CN102786051A - Method for preparing active carbon by low temperature pretreating with phosphoric acid - Google Patents

Method for preparing active carbon by low temperature pretreating with phosphoric acid Download PDF

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Publication number
CN102786051A
CN102786051A CN2012102456575A CN201210245657A CN102786051A CN 102786051 A CN102786051 A CN 102786051A CN 2012102456575 A CN2012102456575 A CN 2012102456575A CN 201210245657 A CN201210245657 A CN 201210245657A CN 102786051 A CN102786051 A CN 102786051A
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China
Prior art keywords
phosphoric acid
active carbon
low temperature
treatment
activation
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Pending
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CN2012102456575A
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Chinese (zh)
Inventor
薛剑平
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TAICANG LIANLIN ACTIVE CARBON FACTORY
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TAICANG LIANLIN ACTIVE CARBON FACTORY
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Priority to CN2012102456575A priority Critical patent/CN102786051A/en
Publication of CN102786051A publication Critical patent/CN102786051A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for preparing active carbon by low temperature pretreating with phosphoric acid, comprising the following steps: mixing China fir with a phosphoric acid solution having a concentration of 30-60wt% according to an impregnation ratio of 0.75-1.50, pretreating at 25-180 DEG C for 6h, then adding the pretreated mixture in a porcelain crucible, heating up to 350-550 DEG C in a muffle furnace, activating for 0.5-2.0h, cooling, washing to neutral, drying, and crushing and screening by a sieve of 200 meshes. According to the invention, by pretreating the active carbon prepared by the invention at low temperature, the penetration of phosphoric acid in wood raw materials is benefited, the activation effect of phosphoric acid is promoted, and the adsorption performance of the active carbon is raised.

Description

Low temperature pre-treatment phosphoric acid legal system is equipped with process of active carbon
Technical field
The invention belongs to the activated carbon technology field, relate to the preparation of gac, be specifically related to a kind of low temperature pre-treatment phosphoric acid legal system and be equipped with process of active carbon.
Background technology
At present, preparation method of active carbon mainly contains physics method and chemical method.The physics method is an activated media with water vapor and carbonic acid gas mainly, and chemical method is an acvator with phosphoric acid and zinc chloride mainly.The phosphoric acid method is widely used in the production of wood activated charcoal as a kind of method for preparation of active carbon of routine. compare with zinc chloride process, the phosphoric acid method have pollution less, advantage such as easy recovery, compare with the physics method, the phosphoric acid method has that energy consumption is low, the yield advantages of higher.Therefore, Chinese scholars has been carried out a large amount of research to the influence factor of the physical chemistry structure of phosphoric acid method gac, aperture structure, activating mechanism etc.The phosphoric acid legal system is equipped with gac and mainly adopts the phosphate impregnation wood material, under higher temperature, carries out activation.
Summary of the invention
In order to overcome the deficiency of prior art, the invention provides a kind of low temperature pre-treatment phosphoric acid legal system and be equipped with process of active carbon, the wood material to phosphate impregnation is crossed carries out pre-treatment at low temperatures, carries out activation again.
Cedar sawdust is mixed by 0.75~1.50 impregnating ratio with the phosphoric acid solution of concentration 30~60wt%, under 25~180 ℃ lesser temps, carry out pre-treatment, behind the 6h; Put into the porcelain crucible, in muffle furnace, be warming up to 350~550 ℃, activation O.5~2.0h; Cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Preferred pretreatment temperature is 80~180 ℃, and further preferred pretreatment temperature is 140 ℃.
Preferred activation temperature is 450~550 ℃, and further preferred activation temperature is 500 ℃.
Preferred impregnating ratio is 0.75~1.25, and further preferred impregnating ratio is 1.0.
Preferred soaking time is 1.0~2.0h, and further preferred soaking time is 1.5h.
Through the gac of method preparation of the present invention, the low temperature pre-treatment helps phosphoric acid in the inner infiltration of wood material, promotes the activation of phosphoric acid, improves the absorption property of gac.
Embodiment
The present invention is test raw material with the cedar sawdust, crushing screening, get particle diameter O.2~1.0mm, pharmaceutical chemicalss such as phosphoric acid, iodine, methylene blue, Sulfothiorine are analytical pure.
Embodiment 1
The phosphoric acid solution of 100g cedar sawdust with 75g concentration 60wt% mixed, under 25 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 350 ℃, activation 2.0h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Embodiment 2
The phosphoric acid solution of 100g cedar sawdust with 100g concentration 50wt% mixed, under 80 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 450 ℃, activation 1.0h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Embodiment 3
The phosphoric acid solution of 100g cedar sawdust with 125g concentration 40wt% mixed, under 120 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 550 ℃, activation 0.5h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Embodiment 4
The phosphoric acid solution of 100g cedar sawdust with 150g concentration 30wt% mixed, under 140 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 500 ℃, activation 1.0h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Embodiment 5
The phosphoric acid solution of 100g cedar sawdust with 100g concentration 40wt% mixed, under 180 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 500 ℃, activation 1.5h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Embodiment 6
The phosphoric acid solution of 100g cedar sawdust with 100g concentration 45wt% mixed, under 140 ℃ lesser temps, carry out pre-treatment, behind the 6h, put into the porcelain crucible; In muffle furnace, be warming up to 500 ℃, activation 1.5h, cooling, washing is to neutral; Drying, crushing screening to 200 order is equipped with appearance.
Through the gac of method preparation of the present invention, the low temperature pre-treatment helps phosphoric acid in the inner infiltration of wood material, promotes the activation of phosphoric acid, improves the absorption property of gac.

Claims (9)

1. a low temperature pre-treatment phosphoric acid legal system is equipped with process of active carbon, may further comprise the steps:
Cedar sawdust is mixed by 0.75~1.50 impregnating ratio with the phosphoric acid solution of concentration 30~60wt%, under 25~180 ℃ lesser temps, carry out pre-treatment, behind the 6h; Put into the porcelain crucible, in muffle furnace, be warming up to 350~550 ℃, activation O.5~2.0h; Cooling; Washing is to neutrality, drying, crushing screening to 200 order.
2. low temperature pre-treatment phosphoric acid legal system according to claim 1 is equipped with process of active carbon, and it is characterized in that: described pretreatment temperature is 80~180 ℃.
3. low temperature pre-treatment phosphoric acid legal system according to claim 2 is equipped with process of active carbon, and it is characterized in that: described pretreatment temperature is 140 ℃.
4. low temperature pre-treatment phosphoric acid legal system according to claim 1 is equipped with process of active carbon, and it is characterized in that: described activation temperature is 450~550 ℃.
5. low temperature pre-treatment phosphoric acid legal system according to claim 4 is equipped with process of active carbon, and it is characterized in that: described activation temperature is 500 ℃.
6. low temperature pre-treatment phosphoric acid legal system according to claim 1 is equipped with process of active carbon, and it is characterized in that: described impregnating ratio is 0.75~1.25.
7. low temperature pre-treatment phosphoric acid legal system according to claim 6 is equipped with process of active carbon, and it is characterized in that: described impregnating ratio is 1.0.
8. low temperature pre-treatment phosphoric acid legal system according to claim 1 is equipped with process of active carbon, and it is characterized in that: described soaking time is 1.0~2.0h.
9. low temperature pre-treatment phosphoric acid legal system according to claim 8 is equipped with process of active carbon, and it is characterized in that: described soaking time is 1.5h.
CN2012102456575A 2012-07-16 2012-07-16 Method for preparing active carbon by low temperature pretreating with phosphoric acid Pending CN102786051A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288080A (en) * 2013-06-14 2013-09-11 中国石油大学(华东) Method for preparing high-mesopore-ratio high-adsorptivity ecological carbon
CN105748566A (en) * 2016-05-06 2016-07-13 中南林业科技大学 Cortex eucommiae extract slow-release agent
CN106276898A (en) * 2016-08-12 2017-01-04 南京林大活性炭有限公司 A kind of method utilizing urban landscaping rubbish to prepare agglomerated activated carbon
CN106744944A (en) * 2017-03-22 2017-05-31 山东省科学院能源研究所 In the method that phenol and quick superfreeze prepare modified activated carbon
CN107183019A (en) * 2017-06-01 2017-09-22 华中农业大学 A kind of compound bio charcoal base carrier and preparation method and application with pesticide slow-release performance
CN110156008A (en) * 2019-07-03 2019-08-23 太仓阳净环保科技有限公司 Phosphoric acid permeating method in phosphoric acid method wood activated charcoal production process
CN112705187A (en) * 2020-12-23 2021-04-27 同济大学 Carbon-based catalyst based on organic household garbage, preparation method of carbon-based catalyst, pyrolysis product prepared from carbon-based catalyst and used as fuel, and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1073925A (en) * 1991-12-30 1993-07-07 湖南省通道侗族自治县第一化工厂 Improving one's methods and equipment of producing active carbon by phosphoric acid method
CN102153082A (en) * 2011-04-25 2011-08-17 福建省将乐县乐洪活性炭有限公司 Method for preparing wood activated carbon by phosphoric acid method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1073925A (en) * 1991-12-30 1993-07-07 湖南省通道侗族自治县第一化工厂 Improving one's methods and equipment of producing active carbon by phosphoric acid method
CN102153082A (en) * 2011-04-25 2011-08-17 福建省将乐县乐洪活性炭有限公司 Method for preparing wood activated carbon by phosphoric acid method

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288080A (en) * 2013-06-14 2013-09-11 中国石油大学(华东) Method for preparing high-mesopore-ratio high-adsorptivity ecological carbon
CN103288080B (en) * 2013-06-14 2015-10-07 中国石油大学(华东) A kind ofly prepare the ecological carbon method that mesoporous is high, adsorptivity is strong
CN105748566A (en) * 2016-05-06 2016-07-13 中南林业科技大学 Cortex eucommiae extract slow-release agent
CN105748566B (en) * 2016-05-06 2020-02-07 中南林业科技大学 Eucommia ulmoides extract slow-release agent
CN106276898A (en) * 2016-08-12 2017-01-04 南京林大活性炭有限公司 A kind of method utilizing urban landscaping rubbish to prepare agglomerated activated carbon
CN106744944A (en) * 2017-03-22 2017-05-31 山东省科学院能源研究所 In the method that phenol and quick superfreeze prepare modified activated carbon
CN107183019A (en) * 2017-06-01 2017-09-22 华中农业大学 A kind of compound bio charcoal base carrier and preparation method and application with pesticide slow-release performance
CN110156008A (en) * 2019-07-03 2019-08-23 太仓阳净环保科技有限公司 Phosphoric acid permeating method in phosphoric acid method wood activated charcoal production process
CN112705187A (en) * 2020-12-23 2021-04-27 同济大学 Carbon-based catalyst based on organic household garbage, preparation method of carbon-based catalyst, pyrolysis product prepared from carbon-based catalyst and used as fuel, and method

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