CN85106333A - The mill by coacervation and precipitation of alkali and lignin in the black liquid - Google Patents
The mill by coacervation and precipitation of alkali and lignin in the black liquid Download PDFInfo
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- CN85106333A CN85106333A CN 85106333 CN85106333A CN85106333A CN 85106333 A CN85106333 A CN 85106333A CN 85106333 CN85106333 CN 85106333 CN 85106333 A CN85106333 A CN 85106333A CN 85106333 A CN85106333 A CN 85106333A
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- lignin
- alkali
- humic acid
- precipitation
- black liquid
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The mill by coacervation and precipitation of alkali and lignin in a kind of black liquid, it belongs to the chemical industry category.The present invention is with CaO or Ca (OH)
2As the coagulation agent, be added in the aqueous slkali of black liquor or humic acid, just can make the salt coagulation of lignin or humic acid.After filtration, gained filtrate is aqueous slkali, and the gained precipitation can be purified and is the salt of lignin or humic acid.The present invention can reclaim alkali, can reclaim lignin or humic acid again.
Description
The invention belongs to the chemical industry category.
At present, to the processing of the black liquid method recovery alkali wherein that adopt concentrated-cremate-causticization more.But this method can only reclaim alkali, and the lignin that economic worth is arranged in the black liquor in a large number is destroyed among the cremate, and this is not only a loss greatly, and has brought new pollution to atmosphere.This method investment simultaneously is big, cost height, the general unable employing of middle-size and small-size factory.
The present invention has overcome the deficiency of above method.With CaO or Ca(OH)
2As the coagulation agent, be added in the black liquor) because Ca(OH
2Solubility in water is less, and its solubility is littler in alkali lye, so Ca(OH)
2Be added on and easily produce Ca(OH in the black liquor)
2Colloid, the particulate positively charged of this colloid belongs to positive colloid.Coagulation mutually when electronegative lignin colloid is mixed in this colloid and the black liquor, gained filtrate is aqueous slkali after filtration, gained precipitates to purify and is the salt of lignin.Ca(OH)
2Adding, both do not consumed the alkali in the solution, can make the form aggregate and precipitate of lignin again with salt, reach from black liquor the purpose that not only reclaims alkali but also reclaim lignin.
Using this method, can be earlier that the clarification saturated limewater of black liquor 1%～5% is the coagulation agent with the volume, and can directly obtain purity after coagulation separates first is more than 95%, and quality is about 3% a black lignin sodium precipitation of black liquor.Get the above-mentioned black liquor completely that do not precipitate again, the milk of lime more than 5% or the fat lime powder that with the quality are black liquor again fully stir for the coagulation agent adds wherein, post precipitation filters, the filtrate of its clarification contains alkali about about 5%, its solid precipitation can obtain black lignin sodium once more through purifying, and quality is 2～3 times that directly obtain first.
This method also can be applied in the recovery of producing in the humic acid process alkali.
The inventive method is easy, and equipment is simple, small investment, and cost is low, and is not only good in economic efficiency, and solved the pollution to environment of black liquid and similar black liquor preferably.
Claims (1)
- Reclaim the method for alkali from black liquid or humic acid aqueous slkali, the principal character of this method is with CaO or Ca (OH) 2As the coagulation agent, be added in the aqueous slkali of black liquid or humic acid, make the salt of lignin or the salt coagulation of humic acid, after filtration, institute's obtain filtrate is an aqueous slkali, the gained precipitation can be purified and is the salt of lignin or humic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85106333 CN85106333A (en) | 1985-08-19 | 1985-08-19 | The mill by coacervation and precipitation of alkali and lignin in the black liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85106333 CN85106333A (en) | 1985-08-19 | 1985-08-19 | The mill by coacervation and precipitation of alkali and lignin in the black liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85106333A true CN85106333A (en) | 1987-02-18 |
Family
ID=4795018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85106333 Pending CN85106333A (en) | 1985-08-19 | 1985-08-19 | The mill by coacervation and precipitation of alkali and lignin in the black liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85106333A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306153A (en) * | 2013-06-25 | 2013-09-18 | 山东福田药业有限公司 | Method for co-producing dissolving pulp and lignin through bagasse pith |
| CN103320099A (en) * | 2013-06-13 | 2013-09-25 | 中国石油集团西部钻探工程有限公司 | Petroleum drilling fluid viscosity reducing agent as well as preparation method and application method thereof |
| CN103771611A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Solid-liquid separation method of cellulosic ethanol fermentation waste liquid |
| CN107503213A (en) * | 2011-09-05 | 2017-12-22 | 斯托拉恩索公司 | The hardwood black liquor for handling the method for hardwood black liquor and being handled according to this method |
| CN112755969A (en) * | 2021-01-06 | 2021-05-07 | 广西大学 | Preparation method of calcium lignin organic anion adsorbent |
-
1985
- 1985-08-19 CN CN 85106333 patent/CN85106333A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503213A (en) * | 2011-09-05 | 2017-12-22 | 斯托拉恩索公司 | The hardwood black liquor for handling the method for hardwood black liquor and being handled according to this method |
| CN103771611A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Solid-liquid separation method of cellulosic ethanol fermentation waste liquid |
| CN103771611B (en) * | 2012-10-23 | 2015-09-02 | 中国石油化工股份有限公司 | The solid-liquid separating method of cellulose alcoholic fermentation waste liquid |
| CN103320099A (en) * | 2013-06-13 | 2013-09-25 | 中国石油集团西部钻探工程有限公司 | Petroleum drilling fluid viscosity reducing agent as well as preparation method and application method thereof |
| CN103306153A (en) * | 2013-06-25 | 2013-09-18 | 山东福田药业有限公司 | Method for co-producing dissolving pulp and lignin through bagasse pith |
| CN103306153B (en) * | 2013-06-25 | 2015-08-12 | 山东福田药业有限公司 | Sugarcane marrow produces the method for dissolving pulp lignin co-production |
| CN112755969A (en) * | 2021-01-06 | 2021-05-07 | 广西大学 | Preparation method of calcium lignin organic anion adsorbent |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |