CN103041767A - Preparation method of indicating formaldehyde adsorbent - Google Patents
Preparation method of indicating formaldehyde adsorbent Download PDFInfo
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- CN103041767A CN103041767A CN2013100020231A CN201310002023A CN103041767A CN 103041767 A CN103041767 A CN 103041767A CN 2013100020231 A CN2013100020231 A CN 2013100020231A CN 201310002023 A CN201310002023 A CN 201310002023A CN 103041767 A CN103041767 A CN 103041767A
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- formaldehyde adsorbent
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- type formaldehyde
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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 main a kind of in the 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 suffers from cancered possibility.Relating to indoor formaldehyde permission standard in " indoor environmental quality standard " is 0.1mg/m3, but FASHIONHOME finishing interior concentration of formaldehyde in 5～October still surpasses this standard, and the formaldehyde in the indoor floor, furniture can sustained release 3～5 years even longer time, and human health is constituted a threat to.
Along with the raising that people require habitation environment quality, various environmental friendly materials and air purifier begin to occur, and the purifying formaldehyde material also occurs in succession.Formaldehyde absorbing product in the market mainly is the formaldehyde adsorbent of similar active carbon, photocatalysis material of titanium dioxide and noble metal catalyst.The active carbon adsorption material PARA FORMALDEHYDE PRILLS(91,95) has certain clean-up effect, but has the shortcoming of formaldehyde desorption under the hot conditions; For photocatalysis material of titanium dioxide and noble metal catalyst, although its clean-up effect is higher, be subjected to the restriction of illumination condition and expensive; And for above-mentioned different materials, the user can not judge intuitively that whether the scavenging material life-span is totally in order in time change.
Chinese invention patent ZL200710306025.4 discloses a kind of colour development methyl aldehyde adsorption material, adopt polyethylene polyamine polymer and the polyethylene glycol mixing of finite concentration molecular weight 8000 to make the formolite reaction agent, then add therein an amount of betanaphthol indicator, at last mixed solution is sprayed at fan-fold paper mass filter surface, reagent all adopts organic matter in this material, there is volatilization 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 is to overcome the deficiencies in the prior art, and a kind of preparation method who indicates the formaldehyde adsorbent of material lifetime and non-secondary pollution is provided.
For solving above technical problem, the present invention takes following technical scheme:
A kind of preparation method of indicator type formaldehyde adsorbent, it comprises the steps:
(1), be that 1～5:1 mixes in molar ratio with magnesium hydroxide and monohydrate alumina, add weight and be 10%～30% binding agent, water of magnesium hydroxide and monohydrate alumina gross weight, mix, for subsequent use;
(2), with step (1) gained mixture by the banded extruder extrusion molding, obtain the cylindrical pellet that diameter is 0.8～3mm, then particle is dried;
(3), with step (2) gained impregnated with particles in the permanganate water solution of 1wt%～3wt%, the dipping 1.5 ~ 3h, the oven dry, namely get the indicator type formaldehyde adsorbent.
Further, in the step (1), the mol ratio of magnesium hydroxide and monohydrate alumina is preferably 2 ~ 3:1.
In the step (1), described binding agent can and be preferably one or more the mixture that is selected from recessed soil, kaolin and the bentonite.
In the step (2), the preferred temperature of described oven dry is 100 ℃ ~ 120 ℃.Dry to moisture content less than 5%.The length of cylindrical pellet can be for example 6 ~ 10mm.
Preferably, in the 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 the potassium permanganate dryer.The temperature of oven dry is preferably 80 ℃ ~ 90 ℃.
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, it is in the service life scope time, and color is aubergine; After surpassing service life, color becomes light yellow.
According to the present invention, the 1h formaldehyde clearance of described indicator type formaldehyde adsorbent in the service life scope is higher than 55%, more preferably, is higher than 60%.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
Gained formaldehyde adsorbent of the present invention not only can be removed the formaldehyde of low concentration in the air quickly and efficiently, and can also indicate its service life by the variation of material color simultaneously.In addition, technique of the present invention is simple, cost is low.
The specific embodiment
The present invention will be further described in detail below in conjunction with specific embodiment, but the invention is not restricted to following examples.
Embodiment 1
Present embodiment provides a kind of indicator type formaldehyde adsorbent, and it prepares as follows:
(1), be that 2:1 mixes with magnesium hydroxide and monohydrate alumina mol ratio, add weight and be 10% recessed soil of magnesium hydroxide and monohydrate alumina gross weight, an amount of water, mix, for subsequent use;
(2), with the mixture of step (1) by the banded extruder extrusion molding, obtaining diameter is that 0.8mm, length are the cylindrical pellet of 6mm, then particle is placed oven dry (water content is lower than 5%) under 110 ℃ of conditions;
(3), the potassium permanganate dipping solution of preparation 1wt%, particle with solution impregnation step (2) oven dry that makes, dipping temperature is normal temperature, dip time 2h, the particle flash baking (bake out temperature is 85 ℃) of adopting at last the potassium permanganate dryer that dipping is obtained gets aubergine indicator type formaldehyde adsorbent.
Embodiment 2
Present embodiment provides a kind of indicator type formaldehyde adsorbent, and it prepares as follows:
(1), with magnesium hydroxide and monohydrate alumina in molar ratio for 3:1 mixes, add weight and be 30% bentonite of magnesium hydroxide and monohydrate alumina gross weight, an amount of water, mix, for subsequent use;
(2), with the mixture of step (1) by the banded extruder extrusion molding, obtaining diameter is that 3mm, length are the cylindrical pellet of 8mm, then particle is placed oven dry (water content is lower than 5%) under 110 ℃ of conditions;
(3) the sodium permanganate dipping solution of preparation 3wt%, particle with solution impregnation step (2) oven dry that makes, dipping 1.5h, the particle flash baking (bake out temperature is 90 ℃) of adopting at last the potassium permanganate dryer that dipping is obtained gets aubergine indicator type formaldehyde adsorbent.
Formaldehyde clearance according to the indicator type formaldehyde adsorbent of the method for above-described embodiment 1 and 2 preparation is detected, method is as follows: get formaldehyde adsorbent 60g to be measured, put into the filter screen that is of a size of 200*200*8mm, and in the glass cabin, heat paraformaldehyde, make that concentration of formaldehyde is 2.0mg/m in the cabin
3, then filter screen is placed in the glass cabin, adopt the formaldehyde analyzer to detect concentration of formaldehyde in the storehouse behind the 1h.Take out formaldehyde adsorbent, continue in the glass cabin, to heat paraformaldehyde, make concentration of formaldehyde come back to 2.0mg/m
3, again formaldehyde adsorbent is placed in the glass cabin, survey concentration of formaldehyde behind the 1h, repeat above-mentioned steps, the change color of observing simultaneously formaldehyde adsorbent, the result is referring to table 1.
Table 1 testing result
More than the present invention has been done detailed description, but the invention is not restricted to the embodiments described.The equivalence that all Spirit Essences according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention.
Claims (10)
1. the preparation method of an indicator type formaldehyde adsorbent, it is characterized in that: described preparation method comprises the steps:
(1), be that 1～5:1 mixes in molar ratio with magnesium hydroxide and monohydrate alumina, add weight and be 10%～30% binding agent, water of magnesium hydroxide and monohydrate alumina gross weight, mix, for subsequent use;
(2), with step (1) gained mixture by the banded extruder extrusion molding, obtain the cylindrical pellet that diameter is 0.8～3mm, then particle is dried;
(3), with step (2) gained impregnated with particles in the permanganate water solution of 1wt%～3wt%, the dipping 1.5 ~ 3h, the oven dry, namely get the indicator type formaldehyde adsorbent.
2. the preparation method of indicator type formaldehyde adsorbent according to claim 1, it is characterized in that: in the step (1), the mol ratio of magnesium hydroxide and monohydrate alumina is 2 ~ 3:1.
3. the preparation method of indicator type formaldehyde adsorbent according to claim 1 is characterized in that: in the step (1), described binding agent is one or more the mixture that is selected from recessed soil, kaolin and the bentonite.
4. the preparation method of indicator type formaldehyde adsorbent according to claim 1, it is characterized in that: in the step (2), the temperature of described oven dry is 100 ℃ ~ 120 ℃.
5. the preparation method of indicator type formaldehyde adsorbent according to claim 1, it is characterized in that: in the step (2), the length of described cylindrical pellet is 6 ~ 10mm.
6. the preparation method of indicator type formaldehyde adsorbent according to claim 1, it is characterized in that: in the step (3), described permanganate is potassium permanganate, sodium permanganate or the combination of the two.
7. the preparation method of indicator type formaldehyde adsorbent according to claim 1, it is characterized in that: the described oven dry of step (3) is carried out in the potassium permanganate dryer.
8. the preparation method of indicator type formaldehyde adsorbent according to claim 7, it is characterized in that: the temperature of the described oven dry of step (3) is 80 ℃ ~ 90 ℃.
9. the preparation method such as the described indicator type formaldehyde adsorbent of each claim in the claim 1 ~ 8 prepares gained indicator type formaldehyde adsorbent, it is characterized in that: described indicator type formaldehyde adsorbent is in the service life scope time, and color is aubergine; After surpassing service life, color becomes light yellow.
10. indicator type formaldehyde adsorbent according to claim 9 is characterized in that: the 1h formaldehyde clearance of described indicator type formaldehyde adsorbent in the service life scope is higher than 55%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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| 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 |
| US20110316186A1 (en) * | 2010-04-08 | 2011-12-29 | Purafil, Inc. | Filtration Media Having Recycled Waste Materials |
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Patent Citations (3)
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| 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 |
| US20110316186A1 (en) * | 2010-04-08 | 2011-12-29 | Purafil, Inc. | Filtration Media Having Recycled Waste Materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103041767B (en) | 2015-06-24 |
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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. |