CN110115935A - A kind of preparation method of low concentration formaldehyde scavenging material - Google Patents
A kind of preparation method of low concentration formaldehyde scavenging material Download PDFInfo
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- CN110115935A CN110115935A CN201910514754.1A CN201910514754A CN110115935A CN 110115935 A CN110115935 A CN 110115935A CN 201910514754 A CN201910514754 A CN 201910514754A CN 110115935 A CN110115935 A CN 110115935A
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- 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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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The present invention provides a kind of preparation method of low concentration formaldehyde scavenging material, using step impregnation method, it takes a certain amount of high specific surface area porous material to be successively immersed in permanganate solution, strong base solution, chemisorption modifier solution and antimicrobial, low concentration formaldehyde scavenging material is both obtained after filtration drying.The present invention passes through in-situ regeneration MnO on the basis of conventional porous materials physical absorption2Increase alkali metal component on the surface of the material, increase effective Lacking oxygen of material, realizes the catalytic decomposition performance of scavenging material in certain circumstances.It is modified by carrying out chemisorption to pre-prepared scavenging material, improves the chemical adsorption capacity of material PARA FORMALDEHYDE PRILLS(91,95).By carrying out antimicrobial treatment to the material after chemisorption, realizes the environmental resistance degree of scavenging material, solve the problems, such as that current most of materials after prolonged use may microbiological contamination release peculiar smell.
Description
Technical field
The present invention relates to technical field of air purification, and in particular to a kind of preparation method of low concentration formaldehyde scavenging material.
Background technique
Formaldehyde is up to 15 years as the Typical Representative in indoor gaseous pollutant, deenergized period, has strong impulse,
Respiratory system, central nervous system, immune system, digestive system, hematological system, kidney and liver can be damaged after a large amount of suckings
Deng, or even chromosome mutation can be caused, cause the various cancers such as nasal cavity, oral cavity, nasopharynx, throat, skin and alimentary canal.
The country is unfolded for the purification techniques of formaldehyde from following two angle, first is that the control of Form aldehyde release pollution sources, two
It is the end purification of release formaldehyde.The control in Formaldehyde Pollution of Indoor Air source requires people in schedule life using environmentally protective
Building materials reduce depth finishing to the greatest extent and using the daily necessities for being free of formaldehyde.
The end purification techniques of formaldehyde has combustion method, physisorphtion, chemical oxidization method, chemiadsorption, photocatalytic-oxidation
Change method and plasma for purification method.Combustion method refers to using high thermal technology, makes formaldehyde through aoxidizing by existing fuel combustion heat supply
The carbon dioxide and water of environmental sound are generated, its main feature is that purification is sufficiently, it is without secondary pollution, but energy consumption is higher, is not suitable for the people
With;Physisorphtion refers to using porous structure materials such as active carbon, molecular sieves as absorption carrier, passes through containing formaldehyde gas
When, part formaldehyde, because Van der Waals force is combined together, reduces content of formaldehyde in exhaust gas as adsorbate and active carbon pore structure,
Feature is adsorption efficiency height, but the service life is shorter, and easily secondary is distributed as pollution sources when being saturated since Van der Waals force bonding is weaker;
Chemical oxidization method, which refers to, to be reacted using high oxidation type chemicals (such as potassium permanganate, chlorine dioxide, hydrogen peroxide) with formaldehyde,
Oxidize the formaldehyde into CO2And H2O, its main feature is that reaction speed is fast, but the volatile formation secondary pollution of chemical reagent itself.
Chemiadsorption refers to be improved on the basis of conventional physical absorption method, is carried out to porous materials such as active carbons pre-
It is modified, improve its duct and surface functional group, when passing through containing formaldehyde gas, the Van der Waals force between formaldehyde and duct upgrades to
Chemical bond, its main feature is that adsorption efficiency is high, speed is fast, and bonding fastness is stronger, but does not go deep into still to the research of modifying agent at present.
As patent CN107159135A discloses a kind of modified active for being modified removing indoor formaldehyde to active carbon using amino acid
Carbon Materials first pass through active carbon being impregnated in ZnCl2And CaCl2Impregnation drying in the mixed solution of solution, and at 200-400 DEG C
Lower calcining 1-3 hours then removes Zn and Ca ion, and final impregnating is dry to be made in amino acid solution.This product work
Skill complexity more particularly to high-temperature calcination, it is difficult to large-scale application.Patent CN109078477A discloses a kind of hydroxy-amino-acid and removes
Purifying formaldehyde material and preparation method thereof, by selecting porous adsorbing material as carrier, by the weight of hydroxy-amino-acid and water
Hydroxyl amino aqueous acid is obtained than weighing after hydroxy-amino-acid is dissolved in water stirring for 0.03:1~0.3:1;By the porous carrier
It is placed in vacuum impregnation tank, is vacuumized after sealing vacuum impregnation tank, utilize hydroxyl amino aqueous acid described in vacuum suck, vacuum
Drying is made after dipping.This Product Process is simple, but technology is single in practical applications, and is used for a long time due to amino acid richness
Nutrient laden can be such that the bacterium adsorbed on the surface of the material quickly breeds, and cause peculiar smell.
Photocatalytic oxidation refers to be chemically reacted under the action of light, is carbon dioxide and water, mesh by Degradation Formaldehyde
The most photochemical catalyst of preceding application is titanium dioxide, but the light source that photocatalysis generally uses is ultraviolet light, expensive, the service life compared with
It is short, it is unfavorable for extensive civilian;Catalytic oxidation is oxidant using the oxygen in air, will under the existence condition of catalyst
Formaldehyde is converted into CO2And H2O, its main feature is that lasting a long time, but higher cost.Plasma method refers to the process of in high-frequency discharge
Middle moment generates high-energy, and the chemical bond for opening pernicious gas molecule is allowed to be decomposed into atom or harmless molecule, its main feature is that nothing
Material consumption can be used for a long time, but electrion during can generate other gaseous materials such as ozone and nitrogen oxides formed it is secondary
Pollution.
Based on background above research, physical absorption, chemisorption and catalysis oxidation means are used by joint, to traditional object
The porous carrier (such as active carbon) managed in absorption method carries out chemical modification, after modification selective supported catalyst on material,
And it is subject to antimicrobial treatment, low concentration formaldehyde purification material under a kind of suitable room temperature is made, and promote it in existing air cleaning
Application in system improves indoor air quality, has significant social benefit and meaning.
Summary of the invention
The object of the invention is that overcome purifying formaldehyde material lifetime in the prior art short or use in easily there is lacking for peculiar smell
It falls into, a kind of combine at room temperature using low concentration in physical absorption, chemisorption and catalytic decomposition principle removal room air is provided
The purifying formaldehyde material of formaldehyde and its apply means.
To achieve the above object, present invention provide the technical scheme that
A kind of preparation method of low concentration formaldehyde scavenging material, is prepared using step impregnation method, comprising the following steps:
Step 1: taking a certain amount of high specific surface area porous material is carrier, by the carrier impregnation in permanganate solution, then
Filtering, dry 5-10h obtains composite A at 60-100 DEG C;Wherein, it calculates by quality ratio, porous material and permanganate
Ratio be 100:(0.5-5);
Step 2: the composite A that step 1 is prepared is immersed in strong base solution, is then filtered, at 60-100 DEG C
Dry 5-10h obtains composite material B;Wherein, the concentration of the strong base solution is 1-6 mol/L;
Step 3: the composite material B that step 2 is prepared is immersed in chemisorption modifier solution, then filtering,
Dry 5-10h obtains composite material C at 60-100 DEG C;Wherein, it calculates by quality ratio, composite material B and chemisorption modifying agent
Ratio be 100:(1-10);
Step 4: by the composite material C that step 3 obtains be immersed in pH value be 7-9 antimicrobial in, then filtering,
Dry 5-10h obtains low concentration formaldehyde scavenging material at 60-100 DEG C;Wherein, it calculates by quality ratio, composite material C and antibacterial agent
Ratio be 100:(0.1-0.5).
Further, the step 1 is into step 4, and the dipping temperature of each step is 10-80 DEG C, and dip time is
0.1-1h。
Further, the form of high specific surface area porous material described in step 1 be graininess, column, honeycomb,
Any one of spherical shape.
Further, the high specific surface area porous material is that specific surface area is greater than 1200 m2The cocoanut active charcoal of/g, fruit
Any one of shell active carbon, coaly activated carbon or specific surface area are greater than 600 m2In the X-type molecular sieve of/g, Y type molecular sieve
It is any.
Further, permanganate described in step 1 is potassium permanganate or sodium permanganate.
Further, strong base solution solute described in step 2 is sodium hydroxide or potassium hydroxide.
Further, chemisorption modifying agent described in step 3 is fast reaction modifying agent and long-life reaction modifying
Agent 1:1 in mass ratio mixing composition;Wherein, fast reaction modifying agent is any one of lysine, histidine, tryptophan;It is long
Service life modifying agent is any one of polyacrylonitrile, polyaniline, pyridine.
Further, antibacterial agent described in step 4 is hexamethylene, polyhexamethylene list guanidine salt
Hydrochlorate, polyhexamethylene list guanidine phosphate, polyoxy alkylene guanidine hydrochloride, dodecyl benzyl dimethyl ammonium chloride, double alkyl
Any one of double decyl dimethyl ammonium bromides of double-track suspended self-propelled conveyor, double alkyl.
Another aspect of the present invention also protects a kind of low concentration formaldehyde scavenging material.The material is carried out by way of heating
Regeneration;Wherein, heating power is 2000-2200W, heating time 5-10min.
The present invention provides a kind of combine at room temperature using physical absorption, chemisorption and catalytic decomposition principle removal Interior Space
The preparation method of the purifying formaldehyde material of low concentration formaldehyde passes through original on the basis of conventional porous materials physical absorption in gas
Position regeneration MnO2Increase alkali metal component on the surface of the material, increase effective Lacking oxygen of material, realizes scavenging material specific
Catalytic decomposition performance under environment.It is modified by carrying out chemisorption to pre-prepared scavenging material, improves material PARA FORMALDEHYDE PRILLS(91,95)
Chemical adsorption capacity.By carrying out antimicrobial treatment to the material after chemisorption, realizes the environmental resistance degree of scavenging material, solve
Current most of materials after prolonged use may microbiological contamination release peculiar smell the problem of.
The beneficial effects of the present invention are:
(1) heretofore described chemisorption modifying agent joint uses fast reaction modifying agent and long-life reaction modifier
It mixes, the alkaline nitrogenous material that fast reaction modifying agent selects hydrophobic performance good realizes the quick richness to high-concentration formaldehyde
Collection, the polymer material that long-life reaction modifier selects nitrogen content high are big from 1mg/g by the formaldehyde absorbing capacity of traditional material
Width is increased to 10 mg/g or more;
(2) scavenging material prepared by the present invention is handled using highly basic, and formaldehyde adsorption is easily converted into formic acid or formic acid on the surface of the material
Salt can realize quality rebuilding at a temperature of household electric blower, and 3 times of left sides can be improved in the service life of traditional purifying formaldehyde material
It is right.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
A kind of preparation method of low concentration formaldehyde scavenging material, is prepared using step impregnation method, comprising the following steps:
Step 1: take a certain amount of high specific surface area porous material be carrier, 10-80 DEG C at a temperature of by the carrier impregnation in height
Then 0.1-1h in manganate solution is filtered, dry 5-10h obtains composite A at 60-100 DEG C;Wherein, with mass ratio
It calculates, the ratio of porous material and permanganate is 100:(0.5-5);The form of the high specific surface area porous material is
One of granular, column, honeycomb, spherical shape, preferably specific surface area are greater than 1200 m2Coconut husk, shell, coal quality of/g etc. are living
Property one of charcoal or specific surface area be greater than 600 m2One of molecular sieves such as X-type, the Y type of/g;The permanganate is
Potassium permanganate or sodium permanganate, preferably potassium permanganate.
Step 2: it is immersed in strong base solution in 10-80 DEG C of at a temperature of composite A that step 1 is prepared
Then 0.1-1h is filtered, dry 5-10h obtains composite material B at 60-100 DEG C;Wherein, the concentration of the strong base solution is
1-6 mol/L;The strong base solution solute is sodium hydroxide or potassium hydroxide, preferably sodium hydroxide.
Step 3: the composite material B that step 2 is prepared at 10-80 DEG C is immersed in chemisorption modifier solution
Then 0.1-1h is filtered, dry 5-10h obtains composite material C at 60-100 DEG C;Wherein, it calculates by quality ratio, composite material
The ratio of B and chemisorption modifying agent is 100:(1-10);The chemisorption modifying agent is fast reaction modifying agent and length
Service life reaction modifier 1:1 in mass ratio mixing composition;Wherein, fast reaction modifying agent is lysine, in histidine, tryptophan
It is any;Long-life modifying agent is any one of polyacrylonitrile, polyaniline, pyridine.Lysine, histidine, the color of use
Propylhomoserin etc. is typical hydrophobicity, basic amino acid, and isoelectric point is higher, is had with the stronger reactivity of formaldehyde, it can be achieved that fast
The purpose of formaldehyde is gone in speed reaction, and polyacrylonitrile, polyaniline, the pyridine of use are that nitrogen content is larger, can be in the longer time period
It is reacted with formaldehyde, the service life of composite material can be effectively improved.
Step 4: the composite material C for obtaining step 3 at 10-80 DEG C is immersed in the antimicrobial that pH value is 7-9
Then 0.1-1h is filtered, dry 5-10h obtains low concentration formaldehyde scavenging material at 60-100 DEG C;Wherein, by quality ratio
It calculates, the ratio of composite material C and antibacterial agent is 100:(0.1-0.5);The antibacterial agent is preferably cosmocil stearate
Hydrochlorate, polyhexamethylene list guanidine hydrochloride, polyhexamethylene list guanidine phosphate, polyoxy alkylene guanidine hydrochloride, dodecyl two
Any one of double decyl dimethyl ammonium bromides of methylbenzyl ammonium chloride, double alkyl double-track suspended self-propelled conveyors, double alkyl.Institute
It is colourless, odorless, nontoxic, non-corrosive to state fungicide;It is non-ignitable, not quick-fried, using safe;With wide sterilization spectrum, effective concentration is low, makees
With speed is fast, the antibacterial time is long;Its property is stable, soluble easily in water, can use at normal temperature, convenient for preparation and long-term storage.
Embodiment 1
Step 1: weighing 1000 g graininess cocos active carbons is carrier, is immersed in using equivalent impregnation method containing 10 g high
In the liquor potassic permanganate of potassium manganate, 30min is impregnated at 60 DEG C, is then filtered juxtaposition and is done at 80 DEG C in a vacuum drying oven
Dry 6h, obtains composite A;
Step 2: configuration concentration is the sodium hydroxide solution of 1 mol/L, and composite A is immersed in hydroxide at 40 DEG C
Then 20min in sodium solution filters the juxtaposition dry 6h at 80 DEG C in a vacuum drying oven, obtains composite material B;
Composite material B: being immersed in the mixed solution of 6 g tryptophans and 6 g polyacrylonitrile by step 3 using equivalent impregnation method,
30min is impregnated at 60 DEG C, is then filtered the juxtaposition dry 6h at 80 DEG C in a vacuum drying oven, is obtained composite material C;
Step 4: composite material C is immersed in the hexamethylene solution that pH value is 8, is impregnated at 60 DEG C
30min is calculated by quality ratio, and the ratio of composite material C and hexamethylene is 100:0.1;Then it filters simultaneously
It is placed in a vacuum drying oven at 80 DEG C dry 6h, obtains low concentration formaldehyde scavenging material;
Step 5: 500 g of purifying formaldehyde material prepared by step 4 is seated in amplifier case and obtains room temperature except formaldehyde filters
Device, it is 500m that filter, which is placed in air quantity,3In the air cleaning facility of/h, by GB/T 18801-2015 standard in 30m3Laboratory Module is surveyed
Examination, initial concentration of formaldehyde 1.02mg/m3, FCADR value is 403m3/ h, is subsequently placed under domestic environment, continuous service 1000h
Free from extraneous odour.
Comparative example 1
Step 1: weighing 1000 g graininess cocos active carbons is carrier, is immersed in using equivalent impregnation method containing 10 g high
In the liquor potassic permanganate of potassium manganate, 30min is impregnated at 60 DEG C, is then filtered juxtaposition and is done at 80 DEG C in a vacuum drying oven
Dry 6h, obtains composite A;
Step 2: configuration concentration is the sodium hydroxide solution of 1 mol/L, and composite A is immersed in hydroxide at 40 DEG C
Then 20min in sodium solution filters the juxtaposition dry 6h at 80 DEG C in a vacuum drying oven, obtains composite material B;
Composite material B: being immersed in the mixed solution of 6 g tryptophans and 6 g polyacrylonitrile by step 3 using equivalent impregnation method,
30min is impregnated at 60 DEG C, is then filtered the juxtaposition dry 6h at 80 DEG C in a vacuum drying oven, is obtained low concentration formaldehyde purification
Material;
Step 4: 500 g of purifying formaldehyde material prepared by step 3 is seated in amplifier case and obtains room temperature except formaldehyde filters
Device, it is 500m that filter, which is placed in air quantity,3In the air cleaning facility of/h, by GB/T 18801-2015 standard in 30m3Laboratory Module is surveyed
Examination, initial concentration of formaldehyde 1.03mg/m3, FCADR value is 399m3/ h, is subsequently placed under domestic environment, continuous service 200h
There is pungent peculiar smell.
Embodiment 2
Step 1: weighing 1000 g coal quality honeycomb activated carbon is carrier, is immersed in permanganic acid containing 20g using equivalent impregnation method
In the liquor potassic permanganate of potassium, 50min is impregnated at 40 DEG C, and it is dry at 90 DEG C in a vacuum drying oven then to filter juxtaposition
5h obtains composite A;
Step 2: configuration concentration is the potassium hydroxide solution of 2 mol/Ls, and composite A is immersed in hydroxide at 30 DEG C
Then 10min in potassium solution filters the juxtaposition dry 5h at 90 DEG C in a vacuum drying oven, obtains composite material B;
Composite material B: being immersed in the mixed solution of 7 g lysines and 7g polyaniline by step 3 using equivalent impregnation method,
50min is impregnated at 40 DEG C, is then filtered the juxtaposition dry 5h at 90 DEG C in a vacuum drying oven, is obtained composite material C;
Step 4: composite material C is immersed in the dodecyl benzyl dimethyl ammonium chloride solution that pH value is 9, at 40 DEG C
50min is impregnated, is calculated by quality ratio, the ratio of composite material C and hexamethylene is 100:0.5;Then it crosses
The juxtaposition dry 5h at 90 DEG C in a vacuum drying oven is filtered, low concentration formaldehyde scavenging material is obtained;
Step 5: 500 g of purifying formaldehyde material prepared by step 4 is seated in amplifier case and obtains room temperature except formaldehyde filters
Device, it is 500m that filter, which is placed in air quantity,3In the air cleaning facility of/h, by GB/T 18801-2015 standard in 30m3Laboratory Module is surveyed
Examination, initial concentration of formaldehyde 0.99mg/m3, FCADR value is 421m3/ h, is subsequently placed under domestic environment, continuous service 1000h
Free from extraneous odour.
Comparative example 2
Step 1: weighing 1000 g coal quality honeycomb activated carbon is carrier, is immersed in using equivalent impregnation method containing 20 g Gao Meng
In the liquor potassic permanganate of sour potassium, 50min is impregnated at 40 DEG C, and it is dry at 90 DEG C in a vacuum drying oven then to filter juxtaposition
5h obtains composite A;
Step 2: configuration concentration is the potassium hydroxide solution of 2 mol/Ls, and composite A is immersed in hydroxide at 30 DEG C
Then 10min in potassium solution filters the juxtaposition dry 5h at 90 DEG C in a vacuum drying oven, obtains composite material B;.
Step 3: composite material B is immersed in the mixed solution of 7 g lysines and 7g polyaniline using equivalent impregnation method
In, 50min is impregnated at 40 DEG C, is then filtered the juxtaposition dry 5h at 90 DEG C in a vacuum drying oven, is obtained low concentration formaldehyde
Scavenging material;
Step 4: 500 g of purifying formaldehyde material prepared by step 3 is seated in amplifier case and obtains room temperature except formaldehyde filters
Device, it is 500m that filter, which is placed in air quantity,3In the air cleaning facility of/h, by GB/T 18801-2015 standard in 30m3Laboratory Module is surveyed
Examination, initial concentration of formaldehyde 0.92mg/m3, FCADR value is 429m3/ h, is subsequently placed under domestic environment, continuous service 300h
There is pungent peculiar smell.
Embodiment 3
Step 1: weighing 1000g X-type molecular sieve is carrier, is immersed in using equivalent impregnation method containing 15 g sodium permanganates
In sodium permanganate solution, 20min is impregnated at 80 DEG C, is then filtered the juxtaposition dry 8h at 60 DEG C in a vacuum drying oven, is obtained
To composite A;
Step 2: configuration concentration is the potassium hydroxide solution of 3 mol/Ls, and composite A is immersed in hydroxide at 50 DEG C
Then 30min in potassium solution filters the juxtaposition dry 8h at 60 DEG C in a vacuum drying oven, obtains composite material B;
Composite material B: being immersed in the mixed solution of 8 g lysines and 8 g polyanilines by step 3 using equivalent impregnation method,
20min is impregnated at 80 DEG C, is then filtered the juxtaposition dry 8h at 60 DEG C in a vacuum drying oven, is obtained composite material C;
Step 4: composite material C is immersed in the polyoxy alkylene guanidine hydrochloride solution that pH value is 8.5, is impregnated at 80 DEG C
20min is calculated by quality ratio, and the ratio of composite material C and polyoxy alkylene guanidine hydrochloride is 100:0.2;Then juxtaposition is filtered
The dry 8h at 60 DEG C in a vacuum drying oven, obtains low concentration formaldehyde scavenging material;
Step 5: 500 g of purifying formaldehyde material prepared by step 4 is seated in amplifier case and obtains room temperature except formaldehyde filters
Device, it is 500m that filter, which is placed in air quantity,3In the air cleaning facility of/h, by GB/T 18801-2015 standard in 30m3Laboratory Module is surveyed
Examination, initial concentration of formaldehyde 1.11mg/m3, FCADR value is 401m3/ h, is subsequently placed under domestic environment, continuous service 3000h
Free from extraneous odour.
Step 6: the air cleaning facility after step 5 to be run to 300 h, by GB/T 18801-2015 standard in 30m3
Laboratory Module test, initial concentration of formaldehyde 1.08mg/m3, FCADR value is 71m3/ h takes out filter, using household electric blower pair
The each position of filter is heated 5 minutes under 2200W power, is then again loaded into air cleaning facility by the above standard testing,
Initial concentration of formaldehyde is 0.88mg/m3, FCADR value is 331 m3/h.It can be seen that performance reaches its initial performance after regeneration
80% or more.
To sum up, by the result of embodiment 1-3 it is found that carrying out air using low concentration formaldehyde scavenging material prepared by the present invention
When purification, higher purifying formaldehyde Clean air delivery rate can achieve, the combination of two-component chemical adsorbent and Antibacterial accessory ingredient can have
Effect improves the service life of composite material and inhibits the generation of peculiar smell, and the test result of comparative example also indicates that, in no Antibacterial accessory ingredient
Under the material practical application scene of processing step, pungent peculiar smell will soon occur, the large-scale promotion for being unfavorable for material makes
With.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (10)
1. a kind of preparation method of low concentration formaldehyde scavenging material, which is characterized in that prepared using step impregnation method, including following
Step:
Step 1: taking a certain amount of high specific surface area porous material is carrier, by the carrier impregnation in permanganate solution, then
Filtering, dry 5-10h obtains composite A at 60-100 DEG C;Wherein, it calculates by quality ratio, porous material and permanganate
Ratio be 100:(0.5-5);
Step 2: the composite A that step 1 is prepared is immersed in strong base solution, is then filtered, at 60-100 DEG C
Dry 5-10h obtains composite material B;Wherein, the concentration of the strong base solution is 1-6 mol/L;
Step 3: the composite material B that step 2 is prepared is immersed in chemisorption modifier solution, then filtering,
Dry 5-10h obtains composite material C at 60-100 DEG C;Wherein, it calculates by quality ratio, composite material B and chemisorption modifying agent
Ratio be 100:(1-10);
Step 4: by the composite material C that step 3 obtains be immersed in pH value be 7-9 antimicrobial in, then filtering,
Dry 5-10h obtains low concentration formaldehyde scavenging material at 60-100 DEG C;Wherein, it calculates by quality ratio, composite material C and antibacterial agent
Ratio be 100:(0.1-0.5).
2. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: the step
One into step 4, and the dipping temperature of each step is 10-80 DEG C, dip time 0.1-1h.
3. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: in step 1
The form of the high specific surface area porous material is any one of graininess, column, honeycomb, spherical shape.
4. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 3, it is characterised in that: the high ratio
Surface area porous material is that specific surface area is greater than 1200 m2The cocoanut active charcoal of/g, active fruit shell carbon, appointing in coaly activated carbon
One kind or specific surface area are greater than 600 m2Any one of the X-type molecular sieve of/g, Y type molecular sieve.
5. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: in step 1
The permanganate is potassium permanganate or sodium permanganate.
6. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: in step 2
The strong base solution solute is sodium hydroxide or potassium hydroxide.
7. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: in step 3
The chemisorption modifying agent is fast reaction modifying agent and long-life reaction modifier 1:1 in mass ratio mixing composition;Its
In, fast reaction modifying agent is any one of lysine, histidine, tryptophan;Long-life modifying agent is polyacrylonitrile, polyphenyl
Any one of amine, pyridine.
8. a kind of preparation method of low concentration formaldehyde scavenging material according to claim 1, it is characterised in that: in step 4
The antibacterial agent be hexamethylene, polyhexamethylene list guanidine hydrochloride, polyhexamethylene list guanidine phosphate,
Polyoxy alkylene guanidine hydrochloride, dodecyl benzyl dimethyl ammonium chloride, double alkyl double-track suspended self-propelled conveyors, double alkyl are double
Any one of decyl dimethyl ammonium bromide.
9. a kind of low concentration formaldehyde scavenging material, which is characterized in that be prepared by the described in any item methods of claim 1-8
It arrives.
10. a kind of low concentration formaldehyde scavenging material according to claim 9, it is characterised in that: the material passes through heating
Mode regenerated;Wherein, heating power is 2000-2200W, heating time 5-10min.
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CN110627080A (en) * | 2019-10-22 | 2019-12-31 | 天长市润源催化剂有限公司 | Molecular sieve for digesting formaldehyde and preparation method thereof |
CN111203078A (en) * | 2020-02-18 | 2020-05-29 | 南京迪天高新产业技术研究院有限公司 | Composite amino acid type formaldehyde scavenger and preparation method thereof |
CN114308016A (en) * | 2020-10-26 | 2022-04-12 | 广东邦固薄膜涂料创新研究院有限公司 | Manganese dioxide/tourmaline composite catalyst for room-temperature antibiosis and formaldehyde removal and preparation method thereof |
CN115143580A (en) * | 2022-06-29 | 2022-10-04 | 深圳市中航大记环境技术有限公司 | Formaldehyde removal filter material, preparation method and air purifier |
CN115845876A (en) * | 2022-12-26 | 2023-03-28 | 山东科技大学 | Method for inactivating and regenerating layered manganese dioxide catalyst for degrading formaldehyde at room temperature |
CN116371394A (en) * | 2022-12-01 | 2023-07-04 | 南宁师范大学 | Catalytic modified formaldehyde purification material and preparation method thereof |
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CN115845876A (en) * | 2022-12-26 | 2023-03-28 | 山东科技大学 | Method for inactivating and regenerating layered manganese dioxide catalyst for degrading formaldehyde at room temperature |
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