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 PDF

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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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low concentration
scavenging material
concentration formaldehyde
preparation
formaldehyde scavenging
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CN110115935B (en
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邹巍巍
毕军
丁长春
梁红超
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Nanjing Yangtze River Delta Green Development Research Institute Co Ltd
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Nanjing Yangtze River Delta Green Development Research Institute Co Ltd
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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
    • 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
    • B01D53/81—Solid phase processes
    • 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
    • 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
    • B01D2253/102—Carbon
    • 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
    • B01D2253/116—Molecular sieves other than zeolites

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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

A kind of preparation method of low concentration formaldehyde scavenging material
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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