CN1424460A - Lignin catalytic separating agent - Google Patents
Lignin catalytic separating agent Download PDFInfo
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- CN1424460A CN1424460A CN 01142344 CN01142344A CN1424460A CN 1424460 A CN1424460 A CN 1424460A CN 01142344 CN01142344 CN 01142344 CN 01142344 A CN01142344 A CN 01142344A CN 1424460 A CN1424460 A CN 1424460A
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- lignin
- separating agent
- sodium
- catalytic separating
- boiling
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Abstract
A catalytic separating agent of lignin for pulping is prepared from sodium sulfite, magnesium oxide, sodium phosphate, sodium sulfonate, aminosulfonic acid, penetrant, lotion and cellulose. Its advantages are high pulp output rate (75% or more), high quality of pulp, low cost and cylic use of black liquid.
Description
One, technical field
The invention belongs to paper-making industry, specifically is the compound lignin catalytic separating agent in a kind of pulping process.
Two, background technology
At present, in paper-making industry, generally, as auxiliary agent, after equipment boilings such as rotary spherical digester, must starch with anthraquinone, imonium to add caustic soda after the main raw material fragmentations such as straw, straw, bagasse, reed.This employing anthraquinone, imonium are bigger as the method alkali charge of digesting assistant, slurry yield is about 50%, actual digestion time is longer, and the black liquor thickness of its generation, the lignin content height is so black liquor can not recycle, cause certain pollution to environment, if carry out black liquor treatment, investment and operating cost are higher, and is economical inadequately.
Three, technology contents
The present invention be directed to the deficiencies in the prior art, can promote the lignin decomposition and dissolve the efficient lignin catalytic separating agent that effectively to protect fiber to improve slurry yield simultaneously thereby provide a kind of.
The present invention realizes with following technical proposal:
Lignin catalytic separating agent of the present invention is by sodium sulfite (Na
2SO
3), magnesia (MgO), sodium phosphate (Na
5P
3O
10), sodium sulfonate (NaHSO
3), sulfamic acid (NH
2SO
2OH), bleeding agent, detergent, cellulose combine.
Each constituent content of lignin catalytic separating agent of the present invention is as follows:
Sodium sulfite 15～25% magnesia 40～60%
Sodium phosphate 7～15% sodium sulfonates 2～9%
Sulfamic acid 3～7% bleeding agents 4～6%
Detergent 2～4% celluloses 3～4%
The present invention only needs above-mentioned component mixed in proportion and gets final product.
The present invention selects different percentage according to different plant materials.
In each component of the present invention, sodium sulfite and magnesia can make the lignin sulfonation, and sodium phosphate plays centrifugation; sodium sulfonate, sulfamic acid can be protected fiber effectively; make it not by the caustic soda oxidation, bleeding agent helps caustic soda to permeate to fibrous inside, the detergent aseptic.
The present invention can impel caustic soda to permeate to fibrous inside rapidly, promotes the decomposition of lignin and dissolves, and protect fiber effectively, and fiber is protected, and just few by the caustic soda oxidation, fiber oxidation is few, and slurry yield is just high; Adopt the black liquor that slurrying of the present invention produced more clear, and lignin content significantly reduces, black liquor can be recycled.
Lignin catalytic separating agent of the present invention is non-evaporatingly to boil, exempt to soak and can produce continuously with limewash, and the black liquor that is produced simultaneously can be recycled, and reaches zero discharging, compliance with environmental protection requirements; The present invention is owing to slurrying slurry yield height, and quality is good; If use this product and boiling simultaneously, can shorten digestion time 1/4.
Four, the specific embodiment
Embodiment 1: adopt lignin catalytic separating agent slurrying of the present invention (non-evaporating boiling);
Earlier raw material (straw, wheat straw, bagasse etc.) is advanced disintegrating machine (or pulverizer, kibbling mill) and carry out fragmentation, go into high density hydraulic pulper or melt pit after the fragmentation, add caustic soda in pulper or in the melt pit, lignin catalytic separating agent is heated, and makes temperature reach 100 degree, the real time that temperature reaches behind 100 degree can not be less than 30 minutes, blowing advances fiberizer after 30 minutes, and beating degree reaches more than 35 degree behind the defibrination, and slurry yield reaches (mao bamboon, timber slurry yield are higher than grass fiber) more than 75%.
Embodiment 2: adopt lignin catalytic separating agent slurrying of the present invention (boiling).
After caustic soda (50 kilograms of dry pulps per ton) and broken material all added, add 15 kilograms of lignin catalytic separating agents again, through boiling 2 hours (actual heating and heat preservation time) slurry yield more than 57%.
Embodiment 3: adopt lignin catalytic separating agent of the present invention and the effect of making digesting assistant with anthraquinone, imonium to be compared as follows:
One, make digesting assistant with anthraquinone, imonium, 200 kilograms in alkali of dry pulp per ton, 2 kilograms of anthraquinones, slurry yield 50%, the 3 hours time (actual intensification, temperature retention time), boiling hardness 15-17 (value in the Meng):
Make digesting assistant with lignin catalytic separating agent, 50 kilograms in alkali of dry pulp per ton, 15 kilograms of lignin catalytic separating agents, slurry yield is more than 57%, the 2 hours time (actual intensification, temperature retention time), boiling hardness 12-14 (value in the Meng), the bleaching whiteness is than adopting anthraquinone high 3-5 degree.
Two, coal consumption during boiling: anthraquinone, Ammonium Sulfite Method dry pulp per ton adopt lignin catalytic separating agent with 200 kilograms in coal with 400 kilograms in coal, descend 50%.
Three, in the black liquor that is produced with anthraquinone, Ammonium Sulfite Method boiling because the lignin content height, and black liquor thickness, can not recycle that (lignin of high-load will absorb the caustic soda that is added, thickness makes and forms barrier film between solid-liquid), pollute to environment, as carry out black liquor and handle, in the paper plant that produces per year below 20,000 tons, all can not accept on investment and operating cost, adopt the lignin release agent to make digesting assistant, the black liquor that is produced is more clear, lignin content is low, can be recycled, not only can not pollute, and the low little factory of annual production also can use and produce.
Embodiment 4: use relatively when adopting the present invention to use with non-evaporating boiling when boiling
Adopt lignin catalytic agent of the present invention not only can when boiling, use (as embodiment 2), also can when non-evaporating boiling, use (as embodiment 1), integrated cost is non-evaporating to be compared when boiling under the situation than boiling lowly more than 50%, and slurry yield is non-evaporating can reach more than 75% when boiling, and boiling is more than 57%.
Claims (3)
1, a kind of lignin catalytic separating agent is characterized in that, it is by sodium sulfite (Na
2SO
3), magnesia (MgO), sodium phosphate (Na
5P
3O
10), sodium sulfonate (NaHSO
3), sulfamic acid (NH
2SO
2OH), bleeding agent, detergent, cellulose combine.
According to the described lignin catalytic separating agent of claim 1, it is characterized in that 2, each constituent content is as follows:
Sodium sulfite 15～25%
Magnesia 40～60%
Sodium phosphate 7～15%
Sodium sulfonate 2～9%
Sulfamic acid 3～7%
Bleeding agent 4～6%
Detergent 2～4%
Cellulose 3～4%
Said components is mixed in proportion and is got final product.
3, according to the described lignin catalytic separating agent of claim 2, it is characterized in that:, select different percentage according to different plant materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142344 CN1424460A (en) | 2001-12-11 | 2001-12-11 | Lignin catalytic separating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142344 CN1424460A (en) | 2001-12-11 | 2001-12-11 | Lignin catalytic separating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1424460A true CN1424460A (en) | 2003-06-18 |
Family
ID=4676777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142344 Pending CN1424460A (en) | 2001-12-11 | 2001-12-11 | Lignin catalytic separating agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1424460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060598A (en) * | 2017-12-11 | 2018-05-22 | 安徽比伦生活用纸有限公司 | A kind of pulping agents used in paper for daily use processing |
-
2001
- 2001-12-11 CN CN 01142344 patent/CN1424460A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060598A (en) * | 2017-12-11 | 2018-05-22 | 安徽比伦生活用纸有限公司 | A kind of pulping agents used in paper for daily use processing |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |