CN104911939A - Low-liquor ratio bamboo material neutral sulfite cooking method - Google Patents
Low-liquor ratio bamboo material neutral sulfite cooking method Download PDFInfo
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- CN104911939A CN104911939A CN201510330868.2A CN201510330868A CN104911939A CN 104911939 A CN104911939 A CN 104911939A CN 201510330868 A CN201510330868 A CN 201510330868A CN 104911939 A CN104911939 A CN 104911939A
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- bamboo
- liquor ratio
- bamboo material
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
Abstract
The invention belongs to the technical field of pulping and papermaking, and discloses a low-liquor ratio bamboo material neutral sulfite cooking method. The method comprises the following specific steps: slicing up bamboo material for later use, then putting into a digester, wherein the liquid ratio is controlled to be (1:2)-(1:3), the dosage of cooking medicament (sulfite) is 15-20%, the heating time is 2-3h, the highest temperature is 155-175 DEG C, the heat preservation time is 3-5h, and bamboo pulp can be obtained after heat preservation is ended; collecting the pulp, collecting cooking and pulp washing waste liquor (red liquor), and extracting lignin sulfonate. According to the cooking method, required liquor ratio is low, water consumption is small, the operation is simple, pulp obtained by cooking is good in yield, the sulfonation degree of the lignin sulfonate extracted from the cooking waste liquor (red liquor) is relatively high, and the cooking method is economical and environmentally friendly.
Description
Technical field
The invention belongs to pulp and paper technology field, be specifically related to a kind of bamboo material neutral sulfite boiling method of low liquor ratio.
Background technology
World today's paper industry is all using timber as main raw material, but due to China be the country of a forest reserves relative shortage, so wood pulp for paper is seriously under-supply for a long time, the commercial wood pulp that import of having to every year is a large amount of.World's bamboo grove gross area about 1,400 ten thousand hm
2, and China's bamboo grove area reaches 5,000,000 hm
2above, account for more than 1/3 of world's bamboo grove area, output occupies the first in the world.Make full use of bamboo timber resource, be reasonably applied to pulp and paper industry, be conducive to the tense situation alleviating China's paper grade (stock) wood fiber raw material deficiency, and then reduce the external dependency degree of China's pulping and paper-making raw material.
Lignosulphonates are principal by product of sulfurous method slurrying, belong to renewable resource, develop that this is abundant and the resource of cheapness has important practical significance.The high molecular polymer that the relative molecular mass scope of a kind of complexity that lignosulphonates are made up of phenylpropyl alkyl derivatives hydrophobic framework and sulfonate radical and other hydrophilic radicals is very wide.Lignosulphonic acid molecules of salt contains the functional groups such as phenolic hydroxyl group, alcoholic extract hydroxyl group, carboxyl, carbonyl, sulfonic group, there is the surperficial physicochemical characteristics such as absorption dispersiveness, caking property, rheological characteristic and colloidal nature, be thus widely used in the fields such as agricultural, industrial equipment maintenance, building industry, petroleum industry, water treatment.Wherein hydroxyl and sulfonic group are flocculation functional groups, lignosulphonates macromolecules adsorption can be made at metal surface protection metal, play the effect of inhibition.Hydroxyl and sulfonic group make the large molecule of lignosulphonates have oleophylic and hydrophilic characteristic as hydrophilic radical again simultaneously simultaneously, as dye dispersant, can stop dye granule cohesion, and play the effect of stably dispersing by Coulomb repulsion and sterically hindered effect.Therefore, further investigation bamboo material sulfite pulping technique, improve the sulfonation degree of lignosulphonates in red liquid, tool is of great significance.
Summary of the invention
For solving the shortcoming and defect part of prior art, the object of the present invention is to provide a kind of bamboo material neutral sulfite boiling method of low liquor ratio, to promote making full use of the bamboo timber resource of China's abundant, making up the deficiency of China's paper grade (stock) wood raw material.
For achieving the above object, the present invention adopts following technical scheme:
A bamboo material neutral sulfite boiling method for low liquor ratio, comprises the following steps:
Bamboo material is cut into bamboo chip, after screening and removing impurities, obtains bamboo chip raw material for standby; The cooking liquor that combined acid is 2.0 ~ 5.0% is made into by soluble in water for boiling medicine sulphite;
Bamboo chip raw material and cooking liquor are put in boiling vessel, stirs or rotate 15 ~ 30min, bamboo chip raw material and cooking liquor being mixed, in 90 ~ 120min, is warmed up to 155 ~ 175 DEG C afterwards, insulation 120 ~ 180min; Collect slurry after boiling, and collect boiling and pulp washing waste liquid (i.e. red liquid), extract lignosulphonates.
Described bamboo material is one or more in the conventional Paper Making of Bamboo raw material such as cizu, mao bamboon, and bamboo wood mass dryness fraction scope is 90% ~ 95%.
Described bamboo material is cut into that length is 10 ~ 25mm, thickness is the bamboo chip of 2.5 ~ 7mm.
The original ph of described cooking liquor is 9.0 ~ 9.5.
Described sulphite is sodium sulfite.
Described sulphite consumption is 15 ~ 20% of bamboo chip raw material oven-dry weight quality, and liquor ratio is 1:2 ~ 1:3 (kg:L).
Described liquor ratio refers to the ratio of bamboo chip raw material oven-dry weight and the total liquid measure of boiling, and the total liquid measure of boiling comprises moisture contained in cooking liquor volume and bamboo chip raw material.
Described boiling vessel is comprise the one in rotary spherical digester, vertical digester and horizontal rotary digester.
The concrete steps of described extraction lignosulphonates comprise evaporation, concentrated, filter, dry and pulverize.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) the inventive method can make full use of the bamboo timber resource of China's abundant, and the deficiency making up China's paper grade (stock) timber resources provides reference.
(2) the inventive method can also extract the lignosulphonates had compared with highly sulfonated from cooking waste liquor (red liquid); to improve the serviceability of lignosulphonates; expand its range of application, reduce the discharge of liquid waste of pulping by sulfite process, protection of the environment.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
In the present invention to lignosulphonates sulfonation degree detection method be: ion-exchange-electrical conductivity titration, concrete steps are: carry out evaporation and concentration to debita spissitudo to the red liquid of gained after pulp washing, then cross cationic resin column and lignosulphonates are converted into lignin sulfonic acid, carry out conductimetric titration by standard caustic soda solution again, calculated the sulfonation degree of lignosulphonates by electrical conductivity-sodium hydroxide concentration curve map.
Embodiment 1
A bamboo material neutral sulfite boiling method for low liquor ratio, comprises the following steps:
Get the bamboo chip (over dry meter) of 300g length 10 ~ 25mm, thickness 2.5 ~ 7mm and mass dryness fraction 90% ~ 95%, put into the horizontal rotary digester of 4L;
Take sodium sulfite 45g, and be fully dissolved in appropriate water, obtain cooking liquor, then cooking liquor is joined in horizontal rotary digester; Liquor ratio is 1:2;
After digesting apparatus installs, running 15min first at normal temperatures, by rotating, raw material being mixed, intensification 90min, to 155 DEG C, is incubated 180min; Collect slurry after boiling, collect a certain amount of red liquid simultaneously, extract lignosulphonates.
After testing, the present embodiment bamboo pulp yield 50.2%, Kappa number 41, the sulfonation degree of the lignosulphonates of extraction is 2.2mmol/g.
Embodiment 2
A bamboo material neutral sulfite boiling method for low liquor ratio, comprises the following steps:
Get the bamboo chip (over dry meter) of 300g length 10 ~ 25mm, thickness 2.5 ~ 7mm and mass dryness fraction 90% ~ 95%, put into the horizontal rotary digester of 4L;
Take sodium sulfite 48g, and be fully dissolved in appropriate water, obtain cooking liquor, then cooking liquor is joined in horizontal rotary digester; Liquor ratio is 1:3;
After digesting apparatus installs, running 20min first at normal temperatures, by rotating, raw material being mixed, intensification 120min, to 165 DEG C, is incubated 120min; Collect slurry after boiling, collect a certain amount of red liquid simultaneously, extract lignosulphonates.
After testing, the present embodiment bamboo pulp yield 51.4%, Kappa number 43, the sulfonation degree of the lignosulphonates of extraction is 2.9mmol/g.
Embodiment 3
A bamboo material neutral sulfite boiling method for low liquor ratio, comprises the following steps:
Get the bamboo chip (over dry meter) of 300g length 10 ~ 25mm, thickness 2.5 ~ 7mm and mass dryness fraction 90% ~ 95%, put into the horizontal rotary digester of 4L;
Take sodium sulfite 60g, and be fully dissolved in appropriate water, obtain cooking liquor, then cooking liquor is joined in horizontal rotary digester; Liquor ratio is 1:3;
After digesting apparatus installs, running 30min first at normal temperatures, by rotating, raw material being mixed, intensification 120min, to 175 DEG C, is incubated 180min; Collect slurry after boiling, collect a certain amount of red liquid simultaneously, extract lignosulphonates.
After testing, the present embodiment bamboo pulp yield 48.9%, Kappa number 38, the sulfonation degree of the lignosulphonates of extraction is 2.4mmol/g.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. a bamboo material neutral sulfite boiling method for low liquor ratio, is characterized in that, comprise the following steps:
Bamboo material is cut into bamboo chip, after screening and removing impurities, obtains bamboo chip raw material for standby; The cooking liquor that combined acid is 2.0 ~ 5.0% is made into by soluble in water for boiling medicine sulphite;
Bamboo chip raw material and cooking liquor are put in boiling vessel, stirs or rotate 15 ~ 30min, bamboo chip raw material and cooking liquor being mixed, in 90 ~ 120min, is warmed up to 155 ~ 175 DEG C afterwards, insulation 120 ~ 180min; Collect slurry after boiling, and collect boiling and pulp washing waste liquid, extract lignosulphonates.
2. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, described bamboo material is for commonly using one or more in Paper Making of Bamboo raw material cizu or mao bamboon, and the mass dryness fraction scope of bamboo material is 90% ~ 95%.
3. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, described bamboo material is cut into that length is 10 ~ 25mm, thickness is the bamboo chip of 2.5 ~ 7mm.
4. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, the original ph of described cooking liquor is 9.0 ~ 9.5.
5. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, described sulphite is sodium sulfite.
6. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, described sulphite consumption is 15 ~ 20% of bamboo chip raw material oven-dry weight quality, and liquor ratio is 1:2 ~ 1:3.
7. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, described boiling vessel is rotary spherical digester, vertical digester or horizontal rotary digester.
8. the bamboo material neutral sulfite boiling method of a kind of low liquor ratio according to claim 1, is characterized in that, the concrete steps of described extraction lignosulphonates comprise evaporation, concentrated, filter, dry and pulverize.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421129A (en) * | 2015-12-04 | 2016-03-23 | 大连工业大学 | Method for preparing nano-crystalline cellulose by taking corn stalks as raw materials and application thereof |
| CN114960266A (en) * | 2022-06-16 | 2022-08-30 | 联盛纸业（龙海）有限公司 | Craft paper and preparation method thereof |
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| CN1613948A (en) * | 2004-11-18 | 2005-05-11 | 陈光荣 | Process for bamboo pulp black liquid binder and apparatus thereof |
| CN101274947A (en) * | 2008-03-05 | 2008-10-01 | 四川省高县华盛纸业有限公司 | Method for extracting lignosulphonate from sodium sulfite bamboo pulp waste liquor |
| CN102140173A (en) * | 2010-12-28 | 2011-08-03 | 新疆天宏纸业股份有限公司 | Method for producing sodium lignin sulfonate by using black liquor from pulping of reed containing sodium sulfite |
| CN103468834A (en) * | 2013-09-16 | 2013-12-25 | 南京林业大学 | Method for preparing xylooligosaccharide by treating plant fibers via neutral sulfite |
| WO2014094104A1 (en) * | 2012-12-18 | 2014-06-26 | Lignol Innovations Ltd. | Processes for recovery of derivatives of native lignin |
-
2015
- 2015-06-15 CN CN201510330868.2A patent/CN104911939B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613948A (en) * | 2004-11-18 | 2005-05-11 | 陈光荣 | Process for bamboo pulp black liquid binder and apparatus thereof |
| CN101274947A (en) * | 2008-03-05 | 2008-10-01 | 四川省高县华盛纸业有限公司 | Method for extracting lignosulphonate from sodium sulfite bamboo pulp waste liquor |
| CN102140173A (en) * | 2010-12-28 | 2011-08-03 | 新疆天宏纸业股份有限公司 | Method for producing sodium lignin sulfonate by using black liquor from pulping of reed containing sodium sulfite |
| WO2014094104A1 (en) * | 2012-12-18 | 2014-06-26 | Lignol Innovations Ltd. | Processes for recovery of derivatives of native lignin |
| CN103468834A (en) * | 2013-09-16 | 2013-12-25 | 南京林业大学 | Method for preparing xylooligosaccharide by treating plant fibers via neutral sulfite |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421129A (en) * | 2015-12-04 | 2016-03-23 | 大连工业大学 | Method for preparing nano-crystalline cellulose by taking corn stalks as raw materials and application thereof |
| CN114960266A (en) * | 2022-06-16 | 2022-08-30 | 联盛纸业（龙海）有限公司 | Craft paper and preparation method thereof |
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| CN104911939B (en) | 2017-06-06 |
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