CN1397684A - Method for treating and comprehensively utilizing black liquor of alkaline pulping and paper making - Google Patents
Method for treating and comprehensively utilizing black liquor of alkaline pulping and paper making Download PDFInfo
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- CN1397684A CN1397684A CN 01114587 CN01114587A CN1397684A CN 1397684 A CN1397684 A CN 1397684A CN 01114587 CN01114587 CN 01114587 CN 01114587 A CN01114587 A CN 01114587A CN 1397684 A CN1397684 A CN 1397684A
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- black liquor
- lignin
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004537 pulping Methods 0.000 title claims abstract description 11
- 229920005610 lignin Polymers 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 239000003337 fertilizer Substances 0.000 claims abstract description 6
- 239000003516 soil conditioner Substances 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000005189 flocculation Methods 0.000 claims description 6
- 230000016615 flocculation Effects 0.000 claims description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000004480 active ingredient Substances 0.000 claims description 2
- 239000006228 supernatant Substances 0.000 abstract description 10
- 238000003756 stirring Methods 0.000 abstract description 7
- 239000000945 filler Substances 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 208000005156 Dehydration Diseases 0.000 abstract 1
- 239000000701 coagulant Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000008394 flocculating agent Substances 0.000 abstract 1
- 150000002894 organic compounds Chemical class 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000010902 straw Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical class Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 241000609240 Ambelania acida Species 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010905 bagasse Substances 0.000 description 2
- 235000013527 bean curd Nutrition 0.000 description 2
- 230000003851 biochemical process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009300 dissolved air flotation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000001814 protein method Methods 0.000 description 1
- -1 refractory organic Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Paper (AREA)
Abstract
A method for treating and comprehensively utilizing black liquor from pulping and papermaking by an alkaline process belongs to the regeneration of pulping alkali liquor. The method comprises the following steps: A. extracting black liquor, adding a flocculating agent accounting for 1-20% of the mass of the black liquor, and stirring for 2-5 minutes; B. adding coagulant aid with 1-25% of black liquor mass into the solution, stirring for 3-8 minutes, separating out lignin, and filtering out supernatant; C. after lignin is separated, carrying out dehydration treatment; D. the supernatant is utilized and treated according to different effective components. The method for treating the black liquor can realize the separation of organic matters such as lignin and the like in the black liquor within 5-10 minutes, not only realizes the zero emission of the papermaking black liquor, but also fully utilizes available resources in the black liquor, the lignin can be used as organic compound fertilizer, soil conditioner, filler and the like, and supernatant can be utilized and treated according to different enterprise requirements; can save a large amount of investment and land, has low operating cost, and is suitable for large, medium and small-sized alkaline pulping and papermaking enterprises.
Description
Technical field
The present invention relates to a kind of method of administering and fully utilizing black paper-making liquid of alkali pulping, belong to the regeneration class of slurrying alkali lye.
Background technology
China existing enterprises in pulp and paper industry more than 6700 families, industrial output has occupied the third place in the world, but average size of enterprises only has 4000T/a.Whole nation county and the above papermaking in county and paper products industry wastewater discharge account for 11% of national discharged volume of industrial waste water, and the CODcr that discharges in the waste water accounts for more than 40% of national total release.The main pollution of enterprises in pulp and paper industry is from black liquor (pulping waste liquor is called black liquor because of its look black), and pollutional load accounts for the 80-90% of full factory sewage in the black liquor.Black liquor composition complexity wherein contains and accounts for lignin, hemicellulose and the slurrying of pulping fibre raw material more than 50% with materials such as caustic soda.Major pollutants in the black liquor have suspended matter, easily biological-degradable organic matter, refractory organic, toxicant, acid-base material, pigment etc., and ecological environment is caused very serious harm.Working substance in the black liquor is a lot, contains 300,000 tons phosphorus, 500,000 tons potassium, 200,000 tons nitrogen and other numerous organic matter in the black liquor total amount of annual whole nation discharging, these elements in the black liquor, and a lot of local soil of present China is lacked just.China is existing ploughs 1,400,000,000 mu, and every year will be from the nearly 1,000,000 tons phosphate fertilizer of external import, potash fertilizer.Material in the black liquor is made full use of, can not only solve the pollution that black liquor causes, and can create good economic benefit and social benefit, the method for administering black liquor at present has Silvola recovery, electroosmose process, reverse osmosis platen press, lignin acidizing separation method, alkali lignin method, magnetization method, biochemical process, aluminum sulfate method, humic acid aluminium method, dissolved air flotation method, produces cement water reducing agent method, synthetic protein method etc.But there is not a kind of medium and small papermaking enterprise employing that is suitable for.For example Silvola recovery (firing method) is effective ways of administering black liquor pollution, but its construction investment is excessive, operating cost is too high, and medium and small papermaking enterprise can't bear.Some straw pulp enterprises adopts lignin acidizing separation ruling by law reason black liquor, but this method investment is big, floor space is big, running expense is high, and added sulfuric acid need add the alkali neutralization again, and organic matter such as lignin separates not exclusively, thereby it is extremely low to administer the job facilities operation ratio.Adopt biochemical process to handle black liquor, its shortcoming is that floor space is big, and the processing time is long, and it is low to purify compliance rate, and is subject to climatic effect, also is difficult to promote.Therefore, separating out the organic matters such as lignin in the black liquor effectively, is the fundamental way of administering black liquor.
Summary of the invention
The purpose of this invention is to provide a kind of special efficacy, cheapness, can administer the method for plurality of raw materials black paper-making liquid of alkali pulping such as wood pulp, bamboo pulp, reed pulp, Straw Pulp.Concrete steps are as follows: 1, extract black liquor: the boiling slurry is discharged the back from rotary spherical digester and is carried out the slurries separation by black liquor extraction equipment, and the black liquor of extraction is promoted to black liquor dosing reaction tank through fiber recovery, preliminary sedimentation with pump; 2, administer black liquor: in reaction tank, add the flocculant of black liquor quality 1%-20%, through about 2-5 minute, stir; The flocculation aid that adds black liquor quality 1%-25% again, stirred 3-8 minute, black liquor promptly solidifies separates out lignin, 3, the utilization of black liquor: with lignin separation, filter back gained clear filtrate and be supernatant and turn back to different production places according to the difference of its active ingredient: (1) contains the supernatant of alkali more than 85% can return the boiling slurry after treatment; (2) supernatant of pH value 8-12 returns the processing black liquor again; (3) supernatant of pH value 7-9 can be used for handling middle-stage wastewater; (4) supernatant of pH value 9-12 is used for the dust-remover water of paper mill boiler chimney.Lignin is as soil conditioner, fertilizer, filler etc.; Flocculant among the present invention is meant a kind of in Sodium Polyacrylate, cationic-type polyacrylamide, anion-polyacrylamide, non-ionic polyacrylamide, polyacrylamide olefines derivative, the acrylamide need be mixed with the aqueous solution that mass ratio is 0.1%-1%; Flocculation aid is a kind of in aluminium polychloride, modified polyaluminium chloride, poly-ferric chloride, PAFC, the calcium chloride; But calcium chloride only with flocculant in the collocation of Sodium Polyacrylate, acrylamide use; Flocculation aid need be mixed with the aqueous solution that mass ratio is 5%-20%.The mass ratio of the flocculant aqueous solution of black liquor and adding, the flocculation aid aqueous solution is: 1: 1%: 1%-1: 20%: 25%.The present invention's beneficial effect compared with prior art is: adopt this method to administer black liquor, usually in 5-10 minute, can realize organic polymerization sedimentation such as lignin in the black liquor and separate, not only realized the zero-emission of black liquid, and the available resources in the black liquor are fully used, the lignin of being separated out after treatment can be directly as organic composite fertilizer, soil conditioner, filler etc., and the supernatant after the separation can be done different the utilization according to enterprise demand and handle; Additive therefor prescription and manufacture method are simple, inexpensive, the wide material sources of raw material; Therefore can save great amount of investment and soil, and operating cost is cheap, is suitable for large, medium and small type soda pulping process papermaking enterprise and implements.
The specific embodiment
Embodiment 1
Under 30 ℃ of temperature, in 10 Baume degrees, PH is that to add concentration among 14 the reed pulp black liquor 1000kg be 1% sodium polyacrylate solution 20kg, stirs 2 minutes, adds concentration afterwards and be 20% calcium chloride solution 60kg, stirred 5 minutes, black liquor promptly solidifies separates out the flocculence lignin.After lignin separation come out, it is dark brown transparent that filtrate is that supernatant is, and pH value is 8, is used for handling black liquor again; Lignin can be made soil conditioner, fertilizer, filler etc. after dehydration;
Embodiment 2
Under 30 ℃ of temperature, in 11 Baume degrees, pH value is the cationic-type polyacrylamide solution 30kg that adds concentration 0.5% among 14 the straw pulp black liquor 1000kg, stirred 3-5 minute, add concentration afterwards and be 20% polymeric aluminum chlorides solution 60kg, stirred 5 minutes, black liquor promptly solidifies separates out the flocculence lignin.After lignin separation come out, filtrate was transparent, and the PH value is 7, is used to handle middle-stage wastewater, and the processing of lignin is with embodiment 1;
Embodiment 3
Under 30 ℃ of temperature, in 11 Baume degrees, pH value is the acrylamide solution 30kg that adds concentration 1% among 14 the straw pulp black liquor 1000kg, stirs 3 minutes, adds concentration afterwards and be 20% polymeric aluminum chlorides solution 60kg, stirred 5 minutes, black liquor promptly solidifies separates out jellied bean curd type lignin.After lignin separation come out, it is dark brown transparent that filtrate is, and pH value is 9, and as the dust-remover water of chimney, the processing of lignin is with embodiment 1.
Embodiment 4
Under 33 ℃ of temperature, in 7 Baume degrees, pH value is the sodium polyacrylate solution 20kg that adds concentration 1% among 12 the bagasse black liquor 1000kg, stir that to add concentration after 2 minutes again be 3% poly-ferric chloride solution 250kg, stirred 5 minutes, black liquor promptly solidifies separates out the flocculence lignin.After lignin separation come out, it is dark brown transparent that filtrate is, and pH value is 7, is used to handle middle-stage wastewater, and the processing of lignin is with embodiment 1;
Embodiment 5
Under 33 ℃ of temperature, in 7 Baume degrees, pH value is that to add concentration among 12 the bagasse black liquor 1000kg be 0.1% sodium polyacrylate solution 100kg, stirs 2 minutes, adds concentration afterwards and be 20% polymeric aluminum chlorides solution 50kg, stirred 5 minutes, black liquor i.e. weekization is separated out jellied bean curd type lignin.After lignin separation come out, it is dark brown transparent that filtrate is, and pH value is 9, and as the dust-remover water of chimney, the processing of lignin is with embodiment 1.
Claims (1)
1, a kind of method of administering and fully utilizing black paper-making liquid of alkali pulping, step is as follows:
A, extraction black liquor, the flocculant of adding black liquor quality 1%-20% stirred 2-5 minute; Described flocculant is meant a kind of in Sodium Polyacrylate, cationic-type polyacrylamide, anion-polyacrylamide, nonionic acrylamide, polyacrylamide olefines derivative, the acrylamide, and is mixed with the aqueous solution that mass ratio is 0.1%-1%;
B, the flocculation aid of the 1%-25% of black liquor quality is added in the above-mentioned solution, stirred again 3-8 minute, separate out lignin; Described flocculation aid is meant a kind of in aluminium polychloride, modified polyaluminium chloride, poly-ferric chloride, PAFC, the calcium chloride, and is mixed with the aqueous solution that mass ratio is 5%-20%;
After C, the lignin separation, make compoiste fertilizer, soil conditioner through processed;
D, the filtrate of isolating behind the lignin turn back to different production places according to the difference of its active ingredient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114587 CN1397684A (en) | 2001-07-13 | 2001-07-13 | Method for treating and comprehensively utilizing black liquor of alkaline pulping and paper making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114587 CN1397684A (en) | 2001-07-13 | 2001-07-13 | Method for treating and comprehensively utilizing black liquor of alkaline pulping and paper making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1397684A true CN1397684A (en) | 2003-02-19 |
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| CN 01114587 Pending CN1397684A (en) | 2001-07-13 | 2001-07-13 | Method for treating and comprehensively utilizing black liquor of alkaline pulping and paper making |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561085A (en) * | 2012-01-19 | 2012-07-11 | 河南省科学院化学研究所有限公司 | Technology for removing water insoluble matter in pulping black liquor |
| CN102603152A (en) * | 2012-03-08 | 2012-07-25 | 佛山市环保技术与装备研发专业中心 | Sludge deep dehydration conditioning agent and application thereof |
| CN102635011A (en) * | 2012-04-12 | 2012-08-15 | 谢明文 | Recycling comprehensive utilization technology for pulping black liquor or red liquor |
| CN102720086A (en) * | 2012-07-11 | 2012-10-10 | 山东博洋环境资源有限公司 | Paper making black liquor recycling zero discharge process adopting rotary membrane treatment |
| CN105733596A (en) * | 2016-03-21 | 2016-07-06 | 中国科学院烟台海岸带研究所 | Soil conditioner for passivation of heavy metals and preparation method of soil conditioner |
| CN108864441A (en) * | 2017-10-13 | 2018-11-23 | 济宁明升新材料有限公司 | A method of extracting lignin from reducing rules treatment fluid |
| CN108864440A (en) * | 2017-10-13 | 2018-11-23 | 济宁明升新材料有限公司 | A method of extracting lignin from alkaline pulping black liquor |
| CN108951251A (en) * | 2017-05-19 | 2018-12-07 | 济宁明升新材料有限公司 | A method of extracting separating lignin from dissolving pulp pre-cooked liquid |
| CN109293714A (en) * | 2018-09-04 | 2019-02-01 | 成都连接流体分离科技有限公司 | A kind of refining methd of high temperature wood hydrolysis liquid |
| CN110295510A (en) * | 2019-06-27 | 2019-10-01 | 大连工业大学 | A method of lignin crude product and liquid glucose are prepared using pulping and paper-making waste liquid |
| CN110894247A (en) * | 2018-09-12 | 2020-03-20 | 上海昶法新材料有限公司 | Method for extracting hemicellulose from pulping black liquor |
| CN110894248A (en) * | 2018-09-12 | 2020-03-20 | 上海昶法新材料有限公司 | Method for extracting hemicellulose from prehydrolysis liquid |
| WO2024040677A1 (en) * | 2022-08-23 | 2024-02-29 | 天津科技大学 | Chemical alkali recovery treatment process for chemimechanical pulping waste liquid |
-
2001
- 2001-07-13 CN CN 01114587 patent/CN1397684A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561085A (en) * | 2012-01-19 | 2012-07-11 | 河南省科学院化学研究所有限公司 | Technology for removing water insoluble matter in pulping black liquor |
| CN102603152A (en) * | 2012-03-08 | 2012-07-25 | 佛山市环保技术与装备研发专业中心 | Sludge deep dehydration conditioning agent and application thereof |
| CN102635011A (en) * | 2012-04-12 | 2012-08-15 | 谢明文 | Recycling comprehensive utilization technology for pulping black liquor or red liquor |
| CN102635011B (en) * | 2012-04-12 | 2013-10-23 | 谢明文 | Recycling comprehensive utilization technology for pulping black liquor or red liquor |
| CN102720086A (en) * | 2012-07-11 | 2012-10-10 | 山东博洋环境资源有限公司 | Paper making black liquor recycling zero discharge process adopting rotary membrane treatment |
| CN102720086B (en) * | 2012-07-11 | 2013-08-14 | 山东博洋环境资源有限公司 | Paper making black liquor recycling zero discharge process adopting rotary membrane treatment |
| CN105733596B (en) * | 2016-03-21 | 2019-03-12 | 中国科学院烟台海岸带研究所 | A kind of soil conditioner and preparation method thereof for heavy metal passivation |
| CN105733596A (en) * | 2016-03-21 | 2016-07-06 | 中国科学院烟台海岸带研究所 | Soil conditioner for passivation of heavy metals and preparation method of soil conditioner |
| CN108951251B (en) * | 2017-05-19 | 2021-04-06 | 济宁明升新材料有限公司 | Method for extracting and separating lignin from dissolving pulp precooking liquid |
| CN108951251A (en) * | 2017-05-19 | 2018-12-07 | 济宁明升新材料有限公司 | A method of extracting separating lignin from dissolving pulp pre-cooked liquid |
| CN108864440A (en) * | 2017-10-13 | 2018-11-23 | 济宁明升新材料有限公司 | A method of extracting lignin from alkaline pulping black liquor |
| CN108864441A (en) * | 2017-10-13 | 2018-11-23 | 济宁明升新材料有限公司 | A method of extracting lignin from reducing rules treatment fluid |
| CN109293714A (en) * | 2018-09-04 | 2019-02-01 | 成都连接流体分离科技有限公司 | A kind of refining methd of high temperature wood hydrolysis liquid |
| CN110894247A (en) * | 2018-09-12 | 2020-03-20 | 上海昶法新材料有限公司 | Method for extracting hemicellulose from pulping black liquor |
| CN110894248A (en) * | 2018-09-12 | 2020-03-20 | 上海昶法新材料有限公司 | Method for extracting hemicellulose from prehydrolysis liquid |
| CN110295510A (en) * | 2019-06-27 | 2019-10-01 | 大连工业大学 | A method of lignin crude product and liquid glucose are prepared using pulping and paper-making waste liquid |
| CN110295510B (en) * | 2019-06-27 | 2021-10-01 | 大连工业大学 | Method for preparing lignin crude product and sugar solution by using pulping and papermaking waste liquor |
| WO2024040677A1 (en) * | 2022-08-23 | 2024-02-29 | 天津科技大学 | Chemical alkali recovery treatment process for chemimechanical pulping waste liquid |
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