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CN-121971990-A - Preparation method and application of potassium permanganate alumina ball air purification filter material

CN121971990ACN 121971990 ACN121971990 ACN 121971990ACN-121971990-A

Abstract

The invention relates to the technical field of air purification, in particular to a preparation method and application of a potassium permanganate alumina ball air purification filter material, wherein the preparation method comprises the following steps of S1, cleaning and drying active alumina balls to obtain pretreated alumina balls; S2, dissolving potassium permanganate in deionized water, adding a stabilizer to prepare a potassium permanganate solution, S3, adding pretreated alumina balls into the potassium permanganate solution to obtain impregnated alumina balls, S4, taking out the impregnated alumina balls, drying to obtain dried alumina balls, S5, soaking the dried alumina balls in an organic acid solution, taking out, leaching, drying to obtain treated alumina balls, and S6, placing the treated alumina balls in a sealed container and aging to obtain the finished product. The potassium permanganate alumina ball air purification filter material prepared by the preparation method has the advantages of uniform potassium permanganate load, firm combination, good stability and high purification efficiency.

Inventors

  • DING WENPING

Assignees

  • 湖南普滤环保技术有限责任公司

Dates

Publication Date
20260505
Application Date
20260326

Claims (10)

  1. 1. The preparation method of the potassium permanganate alumina ball air purification filter material is characterized by comprising the following steps of: S1, placing activated alumina balls in deionized water for ultrasonic cleaning for 10-30min, and then drying for 2-4h at 100-120 ℃ to obtain pretreated alumina balls; s2, dissolving potassium permanganate in deionized water, and adding a stabilizer to prepare a potassium permanganate solution with the mass concentration of 5% -15%; S3, placing the pretreated alumina balls obtained in the step S1 into vacuum impregnation equipment, vacuumizing to-0.08 to-0.1 MPa, keeping for 10-20min, then adding the potassium permanganate solution obtained in the step S2, completely immersing the alumina balls, keeping the vacuum degree unchanged, and impregnating for 1-3h to obtain impregnated alumina balls; s4, taking out the impregnated alumina balls obtained in the step S3, draining off superfluous solution on the surface, placing the alumina balls in microwave drying equipment, and drying for 1-2h at 60-80 ℃ to obtain dried alumina balls; s5, placing the alumina balls dried in the step S4 into an organic acid solution with the concentration of 0.5-2wt% to be soaked for 10-30min, taking out, leaching with deionized water, and then drying at 50-70 ℃ for 30-60min to obtain treated alumina balls; s6, placing the treated alumina balls obtained in the step S5 into a sealed container, and aging for 12-24 hours at 20-30 ℃ to obtain the potassium permanganate alumina ball air purifying filter material.
  2. 2. The method for preparing the potassium permanganate alumina ball air purifying filter material according to claim 1, wherein the stabilizer is a combination of sodium silicate and modified beta-cyclodextrin.
  3. 3. The method for preparing the potassium permanganate alumina ball air purification filter material according to claim 1, wherein the addition amount of the stabilizer is 0.5% -2% of the mass of the potassium permanganate.
  4. 4. The method for preparing the potassium permanganate alumina ball air purification filter material according to claim 2, wherein the method for preparing the modified beta-cyclodextrin comprises the following steps: a1, adding beta-cyclodextrin into a sodium hydroxide solution, and stirring for 1-2 hours at 50-60 ℃ to obtain cyclodextrin activating solution; a2, slowly dripping a rare earth salt solution into the cyclodextrin activating solution obtained in the step A1, regulating the pH value to 5.5-7.0, stirring at a constant temperature of 40-70 ℃ for 2-4 hours, washing with deionized water for 2-3 times after the reaction is finished, and then drying in vacuum at 40-50 ℃ to constant weight to obtain the modified beta-cyclodextrin.
  5. 5. The method for preparing the potassium permanganate alumina ball air purifying filter material according to claim 4, wherein the concentration of the rare earth salt solution is 0.05-0.15mol/L.
  6. 6. The method for preparing the potassium permanganate alumina ball air purifying filter material according to claim 4, wherein the rare earth salt solution is one or more of cerium nitrate solution, lanthanum nitrate solution and cerium chloride solution.
  7. 7. The method for preparing the potassium permanganate alumina ball air purifying filter material according to claim 4, wherein the ratio of the beta-cyclodextrin to the rare earth salt solution is 1g (10-30) ml.
  8. 8. The method for preparing the potassium permanganate alumina ball air purifying filter material according to claim 1, wherein the organic acid solution is one or more selected from citric acid solution, tartaric acid solution and ascorbic acid solution.
  9. 9. Use of the potassium permanganate alumina ball air purifying filter material obtained by the preparation method of any one of claims 1-8 in air purification.
  10. 10. The use according to claim 9, wherein the air cleaning comprises removal of at least one of hydrogen sulfide, sulfur dioxide, formaldehyde, volatile organic compounds from the air.

Description

Preparation method and application of potassium permanganate alumina ball air purification filter material Technical Field The invention relates to the technical field of air purification, in particular to a preparation method and application of a potassium permanganate alumina ball air purification filter material. Background Along with industrial development and popularization of interior decoration, gaseous pollutants such as hydrogen sulfide, formaldehyde, mercaptan, nitrogen oxides and the like existing in scenes such as industrial waste gas, indoor environment and the like have serious threat to human health and ecological environment due to the characteristics of low concentration, high toxicity and strong peculiar smell, and research and development of efficient and stable air purifying filter materials becomes urgent need. The main stream air purification material at present has obvious limitation, the activated carbon only depends on physical adsorption, has low adsorption capacity to polar micromolecular pollutants, is easy to desorb, is easy to secondarily release pollutants after saturation, has strong oxidizing property of pure potassium permanganate, is easy to deliquescence and poor in dispersibility when no carrier is used for supporting, has small contact area with gas, has low purification efficiency and is difficult to realize engineering application, and the common alumina only has physical adsorption capacity, has no chemical oxidation effect, cannot effectively remove malodor and toxic gaseous pollutants and is difficult to meet the actual purification requirement. In order to solve the problems, the composite oxidation type filter material gradually becomes a research hot spot, and the potassium permanganate alumina balls are core products thereof, and realize the synergistic effect of physical adsorption and chemical oxidation by loading the potassium permanganate on a porous active alumina carrier. The active alumina as carrier has the advantages of high specific surface area, large pore volume, high mechanical strength and high heat stability, and may be used in providing sufficient contact interface, and the potassium permanganate as active component may oxidize pollutant into non-toxic low toxicity matter and reduce to solid MnO 2 to avoid secondary pollution. In the prior art, patent CN117718004A discloses a method for loading potassium permanganate by regenerated alumina balls, which comprises the steps of washing deactivated alumina balls and a C 6H8O6 aqueous solution according to a mass ratio of 0.25-2, mixing the washed alumina balls with the C 6H8O6 aqueous solution and an AsO 2 aqueous solution, sealing, performing ultrasonic treatment, drying the ultrasonic treated alumina balls, and reloading potassium permanganate. According to the method, the inactivated alumina pellets are pretreated by using a C 6H8O6 aqueous solution, the pore structure of the alumina pellets can be dredged, pore channels of the alumina pellets are dredged, attached byproducts of elemental sulfur and manganese dioxide are removed, regeneration is achieved, impurities cannot be generated by reaction with the alumina pellets, the AsO 2 solution and the C 6H8O6 aqueous solution are matched with ultrasonic assistance, the attached impurities of the micropore/mesopore pore structure in the alumina pellets are removed, the specific surface area of the alumina pellets is increased, potassium permanganate can be reloaded, finally the regenerated alumina pellets and the potassium permanganate solution are mixed and loaded in an ultrasonic mode, and the use effect of removing acid gas is achieved by loading the potassium permanganate solution on the alumina pellets. However, C 6H8O6 is a strong reducing agent, while potassium permanganate is a strong oxidizing agent, and if ascorbic acid remains in the alumina balls, oxidation-reduction reaction may occur when potassium permanganate is subsequently loaded, resulting in reduction of potassium permanganate and reduction of the load. There is therefore a great need in the marketplace for a high loading of potassium permanganate alumina spheres. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to develop a preparation method of an alumina ball air purification filter material with high potassium permanganate load, uniform load, firm combination, good stability and high purification efficiency. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the invention provides a preparation method of a potassium permanganate alumina ball air purification filter material, which comprises the following steps: S1, placing activated alumina balls in deionized water for ultrasonic cleaning for 10-30min, and then drying for 2-4h at 100-120 ℃ to obtain pretreated alumina balls; s2, dissolving potassium permanganate in deionized water, and adding a stabilizer to prepare a potassium perman