CN103041767B - Preparation method of indicating formaldehyde adsorbent - Google Patents
Preparation method of indicating formaldehyde adsorbent Download PDFInfo
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- CN103041767B CN103041767B CN201310002023.1A CN201310002023A CN103041767B CN 103041767 B CN103041767 B CN 103041767B CN 201310002023 A CN201310002023 A CN 201310002023A CN 103041767 B CN103041767 B CN 103041767B
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Abstract
The invention discloses a preparation method of an indicating formaldehyde adsorbent. The method comprises the steps that (1) magnesium hydroxide and boehmite are mixed uniformly at a molar ratio of (1-5):1; an adhesive agent with weight of 10-30% of total weight of magnesium hydroxide and boehmite, and water are added; uniform mixing is conducted for standby; (2) a mixture obtained from Step (1) is extruded and formed by a banded extruder; cylindrical particles with diameters of 0.8-3mm are obtained and then dried; and (3) the particles obtained from Step (2) are immersed in a 1wt%-3wt% permanganate aqueous solution for 1.5-3h, and dried to form the indicating formaldehyde adsorbent. The formaldehyde adsorbent prepared by the method can rapidly and efficiently remove formaldehyde with lower concentration in air, and the service life of the formaldehyde adsorbent can be indicated through variations of material colors. In addition, the technology is simple, and the cost is low.
Description
Technical field
The present invention relates to a kind of preparation method of formaldehyde adsorbent.
Background technology
Along with expanding economy, house fitting also more and more comes to be particular about, and pollution of indoor environment becomes increasingly conspicuous, and is detrimental to health.Formaldehyde is one main in indoor pollutant, and Long Term Contact can cause the symptoms such as dizziness, headache, weak, failure of memory, and formaldehyde is considered to one of carcinogen, and Long Term Contact can increase the possibility of suffers from cancer.Relating to indoor formaldehyde permitting deformation in " indoor environmental quality standard " is 0.1mg/m3, but FASHIONHOME is fitted up concentration of formaldehyde in 5 ~ October and is still exceeded this standard, and indoor floor, formaldehyde in furniture can sustained release 3 ~ 5 years even longer time, human health is constituted a threat to.
Along with the raising that people require habitation environment quality, various environmental friendly material and air purifier start to occur, purifying formaldehyde material also occurs in succession.Formaldehyde adsorbent, photocatalysis material of titanium dioxide and the noble metal catalyst of the mainly similar active carbon of formaldehyde absorbing product in the market.Active carbon adsorption material PARA FORMALDEHYDE PRILLS(91,95) has certain clean-up effect, but the shortcoming of formaldehyde desorption under there is hot conditions; For photocatalysis material of titanium dioxide and noble metal catalyst, although its clean-up effect is higher, expensive by the restriction of illumination condition; And for above-mentioned different materials, user can not judge that whether the scavenging material life-span is totally to change in time intuitively.
Chinese invention patent ZL200710306025.4 discloses a kind of colour development methyl aldehyde adsorption material, adopt the polyethylene polyamine polymer of finite concentration molecular weight 8000 and the obtained formolite reaction agent of polyethylene glycol mixing, then appropriate betanaphthol indicator is added wherein, finally mixed solution is sprayed at fan-fold paper mass filter surface, in this material, reagent all adopts organic matter, volatilization is had to produce the possibility of secondary pollution, this material only shows the extent of reaction of formaldehyde in addition, can not indicate the life-span of material.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of and indicate material lifetime and the preparation method of the formaldehyde adsorbent of non-secondary pollution.
For solving above technical problem, the present invention takes following technical scheme:
A preparation method for indicator type formaldehyde adsorbent, it comprises the steps:
(1), be that 1 ~ 5:1 mixes in molar ratio by magnesium hydroxide and monohydrate alumina, add binding agent, water that weight is 10% ~ 30% of magnesium hydroxide and monohydrate alumina gross weight, mix, for subsequent use;
(2), by step (1) gained mixture by banded extruder extrusion molding, obtain the cylindrical pellet that diameter is 0.8 ~ 3mm, then particle is dried;
(3), by step (2) gained impregnated with particles in the permanganate water solution of 1wt% ~ 3wt%, dipping 1.5 ~ 3h, dries, obtains indicator type formaldehyde adsorbent.
Further, in step (1), the mol ratio of magnesium hydroxide and monohydrate alumina is preferably 2 ~ 3:1.
In step (1), described binding agent can and one or more the mixture be preferably selected from recessed soil, kaolin and bentonite.
In step (2), the preferable temperature of described oven dry is 100 DEG C ~ 120 DEG C.Oven dry to moisture content is less than 5%.The length of cylindrical pellet can be such as 6 ~ 10mm.
Preferably, in step (3), described permanganate is preferably potassium permanganate, sodium permanganate or the combination of the two.The oven dry of step (3) is preferably carried out in potassium permanganate dryer.The temperature of drying is preferably 80 DEG C ~ 90 DEG C.
The invention still further relates to a kind of preparation method by above-mentioned indicator type formaldehyde adsorbent and prepare gained indicator type formaldehyde adsorbent, when it is within service life, color is aubergine; After exceeding service life, color becomes light yellow.
According to the present invention, the 1h formaldehyde clearance of described indicator type formaldehyde adsorbent within service life higher than 55%, more preferably, higher than 60%.
Due to the enforcement of above technical scheme, the present invention compared with prior art tool has the following advantages:
Gained formaldehyde adsorbent of the present invention can not only remove the formaldehyde of low concentration in air quickly and efficiently, and also indicates its service life by the change of material color simultaneously.In addition, present invention process is simple, cost is low.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described in detail, but the invention is not restricted to following examples.
Embodiment 1
The present embodiment provides a kind of indicator type formaldehyde adsorbent, and it prepares as follows:
(1), be that 2:1 mixes by magnesium hydroxide and monohydrate alumina mol ratio, add recessed soil, appropriate water that weight is 10% of magnesium hydroxide and monohydrate alumina gross weight, mix, for subsequent use;
(2), by the mixture of step (1) by banded extruder extrusion molding, obtain that diameter is 0.8mm, length is the cylindrical pellet of 6mm, under then particle being placed in 110 DEG C of conditions, dry (water content is lower than 5%);
(3) the potassium permanganate dipping solution of 1wt%, is prepared, with the particle that obtained solution impregnation step (2) is dried, dipping temperature is normal temperature, dip time 2h, finally adopting potassium permanganate dryer by flooding the particle flash baking (bake out temperature is 85 DEG C) obtained, obtaining aubergine indicator type formaldehyde adsorbent.
Embodiment 2
The present embodiment provides a kind of indicator type formaldehyde adsorbent, and it prepares as follows:
(1), by magnesium hydroxide with monohydrate alumina in molar ratio for 3:1 mixes, add bentonite, appropriate water that weight is 30% of magnesium hydroxide and monohydrate alumina gross weight, mix, for subsequent use;
(2), by the mixture of step (1) by banded extruder extrusion molding, obtain that diameter is 3mm, length is the cylindrical pellet of 8mm, under then particle being placed in 110 DEG C of conditions, dry (water content is lower than 5%);
(3) the sodium permanganate dipping solution of 3wt% is prepared, with the particle that obtained solution impregnation step (2) is dried, dipping 1.5h, finally adopting potassium permanganate dryer by flooding the particle flash baking (bake out temperature is 90 DEG C) obtained, obtaining aubergine indicator type formaldehyde adsorbent.
The formaldehyde clearance of indicator type formaldehyde adsorbent prepared by the method according to above-described embodiment 1 and 2 is detected, method is as follows: get formaldehyde adsorbent 60g to be measured, put into the filter screen being of a size of 200*200*8mm, and heat paraformaldehyde in glass cabin, make concentration of formaldehyde in cabin be 2.0mg/m
3, then filter screen is placed in glass cabin, after 1h, adopts Formaldehyde analyzer to detect concentration of formaldehyde in storehouse.Take out formaldehyde adsorbent, continue to heat paraformaldehyde in glass cabin, make concentration of formaldehyde come back to 2.0mg/m
3, be again placed in glass cabin by formaldehyde adsorbent, survey concentration of formaldehyde after 1h, repeat above-mentioned steps, observe the color change of formaldehyde adsorbent, result is see table 1 simultaneously.
Table 1 testing result
Above to invention has been detailed description, but the invention is not restricted to the embodiments described.The equivalence change that all Spirit Essences according to the present invention are done or modification, all should be encompassed in protection scope of the present invention.
Claims (3)
1. a preparation method for indicator type formaldehyde adsorbent, is characterized in that: described preparation method comprises the steps:
(1), be that 2 ~ 3:1 mixes in molar ratio by magnesium hydroxide and monohydrate alumina, add binding agent, water, mix, for subsequent use, wherein binding agent add that weight is magnesium hydroxide and monohydrate alumina gross weight 10% ~ 30%;
(2), by step (1) gained mixture by banded extruder extrusion molding, obtain that diameter is 0.8 ~ 3mm, length is the cylindrical pellet of 6 ~ 10mm, then dried by particle, the temperature of oven dry is 100 DEG C ~ 120 DEG C;
(3), by step (2) gained impregnated with particles in the permanganate water solution of 1wt% ~ 3wt%, dipping 1.5 ~ 3h, dry, obtain indicator type formaldehyde adsorbent, wherein dry and carry out in potassium permanganate dryer, the temperature of oven dry is 80 DEG C ~ 90 DEG C,
When described indicator type formaldehyde adsorbent is within service life, color is aubergine; After exceeding service life, color becomes light yellow, and the 1h formaldehyde clearance of described indicator type formaldehyde adsorbent within service life is higher than 55%.
2. the preparation method of indicator type formaldehyde adsorbent according to claim 1, is characterized in that: in step (1), and described binding agent is one or more the mixture be selected from recessed soil, kaolin and bentonite.
3. the preparation method of indicator type formaldehyde adsorbent according to claim 1, is characterized in that: in step (3), and described permanganate is potassium permanganate, sodium permanganate or the combination of the two.
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| CN201310002023.1A CN103041767B (en) | 2013-01-05 | 2013-01-05 | Preparation method of indicating formaldehyde adsorbent |
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| CN103752258A (en) * | 2014-01-09 | 2014-04-30 | 苏州英斯迪尼工贸有限公司 | Harmful gas adsorbate and preparation method thereof |
| CN107626303A (en) * | 2017-11-02 | 2018-01-26 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of high-efficient purification formaldehyde materials and products thereof and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279237A (en) * | 2008-05-23 | 2008-10-08 | 张宏 | Purificant for adsorbing formaldehyde and method of preparing the same |
| CN101898076A (en) * | 2009-03-10 | 2010-12-01 | 无锡百奥科环境科技有限公司 | Indoor polluted gas scavenger and preparation method and use thereof |
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| WO2011127008A1 (en) * | 2010-04-08 | 2011-10-13 | Purafil, Inc. | Filtration media having recycled waste materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279237A (en) * | 2008-05-23 | 2008-10-08 | 张宏 | Purificant for adsorbing formaldehyde and method of preparing the same |
| CN101898076A (en) * | 2009-03-10 | 2010-12-01 | 无锡百奥科环境科技有限公司 | Indoor polluted gas scavenger and preparation method and use thereof |
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Effective date of registration: 20210108 Address after: 241199 No.47 standardized workshop, East District, Anhui Xinwu Economic Development Zone, Wanyao District, Wuhu City, Anhui Province Patentee after: Anhui zewen Environmental Protection Technology Co.,Ltd. Address before: 215125 3rd floor, No.2 factory building, 136 Yinsheng Road, Shengpu Town, Suzhou Industrial Park, Jiangsu Province Patentee before: AZUREWIND CLEANTEC Co.,Ltd. |