CN113967459A - Columnar particles capable of adsorbing and decomposing formaldehyde and preparation method and application thereof - Google Patents
Columnar particles capable of adsorbing and decomposing formaldehyde and preparation method and application thereof Download PDFInfo
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- CN113967459A CN113967459A CN202111304161.6A CN202111304161A CN113967459A CN 113967459 A CN113967459 A CN 113967459A CN 202111304161 A CN202111304161 A CN 202111304161A CN 113967459 A CN113967459 A CN 113967459A
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- decomposing formaldehyde
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
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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
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
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Abstract
The invention belongs to the technical field of environmental protection, and particularly relates to columnar particles capable of adsorbing and decomposing formaldehyde, and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding nano porous calcium silicate powder into a mixing container, then adding a potassium permanganate saturated solution, and uniformly stirring and mixing to obtain modified powder; (2) preparing the modified powder into columnar particles, and then drying the particles to obtain the columnar particles capable of adsorbing and decomposing formaldehyde. The interior of the particles prepared by the method keeps a fluffy porous structure, the air permeability is superior to that of modified alumina particles, the particles are used in an air purifier, the detection shows that the loading density is 0.36-0.45g/cm for the year, and the CADR value of formaldehyde is 280-360m for the year.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to columnar particles capable of adsorbing and decomposing formaldehyde, and a preparation method and application thereof.
Background
The potassium permanganate modified active alumina particle is the most commonly used formaldehyde treating material in air purifier. The modified activated alumina is used for replacing part of the columnar activated carbon particles, so that the formaldehyde treatment capacity can be greatly improved, but the alumina particles are high in hardness, poor in adsorption performance and low in porosity, so that the gas passing performance is poor, the formaldehyde CADR value of the air purifier is reduced, and only potassium permanganate loaded on the surfaces of the particles participates in the formaldehyde oxidation reaction under some conditions. In addition, after the potassium permanganate reacts with the adsorbed organic matters in a large amount, the generated organic acid or alcohol generates acid odor, and the use experience is seriously influenced.
Therefore, the development of a novel adsorbing material capable of obtaining a high formaldehyde CADR value and a high formaldehyde treatment capacity has important practical significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides columnar particles capable of adsorbing and decomposing formaldehyde and a preparation method and application thereof, the prepared particles keep fluffy porous structures inside, the air permeability is superior to that of modified alumina particles, the columnar particles are used in an air purifier, and the detection shows that the filling density is 0.36-0.45g/cm for carrying out thin film forging and thin film forging at the speed of 360m and thin film forging at the speed of 280 booms of formaldehyde CADR value.
In order to achieve the purpose, the invention adopts the following technical scheme:
in order to achieve the purpose, the invention is realized by the following technical scheme:
a columnar particle capable of adsorbing and decomposing formaldehyde and a preparation method thereof comprise the following steps:
(1) weighing 100 parts of nano porous calcium silicate powder according to parts by weight, and adding the nano porous calcium silicate powder into a kneading machine;
(2) weighing 4-12 parts of potassium permanganate saturated solution according to parts by weight, slowly adding the potassium permanganate saturated solution into a kneading machine under medium-high speed stirring, continuously stirring and uniformly mixing to obtain modified powder, and kneading for 30 min;
(3) and (3) preparing the modified powder into columnar particles by using a wet granulator, and drying the particles by using a vacuum microwave dryer until the water content is less than 1%, thus obtaining the columnar particles capable of adsorbing and decomposing formaldehyde.
Preferably, the nanoporous calcium silicate is prepared by the following method:
firstly, adding sodium silicate and water into a reaction kettle, sequentially adding aluminum salt and zinc salt while stirring, uniformly stirring, heating, then adding lime milk and seed crystal into the mixture, and reacting to obtain reaction slurry;
and secondly, adding weak acid into the reaction slurry obtained in the step I until the pH value is 8-9, then centrifugally dewatering until the water content is reduced to below 60% to obtain a filter cake, and drying the filter cake to obtain the nano porous calcium silicate.
Preferably, the seed crystal is activated alumina; wherein the mol ratio of the sodium silicate to the aluminum salt to the zinc salt to the water to the lime milk is 1: 0.05-0.1: 0.05-0.5: 100-300: 0.2 to 0.7; the addition amount of the seed crystal is 5-30% of the sum of the mass of the lime milk and the mass of the sodium silicate.
Preferably, the aluminum salt is sodium aluminate or/and aluminum sulfate; the zinc salt is zinc nitrate.
Preferably, the particle size of the nano porous calcium silicate is 300 meshes, and the specific surface area is 500-600m2Per g, porosity of 90-95%, pore volume of 0.5-0.8cm3/kg。
The columnar particles capable of adsorbing and decomposing formaldehyde prepared by any one of the above methods are provided with fluffy porous structures inside and are loaded with potassium permanganate.
The application of the columnar particles capable of adsorbing and decomposing formaldehyde is used in an air purifier, and detection shows that the filling density is 0.36-0.45g/cm for cultivation under the condition that the CADR value of formaldehyde is 280-360m for cultivation under the condition that the CADR value is higher than that of formaldehyde.
Advantageous effects
The invention discloses columnar particles capable of adsorbing and decomposing formaldehyde, which have the following advantages compared with the prior art:
(1) the interior of the particles keeps a fluffy porous structure, the air permeability is superior to that of the modified alumina particles, the particles are used in an air purifier, the detection shows that the loading density is 0.36-0.45g/cm for carrying out the year, and the formaldehyde CADR value is 280-;
(2) the vacuum microwave drying process replaces the traditional drying process, greatly reduces energy consumption and reduces the self-decomposition of potassium permanganate;
(3) the adsorption capacity is better than that of active alumina particles, and the loaded potassium permanganate can completely react due to the fluffy porous structure in the interior;
(4) organic acid and alcohol generated after organic matters oxidized and adsorbed by potassium permanganate are oxidized can react with nano porous calcium silicate, so that the generation of acid odor is avoided.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
A preparation method of nano-porous calcium silicate powder comprises the following steps:
adding 284kg of sodium silicate and 5400mol of water into a reaction kettle, sequentially adding 3.28kg of sodium aluminate, 20.5kg of aluminum sulfate and 148.7kg of zinc nitrate under stirring, uniformly stirring, heating to 60 ℃, then adding 51.8kg of lime milk and 100.74kg of seed crystal, stirring at 60 ℃, reacting for 50 minutes, and cooling to 30 ℃ to obtain reaction slurry; the seed crystal is activated alumina;
adding weak acid into the reaction slurry obtained in the step I until the pH value is 9, then centrifugally dewatering until the water content is reduced to below 60% to obtain a filter cake, and drying the filter cake at 80 ℃ to obtain the nano porous calcium silicate powder.
Example 2
A preparation method of columnar particles capable of adsorbing and decomposing formaldehyde comprises the following steps:
weighing 560m of specific surface area according to the parts by weight2100 parts of nano porous calcium silicate powder per gram, and adding into a kneading machine;
weighing 8 parts of potassium permanganate saturated solution according to parts by weight, slowly adding the potassium permanganate saturated solution into a kneading machine under medium-high speed stirring, continuously stirring and uniformly mixing to obtain modified powder, wherein the kneading time is 30 min;
and (3) preparing the modified powder into columnar particles by using a wet granulator, and drying the particles by using a vacuum microwave dryer until the water content is less than 1%, thus obtaining the columnar particles capable of adsorbing and decomposing formaldehyde.
Example 3
A preparation method of columnar particles capable of adsorbing and decomposing formaldehyde comprises the following steps:
weighing the specific surface area of 600m according to the parts by weight2100 parts of nano porous calcium silicate powder per gram, and adding into a kneading machine;
weighing 12 parts of potassium permanganate saturated solution according to the parts by weight, slowly adding the solution into a kneading machine under medium-high speed stirring, continuously stirring and uniformly mixing to obtain modified powder, wherein the kneading time is 30 min;
and (3) preparing the modified powder into columnar particles by using a wet granulator, and drying the particles by using a vacuum microwave dryer until the water content is less than 1%, thus obtaining the columnar particles capable of adsorbing and decomposing formaldehyde.
Example 4
Performing high pressure vacuum distillation on the column-shaped particles obtained by the method of example 2 at a packing density of 0.42g/cm for high pressure distillation under ethanol CADR 337 m.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A preparation method of columnar particles capable of adsorbing and decomposing formaldehyde is characterized by comprising the following steps:
(1) adding nano porous calcium silicate powder into a mixing container, then adding a potassium permanganate saturated solution, and uniformly stirring and mixing to obtain modified powder;
(2) preparing the modified powder into columnar particles, and then drying the particles to obtain the columnar particles capable of adsorbing and decomposing formaldehyde.
2. The method for preparing columnar particles capable of adsorbing and decomposing formaldehyde according to claim 1, wherein in the step (1), the amount of the nanoporous calcium silicate powder is 100 parts by weight, and the amount of the potassium permanganate saturated solution is 4-12 parts by weight.
3. The method for preparing columnar particles capable of adsorbing and decomposing formaldehyde according to claim 1, wherein in the step (1), the mixing container is a kneader, and the potassium permanganate saturated solution is slowly added into the kneader under medium-high speed stirring conditions.
4. The method for preparing columnar granules capable of adsorbing and decomposing formaldehyde according to claim 1, wherein in the step (2), the modified powder is prepared into columnar granules by using a wet granulator; the granules were dried using a vacuum microwave dryer to a moisture content of less than 1%.
5. The method for preparing the columnar particles capable of adsorbing and decomposing formaldehyde according to claim 1, wherein the nanoporous calcium silicate is prepared by the following method:
firstly, adding sodium silicate and water into a reaction kettle, sequentially adding aluminum salt and zinc salt while stirring, uniformly stirring, heating, then adding lime milk and seed crystal into the mixture, and reacting to obtain reaction slurry;
and secondly, adding weak acid into the reaction slurry obtained in the step I until the pH value is 8-9, then centrifugally dewatering until the water content is reduced to below 60% to obtain a filter cake, and drying the filter cake to obtain the nano porous calcium silicate.
6. The method for preparing the columnar particles capable of adsorbing and decomposing formaldehyde according to claim 5, wherein the seed crystal is activated alumina; wherein the mol ratio of the sodium silicate to the aluminum salt to the zinc salt to the water to the lime milk is 1: 0.05-0.1: 0.05-0.5: 100-300: 0.2 to 0.7; the addition amount of the seed crystal is 5-30% of the sum of the mass of the lime milk and the mass of the sodium silicate.
7. The method for preparing the columnar particles capable of adsorbing and decomposing formaldehyde according to claim 5, wherein the aluminum salt is sodium aluminate or/and aluminum sulfate; the zinc salt is zinc nitrate.
8. The method for preparing columnar particles capable of adsorbing and decomposing formaldehyde as claimed in claim 1, wherein the nanoporous calcium silicate has a particle size of 300 mesh and a specific surface area of 500-600m2Per g, porosity of 90-95%, pore volume of 0.5-0.8cm3/kg。
9. Columnar particles capable of adsorbing and decomposing formaldehyde, which are prepared by the method of any one of claims 1 to 8, wherein the particles are fluffy and porous structures and are loaded with potassium permanganate.
10. The use of the columnar particles capable of adsorbing and decomposing formaldehyde as claimed in claim 9, wherein the detection result of the detection result shows that the loading density is 0.36-0.45g/cm for the ethanol CADR value 280-360m for the air purification method.
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| CN202111304161.6A CN113967459A (en) | 2021-11-05 | 2021-11-05 | Columnar particles capable of adsorbing and decomposing formaldehyde and preparation method and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535072A (en) * | 1982-09-14 | 1985-08-13 | Nihon Sanso Kabushiki Kaisha | Absorbent for treating gases containing the materials used for semiconductor products and process of treating such gases with the same |
| CN104248942A (en) * | 2014-09-23 | 2014-12-31 | 江苏普瑞姆纳米科技有限公司 | Preparation method of harmful gas adsorbent |
| CN107469779A (en) * | 2017-10-12 | 2017-12-15 | 山东得盛新材料科技有限公司 | A kind of new pernicious gas adsorption particle and preparation method thereof |
| CN107697923A (en) * | 2017-09-29 | 2018-02-16 | 临沂三禾生物质科技有限公司 | A kind of synthesis high activity, the production method of Lower alrali content calcium silicates |
| CN108212075A (en) * | 2018-01-19 | 2018-06-29 | 临沂三禾生物质科技有限公司 | It is a kind of can efficient absorption and catalytic degradation formaldehyde novel porous nano material preparation method |
-
2021
- 2021-11-05 CN CN202111304161.6A patent/CN113967459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535072A (en) * | 1982-09-14 | 1985-08-13 | Nihon Sanso Kabushiki Kaisha | Absorbent for treating gases containing the materials used for semiconductor products and process of treating such gases with the same |
| CN104248942A (en) * | 2014-09-23 | 2014-12-31 | 江苏普瑞姆纳米科技有限公司 | Preparation method of harmful gas adsorbent |
| CN107697923A (en) * | 2017-09-29 | 2018-02-16 | 临沂三禾生物质科技有限公司 | A kind of synthesis high activity, the production method of Lower alrali content calcium silicates |
| CN107469779A (en) * | 2017-10-12 | 2017-12-15 | 山东得盛新材料科技有限公司 | A kind of new pernicious gas adsorption particle and preparation method thereof |
| CN108212075A (en) * | 2018-01-19 | 2018-06-29 | 临沂三禾生物质科技有限公司 | It is a kind of can efficient absorption and catalytic degradation formaldehyde novel porous nano material preparation method |
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