124 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 invention provides a high-performance wood-based metal electric heating material and a preparation method thereof. The wood-based metal electric heating material has excellent electric heating capability and relatively high tensile strength and can be molded and processed. The method comprises the following steps: immersing fibers obtained by dispersing and crushing thin wood chips into a sodium chlorite solution to decompose lignin, cleaning with distilled water, and drying to obtain wood fibers; the preparation method comprises the following steps: blending multi-walled carbon nanotubes and graphene in a mass ratio of (3-5): (4-7), adding 10wt% of the mixture into distilled water, adding 1-3wt% of a dispersant, and performing ultrasonic treatment to obtain carbon nano slurry; wood fibers are soaked in the carbon nano slurry, taken out and dried, then soaked in a silane coupling agent solution, taken out and drained; blending the powdery tin-bismuth alloy and thermoplastic high-molecular polymer powder according to a mass ratio of 1: 8-1: 12 to obtain low-melting-point alloy / polymer mixed powder; and the low-melting-point alloy / polymer mixed powder and wood fibers are blended according to the mass ratio of (1-3): 1, and high-temperature melt extrusion is performed.

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.

Provided herein are methods and compositions for the treatment of ALS using chlorite or a pharmaceutical composition comprising sodium chlorite, for a target ALS patient population. Also provided herein are methods for identifying a target ALS patient population likely to be responsive to treatment with chlorite or a pharmaceutical composition comprising sodium chlorite, the methods including identifying ALS patients with elevated plasma C-reactive protein (CRP) levels and / or patients age 40-65, sporadic ALS pathology, or combinations thereof.

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 provides vinasse dietary fiber with blood fat reducing activity and a preparation method of the vinasse dietary fiber. The vinasse dietary fiber with relatively high purity is obtained by performing alkali soaking, sodium chlorite bleaching, crushing and drying on the vinasse. The prepared vinasse dietary fiber can effectively improve hyperlipidemia of obese diabetes model mice, reduce triglyceride and total cholesterol levels of serum and liver and improve liver injury, and can be applied to preparation of functional food, health care products, medicines and feeds with the blood glucose reducing effect.

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.

A storage tank for sodium chlorite production relates to the technical field of storage devices and comprises a tank body, a movable base is arranged below the tank body, a plurality of vertically-arranged screws are arranged on the side wall of the tank body in a surrounding manner, vertically-arranged driving cylinders are rotatably mounted on the movable base corresponding to the screws, and the screws are in threaded connection with the inner walls of the driving cylinders. A linkage mechanism for synchronously driving the driving cylinders to rotate is arranged on the lower surface of the movable base, a discharging flange is arranged at the lower end of the tank body, a discharging cylinder is detachably connected to the discharging flange, and a corrugated telescopic pipe is connected to the discharging cylinder in the transverse direction. The problems that in the prior art, when the height of a sodium chlorite storage tank is adjusted, an adjusting structure is complex, large space is occupied, and material receiving work of material receiving equipment below is affected are solved; and when an existing sodium chlorite storage tank feeds materials into material receiving equipment below, the angle, facing the material receiving equipment, of the sodium chlorite storage tank needs to be continuously adjusted, so that the discharging efficiency of the storage tank is reduced.

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.

The present invention relates to the technical field of veterinary medicine, and specifically discloses a composition for treating cow mastitis and a preparation method thereof. The composition includes: 0.5 part-2 parts of a composite sodium chlorite effervescent tablet, 1.2 parts-1.5 parts of puerarin, 1.8 parts-2.0 parts of a chitosan-derived quaternary ammonium salt, 1 part-5 parts of modified nano zinc oxide, 2 parts-6 parts of magnesium-aluminum hydrotalcite, 1.6 parts-3 parts of an antibacterial agent, 5 parts-10 parts of a film former, 2 parts-4 parts of a plasticizer, 3 parts-7 parts of a surfactant, 1 part-2 parts of a thickener, and 550 parts-650 parts of distilled water. The composition provided by the present invention can fundamentally treat and prevent cow mastitis under the synergistic effect of each component, with a cure rate of more than 90%, and will not cause drug residues, thereby avoiding the generation of drug residues and bacterial resistance problems in cow's milk. The composition is suitable for promotion in animal husbandry and has broad application prospects.

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.

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.

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 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.

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 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 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 present invention belongs to the technical field of papermaking, and particularly relates to a method for improving the printing color fidelity of decorative base paper by using bamboo pulp nanocellulose, which comprises the steps of: S1, crushing and drying bamboo slices to make bamboo powder; S2, obtaining holocellulose fibers after treating the bamboo powder with extraction of lignin, sodium chlorite acid solution and KOH solution; S3, neutralizing the alkali in the holocellulose fibers with hydrochloric acid and then washing with water; S4, diluting the holocellulose fibers with water to a suspension with a concentration of 0.5-1.5%, and then performing high-speed dispersion to obtain a pretreated cellulose fiber suspension; S5, performing homogenization treatment on the pretreated cellulose fiber suspension, and then concentrating to obtain a nanocellulose suspension; S6, compounding the nanocellulose suspension with cationic starch to obtain a coating solution, and coating the decorative base paper to obtain a decorative base paper coated with bamboo pulp nanocellulose. The method of the present invention can effectively improve the printing color fidelity of the decorative base paper and improve the quality and aesthetics of the decorative base paper.

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.