CN107282003A - A kind of preparation method of the efficient modified activated carbon for removing formaldehyde in air - Google Patents
A kind of preparation method of the efficient modified activated carbon for removing formaldehyde in air Download PDFInfo
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- CN107282003A CN107282003A CN201710539191.2A CN201710539191A CN107282003A CN 107282003 A CN107282003 A CN 107282003A CN 201710539191 A CN201710539191 A CN 201710539191A CN 107282003 A CN107282003 A CN 107282003A
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- 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
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
The present invention discloses a kind of preparation method of the efficient modified activated carbon for removing formaldehyde in air, base charcoal is used as using conventional activated carbon, nitrogen substance and deionized water are weighed, nitrogen substance is dissolved in deionized water, base charcoal is added and is well mixed, stand a few hours, handled again with ultrasonic wave added, gained base charcoal is tiled, dried after air-drying, after naturally cool to room temperature, modified activated carbon is produced.The present invention provide except modified formaldehyde activated carbon raw material is safety and low cost, cost is low, method is easy, easy to operate, easily in industry expansion；Use physical absorption and fix chemical reaction and eliminate the method that is combined, except effect of formaldehyde significantly, and safety and stability, will not secondary pollution, it is easy to use.Adsorbing formaldehyde in air ability can>90%, reach that top grade goes the level of the special charcoal of formaldehyde.
Description
Technical field
The present invention relates to a kind of method of modifying of activated carbon, and in particular to a kind of efficient modified work for removing formaldehyde in air
The preparation method of property charcoal.
Background technology
Formaldehyde, is a kind of colourless, irritant smell gas.Formaldehyde is to the mucocutaneous stimulation that has, indoors
When reaching finite concentration, people just has sense of discomfort.Concentration of formaldehyde more than 0.08m3 can cause furious, eye to be itched, throat discomfort or pain
Bitterly, the symptom such as hoarseness, sneeze, uncomfortable in chest, asthma, dermatitis.Newly-decorated room content of formaldehyde is higher, is the master of numerous diseases
Want inducement.And pregnant woman's suction for a long time may cause fetal anomaly, or even dead, suction can cause man's sperm abnormal to man for a long time
Shape, death etc., can also cause rhinocarcinoma.Because formaldehyde is in the extensive use of adhesive industry, typically used in furniture and new car etc.
Formaldehyde can all be contained in paint, newly-decorated house burst size of methanal is even more serious.The formaldehyde adsorbed in air uses activated carbon, needs
Regularly replace, in order to avoid reach that adsorption saturation causes secondary pollution as Form aldehyde release source on the contrary.But normal activated carbon is adsorbed
Formaldehyde is physical absorption, adsorbs unstable easy secondary pollution, and formaldehyde adsorption inferior capabilities, and the replacement cycle is short, and charcoal consumption is big.
The content of the invention
To solve the above problems, the present invention proposes a kind of preparation side of the efficient modified activated carbon for removing formaldehyde in air
Method, is changed by being modified to obtain efficiently removing formaldehyde in air to particle, amorphous or powdered coal system, wooden or active fruit shell carbon
Property charcoal.
To achieve the above object, the technical solution adopted in the present invention is：A kind of efficient modification for removing formaldehyde in air
The preparation method of activated carbon, comprises the following steps：
（1）Raw material prepares：Using conventional activated carbon as base charcoal, the saturation adsorpting water quantity M of base charcoal is surveyed；Weigh base carbonaceous amount 1~20%
Nitrogen substance；Take saturation adsorpting water quantity M 1~2 times of deionized water；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
1~5 hour, base charcoal is fully absorbed solution, then handled 1~60 minute with ultrasonic wave added, base charcoal is stirred frequently during this so that
Solution is absorbed by full and uniform；
（3）Drying process：By step（2）Gained base charcoal tiles, and charcoal material thickness about 1.5cm stirs frequently, through air-drying after 50~
Dried 1~6 hour at 80 DEG C, base charcoal is stirred frequently during this；Drying is immediately placed in drying receptacle again, after naturally cool to room
Temperature, prevents adsorption moisture in cooling procedure, produces modified activated carbon.
The step（1）Conventional activated carbon be coal mass active carbon, wood activated charcoal, active fruit shell carbon in one kind or several
Kind.
The step（1）Conventional activated carbon be graininess, powdered or amorphous.
The step（1）Saturation adsorpting water quantity M be by it is following operation measure：1Kg base charcoals to be measured are weighed, water is added and counts
Measure M0, stir realization fully absorption, then the weighing filtrate quality M after suction filtration1, deduct this quality and produce adsorbed water
Mn, i.e. Mn= M0- M1, repeat to survey for several times, take MnAverage value be the saturation adsorpting water quantity M for obtaining the base charcoal to be measured.
The step（1）Nitrogen substance be made up of the component of following masses part：1~3 part of inorganic ammonium salt, organic amine salt 1
Part.Wherein, inorganic ammonium salt is ammonium chloride NH4Cl, ammonium hydrogen carbonate NH4HCO3, ammonium carbonate (NH4)2CO3, ammonium hydrogen sulfate NH4HSO3, sulphur
Sour ammonium (NH4)2SO4Deng；Organic amine salt is urea CO (NH2)2, diethylamine, triethylamine etc..
The step（2）Ultrasonic wave added processing power be 100w.
Beneficial effects of the present invention：Existing market is generally physical absorption formaldehyde except formaldehyde activity charcoal, common living relative to these
Property charcoal, the present invention is modified processing to it, and the method for modifying of use is dipping-absorption-seasoning, adds effective nitrogen component negative
It is downloaded to inside activated carbon capillary, after normal activated carbon absorbing formaldehyde gas enters inside, effective nitrogen component can combine formaldehyde hair
Raw reaction, so as to constantly remove the formaldehyde in air, does not produce gaseous product.Compared with conventional physical method, formaldehyde quilt
Normal activated carbon physical absorption, easily reaches saturation state, and when temperature, pressure, humidity change, formaldehyde gas is easily escaped
The absorption of activated carbon, is evaporated into air again, causes content of formaldehyde to rebound, formation secondary pollution, and this method, conjugate
The two methods of reason-chemistry, are first adsorbed, then are eliminated so that except formaldehyde process can reach a state steady in a long-term, can be with
Effectively remove the formaldehyde in air.
In summary, the modified formaldehyde activated carbon that removes that the present invention is provided has advantages below：（1）Materials safety, price are low
Honest and clean, cost is low；（2）Preparation method only needs simple impregnation drying, and method is easy, easy to operate, easily in industry expansion；（3）
The present invention's fixes-chemically reacts the method that elimination is combined except formaldehyde activity charcoal uses physical absorption, except effect of formaldehyde
Significantly, and safety and stability, will not secondary pollution, it is easy to use.
The present invention is proposed in existing ature of coal, wooden and active fruit shell carbon（Particle, amorphous and powder）On the basis of, pass through
The method of chemical load is modified to it, and organic amine salt and inorganic ammonium salt are applied in combination, and obtains being loaded with the modified active of available nitrogen
Charcoal, formaldehyde that can efficiently in Adsorption air.According to《QB/T 2761-2006 indoor air purification product clean-up effects
Assay method》Detection obtains data display, and absorption formaldehyde in air ability can>90%, reach that top grade removes the water of the special charcoal of formaldehyde
It is flat.Compared with other activated carbons, preparation method is simple, with low cost, and the cost of formaldehyde charcoal is gone in largely reduction, and is born
The available nitrogen stable components of load are adsorbed in activated carbon, can eliminate the formaldehyde of absorption, are difficult to disperse to cause secondary pollution.
Embodiment
Technical characterstic for a better understanding of the present invention, is further explained present invention work with reference to specific embodiment
State.It should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that ability
Field technique personnel can make various changes or modifications after the content of the invention lectured has been read to content, these shapes of equal value
Formula equally falls within the application appended claims limited range.
Embodiment 1
（1）Raw material prepares：The saturation adsorpting water quantity M of coal mass active carbon is surveyed by following operation：
1Kg coal mass active carbons are weighed, water is added and measures M0, stir realization fully absorption, then weighs after suction filtration filtrate
Mass M1, deduct this quality and produce adsorbed water Mn, i.e. Mn= M0- M1, repeat to survey for several times, take MnAverage value be to obtain
Saturation adsorpting water quantity M=600g/Kg of the coal mass active carbon；
Using the granular coal mass active carbon 1Kg of 5~10 mesh as base charcoal, the nitrogen substance of base carbonaceous amount 12% is weighed（Including 80g
Ammonium chloride NH4Cl and 40g urea CO (NH2)2）；Take saturation adsorpting water quantity M 2 times of deionized water 1200g；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
1 hour, base charcoal is fully absorbed solution, then handled 60 minutes using power as 100w ultrasonic wave added, base is stirred frequently during this
Charcoal so that solution is absorbed by full and uniform；
（3）Drying process：By step（2）Gained base charcoal is tiled, and charcoal material thickness about 1.5cm is stirred frequently, through air-drying after 80 DEG C
Lower drying 6 hours, stirs base charcoal during this frequently；Drying is immediately placed in drying receptacle again, after naturally cool to room temperature, is prevented
Adsorption moisture in cooling procedure, produces modified activated carbon.
Detection method according to《QB/T 2761-2006 indoor air purification product clean-up effect assay methods》, wherein, first
Aldehyde concentration standard is 0.2%, and assay method is phenol reagent method.Formaldehyde test result is：1 hour formaldehyde clearance：
75.3%；2 hours formaldehyde clearances：91.4%.
Embodiment 2
（1）Raw material prepares：The saturation adsorpting water quantity M of cocoanut active charcoal is surveyed by following operation：
1Kg cocoanut active charcoals to be measured are weighed, water is added and measures M0, stir realization fully absorption, then is weighed after suction filtration
Filtrate quality M1, deduct this quality and produce adsorbed water Mn, i.e. Mn= M0- M1, repeat to survey for several times, take MnAverage value be
Obtain saturation adsorpting water quantity M=900g/Kg of the cocoanut active charcoal to be measured；
Using the unbodied cocoanut active charcoal 1kg of 10~28 mesh as base charcoal, the nitrogen substance of base carbonaceous amount 9% is weighed（Carbon containing 60g
Sour hydrogen ammonium NH4HCO3With 30g diethylamine；Take saturation adsorpting water quantity M 1 times of deionized water 900g；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
2 hours, base charcoal is fully absorbed solution, then handled 30 minutes using power as 100w ultrasonic wave added, base is stirred frequently during this
Charcoal so that solution is absorbed by full and uniform；
（3）Drying process：By step（2）Gained base charcoal is tiled, and charcoal material thickness about 1.5cm is stirred frequently, through air-drying after 60 DEG C
Lower drying 5 hours, stirs base charcoal during this frequently；Drying is immediately placed in drying receptacle again, after naturally cool to room temperature, is prevented
Adsorption moisture in cooling procedure, produces modified activated carbon.
Detection method according to《QB/T 2761-2006 indoor air purification product clean-up effect assay methods》, wherein, first
Aldehyde concentration standard is 0.2%, and assay method is phenol reagent method.Formaldehyde test result is：1 hour formaldehyde clearance：
77.1%；2 hours formaldehyde clearances：92.7%.
Embodiment 3
（1）Raw material prepares：The saturation adsorpting water quantity M of wood activated charcoal is surveyed by following operation：
1Kg wood activated charcoals to be measured are weighed, water is added and measures M0, stir realization fully absorption, then is weighed after suction filtration
Filtrate quality M1, deduct this quality and produce adsorbed water Mn, i.e. Mn= M0- M1, repeat to survey for several times, take MnAverage value be
Obtain saturation adsorpting water quantity M=500g/K of the wood activated charcoal to be measured；
Using the powdered wood activated charcoal 1kg of 40~80 mesh as base charcoal, the nitrogen substance of base carbonaceous amount 1% is weighed（Sulfuric acid containing 5g
Ammonium (NH4)2SO4With 5g triethylamines）；Take saturation adsorpting water quantity M 1 times of deionized water 500g；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
5 hours, base charcoal is fully absorbed solution, then handled 40 minutes using power as 100w ultrasonic wave added, base is stirred frequently during this
Charcoal so that solution is absorbed by full and uniform；
（3）Drying process：By step（2）Gained base charcoal is tiled, and charcoal material thickness about 1.5cm is stirred frequently, through air-drying after 50 DEG C
Lower drying 1 hour, stirs base charcoal during this frequently；Drying is immediately placed in drying receptacle again, after naturally cool to room temperature, is prevented
Adsorption moisture in cooling procedure, produces modified activated carbon.
Detection method according to《QB/T 2761-2006 indoor air purification product clean-up effect assay methods》, wherein, first
Aldehyde concentration standard is 0.2%, and assay method is phenol reagent method.Formaldehyde test result is：1 hour formaldehyde clearance：
76.2%；2 hours formaldehyde clearances：92.1%.
Embodiment 4
（1）Raw material prepares：Using the powdered coal mass active carbon of 20~50 mesh and cocoanut active charcoal 1kg as base charcoal, by following behaviour
Make the saturation adsorpting water quantity M of survey base charcoal：
1Kg base charcoals to be measured are weighed, water is added and measures M0, stir realization fully absorption, then the weighing filtrate matter after suction filtration
Measure M1, deduct this quality and produce adsorbed water Mn, i.e. Mn= M0- M1, repeat to survey for several times, take MnAverage value be this
Saturation adsorpting water quantity M=550g/Kg of base charcoal to be measured；
Weigh the nitrogen substance of base carbonaceous amount 20%（(the NH of ammonium carbonate containing 133g4)2CO3With 67g urea CO (NH2)2）；Saturation is taken to inhale
Attached water amount M 2 times of deionized water 1100g；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
4 hours, base charcoal is fully absorbed solution, then handled 1 minute using power as 100w ultrasonic wave added, base is stirred frequently during this
Charcoal so that solution is absorbed by full and uniform；
（3）Drying process：By step（2）Gained base charcoal is tiled, and charcoal material thickness about 1.5cm is stirred frequently, through air-drying after 60 DEG C
Lower drying 4 hours, stirs base charcoal during this frequently；Drying is immediately placed in drying receptacle again, after naturally cool to room temperature, is prevented
Adsorption moisture in cooling procedure, produces modified activated carbon.
Detection method according to《QB/T 2761-2006 indoor air purification product clean-up effect assay methods》, wherein, first
Aldehyde concentration standard is 0.2%, and assay method is phenol reagent method.Formaldehyde test result is：1 hour formaldehyde clearance：
81.5%；2 hours formaldehyde clearances：94.6%.
Comparative example 1：The granular coal mass active carbon of conventional 5~10 mesh.
Comparative example 2：The granular coal mass active carbon of conventional 5~10 mesh is taken, is modified according to a conventional method：By the 500g activated carbons
It is immersed in 4L1% liquor potassic permanganate, promotes it to impregnate with ultrasound, drying is taken out after 2h, then under the protection of nitrogen, in
600 DEG C of heating half an hour, the potassium permanganate on activated carbon is set to be decomposed into MnO completelyxAfter (1≤x≤2) cooling completely, packaging
Produce modified activated carbon.
Comparative example 3：The granular coal mass active carbon of conventional 5~10 mesh is taken, is modified according to a conventional method：By the granular activated carbon
It is immersed in Na2CO3And NaHSO3Mix in saturated solution, after immersion 1h, place into sodium hydrogensulfite saturated solution and soak 1h；
2h is dried under the conditions of 70~80 DEG C, cooling packing produces modified activated carbon.
Comparative example 4：Be the same as Example 1, only omits step（2）In Sonication assisted treatment, obtain modified activated carbon.
Activated carbon obtained by above-mentioned comparative example and embodiment is placed in 0.9 × 0.9 × 1.85 closed=1.5m3Space
It is used for formaldehyde adsorption down, ortho-formaldehyde solution concentration is 0.2%, and observes content of formaldehyde in each hour record：
Claims (7)
1. a kind of preparation method of the efficient modified activated carbon for removing formaldehyde in air, it is characterised in that comprise the following steps：
（1）Raw material prepares：Using conventional activated carbon as base charcoal, the saturation adsorpting water quantity M of base charcoal is surveyed；Weigh base carbonaceous amount 1~20%
Nitrogen substance；Take saturation adsorpting water quantity M 1~2 times of deionized water；
（2）Loading process：By step（1）In nitrogen substance be dissolved in deionized water, add base charcoal be well mixed, stand
1~5 hour, then handled 1~60 minute with ultrasonic wave added；
（3）Drying process：By step（2）Gained base charcoal tiles, and through air-drying after being dried 1~6 hour at 50~80 DEG C, treats nature
Room temperature is cooled to, modified activated carbon is produced.
2. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 1, it is characterised in that：
The step（1）Conventional activated carbon be coal mass active carbon, wood activated charcoal, active fruit shell carbon in one or more.
3. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 1, it is characterised in that：
The step（1）Conventional activated carbon be graininess, powdered or amorphous.
4. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 1, it is characterised in that：
The step（1）Saturation adsorpting water quantity M be by it is following operation measure：1Kg base charcoals to be measured are weighed, water is added and measures M0, stir
Uniform realize is mixed fully to adsorb, then the weighing filtrate quality M after suction filtration1, deduct this quality and produce adsorbed water Mn, i.e. Mn=
M0- M1, repeat to survey for several times, take MnAverage value be the saturation adsorpting water quantity M for obtaining the base charcoal to be measured.
5. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 1, it is characterised in that：
The step（1）Nitrogen substance be made up of the component of following masses part：1~3 part of inorganic ammonium salt, 1 part of organic amine salt.
6. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 1, it is characterised in that：
The step（2）Ultrasonic wave added processing power be 100w.
7. the preparation method of the efficient modified activated carbon for removing formaldehyde in air according to claim 5, it is characterised in that：
Inorganic ammonium salt is ammonium chloride, ammonium hydrogen carbonate, ammonium carbonate, ammonium hydrogen sulfate or ammonium sulfate；Organic amine salt is urea, diethylamine or three second
Amine.
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| CN107694323A (en) * | 2017-11-24 | 2018-02-16 | 宁夏浦士达环保科技有限公司 | Modifying agent, the modified high-efficient for removing formaldehyde remove formaldehyde activity charcoal and preparation method |
| CN107748231A (en) * | 2017-11-07 | 2018-03-02 | 宁波市雨辰环保科技有限公司 | Charcoal absorption formaldehyde saturation indicator and preparation method thereof |
| CN108295816A (en) * | 2018-01-19 | 2018-07-20 | 深圳中纺滤材科技有限公司 | A kind of normal-temperature efficient is except modified formaldehyde charcoal and preparation method thereof |
| CN108939813A (en) * | 2018-09-18 | 2018-12-07 | 北京林业大学 | A kind of preparation method of the modified activated carbon of efficient removal indoor formaldehyde |
| CN109225141A (en) * | 2018-10-19 | 2019-01-18 | 上海纳米技术及应用国家工程研究中心有限公司 | The preparation method and product of the carbon-based room temperature scavenging material of polyfunctional group for formaldehyde removal and application |
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| CN117244525A (en) * | 2023-11-16 | 2023-12-19 | 成都达奇科技股份有限公司 | Modified activated carbon with high formaldehyde adsorption rate and preparation method thereof |
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