238 results about "Hypochlorite" patented technology

A process for preparing a storage-stable aqueous solution comprising hypochlorous acid and / or hypochlorite includes introducing an aqueous NaCl solution into an electrolysis cell comprising a cathode compartment and an anode compartment separated by a membrane, wherein the aqueous NaCl solution is introduced into the cathode compartment via a first feed line and into the anode compartment via a second feed line, and wherein the aqueous NaCl solution comprises more than 100 ppm NaCl and has an electrical conductivity of less than 5 mS / cm, applying a direct current to a cathode in the cathode compartment and to an anode in the anode compartment to produce a cathode solution in the cathode compartment and an anode solution in the anode compartment, and mixing a portion of the cathode solution with the aqueous NaCl solution prior to its introduction into the anode compartment and / or with the anode solution in the anode compartment and / or with the anode solution in a discharge line associated with the anode compartment, to produce a storage-stable aqueous solution comprising hypochlorous acid and / or hypochlorite dischargeable via discharge line and has a pH value of 5 to 6.

The invention relates to a preparation method of 4-chlorophthalic acid, and relates to the technical field of organic synthesis.The preparation method of 4-chlorophthalic acid comprises the following steps that a compound 1 and alcohol are subjected to an alkoxylation reaction, and a compound 2 is obtained; in a reaction system containing acetic acid, the compound 2 and pypocholoride are subjected to a chlorination reaction, and a compound 3 is obtained; and sequentially carrying out hydrolysis reaction and acidification reaction on the compound 3 to obtain the 4-chlorophthalic acid. Compared with the existing 4-chlorophthalic acid monosodium salt technology, the preparation method of 4-chlorophthalic acid provided by the invention has the advantages that by adding acetic acid in the chlorination reaction, the reaction temperature is increased, the reaction time is shortened, the cost is reduced, and the defects in the prior art are made up.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of N, N '-dichloro-1, 4-benzenedicarboxamide, which comprises the following steps: taking terephthalamide as an initial raw material and tert-butyl hypochlorite as a chlorination reagent; the method comprises the following steps: carrying out a chlorination reaction on terephthalamide and tert-butyl hypochlorite in a solvent under the protection of inert gas by controlling the reaction temperature, and after the reaction is finished, carrying out post-treatment to obtain N, N-dichloro-1, 4-phthalimide. The preparation method of the N, N '-dichloro-1, 4-benzenedicarboxamide comprises the following steps: taking terephthalamide and tert-butyl hypochlorite as raw materials, and carrying out one-step reaction to generate a dichloro product. Compared with a traditional N, N '-dichloro-1, 4-benzenedicarboxamide production method, the preparation method has the advantages that the amount of three wastes generated is small, the product yield is high, the product purity is high, the operation is safe and convenient, and the preparation method is more suitable for industrial application.

The invention relates to a method for removing heavy metal complexes in wastewater, which comprises the following steps: S1, preparing a PMS composite agent which is prepared by ball-milling the following raw materials in percentage by weight: 50-90% of persulfate, 5-30% of sulfite and 5-20% of pypocholoride; s2, the PMS composite agent obtained in the S1 is added into industrial wastewater containing a heavy metal complex, heavy metal in the heavy metal complex is Cu and one or more of Co, Cr, Ni, Pb and Zn, complex in the heavy metal complex is one or more of EDTA, NTA, citric acid, oxalic acid, tartaric acid and sorbic acid, the mixture is stirred and dissolved, alkali liquor is added to maintain the pH of the industrial wastewater to be 9.5-11.0, and the PMS composite agent is obtained after the reaction is completed. Carrying out Fenton-like oxidation complex breaking reaction, and carrying out post-treatment after the reaction is finished, so as to obtain the reclaimed water. According to the method, the purpose of removing the heavy metal complex in the wastewater by the in-situ activation of the persulfate is achieved under the condition of not additionally adding a catalyst or applying energy sources such as electricity, ultraviolet and the like.

The present application relates to a kind of methods for removing heavy metal complex in wastewater, comprising the following steps, S1 configuration PMS composite reagent, the PMS composite reagent is made by including the following weight percentage of raw material ball milling, persulfate 50~90%, sulfite 5~30%, hypochlorite 5~20%;S2 in the heavy metal complex-containing industrial wastewater join the PMS composite reagent obtained in the S1, heavy metal in heavy metal complex is Cu, and one or several of Co, Cr, Ni, Pb and Zn, complex in heavy metal complex is one or several of EDTA, NTA, citric acid, oxalic acid, tartaric acid, sorbic acid, stirring is dissolved, and lye is added to maintain the pH of industrial wastewater to 9.5~11.0, and carries out fenton-like oxidation and breaks the complex reaction, after reaction, aftertreatment is obtained, and the regenerated water is obtained.The present application achieves the purpose of removing heavy metal complex in wastewater by the method of in-situ activation of persulfate without additional catalyst or the application of electricity, ultraviolet and other energy.

The invention discloses a novel preparation method of basic magnesium hypochlorite and application of the basic magnesium hypochlorite in magnesium-based flame-retardant antibacterial filler. The novel preparation method comprises the following steps: under the assistance of pulsed ultrasound, adding a buffer solution into a sodium hypochlorite solution to adjust the pH value to 9.0-10.5; then adding a magnesium chloride solution for reaction to prepare basic magnesium hypochlorite; intermittent pulses are adopted in the pulse ultrasound, the frequency is 20-40 kHz, and the power density is 100-500 W / L; the pulse ultrasonic technology is introduced, the reaction process can be optimized through the cavitation effect and the micro-mixing effect, the pH distribution of a reaction system is optimized through pulse ultrasound, local overhigh alkalinity is avoided, generation of magnesium hydroxide is inhibited, the particle size of a product can be effectively reduced, and the yield of the product is improved. High-purity basic magnesium hypochlorite (Mg (OH) 2 is less than 1wt%), high available chlorine (greater than or equal to 41%) and narrow particle size distribution (D50lt; and when the flame-retardant antibacterial filler is used as the flame-retardant antibacterial filler, the performance is more excellent.

The invention relates to the technical field of chemical mechanical polishing solutions, in particular to a chemical mechanical polishing solution for silicon carbide and a preparation method thereof, the polishing solution comprises a catalyst, abrasive particles, a dispersing agent, an oxidizing agent, a surfactant, an acid-base regulator and deionized water; the catalyst is nano platinum particles; the abrasive particles are aluminum oxide; the dispersing agent is at least one of sodium polyacrylate, sodium hexametaphosphate, hexadecyl trimethyl ammonium bromide and the like. The oxidizing agent is at least one of permanganate, pypocholoride, dichromate and the like; the surfactant is at least one of sodium dodecyl benzene sulfonate, organic bentonite and the like; the pH regulator is at least one of phosphoric acid, nitric acid, oxalic acid and citric acid. The polishing solution can effectively improve the removal rate of silicon carbide, and meanwhile, a polished silicon carbide wafer is high in flatness and free of scratches.

The invention discloses a calcium-iron-magnesium composite catalyst, a preparation method thereof and application of the calcium-iron-magnesium composite catalyst in catalyzing pypocholoride to oxidize and degrade organic / inorganic wastewater. The preparation method comprises the following steps: dissolving calcium salt, magnesium salt and ferric salt in water, then adding a strong alkali solution to carry out hydrolysis coprecipitation reaction, and sequentially carrying out centrifugal separation, washing, drying and grinding on the obtained precipitation product to obtain the calcium-iron-magnesium composite catalyst. The catalyst has good chemical stability and high catalytic activity, avoids the use of harmful transition metals or noble metals, is used for catalyzing pypocholoride to degrade organic or inorganic pollutants in organic / inorganic wastewater, and shows the characteristics of high oxidative degradation rate, thorough oxidative degradation, high pypocholoride utilization rate and the like; the invention aims to solve the problem that the catalytic oxidation effect is poor when the existing pypocholoride is applied to removal of organic or inorganic pollutants which are difficult to oxidize and degrade.

The present invention comprises: a temperature information acquisition unit (120) that acquires first temperature information indicating the temperature of water being treated that is supplied to a reaction tank (180) in which urea in water being treated is treated; a temperature information acquisition unit (130) that acquires second temperature information indicating the temperature of the water being treated that is within the reaction tank (180) or is discharged from the reaction tank (180); and an addition amount adjustment unit (150) that, on the basis of the result of comparing the temperature indicated by the first temperature information and the temperature indicated by the second temperature information, adjusts at least one of the amount of bromide salt added to the water being treated and the amount of hypochlorite added to the water being treated.

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 a method for decolorizing a polyolefin composition, 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 molten state at a temperature of 170° C. 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.

The invention relates to a fluorescent probe applied to hypochlorous acid detection and a preparation method and application thereof, and belongs to the field of fluorescent probes. The preparation method of the probe comprises the following steps: reacting 1, 3-indandione with malononitrile under the catalysis of sodium acetate to obtain a compound 1, and then respectively synthesizing the compound 1 and the 1, 3-indandione with 4-dimethylamino cinnamyl aldehyde through nucleophilic addition reaction to synthesize a fluorescent probe 1 and a fluorescent probe 2. The prepared fluorescent probe can still specifically recognize hypochlorite ions even in various ion environments, has good selectivity to the hypochlorite ions, is high in specificity, simple to operate in the testing process and extremely sensitive in reaction, ensures rapid detection, can be directly used in water, greatly improves the detection convenience, and has a wide application prospect. And real-time monitoring and field application can be realized.

The invention relates to a pyridinium-based hypochlorite detection probe and a preparation method thereof. The structure of the fluorescent probe is as shown in a formula I. The fluorescent molecular probe is prepared by taking o-alkynyl aldehyde as a raw material and carrying out condensation reaction on the o-alkynyl aldehyde and pyridinium salt. The probe synthesis method is simple, the reaction condition is mild, and the yield of the target compound is high. The fluorescent molecular probe is stable in optical performance, high in hypochlorite detection sensitivity and low in lower detection limit, the detection limit is 0.38 mu M, and the response range is 5-200 mu M. The selectivity is good, and no response is caused to fluorine ions, iodide ions, perchlorate ions, hydrogen sulfate ions, sulfate ions, acetate ions, thiocyanate ions, sulfur ions and the like. The fluorescent molecular probe provided by the invention has practical application value in the fields of biochemistry and environmental chemistry, especially detection of hypochlorite ions in water and the like. # imgabs0 #

The invention relates to an impurity removal method of a chlorine dioxide vertical generator, which comprises the following steps: adding first pure water and a sodium hypochlorite solution into the chlorine dioxide vertical generator, continuously boiling under a vacuum condition, cooling and discharging liquid; washing with second pure water and discharging liquid; the boiling temperature is lower than 80 DEG C. Different from the prior art, the technical scheme provides a mode for efficiently removing impurities in a mode that the sodium hypochlorite solution is boiled at the temperature lower than 80 DEG C, the boiling temperature in the mode is lower than the efficient decomposition temperature 80 DEG C of hypochlorite, the hypochlorite is high in stability, the decomposition amount is small although the hypochlorite is boiled, and therefore the impurity removing efficiency is higher; the chlorine dioxide vertical generator impurity removal device has the advantages of simple and effective impurity removal of the chlorine dioxide vertical generator, no residue, reduction of the decomposition of chlorine dioxide, and improvement of the production efficiency and the production safety.

The application discloses a kind of distinguishable detection hydrazine and hypochlorite organic small molecule compound and its preparation method and application.By diketopyrrolopyrazole and nitrogen-containing aromatic primary amine condensation reaction, coordination with BF3.Et2O obtains the PzDP-PPAB compound with electronic push-pull effect, and its maximum absorption peak and emission peak are located in near infrared region.PzDP-PPAB and hydrazine and hypochlorite carry out irreversible chemical reaction in organic solvent, and the distinguishable detection of two kinds of substances can be realized, the detection limit of hydrazine is 0.04 μmol / L, and the detection limit of hypochlorite is 0.059 μmol / L, with simple operation, reaction sensitivity, naked eye detection and the like.

The invention relates to the technical field of wastewater treatment, and proposes a method for treating wastewater containing tetramethylammonium hydroxide, comprising the following steps: adjusting the pH value of wastewater containing tetramethylammonium hydroxide to 7-7.5, adding hypochlorite, sodium bicarbonate, sodium acetate and mesoporous silica, mixing, reacting, settling, and discharging water. Through the above technical scheme, the problem of low decomposition rate of tetramethylammonium hydroxide in the prior art is solved.

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.

To provide a sterilization method that allows simple sterilization of spore-forming bacteria while suppressing degradation of an object to be sterilized.SOLUTION: A method for sterilizing spore-forming bacteria, using an aqueous solution (X1) containing (A1) component: a specific anionic surfactant, and (B1) component: a specific acid, or an aqueous solution (X2) containing (A2) component: alkylbenzenesulfonic acid, wherein the aqueous solutions (X1) and (X2) may contain (C) component: hypochlorite, a content of the (A1) component is 0.001 to 1 mass%, a content of the (B1) component is 0.001 to 5 mass%, a content of the (A2) component is 0.002 to 6 mass%, a content of the (C) component is 0 to 0.001 mass% in terms of effective chlorine concentration, a pH of the aqueous solutions (X1) and (X2) at 25°C is 1.5 or more and less than 5, and the aqueous solution (X1) or (X2) is heated to 50 to 100°C and brought into contact with spore-forming bacteria to sterilize the spore-forming bacteria.SELECTED DRAWING: None

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 present application relates to a kind of hypochlorite detection probe based on pyridine salt and preparation method thereof.The fluorescence probe structure is as shown in formula I.The fluorescent molecular probe of the present application is prepared from o-alkynyl aldehyde as raw material, by condensation reaction with pyridine salt.The probe synthesis method is simple, and the reaction condition is mild, and the yield of target compound is high.The fluorescent molecular probe described in the present application has stable optical performance, high sensitivity for hypochlorite detection, low detection lower limit, detection limit is 0.38 μM, response range is 5-200 μM.It has good selectivity, and has no response to fluoride ion, iodine ion, perchlorate ion, bisulfate ion, sulfate ion, acetate ion, thiocyanate ion, sulfur ion, etc.The fluorescent molecular probe described in the present application has practical application value in the field of biochemistry and environmental chemistry, especially the detection of hypochlorite ion in water, etc.

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 invention discloses a method for improving the property of dry farmland soil by using low-concentration hypochlorous acid, which comprises the following steps: after the soil is turned over to be fluffy, uniformly spraying persulfate solutions with different concentrations on the surface, and controlling the water-soil ratio to be 1: 2; the invention further discloses application of the method in the process of improving basic physicochemical properties of farmland soil. The pypocholoride with different concentrations is added into the dry land soil, so that the quality of the dry land soil is improved. By applying a low dosage of sodium hypochlorite oxidizing agent to the long-term cultivated dry land soil, the soil quality can be improved, for example, the content of soil dissolved organic carbon (DOC) and bio-available iron, manganese, zinc and the like is increased, the number of harmful fungi is reduced, the structure of a soil microbial community is improved, the recovery speed of the soil microbial community is increased, and the soil productivity is rapidly improved.

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.

A method of cleaning residue containing ruthenium (Ru) residue on at least one surface of a component of a semiconductor processing chamber is provided. The residue is exposed to a Ru cleaning composition comprising at least one of hypochlorite and O3 based chemistries, wherein the Ru cleaning composition removes the Ru residue.

To enhance the storage stability of a bleaching composition for hard surfaces.SOLUTION: A bleaching composition for hard surfaces comprises: component (A) a hypochlorite; component (B) an acrylic polymer; component (C) an alkali agent; component (D) at least one selected from an aromatic sulfonic acid compound having at least one selected from a methyl group and a methoxy group on a benzene ring and a salt thereof; and component (E) a dye, wherein the mass ratio of the content of the (E) component to the content of the (D) component, represented as (E) / (D), is 0.001 or more and less than 0.025.SELECTED DRAWING: None

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 belongs to the technical field of fluorescence detection, and in particular relates to a method for detecting hypochlorite (ClO ‑ ) and phosgene (COCl2) fluorescent probes and their preparation methods and applications. The probe is 7-(diethylamino)-2-oxy-1,2-dihydroquinoline-3-formaldehyde oxime (abbreviated as DOQC). 3-Formyl-7-diethylaminoquinoline-2( 1H )-ketone, hydroxylamine hydrochloride, solvent, and acid binding agent were added to the reaction bottle, stirred, and heated until the reaction was completed. The reaction progress was monitored by thin layer chromatography, and the fluorescent probe DOQC was obtained after filtration and purification. ‑ After the reaction of COCl2 and probe DOQC, the fluorescence color and intensity of the solution changed. This change has the characteristics of high selectivity and high sensitivity. ‑ , COCl2 rapid practical detection has improved new methods and application prospects.

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.

To provide a method for manufacturing a new germicidal disinfectant from sodium hypochlorite degraded during storage.SOLUTION: A method for manufacturing a new germicidal disinfectant from a solution including hypochlorite ion, chloric ion, and chloride ion, includes: a first reaction process of adding sulfuric acid to the solution and generating chlorine gas; a process of reacting the chlorine gas generated in a recovery liquid A with sodium hydroxide or calcium hydroxide and recovering it as hypochlorite ion; a second reaction process of adding sulfuric acid having higher concentration than that in the first reaction process to a reaction mother liquid after the first reaction process and generating chlorine dioxide gas; a process of reacting the generated chlorine dioxide gas with sodium hydroxide and hydrogen peroxide in a recovery liquid B and recovering it as chlorous acid ion; and a process of blending the recovery liquid A with the recovery liquid B to obtain the new germicidal disinfectant.SELECTED DRAWING: None