CN107159153B - Modified diatomite smoke removal block and preparation method thereof - Google Patents
Modified diatomite smoke removal block and preparation method thereof Download PDFInfo
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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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
- A61L9/013—Deodorant compositions containing animal or plant extracts, or vegetable material
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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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0275—Other waste gases from food processing plants or kitchens
Abstract
The invention relates to a modified diatomite smoke-removing block and a preparation method thereof. The modified diatomite smoke removal block prepared by the invention is convenient to carry, is suitable for various occasions, can be used for removing indoor and outdoor peculiar smell and oil smoke, has stable performance and high repeated utilization rate, and meanwhile, has simple manufacturing process, is convenient to carry, has strong purification effect and is easy for industrial production.
Description
Technical Field
The invention relates to the technical field of application of diatomite composite materials, in particular to a modified diatomite smoke removal block and a preparation method thereof.
Background
The kitchen oil smoke contains more than 300 harmful substances, the most main lung cancer carcinogen is DNP, DNP inhaled by housewives when preparing a meal in a kitchen is 188 times of that in outdoor fresh air, and many housewives cannot tolerate elegant long hairs and have unpleasant oil smoke smell, which becomes a main reason that the housewives are far away from the kitchen, and more seriously, the harmful substances in the oil smoke are a main reason that women are infected with lung diseases. In fact, there are many carcinogens in the kitchen that can cause cancer in humans, and it is known that the increase in female cancer may be related to oil smoke in the kitchen. Excessive heating of cooking oil (smoking) can produce harmful carcinogens. Especially, when the food is fried, the food is full of kitchen oil smoke, and the harm is great. In the kitchen, not only the soot is carcinogenic, but also the oil (oil for fried food) repeatedly heated contains carcinogenic substances. Scientific research has found that common fuels produce carcinogens and that the quantities produced are very large. The smoke can cause cough, expectoration and asthma due to the stimulation of the respiratory tract; the eye is stimulated to cause lacrimation, conjunctivitis and the like. When the range hood is used in a kitchen, the suction amount of oil smoke can be effectively reduced, and the key point for reducing the sucked carcinogenic substances is that. However, when the cooking device is used for outdoor barbecue, picnic or cooking in a cool shed in the open air, the cooking device is not provided with a range hood due to the limitation of conditions, and a large amount of oil smoke causes great harm to human bodies in the case.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a modified diatomite smoke removal block which is convenient to carry and can effectively remove indoor and outdoor peculiar smell and oil smoke and a preparation method thereof.
The invention is realized by the following technical scheme:
the formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 30-40 parts of diatomite, 5-8 parts of storax, 10-15 parts of ceramsite and 5-10 parts of activated alumina.
Preferably, the particle size of the diatomite is 30 to 35 μm.
Preferably, the storax is a massive solid, and the storax comprises the following components in percentage by mass: 40 to 50 percent of total balsam acid, 35 to 40 percent of resin and the balance of impurities.
Preferably, the grain size of the ceramsite is 15-20 μm.
Preferably, the preparation method of the activated alumina comprises the following steps: 1) adding 10-15 parts by weight of apatite and 5-10 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 3-5 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution obtained in the step 1) into the suspension obtained in the step 2), and stirring to prepare slurry, wherein the stirring speed is 100-200 r/min; 4) adjusting the pH value of the slurry to be 4.0-4.5; 5) and cooling the slurry to-5-0 ℃, preserving the temperature for 30-40 min, and then putting the slurry into an oven for roasting for 40-50 min at the roasting temperature of 800-900 ℃ to obtain the activated alumina.
Preferably, the modified diatomite smoke-removing block consists of the following components in parts by weight: 35 parts of diatomite, 7 parts of storax, 12 parts of ceramsite and 8 parts of activated alumina.
Preferably, the smoke removing block is applied to removing indoor and outdoor peculiar smell and oil smoke.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7-8 mol/L, stirring for 30-35 min under the conditions that the temperature is 35-37 ℃ and the stirring speed is 50-70 r/min, taking out the diatomite, washing the diatomite to be neutral, and placing the diatomite into an oven with the temperature of 370-380 ℃ for constant-temperature drying for 6-8 h to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at 700-750 ℃ to obtain mixed particles;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, and mixing and stirring for 6-7 h at the temperature of 85-90 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
Preferably, in the step (1), the diatomite is placed into a hydrochloric acid solution with a mass concentration of 7.5mol/L, stirred for 32min at a temperature of 36 ℃ and a stirring speed of 60r/min, taken out and washed to be neutral, and placed into an oven with a temperature of 375 ℃ for constant-temperature drying for 7h, so as to obtain the modified diatomite.
Storax, a resin secreted by the storax tree of the family Hamamelidaceae. The storax tree belongs to the genus of storax, the family of Hamamelidaceae, and is 10-15 m high. Leaf intergrowth; a long handle is provided; small leaf, early fall; the palm of the blade has 5 cracks, even 3 or 7 cracks, the split blade has an oval shape or an oblong oval shape, the tip is sharp, the base is heart-shaped, and the edge is provided with sawteeth. In early summer, the bark is wounded or cut to reach the wood part, so that the balsam resin is infiltrated into the bark. Peeling off bark in autumn, squeezing to obtain resina Citri, decocting the residue with water, and squeezing to obtain common storax. Dissolving in ethanol, filtering, and evaporating to remove ethanol to obtain refined storax. Has the effects of inducing resuscitation, removing dirt, resolving stagnation, eliminating phlegm, promoting qi circulation and relieving pain.
The ceramsite is ceramic granules. The appearance characteristics of the ceramsite are mostly round or oval spheres, the surface of the ceramsite is provided with a layer of hard outer shell, and the outer shell is ceramic or enamel, has the effects of water and gas isolation, and endows the ceramsite with higher strength. The particle size of the ceramsite is generally 5-20 mm, and the maximum particle size is 25 mm. The self bulk density of the ceramsite is less than 1100kg/m3, and is generally 300-900 kg/m 3. The ceramsite has good heat insulation performance due to the porous interior.
Activated alumina, also known as activated alumina, is a commonly used and proprietary "activated alumina" used in catalysts, and is a porous, highly dispersed solid material with a large surface area and microporous surfaces having the characteristics required for catalytic action, such as adsorption properties, surface activity, excellent thermal stability, etc., and is therefore widely used as a catalyst and catalyst support for chemical reactions. The active alumina has uniform granularity, smooth surface, high mechanical strength, high hydroscopicity, no swelling and cracking after water absorption, no toxicity, no smell, no water solubility and no ethanol. Activated alumina is a highly effective drying agent for deep drying with trace water.
Diatomite is a porous biological silicalite formed by primary diagenesis after remains of ancient unicellular lower plant diatoms are stacked and deposited. The diatomite wall shell is composed of diatomite wall shells, wherein the diatomite wall shells are provided with a plurality of stages of micropores which are orderly arranged, the diatomite has the characteristics of small density, large specific surface area, good adsorbability, acid resistance, alkali resistance, insulation and the like, the unique surface structure and the excellent adsorbability are suitable for being used as an adsorbing material, and the diatomite mineral resources in China are abundant in storage amount, low in price and easy to obtain. Diatomaceous earth is made of amorphous SiO2Composition and containing a small amount of Fe2O3、CaO、MgO、Al2O3And organic impurities. Diatomaceous earth is generally light yellow or light gray in color, soft, porous and light. The main component of diatomite is silicic acid, which has the characteristics of super fiber, porous property and the like, and the ultra-fine pores of the diatomite are 5000 to 6000 times more than those of charcoal. When the indoor humidity rises, the ultramicropores on the diatomite can automatically absorb the moisture in the air and store the moisture. If the moisture in the indoor air is reduced,The moisture content is reduced, and the diatomite can release the water stored in the ultramicropores. The diatomite also has the function of eliminating peculiar smell and the function of keeping indoor cleanness.
According to the modified diatomite smoke removal block and the preparation method thereof, firstly, the diatomite is subjected to physical modification and chemical modification, so that the specific surface area and the pore diameter of the diatomite can be increased, the adsorption capacity of the diatomite is increased when the specific surface area is increased, the diffusion rate of impurities in the diatomite pores is accelerated when the pore diameter is increased, and the adsorption balance is favorably achieved; the adsorption capacity of the diatomite is increased, and the diatomite is accelerated to reach adsorption balance; the apatite and the calcium hydroxide are added during the preparation of the activated alumina, so that the prepared activated alumina has good high-temperature resistance, is stored at low temperature before roasting, and then is roasted at high temperature, so that the specific surface area of the activated alumina can be increased, and the performance of the activated alumina can be more stable; the added ceramsite has good adsorption performance and heat insulation performance due to the internal porosity, so that the prepared modified diatomite has stronger adsorption performance and more stable performance for removing smoke blocks; the added storax can emit light fragrance, can improve the condition of various peculiar smells in the air, and simultaneously, because the storax has high fat content, the storax acts as a solvent, can adsorb a large amount of black coal smoke on the surface of the black coal smoke, is easy to separate the black coal smoke for preparing ink, printing ink and the like, and changes waste into valuable; the prepared modified diatomite smoke-removing block has stable performance and can be repeatedly utilized.
Compared with the prior art, the invention has the beneficial effects that:
1. the modified diatomite is convenient to carry except for smoke blocks, is suitable for various occasions, and can be used for removing indoor and outdoor peculiar smell and oil smoke.
2. The modified diatomite has stable smoke removal block performance and high recycling rate.
3. The modified diatomite smoke removal block has the advantages of simple manufacturing process, strong purification effect and easy industrial production.
Detailed Description
The following examples may help one skilled in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
Example 1: preparation of modified diatomaceous Earth Smoke removal Block
The formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 30 parts of diatomite with the grain diameter of 30 mu m, 5 parts of storax, 10 parts of ceramsite with the grain diameter of 15 mu m and 5 parts of activated alumina, wherein the storax comprises the following components in percentage by mass: 40% of total balsamic acid, 35% of resin and the balance of impurities.
The preparation method of the activated alumina comprises the following steps: 1) adding 10 parts by weight of apatite and 5 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 3 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution in the step 1) into the suspension in the step 2), and stirring to prepare slurry, wherein the stirring speed is 100 r/min; 4) adjusting the pH value of the slurry to 4.0; 5) and cooling the slurry to-5 ℃ and preserving heat for 30min, and then putting the slurry into an oven to be roasted for 40min, wherein the roasting temperature is 800 ℃, so as to obtain the activated alumina.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7mol/L, stirring for 30min at the temperature of 35 ℃ and the stirring speed of 50r/min, taking out the diatomite, washing with water to be neutral, and placing the diatomite into an oven with the temperature of 370 ℃ for constant-temperature drying for 6h to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at 700 ℃ to obtain mixed granules;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, mixing and stirring for 6 hours at the temperature of 85 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
Example 2: preparation of modified diatomaceous Earth Smoke removal Block
The formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 40 parts of diatomite with the particle size of 35 mu m, 8 parts of storax, 15 parts of ceramsite with the particle size of 20 mu m and 10 parts of activated alumina, wherein the storax comprises the following components in percentage by mass: 50% of total balsamic acid, 40% of resin and the balance of impurities.
The preparation method of the activated alumina comprises the following steps: 1) adding 15 parts by weight of apatite and 10 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 5 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution in the step 1) into the suspension in the step 2), and stirring to prepare slurry, wherein the stirring speed is 200 r/min; 4) adjusting the pH value of the slurry to 4.5; 5) and (3) cooling the slurry to 0 ℃ and preserving heat for 40min, and then putting the slurry into an oven to be roasted for 50min, wherein the roasting temperature is 900 ℃, so as to obtain the activated alumina.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 8mol/L, stirring for 35min at the temperature of 37 ℃ and the stirring speed of 70r/min, taking out the diatomite, washing with water to be neutral, and placing the diatomite into an oven with the temperature of 380 ℃ for constant-temperature drying for 8h to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at the sintering temperature of 750 ℃ to obtain mixed granules;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, mixing and stirring for 7 hours at the temperature of 90 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
Example 3: preparation of modified diatomaceous Earth Smoke removal Block
The formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 35 parts of diatomite with the grain diameter of 32 mu m, 7 parts of storax, 12 parts of ceramsite with the grain diameter of 18 mu m and 8 parts of activated alumina, wherein the storax comprises the following components in percentage by mass: 45% of total balsamic acid, 38% of resin and the balance of impurities.
The preparation method of the activated alumina comprises the following steps: 1) adding 12 parts by weight of apatite and 8 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 4 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution in the step 1) into the suspension in the step 2), and stirring to prepare slurry, wherein the stirring speed is 150 r/min; 4) adjusting the pH value of the slurry to be between 4.2; 5) and cooling the slurry to-3 ℃ and preserving heat for 35min, and then putting the slurry into an oven to be roasted for 45min, wherein the roasting temperature is 850 ℃, so as to obtain the activated alumina.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7.5mol/L, stirring for 32min at the temperature of 36 ℃ and the stirring speed of 60r/min, taking out the diatomite, washing with water to be neutral, and placing the diatomite into an oven with the temperature of 375 ℃ to be dried for 7h at constant temperature to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at the sintering temperature of 720 ℃ to obtain mixed granules;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, mixing and stirring for 6.5 hours at the temperature of 88 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
Example 4: preparation of modified diatomaceous Earth Smoke removal Block
The formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 35 parts of diatomite with the grain diameter of 32 mu m, 7 parts of storax, 12 parts of ceramsite with the grain diameter of 18 mu m and 8 parts of activated alumina, wherein the storax comprises the following components in percentage by mass: 45% of total balsamic acid, 38% of resin and the balance of impurities.
The preparation method of the activated alumina comprises the following steps: 1) adding 12 parts by weight of apatite and 8 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 4 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution in the step 1) into the suspension in the step 2), and stirring to prepare slurry, wherein the stirring speed is 150 r/min; 4) adjusting the pH value of the slurry to be between 4.2; 5) and then, putting the slurry into an oven for roasting for 45min, wherein the roasting temperature is 850 ℃, and obtaining the activated alumina.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7.5mol/L, stirring for 32min at the temperature of 36 ℃ and the stirring speed of 60r/min, taking out the diatomite, washing with water to be neutral, and placing the diatomite into an oven with the temperature of 375 ℃ to be dried for 7h at constant temperature to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at the sintering temperature of 720 ℃ to obtain mixed granules;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, mixing and stirring for 6.5 hours at the temperature of 88 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
Comparative example 1
The formula is as follows: the modified diatomite smoke removal block comprises the following components in parts by weight: 35 parts of kieselguhr with the grain diameter of 32 mu m, 12 parts of ceramsite with the grain diameter of 18 mu m and 8 parts of activated alumina.
The preparation method of the activated alumina comprises the following steps: 1) adding 12 parts by weight of apatite and 8 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 4 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution in the step 1) into the suspension in the step 2), and stirring to prepare slurry, wherein the stirring speed is 150 r/min; 4) adjusting the pH value of the slurry to be between 4.2; 5) and cooling the slurry to-3 ℃ and preserving heat for 35min, and then putting the slurry into an oven to be roasted for 45min, wherein the roasting temperature is 850 ℃, so as to obtain the activated alumina.
The preparation method comprises the following steps: a preparation method of the modified diatomite smoke-removing block comprises the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7.5mol/L, stirring for 32min at the temperature of 36 ℃ and the stirring speed of 60r/min, taking out the diatomite, washing with water to be neutral, and placing the diatomite into an oven with the temperature of 375 ℃ to be dried for 7h at constant temperature to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at the sintering temperature of 720 ℃ to obtain mixed granules;
(3) coating activated alumina: and (3) adding the activated alumina and the mixed particles obtained in the step (2) into propylene glycol, mixing and stirring for 6.5 hours at the temperature of 88 ℃ to obtain the mixed particles coated with the activated alumina, namely the modified diatomite smoke-removing block.
The following table 1 shows the results of measuring the performance of the modified diatomaceous earth smoke-removing blocks obtained in examples 1 to 4 and comparative example 1.
TABLE 1
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 |
| When the lampblack concentration is 5.0 mg/m in thin-wall rice, the lampblack adsorption rate/(%) | 90.7 | 91.9 | 92.5 | 84.4 | 86.6 |
| Recovery of adsorbed ink/(%) | 80.2 | 80.4 | 80.8 | 80.0 | 76.3 |
| Water absorption/(%) | 320 | 340 | 360 | 300 | 330 |
As can be seen from the performance measurement results of the modified diatomite smoke-removing blocks prepared in the above-mentioned examples 1-4 and the comparative example 1, the modified diatomite smoke-removing block prepared by the method has the advantages of strong purification effect, strong moisture absorption effect and high ink recovery rate.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The modified diatomite smoke removal block is characterized by comprising the following components in parts by weight: 30-40 parts of diatomite, 5-8 parts of storax, 10-15 parts of ceramsite and 5-10 parts of activated alumina; the storax is a blocky solid, and the storax comprises the following components in percentage by mass: 40-50% of total balsamic acid, 35-40% of resin and the balance of impurities;
the preparation method of the activated alumina comprises the following steps: 1) adding 10-15 parts by weight of apatite and 5-10 parts by weight of calcium hydroxide serving as a stabilizer into an ethanol solution to prepare a stabilizer solution; 2) adding 3-5 parts by weight of alumina into an ethanol solution to prepare a suspension; 3) adding the stabilizer solution obtained in the step 1) into the suspension obtained in the step 2), and stirring to prepare slurry, wherein the stirring speed is 100-200 r/min; 4) adjusting the pH value of the slurry to be 4.0-4.5; 5) and cooling the slurry to-5-0 ℃, preserving the temperature for 30-40 min, and then putting the slurry into an oven for roasting for 40-50 min at the roasting temperature of 800-900 ℃ to obtain the activated alumina.
2. The modified diatomite smoke abatement block of claim 1, wherein the diatomite has a particle size of 30 μm to 35 μm.
3. The modified diatomite smoke abatement block of claim 1, wherein the ceramsite has a particle size of 15 μm to 20 μm.
4. The modified diatomite smoke removal block as claimed in claim 1, wherein the modified diatomite smoke removal block is composed of the following components in parts by weight: 35 parts of diatomite, 7 parts of storax, 12 parts of ceramsite and 8 parts of activated alumina.
5. The modified diatomite smoke-removing block as claimed in any one of claims 1-4, wherein the smoke-removing block is used for removing indoor and outdoor peculiar smell and oil smoke.
6. The method for preparing the modified diatomite smoke-removing block as claimed in any one of claims 1-4, characterized by comprising the following steps:
(1) modified diatomite: placing diatomite into a hydrochloric acid solution with the mass concentration of 7-8 mol/L, stirring for 30-35 min under the conditions that the temperature is 35-37 ℃ and the stirring speed is 50-70 r/min, taking out the diatomite, washing the diatomite to be neutral, and placing the diatomite into an oven with the temperature of 370-380 ℃ for constant-temperature drying for 6-8 h to obtain the modified diatomite;
(2) and (3) granulating: uniformly mixing the modified diatomite obtained in the step (1) with ceramsite, granulating, and sintering at 700-750 ℃ to obtain mixed particles;
(3) coating activated alumina: adding activated alumina and the mixed particles obtained in the step (2) into propylene glycol, and mixing and stirring for 6-7 h at the temperature of 85-90 ℃ to obtain mixed particles coated with the activated alumina;
(4) adding storax: and (4) uniformly mixing storax and the mixed particles coated with the activated alumina in the step (3) and granulating to obtain the modified diatomite smoke-removing block.
7. The method for preparing the modified diatomite smoke removal block according to claim 6, wherein in the step (1), diatomite is placed into a hydrochloric acid solution with a mass concentration of 7.5mol/L, stirred for 32min at a temperature of 36 ℃ and a stirring speed of 60r/min, taken out and washed to be neutral, and placed into an oven with a temperature of 375 ℃ for constant-temperature drying for 7h to obtain the modified diatomite.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1397518A (en) * | 2002-08-28 | 2003-02-19 | 中国科学院长春应用化学研究所 | Process for preparing nano-class hydroxyphosphorite/alumina bioceramics |
| CN105272080A (en) * | 2015-09-29 | 2016-01-27 | 马鞍山杰创塑胶科技有限公司 | Aerated building block capable of purifying air, and making method thereof |
| CN106582114A (en) * | 2016-12-30 | 2017-04-26 | 东华大学 | Preparation method of air filtering material capable of releasing fragrance |
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| JP2004083333A (en) * | 2002-08-27 | 2004-03-18 | Takasago Kensetsu:Kk | Wall material for healthy housing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397518A (en) * | 2002-08-28 | 2003-02-19 | 中国科学院长春应用化学研究所 | Process for preparing nano-class hydroxyphosphorite/alumina bioceramics |
| CN105272080A (en) * | 2015-09-29 | 2016-01-27 | 马鞍山杰创塑胶科技有限公司 | Aerated building block capable of purifying air, and making method thereof |
| CN106582114A (en) * | 2016-12-30 | 2017-04-26 | 东华大学 | Preparation method of air filtering material capable of releasing fragrance |
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