CN101837973B - Preparation method of activated carbon by utilizing corncob hydrolysis residue - Google Patents
Preparation method of activated carbon by utilizing corncob hydrolysis residue Download PDFInfo
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- CN101837973B CN101837973B CN2009100199442A CN200910019944A CN101837973B CN 101837973 B CN101837973 B CN 101837973B CN 2009100199442 A CN2009100199442 A CN 2009100199442A CN 200910019944 A CN200910019944 A CN 200910019944A CN 101837973 B CN101837973 B CN 101837973B
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Abstract
The invention discloses a preparation method of activated carbon by utilizing corncob hydrolysis residue, which belongs to the technical field of functional sugar production. The process comprises four steps of removing cellulose, carbonization-activation, washing and drying and grinding. The preparation process utilizes the corncob hydrolysis residue after enzymolysis by cellulase to prepare the activated carbon for producing xylose (or xylitol), which can not only meet the demands of self-production and reduce the production cost but also be sold as a commodity to acquire economic benefits directly, thus realizing a great leap from high residue discharge amount to zero discharge in the xylitol production, reducing the environmental protection pressure, creating economic benefits and meeting the national requirements of energy saving, emission reduction and sustainable development.
Description
Technical field
The invention belongs to technical field of functional sugar production, be specifically related to a kind of corn cob hydrolysis residue enzymolysis resistates and prepare Xylitol production process of active carbon.
Technical background
Xylitol is to be obtained through operations such as hydrolysis, purification, hydrogenation by corn cob, and in Xylitol was produced, the comprehensive utilization of corn cob hydrolysis residue was the difficult problem of Xylitol industry always.At present, domestic Xylitol production industry is annual can to produce a large amount of residues, if directly be discharged in the environment, will cause very big pollution and waste.Because of its main component is Mierocrystalline cellulose and xylogen,, in this series products process of production, also can produce 50% resistates so some enterprise is used for products such as producd fibers ethanol, L-lactic acid.Therefore fully utilize corn cob hydrolysis waste residue,, make its product innovation that becomes high added value, have huge economic, environmental value and far-reaching social effect by deep processing.
Xylitol is produced the special-purpose activated charcoal price up to 9000 yuan/ton now, and 1 ton of Xylitol of every production consumes gac 150kg, amounts to 1350 yuan of Renminbi.If the corn cob hydrolysis residue can be produced gac, not only can satisfy the needs of self producing, reduce production costs, can also directly increase economic efficiency as commodity selling, and realized Xylitol production by high waste sludge discharge amount to the zero-emission epoch-making great change of Xylitol industry high-volume.So not only comply with the energy-saving and emission-reduction policy that country advocates, and can create huge economic and social benefit.
At present, the domestic research report that has furfural dregs to produce activated carbon, but about utilizing the resistates of corn cob hydrolysis residue after enzymolysis removes Mierocrystalline cellulose to prepare gac, also do not find any report so far.
Summary of the invention
In order to overcome the deficiencies in the prior art, solve the low problem of corn cob residue utilization ratio in the xylose production, the invention provides a kind of technology of utilizing the corn cob hydrolysis residue to prepare gac, purpose is the effective trans-utilization problem that solves solid residue in wood sugar, the Xylitol production, to reduce the environmental protection pressure of industry, can create economic benefit again simultaneously.
The technical solution adopted in the present invention is to utilize corn cob hydrolysis residue enzymolysis resistates to prepare Xylitol production activated carbon, and its processing step is:
1, remove Mierocrystalline cellulose: measure the moisture content in the corn cob hydrolysis residue, add deionized water, by weight water: dry=8-12: 0.5-1.5 is made into suspension, adding is the sodium hydroxide solution of 15-25% by weight, transfer PH to 11-13, behind insulation 1-3h under 65-75 ℃, transfer PH to 3-5, press 500-3000IU/g and add cellulase, mixing speed is 100-360rpm, is incubated 30-70h, filtration or centrifugal down at 50-60 ℃, obtain enzymolysis resistates based on xylogen, standby.
2, carbonization-activation: the enzymolysis resistates based on xylogen that step 1 is obtained dries, and adding massfraction by solid-liquid volume ratio 0.5-1.5: 2-4 is 40% phosphoric acid solution, at 200-800 ℃ of following carbonization-activation 20-100min.
3, washing: use 65-80 ℃ clear water to wash 10-30min the carbonization-activation thing that step 2 obtains, to remove residual phosphorus, centrifugal or filtration, the gac that must clean.
4, oven dry is pulverized: the cleaning action charcoal that step 3 is obtained is at 55-65 ℃ of drying in oven 20-25h, is dried to have good flowability, pulverizes, and can require sieve according to the order number, promptly gets Xylitol production gac.
Gac with the present invention's preparation decolours to the corn cob hydrolyzed solution, and the transparency value of hydrolyzed solution just can be estimated the performance of gac before and after the contrast decolouring.
Positively effect of the present invention is the effective trans-utilization problem that has solved solid residue in present wood sugar, the Xylitol production, the corn cob hydrolysis residue is used for producing gac, the raw material corn cob is fully used, improved economic benefit, realized Xylitol production by high waste sludge discharge amount to the zero-emission epoch-making great change of Xylitol industry high-volume, reduce the environmental protection pressure of industry.
Embodiment
The present invention will be further described below in conjunction with specific embodiment.
Removing Mierocrystalline cellulose is this preparation technology's basic operation, in the specific implementation process, at first measure the moisture content in the corn cob hydrolysis residue, add deionized water, by water: dry matter=10: 1 is made into suspension, adding is 20% sodium hydroxide solution by weight, transfer PH to 12, behind insulation 2h under 70 ℃, transfer PH to 4, press 1500IU/g and add cellulase, mixing speed is 200rpm, is incubated 50h, filtration or centrifugal down at 55 ℃, the enzymolysis corn cob hydrolysis residue resistates that obtains promptly can be used as the raw material of producing gac, and is standby.
Embodiment 1:
Remove cellulosic enzymolysis corn cob slag resistates 50g, add in the 200ml beaker, adding massfraction by solid-liquid volume ratio 1: 3 is 40% phosphoric acid solution, in retort furnace in 400 ℃ of following carbonization-activation 120min, with 75 ℃ of clear water washing 20min, in 60 ℃ of baking ovens, behind the dry 24h, pulverize, screening obtains gac.Press 1% of corn cob hydrolyzed solution dry matter content and add gac, decolouring can make its transparence increase to about 62% from 7%.
Embodiment 2:
Remove cellulosic enzymolysis corn cob slag resistates 60g, add in the 200ml beaker, adding massfraction by body solid-liquid volume ratio 1: 1 is 60% phosphoric acid solution, in retort furnace in 500 ℃ of following carbonization-activation 80min, with 75 ℃ of clear water washing 20min, in 60 ℃ of baking ovens, behind the dry 24h, pulverize, screening obtains gac.Press 1% of corn cob hydrolyzed solution dry matter content and add gac, decolouring can make its transparence increase to about 66% from 7%.
Embodiment 3:
Remove cellulosic enzymolysis corn cob slag resistates 100g, add in the 200ml beaker, adding massfraction by body solid-liquid volume ratio 1: 2 is 85% phosphoric acid solution, in retort furnace in 450 ℃ of following carbonization-activation 80min, with 75 ℃ of clear water washing 10min, in 60 ℃ of baking ovens, behind the dry 24h, pulverize, screening obtains gac.Press 1% of corn cob hydrolyzed solution dry matter content and add gac, decolouring can make its transparence increase to about 75% from 7%.
Claims (1)
1. a technology of utilizing the corn cob hydrolysis residue to prepare gac is characterized in that this preparation technology utilizes corn cob hydrolysis residue enzymolysis resistates to prepare Xylitol production gac, and its processing step is:
(1) remove Mierocrystalline cellulose: measure the moisture content in the corn cob hydrolysis residue, add deionized water, by water: dry matter=8-12: 0.5-1.5 is made into suspension, adding is the sodium hydroxide solution of 15-25% by weight, transfer pH to 11-13, behind insulation 1-3h under 65-75 ℃, transfer pH to 3-5, press 500-3000IU/g and add cellulase, mixing speed is 100-360rpm, is incubated 30-70h, filtration or centrifugal down at 50-60 ℃, obtain enzymolysis resistates based on xylogen, standby;
(2) carbonization-activation: the enzymolysis resistates based on xylogen that step 1 is obtained dries, and adding massfraction by solid-liquid volume ratio 0.5-1.5: 2-4 is 40% phosphoric acid solution, at 200-800 ℃ of following carbonization-activation 20-100min;
(3) washing: use 65-80 ℃ clear water to wash 10-30min the carbonization-activation thing that step 2 obtains, to remove residual phosphoric, centrifugal or filtration, the gac that must clean;
(4) oven dry is pulverized: the gac of the cleaning that step 3 is obtained is dried to and has good flowability behind 55-65 ℃ of drying in oven 20-25h, pulverizes, and requires to sieve according to the order number, promptly gets Xylitol production gac.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100199442A CN101837973B (en) | 2009-03-20 | 2009-03-20 | Preparation method of activated carbon by utilizing corncob hydrolysis residue |
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| CN2009100199442A CN101837973B (en) | 2009-03-20 | 2009-03-20 | Preparation method of activated carbon by utilizing corncob hydrolysis residue |
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| CN101837973A CN101837973A (en) | 2010-09-22 |
| CN101837973B true CN101837973B (en) | 2011-12-28 |
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| CN104745734A (en) * | 2013-12-26 | 2015-07-01 | 济南圣泉集团股份有限公司 | Method and apparatus for preparation of xylose and combined production of active carbon |
| CN103923843B (en) * | 2014-04-22 | 2016-08-24 | 山东省科学院能源研究所 | The method utilizing fungus pretreatment xylose residue for improving activated carbon quality |
| CN104528719B (en) * | 2014-12-17 | 2017-02-22 | 中国林业科学研究院林产化学工业研究所 | Method for preparing activated carbon by using alkali xylose residues as raw material |
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| CN105502387B (en) * | 2015-12-18 | 2017-10-10 | 齐鲁工业大学 | The method that activated carbon is prepared using the corn cob residue after xylitol preparation technology |
| CN105384171B (en) * | 2015-12-18 | 2017-08-29 | 齐鲁工业大学 | The method for preparing activated carbon using the maize straw waste residue after xylitol preparation technology |
| CN105399872B (en) * | 2015-12-22 | 2018-06-15 | 齐鲁工业大学 | A kind of method and application using Jujun grasses Preparation of Activated Carbon with Lignin |
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| CN107142765A (en) * | 2017-07-05 | 2017-09-08 | 陈翀航 | A kind of extraction rice straw cellulose and its residue prepare the complete utilization method of activated carbon |
| CN107151013B (en) * | 2017-07-12 | 2019-02-05 | 吉林大学 | A method of porous carbon is prepared using resinol C |
| CN109037704B (en) * | 2018-07-09 | 2021-10-26 | 华南理工大学 | Nitrogen-doped 3D porous carbon material and preparation method and application thereof |
| CN113479878A (en) * | 2021-08-02 | 2021-10-08 | 玉山县三清活性炭有限公司 | Activated carbon product and phosphoric acid method activated carbon production method and equipment thereof |
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Patent Citations (2)
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| CN88101457A (en) * | 1988-03-17 | 1988-10-12 | 河南省新乡县中原化工厂 | The corn cob furfural dregs is made granulated active carbon |
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