CN108815548B - Preparation method of fly ash porous microbead deodorant - Google Patents
Preparation method of fly ash porous microbead deodorant Download PDFInfo
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- CN108815548B CN108815548B CN201810730364.3A CN201810730364A CN108815548B CN 108815548 B CN108815548 B CN 108815548B CN 201810730364 A CN201810730364 A CN 201810730364A CN 108815548 B CN108815548 B CN 108815548B
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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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- 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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Abstract
The invention discloses a preparation method of a fly ash porous microbead deodorant. The method comprises the following steps: firstly, preparing mixed slurry of concentrated sulfuric acid and metal oxide with different proportions by taking pretreated fly ash fine ash as a raw material; then placing the mixture into a muffle furnace for roasting to obtain roasted clinker; then soluble salt in the fly ash can be dissolved out through a water leaching and dissolving process, and the fly ash porous microbeads are obtained after water washing and drying; and finally, modifying the obtained fly ash micro-bead by using an organic modifier, fully mixing the fly ash micro-bead and the organic modifier, and aging at room temperature for a certain time to obtain the fly ash porous micro-bead deodorant. The method has the advantages of simple process and low production cost, and meanwhile, the pore structure of the prepared microbead material can be regulated and controlled, harmful gas can be effectively absorbed by modifying the microbead material, so that the high-efficiency utilization of solid waste is fully realized.
Description
Technical Field
The invention belongs to the field of comprehensive utilization of solid wastes, and particularly relates to a preparation method and application of a fly ash porous microbead deodorant.
Background
Fly ash is a main solid waste discharged by coal-fired power plants. The coal powder furnace is one of the most commonly used furnace types of the coal-fired power plant at present, and the coal powder furnace coal ash is also the coal ash type with the largest yield. The coal powder furnace fly ash is mainly composed of microbeads with different grain diameters, a small amount of irregular particles exist, and the main chemical component of the coal powder furnace fly ash is SiO2、Al2O3And other metal oxides, the crystal phases being mainly mullite and corundum. Because the combustion temperature in the boiler of the pulverized coal furnace is higher, part of inorganic minerals in the pulverized coal can be melted under the action of high temperature, and thus, spherical solid particles formed under the action of surface tension are the fly ash microbeads. The fly ash micro-beads have the advantages of good fluidity, good dispersibility and the like, are generally applied to the fields of rubber and plastic fillers, adsorbents and the like, and solve the problem of environment caused by stacking of fly ash to a certain extent.
With the continuous development of industry, environmental pollution is becoming a huge problem facing society increasingly. The harmful substances such as formaldehyde, benzene compounds, VOC and the like in the environment and building materials can cause serious harm to the health of people if people contact the substances for a long time. Therefore, researchers have been working on deodorants to find a deodorant that is inexpensive, highly effective in deodorizing, and easily available.
CN201610271586.4 discloses a solid air purification deodorant with degradation performance and a preparation method thereof. Tartaric acid, 4A zeolite and diatomite are mixed together to carry out chemical reaction, then the obtained product is dried and crushed, the powdery substance, phosphoric acid and potassium permanganate are aged, and finally granulation and drying treatment are carried out, so that the solid air purification deodorant product can be obtained. Although the deodorant obtained by the method has a good deodorizing effect, the process is complex. CN201710474172.6 discloses a rubber deodorant and a preparation method thereof. The rubber deodorant obtained by the invention consists of 60-80% of diatomite, 15-35% of pyroligneous and 2-8% of octadecylamine, and the combination of the diatomite and the rubber is promoted through the double functions of physical covering and chemical reaction, so that the rubber deodorant fully reacts with odor molecules to achieve the purpose of removing odor. CN201611010540.3 discloses a preparation method of a deodorant. The method mainly comprises the steps of respectively soaking silicate mineral powder and diatomite in a hydrochloric acid solution, then drying, mixing the obtained mineral powder and diatomite with calcium carbonate, industrial sodium chloride and metal sodium salt according to a certain proportion, then putting the mixture into a rotary kiln to calcine to obtain a metal oxide and silicate combination, and cooling, grinding, screening, infiltrating and drying to obtain the required product. CN201710753409.4 discloses a preparation method of a low-odor plastic master batch. The method comprises the steps of mixing tetrabutylammonium fluoride, ethylenediamine propanesulfonic acid sodium salt, anisyl alcohol and cinnamic acid methyl benzoate, and continuously stirring for a certain time at a certain rotating speed to obtain the plastic deodorant; then uniformly mixing the polyvinyl chloride resin, the white gum, the talcum powder, the coupling agent, the antioxidant and the plastic deodorant at a high speed, and extruding and granulating by using a plastic extruder to prepare the low-odor plastic master batch. The method is simple to operate and low in cost, but cannot fundamentally solve the problem of the smell emitted by organic components.
Aiming at the problems that the existing deodorant products (inorganic or organic substances such as activated carbon and the like) on the market are not suitable for large-scale production due to poor durability and complex process, the search for a deodorant with low price, simple process and high deodorizing efficiency becomes the key point of current research. The coal powder furnace fly ash microbeads are cheap and easy to obtain, have good dispersibility and flowability, and can be applied to the aspect of deodorant.
Disclosure of Invention
The invention aims to provide a preparation method of a fly ash porous microbead deodorant. The method has the characteristics of simple process, low production cost and high odor removal efficiency of the prepared deodorant.
The invention is realized by the following technical scheme:
(1) preparing mixed slurry of concentrated sulfuric acid and metal oxide in different proportions by taking fly ash fine ash obtained by grading and drying as a raw material;
(2) placing the obtained slurry in a ceramic crucible, and roasting in a muffle furnace under certain conditions;
(3) dissolving soluble salt in the obtained roasted clinker by adopting a water leaching dissolving method, washing and drying to obtain the fly ash porous microbeads;
(4) and (3) modifying the obtained fly ash porous microbead by using an organic modifier, uniformly mixing the fly ash porous microbead and the organic modifier, and aging at room temperature for a certain time to obtain the fly ash porous microbead deodorant.
The drying temperature in the step (1) is 120 ℃ until the fly ash reaches constant weight, and the particle size of the fly ash fine ash is D90-14.299 mu m.
The acid-to-ash ratio of the concentrated sulfuric acid to the metal oxide in the step (1) is 0.4-1.8.
The roasting conditions in the step (2) are as follows: the roasting temperature is 180-300 ℃, and the roasting time is 15-150 min.
The pH value of the fly ash porous microbeads obtained in the step (3) through the water leaching process is controlled to be about 6, and the moisture content of the fly ash porous microbeads obtained after drying is less than 1%.
The organic modifier in the step (4) is a silane coupling agent and stearic acid; the addition amount of the organic modifier is 0.1 to 3.0 percent; the aging time is more than 10 h.
The fly ash porous microbead deodorant is prepared by the method for preparing the fly ash porous microbead deodorant.
The invention has the beneficial effects that:
1. the invention realizes the high added value utilization of the fly ash, and realizes the purpose of controllable pore volume and pore diameter of the fly ash porous microbead by regulating and controlling the roasting condition;
2. the characteristics of fine, high dispersibility and fluidity of the fly ash micro-bead particles are fully utilized, and the uniform dispersion of the fly ash micro-bead particles in the high polymer material is facilitated;
3. the surface modification is carried out on the fly ash porous micro-beads by using the coupling agent, so that the compatibility of the fly ash porous micro-beads and a high polymer material is improved;
4. the preparation process is simple, the feasibility is strong, the cost is low, the odor removal effect is excellent, and the resource utilization of solid wastes is realized.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the following examples:
the fly ash porous microbead deodorant is prepared from raw materials produced by a power plant of inner Mongolia, and the chemical components of the fly ash porous microbead deodorant are shown in Table 1.
TABLE 1 chemical composition (wt.%) of pulverized coal furnace fly ash
The invention is further illustrated by the following examples in which:
example 1
The coal ash porous micro-beads are prepared by selecting the coal ash of the coal powder furnace (shown in table 1) and adopting a sulfuric acid roasting method. Classifying and drying the pulverized coal furnace fly ash to obtain a raw material (fly ash fine ash) for a test; mixing concentrated sulfuric acid and metal oxide in the fly ash according to the molar ratio of 1.8, and reacting in a muffle furnace at 300 ℃ for 150 min; and (3) dissolving the roasted clinker in water at 90 ℃ for 1h, washing the dissolved slag with water until the pH value is about 6, and drying at 120 ℃ to obtain the coal ash porous microbead. Adding an organic modifier stearic acid with the mass fraction of 2% of the fly ash porous micro-bead, uniformly mixing, and aging at room temperature for 12h to obtain the fly ash porous micro-beadAnd (4) removing the smell. The specific surface area of the obtained fly ash porous microbead is 28.603m2In terms of/g, the mean pore diameter is 9.45 nm.
Uniformly mixing 30.0g of polypropylene (PP), 0.6g of stearic acid and 0.6g of fly ash porous microbead deodorant at a high speed to obtain a mixture. And (3) putting the mixture into an internal mixer at 170 ℃ and internally mixing for 5min at the rotating speed of 30r/min to uniformly mix. And pressing the mixed materials on a flat vulcanizing machine at 180 ℃ for 1min under the pressure of 5 MPa. And taking out the pressed tablets after the temperature is reduced to the room temperature. And cutting the pressed sheet into small particles with uniform quality, heating 3g of the small particles to be detected at the temperature of 120 ℃ for 5h, and detecting the content of the organic volatile matters by using GC-FID (gas chromatography-hydrogen flame ionization detector). The TVOC (total volatile organic compound content) in the sample was averaged over 3 measurements.
Example 2
The coal ash porous micro-beads are prepared by selecting the coal ash of the coal powder furnace (shown in table 1) and adopting a sulfuric acid roasting method. Classifying and drying the pulverized coal furnace fly ash to obtain a raw material (fly ash fine ash) for a test; mixing concentrated sulfuric acid and metal oxide in the fly ash according to the molar ratio of 1.0, and reacting in a muffle furnace at 220 ℃ for 120 min; and (3) dissolving the roasted clinker in water at 90 ℃ for 1h, washing the dissolved slag with water until the pH value is about 6, and drying at 120 ℃ to obtain the coal ash porous microbead. Adding organic modifier stearic acid with the mass fraction of 3% of the fly ash porous microbead, uniformly mixing, and aging at room temperature for 12h to obtain the fly ash porous microbead deodorant. The specific surface area of the obtained fly ash porous microbead is 20.541m2In terms of/g, the mean pore diameter is 4.28 nm.
Uniformly mixing 30.0g of polypropylene (PP), 0.9g of stearic acid and 0.4g of fly ash porous microbead deodorant at a high speed to obtain a mixture. And (3) putting the mixture into an internal mixer at 170 ℃ and internally mixing for 5min at the rotating speed of 30r/min to uniformly mix. And pressing the mixed materials on a flat vulcanizing machine at 180 ℃ for 1min under the pressure of 5 MPa. And taking out the pressed tablets after the temperature is reduced to the room temperature. And cutting the pressed sheet into small particles with uniform quality, heating 3g of the small particles to be detected at the temperature of 120 ℃ for 5h, and detecting the content of the organic volatile matters by using GC-FID (gas chromatography-hydrogen flame ionization detector). The TVOC (total volatile organic compound content) in the sample was averaged over 3 measurements.
Example 3
The coal ash porous micro-beads are prepared by selecting the coal ash of the coal powder furnace (shown in table 1) and adopting a sulfuric acid roasting method. Classifying and drying the pulverized coal furnace fly ash to obtain a raw material (fly ash fine ash) for a test; mixing concentrated sulfuric acid and metal oxide in the fly ash according to the molar ratio of 0.6, and reacting in a muffle furnace at 180 ℃ for 100 min; and (3) dissolving the roasted clinker in water at 90 ℃ for 1h, washing the dissolved slag with water until the pH value is about 6, and drying at 120 ℃ to obtain the coal ash porous microbead. Adding organic modifier stearic acid with the mass fraction of 0.5 percent of the fly ash porous microbead, uniformly mixing, and aging at room temperature for 12h to obtain the fly ash porous microbead deodorant. The specific surface area of the obtained fly ash porous microbead is 13.066m2In terms of/g, the mean pore diameter was 3.82 nm.
Uniformly mixing 30.0g of polypropylene (PP), 0.15g of stearic acid and 0.2g of fly ash porous microbead deodorant at a high speed to obtain a mixture. And (3) putting the mixture into an internal mixer at 170 ℃ and internally mixing for 5min at the rotating speed of 30r/min to uniformly mix. And pressing the mixed materials on a flat vulcanizing machine at 180 ℃ for 1min under the pressure of 5 MPa. And taking out the pressed tablets after the temperature is reduced to the room temperature. And cutting the pressed sheet into small particles with uniform quality, heating 3g of the small particles to be detected at the temperature of 120 ℃ for 5h, and detecting the content of the organic volatile matters by using GC-FID (gas chromatography-hydrogen flame ionization detector). The TVOC (total volatile organic compound content) in the sample was averaged over 3 measurements.
Comparative example 1
The procedure was exactly the same as in example 1 above, except that no fly ash porous microbead odor remover was added.
The content of organic volatile was measured by the methods of each example and comparative example, respectively, and the test results are shown in Table 2.
TABLE 2 content of organic volatiles
Claims (6)
1. The preparation method of the fly ash porous microbead deodorant is characterized by comprising the following steps: (1) preparing mixed slurry with different proportions by taking fly ash fine ash obtained by grading and drying as a raw material according to the molar ratio of concentrated sulfuric acid to metal oxide in the fly ash; (2) placing the obtained slurry in a ceramic crucible, and roasting in a muffle furnace under certain conditions; (3) dissolving soluble salt in the obtained roasted clinker by adopting a water leaching dissolving method, washing and drying to obtain the fly ash porous microbeads; (4) and (3) modifying the obtained fly ash porous microbead by using an organic modifier, uniformly mixing the fly ash porous microbead and the organic modifier, and aging at room temperature for a certain time to obtain the fly ash porous microbead deodorant.
2. The method for preparing the fly ash porous microbead deodorant according to claim 1, which is characterized in that: the drying temperature in the step (1) is 120 ℃ until the fly ash reaches a constant weight, and the particle size of the fly ash fine ash is D90=14.299 mu m.
3. The method for preparing the fly ash porous microbead deodorant according to claim 1, which is characterized in that: the acid-to-ash ratio of the concentrated sulfuric acid to the metal oxide in the step (1) is 0.4-1.8.
4. The method for preparing the fly ash porous microbead deodorant according to claim 1, which is characterized in that: the roasting conditions in the step (2) are as follows: the roasting temperature is 180-300 ℃, and the roasting time is 15-150 min.
5. The method for preparing the fly ash porous microbead deodorant according to claim 1, which is characterized in that: the pH value of the fly ash porous microbeads obtained in the step (3) through the water leaching process is controlled to be about 6, and the moisture content of the fly ash porous microbeads obtained after drying is less than 1%.
6. The method for preparing the fly ash porous microbead deodorant according to claim 1, which is characterized in that: the organic modifier in the step (4) is a silane coupling agent and stearic acid; the addition amount of the organic modifier is 0.1 to 3.0 percent; the aging time is more than 10 h.
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| CN110615644A (en) * | 2019-10-31 | 2019-12-27 | 廖少忠 | Light partition board capable of adsorbing harmful gas such as formaldehyde and its making process |
| CN111777866A (en) * | 2020-07-29 | 2020-10-16 | 山东高速物资储运有限公司 | Efficient deodorant for rubber modified asphalt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602252A (en) * | 1983-06-21 | 1985-01-08 | 田中 友爾 | Long-lasting deodorizing method |
| CN101348578A (en) * | 2008-09-08 | 2009-01-21 | 淮南市金源粉煤灰有限责任公司 | Preparation of modified fly ash micro-sphere rubber filling |
| CN101700491B (en) * | 2009-11-09 | 2011-07-20 | 中国海洋石油总公司 | Method for modifying fly ash |
| CN104177654A (en) * | 2014-08-16 | 2014-12-03 | 青岛供八方塑料有限公司 | Regenerated plastic deodorant |
| CN107930576A (en) * | 2017-11-27 | 2018-04-20 | 吉林大学 | A kind of preparation method of fly ash micro-sphere porous material and obtained porous material |
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- 2018-07-05 CN CN201810730364.3A patent/CN108815548B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602252A (en) * | 1983-06-21 | 1985-01-08 | 田中 友爾 | Long-lasting deodorizing method |
| CN101348578A (en) * | 2008-09-08 | 2009-01-21 | 淮南市金源粉煤灰有限责任公司 | Preparation of modified fly ash micro-sphere rubber filling |
| CN101700491B (en) * | 2009-11-09 | 2011-07-20 | 中国海洋石油总公司 | Method for modifying fly ash |
| CN104177654A (en) * | 2014-08-16 | 2014-12-03 | 青岛供八方塑料有限公司 | Regenerated plastic deodorant |
| CN107930576A (en) * | 2017-11-27 | 2018-04-20 | 吉林大学 | A kind of preparation method of fly ash micro-sphere porous material and obtained porous material |
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