27 results about "Chlorous acid" patented technology

Provided is a method for producing a chlorous acid water preparation in which chlorous acid water, chlorous acid as a main effective component thereof, and chlorine peroxide radicals as active molecular species thereof have been more efficiently stabilized in the liquid at ordinary temperature in high and low concentrations. The method is for producing a chlorous acid water preparation having a predetermined content (in terms of chlorous acid (HClO2=68.46)), and comprises: (1) preparing a buffer solution; (2) obtaining the concentration of the buffer solution; (3) preparing chlorous acid water; (4) obtaining a content in the chlorous acid water (in terms of chlorous acid (HClO2=68.46)); (5) obtaining an amount of the buffer solution required for dilution, from the content in the chlorous acid water (in terms of chlorous acid (HClO2=68.46)) and the predetermined content (in terms of chlorous acid (HClO2=68.46)); and (6) diluting the chlorous acid water with said amount of the buffer solution to produce a chlorous acid water preparation having the predetermined content (in terms of chlorous acid (HClO2=68.46)).

The invention discloses a preparation method of an antibacterial non-woven fabric and a novel coated antibacterial non-woven fabric, and the method comprises the following steps: adding a sodium chlorite solution and a hydrochloric acid solution into a reaction container, and carrying out a reaction under heating and stirring conditions to generate a mixed gas of chlorine dioxide and chlorine; the obtained gas passes through a ferrous chloride solution, and chlorine in the mixed gas is removed; introducing the obtained gas into pure water, adding a complexing agent and a stabilizer, and uniformly mixing and stirring to obtain the chlorine dioxide activation-free solution. On the premise of ensuring efficient removal of harmful gas, sterilization and peculiar smell removal, good durability is kept, large-scale production can be realized under a manufacturing process with certain requirements, the safety is high, the cost is relatively controllable, and a good market prospect is achieved.

To provide a coronavirus killing agent.SOLUTION: The present disclosure provides coronavirus killing agents. In particular, the present disclosure provides a coronavirus disinfectant comprising a chlorous acid aqueous solution. In particular, the present disclosure provides a method for killing or disinfecting coronavirus using a chlorous acid aqueous solution. The concentration of free chlorine (assuming Cl = 35.45) in a chlorous acid aqueous solution can be at least 5ppm or higher in the absence of organic matter. The content of chlorous acid in the chlorous acid aqueous solution (HClO2 = 68.46) can be at least 200ppm or more under the presence of organic matter including disinfection of hands and the like. The coronavirus may be SARS coronavirus (SARS-CoV), MERS coronavirus (MERS-CoV), or 2019 novel coronavirus (SARS-CoV-2).SELECTED DRAWING: None

The present invention discloses a wood-based electrolyte, a preparation method and an application thereof. The preparation method of the wood-based electrolyte of the present invention comprises the following steps: 1) immersing wood in a sodium chlorite solution for delignification treatment to obtain delignified wood; 2) immersing the delignified wood in a dopamine solution for modification treatment to obtain modified wood; 3) immersing the modified wood in an electrolyte solution made of a reversible phase transition polymer and an inorganic salt and water to perform vacuum-assisted impregnation treatment to obtain a wood-based electrolyte. The wood-based electrolyte of the present invention has good ionic conductivity, sensitive temperature responsiveness and excellent flame retardancy, and its thermal response in the direction parallel to and perpendicular to the wood pores is anisotropic, and has broad application prospects in the fields of overheating self-protection supercapacitors, temperature sensing and fire warning.

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

The present invention provides a method for preparing photochromic transparent wood with high sensitivity to sunlight; we applied a new and simple synthesis method, which is based on removing light-absorbing lignin from natural wood. First, a sheet-shaped wood sample with uniform thickness is pretreated, and then the lignin is removed by treatment with sodium chlorite solution and glacial acetic acid. Then, it is ultrasonically treated with distilled water until neutral to obtain a wood sample with the lignin component removed; the sample is dehydrated by ultrasonic solvent replacement using absolute ethanol, isopropyl acetate, and propylene oxide to further obtain a dehydrated wood sample with the lignin component removed; then, we mix a sunlight-color-changing material (OP), prepolymerized methyl methacrylate (PMMA), and polyacrylic acid (PDESP) and directly incorporate them into the delignified wood, and finally cure and polymerize. The present invention has developed for the first time a photochromic transparent wood with high sensitivity to sunlight. The obtained reversible photochromic transparent wood can change from colorless to red rapidly under sunlight in only 1.5 seconds, and can change from red to colorless rapidly in the dark or under visible light in only 2 seconds.

The invention discloses a method for preparing a high-concentration chlorine dioxide solution without a catalyst, relates to the technical field of disinfection, and compared with a conventional method, the stability and the purity of the generated chlorine dioxide solution are improved. The method comprises the step of reacting a sodium chlorite solution with potassium persulfate to generate chlorine dioxide. According to the present invention, the prepared sodium chlorite solution and the potassium persulfate are subjected to the light-shielding reaction in the reactor, such that the sufficient reaction of the sodium chlorite solution and the potassium persulfate is definitely ensured, the efficient chlorine dioxide preparation is achieved, no additional buffer agent is added so as to prepare the aqueous phase chlorine dioxide solution, and the long-term stable storage can be achieved.

The invention discloses a waste-acid-free sodium chlorite production process in the technical field of green preparation of inorganic chemical materials, and the process adopts a novel multistage pore channel-bifunctional site composite modified material, and the material is prepared through a four-stage gradient process of mesoporous silicon substrate synthesis, metal oxide loading, amino functional group modification and confinement calcination. The catalyst has the functions of catalytic reaction, acid impurity adsorption and solid-liquid separation. Sodium chlorate, methanol and sulfuric acid are used as raw materials, the raw materials are prepared into a solution, the solution reacts with the modified material in a reaction kettle, and the temperature is controlled to be 60-62 DEG C for reaction; cooling to separate solid and liquid after reaction, washing and drying a filter cake, and recovering the material; separating the filtrate through a nanofiltration membrane to obtain a high-purity sodium chlorite solution, evaporating and crystallizing trapped fluid to recover sodium sulfate, concentrating sulfuric acid for recycling, and crystallizing and drying penetrating fluid to obtain sodium chlorite crystals. The process has the advantages of no waste acid discharge, short reaction time, high efficiency, product purity reaching the superior product standard, recyclable materials and environmental friendliness.

The invention discloses a salt-inhibiting and scale-inhibiting agent, a preparation method and application in a flue gas denitrification process. The salt-inhibiting and scale-inhibiting agent comprises a citric acid aqueous solution, a sulfonate aqueous solution, sulfate salt and polycarboxylic acid and / or salt thereof. The preparation method comprises the following steps: filling a citric acid aqueous solution, a sulfonate aqueous solution, a sulfate salt solution and polycarboxylic acid and / or a salt solution thereof into a normal-pressure reaction kettle according to a volume ratio, and stirring for reaction. The salt-inhibiting and scale-inhibiting agent cooperates with a denitration agent sodium chlorite solution to be applied to a denitration process of a high-temperature denitration flue gas pipeline. The salt-inhibiting and scale-inhibiting agent is applied to a high-temperature flue gas denitration process, so that mixed salt crystal blocks generated after a flue gas denitration reaction are in a highly loose state, and blockage of a flue gas pipeline is avoided; meanwhile, the denitration capability of the adopted denitration agent sodium chlorite solution can be improved.

To provide a method for producing a chlorous acid aqueous solution using a product obtained by electrolyzing a salt as a raw material.SOLUTION: The present invention provides a method for producing a chlorous acid aqueous solution using a salt as a raw material. The present invention provides a method for producing a chlorous acid aqueous solution, comprising the steps of: 1) electrolyzing a salt to obtain a chlorate or an aqueous solution thereof; and 2) reducing the chlorate or the aqueous solution thereof to produce an aqueous solution containing chlorous acid. The method for producing the chlorous acid aqueous solution includes a step of mixing any single substance or two or more single substances of an inorganic acid or an inorganic acid salt, and then mixing any single substance or two or more single substances of an inorganic acid, an inorganic acid salt, an organic acid, or an organic acid salt.SELECTED DRAWING: None

The invention relates to the field of functional materials, in particular to a preparation method and application of a kapok-based porous material with a radiation cooling function. According to the method, natural kapok short fibers are subjected to constant-temperature alkali treatment to peel off wax on the surface layer, a delignification reaction is carried out with an acidic sodium chlorite solution, and the kapok-based porous material with the radiation cooling function is obtained. And the coarse reticular cellulose structure in the material is thoroughly exposed. The treated active fibers and nano cellulose are subjected to high-strength blending in a water phase, nano fibrils are guided to deeply penetrate into gaps of a micron-sized kapok skeleton, and a tightly-meshed composite system is constructed. And dropwise adding an organosiloxane reagent into the acidic liquid phase to complete surface hydrophobic modification, and carrying out controlled low-temperature setting and vacuum freezing sublimation dehydration to form the three-dimensional base material containing a micro-nano dual-pore network. The material can effectively reflect sunlight and emit heat radiation through an atmosphere window, zero-energy-consumption passive radiation cooling is achieved, and meanwhile the excellent heat insulation performance is achieved.

The present invention provides a chlorine dioxide generator that can reduce the amount of components used. [Solution] In the chlorine dioxide generator 1, a sodium chlorite solution 5 and fumed silica 7 were mixed in a container 3 to generate chlorine dioxide.

The invention relates to the field of preparation of nano-crystalline cellulose, and provides a method for preparing nano-crystalline cellulose by using enteromorpha, which comprises the following steps: 1) cleaning enteromorpha, drying and crushing; (2) immersing a product obtained in the step (1) into a sodium hydroxide solution, magnetically stirring for 4 hours at 55 DEG C, and then centrifugally washing; (3) immersing the product obtained in the step (2) into a sodium chlorite solution, magnetically stirring for 4 hours at 90 DEG C, and then centrifugally washing and drying; 4) dispersing the product obtained in the step 3) in sulfuric acid with the mass fraction of 5%, adding potassium permanganate and sodium hydrogen sulfite while stirring, and then performing high-pressure microjet treatment; 5, hydrogen peroxide is added into the solution obtained in the step 4 until the solution becomes white, then centrifugal washing is conducted, precipitates are taken and dispersed in water, the precipitates are placed in a dialysis bag to be dialyzed, and the nanocellulose aqueous solution is obtained.The method is easy to operate and has the advantages of being environmentally friendly, low in energy consumption and short in time.

The application relates to the field of chlorine dioxide disinfecting materials, in particular to a preparation method of a device loaded with acid-alkali-resistant long-acting slow-release binary solid chlorine dioxide. The preparation of an acid-alkali-resistant long-acting slow-release chlorine dioxide solid preparation is as follows: cassava starch is used as a skeleton, polyvinyl alcohol is used as a soft segment, and quaternary ammonium carboxymethyl cellulose and chitin are added for modification, so that the acid resistance and alkali resistance of the hydrogel are improved; then sodium bicarbonate is introduced to increase the specific surface area of the hydrogel. The device is assembled by adsorbing sodium chlorite solution and citric acid solution through the three-dimensional network structure of the hydrogel, and long-term release of chlorine dioxide is realized through the coordination among raw materials, so that the shortcomings of solid chlorine dioxide, such as poor acid resistance and alkali resistance and poor mechanical property, are solved.

The application discloses a kind of waste-free acid sodium chlorite production process in the field of inorganic chemical materials green preparation technology, process uses new multi-level pore-dual functional site composite modified material, the material is prepared by mesoporous silica base synthesis, metal oxide loading, amino functional group modification and limited calcination four-stage gradient process, with catalytic reaction, adsorption acid impurity and solid-liquid separation function.Employing sodium chlorate, methanol, sulfuric acid as raw material, after the raw material is matched into solution, it is reacted with modified material in reaction kettle, temperature is controlled to 60-62 DEG C reaction;After reaction, temperature is lowered and solid-liquid is separated, filter cake is washed and dried, and then material is recycled;High-purity sodium chlorite solution is obtained by nanofiltration membrane separation of filtrate, sodium sulfate is recovered by evaporation crystallization of intercept liquid and concentrated sulfuric acid is recycled, and sodium chlorite crystal is obtained by crystallization and drying of permeate liquid.The process realizes waste-free acid discharge, reaction time is short, efficiency is high, product purity reaches superior product standard, material can be recycled, and it is environment-friendly.

The present invention provides technology for the long-term preservation of the scientific quality of the chlorine peroxy radical (ClOO·), which is the main active ingredient of chlorous acid water, through the suppression of water molecule vibration. Provided is a method for producing a frozen product of a chlorine peroxy radical solution, the method comprising: (1) preparing a solution containing the chlorine peroxy radical; and (2) freezing the solution containing the chlorine peroxy radical. The method comprises cooling the solution to -20°C or below. Also provided is a frozen product of a chlorine peroxy radical solution produced using the above method.

The utility model discloses a sodium chlorite concentration device which comprises a reaction kettle, a first cavity and a second cavity are formed in the reaction kettle, the second cavity surrounds the first cavity, a vacuumizing valve is arranged at the top of the first cavity, the upper portion of the first cavity is connected with one end of an air guide pipe, and the other end of the air guide pipe communicates with a liquid storage cavity. The gas guide pipe is coated with a condensation assembly, a heating rod is arranged in the second cavity, a temperature sensor is installed in the second cavity, the temperature sensor is electrically connected with the microcontroller, and the microcontroller is electrically connected with a control switch of the heating rod; heat is transferred by heating water, so that heating equipment is not in direct contact with a sodium chlorite solution, the risk of equipment corrosion is reduced, the contact area between the hot water and the first cavity is increased, the solution in the first cavity is heated uniformly, local overheating is avoided, the water temperature is adjusted through the microcontroller, and the evaporation temperature of the solution is controlled; the concentration efficiency of the sodium chlorite solution is improved.

The present invention is entitled "A Continuous Flow Preparation Method for Tegoragen Intermediates", belonging to the field of chemical synthesis technology. The technical problem to be solved is that the existing preparation methods have safety risks, long reaction time and low yield. The key points of the technical solution are as follows: The continuous flow preparation method of the present invention is as follows: (1) 3,5-difluorophenol and 3-chloropropanol are dissolved in organic solvents to form solutions, and then reacted with organic amines in a microreactor. After the reaction is completed, the material is discharged and the organic layer 1 is separated; (2) 2,2,6,6-tetramethylpiperidine oxide is added to the organic layer 1, and then reacted with sodium hypochlorite solution and sodium chlorite solution in a microreactor for oxidation reaction. After the reaction is completed, the material is discharged and the organic layer 2 is separated; (3) The organic layer 2 is then reacted with concentrated sulfuric acid in a microreactor. After the reaction is completed, the material is washed with water and the organic layer 3 is separated. After concentration and recrystallization, the tegoragen intermediate 5,7-difluorobenzodihydropyran-4-one is obtained.

The invention discloses a preparation method of a chlorine dioxide aqueous solution with stable concentration, which comprises the following steps: Step 1: Add sodium chlorate solution and sodium chlorite solution into a reaction kettle, mix them evenly to obtain a mixed solution A; Step 2: Add a composite reducing agent and a catalyst into the reaction kettle, mix them evenly to obtain a mixed solution B; Step 3: Slowly add concentrated sulfuric acid into the reaction kettle, start the vacuum system, and control the temperature of the reaction kettle. The reaction starts in the reaction kettle to generate chlorine dioxide gas; Step 4: Pass the chlorine dioxide gas through a condenser, and after passing through a separator, absorb it in a three-stage absorption tower to obtain a chlorine dioxide aqueous solution with stable concentration. The chlorine dioxide aqueous solution prepared by using the invention has high purity and stable concentration, and can still maintain the stability of the chlorine dioxide concentration at a high temperature of 40°C.

Provided is a method for producing chlorous acid water using a salt as a raw material. The present invention provides a method for producing chlorous acid water, comprising: 1) a step for electrolyzing a salt to obtain an aqueous chlorate solution; 2) a step for generating a first reaction gas containing chlorine and chlorous acid using a partial acid, and capturing the first reaction gas in an aqueous solution containing chlorous acid using a neutralizing agent; and 3) a step for obtaining an aqueous solution containing chlorous acid by generating a second reaction gas containing chlorous acid and chlorine dioxide using the remaining acid and hydrogen peroxide after confirming that the first reaction gas is not generated, and capturing the second reaction gas in the aqueous solution containing chlorous acid using a neutralizing agent, the step involves reducing the aqueous chlorate solution.

An efficient cyclic process and related method for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions in open recirculating systems under alkaline pH conditions. The cyclic process provides enhanced inactivation of microbiological organisms while significantly reducing cost and improving safety.

The present invention provides a composition having an excellent dissolving ability for a transition metal-containing substance and a method for treating a substrate. The composition according to an embodiment of the present invention contains at least one oxohalogen acid compound selected from the group consisting of hypochlorous acid, chlorous acid, chloric acid, bromic acid, and salts thereof and a compound represented by Formula (1), in which a content of the compound represented by Formula (1) is 1.0% to 25.0% by mass with respect to a total mass of the composition.

A flexible and smart wood with responsive function, an actuator and a preparation method of the flexible and smart wood with responsive function are provided. The preparation method includes the following steps: removing lignin from wood by using sodium chlorite solution, removing hemicellulose through alkali treatment, compounding a wood chip with an azobenzene compound by using a negative pressure method, and then densifying to form a wood film. According to the preparation method, the flexible and smart wood is successfully prepared, and the actuator made from the flexible and smart wood takes stimulation (such as illumination) given by an external environment as a power source, so that the actuator has an advantage of no secondary energy consumption.

A system and method for controlling the accelerated remediation of the water of an aquatic facility using at least one sanitizer sensor, a pH sensor, a temperature sensor and a chlorine dioxide sensor all interfaced with a programmable controller that is programmed to implement an accelerated remediation cycle and configured to calculate a Ct value of the water chemical feed system. The programmable controller activates a chemical feed system to supply an acid, an oxidizer and a chlorite ion donor to a conduit to form chlorine dioxide that is supplied to the water until a desire Ct value is reached.

The invention relates to the field of bamboo resource utilization, and discloses a method for preparing cellulose nanofibers from fine components of bamboo pulp, the cellulose nanofibers and application of the cellulose nanofibers. The preparation method comprises the following steps: adding fine components of bamboo pulp into an acidic sodium chlorite solution for pretreatment to obtain a fiber raw material; adding the fiber raw material into anhydride for reaction; and washing and dispersing residues obtained by the reaction, and then carrying out mechanical treatment to obtain the cellulose nanofibers. The method provided by the invention is high in production efficiency and relatively low in energy consumption, the length-diameter ratio of the prepared cellulose nanofiber can reach 800-2000, and the problems that resources such as fine fibers and parenchyma cells are wasted after chemical pulping of bamboos, and the prepared cellulose nanofiber is poor in dispersity and stability and the like are solved.

The objective is to provide a method for producing an aqueous solution containing chlorous acid that is safe for human use, easy to handle, and generates little chlorine dioxide, for use as a disinfectant in pre-treatment for food processing. [Solution] A method for producing an aqueous solution containing chlorous acid, which is safe for the human body, easy to handle, and generates little chlorine dioxide, for use as a pre-treatment disinfectant for food processing. Chloric acid is generated by adding sulfuric acid or an aqueous solution thereof in an amount and concentration that can maintain the pH value of the aqueous solution between 2.3 and 3.4 to an aqueous sodium chlorate solution and reacting the two, and then adding an amount of hydrogen peroxide equal to or greater than the amount required for the reduction reaction to the chloric acid to produce chlorous acid.

The invention discloses a reversible thermochromic energy storage floor and a preparation method thereof, and belongs to the technical field of building material processing, and the preparation method comprises the following steps: step 1, preparing a reversible thermochromic dye: ultrasonically mixing fatty alcohol, alkane, a leuco agent and a color developing agent according to a certain mass ratio to obtain the reversible thermochromic dye; wherein the fatty alcohol and the alkane form a composite solvent; secondly, the oak wood is pretreated, specifically, the oak wood is sequentially placed in a sodium chlorite solution and an ethanol solution to be soaked, and the treated oak wood is obtained; and thirdly, the treated oak wood is sequentially placed in water and the reversible thermochromic dye to be subjected to vacuum pumping treatment, standing is conducted, the steps are repeated 2-5 times, and the reversible thermochromic energy storage floor is obtained. The floor prepared by the method has the characteristics of high latent heat value, proper color change temperature, excellent mechanical property and environmental friendliness.