55 results about "Chloramine" patented technology

The invention relates to the technical field of swimming pool filtration, in particular to a composite treatment method of a filter aid for swimming pool filtration, which comprises the following steps: S1, adding the filter aid: adding a powdered activated carbon filter aid into a filter through a feeding pump, and forming an activated carbon filter aid filter cake in the filter; s2, filtering: intercepting or adsorbing impurities when the water in the to-be-treated pond is filtered through an activated carbon filter aid filter cake and a filter, and continuously or intermittently supplementing a powdered activated carbon filter aid in order to maintain the filtering efficiency; s3, backwashing: when the pressure difference of the filter reaches a set value, backwashing is started, and intercepted and adsorbed pollutants and the activated carbon filter aid filter cake slurry are discharged into a drainage system together. The device has the effects of efficiently removing chloramine and other disinfection by-products, peculiar smell, pigment and other pollutants, guaranteeing the water quality safety of the swimming pool and maintaining normal operation of the swimming pool.

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.

A formulation delivery system for use with an outdoor cleaning device is provided. The formulation delivery system has a composition containing chlorine, wherein the composition is in the form of a solid chemical component, and the outdoor cleaning device is a spray bar that houses the composition. The chlorine is selected from the group consisting of calcium hypochlorite, 1,3,5-triazine-2,4,6(1H,3H,5H)-trione, 1,3-dichloro-sodium salt, dihydrate (dichloroisocyanuric acid), 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione (trichloroisocyanuric acid), chloramine-T hydrate, and combinations thereof. A spray bar is also provided that has a refill cartridge for housing the composition in solid form.

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 invention discloses a method for determining sulfate radicals in an ammonia chloride process electrolytic zinc solution, and relates to the technical field of solution ion content determination, and the method comprises the following steps: adding a precipitator into a sample solution to generate a barium sulfate precipitate; adding a magnesium source and a chelating agent, titrating by using a standard chelating agent solution under the condition that the pH value is 9-11 and the end point is indicated by an indicator, and measuring the volume V2 of the consumed chelating agent; taking the same amount of sample solution, indicating the end point by using the indicator under the same pH value, titrating by using the standard chelating agent solution, and measuring the volume V3 of the consumed chelating agent; carrying out a blank experiment, and measuring the volume V1 of the consumed chelating agent; and calculating the content of sulfate radicals in the electrolytic zinc sample solution according to V1, V2, V3, the volume V of the sample solution and the concentration of the standard chelating agent solution. According to the method, the influence of a zinc matrix, calcium and magnesium is quantitatively eliminated, so that the determination result is highly matched with the actual content, and the color change of a titration end point is sharper by adding a magnesium source.

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.

The invention discloses a method for detecting the concentration of halogen in liquid chloromethane, which comprises the following steps: S1, preparing an acetic acid-sodium acetate buffer solution, a phenol red solution, a chloramine-T solution and a sodium thiosulfate solution for later use, volatilizing the to-be-detected liquid chloromethane with a fixed volume at normal temperature, and then adding water to dilute the to-be-detected liquid chloromethane to the original volume so as to obtain a test solution A; taking the test solution A with the volume of W1, adding hydrochloric acid to adjust the pH value to 4.4-5, adding water to dilute until the volume is W2, and uniformly shaking to obtain a test solution B; s2, taking N groups of test solutions B, respectively adding an acetic acid-sodium acetate buffer solution with the volume of K1 and a phenol red solution with the volume of K2 into each group of test solutions B, uniformly shaking, adding a chloramine-T solution with the volume of K3, uniformly shaking, adding a sodium thiosulfate solution with the volume of K4, uniformly shaking, adding water to dilute until the volume is W0, uniformly shaking, and standing to obtain N groups of solutions to be detected, and respectively measuring the absorbance of each group of solution to be measured at the wavelength lambda. The method can accurately detect the concentration of the halogen in the liquid chloromethane.

The utility model relates to a waterworks disinfectant automatic adding system which comprises a flow meter arranged at the front end of a clean water tank, a first online ammonia nitrogen meter, a second online ammonia nitrogen meter arranged at the rear end of the clean water tank, an online total chlorine meter, an online free chlorine meter and a sodium hypochlorite adding pump capable of adding a sodium hypochlorite solution to the front end of the clean water tank. The system further comprises an ammonium sulfate feeding pump, a rear end feeding port for feeding an ammonium sulfate solution to the rear end of the clean water tank, and a front end feeding port for feeding an ammonium sulfate solution to the front end of the clean water tank. The automatic control system is used for sending a control output signal to the sodium hypochlorite adding pump according to input data of the flow meter, the first online ammonia nitrogen meter, the second online ammonia nitrogen meter, the online total chlorine meter and the online free chlorine meter, and can automatically adjust the adding amount of sodium hypochlorite and ammonium sulfate to ensure that a proper amount of chloramine is generated; therefore, the taste of drinking water is improved and the water quality safety is guaranteed.

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.

The invention relates to the technical field of high polymer material analysis and detection, in particular to a method for detecting the content of polymeric microspheres, which comprises the following steps: (1) obtaining a to-be-detected solution in which suspended particles and organic impurities are removed; (2) mixing the to-be-detected solution with an excessive potassium iodide solution, and adjusting the pH value to obtain a mixed solution; (3) adding excessive sodium hypochlorite solution into the mixed solution to oxidize acylamino in the polymer microspheres to generate chloramine; (4) adding an acetic acid solution to terminate the reaction to generate elemental iodine; (5) titrating the generated iodine through a standard sodium thiosulfate solution, and recording the consumption volume; and (6) calculating the content of the polymer microspheres. By optimizing the sample treatment process and introducing an anti-interference mechanism, the accuracy and reliability of the detection result are remarkably improved.

The invention relates to the technical field of crude oil component analysis, in particular to a method for analyzing double bond positions of olefin compounds based on nitrogen heterocyclic reaction. The method comprises the following steps: mixing an olefin-containing substance to be detected with a reaction reagent, carrying out a derivatization reaction, and then carrying out ionization and mass spectrometry to obtain a first spectrogram of a derivatization sample; dissociating a product of the derivatization reaction to obtain a second spectrogram of fragments; comparing and analyzing the first spectrogram and the second spectrogram, and deducing the number and position of double bonds of the olefin compound in the object to be detected; the reaction reagent is selected from chloramine-T or hydroxylamine sulfonic acid.

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.

The invention belongs to the technical field of soluble zinc determination, and particularly relates to a method for determining the content of soluble zinc in a raw material for producing electrolytic zinc by a chlorine-ammonia method. The method comprises the following steps: firstly, carrying out ammoniacal leaching on raw materials for producing electrolytic zinc by using a chloramine method, then carrying out primary precipitation and impurity removal on metal impurity elements in a dissolved leaching solution by using a chemical precipitation method, and further eliminating the influence of unremoved metal impurity ions such as lead ions, cadmium ions, iron ions, copper ions and aluminum ions by using a masking agent. The accuracy of the determination result is improved, the soluble zinc content of the raw material is truly reflected, and the industrial production is better guided.

The invention discloses a method for separating and purifying 125I labeled proteoglycan macromolecules, which comprises the following steps: dissolving proteoglycan macromolecules in water, and carrying out preliminary filtration through a dialysis bag to remove impurities; performing radiolabeling on the proteoglycan macromolecules by using a chloramine T method to obtain a labeled product; dropwise adding the labeled product into a G25 gel column, carrying out centrifugal graded elution, collecting different products, and monitoring the radioactivity count and radiochemical purity of each product. According to the method for separating and purifying the 125I-labeled proteoglycan macromolecules, preliminary filtration is performed through a dialysis bag, then the 125I-labeled proteoglycan macromolecules are subjected to graded elution by using a G25 gel column, complex equipment is not needed, operation is easy and convenient, and the method has the advantages of being high in recovery rate, wide in application range and the like; the method can be used for accurately purifying the iodine-125 labeled proteoglycan macromolecules, and has relatively high stability and reliability.

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 invention relates to the technical field of urea detection, in particular to a urea residue detection kit and a detection method thereof. The provided urea residue detection kit comprises the following components: a phosphate-EDTA buffer solution with a concentration of 20-22 mmol / L; an alkaline sodium hypochlorite solution with a concentration of 30-32 mmol / L; a color developing solution containing 0.8 to 1.0 mmol / L of phenol-sodium nitroprusside; the invention discloses an elisa plate coupled with urease. According to the kit, urea can be hydrolyzed by urease to generate ammonium ions and carbon dioxide, chloramine generated by oxidation of sodium hypochlorite and phenol are catalyzed by sodium nitroferricyanide under an alkaline condition to generate blue indophenol blue, a product has a characteristic absorption peak at 630 nm, and the content of urea is determined through the change of a light absorption value. The detection kit is high in sensitivity, high in detection speed, clear in result judgment, good in durability and beneficial to wide application.

The invention discloses a method for determining chloride ions in an ammonia chloride process electrolytic zinc solution, and relates to the technical field of determination methods, and the method comprises the following steps: preparing a subacid sample solution; adding a quantitative silver nitrate standard solution; heating to a slight boiling state for 1-2 minutes, and cooling to room temperature; adding an indicator; titrating excessive silver nitrate with the ammonium thiocyanate standard solution, determining a titration end point according to the change of the indicator, and recording the consumption volume of the ammonium thiocyanate standard solution; carrying out a blank experiment, and recording the consumption volume of the ammonium thiocyanate standard solution; and calculating the concentration of chloride ions in the chlorine-containing solution according to a titration result. According to the method, a quantitative silver nitrate standard solution is added into a subacid sample solution, chloride ions become silver chloride precipitates, an indicator is added, and excessive silver nitrate is titrated with an ammonium thiocyanate standard solution, so that the concentration of the chloride ions in the electrolytic zinc solution can be accurately and quickly measured, the detection speed is increased, and the detection accuracy is improved. And errors caused in the dilution process of the spectrophotometric method are reduced.

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 present invention discloses a method and system for determining ammonium chloride in an electrolytic zinc solution using a chloramine process. The method comprises: obtaining a zinc solution sample; delivering the zinc solution sample to a plurality of conical flasks according to a preset first volume to obtain a plurality of conical flasks containing the zinc solution; dividing the plurality of conical flasks containing the zinc solution into two groups, namely a first group and a second group; adding a preset first combination of auxiliary materials to the conical flasks containing the zinc solution in the first group to obtain a consumed volume of EDTA standard solution V1; sequentially adding the EDTA standard solution with a volume of V1 and a preset second combination of auxiliary materials to the conical flasks containing the zinc solution in the second group to obtain consumed volumes of sodium hydroxide standard solution V2 and V3; and obtaining a measured molar concentration of ammonium chloride in the zinc solution sample based on the consumed volumes of sodium hydroxide standard solution V2 and V3. The present invention can improve the determination accuracy of ammonium chloride in the electrolytic zinc solution.

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 cleaning agent for the aromatic polyamide-based reverse osmosis membrane comprises an aqueous solution containing a stabilized halogen and a silicic acid compound. The aromatic polyamide reverse osmosis membrane is cleaned using a cleaning solution containing a diluted aqueous solution of the cleaning agent. As the stabilizing halogen, it is preferable that a chloramine compound obtained by mixing a compound having a primary amino group with hypochlorous acid and / or hypochlorite.

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.

A method and an apparatus determine a concentration of monochloramine in a water system. The apparatus (10) is a three-electrode amperometric sensor that receives voltages from a waveform generator. The sensor senses currents responsive to the voltages. The currents are further responsive to concentrations of free chlorine and monochloramine. Current values responsive to the sensed current are provided to a system controller (42). The waveform generator (210) generates an activation waveform, followed by a free chlorine measurement waveform, followed by a second activation waveform, followed by a combined chlorine measurement waveform. The system controller converts an average of current values obtained when the free chlorine measurement waveform is applied to a free chlorine concentration; converts an average of current values obtained when the combined chlorine measurement waveform is applied to a combined chlorine concentration; and calculates a difference of the two averages as a monochloramine concentration.