91 results about "Sodium chlorite" patented technology

The invention relates to the technical field of wood manufacturing, in particular to a preparation method of a multifunctional phase-change transparent wood-based composite material, which comprises the following steps: delignification of wood through acidic sodium chlorite, modification with silica sol to obtain a porous template, dipping in a PEG / MMA / AIBN / acetone mixed solution, and hot press molding to obtain a phase-change transparent base material; and finally, coating a PDMS solution containing cesium tungsten bronze and strontium aluminate, and performing low-temperature drying twice to obtain the multifunctional composite material. Silica sol pretreatment is combined with a PEG / MMA impregnation and compression technology, the preparation process is simple and easy to implement, leakage of the phase change material can be effectively prevented, meanwhile, the stability and performance consistency of the composite material are improved, the material is suitable for large-scale production, meanwhile, cesium tungsten bronze and strontium aluminate are introduced, the material is endowed with hydrophobicity, light-emitting characteristics and heat shielding capacity, and the material is suitable for large-scale production. And the intelligent building has the functions of photo-thermal management, self-cleaning and decoration, so that diversified application requirements are met.

The invention discloses porous chlorine dioxide slow-release preservative paper and a preparation method thereof.The porous chlorine dioxide slow-release preservative paper comprises a paper base, a porous carrier is fixed to the paper base through oxidized starch glue, and sodium chlorite, an activating agent and a stabilizing agent are loaded on the porous carrier; the porous carrier is one of aluminum oxide, titanium oxide, cobalt oxide, zinc oxide, copper oxide, iron oxide, cerium oxide, zirconium oxide, nickel oxide, manganese oxide, praseodymium oxide and lanthanum oxide with a porous structure. The slow release of chlorine dioxide can be stably and effectively realized, the release period of chlorine dioxide is prolonged, and long-acting stable sterilization and disinfection effects are realized.

The application discloses porous chlorine dioxide slow-release preservative paper and a preparation method thereof. The paper comprises a paper base, a porous carrier is fixed on the paper base through oxidized starch glue, sodium chlorite, an activator and a stabilizer are loaded on the porous carrier, and the porous carrier is one of porous structures of aluminum oxide, titanium oxide, cobalt oxide, zinc oxide, copper oxide, iron oxide, cerium oxide, zirconium oxide, nickel oxide, manganese oxide, praseodymium oxide and lanthanum oxide. The application can stably and effectively realize slow release of chlorine dioxide, prolong the release period of chlorine dioxide, and realize long-acting and stable sterilization and disinfection.

The invention relates to a chlorine dioxide sustained-release ball, which relates to the technical field of environmental protection and disinfection, and comprises an activated alumina ball and an inorganic porous layer from inside to outside, wherein the activated aluminum oxide ball is loaded with sodium chlorite and a porous film, and the inorganic porous layer is loaded with the porous film. The chlorine dioxide sustained-release ball disclosed by the invention realizes the goals of high load, long period, constant-speed release and stable physical form.

The described invention is a disinfectant that has a bactericidal and fungicidal effect. Optimally, the agent is diluted more than 70 times before use, thereby achieving pH neutrality of the solution. The agent is also effective, bactericidal and fungicidal, and when diluting the final formulation up to 200 times. The improvement of the disinfectant is based on the presence of the active substance didecyldimethylammonium chloride. The agent also contains sodium chlorite. In this invention, polyethylene glycol, in addition to the function of a polymer carrier, also has the function of a stabilizer of the solution of the active substance, a non-ionic surfactant.

The invention relates to the technical field of preparation of small molecule compound medicines, in particular to a preparation method of (S)-flurbiprofen. The method comprises the following steps: dropwise adding a tetrahydrofuran solution of 4-bromo-2-fluorobiphenyl into a mixture of tetrahydrofuran and magnesium, and reacting to generate a Grignard reagent; mixing tetrahydrofuran, (S)-vinyl chloride oxide and ferric acetylacetonate, dropwise adding the Grignard reagent, performing acidolysis ring opening, and performing methylation with methyl iodide and magnesium iodide to obtain an alpha-hydroxyl aromatic carboxylic acid derivative; and reacting with sodium chlorite, nitroxide free radicals and acetonitrile, and oxidizing to obtain the (S)-flurbiprofen. By introducing a chiral induction unit, effective transmission of chiral information is realized in a coupling stage, an original chiral center is not destroyed in a subsequent reaction, and a product is ensured to have a highly consistent configuration. According to the scheme, the technical problem that a method capable of remarkably improving the optical purity and yield of (S)-flurbiprofen is lacked in the prior art can be solved, and the method has good environmental friendliness and industrial application prospects.

The preparation method comprises the following steps: dissolving titanium potassium oxalate in water, sequentially adding ammonium sulfate and sodium chlorite, uniformly stirring to obtain a homogeneous mixed solution, and dropwise adding concentrated sulfuric acid to obtain a precursor solution; and carrying out hydrothermal reaction on the precursor solution, alternately washing the obtained precipitate with water and ethanol, and drying to obtain the efficient titanium dioxide photocatalyst. By accurately regulating and controlling the use amount of sodium chlorite, accurate regulation and control on the crystal phase composition of the product are successfully realized, and the prepared powder is in a blocky particle shape and has excellent monodispersity. According to the preparation process, subsequent high-temperature calcination or complex modification steps are not needed, energy consumption is reduced, doped element loss is avoided, the preparation process is simple and economical, and meanwhile the photocatalytic performance of titanium dioxide is remarkably improved. Compared with a commercial P25 photocatalyst, the double-phase titanium dioxide photocatalyst prepared by the invention has efficient degradation performance.

The invention relates to the technical field of brine sewage treatment, and discloses an inferior brine refining preparation method based on oxidation-adsorption coupling, which comprises the following steps: adding an efficient CuO / Al2O3 catalyst according to 0.5-1.5% of the volume of brine under the accurate control of the pH value of 2.5-3.0, and adding sodium chlorite according to the molar ratio of 3: 1-5: 1 to realize the specific deep oxidation of I <->; and carrying out targeted enrichment on the generated I2 by using a high-capacity adsorbent. According to the combined process, the iodine concentration of effluent is stably lower than 0.1 mg / L, and the catalyst can be recycled for more than or equal to 50 times. Comparison data proves that the iodine residue is up to 0.85 mg / L when no catalyst exists, and iodine removal is not thorough due to the fact that the oxidizing agent is insufficient. According to the efficient iodine removal method, the deposition of iodine in the ionic membrane electrolytic bath is fundamentally avoided, the expensive ionic membrane is effectively protected, the service life of the ionic membrane is prolonged by more than 30%, the energy consumption of the system is reduced by about 15%, and the brine recycling efficiency and the economic benefit are remarkably improved.

The invention belongs to the technical field of sterilization and disinfection materials, and particularly relates to a wrapped slow-release chlorine composition and a preparation method and application thereof.The composition is of a unique dual-wrapping structure, the core is a mixture of sodium chlorite and a stabilizer, the composition is primarily wrapped with hydrophobic modified chitosan microspheres and then combined with citric acid, and the wrapped slow-release chlorine composition is prepared. And finally, the metal coordinated polyethylene glycol hydrogel is used for outer layer coating to form a complete slow-release system. The preparation method comprises the following steps: firstly, preparing a microsphere carrier through hydrophobic modification and cross-linking curing of chitosan and lauric aldehyde; then, polyethylene glycol amine and a derivative of pyridinedicarbonyl chloride are subjected to cobalt ion coordination to form hydrogel; finally, the chlorine source components are combined and formed through adsorption, mixing and coating processes in sequence. The composition can effectively control the release rate of the chlorine component, has long-acting and stable sterilization and disinfection effects, and can be widely applied to the fields of water treatment, food preservation, medical instrument disinfection, agricultural disease control and the like.

The invention discloses a preparation method of light-permeable phase-change bamboo wood, and relates to the technical field of bamboo wood treatment. Lignin in alkali-treated bamboo wood is removed by adopting an acidic sodium chlorite system; according to an acidic sodium chlorite method, lignin is selectively removed while the complete structure of the bamboo fibers is kept, the preparation method is simple in process step, the used acidic sodium chlorite delignification system is combined with structural alkali treatment and vacuum impregnation, efficient delignification and high loading of the phase-change material are achieved, and meanwhile the phase-change effect is improved. The process operability and the final performance of the material are both considered, the prepared phase change bamboo material has light transmittance and a high enthalpy value, the phase change enthalpy is larger than 80 J / g, and the phase change bamboo material can be used as a light-transmitting window with a heat storage function, an indoor partition, a decoration panel and a photo-thermal management furniture assembly.

The application discloses a preparation method of a deodorant product, and comprises the following steps: step one, preparing a cross-linked hydroxypropyl methyl cellulose and chitosan water solution: hydroxypropyl methyl cellulose and chitosan are dispersed in water in a mass ratio of 1:1 to form a uniform and stable water dispersion a; peracetic acid and a copper ion catalyst are added to the water solution a, and the water solution a is heated and treated at 80-100 DEG C for 3-5 hours to obtain a water solution b; glucose is added to the water solution b to remove excess peracetic acid, and the water solution b is heated and treated for 1 hour again; and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling; step two, preparing a stable hydrogen peroxide solution: urea is added to a hydrogen peroxide solution, and the solution is stirred at 40-50 DEG C for 1 hour; cyclodextrin is added to the above solution, and the solution is continuously stirred at 40-50 DEG C for 1 hour; and the stable hydrogen peroxide solution is obtained after cooling to room temperature; and step three, preparing the deodorant product: the cross-linked hydroxypropyl methyl cellulose and chitosan water solution obtained in step one and the stable hydrogen peroxide solution obtained in step two are mixed in a ratio of 1:5 to 1:1, and sodium chlorite is added, so that the deodorant product is obtained after stirring.

The application relates to the technical field of processing and preparation of wood-based functional materials, and particularly discloses a wood-based friction material with a service life self-monitoring function and a preparation method thereof, which comprises the following steps: dispersing poplar powder in a co-solvent formed by mixing choline chloride and dihydroxide oxalic acid to obtain a mixed liquid, diluting and washing with water to obtain filter residue A; dispersing the filter residue A in distilled water I, adding sodium chlorite and acetic acid, stirring, and washing with water to obtain filter residue B; dispersing the filter residue B in distilled water II, adding phenolphthalein, and crushing to obtain a dispersion liquid; adding sodium chloride, solid Tris and tannic acid into the dispersion liquid, stirring, and washing with water to obtain filter residue C; dispersing the filter residue C in distilled water III, adding polyvinyl alcohol, stirring, pouring into a mold, and drying; dispersing the filter residue A in distilled water, adding sodium hydroxide and polyvinyl alcohol, stirring to obtain a mixed base liquid, continuously pouring into the mold, and drying to obtain the wood-based friction material. The friction material has the service life self-monitoring function, and the method is simple and low in cost.

This invention discloses a method for preparing and applying a chitosan-nanofibrillar-based smart indicator membrane loaded with anthocyanins and alizarin. The method includes the following steps: mixing beet powder with hydrochloric acid, washing with water until neutral, and drying; adding sodium hydroxide solution, mixing and reacting, washing with water until neutral, and drying; adding sodium chlorite solution, mixing, adjusting the pH to 3-3.5, reacting, and washing with water until neutral to obtain beet fiber; adding water, homogenizing under ultra-high pressure to obtain a beet nano-suspension; adding the beet nano-suspension to a chitosan-acetic acid solution and stirring, then adding glycerol; adding pigments, mixing, and obtaining a membrane solution; ultrasonically degassing, and drying to form a membrane. This membrane, as a food preservation indicator membrane, possesses both the characteristics and functions of food preservation and indicating food freshness; using beet nanofibers as a supplementary material improves the mechanical properties of the chitosan membrane; the addition of alizarin and anthocyanin mixed pigments enriches the color changes of the indicator membrane and improves its stability.

A method for preparing purified polyhydroxyalkanoate of the present invention may lower the b* value of a final product more than the conventional value by means of a decolorization step using two types of oxidizing agents sequentially. In addition, in the present invention, by using sodium chlorite (NaClO2), as a primary oxidizing agent, the effect of improving color is significant, and there is almost no decrease in molecular weight.

The invention provides N-atom-doped hard carbon capable of being used as a sodium-ion battery negative electrode material and a preparation method of the N-atom-doped hard carbon, and belongs to the technical field of biomass carbon and electrochemical energy storage. The preparation method comprises the following steps: washing, drying, crushing and powdering waste biomass shells, pretreating the powder by using sodium chlorite and acetic acid to obtain a precursor I, washing and drying the precursor I, mixing the precursor I with a carboxyl-containing nitrogen source under the action of a cross-linking agent, and drying and grinding to obtain a precursor II; then the precursor II is pre-carbonized in the nitrogen atmosphere and carbonized in the argon atmosphere, and the N atom doped hard carbon is obtained.The method is simple in process, low in cost, green and efficient, and the obtained material has high specific capacity and excellent rate capability and is suitable for a high-performance sodium ion battery negative electrode.

The invention belongs to the field of fine chemical engineering and special chemicals, and particularly relates to a preparation method of modified cellulose microgel. The preparation method comprises the following steps: (1) mixing bacterial cellulose, TEMPO, sodium dihydrogen phosphate, sodium hypochlorite, sodium chlorite and water to obtain a mixture; (2) sealing the mixture at the room temperature of 25 DEG C, stirring and reacting for 4 hours, and then stirring and reacting for 48 hours at the temperature of 65 DEG C; (3) cooling the product obtained in the step (2) to room temperature to obtain TEMPO oxidized cellulose, and performing high-speed shearing on the TEMPO oxidized cellulose to obtain cellulose microgel; and (4) carrying out hydrophobic modification on the cellulose microgel to obtain the modified cellulose microgel. According to the preparation method, the bacterial cellulose is used as a raw material, and after the bacterial cellulose is subjected to hydrophobic modification, the surface hydrophobicity is improved while good suspension property and pore structure are maintained, so that the storage of the bacterial cellulose microgel in water and the capability of adsorbing volatile material fragrance are realized.

The invention discloses a modified cellulose acetate dialysis membrane and a preparation method thereof.The preparation method comprises the following steps that after a cellulose acetate membrane is hydrolyzed for 1 min, the acetyl part of the cellulose acetate membrane is removed, then the cellulose acetate membrane with the acetyl part removed is subjected to an oxidation reaction, and the cellulose acetate membrane with the acetyl part removed is obtained; a selective oxidation catalyst A and / or a co-catalyst B are / is used in the oxidation reaction process, and an oxidant C is one of sodium hypochlorite, sodium chlorite, calcium hypochlorite, hydrogen peroxide, persulfate or sodium periodate; and then adding chitosan which is subjected to crosslinking modification by dialdehyde cellulose to carry out grafting reaction. According to the method, the grafting effect can be optimal only through the synergistic cooperation of the carboxyl active site amount and the crosslinking degree of the chitosan, and the urea adsorption capacity and the blood compatibility of the cellulose acetate membrane are remarkably improved.

The present application relates to the field of air purification technology, and more particularly to an air purification composition containing Chinese herbal medicine volatile oil, an air purification device and a preparation method. The air purification composition comprises a chlorine dioxide slow-release gel and a Chinese herbal medicine volatile oil slow-release system, wherein the components of the chlorine dioxide slow-release gel comprise an aqueous oxalic acid solution, sodium chlorite, porous nanomaterial, hydroxypropyl methylcellulose K4M and ethyl cellulose, and the Chinese herbal medicine volatile oil slow-release system comprises Chinese herbal medicine volatile oil and a slow-release matrix material. The air purification composition is slowly released by chlorine dioxide and Chinese herbal medicine volatile oil together, has effective and persistent bactericidal action, and can also undergo oxidation-reduction reactions with various organic and inorganic substances in the air to achieve the purpose of decomposing odors and purifying air.

Disclosed herein is a method for preparation of a disinfectant formulation, the method comprising steps of obtaining a chlorine dioxide (CIO2) solution by adding a predetermined quantity of sodium chlorite with a predetermined quantity of sodium bisulfate in a first container filled with water, keeping the first container closed for a predetermined period of time, dissolving a predetermined quantity of peracetic acid (PAA) in water in a second container, adding a predetermined quantity of benzalkonium chloride (BAC) to the solution in the second container, and mixing and stirring the solutions of the first and second container to obtain a disinfectant solution.

The utility model belongs to the technical field of air disinfection equipment, and provides a chlorine dioxide air disinfection device which comprises a reaction box, a chlorine dioxide generating assembly and an air supply part, the chlorine dioxide generating assembly is located in the reaction box, and the air supply part is located at the top of the reaction box and discharges chlorine dioxide in the reaction box. The chlorine dioxide generating assembly comprises a PE bag, a container and absorbent paper, sodium chlorite is adsorbed on the absorbent paper, a hydrochloric acid solution is contained in the container, the hydrochloric acid solution is dropped on the absorbent paper through the container, and the container and the absorbent paper are wrapped and sealed by the PE bag, so that chlorine dioxide gas generated by reaction of sodium chlorite and the hydrochloric acid solution permeates into the reaction box through the PE bag. The chlorine dioxide gas can be conveyed to any place in a room, so that poor disinfection effect caused by non-uniform distribution is avoided, and corrosion of an air supply component caused by attachment of a chlorine dioxide solution is avoided.

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 provides a chlorine dioxide slow-release composition. The chlorine dioxide slow-release composition comprises a component A, a component B and a component C, the component A comprises sodium chlorite, a first high-molecular compound and water; the first high-molecular compound comprises one or more of polyvinyl alcohol, polyethylene glycol and polyacrylamide; the component B comprises organic acid, a second high-molecular compound and water; the second high-molecular compound comprises genipin or sodium alginate; the component C comprises a cross-linking agent and water, and the cross-linking agent is chlorate. In the sustained-release composition provided by the invention, the sodium chlorite is wrapped in the first high-molecular compound capable of forming the hydrogel, and then is mixed with the organic acid, the second high-molecular compound and the cross-linking agent to form a cross-linking product wrapping the organic acid, so that the sodium chlorite and the organic acid react along with degradation of the hydrogel and the cross-linking product; and chlorine dioxide gaseous molecules are slowly and continuously released, so that the antibacterial action period of a coating formed by the composition is prolonged.

The invention discloses a slow-release chlorine dioxide preparation as well as a preparation method and application thereof, and belongs to the technical field of food storage and preservation. The preparation method specifically comprises the following steps: (1) adding soybean protein isolate into water, and magnetically stirring; (2) adding polyethylene glycol 6000, and magnetically stirring; (3) adding sodium chlorite, magnetically stirring, centrifuging and freeze-drying; and (4) uniformly mixing with citric acid, calcium chloride and beta-cyclodextrin, and extruding to form a film. The nano microcapsule preparation with a chlorine dioxide slow release function is prepared based on a nano embedding technology, the preparation can realize slow release of gaseous chlorine dioxide by adjusting the content of moisture in a package, and can play roles in delaying sterilization and bacteriostasis, delaying decay and prolonging the shelf life while better maintaining the food quality; meanwhile, quality deterioration caused by excessive use of chlorine dioxide can be avoided, the application range is wide, and wide market prospects are achieved.

The invention belongs to the technical field of mycelium culture, and particularly relates to a high-water-content mycelium culture medium and a preparation method thereof. In order to solve the technical problems that an existing mycelium culture medium is low in moisture content, cultured mycelia are nonuniform in growth and are easily infected with infectious microbes, the method comprises the following steps: directionally removing lignin from plant straw particles by adopting an alkali treatment method, a hydrogen peroxide method or a sodium chlorite method, and exposing cellulose active sites at the same time; the water absorption and retention performance of the matrix is fundamentally improved, the stable pore structure is maintained, and the cooperation of high water content and sufficient oxygen channels is realized; meanwhile, depending on the optimized matrix microenvironment, the germination rate and growth height of the mycelium are greatly increased, the growth speed is increased, uniform planting of the mycelium is guaranteed, the infectious microbe infection rate is remarkably reduced, the growth rate and biomass distribution uniformity of the mycelium are finally achieved, and large-scale and high-quality development of the mycelium industry is promoted.

The invention provides a method for preparing cellulose from traditional Chinese medicine industrial byproducts and application of the method, the traditional Chinese medicine industrial byproducts are used as raw materials, firstly, an acid solution is used for effectively destroying an anti-degradation barrier of lignocellulose and promoting dissolution of hemicellulose to realize preliminary purification of a fiber product, and then sodium chlorite-alkali liquor treatment is carried out to obtain the cellulose. Lignin and pigment components are deeply removed, so that the color of the extract is changed from light yellow to white, the purity of cellulose is improved to 90%, the best use of materials is realized, the green circular economy concept is met, the preparation operation is simple and convenient, the solvent is environment-friendly, and the method is suitable for industrial application. The cellulose is further subjected to ultrasonic dispersion to obtain a nano cellulose suspension, the nano cellulose suspension is subjected to reduced pressure filtration by adopting a microfiltration membrane, and a hydrogel membrane is formed on the surface of the microfiltration membrane, can be assembled in a vacuum filtration device as a filtration medium, is used for purification treatment of an aqueous solution containing suspended solids, and can purify a polluted water body; a solution which is low in cost and easy to operate is provided for water treatment.

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 present invention provides a method of treating frontotemporal dementia, or a childhood genetic neurodegenerative disease such as Ataxia Telangiectasia (A-T), or neurodegenerative diseases such as Parkinson's disease or neuropsychiatric diseases comprising administering to a subject in need thereof an effective amount of chlorite composition, such as sodium chlorite. The present invention thereby provides a method of modulating the immune system in a subject in need thereof. Described herein are methods of administration and treatment.

The invention belongs to the technical field of functional material preparation, and particularly relates to a loofah sponge fiber intelligent temperature control material preparation method which comprises the following specific steps: loofah sponge fiber pretreatment: performing chemical pretreatment on natural loofah sponge; performing bleaching, lignin removal and pore structure dredging on the loofah sponge by using a sodium chlorite, hydrogen peroxide or choline chloride-organic acid eutectic solvent (DES) system so as to improve the hydrophilicity of fibers and the loading capacity of microcapsules, and drying the treated loofah sponge for later use; the natural loofah sponge fiber is adopted as a loading framework of the microcapsule, the microcapsule is environmentally friendly and biodegradable, a pore structure is matched with microcapsule embedding, and the material compounding efficiency and the structural stability are effectively improved; the microcapsule prepared in the invention adopts a sodium lignin sulfonate and polyurea composite shell layer, has good thermal stability and packaging performance, and effectively overcomes the leakage problem of the phase change material.

A method of disinfecting a body of water comprising the steps of: adding sodium chlorite and / or sodium chlorate to the body of water, and, converting the sodium chlorite and / or sodium chlorate to chlorine dioxide in an electrolytic cell in fluid communication with a water circulation system of the body of water.