CN102583368A - Method for producing active carbon by recycling waste alkali - Google Patents
Method for producing active carbon by recycling waste alkali Download PDFInfo
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- CN102583368A CN102583368A CN2012100262062A CN201210026206A CN102583368A CN 102583368 A CN102583368 A CN 102583368A CN 2012100262062 A CN2012100262062 A CN 2012100262062A CN 201210026206 A CN201210026206 A CN 201210026206A CN 102583368 A CN102583368 A CN 102583368A
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Abstract
The invention discloses a method for producing active carbon by recycling waste alkali. The method comprises the following steps of: uniformly mixing carbon-containing precursor with KOH or NaOH according to the weight ratio of carbon-containing precursor to KOH or NaOH of 1:(3-10), rising the room temperature to 800-1000 DEG C, maintaining constant temperature for 1-3 hours, then naturally reducing the temperature to room temperature, taking out an activated product, adding water in the activated product to form paste according to the weight ratio of the activated product to water of 1:(3-10), carrying out solid-liquid separation, obtaining solid which is active carbon, refilling fresh KOH or NaOH into the obtained liquid with the refilled amount being equal to the weight ratio of the carbon-containing precursor to KOH or NaOH, then mixing with fresh carbon-containing precursor to carry out secondary activation with the activation process being same as the primary activation process, treating the activated product by a process same as the primary treatment process, by parity of reasoning, finishing recycling the waste alkali till the 8th-10th times, and changing to use fress KOH or the NaOH to restart another-period production. The method has the advantages that the production cost is reduced, the environmental-protection pressure of waste alkali treatment is relieved, and the recycling utilization of waste alkali is realized.
Description
Technical field
The invention belongs to a kind of production process of active carbon, provide a kind of salkali waste recycle production process of active carbon specifically.
Background technology
The preparation of super-activated carbon generally adopts highly basic such as KOH or NaOH to carry out activation to containing the charcoal precursor, contains a large amount of highly basic in the gac product after activation finishes, and this gac need wash just with a large amount of water can make super-activated carbon.Contain a large amount of highly basic (KOH+K2CO3 or NaOH+Na2CO3) in the washes, but this highly basic is not seen reports such as relevant processing and recycle in present existing document.
Document (" research that the discarded coke powder of KOH-K2CO3 activation prepares gac "; Black horse with white name and bright Liu Jie Feng Hui rosy clouds Zhang Deyi Zhang Jianqiang; Fuel and chemical industry, 2008 (39) 4,42-45) the middle KOH-K2CO3 composite activating agent that adopts; Discarded coke powder is carried out orthogonal experiment under different acvators and processing condition such as coke powder ratio, activation temperature, soak time, size, prepare active carbon with high specific surface area.Patent CN201010018317.X " a kind of preparation method of direct carbon conversion fuel cell gac " is to be that raw material is produced carbonized stock with biomass such as oak sawdust or bamboo chips; With K2CO3 or K2CO3 and KOH mixture is acvator, under 750～1000 ℃ of activation temperatures and nitrogen atmosphere, carbonized material is carried out activation and obtains gac.
That above-mentioned article and patent adopt is fresh KOH and K2CO3, rather than recycling the two.
Summary of the invention
The purpose of this invention is to provide a kind of highly basic that adopts the highly basic of products therefrom in the waste liquid that washing produces after containing the activation of charcoal precursor is carried out recycle production process of active carbon.
Concrete grammar of the present invention is following:
By containing carbon precursor and KOH or NaOH weight ratio is 1: (3-10), will contain carbon precursor and KOH or NaOH and mix, and be raised to 800-1000 ℃ of constant temperature 1-3 hour from room temperature; When cooling to room temperature naturally afterwards, taking out activation products, is 1 by the weight ratio of activation products and water: (3-10); After in activation products, adding water pulp thing, solid-liquid separation, the gained solid is a gac; Gained liquid is added fresh KOH or NaOH, and additional amount reaches the weight ratio that before contains carbon precursor and KOH or NaOH, is mixed into the secondary activation of row with the fresh carbon matrix precursor that contains afterwards; Activating process is with for the first time identical, and the processing of gained activation products is with for the first time identical, and the rest may be inferred; After the 8-10 time, finish the recycle of salkali waste, use the production that fresh KOH or NaOH restart another cycle instead.
The aforesaid carbon precursor that contains is refinery coke, coal, resol, corn straw, shell carbonized material, bamboo charcoal, coconut husk carbonized material, charred rice husk material.
Advantage of the present invention:
Adopt fresh KOH or NaOH when produce the first time of 1 period 1 of the present invention, but the waste liquid of last washing back generation capable of using during to secondary activation after adding fresh KOH or NaOH, carries out recycle.Significantly reduce production cost on the one hand, also greatly alleviated the environmental protection pressure that salkali waste is handled on the other hand, realized the recycle of salkali waste.
2 owing to use the direct retrieval system of salkali waste, makes that the pressure recovery of follow-up salkali waste is alleviated greatly, significantly reduced cost recovery.
Embodiment
Embodiment 1
With weight ratio is that 1: 10 hard coal and KOH mixes the back and be raised to 800 ℃ of constant temperature 3 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 10 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh KOH; Additional amount reaches the weight ratio 1: 10 of hard coal and KOH, is raised to 800 ℃ of constant temperature 3 hours from room temperature more afterwards with after fresh hard coal mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh KOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 10th time, finishes the recycle of salkali waste, uses the production that fresh KOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2900-3000m2/g.
Embodiment 2
With weight ratio is that 1: 3 refinery coke and KOH mixes the back and be raised to 1000 ℃ of constant temperature 1 hour from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 3 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh KOH; Additional amount reaches the weight ratio 1: 3 of refinery coke and KOH, is raised to 1000 ℃ of constant temperature 1 hour from room temperature more afterwards with after fresh refinery coke mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh KOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 8th time, finishes the recycle of salkali waste, uses the production that fresh KOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2400-2500m2/g.
Embodiment 3
With weight ratio is that 1: 8 resol and NaOH mixes the back and be raised to 900 ℃ of constant temperature 3 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 8 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh NaOH; Additional amount reaches the weight ratio 1: 3 of resol and NaOH, is raised to 900 ℃ of constant temperature 3 hours from room temperature more afterwards with after fresh resol mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh NaOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 9th time, finishes the recycle of salkali waste, uses the production that fresh NaOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 1900-2000m2/g.
Embodiment 4
With weight ratio is that 1: 6 corn straw carbonized material and NaOH mixes the back and be raised to 900 ℃ of constant temperature 3 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 8 according to the weight ratio of activation products and water; Solid-liquid separation, gained liquid is added fresh NaOH, and additional amount reaches the weight ratio 1: 6 of corn straw carbonized material and NaOH; Be raised to 900 ℃ of constant temperature 3 hours from room temperature more afterwards with after fresh corn straw carbonized material mixes; When cooling to afterwards naturally, take out activation products, carry out the solid-liquid separation second time near room temperature; Liquid after the separation is added fresh NaOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 10th time, finishes the recycle of salkali waste, uses the production that fresh NaOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2200-2300m2/g.
Embodiment 5
With weight ratio is that 1: 4 coconut husk carbonized material and KOH mixes the back and be raised to 900 ℃ of constant temperature 2 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 5 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh KOH; Additional amount reaches the weight ratio 1: 4 of coconut husk carbonized material and KOH, is raised to 900 ℃ of constant temperature 2 hours from room temperature more afterwards with after fresh coconut husk carbonized material mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh KOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 8th time, finishes the recycle of salkali waste, uses the production that fresh KOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2800-2900m2/g.
Embodiment 6
With weight ratio is that 1: 7 bamboo charcoal and NaOH mixes the back and be raised to 800 ℃ of constant temperature 1 hour from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 5 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh NaOH; Additional amount reaches the weight ratio 1: 7 of bamboo charcoal and NaOH, is raised to 800 ℃ of constant temperature 1 hour from room temperature more afterwards with after fresh bamboo charcoal mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh NaOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 9th time, finishes the recycle of salkali waste, uses the production that fresh NaOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2000-2110m2/g.
Embodiment 7
With weight ratio is that 1: 4 charred rice husk material and KOH mixes the back and be raised to 900 ℃ of constant temperature 3 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 5 according to the weight ratio of activation products and water, solid-liquid separation, gained liquid is added fresh KOH; Additional amount reaches the weight ratio 1: 4 of charred rice husk material and KOH, is raised to 900 ℃ of constant temperature 3 hours from room temperature more afterwards with after fresh charred rice husk material mixes, when cooling near room temperature afterwards naturally; Take out activation products; Carry out the solid-liquid separation second time, the liquid after the separation is added fresh KOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 8th time, finishes the recycle of salkali waste, uses the production that fresh KOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2600-2700m2/g.
Embodiment 8
With weight ratio is that 1: 10 shell carbonized material and NaOH mixes the back and be raised to 800 ℃ of constant temperature 2 hours from room temperature, when cooling to afterwards naturally near room temperature, and the taking-up activation products; After adding water pulp thing at 1: 10 according to the weight ratio of activation products and water; Solid-liquid separation, gained liquid is added fresh NaOH, and additional amount reaches the weight ratio 1: 10 of shell carbonized material and NaOH; Be raised to 800 ℃ of constant temperature 2 hours from room temperature more afterwards with after fresh shell carbonized material mixes; When cooling to afterwards naturally, take out activation products, carry out the solid-liquid separation second time near room temperature; Liquid after the separation is added fresh NaOH again, carries out reaction for the third time according to primary activation procedure.The rest may be inferred, after the 9th time, finishes the recycle of salkali waste, uses the production that fresh NaOH restarts another cycle instead.The specific surface area of the gac that at every turn makes is all between 2300-2400m2/g.
Claims (2)
1. a salkali waste recycle production process of active carbon is characterized in that comprising the steps:
By containing carbon precursor and KOH or NaOH weight ratio is 1: 3-10, and will contain carbon precursor and KOH or NaOH and mix, be raised to 800-1000 ℃ of constant temperature 1-3 hour from room temperature; When cooling to room temperature naturally afterwards, taking out activation products, is 1 by the weight ratio of activation products and water: 3-10; After in activation products, adding water pulp thing, solid-liquid separation, the gained solid is a gac; Gained liquid is added fresh KOH or NaOH, and additional amount reaches the weight ratio that before contains carbon precursor and KOH or NaOH, is mixed into the secondary activation of row with the fresh carbon matrix precursor that contains afterwards; Activating process is with for the first time identical, and the processing of gained activation products is with for the first time identical, and the rest may be inferred; After the 8-10 time, finish the recycle of salkali waste, use the production that fresh KOH or NaOH restart another cycle instead.
2. a kind of salkali waste recycle production process of active carbon as claimed in claim 1 is characterized in that the described carbon precursor that contains is refinery coke, coal, resol, corn straw, shell carbonized material, bamboo charcoal, coconut husk carbonized material or charred rice husk material.
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| CN2012100262062A CN102583368A (en) | 2012-01-19 | 2012-01-19 | Method for producing active carbon by recycling waste alkali |
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| CN2012100262062A CN102583368A (en) | 2012-01-19 | 2012-01-19 | Method for producing active carbon by recycling waste alkali |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274403A (en) * | 2013-06-08 | 2013-09-04 | 中国科学院山西煤炭化学研究所 | Method for recycling strong alkali in preparation process of active carbon having high specific surface area |
| CN103754869A (en) * | 2014-01-02 | 2014-04-30 | 上海大学 | Method for preparing high-quality active carbon by adopting waste polyurethane foamed plastic |
| CN105271219A (en) * | 2014-07-08 | 2016-01-27 | 高云 | Preparation process for straw active carbon |
| WO2017092077A1 (en) * | 2015-12-01 | 2017-06-08 | 浙江大学 | Method for preparing and forming koh solid-activated charcoal |
| CN109231204A (en) * | 2018-09-29 | 2019-01-18 | 华中科技大学 | A kind of method of biomass substep activation preparation porous charcoal |
| CN110078070A (en) * | 2019-04-11 | 2019-08-02 | 西安石油大学 | A kind of preparation method of the oily sludge base absorption carbon material for oily waste water treatment |
| US11351532B2 (en) * | 2018-07-30 | 2022-06-07 | Suzhou University of Science and Technology | Photocatalytic composite material and preparation method and application thereof |
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| CN101028925A (en) * | 2006-03-03 | 2007-09-05 | 中国人民解放军63971部队 | Process for producing super-activated carbon |
| CN101475168A (en) * | 2009-01-19 | 2009-07-08 | 中国科学院山西煤炭化学研究所 | Method for washing active carbon |
| CN101704526A (en) * | 2009-10-13 | 2010-05-12 | 李洪锡 | Method for producing white carbon black and active carbon by using residual rice hull ash after gasification |
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2012
- 2012-01-19 CN CN2012100262062A patent/CN102583368A/en active Pending
Patent Citations (3)
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| CN101028925A (en) * | 2006-03-03 | 2007-09-05 | 中国人民解放军63971部队 | Process for producing super-activated carbon |
| CN101475168A (en) * | 2009-01-19 | 2009-07-08 | 中国科学院山西煤炭化学研究所 | Method for washing active carbon |
| CN101704526A (en) * | 2009-10-13 | 2010-05-12 | 李洪锡 | Method for producing white carbon black and active carbon by using residual rice hull ash after gasification |
Non-Patent Citations (1)
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| 纪艳芬等: "石油焦制备高比表面积活性炭技术的研究", 《辽宁工业大学学报（自然科学版）》, vol. 31, no. 3, 30 June 2011 (2011-06-30), pages 168 - 170 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274403A (en) * | 2013-06-08 | 2013-09-04 | 中国科学院山西煤炭化学研究所 | Method for recycling strong alkali in preparation process of active carbon having high specific surface area |
| CN103754869A (en) * | 2014-01-02 | 2014-04-30 | 上海大学 | Method for preparing high-quality active carbon by adopting waste polyurethane foamed plastic |
| CN105271219A (en) * | 2014-07-08 | 2016-01-27 | 高云 | Preparation process for straw active carbon |
| WO2017092077A1 (en) * | 2015-12-01 | 2017-06-08 | 浙江大学 | Method for preparing and forming koh solid-activated charcoal |
| US11351532B2 (en) * | 2018-07-30 | 2022-06-07 | Suzhou University of Science and Technology | Photocatalytic composite material and preparation method and application thereof |
| CN109231204A (en) * | 2018-09-29 | 2019-01-18 | 华中科技大学 | A kind of method of biomass substep activation preparation porous charcoal |
| CN109231204B (en) * | 2018-09-29 | 2020-07-10 | 华中科技大学 | Method for preparing porous carbon by biomass step-by-step activation |
| CN110078070A (en) * | 2019-04-11 | 2019-08-02 | 西安石油大学 | A kind of preparation method of the oily sludge base absorption carbon material for oily waste water treatment |
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Application publication date: 20120718 |