CN110585915A - Composite air catalyst spherical nano-mineral crystal purification particle and preparation method thereof - Google Patents
Composite air catalyst spherical nano-mineral crystal purification particle and preparation method thereof Download PDFInfo
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- CN110585915A CN110585915A CN201910944992.6A CN201910944992A CN110585915A CN 110585915 A CN110585915 A CN 110585915A CN 201910944992 A CN201910944992 A CN 201910944992A CN 110585915 A CN110585915 A CN 110585915A
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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
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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
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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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
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
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Abstract
The invention relates to a composite air catalyst spherical nano-mineral crystal purification particle and a preparation method thereof, wherein the purification particle takes tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder as raw materials and is also added with nano-magnesium hydroxide, micron-sized magnesium hydroxide and an air catalyst; tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder have good adsorbability on harmful gases such as formaldehyde, the air catalyst can better catalyze the harmful gases such as formaldehyde to react with oxygen in the air under the synergistic effect of nano-scale magnesium hydroxide and micron-scale magnesium hydroxide to generate water and carbon dioxide, secondary pollution is not caused, the air catalyst does not directly participate in the reaction, no loss and reduction are caused, and therefore the composite air catalyst spherical nano-mineral crystal purification particles have strong adsorbability on formaldehyde and continuous decomposition capability on formaldehyde, are long in service cycle, do not need airing and cannot generate secondary pollution.
Description
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to composite air catalyst spherical nano-mineral crystal purification particles and a preparation method thereof.
Background
Building materials of newly decorated homes, indoor furniture, painted bottom plates and newly bought vehicles can generate toxic gases such as formaldehyde, benzene, xylene and radon, which harm human health, and the toxic gases can stay in the living environment of people for a long time, and the formaldehyde is an important component of the adhesive, so that all the building materials, the artificial boards, the coatings (mainly wall surface base layers), the carpets and the furniture which relate to the adhesive can contain the formaldehyde. Formaldehyde is a colorless, pungent gas with a strong odor.
The health hazard of formaldehyde mainly comprises the following aspects: (1) stimulation: the main harm of formaldehyde is represented by the stimulation effect on skin mucosa, and the formaldehyde is a raw pulp toxic substance and can be combined with protein, so that severe respiratory tract stimulation, edema, eye stimulation and headache can be caused when the formaldehyde is inhaled at high concentration. (2) Sensitization: the skin directly contacts with formaldehyde to cause allergic dermatitis, mottle, and necrosis, and bronchial asthma can be induced when high concentration formaldehyde is inhaled. (3) Mutagenic action: high concentrations of formaldehyde are also a genotoxic substance. The experimental animal can cause nasopharyngeal tumor under the condition of high concentration inhalation in a laboratory. (4) The prominent performance is as follows: headache, dizziness, debilitation, nausea, emesis, chest distress, ophthalmalgia, throat pain, anorexia, cardiopalmus, insomnia, weight loss, hypomnesis and vegetative nerve disorder; the long-term inhalation of pregnant women can cause fetal deformity and even death, and the long-term inhalation of men can cause sperm malformation and death of men.
The existing formaldehyde removing method and the product mainly comprise the following steps: ventilation, green plants, air purifying agent, active carbon and carbon synthesized particles. The method and the product have the problems of incomplete treatment, low efficiency and easy generation of secondary pollution.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite air catalyst spherical nano-mineral crystal purification particle capable of adsorbing formaldehyde and effectively decomposing formaldehyde and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
a composite air catalyst spherical nano-mineral crystal purification particle comprises the following raw material components:
8-12 parts by weight of a mixture of nano-scale magnesium hydroxide and micron-scale magnesium hydroxide;
8-12 parts of tourmaline;
5-15 parts of sepiolite;
2-5 parts of diatomite;
2-8 parts of bentonite;
2-8 parts of attapulgite;
1-5 parts of anion powder;
2.5-4 parts of air catalyst.
Further preferably, the raw material components of the composite air catalyst spherical nano-mineral crystal purification particles comprise:
10 parts by weight of a mixture of nanoscale magnesium hydroxide and micron-sized magnesium hydroxide;
10 parts of tourmaline;
10 parts of sepiolite;
3.5 parts of diatomite;
5 parts of bentonite;
5 parts of attapulgite;
3 parts of anion powder;
air catalyst, 3.2 parts by weight.
The mass ratio of the nano-scale magnesium hydroxide to the micro-scale magnesium hydroxide is 1:2-2: 1.
The mass ratio of the nano-scale magnesium hydroxide to the micro-scale magnesium hydroxide is 1: 1.
The air catalyst is prepared by adopting the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of inert gas, then adding isopropanol and sodium polyphosphate, carrying out full reaction, and then sequentially carrying out separation, washing and drying to obtain the air catalyst.
The inert gas is nitrogen.
The mass ratio of the isopropanol to the nano titanium dioxide is 2:1-5:1, and the mass ratio of the sodium polyphosphate to the nano titanium dioxide is 1:1-2: 1.
The preparation method of the composite air catalyst spherical nano-mineral crystal purification particles comprises the following steps:
(1) taking nano-scale magnesium hydroxide and micron-scale magnesium hydroxide, and drying for later use;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment in inert gas, cooling, crushing and sieving to obtain the composite air catalyst spherical nano mineral crystal purification particles.
In the step (1), the drying temperature is 40-60 ℃, and the drying time is 4-6 h.
In the step (2), the drying temperature is 40-60 ℃;
in the step (3), the temperature for carrying out the heat treatment is 200-500 ℃, and the time for carrying out the heat treatment is 2-5 h.
The invention has the beneficial effects that:
the composite air catalyst spherical nano-mineral crystal purification particle is prepared by adding nano-magnesium hydroxide, micron-sized magnesium hydroxide and an air catalyst on the basis of taking tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder as raw materials; wherein the tourmaline, the sepiolite, the diatomite, the bentonite, the attapulgite and the anion powder have good adsorbability to harmful gases such as formaldehyde, the air catalyst can better catalyze the harmful gases such as formaldehyde to react with oxygen in the air under the synergistic action of nano-scale magnesium hydroxide and micro-scale magnesium hydroxide to generate water and carbon dioxide, does not cause secondary pollution to the environment, and the air catalyst does not directly participate in the reaction after the catalytic reaction, does not cause the loss and reduction of the air catalyst, so that the finally prepared composite air catalyst spherical nano-mineral crystal purification particles not only have stronger adsorption capacity to formaldehyde, meanwhile, the formaldehyde decomposition agent has the capability of continuously decomposing formaldehyde, long service cycle and high formaldehyde removal rate, effectively decomposes formaldehyde for a long time, adsorbs harmful substances in air, does not need to be aired, and does not produce secondary pollution. The preparation method is simple to operate and low in raw material cost.
Detailed Description
The present invention will be described in detail with reference to specific examples.
In the following examples 1g is represented by 1 part by weight.
Example 1
The embodiment provides a compound air catalyst spherical nano-ore crystal purification particle, which comprises the following raw material components:
8 parts by weight of a mixture consisting of nano-scale magnesium hydroxide and micro-scale magnesium hydroxide according to the mass ratio of 1: 2;
12 parts of tourmaline;
5 parts of sepiolite;
5 parts of diatomite;
2 parts of bentonite;
8 parts of attapulgite;
1 part by weight of anion powder;
air catalyst, 4 weight portions.
The air catalyst is prepared by adopting the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of nitrogen until the particle size is 10nm, then adding isopropanol and sodium polyphosphate, wherein the mass ratio of the isopropanol to the nano titanium dioxide is 2:1, and the mass ratio of the sodium polyphosphate to the nano titanium dioxide is 1:1, carrying out full reaction, and then sequentially carrying out separation, water washing and drying at 50 ℃ to obtain the air catalyst.
The composite air catalyst spherical nano-mineral crystal purification particles are prepared by the following method, and the steps comprise:
(1) drying nanometer magnesium hydroxide and micrometer magnesium hydroxide at 40 deg.C for 6 hr;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying at 40 deg.C to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment for 5h at 200 ℃ in a nitrogen atmosphere, cooling, crushing and sieving to obtain the composite air catalyst spherical nano-mineral crystal purification particles.
Example 2
The embodiment provides a compound air catalyst spherical nano-ore crystal purification particle, which comprises the following raw material components:
12 parts by weight of a mixture consisting of nano-scale magnesium hydroxide and micro-scale magnesium hydroxide according to the mass ratio of 2: 1;
8 parts of tourmaline;
15 parts of sepiolite;
2 parts of diatomite;
8 parts of bentonite;
2 parts of attapulgite;
5 parts of anion powder;
2.5 parts of air catalyst.
The air catalyst is prepared by adopting the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of nitrogen until the particle size is 40nm, then adding isopropanol and sodium polyphosphate, wherein the mass ratio of the isopropanol to the nano titanium dioxide is 5:1, and the mass ratio of the sodium polyphosphate to the nano titanium dioxide is 2:1, carrying out full reaction, and then sequentially carrying out separation, water washing and drying at 40 ℃ to obtain the air catalyst.
The composite air catalyst spherical nano-mineral crystal purification particles are prepared by the following method, and the steps comprise:
(1) drying nanometer magnesium hydroxide and micrometer magnesium hydroxide at 60 deg.C for 4 hr;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying at 60 deg.C to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment for 2h at 500 ℃ in a nitrogen atmosphere, cooling, crushing and sieving to obtain the composite air catalyst spherical nano-mineral crystal purification particles.
Example 3
The embodiment provides a compound air catalyst spherical nano-ore crystal purification particle, which comprises the following raw material components:
10 parts by weight of a mixture consisting of nano-scale magnesium hydroxide and micro-scale magnesium hydroxide according to the mass ratio of 1: 1;
10 parts of tourmaline;
10 parts of sepiolite;
3.5 parts of diatomite;
5 parts of bentonite;
5 parts of attapulgite;
3 parts of anion powder;
air catalyst, 3.2 parts by weight.
The air catalyst is prepared by adopting the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of nitrogen until the particle size is 25nm, then adding isopropanol and sodium polyphosphate, wherein the mass ratio of the isopropanol to the nano titanium dioxide is 3.5:1, and the mass ratio of the sodium polyphosphate to the nano titanium dioxide is 1.5:1, and after full reaction, sequentially carrying out separation, water washing and drying at 60 ℃ to obtain the air catalyst.
The composite air catalyst spherical nano-mineral crystal purification particles are prepared by the following method, and the steps comprise:
(1) drying nanometer magnesium hydroxide and micrometer magnesium hydroxide at 50 deg.C for 5 hr;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying at 50 deg.C to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment for 3.5h at 350 ℃ in the nitrogen atmosphere, cooling, crushing and sieving to obtain the composite air catalyst spherical nano mineral crystal purification particles.
Example 4
The embodiment provides a compound air catalyst spherical nano-ore crystal purification particle, which comprises the following raw material components:
9 parts by weight of a mixture consisting of nano-scale magnesium hydroxide and micro-scale magnesium hydroxide according to the mass ratio of 1: 1;
11 parts of tourmaline;
8 parts of sepiolite;
4 parts of diatomite;
5 parts of bentonite;
6 parts of attapulgite;
2 parts of anion powder;
air catalyst, 3 weight portions.
The air catalyst is prepared by adopting the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of nitrogen until the particle size is 25nm, then adding isopropanol and sodium polyphosphate, wherein the mass ratio of the isopropanol to the nano titanium dioxide is 3.5:1, and the mass ratio of the sodium polyphosphate to the nano titanium dioxide is 1.5:1, carrying out full reaction, and then sequentially carrying out separation, water washing and drying at 50 ℃ to obtain the air catalyst.
The composite air catalyst spherical nano-mineral crystal purification particles are prepared by the following method, and the steps comprise:
(1) drying nanometer magnesium hydroxide and micrometer magnesium hydroxide at 50 deg.C for 5 hr;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying at 50 deg.C to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment for 3.5h at 350 ℃ in the nitrogen atmosphere, cooling, crushing and sieving to obtain the composite air catalyst spherical nano mineral crystal purification particles.
Comparative example 1
This comparative example differs from example 3 only in that: no air catalyst is added in the raw material components.
Comparative example 2
This comparative example differs from example 3 only in that: the raw material components are not added with nano-scale magnesium hydroxide and micro-scale magnesium hydroxide.
Examples of the experiments
The usable floor area of each room 6 newly decorated in a hotel is 20m2. The purification particles obtained in examples 1 to 4 and comparative examples 1 to 2 were placed in a room,12 places per room with 100g per bag of decontamination particles. After one week of use, the room was rechecked under the same conditions for formaldehyde concentrations as shown in table 1 below. Removal rate ═ formaldehyde initial concentration-formaldehyde concentration after purification)/formaldehyde initial concentration × 100%.
TABLE 1 results of formaldehyde removal
As can be seen from table 1, the composite air catalyst spherical nano-mineral crystal purification particles prepared by the methods of examples 1 to 4 of the present invention have a good formaldehyde removal rate, especially the formaldehyde removal rate of the purification particles described in example 3 is as high as 93.3%, because the air catalyst added in the components can better catalyze the reaction between harmful gases such as formaldehyde and oxygen in the air under the synergistic effect of nano-magnesium hydroxide and micro-magnesium hydroxide, so that the purification particles of the present invention have the ability of continuous decomposition while adsorbing formaldehyde.
In order to verify the formaldehyde purification effect of the composite air catalyst spherical nano-mineral crystal purification particles, the purification particles described in example 3 and the existing nano-mineral crystals (provided by Hangzhou Jiadu environmental protection technology Co., Ltd.) on the market were used as samples to be tested, and the samples were placed in a constant volume of 0.3m3And simultaneously, quantitatively injecting and adding formaldehyde into the small air bin, and then detecting the formaldehyde content in the air bin every day to evaluate the formaldehyde adsorption performance of the sample to be detected. Specifically, as shown in table 2.
TABLE 2 adsorption Properties of different samples on Formaldehyde
As can be seen from table 2: the commercially available nano-mineral crystals reach saturation on day 12 and begin to reversely release formaldehyde, but the composite air catalyst spherical nano-mineral crystal purification particles obtained in the embodiment 3 of the invention also keep a removal rate of nearly 70% for formaldehyde after day 43, thereby illustrating that the composite air catalyst spherical nano-mineral crystal purification particles of the invention have greatly prolonged service life and high formaldehyde removal rate and solve the problem of reversely releasing formaldehyde after the existing nano-mineral crystals are saturated.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (10)
1. The composite air catalyst spherical nano-mineral crystal purification particle is characterized by comprising the following raw material components:
8-12 parts by weight of a mixture of nano-scale magnesium hydroxide and micron-scale magnesium hydroxide;
8-12 parts of tourmaline;
5-15 parts of sepiolite;
2-5 parts of diatomite;
2-8 parts of bentonite;
2-8 parts of attapulgite;
1-5 parts of anion powder;
2.5-4 parts of air catalyst.
2. The composite air-catalyst spherical nano-mineral crystal purification particle as claimed in claim 1, wherein the raw material components comprise:
10 parts by weight of a mixture of nanoscale magnesium hydroxide and micron-sized magnesium hydroxide;
10 parts of tourmaline;
10 parts of sepiolite;
3.5 parts of diatomite;
5 parts of bentonite;
5 parts of attapulgite;
3 parts of anion powder;
air catalyst, 3.2 parts by weight.
3. The composite air-catalyst spherical nano-mineral crystal purification particle as claimed in claim 1, wherein the ratio of the amount of the nano-magnesium hydroxide to the amount of the micro-magnesium hydroxide is 1:2-2: 1.
4. The composite air-catalyst spherical nano-mineral crystal purification particle as claimed in claim 3, wherein the ratio of the amount of the nano-magnesium hydroxide to the micro-magnesium hydroxide is 1: 1.
5. The composite air-catalyst spherical nano-mineral crystal purification particle according to claim 1, wherein the air catalyst is prepared by the following method: taking nano titanium dioxide, carrying out superfine grinding under the condition of inert gas, then adding isopropanol and sodium polyphosphate, carrying out full reaction, and then sequentially carrying out separation, washing and drying to obtain the air catalyst.
6. The composite air-catalyst spherical nano-mineral crystal purification particle according to claim 5, wherein the inert gas is nitrogen.
7. The composite air-catalyst spherical nano-mineral crystal purification particle as claimed in claim 5, wherein the mass ratio of isopropanol to nano-titanium dioxide is 2:1-5:1, and the mass ratio of sodium polyphosphate to nano-titanium dioxide is 1:1-2: 1.
8. The method for preparing composite air-catalyst spherical nano-mineral crystal purification particles according to any one of claims 1 to 7, comprising the steps of:
(1) taking nano-scale magnesium hydroxide and micron-scale magnesium hydroxide, and drying for later use;
(2) adding tourmaline, sepiolite, diatomite, bentonite, attapulgite and anion powder, adding water, stirring, standing, separating, and oven drying to obtain solid phase substance;
(3) adding an air catalyst into the solid-phase substance, fully and uniformly mixing, carrying out heat treatment in inert gas, cooling, crushing and sieving to obtain the composite air catalyst spherical nano mineral crystal purification particles.
9. The method for preparing composite air-catalyst spherical nano-mineral crystal purification particles according to claim 1, wherein in the step (1), the temperature for drying is 40-60 ℃ and the time for drying is 4-6 h.
10. The method for preparing composite air-catalyst spherical nano-mineral crystal purification particles according to claim 1, wherein in the step (2), the temperature for drying is 40-60 ℃;
in the step (3), the temperature for carrying out the heat treatment is 200-500 ℃, and the time for carrying out the heat treatment is 2-5 h.
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