CN101456555A - Method for preparing high mode number waterglass and active carbon by rice hull ash - Google Patents
Method for preparing high mode number waterglass and active carbon by rice hull ash Download PDFInfo
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- CN101456555A CN101456555A CNA2008101070684A CN200810107068A CN101456555A CN 101456555 A CN101456555 A CN 101456555A CN A2008101070684 A CNA2008101070684 A CN A2008101070684A CN 200810107068 A CN200810107068 A CN 200810107068A CN 101456555 A CN101456555 A CN 101456555A
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Abstract
The invention relates to a method for preparing high-mode water glass and activated carbon from rice husk ash, which is characterized by comprising: micro-milling, heating of an alkali liquor, reaction, filtration, washing by boiling water, acid leaching, filtration and washing, drying, secondary activation, water washing, drying, and crushing. The method has the advantages that the method adopts the rice husk ash as a raw material to prepare the activated carbon, and the rice husk ash not only has low cost but also dose not contain harmful substances, so that the method fully and comprehensively utilizes rice husks, and not only achieves the aim of using waste materials as resources but also protects the environment.
Description
Technical field
The present invention relates to a kind of preparation soluble glass of high modulus and process of active carbon, relate in particular to and a kind ofly prepare soluble glass of high modulus and process of active carbon with rice hull ash.
Background technology
Rice husk is after perfect combustion, and its ash content contains SiO
2About 95%, can be used as and produce the water glass raw material, rice husk unburn part mainly is hollow cancellated C, it is a desirable feedstock of producing gac.China is Rice Production big country, and rice husk accounts for the 18%-22% of paddy kernel weight, for one of main byproduct of cereal processing, is a kind of inexpensive renewable resources that has a large capacity and a wide range.Rice husk is mostly as the primary fuel utilization at present, and the rice husk density of generation is little, volume is big, and environment has been caused pollution.
With the rice husk is raw material, preparation water glass and gac after reclaiming heat, except the rice husk raw material sources wide, outside the low price, also contain 20% the silicon-dioxide of having an appointment in the rice husk, studies show that through relevant: after the rice husk perfect combustion, most of organism is burnt, and contains the silicon-dioxide of 85%-90% in its ash content.Rice husk has good toughness, porousness, low density (112-144kg/m
3), character such as high heating value (13.44-15.54MJ/kg) and quality be coarse, have some special purposes industrial, all be feasible from still being worth economically from scientific research.
Owing to do not contain the heavy metal that arsenic, lead etc. are harmful to health in the rice hull ash, got rid of the pollution of agricultural chemicals etc. again through burning, so the water glass with the rice hull ash preparation is raw material, products such as the white carbon black that further processing obtains, silica gel not only cost reduce, quality also is improved, and is particularly useful for industry such as food, medicine.
By extracting SiO in the rice hull ash
2The existing bibliographical information of the research work of preparation gac, water glass, white carbon black, but all be based on the processing method of single product, produce gac with rice hull ash as raw material, not only cost is low, and do not contain harmful impurity (as plumbous, arsenic), and being particularly suitable for the demand in the foodstuffs industry, market potential is huge.The present invention adopts alkaline extraction to extract water glass from rice hull ash, as the raw material of producing white carbon black of nano level and the white carbon black of high purity, and provides foundation for its suitability for industrialized production with it; Filter residue is handled, prepared the gac of gel powder with high adsorptive.Rice husk is fully utilized fully, and environment is protected in both utilizations of waste as resource again, meets the national sustainable development policy.
Summary of the invention
The object of the present invention is to provide and a kind ofly prepare soluble glass of high modulus and process of active carbon with rice hull ash, the rice hull ash of this method after with recovered energy is raw material, adopt chemical precipitation method to prepare water glass and filter residue, filter residue is produced the activated carbon product of gel powder with high adsorptive through the high-temperature activation aftertreatment.
The present invention is achieved in that and it is characterized in that the processing method step is:
1, micro mist is broken: with pulverising mill rice husk is pulverized 30-50min, cross 100 mesh sieves.
2, add heat alkali liquid: the solution with NaOH is configured to 2mol/L is heated to boiling.
3, reaction: take by weighing the reactor that a certain amount of rice hull ash places the band stirring rake, add the alkali lye that boils, reaction 3-6h.
4, filter: filter after question response is complete, obtain filtrate and filter residue, filtrate is water glass, and filter residue is for making the raw material of gac.
5, boiling water washing: boil the filter residue of washing suction filtration at twice with a certain amount of distilled water that boils.
6, acidleach: above-mentioned filter residue is embathed 2h with 1.5% hydrochloric acid.
7, filtration washing: with the filter residue after the distilled water wash acidleach to pH value is 5.5-7.0.
8, drying: put into the baking oven attemperation and be baking 2h for 105 ℃.
9, re-activation: the solution that earlier KOH is mixed with 20%-40% joins in the dried gac, earlier with moisture evaporation, and high temperature in retort furnace (being about 600-650 ℃) activation 20-40min,
10, washing: fully be washed to neutrality to there not being KOH.
11, drying: put into the baking oven attemperation and be baking 4h for 105 ℃.
12, pulverize: pulverize 30-50min with supper micron mill earlier, filter with 200 purpose sieves again and can obtain gac.
Technique effect of the present invention is: produce gac with rice hull ash as raw material, not only cost is low, and does not contain harmful impurity, and rice husk is fully utilized fully, and environment is protected in both utilizations of waste as resource again.
Embodiment
Embodiment is:
The rice hull ash 40g that takes by weighing through micronizing places round-bottomed flask, then by solid-to-liquid ratio 2:5 (solid masses: liquid volume), promptly pour the NaOH solution that the 100ml concentration of boiling is 2mol/l into, on round-bottomed flask, load onto condensation reflux unit, place boiling water bath to react 4h round-bottomed flask, question response finishes to use immediately the filter flask suction filtration, wash twice with the deionization poach that 200ml boils, reclaim merging filtrate, filter residue is earlier with 1.5% salt acid soak 2h, be washed with water to neutrality, put 105 ℃ of oven dry of baking oven 12h.The modulus of water glass that is prepared by above process can reach 3.5 ~ 3.6.The filter residue that obtains drying with said process is that 20% KOH solution activates with concentration again, activation temperature is 800 ℃, activation 30min, being washed to does not have alkalescence and gets final product again, and drying, micronizing, sieving to prepare the gac that methylene blue adsorption value is 16.92ml/0.1g.
Claims (1)
1, a kind ofly prepare soluble glass of high modulus and process of active carbon, it is characterized in that the processing method step is with rice hull ash:
(1) micro mist is broken: with pulverising mill rice husk is pulverized 30-50min, cross 100 mesh sieves;
(2) add heat alkali liquid: the solution with NaOH is configured to 2mol/L is heated to boiling;
(3) reaction: take by weighing the reactor that a certain amount of rice hull ash places the band stirring rake, add the alkali lye that boils, reaction 3-6h;
(4) filter: filter after question response is complete, obtain filtrate and filter residue, filtrate is water glass, and filter residue is for making the raw material of gac;
(5) boiling water washing: boil the filter residue of washing suction filtration at twice with a certain amount of distilled water that boils;
(6) acidleach: above-mentioned filter residue is embathed 2h with 1.5% hydrochloric acid;
(7) filtration washing: with the filter residue after the distilled water wash acidleach to pH value is 5.5-7.0;
(8) drying: put into the baking oven attemperation and be baking 2h for 105 ℃;
(9) re-activation: the solution that earlier KOH is mixed with 20%-40% joins in the dried gac, and earlier with moisture evaporation, temperature is about 600-650 ℃ of activation 20-40min in retort furnace;
(10) washing: fully be washed to neutrality to there not being KOH;
(11) drying: put into the baking oven attemperation and be baking 4h for 105 ℃;
(12) pulverize: pulverize 30-50min with supper micron mill earlier, filter with 200 purpose sieves again and can obtain gac.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101070684A CN101456555A (en) | 2008-09-04 | 2008-09-04 | Method for preparing high mode number waterglass and active carbon by rice hull ash |
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| CNA2008101070684A CN101456555A (en) | 2008-09-04 | 2008-09-04 | Method for preparing high mode number waterglass and active carbon by rice hull ash |
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| CN101456555A true CN101456555A (en) | 2009-06-17 |
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| CNA2008101070684A Pending CN101456555A (en) | 2008-09-04 | 2008-09-04 | Method for preparing high mode number waterglass and active carbon by rice hull ash |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891189A (en) * | 2010-08-13 | 2010-11-24 | 宁乡县亮之星米业有限公司 | Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls |
| CN101913601A (en) * | 2010-08-13 | 2010-12-15 | 宁乡县亮之星米业有限公司 | Method for separating carbon from silicon in rice husk carbon |
| WO2011000233A1 (en) * | 2009-06-29 | 2011-01-06 | 湖南益阳粒粒晶粮食购销有限公司 | Comprehensive utilization method of rice hull for producing active carbon, rice hull tar and water glass or silicon phosphate |
| CN102515156A (en) * | 2011-12-23 | 2012-06-27 | 吉林大学 | Simple method for synchronous preparation of water glass and activated carbon with rice husk pyrolyzed ash |
| CN102826562A (en) * | 2012-09-14 | 2012-12-19 | 天津理工大学 | Method for preparing water glass by utilizing waste lead-containing glass and separating lead-containing compound |
| CN103496697A (en) * | 2013-09-30 | 2014-01-08 | 四川大学 | Method for preparing activated carbon by utilizing rice hull pyrolytic carbon |
| CN103803559A (en) * | 2014-01-17 | 2014-05-21 | 江西恒隆实业有限公司 | Processing technology for white carbon black with low water content |
| CN103904328A (en) * | 2014-04-01 | 2014-07-02 | 华南师范大学 | Preparation method of biomass lamella carbon material and application |
| CN105197928A (en) * | 2015-09-30 | 2015-12-30 | 江苏通瑞环保科技发展有限公司 | Method for preparing high surface area activated carbons |
| CN105195091A (en) * | 2015-09-30 | 2015-12-30 | 江苏通瑞环保科技发展有限公司 | Preparation method of activated carbon absorbing agent for absorbing low-concentration hydrogen sulfide |
| CN105271220A (en) * | 2015-09-30 | 2016-01-27 | 江苏通瑞环保科技发展有限公司 | Method for preparing activated carbon by utilization of crop straw |
| CN106116294A (en) * | 2016-06-26 | 2016-11-16 | 周荣 | A kind of preparation method of energy-saving heat-insulating composite construction material |
| CN106744953A (en) * | 2016-12-22 | 2017-05-31 | 济南大学 | A kind of classifying porous active carbon electrode material without method for preparing template |
| CN107159169A (en) * | 2017-05-19 | 2017-09-15 | 溧阳市鸿智新材料科技有限公司 | A kind of absorption filtering material of low soluble iron ion and preparation method thereof |
| CN108483455A (en) * | 2018-03-22 | 2018-09-04 | 益海（佳木斯）粮油工业有限公司 | A kind of rice hull ash promoting biomass white carbon performance |
| CN109499301A (en) * | 2018-11-29 | 2019-03-22 | 北京工业大学 | A kind of method that rice hull ash cooperates with progress dry-process cement rotary kiln dore furnace denitrating flue gas with coal dust |
| CN111109299A (en) * | 2019-12-24 | 2020-05-08 | 阙金龙 | Preparation method of algistat containing ginkgo endophyte |
| CN112778743A (en) * | 2021-02-01 | 2021-05-11 | 卢建平 | High-content carbon black master batch and preparation method thereof |
| CN114634184A (en) * | 2020-12-16 | 2022-06-17 | 安徽进化硅纳米材料科技有限公司 | Biomass utilization method |
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2008
- 2008-09-04 CN CNA2008101070684A patent/CN101456555A/en active Pending
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011000233A1 (en) * | 2009-06-29 | 2011-01-06 | 湖南益阳粒粒晶粮食购销有限公司 | Comprehensive utilization method of rice hull for producing active carbon, rice hull tar and water glass or silicon phosphate |
| CN101891189A (en) * | 2010-08-13 | 2010-11-24 | 宁乡县亮之星米业有限公司 | Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls |
| CN101913601A (en) * | 2010-08-13 | 2010-12-15 | 宁乡县亮之星米业有限公司 | Method for separating carbon from silicon in rice husk carbon |
| CN101891189B (en) * | 2010-08-13 | 2011-11-23 | 宁乡县亮之星米业有限公司 | Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls |
| CN101913601B (en) * | 2010-08-13 | 2012-06-27 | 宁乡县亮之星米业有限公司 | Method for separating carbon from silicon in rice husk carbon |
| CN102515156A (en) * | 2011-12-23 | 2012-06-27 | 吉林大学 | Simple method for synchronous preparation of water glass and activated carbon with rice husk pyrolyzed ash |
| CN102515156B (en) * | 2011-12-23 | 2014-06-11 | 吉林大学 | Simple method for synchronous preparation of water glass and activated carbon with rice husk pyrolyzed ash |
| CN102826562A (en) * | 2012-09-14 | 2012-12-19 | 天津理工大学 | Method for preparing water glass by utilizing waste lead-containing glass and separating lead-containing compound |
| CN103496697A (en) * | 2013-09-30 | 2014-01-08 | 四川大学 | Method for preparing activated carbon by utilizing rice hull pyrolytic carbon |
| CN103803559A (en) * | 2014-01-17 | 2014-05-21 | 江西恒隆实业有限公司 | Processing technology for white carbon black with low water content |
| CN103904328A (en) * | 2014-04-01 | 2014-07-02 | 华南师范大学 | Preparation method of biomass lamella carbon material and application |
| CN103904328B (en) * | 2014-04-01 | 2016-04-27 | 华南师范大学 | A kind of preparation method of biomass lamella material with carbon element and application thereof |
| CN105195091A (en) * | 2015-09-30 | 2015-12-30 | 江苏通瑞环保科技发展有限公司 | Preparation method of activated carbon absorbing agent for absorbing low-concentration hydrogen sulfide |
| CN105271220A (en) * | 2015-09-30 | 2016-01-27 | 江苏通瑞环保科技发展有限公司 | Method for preparing activated carbon by utilization of crop straw |
| CN105197928A (en) * | 2015-09-30 | 2015-12-30 | 江苏通瑞环保科技发展有限公司 | Method for preparing high surface area activated carbons |
| CN105195091B (en) * | 2015-09-30 | 2018-05-18 | 江苏通瑞环保科技发展有限公司 | A kind of preparation method of acticarbon for adsorption of Low Concentration hydrogen sulfide |
| CN106116294A (en) * | 2016-06-26 | 2016-11-16 | 周荣 | A kind of preparation method of energy-saving heat-insulating composite construction material |
| CN106744953A (en) * | 2016-12-22 | 2017-05-31 | 济南大学 | A kind of classifying porous active carbon electrode material without method for preparing template |
| CN107159169A (en) * | 2017-05-19 | 2017-09-15 | 溧阳市鸿智新材料科技有限公司 | A kind of absorption filtering material of low soluble iron ion and preparation method thereof |
| CN108483455A (en) * | 2018-03-22 | 2018-09-04 | 益海（佳木斯）粮油工业有限公司 | A kind of rice hull ash promoting biomass white carbon performance |
| CN109499301A (en) * | 2018-11-29 | 2019-03-22 | 北京工业大学 | A kind of method that rice hull ash cooperates with progress dry-process cement rotary kiln dore furnace denitrating flue gas with coal dust |
| CN111109299A (en) * | 2019-12-24 | 2020-05-08 | 阙金龙 | Preparation method of algistat containing ginkgo endophyte |
| CN114634184A (en) * | 2020-12-16 | 2022-06-17 | 安徽进化硅纳米材料科技有限公司 | Biomass utilization method |
| CN114634184B (en) * | 2020-12-16 | 2023-07-14 | 安徽进化硅纳米材料科技有限公司 | Utilization method of biomass |
| CN112778743A (en) * | 2021-02-01 | 2021-05-11 | 卢建平 | High-content carbon black master batch and preparation method thereof |
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Open date: 20090617 |