methods. The iodine content in the sample is determined by adopting a spectrophotometric method. The method comprises the following steps: mixing a sample with an Eschka mixed solvent, heating and melting through a program, extracting in a water bath, and fixing the volume; taking supernate, sequentially adding sodium carbonate, acetic acid, tetraalkali and chloramine T solution for color development, and measuring the absorbance in a cuvette with the wavelength of 600nm and the length of 1cm or 3cm. Drawing a standard curve through an iodine standard solution, and calculating the iodine content of the sample according to the absorbance after the blank is deducted. The method is low in detection limit, high in accuracy and good in precision. The method is easy to operate, low in cost, superior to the existing national standard in efficiency, suitable for analysis and test of large-batch geochemical sample iodine and wide in application prospect.

The application discloses a method for improving the anti-biofouling performance of an anion exchange membrane by modifying Co NPs and chloramine, and the method is used for improving the anti-biofouling performance of the anion exchange membrane by modifying Co NPs and chloramine. A chargeable anion exchange membrane with anti-biofouling performance is prepared, and the anion exchange membrane has good anti-biofilm performance, antibacterial performance, separation performance and chargeability in the antibacterial process.

Apparatus and method for the determination of the presence or quantity of monochloramine and / or ammonia in a liquid sample, utilising an electrochemical sensor 10 comprising working 11, reference 12 a

The invention belongs to the technical field of water treatment, and discloses a water treatment composition and application. A water treatment composition includes modified graphite phase carbon nitride having high crystallinity and low defect density, and monochloramine. According to the method, the conventional thought of purely pursuing high specific surface area is abandoned, and the modified graphite phase carbon nitride with high crystallinity and low defect density is prepared by creatively controlling the low flow rate of inert gas in the pyrolysis process. The highly ordered crystal structure and the pure chemical skeleton bring a breakthrough in intrinsic photoelectric properties, and experiments prove that the contribution of the improvement of the crystallinity to the properties is far greater than the improvement of the pure specific surface area. Due to the structural stability brought by high crystallinity, the modified graphite phase carbon nitride can keep high catalytic activity in recycling. Meanwhile, the water treatment composition shows efficient degradation capacity on various types of typical organic pollutants, shows good broad-spectrum applicability, and has a wide practical application prospect.

The invention discloses a preparation method and application of unsymmetrical dimethylhydrazine, and relates to the technical field of chemical synthesis.The preparation method comprises the steps that firstly, ammonia water and a sodium hypochlorite solution are mixed, an ammonium chloride buffer solution is added, the reaction temperature is kept stable through a cooling device, stirring is continuously conducted for 15-25 min, and a chloramine solution is obtained; then mixing and stirring the chloramine solution and the dimethylamine aqueous solution, accurately controlling the flow through a metering pump to ensure that the proportioning ratio is accurate, and continuously reacting for 1-5 hours to obtain an unsymmetrical dimethylhydrazine crude product; and finally, putting the unsymmetrical dimethylhydrazine crude product into a rectifying tower for rectifying and purifying to obtain a final product unsymmetrical dimethylhydrazine. According to the preparation method and application of unsymmetrical dimethylhydrazine, by accurately controlling the conditions of the first-step reaction and the second-step reaction in the unsymmetrical dimethylhydrazine synthesis reaction, such as the temperature, the proportion and the retention time, the content of unsymmetrical dimethylhydrazine is effectively increased, and the generation of by-products is reduced.

The application discloses an aluminum fiber sound absorption board and belongs to the technical field of sound absorption boards. The sound absorption board comprises the following raw materials in parts by weight: 45-50 parts of polyether polyol, 40-45 parts of isocyanate, 15-20 parts of aluminum powder, 12-18 parts of chopped glass fiber, 12-16 parts of flame retardant, 0.5-0.8 parts of coupling agent, 2-4 parts of antibacterial additive, 3-5 parts of foaming agent, 0.8-1.2 parts of foam stabilizer, 0.5-0.7 parts of catalyst and 0.2-0.3 parts of dispersing agent. The antibacterial additive is prepared by composite modification of chloramine, pyridine quaternary ammonium salt and chitosan, and has a triple synergistic antibacterial mechanism. The aluminum powder and the glass fiber are used to construct a stable porous structure, so that the sound absorption performance and the mechanical strength are improved; the antibacterial component is combined with the material body through a covalent bond and does not precipitate for a long time. The sound absorption board has excellent sound absorption, antibacterial and mechanical properties and is suitable for places with high requirements for health and sound quality, such as hospitals and clean workshops.

The present application relates to the technical field of water treatment, and particularly relates to a water plant automatic chlorination process optimization method, device and storage medium. The method reads free chlorine content, monochloramine content and free ammonia content from clarified water flow data and filtered water flow data; automatically adjusts the amount of pre-chlorination according to pre-chlorination flow addition ratio, free chlorine target value and free chlorine content; calculates and automatically adjusts the current post-chlorination amount according to post-chlorination flow addition ratio, monochloramine target value and monochloramine content; calculates and automatically adjusts the current post-ammonia amount according to post-ammonia flow addition ratio, free ammonia target value and free ammonia content, until the free chlorine content, monochloramine content and monochloramine content all meet the requirements of the factory. Compared with the prior art, the present application has the advantages of automatically controlling the entire disinfection process chlorination and ammonia addition amount according to the monochloramine, free ammonia target value and dosing point water flow of the factory water, improving the disinfection quality of the factory water and the like.

The application discloses a method for preparing caprolactam by taking lysine-containing fermentation liquor, lysine or lysine salt as raw materials, and belongs to the technical field of caprolactam synthesis. The application solves the problems of low yield, complex and harsh operation conditions, high preparation cost and inability to be applied in large-scale industrialization in the prior art. The application takes lysine-containing fermentation liquor, lysine or lysine salt as starting raw materials, synthesizes aminocaprolactam under high temperature and high pressure with or without sodium hydroxide, then uses chloramine as a deaminating reagent to react with the amino group of aminocaprolactam, so that the amino group is converted into a hydrazine, the hydrazine is oxidized into an azo compound by chloramine, and then caprolactam is obtained by denitrogenation under alkaline conditions. The preparation method has the advantages of high product yield, short reaction path, high reaction efficiency, simple operation, low production cost and the like, and is suitable for large-scale production of caprolactam.

A system for removing chloramine compounds from swimming pool water using a visible light-responsive photocatalyst, comprising: a) a photocatalytic reactor unit configured to contain a carbon nitride-based photocatalyst capable of degrading mono-, di- and trichloramine compounds upon irradiation with visible light; b) a water circulation unit integrated into the photocatalytic reactor unit, configured to circulate swimming pool water through the photocatalytic reactor unit; c) a visible light irradiation unit configured to provide visible light irradiation to activate the carbon nitride-based photocatalyst; and d) a by-product separation unit configured to separate degraded chloramine by-products from the treated water.

The utility model belongs to the field of swimming pool dehumidification, and particularly relates to a condensate water recycling structure of a swimming pool dehumidification heat pump, which comprises a collecting box, the top end of the collecting box is fixedly connected with a leading-in pipe, and one end, far away from the collecting box, of the leading-in pipe is fixedly connected with a condensing pipe; and the stirring assembly is arranged in the collecting box, and the stirring assembly comprises a motor fixedly installed at the top end of the collecting box. The filtering assembly is arranged on the right side of the bottom of the collecting box; according to the utility model, the stirring rod stirs in the collecting box, so that various impurities in condensate water in the collecting box cannot be accumulated, and the impurities in the condensate water can be discharged conveniently; the filter plate can intercept impurities in the flowing condensate water, so that the impurities are accumulated in the collecting plate, and in addition, soluble pollutants such as grease and chloramine in the condensate water are adsorbed through the activated carbon filter bag, so that the discharged condensate water is purer.

This invention provides a method for producing hydrazine that uses simple equipment, offers high safety, and enables the production of low-moisture hydrazine in high yield without the need for a moisture removal process. [Solution] The method for producing hydrazine according to the present invention comprises: a first step of supplying a first ammonia gas and a chlorine gas; a second step of mixing the first ammonia gas and the chlorine gas to obtain a mixed gas; a third step of reacting the first ammonia gas and the chlorine gas in the mixed gas to produce chloramine gas; a fourth step of supplying the chloramine gas and the second ammonia gas to an alcohol-based solvent and dissolving them to obtain a solution; and a fifth step of heating the solution to react the ammonia and chloramine in the solution to synthesize hydrazine.

The utility model belongs to soil detection technical field especially for soil cyanide determination device based on gas chromatography, including including preprocessing unit, gas chromatography detection unit and automation control unit, preprocessing unit includes ultrasonic extraction module, automatic distillation module and derivatization module, gas chromatography detection unit includes headspace sampler, chromatographic column and detector, automation control unit includes microprocessor and data processing module, still include the derivatization device for derivatization module in preprocessing unit, the utility model, adopt ultrasonic extraction and automatic distillation combination, shorten the pretreatment time, shake the reactor ware in the derivatization process simultaneously, make the reactant fast mixing reaction, promote the reaction speed and efficiency, and the detection sensitivity is promoted to chloramine T derivatization technology, and the sample processing is from data output and all is by microprocessor control, reduces the human error, promotes the accuracy of detection, and the speed is fast, the efficiency is high, and the convenient use.

This invention discloses a method for dissolving dual-labeled nitrogen gas in water ( 15 The preparation and quantification method of N2 standard samples belongs to the field of stable isotope analysis technology. This method will... 15 N-labeled ammonium chloride solution reacts with sodium hypochlorite in a completely sealed reaction flask filled with liquid and without a headspace, resulting in in-situ formation and dissolution. 15 N 15 Nitrogen gas was directly measured in its dissolved state in the liquid phase using membrane sample mass spectrometry (MIMS). 15 N 15 The m / z 30 characteristic signal of N was obtained by simultaneously monitoring the concentrations of residual monochloramine, dichloramine, and trichloramine in the reaction solution, and corrected based on the principle of nitrogen conservation. 15 N 15 The true concentration of nitrogen (N). This invention eliminates the need for gas collection, transfer, and cold trap purification throughout the entire process, avoiding nitrogen escape losses; chloramine correction significantly improves quantitative accuracy. It is simple to operate and allows for the flexible preparation of a series of concentration standards ranging from 10 to 1000 μmol / L. The signal drift of the standards is less than 3% within 30 days, making it suitable for isotope ratio mass spectrometry calibration, denitrification tracing, and isotope analysis of dissolved nitrogen in environmental water samples.