63 results about "Hypochlorite" patented technology

The application provides a method for preparing 2-hydroxy-1,4-naphthoquinone, which comprises the following steps: S1: dispersing 2-naphthol, a phase transfer catalyst and a base in water to obtain a 2-naphthol alkali solution; S2: adding a hypochlorite aqueous solution to the 2-naphthol alkali solution at 5-30 DEG C, and then increasing the temperature to 50-60 DEG C to react, so that 2-naphthol is oxidized to an intermediate isomerization and rearrangement to generate 2-hydroxy-1,4-naphthoquinone salt, and a 2-hydroxy-1,4-naphthoquinone salt solution is obtained; S3: adjusting the pH of the 2-hydroxy-1,4-naphthoquinone salt solution, so that the 2-hydroxy-1,4-naphthoquinone salt is converted into 2-hydroxy-1,4-naphthoquinone and precipitated, and a 2-hydroxy-1,4-naphthoquinone crude product is obtained. The method uses 2-naphthol as a raw material, and high-purity and high-yield 2-hydroxy-1,4-naphthoquinone is obtained, while the safety hazards and environmental burdens caused by the use of a large amount of peroxide oxidants and metal catalysts are avoided, the process flow is simplified, and the method is more suitable for industrialization.

The present invention relates to electrodes for hypochlorite evolution, comprising an electrically conductive substrate and a catalytic coating applied on the substrate, and a multilayer process for manufacturing the same.

The application discloses a fluorescent probe and a detection method for continuously detecting copper ions and hypochlorite. The fluorescent probe is a triphenylamine compound containing an acylhydrazone group and has a structure shown in formula (I). The complex of the application is used as a fluorescent probe for detecting hypochlorite in an aqueous solution, and shows a clear fluorescence enhancement response, has a fast response speed, and can realize real-time detection of hypochlorite. The detection sensitivity is high, and the detection limit is as low as 120 nM. By using a standard curve, the concentration of hypochlorite in a to-be-detected sample can be accurately quantitatively analyzed, especially the concentration of hypochlorite in a commercially available disinfectant sample. The hypochlorite has ultrahigh selectivity, and other common anions have almost no interference. The detection method provided by the application can realize rapid detection of harmful substances, copper ions and hypochlorite, is more efficient, and has a relatively low cost.

The application provides a preparation method of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane, which comprises the following steps: S1: under a protective atmosphere, uniformly mixing hexafluoroacetone trihydrate with salicylamide, stirring, temperature rising, temperature control and dropwise adding Eaton reagent, after reaction, temperature falling, ice water quenching, filtering, water washing, ethanol beating, and drying to obtain compound (I); S2: under the protective atmosphere, adding the compound (I) obtained in step (1) into a hypochlorite and alkali solution, stirring, dissolving, temperature rising and reaction, after reaction, post-treatment is carried out to obtain compound (II). The application has the beneficial effects that the preparation method is novel, raw materials are easy to obtain, selectivity is good, the overall preparation cost is low, the yield is high, and the method is suitable for industrial production.

The application relates to a platinum complex fluorescent probe and application thereof in hypochlorite detection and trivalent metal ion detection. The structure formula of the platinum complex fluorescent probe is shown in the following formula. The platinum complex fluorescent probe described in the application has good selectivity and high sensitivity to hypochlorite and trivalent metal ions, fills the blank that no compound capable of detecting both hypochlorite and trivalent metal ions is found in the prior art, and meanwhile, the preparation method of the platinum complex fluorescent probe has mild reaction conditions.

A method (100) of providing an on-demand prepared hypochlorous acid gel composition based on an alkaline solution comprising a hypochlorite at a concentration of less than or equal to about 10,000 ppm and having a pH in the range of about 12.0 to about 13.0, and an acidic solution comprising a pH sensitive polymeric thickener and a pH adjusting agent, when the acidic solution is combined with the alkaline solution, a hypochlorous acid gel can be formed. The alkaline solution and the acidic solution are preserved separately prior to use, and the alkaline solution and the acidic solution are combined immediately prior to or during use to form the hypochlorous acid gel composition when the pH of the mixture is between about 5.0 and about 7.0. In a compositional aspect, the system may be composed of two, three, four, or multiple components for on-site immediate formation of hypochlorous acid gels to achieve on-demand preparation functionality.

The invention belongs to the field of organic synthesis, and particularly relates to a method for preparing an N, N-difluorobenzenesulfonamide compound under a fluorine-free gas condition. The method comprises the following steps: by taking a benzenesulfonamide compound as an initiator, preparing N-chlorobenzenesulfonamide sodium salt from the benzenesulfonamide compound by using tert-butyl hypochlorite, generating N-fluoro-N-chlorobenzenesulfonamide by using Selectfluor oxidation, and selectively reducing the N-fluoro-N-chlorobenzenesulfonamide into N-fluorobenzenesulfonamide by using sodium borohydride, thereby obtaining the N-fluorobenzenesulfonamide. And finally, carrying out fluorination by using a Selectfluor reagent, so as to generate the target product N, N-difluorobenzenesulfonamide. The method does not need to use highly toxic fluorine gas, the synthesis condition is mild, the separation condition is simple, and the yield is high.

The present invention concerns a process for decolorizing a polyolefin composition, the process comprising the steps of a) providing a polyolefin composition comprising at least one polyolefin and at least one organic chromophore, b) mixing the polyolefin composition in a melt state at a temperature of 170 to 290° C. with an inorganic oxidizing agent, wherein the inorganic oxidizing agent is selected from the group of inorganic peroxides and hypochlorites, and c) obtaining a decolorized polyolefin composition.

This utility model relates to the field of sodium hypochlorite production technology and discloses a sodium hypochlorite production system, including a feeding unit, an electrolysis unit, and a storage unit. The feeding unit includes a softening section, a heat exchange section, and a salt dissolving section. The softening section generates softened water. The heat exchange section and the salt dissolving section are connected in parallel on one side of the softening section. The heat exchange section is used to regulate the temperature of the softened water to generate dilution water. The salt dissolving section is used to dissolve the softened water and salt to obtain brine. The electrolysis unit includes a dilution tank and an electrolytic cell. The dilution tank is used to mix and dilute the dilution water and the brine to obtain diluted brine. The electrolytic cell is used to electrolyze the diluted brine to generate sodium hypochlorite. The storage unit is used to store the sodium hypochlorite generated by the electrolysis unit. This utility model has the beneficial effect of high sodium hypochlorite production efficiency.

The invention relates to the technical field of oil and gas fracturing flow-back fluid treatment, and particularly discloses a boron-doped diamond electrode electrooxidation system and method for treating fracturing flow-back fluid. According to the method for treating the fracturing flow-back fluid, before the fracturing flow-back fluid enters an electrooxidation unit, sulfide is efficiently removed, poison and competitive oxidation of the fracturing flow-back fluid to an electrode are eliminated, a BDD electrode is protected, a foaming agent is synchronously removed through aeration enrichment, the problem of foam interference in the flow-back fluid treatment process is fundamentally solved, and continuous and stable operation of a system is guaranteed; after the electro-oxidation unit, active chlorine (pypocholoride / chlorine) is effectively removed and recycled, so that waste is treated by waste, the oxidation efficiency is improved, and the dosage of chemicals is reduced. Through the collaborative design, the interference and foam problems of sulfide with high chloride ion content and strong reducibility are collaboratively optimized, and the treatment efficiency, economical efficiency and stability of the system are integrally improved.

The application belongs to the technical field of medicine synthesis, and provides a new preparation method of isoflurane. The method uses hypochlorite and a strong acid as a chlorinating reagent to perform chlorination, which avoids the problems of low conversion rate and excessive chlorination to generate more impurities caused by chlorine gas chlorination. The reaction is more moderate, economical, environment-friendly and high-yield, and is suitable for industrial production.

The utility model discloses a device for preventing secondary crystallization of subcholafite in the conveying process of old brine in a salt pan, which comprises a brine pipe, a brine pump connected with the brine pipe, an adsorption tower connected with the brine pump and a liquid storage tank connected with the adsorption tower, and is characterized in that an inlet of the brine pipe is connected with a subcholafite diluting device; the subchlorite diluting device comprises a diluting water tank, the diluting water tank is connected with a diluting water pipe, the diluting water pipe is connected with a diluting water pump, one end of the diluting water pipe is provided with a diluting distributor, and the diluting water pipe is fixedly connected with the brine pipe through the diluting water distributor; according to the dilution water dilution equipment provided by the device, brine crystal minerals at the inlet of the upstream brine pipeline pump are dissolved technologically, pipeline crystallization can be avoided, blockage of a subsequent system is reduced, stable operation of the equipment is ensured, and the brine conveying efficiency is improved.

The object of the present invention is to provide a catalyst for chloride ion oxidation reaction that has high oxidation efficiency of chloride ions in the electrolysis of water containing chloride ions while reducing the amount of precious metals used, to provide an electrode for chloride ion oxidation reaction that has high oxidation efficiency of chloride ions, and to provide a production apparatus and method for hypochlorous acid or hypochlorite that has high production efficiency. [Solution] A catalyst for the oxidation reaction of chloride ions in the electrolysis of water containing chloride ions, wherein the catalyst contains ruthenium, and the ruthenium is contained in the crystal structure of α-type manganese dioxide.

The invention belongs to the technical field of fouling prevention and control, and particularly relates to a low-power-consumption electrolysis anti-fouling device for marine unmanned equipment and an application method of the low-power-consumption electrolysis anti-fouling device. The main body structure of the device comprises a copper composite electrode, a chlorine-producing anode arranged on the periphery of the copper composite electrode and a titanium cathode arranged in the center of the chlorine-producing anode; the application method comprises the following steps: determining the size of a fouling protection space and a maintenance and replacement period, calculating the size of the copper composite electrode and the boundary dimension of the device, arranging the positions of one or more sets of devices according to requirements, connecting the device with the marine unmanned equipment, and carrying out secondary pollution protection on the marine unmanned equipment. Copper ions generated through electrolysis serve as a main antifouling agent, chlorine prepared through seawater electrolysis serves as an auxiliary antifouling agent, the copper ions and hypochlorite are generated through intermittent electrolysis, marine organisms are prevented and treated, through electrode parameter matching, the electrolysis current is effectively reduced, the service life of a copper composite electrode is prolonged, electrolysis power consumption is reduced, and the stable antifouling effect with low power consumption is guaranteed.

This invention relates to a chlorination electrolyzer comprising a housing having an inlet and an outlet suitable for brine circulation; and at least one pair of bipolar electrodes facing each other and disposed within the housing. The electrolyzer is characterized in that each of the at least one pair of bipolar electrodes comprises: a valve metal substrate; an active coating disposed on the substrate comprising at least one layer of a catalytic composition containing ruthenium and titanium; and a top coating disposed above the active coating, comprising at least one layer of a composition containing oxides of tantalum, niobium, tin, or combinations thereof. The invention also relates to a self-cleaning electrolytic chlorination system comprising such an electrolyzer, a method for producing it, its use in normal and low-salinity tanks for hypochlorite-mediated water disinfection, and a method for hypochlorite-mediated water disinfection.

The application discloses a synthesis method of 2-chloro-3-methyl-4-methylsulfonylbenzoic acid, which is obtained by one-step oxidation of 2-chloro-3-methyl-4-methylsulfanyl acetophenone with freshly prepared hypochlorite, and the freshly prepared hypochlorite is prepared by passing chlorine into a strong alkaline aqueous solution. It is found through a large number of tests that the freshly prepared sodium hypochlorite can simultaneously oxidize acetyl and methylthio, while the conventional industrial sodium hypochlorite can only oxidize acetyl and cannot oxidize methylthio. Therefore, compared with the prior art, the method disclosed by the application has fewer reaction steps, avoids the use of expensive sodium tungstate catalyst, greatly reduces the production cost, and in particular, the reaction yield of the application is obviously higher than the two-step reaction yield of less than 50% in the prior art.

The invention relates to an MOFs (Metal-Organic Frameworks) fluorescent probe for hypochlorite detection and a synthesis method. The structural formula of the fluorescent probe is shown in the specification. The preparation method comprises the following steps: heating and stirring 2-(6-bromo-1, 3-dioxo-1H-benzo [de] isoquinoline-2 (3H)-yl) terephthalic acid and a mixture of N-hydroxyphthalimide, potassium carbonate and dimethyl sulfoxide to react, and then acidifying, filtering, washing and drying to obtain HIA; the preparation method comprises the following steps: performing ultrasonic dispersion on a mixture of zirconium tetrachloride, formic acid and N, N-dimethylformamide, then performing ultrasonic dispersion on the obtained mixture of HIA and N, N-dimethylformamide, mixing and sealing solutions subjected to two times of ultrasonic dispersion in a reaction kettle, reacting at the temperature of 120-150 DEG C, then performing centrifugal dispersion, collecting precipitates, washing and drying to obtain UiO-66-HIA. The response time of the synthesized UiO-66-HIA to hypochlorite is 5 seconds, and the detection limit is low and is 0.244 mu M.

A treatment liquid for cleaning a semiconductor wafer is a treatment liquid containing (A) a hypochlorite ion and (C) a solvent, in which pH at 25° C. is more than 7 and less than 12.0. A method for removing ruthenium and tungsten from a semiconductor wafer and cleaning the semiconductor wafer includes bringing the treatment liquid into contact with the semiconductor wafer containing ruthenium or tungsten is provided.

The present application relates to a kind of preparation method of red fluorescent carbon dots and application in detecting hypochlorite;Firstly, N,N'-(1,4-phenylene) bis(N-(4-aminophenyl) phenyl-1,4-diamine), tert-butyl hydroperoxide and hydrochloric acid are dispersed in ethanol, then the mixture is carbonized by solvothermal method, after separation and purification, the carbon dots of red fluorescent emission are obtained;The prepared red fluorescent carbon dots can be applied to the rapid detection of residual hypochlorite ions in utensils.Compared with prior art, the red fluorescent carbon dots in the present application have long emission wavelength, and the preparation method is simple, fast response (~10 seconds), high selectivity, wide applicable pH range (5-9), good reproducibility and other advantages, and has broad application prospect in rapid detection of residual hypochlorite in utensils.

The invention generally relates to compositions of hypochlorous acid (HOCl) and methods of manufacture thereof. In certain aspects, the invention provides air-free compositions of HOCl. In other aspects, the invention provides methods of making HOCl that involve mixing together in water in an air-free environment, a compound that generates a proton (H+) in water and a compound that generates a hypochlorite anion (OCl−) in water to thereby produce air-free hypochlorous acid.

The invention discloses a preparation method and application of a hypochlorite photoelectrochemical sensing platform, and belongs to the technical field of analytical chemistry. According to the preparation process, adopted raw materials are easy to obtain, and reaction conditions are mild and easy to control. The sensing platform is designed and synthesized based on phenothiazine-chromone photosensitive micromolecules as a photosensitizer, and photoelectrochemical (PEC) sensing is realized. The sensing platform has the characteristics of high specificity, high sensitivity and easiness in preparation, quantitative photoelectrochemical signals of pypocholoride can be realized, and the PEC detection electrode is 1.64 nM.

A system for producing hypochlorite, comprises an electrolyser with an inlet for receiving a saline solution and an outlet for the electrolysation products which include hydrogen and hypochlorite; a tank for separating hydrogen from hypochlorite, and a conduit for facilitating the flow of hydrogen and hypochlorite from the electrolyser to the tank; wherein the system further comprising a further conduit from the tank to the electrolyser to facilitate the circulation of hypochlorite from the tank to the electrolyser; wherein the system further comprises one or more of the following a) a heat exchanger which receives hypochlorite from the further conduit; whereby the temperature of the hypochlorite is adjusted prior to returning to said electrolyser; b) a pump for driving the circulation of hypochlorite from the tank to the electrolyser; the pump being configured to drawn in a saline solution for causing the circulation of the saline solution in conjunction with the hypochlorite solution to the electrolyser.

This invention discloses a fluorescent probe for detecting hypochlorite based on the synergistic effect of ESIPT and AIE in a benzothiazole structure, its preparation method, and its application, belonging to the field of fluorescent probe technology. The invention uses 2-aminobenzylthiophenol and 2-hydroxy-5-methoxybenzaldehyde as starting materials, condensing them to form a benzothiazole derivative as the fluorescent core. A diaminomaleitrile recognition group is introduced through an aldehyde-amine condensation reaction to synthesize the fluorescent probe. After the probe undergoes a specific oxidation reaction with hypochlorite, the C=N double bond breaks, and the ESIPT and AIE effects are synergistically activated, resulting in a significant enhancement of fluorescence. This probe exhibits a fast response, a linear range of 0-200 μM, a detection limit of 29.1 nM, excellent selectivity and anti-interference properties, and stability under pH 6-10 conditions, making it suitable for highly sensitive detection of hypochlorite in aqueous solutions and complex systems.

The present application relates to a kind of foam-rich mould-removing spray, it is characterized in that, by weight percentage, including the following components: sodium hypochlorite aqueous solution, by chlorine element: 1~8%;Base agent, by hydroxyl ion: 0.1~4%;Foam stabilizing component, by active substance: 1~8%;Chlorine stabilizer: 0.05~1%;Water: remainder;The base agent includes at least one of sodium hydroxide or potassium hydroxide;Active substance in the foam stabilizing component includes zwitterionic surfactant and alkyl benzene sulfonate.The present application creates a stable foam system in high alkali, high hypochlorite ion environment by the specific compounding of zwitterionic surfactant and alkyl benzene sulfonate.Successfully solved the technical problem that "strong oxidizing property" and "foam stability" are difficult to consider.

Disclosed herein is a method of extracting metal from a metal sulfide containing material comprising the steps of: a) providing an aqueous acidic oxidant mixture comprising water, an acid, an oxidising means, and a halide ion source, wherein the aqueous acidic oxidant mixture has a pH of less than 7; wherein the oxidising means comprises hydrogen peroxide, ozone, oxygen, chlorine, bromine, iodine, hypochlorous acid, hypobromous acid, hypoiodous acid, a hypochlorite salt, a hypobromite salt, a hypoiodite salt, a percarbonate salt, a persulfate salt, a permanganate salt, an anode connected to a power source, or combinations thereof; b) contacting the aqueous acidic oxidant mixture with the metal sulfide containing material to extract the metal from the metal sulfide containing material and form a metal halide solution; wherein the metal comprises copper, nickel, lead, zinc, or combinations thereof.

The invention belongs to the technical field of preparation of high-sensitivity fluorescent probes, and provides a preparation method of a cucurbit [7] urea-phenothiazine derivative fluorescent probe and application of the cucurbit [7] urea-phenothiazine derivative fluorescent probe in hypochlorite detection, and the preparation method comprises the following steps: mixing a cucurbit [7] urea solution, a phenothiazine derivative solution and water to obtain a fluorescent probe solution, namely the fluorescent probe. Compared with traditional instrumental analysis and detection methods such as high performance liquid chromatography and gas chromatography, the method has the advantages that sample treatment is simple, detection is convenient, real-time detection can be achieved, and the detection cost is greatly reduced. The probe can detect hypochlorite in a solution, the detection limit can reach 8.5 * 10 <-8 > mol / L, highly selective detection of hypochlorite by a single probe can be achieved, and the beneficial effects of rapid determination and real-time detection can be achieved.

The invention discloses a near-infrared double-state light-emitting platinum complex fluorescent probe and application thereof in hypochlorite detection. The structural formula of the near-infrared double-state light-emitting platinum complex fluorescent probe is shown in the specification. R1 and R2 are one of H, CH3, C2H5 and C (CH3) 3; the four technical elements of near-infrared emission, double-state luminescence, a platinum complex phosphorescent probe and hypochlorite specific recognition are integrated into the same molecular system for the first time, and a novel platinum complex fluorescent probe which keeps efficient near-infrared luminescence in a solution state and an aggregation state and realizes high-sensitivity and high-selectivity detection on hypochlorite is provided. The double dilemma of solid state quenching of a traditional ACQ material and weak luminescence of a solution of a classical AIE material are broken through, and the blank in the technical field is filled. The novel platinum complex fluorescent probe shows high selectivity, high stability, wide pH application range, low cytotoxicity and good biocompatibility on hypochlorite.

The application discloses a fluorescent probe for hypochlorite detection with molecular glue as a skeleton, and a preparation method and application thereof. 16 H 15 N3O5S. The preparation method of the fluorescent probe is simple, and the yield is high. Meanwhile, the probe can effectively eliminate the influence of other ions and free radicals, and exhibits the characteristics of quick response, high sensitivity and high selectivity in the hypochlorite detection.

Disclosed is a process for removing impurities from an intermediate product in battery material production including a) contacting a first intermediate product with a first aqueous medium to obtain a second intermediate product; and b) contacting the second intermediate product with a stream of a second aqueous medium until a conductivity of the stream of the second aqueous medium after contacting the second intermediate product is below about 1,000 micro-Siemens per centimeter (μS / cm).