CN114146209A - Solid slow-release air purifying agent and preparation method thereof - Google Patents
Solid slow-release air purifying agent and preparation method thereof Download PDFInfo
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- CN114146209A CN114146209A CN202111411196.XA CN202111411196A CN114146209A CN 114146209 A CN114146209 A CN 114146209A CN 202111411196 A CN202111411196 A CN 202111411196A CN 114146209 A CN114146209 A CN 114146209A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
- A61L9/012—Deodorant compositions characterised by being in a special form, e.g. gels, emulsions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
- A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/108—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
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- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention relates to a solid slow-release air purifying agent and a preparation method thereof, wherein the purifying agent comprises the following raw materials in parts by weight: 1 part of sodium carbonate, 10-12 parts of sodium chlorite, 1 part of sulfate, 70 parts of adsorbent, 8-10 parts of water-absorbing resin, 2 parts of calcium chloride, 2 parts of calcium oxide, 2 parts of sodium dihydrogen phosphate and 2 parts of sodium bicarbonate; the method comprises the following steps: dispersing sodium carbonate, sodium chlorite and sulfate in water, adding adsorbent, drying, mixing the dried solid with water absorbing resin, adding calcium chloride, calcium oxide, sodium dihydrogen phosphate and sodium bicarbonate, mixing and packing to obtain the target product. The rapid deliquescence exothermic component added in the invention can accelerate the start of the sodium chlorite decomposition reaction; the addition of the adsorbent and the water-absorbing resin enables the chlorine dioxide to be released more stably. Compared with the prior art, the air purifying agent can slowly release chlorine dioxide gas, and has the advantages of quick reaction start and long effective service life.
Description
Technical Field
The invention belongs to the technical field of air disinfection, and relates to a solid slow-release air purifying agent and a preparation method thereof.
Background
Air purification, odor removal and germ eradication are problems that are often encountered in life and work. The indoor formaldehyde pollution is serious and the human health is influenced due to the indoor decoration and furniture. The existing main methods for removing formaldehyde and peculiar smell are an adsorption method, a neutralization method by spraying a medicament, a coating sealing method and the like. However, these methods, such as adsorption and neutralization by spraying chemicals, only remove formaldehyde temporarily, and then formaldehyde is emitted from the source.
Chlorine dioxide can oxidize formaldehyde into formic acid to CO2And formaldehyde is removed. N201710727467.X discloses a preparation method of a long-acting slow-release type solid chlorine dioxide air purifying agent, which is prepared by using super absorbent resin prepared by grafting PVP (polyvinylpyrrolidone) on carboxymethyl cellulose and chlorine dioxide solution, and has low slow-release capacity. CN111567552A discloses a slow-release chlorine dioxide air purification gel and a preparation method thereof, wherein the gel is prepared from sodium chlorite, citric acid, sodium chloride, sodium bicarbonate, magnesium sulfate, sodium dihydrogen phosphate, polyethylene glycol and sodium carboxymethylcellulose citrate. CN201711444568.2 discloses a slow-release air purifying agent and a preparation method thereof, wherein the air purifying agent comprises chlorine dioxide, a molecular sieve, a sodium chlorite solution, a stabilizer, an adhesive, hydrogen peroxide, ferric nitrate and the like. These scavengers are slow to start reaction when used and the raw materials are not fully utilized.
Disclosure of Invention
The invention aims to provide a solid slow-release air purifying agent and a preparation method thereof, which aim to solve the problems of unstable release of chlorine dioxide and slow reaction start in the prior art.
The purpose of the invention can be realized by the following technical scheme:
one of the technical schemes of the invention provides a solid slow-release air purifying agent, which comprises the following raw materials in parts by weight: 1 part of sodium carbonate, 10-12 parts of sodium chlorite, 1 part of sulfate, 70 parts of adsorbent, 8-10 parts of water-absorbing resin, 2 parts of calcium chloride, 2 parts of calcium oxide, 2 parts of sodium dihydrogen phosphate and 2 parts of sodium bicarbonate.
Further, the sulfate is sodium sulfate or magnesium sulfate.
Further, the adsorbent is mesoporous silicon or zeolite.
Further, the water-absorbing resin is polyethylene glycol, sodium polyacrylate, polyvinyl alcohol or polyacrylamide.
The second technical scheme of the invention provides a preparation method of the purifying agent, which comprises the following steps:
(1) dispersing sodium carbonate, sodium chlorite and sulfate in water, adding an adsorbent, and drying to obtain a solid A;
(2) and (2) mixing the solid A obtained in the step (1) with water-absorbing resin, adding calcium chloride, calcium oxide, sodium dihydrogen phosphate and sodium bicarbonate, uniformly mixing, and hermetically packaging to obtain the target product.
Further, in the step (1), the mass ratio of the sodium carbonate, the sodium chlorite, the sulfate, the water and the adsorbent is 1: (10-12): 1: 40: 70, optionally 1: 10: 1: 40: 70 or 1: 12: 1: 40: 70.
further, in the step (1), the drying temperature is 50-70 ℃, the drying time is 1-3 hours, the drying temperature can be 60 ℃, and the drying time can be 2 hours.
Chlorine dioxide can oxidize formaldehyde into formic acid to CO2According to the principle, the purifying agent can slowly release chlorine dioxide for a long time and continuously release chlorine dioxide gas for a long time so as to remove indoor formaldehyde, peculiar smell and germs.
In the raw material components, sodium chlorite is decomposed to generate chlorine dioxide, which is a main provider of an oxidant; sodium carbonate and sulfate are used for protecting sodium chlorite from decomposition in the transportation and storage processes; the adsorbent (mesoporous silicon or zeolite) has a large number of pore channels and gaps and is an adsorption carrier of sodium chlorite; the water-absorbing resin is converted into a gel state after absorbing moisture in the air, and plays a certain limiting role in the release of chlorine dioxide, thereby achieving the purpose of slow release; the calcium chloride and the calcium oxide are used for absorbing moisture in the air, and generate chemical reaction to generate heat, so that the product can be heated by 5-10 ℃ by self-heating, the decomposition reaction of the sodium chlorite can be quickly started to generate chlorine dioxide, and the chlorine dioxide is stably and slowly released; the sodium dihydrogen phosphate and the sodium bicarbonate release hydrogen ions when meeting water, and can promote the decomposition of sodium chlorite to generate chlorine dioxide. The calcium chloride and the calcium oxide absorb moisture and simultaneously emit heat, so that the release of hydrogen ions of sodium dihydrogen phosphate and sodium bicarbonate is accelerated, the decomposition reaction of sodium chlorite is accelerated, and chlorine dioxide is generated.
The purifying agent of the invention decomposes sodium chlorite to generate a large amount of chlorine dioxide, which is continuously released into the environment through the pore canal of the adsorbent to oxidize and degrade formaldehyde, virus and other organic pollutants in the air; the chlorine dioxide is limited by the pore canal of the adsorbent in the diffusion process, and the water-absorbing resin absorbs the moisture in the air and is converted into a gel state, and the gel state has certain barrier effect on the release of the chlorine dioxide, so that the chlorine dioxide is slowly released.
According to the invention, a proper amount of quick deliquescence exothermic components are added into the raw materials to accelerate the start of a sodium chlorite decomposition reaction; the pore structure of the adsorbent and the water-absorbing resin are converted into a gel state after absorbing water, so that the chlorine dioxide is released more stably.
The present invention sets a certain range for the addition amount of sodium chlorite and water-absorbent resin. If the addition amount of sodium chlorite is too low, the generation amount of chlorine dioxide is low, and the effective action maintaining time of the purifying agent is short; if the addition amount of sodium chlorite is too high, the concentration of chlorine dioxide is high, and the stimulation effect on human bodies can be generated. If the addition amount of the water-absorbing resin is too low, the gel amount is insufficient, and the sustained-release duration is short; if the addition amount of the water-absorbent resin is too high, the slow release rate is slow, and the purification effect is poor.
Compared with the prior art, the invention has the following advantages:
(1) the air purifying agent is safe, low in price and environment-friendly;
(2) the air purifying agent can slowly release chlorine dioxide gas, has long effective service life, controllable chlorine dioxide release flux and stable product performance;
(3) the air purifying agent has simple preparation process and is expected to be popularized and applied.
Detailed Description
The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following examples, unless otherwise specified, all the conventional commercially available raw materials or conventional processing techniques in the art are indicated.
In the following examples, the process of measuring the slow release rate of the scavenger is specifically as follows:
the prepared purifying agent is placed in a sealed container, an open bottle with the same weight of moisture is placed in the sealed container, sodium chlorite starts to decompose after the purifying agent absorbs the moisture, the released chlorine dioxide gas is collected by using a liquid-sealed gas absorber, and then the rate of the purifying agent for releasing the chlorine dioxide is measured by an iodometry method.
Example 1:
(1) dissolving 1 part of sodium carbonate, 12 parts of sodium chlorite and 1 part of sodium sulfate by 40 parts of water, then adding 70 parts of mesoporous silicon, and drying at 60 ℃ for 2 hours to obtain solid A;
(2) and mixing the solid A with 8 parts of polyethylene glycol, then adding 2 parts of dried calcium chloride, 2 parts of calcium oxide, 2 parts of sodium dihydrogen phosphate and 2 parts of sodium bicarbonate, uniformly mixing, and finally sealing and packaging to obtain the slow-release air purifying agent.
When in use, the slow-release air purifying agent is firstly sealed, and generates chemical reaction to release heat when meeting moisture, so that the product can quickly start reaction by self-heating and heating at 5-10 ℃, and is stably and slowly released in gel.
The sustained-release rate of 100g of the sustained-release air purification agent prepared in this example was 6-8 mg/h.
Example 2:
(1) dissolving 1 part of sodium carbonate, 10 parts of sodium chlorite and 1 part of magnesium sulfate by using 40 parts of water, then adding 70 parts of zeolite, and drying at 60 ℃ for 2 hours to obtain a solid A;
(2) and mixing the solid A with 10 parts of sodium polyacrylate, then adding 2 parts of dried calcium chloride, 2 parts of calcium oxide, 2 parts of sodium dihydrogen phosphate and 2 parts of sodium bicarbonate, uniformly mixing, and sealing and packaging to obtain the slow-release air purifying agent.
When in use, the slow-release air purifying agent is firstly sealed, and generates chemical reaction to generate heat when meeting moisture, so that the product can quickly start reaction by self-heating and heating at 5-10 ℃, and is stably and slowly released in gel.
The slow release rate of 100g of the slow release air purifying agent prepared by the embodiment is 5-7 mg/h.
Example 3:
most of the same is true as in example 1, except that in this example, the polyethylene glycol is replaced with polyvinyl alcohol.
Example 4:
compared with example 1, most of the results are the same, except that in this example, the polyethylene glycol is changed to polyacrylamide.
Example 5:
most of the results were the same as in example 1, except that in this example, 12 parts of sodium chlorite was changed to 11 parts of sodium chlorite.
Example 6:
compared with the example 1, most of the materials are the same, except that in the example, 8 parts of polyethylene glycol is changed into 9 parts of polyethylene glycol, the viscosity of the gel is improved, and the slow release rate of the prepared 100g of slow release air purifying agent is 6-7 mg/h.
Example 7:
most of them were the same as in example 1 except that in this example, drying at 60 ℃ for 2 hours was changed to drying at 50 ℃ for 1 hour.
Example 8:
most of them were the same as in example 1 except that in this example, drying at 60 ℃ for 2 hours was changed to drying at 70 ℃ for 3 hours.
Comparative example 1:
most of the results were the same as in example 1, except that in this comparative example, calcium chloride and calcium oxide were not added. The prepared purifying agent still has no obvious chlorine dioxide release detected after being placed for 24 hours, and the sodium chlorite decomposition reaction is started slowly, compared with the example 1, the result shows that the addition of the calcium chloride and the calcium oxide can quickly start the sodium chlorite decomposition reaction and accelerate the release rate of the chlorine dioxide.
Comparative example 2:
compared with the example 1, most of the purification agents are the same except that in the comparative example, 2 parts of calcium chloride and 2 parts of calcium oxide are changed into 4 parts of calcium chloride and 4 parts of calcium oxide, the prepared purifying agent has high speed of releasing chlorine dioxide, but has short duration and basically releases all chlorine dioxide within 48 hours.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The solid slow-release air purifying agent is characterized by comprising the following raw materials in parts by weight: 1 part of sodium carbonate, 10-12 parts of sodium chlorite, 1 part of sulfate, 70 parts of adsorbent, 8-10 parts of water-absorbing resin, 2 parts of calcium chloride, 2 parts of calcium oxide, 2 parts of sodium dihydrogen phosphate and 2 parts of sodium bicarbonate.
2. The solid slow-release air purifying agent according to claim 1, wherein the sulfate is sodium sulfate or magnesium sulfate.
3. The solid slow-release air purifying agent as claimed in claim 1, wherein the adsorbent is mesoporous silicon or zeolite.
4. The solid slow-release air purifying agent as claimed in claim 1, wherein the water-absorbent resin is polyethylene glycol, sodium polyacrylate, polyvinyl alcohol or polyacrylamide.
5. The method for preparing a solid slow-release air purifying agent as claimed in any one of claims 1 to 4, wherein the method comprises the steps of:
(1) dispersing sodium carbonate, sodium chlorite and sulfate in water, adding an adsorbent, and drying to obtain a solid A;
(2) and (2) mixing the solid A obtained in the step (1) with water-absorbing resin, adding calcium chloride, calcium oxide, sodium dihydrogen phosphate and sodium bicarbonate, uniformly mixing, and hermetically packaging to obtain the target product.
6. The method for preparing a solid slow-release air purifying agent according to claim 5, wherein in the step (1), the mass ratio of the sodium carbonate, the sodium chlorite, the sulfate, the water and the adsorbent is 1: (10-12): 1: 40: 70.
7. the method for preparing a solid slow-release air purifying agent according to claim 5, wherein in the step (1), the mass ratio of the sodium carbonate, the sodium chlorite, the sulfate, the water and the adsorbent is 1: 10: 1: 40: 70.
8. the method for preparing a solid slow-release air purifying agent according to claim 5, wherein in the step (1), the mass ratio of the sodium carbonate, the sodium chlorite, the sulfate, the water and the adsorbent is 1: 12: 1: 40: 70.
9. the method for preparing a solid slow-release air purifying agent according to claim 5, wherein in the step (1), the drying temperature is 50-70 ℃ and the drying time is 1-3 hours.
10. The method for preparing a solid slow-release air purifying agent according to claim 5, wherein in the step (1), the drying temperature is 60 ℃ and the drying time is 2 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111411196.XA CN114146209A (en) | 2021-11-25 | 2021-11-25 | Solid slow-release air purifying agent and preparation method thereof |
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| CN202111411196.XA CN114146209A (en) | 2021-11-25 | 2021-11-25 | Solid slow-release air purifying agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462160A (en) * | 2023-03-29 | 2023-07-21 | 大连交通大学 | By flue gas SO 2 Method and system for preparing steady-state chlorine dioxide for raw materials |
| CN116462160B (en) * | 2023-03-29 | 2024-05-24 | 大连交通大学 | By flue gas SO2Method and system for preparing steady-state chlorine dioxide for raw materials |
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| CN107494588A (en) * | 2017-09-13 | 2017-12-22 | 广州海音环保科技有限公司 | A kind of slow-release solid chlorine dioxide propellant and preparation method thereof |
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Cited By (2)
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| CN116462160A (en) * | 2023-03-29 | 2023-07-21 | 大连交通大学 | By flue gas SO 2 Method and system for preparing steady-state chlorine dioxide for raw materials |
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