CN106178816A - The preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde - Google Patents
The preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde Download PDFInfo
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- CN106178816A CN106178816A CN201610638777.XA CN201610638777A CN106178816A CN 106178816 A CN106178816 A CN 106178816A CN 201610638777 A CN201610638777 A CN 201610638777A CN 106178816 A CN106178816 A CN 106178816A
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- activated carbon
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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
- 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
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Abstract
The invention discloses the preparation method of the modified activated carbon of a kind of adsorption of Low Concentration formaldehyde, comprise the following steps: a, oxidation: after soaking activated carbon 1～1.5h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 10%～15%, filter, dry for standby；B, modification: join in the zinc chloride and magnesium sulfate mixed solution that molar concentration is 1.0～2.0mol/L by the activated carbon after oxidation, soak 8～10h in 35～40 DEG C of ultrasonic wave concussion, and wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；C, be dried: by after modification activated carbon filter, natural air drying；D, at N2Under protection, calcining: d1: dried activated carbon is calcined at 300～400 DEG C 2～3h；D2: calcine 1～2h at 400～500 DEG C；D3: calcine 0.5～1h at 500～600 DEG C.The clearance of the activated carbon PARA FORMALDEHYDE PRILLS(91,95) after process is high.
Description
Technical field
The invention belongs to air purification field, particularly relate to the preparation side of the modified activated carbon of a kind of adsorption of Low Concentration formaldehyde
Method.
Background technology
There are equipment and the technology of the middle formaldehyde that much purifies the air of a room in the market, are broadly divided into following two: 1,
Physical adsorption techniques, removes formaldehyde mainly by various porous materials by physical absorption.It is most commonly used that activated carbon,
In addition with molecular sieve, bentonite, perlite, cristobalite.Gaseous state aldehydes is difficult with traditional activated carbon and carries out physical absorption,
The particularly gas to low concentration, after adsorption equilibrium, poor stability, easily it is desorbed, is easily changed by variations in temperature and concentration of formaldehyde
Impact.2, chemistry neutralization technology, some companies develop at present various eliminating smell agents and formaldehyde catching agent, typically use complexation
Technology, the molecular structure destroying formaldehyde achieves the goal, but high cost, not yet combine fitting-out work and use.
Summary of the invention
The technical problem to be solved is to provide the preparation side of the modified activated carbon of a kind of adsorption of Low Concentration formaldehyde
Method.
The present invention solves the preparation method of the modified activated carbon of the adsorption of Low Concentration formaldehyde that its technical problem is used, including
Following steps:
A, oxidation: with hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 10%～15% soak activated carbon 1～
After 1.5h, filter, dry for standby；
B, modification: the activated carbon after oxidation is joined the zinc chloride and sulfur that molar concentration is 1.0～2.0mol/L
In acid magnesium mixed solution, soaking 8～10h in 35～40 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1 with the mol ratio of magnesium sulfate:
1；
C, be dried: by after modification activated carbon filter, natural air drying；
D, calcining:
D1: at N2Under protection, dried for step c activated carbon is calcined at 300～400 DEG C 2～3h, obtain once activity
Charcoal；
D2: at N2Under protection, an activated carbon is calcined 1～2h at 400～500 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 500～600 DEG C 0.5～1h.
Preferably, in a step, soak activated carbon with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 13%
1.5h。
Preferably, in b step, the activated carbon after oxidation is joined the zinc chloride and sulphuric acid that molar concentration is 1.8mol/L
In magnesium mixed solution, soak 9h in 37 DEG C of ultrasonic wave concussion.
Preferably, in Step d:
D1: at N2Under protection, dried for step c activated carbon is calcined at 320～360 DEG C 2.5h, obtain once activity
Charcoal；
D2: at N2Under protection, an activated carbon is calcined 1.5h at 430～480 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 540～560 DEG C 0.8h.
The invention has the beneficial effects as follows: use activated carbon prepared by the method for the present invention, the clearance of its PARA FORMALDEHYDE PRILLS(91,95) is high, i.e.
Making concentration of formaldehyde≤10ppm, clearance also can reach more than 93%.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described.
The preparation method of the modified activated carbon of the adsorption of Low Concentration formaldehyde of the present invention, comprises the following steps:
A, oxidation: with hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 10%～15% soak activated carbon 1～
After 1.5h, filter, dry for standby；
B, modification: the activated carbon after oxidation is joined the zinc chloride and sulfur that molar concentration is 1.0～2.0mol/L
In acid magnesium mixed solution, soak 8～10h in 35～40 DEG C of ultrasonic wave concussion；Wherein, zinc chloride is 1 with the mol ratio of magnesium sulfate:
1；
C, be dried: by after modification activated carbon filter, natural air drying；
D, calcining:
D1: at N2Under protection, dried for step c activated carbon is calcined at 300～400 DEG C 2～3h, obtain once activity
Charcoal；
D2: at N2Under protection, an activated carbon is calcined 1～2h at 400～500 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 500～600 DEG C 0.5～1h.
Preferably, in a step, soak activated carbon with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 13%
1.5h。
Preferably, in b step, the activated carbon after oxidation is joined the zinc chloride and sulphuric acid that molar concentration is 1.8mol/L
In magnesium mixed solution, soak 9h in 37 DEG C of ultrasonic wave concussion.
Preferably, in Step d:
D1: at N2Under protection, dried for step c activated carbon is calcined at 320～360 DEG C 2.5h, obtain once activity
Charcoal；
D2: at N2Under protection, an activated carbon is calcined 1.5h at 430～480 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 540～560 DEG C 0.8h.
Embodiment 1:
Take activated carbon 8g, after soaking activated carbon 1.5h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 10%,
Filter, dry for standby；Activated carbon after oxidation is joined zinc chloride that molar concentration is 1.0mol/L and magnesium sulfate mixing is molten
In liquid, soaking 10h in 36 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；Filter, natural air drying；
At N2Under protection, at 350 DEG C, calcine 2.5h, obtain an activated carbon；At N2Under protection, an activated carbon is calcined at 400 DEG C
2h, obtains secondary activated carbon；At N2Under protection, secondary activated carbon is calcined at 500 DEG C 1h.
The volume that activated carbon through above-mentioned process is placed in concentration of formaldehyde 10ppm is 1m3Obturator in, it is to first
The clearance of aldehyde is 93.5%.
Embodiment 2:
Take activated carbon 8g, after soaking activated carbon 1.5h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 13%,
Filter, dry for standby；Activated carbon after oxidation is joined zinc chloride that molar concentration is 1.8mol/L and magnesium sulfate mixing is molten
In liquid, soaking 9h in 37 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；Filter, natural air drying；?
N2Under protection, at 340 DEG C, calcine 2.5h, obtain an activated carbon；At N2Under protection, an activated carbon is calcined at 450 DEG C
1.5h, obtains secondary activated carbon；At N2Under protection, secondary activated carbon is calcined at 550 DEG C 0.8h.
It is 1m that activated carbon through above-mentioned process is placed in the volume that concentration of formaldehyde is 10ppm3Obturator in, it is right
The clearance of formaldehyde is 94.8%.
Embodiment 3:
Take activated carbon 8g, after soaking activated carbon 1h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 15%, mistake
Filter, dry for standby；Activated carbon after oxidation is joined the zinc chloride and magnesium sulfate mixed solution that molar concentration is 2.0mol/L
In, soak 8h in 37 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；Filter, natural air drying；At N2
Under protection, at 390 DEG C, calcine 2h, obtain an activated carbon；At N2Under protection, an activated carbon is calcined 1h at 480 DEG C,
Secondary activated carbon；At N2Under protection, secondary activated carbon is calcined at 600 DEG C 0.5h.
It is 1m that activated carbon through above-mentioned process is placed in the volume that concentration of formaldehyde is 8ppm3Obturator in, it is right
The clearance of formaldehyde is 95.2%.
Embodiment 4:
Take activated carbon 8g, after soaking activated carbon 1h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 14%, mistake
Filter, dry for standby；Activated carbon after oxidation is joined the zinc chloride and magnesium sulfate mixed solution that molar concentration is 1.4mol/L
In, soak 10h in 37 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；Filter, natural air drying；?
N2Under protection, at 330 DEG C, calcine 2.5h, obtain an activated carbon；At N2Under protection, an activated carbon is calcined at 450 DEG C
1.5h, obtains secondary activated carbon；At N2Under protection, secondary activated carbon is calcined at 560 DEG C 0.8h.
It is 1m that activated carbon through above-mentioned process is placed in the volume that concentration of formaldehyde is 6ppm3Obturator in, it is right
The clearance of formaldehyde is 96.1%.
Claims (4)
1. the preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde, it is characterised in that comprise the following steps:
A, oxidation: after soaking activated carbon 1～1.5h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 10%～15%,
Filter, dry for standby；
B, modification: the activated carbon after oxidation is joined the zinc chloride and magnesium sulfate that molar concentration is 1.0～2.0mol/L
In mixed solution, soaking 8～10h in 35～40 DEG C of ultrasonic wave concussion, wherein, zinc chloride is 1:1 with the mol ratio of magnesium sulfate；
C, be dried: by after modification activated carbon filter, natural air drying；
D, calcining:
D1: at N2Under protection, dried for step c activated carbon is calcined at 300～400 DEG C 2～3h, obtains an activated carbon；
D2: at N2Under protection, an activated carbon is calcined 1～2h at 400～500 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 500～600 DEG C 0.5～1h.
2. the preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde as claimed in claim 1, it is characterised in that: a step
In, soak activated carbon 1.5h with the hydrogenperoxide steam generator ultrasonic wave concussion that volumetric concentration is 13%.
3. the preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde as claimed in claim 1 or 2, it is characterised in that: b walks
In Zhou, the activated carbon after oxidation is joined in the zinc chloride and magnesium sulfate mixed solution that molar concentration is 1.8mol/L, in 37
DEG C ultrasonic wave concussion soaks 9h.
4. the preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde as claimed any one in claims 1 to 3, its feature
It is:
In Step d:
D1: at N2Under protection, dried for step c activated carbon is calcined at 320～360 DEG C 2.5h, obtains an activated carbon；
D2: at N2Under protection, an activated carbon is calcined 1.5h at 430～480 DEG C, obtains secondary activated carbon；
D3: at N2Under protection, secondary activated carbon is calcined at 540～560 DEG C 0.8h.
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| CN201610638777.XA CN106178816A (en) | 2016-08-05 | 2016-08-05 | The preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde |
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| CN201610638777.XA CN106178816A (en) | 2016-08-05 | 2016-08-05 | The preparation method of the modified activated carbon of adsorption of Low Concentration formaldehyde |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159121A (en) * | 2017-06-30 | 2017-09-15 | 东北林业大学 | A kind of modified activated carbon and its preparation method and application |
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| CN103769053A (en) * | 2014-02-28 | 2014-05-07 | 东北林业大学 | Preparation method for activated carbon special for removal of low-concentration formaldehyde in room |
| CN105289229A (en) * | 2015-11-13 | 2016-02-03 | 林贤文 | Natural formaldehyde-removing material |
| CN105396611A (en) * | 2015-11-13 | 2016-03-16 | 朱忠良 | Catalytic composition for preventing air pollution |
| CN105582757A (en) * | 2014-11-12 | 2016-05-18 | 重庆台飞科技有限公司 | Air purifying apparatus |
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2016
- 2016-08-05 CN CN201610638777.XA patent/CN106178816A/en active Pending
Patent Citations (5)
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| CN103769053A (en) * | 2014-02-28 | 2014-05-07 | 东北林业大学 | Preparation method for activated carbon special for removal of low-concentration formaldehyde in room |
| CN105582757A (en) * | 2014-11-12 | 2016-05-18 | 重庆台飞科技有限公司 | Air purifying apparatus |
| CN105289229A (en) * | 2015-11-13 | 2016-02-03 | 林贤文 | Natural formaldehyde-removing material |
| CN105396611A (en) * | 2015-11-13 | 2016-03-16 | 朱忠良 | Catalytic composition for preventing air pollution |
| CN105597812A (en) * | 2015-11-14 | 2016-05-25 | 无锡清杨机械制造有限公司 | Catalytic composition for purifying air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159121A (en) * | 2017-06-30 | 2017-09-15 | 东北林业大学 | A kind of modified activated carbon and its preparation method and application |
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Application publication date: 20161207 |