CN109317107B - Egg white clay composite formaldehyde purification material and preparation method thereof - Google Patents
Egg white clay composite formaldehyde purification material and preparation method thereof Download PDFInfo
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000000746 purification Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- QCVGEOXPDFCNHA-UHFFFAOYSA-N 5,5-dimethyl-2,4-dioxo-1,3-oxazolidine-3-carboxamide Chemical compound CC1(C)OC(=O)N(C(N)=O)C1=O QCVGEOXPDFCNHA-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 102000002322 Egg Proteins Human genes 0.000 title claims abstract description 14
- 108010000912 Egg Proteins Proteins 0.000 title claims abstract description 14
- 235000014103 egg white Nutrition 0.000 title claims abstract description 14
- 210000000969 egg white Anatomy 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004927 clay Substances 0.000 title claims abstract description 10
- 239000011022 opal Substances 0.000 claims abstract description 38
- 230000004048 modification Effects 0.000 claims abstract description 21
- 238000012986 modification Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000003607 modifier Substances 0.000 claims abstract description 9
- 125000003277 amino group Chemical group 0.000 claims abstract description 8
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002715 modification method Methods 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- 238000001035 drying Methods 0.000 claims description 14
- 235000019441 ethanol Nutrition 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 229910000077 silane Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
- 239000011707 mineral Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- 239000003463 adsorbent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012621 metal-organic framework Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 208000003174 Brain Neoplasms Diseases 0.000 description 1
- 208000014085 Chronic respiratory disease Diseases 0.000 description 1
- 206010009944 Colon cancer Diseases 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 208000002454 Nasopharyngeal Carcinoma Diseases 0.000 description 1
- 206010061306 Nasopharyngeal cancer Diseases 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 235000012216 bentonite Nutrition 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 208000029742 colonic neoplasm Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 201000011216 nasopharynx carcinoma Diseases 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- 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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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/11—Clays
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Abstract
The invention relates to an egg white clay composite formaldehyde purifying material and a preparation method thereof, belonging to the field of non-metallic mineral materials and environmental engineering. The invention takes the opal as a carrier and amino silane as a modifier, and adds amino groups on the surface of the opal by a surface grafting modification method to prepare the egg white clay composite formaldehyde purification material. The material utilizes the strong affinity of amino groups to formaldehyde, and increases the amino groups on the surface of the opal through grafting modification on the surface of the opal, so that the capturing performance of the obtained composite material to gas formaldehyde pollutants is greatly improved, and the problem of low formaldehyde adsorption and purification capacity of natural opal is solved; in addition, the required raw materials are cheap and easy to obtain, the preparation process is simple, the reaction conditions are mild, and the method has a great application value in the field of indoor formaldehyde gas purification.
Description
Technical Field
The invention relates to an egg white clay composite formaldehyde purifying material and a preparation method thereof, belonging to the field of non-metallic mineral materials and environmental engineering.
Background
The indoor gas pollutant in modern office, automobile and household is mainly formaldehyde which is colorless and has strong smell, has the characteristics of common pollution, long pollution time and the like, and is mainly from decorative materials, coatings, polymeric boards and adhesives in combined furniture, chemical fiber carpets and the like. Formaldehyde is a highly toxic substance that has been identified by the world health organization as a carcinogenic and teratogenic substance. The long-term formaldehyde exposure can cause chronic respiratory diseases, colon cancer, nasopharyngeal carcinoma, brain cancer and the like, and children and pregnant women are particularly sensitive to formaldehyde and are more harmful. At present, the methods for treating formaldehyde at home and abroad mainly comprise a photocatalyst technology, a high-voltage negative ion technology, an air negative ion technology, an acid-base neutralization method, a biochemical treatment method and an adsorption method. Among them, the former 5 methods have high energy consumption, easy to cause secondary pollution and high treatment cost; whereas adsorption is applicable to almost all volatile organic compounds. Common adsorbents include activated carbon, molecular sieves, metal organic framework Materials (MOFs), mesoporous alumina materials, porous ceramic materials, and the like. However, the above adsorbents have the disadvantages of complicated preparation process, high cost, low adsorption capacity and the like. Therefore, in order to solve the above problems, in recent years, many researchers at home and abroad have studied to adsorb formaldehyde gas by using natural porous minerals such as diatomaceous earth, kaolin, sepiolite, bentonite, and the like, which are abundant and cheap in reserves, as an adsorbent. The egg white soil is light shale with rich reserves, and has the characteristics of rich reserves, low price, good adsorbability, no toxicity, low density, stable chemical properties and the like. However, the natural opal has fewer functional groups on the surface, has poor affinity with formaldehyde, and has low formaldehyde saturation adsorption amount and purification efficiency.
In order to overcome the defects, the invention provides an egg white high-efficiency composite formaldehyde purification material which is prepared by using egg white as a carrier and amino silane as a modifier and adding amino groups on the surface of the egg white through a surface grafting modification method.
Disclosure of Invention
The preparation method and the process steps of the opal composite formaldehyde purification material are as follows:
(1) mixing absolute ethyl alcohol and pure water according to a mass ratio of 1:1 preparing an ethanol aqueous solution;
(2) mixing the protein soil powder according to the mass ratio of 1: 4-8, adding the mixture into the ethanol solution obtained in the step (1), and stirring and dispersing to prepare a suspension;
(3) and (3) adding an aminosilane solution hydrolyzed in advance into the suspension prepared in the step (2) for graft modification, wherein the dosage of silane is 6-36% of the mass of the opal, the modification temperature is 50-90 ℃, and the modification time is 1-5 h.
(4) Washing the reaction product obtained in the step (3) with ethanol and water, filtering, and drying at 60-100 ℃ for 8-12 h;
(5) grinding the dried product obtained in the step (4) until 97% of the dried product passes through a 200-mesh sieve. Thus obtaining the opal composite formaldehyde purification material.
The preparation method of the opal composite formaldehyde purification material is characterized by comprising the following steps: the used aminosilane is one or two of aminopropyltriethoxysilane, gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma- (2-aminoethyl) -aminopropyltrimethoxysilane; the opal powder has a particle size of 200 meshes and the balance of less than or equal to 3 percent.
The opal composite formaldehyde purification material prepared by the method and the process steps has rich amino on the surface, and the particle size is 200 meshes, and the balance is less than or equal to 3%.
According to the invention, the amino group has stronger affinity to formaldehyde, and the amino group on the surface of the opal is increased by grafting modification on the surface of the opal, so that the adsorption and capture performance of the opal powder material to gas formaldehyde pollutants is greatly improved, and the problem that natural opal has weaker formaldehyde purification capacity is solved; in addition, the required raw materials are cheap and easy to obtain, the preparation process is simple, the reaction conditions are mild, and the method has a great application value in the field of indoor formaldehyde gas purification.
Drawings
Fig. 1 is an XPS spectrum of the surface N1s of the opal material used in the present invention.
FIG. 2 is an XPS spectrum of N1s on the surface of the composite formaldehyde purification material prepared by using opal as a carrier.
FIG. 3 is a TG diagram of the opal raw material and the prepared composite formaldehyde purification material in the invention.
Detailed Description
The present invention will be further described with reference to the following examples. But not limiting, and any equivalent replacement in the field made in accordance with the teachings of the present invention is within the scope of the present invention.
Example 1:
the specific implementation steps are as follows:
(1) mixing absolute ethyl alcohol and pure water according to a mass ratio of 1:1 preparing an ethanol aqueous solution;
(2) mixing the protein soil powder according to the mass ratio of 1: 8, adding the mixture into the ethanol solution obtained in the step (1), and stirring and dispersing to prepare a suspension;
(3) and (3) adding an aminosilane solution hydrolyzed in advance into the suspension prepared in the step (2) for graft modification, wherein the dosage of the gamma-aminopropyltrimethoxysilane is 36 percent of the mass of the opal, the modification temperature is 90 ℃, and the modification time is 1 h.
(4) Washing the reaction product obtained in the step (3) with ethanol and water, filtering, and drying at 60 ℃ for 12 hours;
(5) grinding the dried product obtained in the step (4) until 97% of the dried product passes through a 200-mesh sieve. Thus obtaining the opal composite formaldehyde purification material.
XPS and TG patterns of the opal composite formaldehyde purification material prepared in example 1 are shown in attached figures 2 and 3. As can be seen from FIG. 2, the surface of the opal is increasedA large number of N-H bonds and N-C bonds, indicating that a large number of amino groups, in which small amounts of NH are present, were successfully grafted onto the surface of the opal4 +And N2The signal peaks of (a) are a small amount of ions introduced in the purification process of the opal and a small amount of nitrogen in the adsorbed air respectively. As can be seen from fig. 3, the mass of the modifier supported in the composite material was 3.31%.
Example 2:
the procedure was the same as in example 1, except that: in the step (2), the content of the opal powder is 1: 7, adding the mixture into the ethanol solution obtained in the step (1), stirring and dispersing; in the step (3), the consumption of the silane accounts for 27% of the mass of the opal, the modification temperature is 80 ℃, and the modification time is 2 hours; in the step (4), the drying temperature is 70 ℃, and the drying time is 11 h.
Example 3:
the procedure was the same as in example 1, except that: in the step (2), the content of the opal powder is 1: 6, adding the mixture into the ethanol solution obtained in the step (1), stirring and dispersing; in the step (3), the consumption of the silane accounts for 18% of the mass of the opal, the modification temperature is 70 ℃, and the modification time is 3 hours; in the step (4), the drying temperature is 80 ℃, and the drying time is 10 hours.
Example 4:
the procedure was the same as in example 1, except that: in the step (2), the content of the opal powder is 1: 5, adding the mixture into the ethanol solution obtained in the step (1), stirring and dispersing; in the step (3), the consumption of the silane accounts for 9% of the mass of the opal, the modification temperature is 60 ℃, and the modification time is 4 hours; in the step (4), the drying temperature is 90 ℃, and the drying time is 9 h.
Example 5:
the procedure was the same as in example 1, except that: in the step (2), the content of the opal powder is 1: 4, adding the mixture into the ethanol solution obtained in the step (1), stirring and dispersing; in the step (3), the consumption of the silane accounts for 6% of the mass of the opal, the modification temperature is 50 ℃, and the modification time is 5 hours; in the step (4), the drying temperature is 100 ℃, and the drying time is 8 hours.
Example 6:
the procedure was the same as in example 1, except that: in the step (3), the silane is aminopropyltriethoxysilane and gamma-aminopropyltrimethoxysilane which are compounded according to the ratio of 1:1, the modification temperature is 60 ℃, and the modification time is 2 hours; in the step (4), the drying temperature is 80 ℃, and the drying time is 10 hours.
The properties and parameters of the final products of examples 1 to 6 were measured and calculated according to the methods described below, and the results obtained are shown in Table 1.
The formaldehyde purification rate is measured by adopting a standard JC/T1074-2008 detection method of the building material industry of the people's republic of China, and the detection and analysis of the formaldehyde concentration are carried out by adopting an AHMT spectrophotometry according to GB/T16129. the brief process is as follows, 20g of the obtained protein-soil composite adsorbing material is coated on one surface of four glass plates (the thickness is 4 mm-6 mm) with the thickness of 500mm × 500mm, the drying is carried out for 24h under the conditions of the temperature (20 +/-2) DEG C and the relative humidity (50 +/-10)%, and then the experiment is carried out, and the dried sample is put into a container with the thickness of 1m3The test chamber is closed, then (3 +/-0.25) mu L of the analytically pure formaldehyde is taken by a micro injector and injected into the chamber through an injection hole, the chamber without the sample is also operated as a comparison chamber, and the gas in the chamber is collected and tested for concentration after being closed for 1h, wherein the concentration is the initial concentration (n)0). After 48h, the gas in the chamber was collected and tested for concentration, which was the final concentration (n)1)。
Starting concentration with control Chamber (n)0) And termination concentration (n)1) Comparing the natural attenuation condition of the formaldehyde, the natural attenuation of the formaldehyde is less than or equal to 30%, and the experiment is established. The natural attenuation rate is calculated according to equation (1):
R＝(n0-n1)/n0×100％ (1)
in the formula: r-natural decay Rate,%;
n0initial concentration of gas measured in milligrams per cubic meter (mg/m) in the control chamber3)；
n1-comparing the measured gas end concentration in milligrams per cubic meter (mg/m) of the gas measured in the chamber3)。
The formaldehyde purification efficiency r is calculated according to the formula (2):
r＝(n1-n1 1)/n1×100％ (2)
in the formula: r-formaldehyde purification rate,%;
n1-comparing the measured gas end concentration in milligrams per cubic meter (mg/m) of the gas measured in the chamber3)；
n1 1End of gas concentration measured in milligram per cubic meter (mg/m) for the test chamber3)。
And (3) calculating the loading capacity of the modifier, wherein the modifier cannot be completely grafted to the surface of the opal in the reaction process, and the actual loading capacity of the modifier is smaller than the theoretical value calculated according to the amount of the added modifier, so that the actual loading capacity of the modifier in the composite adsorption material is detected by adopting a METT L ERTGA/DSC 1SF/1382 thermogravimetric analyzer.
Table 1 formaldehyde purification efficiency and parameters of the materials obtained in examples 1 to 6 and the opal material
Claims (3)
1. A preparation method of an egg white clay composite formaldehyde purification material is characterized in that egg white clay is used as a carrier, amino silane is used as a modifier, and amino groups are added on the surface of the egg white clay by a surface grafting modification method, and the preparation method comprises the following process steps:
(1) mixing absolute ethyl alcohol and pure water according to a mass ratio of 1:1 preparing an ethanol aqueous solution;
(2) mixing the protein soil powder according to the mass ratio of 1: 4-8, adding the mixture into the ethanol solution obtained in the step (1), and stirring and dispersing to prepare a suspension;
(3) adding an aminosilane solution hydrolyzed in advance into the suspension prepared in the step (2) for graft modification, wherein the dosage of silane is 6-36% of the mass of the opal, the modification temperature is 50-90 ℃, and the modification time is 1-5 h;
(4) washing the reaction product obtained in the step (3) with ethanol and water, filtering, and drying at 60-100 ℃ for 8-12 h;
(5) grinding the dried product obtained in the step (4) until 97% of the dried product passes through a 200-mesh sieve. Thus obtaining the opal composite formaldehyde purification material.
2. The preparation method of the egg white clay composite formaldehyde purification material according to claim 1, characterized in that: the amino silane is one or two of aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, gamma-aminopropyl triethoxysilane and gamma- (2-aminoethyl) -aminopropyl trimethoxysilane.
3. The preparation method of the egg white clay composite formaldehyde purification material according to claim 1, characterized in that: the opal powder has a particle size of 200 meshes and the balance of less than or equal to 3 percent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811381505.1A CN109317107B (en) | 2018-11-19 | 2018-11-19 | Egg white clay composite formaldehyde purification material and preparation method thereof |
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| CN201811381505.1A CN109317107B (en) | 2018-11-19 | 2018-11-19 | Egg white clay composite formaldehyde purification material and preparation method thereof |
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| CN109317107A CN109317107A (en) | 2019-02-12 |
| CN109317107B true CN109317107B (en) | 2020-07-17 |
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| CN101613112A (en) * | 2009-07-06 | 2009-12-30 | 江南大学 | A kind of preparation of attapulgite modified by silane coupling agent |
| CN101658782A (en) * | 2009-08-24 | 2010-03-03 | 淮阴师范学院 | Method for preparing adsorbent by modifying attapulgite clay |
| CN104645800A (en) * | 2013-11-25 | 2015-05-27 | 北京市理化分析测试中心 | Formaldehyde catching agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101613112A (en) * | 2009-07-06 | 2009-12-30 | 江南大学 | A kind of preparation of attapulgite modified by silane coupling agent |
| CN101658782A (en) * | 2009-08-24 | 2010-03-03 | 淮阴师范学院 | Method for preparing adsorbent by modifying attapulgite clay |
| CN104645800A (en) * | 2013-11-25 | 2015-05-27 | 北京市理化分析测试中心 | Formaldehyde catching agent and preparation method thereof |
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