CN1600989A - Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp - Google Patents
Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp Download PDFInfo
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- CN1600989A CN1600989A CN 200410050681 CN200410050681A CN1600989A CN 1600989 A CN1600989 A CN 1600989A CN 200410050681 CN200410050681 CN 200410050681 CN 200410050681 A CN200410050681 A CN 200410050681A CN 1600989 A CN1600989 A CN 1600989A
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Abstract
A process for preparing food packing paper and cultural paper with chlorine free bleached paper pulp includes using corn straw or its pitch free ones as raw material, then cutting, dust removing, presoaking, cooking and bleaching. The cooking reagent uses ammonium sulfite and potassium sulfite or sodium sulfite as main, sulfur or sulfourea as assistant and urea as well as sodium hydroxide as buffer. The bleaching is two sections or multisection bleaching by using urea or sulfourea to protect fibre and activate hydrogen peroxide.
Description
Technical field
The invention belongs to pulp and paper technology, particularly a kind ofly utilize cornstalk, remove the marrow cornstalk and make total chlorine free bleaching paper pulp, production and food, the direct or indirect food wrapper that contacts of human body and the technology of cardboard, cultural paper and cardboard.
Background technology
Paper industry adopts the long fiber needlebush usually, moderate fiber length leaf wood, bamboo, reed and staple fibre rice wheat straw etc. are the papermaking base stock, manufacturing technique adopts traditional chemical pulping method usually, mainly be alkaline process (comprise adding assistant anthraquinone etc. alkaline process) boiling and acid cooking technology, utilize alkali or acid to be main digestant; Neutral sodium sulfite method (Na
2SO
3Be digestant) and alkaline sodium sulfite method (Na
2SO
3Adding NaOH is digestant).The general hypochlorite single stage bleaching H that adopts is handled in bleaching; Chlorination C or chlorine dioxide D-alkali treatment E-hypochlorite H are C/D-E-H tri-stage bleaching technology, the industrial bleaching waste liquid that above-mentioned technical process produces contains organic chloride, as hypertoxic dioxin carcinogen, be difficult for purified treatment, this technique waste water serious harm ecological environment and human health.
The inventor had once invented with " urea process for making paper pulp ", No. the 1605th, invention patent certificate, but this method can only production true qualities paper pulp, paper and cardboard, be difficult to produce bleached pulp, paper and cardboard;
The present invention also once adopted " imonium-urea method slurrying ", was published in " paper technology communication " No.2 in 1977, P1-3, and equipment corrosion is more serious, the still difficult bleaching of paper pulp, bleaching back whiteness is lower;
The inventor carried out " removing the preliminary discussion of marrow cornstalk pulping and paper-making ", was published in " Liaoning papermaking " No.2 in 1997, P40-41, but its bleaching is traditional chlorine bleach that has.
The inventor obtains " a kind of method of utilizing cannabis total-bar to make total chlorine free bleaching paper pulp, paper and cardboard " patent of invention, letters patent book number No. 101043.The employed main digestant sulfur acid potassium of this patent of invention, rather than potassium sulfite or the sodium sulfite of containing of the present invention, its bleaching is the hydrogen peroxide bleaching of urea activation, and the present invention carries out simultaneously on this basis that oxygen is strengthened, alkali is strengthened, form oxygen and alkali is strengthened simultaneously, again with the bleaching of urea or sulphur urine activation hydrogen peroxide.
Also the someone declared " remove marrow cornstalk be raw material chlorine-free bleaching paper pulp making technology ", and application number 03111275.7 is conventional caustic soda-anthraquinone slurrying but it adopts, and digestant is not that ammonium sulfite and potassium sulfite are main.Sulphur also of no use or sulphur urine are buffer for digesting assistant, urea and NaOH.Two sections hydrogen peroxide bleachings that bleaching has used oxygen to strengthen, but do not emphasize hydrogen peroxide bleaching, bleaching activator urea yet of no use or the sulphur urine that alkali is strengthened.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing cornstalk to make total chlorine free bleaching pulp production food wrapper and cultural paper.This method after cut-out, dedusting, preimpregnation, enters boiling vessel with cornstalk, except that the marrow cornstalk is a raw material, and digestant is based on ammonium sulfite and potassium sulfite or sodium sulfite, and sulphur or sulphur urine are auxiliary agent, and urea and NaOH are the boiling technology of buffer innovation; Strengthen simultaneously with oxygen and alkali, urea or sulphur urine protection fiber activate two sections or multistage hydrogen peroxide bleaching of hydrogen peroxide again.On comprehensive basis, realize cornstalk and removed the boiling and the total chlorine free bleaching technology of the innovation of marrow cornstalk.
Each chemicals consumption wherein:
1, boiling: with ammonium sulfite and potassium sulfite or sodium sulfite is main digestant, and sulphur or sulphur urine are auxiliary agent, and urea and NaOH are buffer.
The boiling chemicals is to the over dry cornstalk or remove marrow cornstalk raw material weight percentage:
(NH
4)
2SO
3 10～45％
K
2SO
3 1.5～25％
(NH
2)
2CO 0～6％
S or (NH
2)
2SO 0.2～5%
NaOH 0～20％
Na
2SO
3 0～20％
Cooking schedule: liquor ratio 2.3～3.4,30～90 minutes heating-up times, be warming up to 145～185 ℃, be incubated 30～180 minutes.
2, bleaching: the hydrogen peroxide bleaching (PEOT) of that two sections or multistage oxygen and alkali are strengthened simultaneously, urea or the activation of sulphur urine:
The bleached chemical medicine to over dry unbleached pulp percentage is:
H
2O
2 0.8～5％
(NH
2)
2CO or (NH
2)
2SO 0.1～4%
Logical oxygen under oxygen pressure 0.1-0.7MPa
NaOH 1～10％
Na
2SiO
3 1～10％
MgSO
4 0.05～1.5％
Bleaching conditions: pulp density 6～20%, 55～95 ℃ of temperature, bleaching time 45～180 minutes.
Under this bleached chemical survival dose and bleaching conditions, according to product requirement, two sections can identical or differently be carried out association with pulp bleaching.Bleaching process can repeat by multistage.
3, according to product requirement, adopt 30%～100% cornstalk and remove marrow cornstalk total chlorine free bleaching paper pulp, proportioning 0～70% element-free chlorine and total chlorine free bleaching wood pulp or 0～70% non-wood pulp, secondary stock, production and food, direct or indirect food wrapper and cardboard, cultural paper and the cardboard that contacts of human body.
Adopting the agricultural by product cornstalk among the present invention, removing the marrow cornstalk is the pulping and paper-making raw material, utilize ammonium sulfite, chemical fertilizer such as potassium sulfite or sodium sulfite is main digestant, and sulphur or sulphur urine are auxiliary agent, and urea and NaOH are the sulphite method for making paper pulp of the innovation of buffer.Industrial wastes is a fertilizer, does not contain Toxic matter, contains digestant and brings nitrogen, potassium, nutritive salt and organic matter etc. with the cornstalk stripping into, is easy to biochemical treatment, and can fully utilizes, and helps environmental protection.Bleaching process utilizes the reinforcement simultaneously of oxygen and alkali, urea or sulphur urine protection fiber to activate hydrogen peroxide again; the Totally-chlorine-free bleaching technology of this synthetic innovation; not only improved the whiteness of total chlorine free bleaching paper pulp, and made its paper products not contain hypertoxic carcinogenic dioxin-like chemical.Realized total chlorine free bleaching production paper pulp, bleaching waste liquor and paper products do not contain organic chloride, as hypertoxic dioxin carcinogen, help improving the environment-friendly quality of paper pulp and paper products.Bleaching waste liquor does not have chlorion and assembles etching apparatus, chloride ion interference alkali recovery problem, and bleaching waste liquor can enter alkali and reclaim, and floats back slurry washings reusable edible, energy-conservation, water saving, and environmental benefit is given prominence to.
The specific embodiment
Example 1:
Boiling is raw material with the cornstalk, after cut-out, dedusting, preimpregnation, drops into boiling vessel, and medicine to over dry cornstalk percentage by weight is:
Ammonium sulfite 15～20%
Potassium sulfite 3～7%
Urea 1.5～3.5%
Sulphur 0.5～2%
Adopt the rotary spherical digester cooking schedule to be: liquor ratio 2.8,1 hour heating-up time, be warming up to 160 ℃, be incubated 2 hours.
Association with pulp bleaching adopts oxygen and alkali is strengthened simultaneously, the hydrogen peroxide bleaching technology of urea activation, and bleaching process is:
Medicine does not float the paper pulp percentage by weight to over dry:
Hydrogen peroxidase 10 .5～2%
Urea 0.4～1.5%
Magnesium sulfate 0.3%
Sodium metasilicate 1～3%
NaOH 2～6%
Pulp density 8%
Logical oxygen under oxygen pressure 0.5MPa
Handled 1 hour down at 80 ℃, promptly get total chlorine free bleaching paper pulp, paper and cardboard.
Example 2:
Boiling is a raw material to remove the marrow cornstalk, after cut-out, dedusting, preimpregnation, drops into boiling vessel, and medicine removes marrow cornstalk percentage by weight to over dry and is:
Ammonium sulfite 15～24%
Potassium sulfite 3～10%
Urea 1～4%
Sulphur 0.35～3%
Adopt the rotary spherical digester cooking schedule to be: liquor ratio 2.8,1 hour heating-up time, be warming up to 165 ℃, be incubated 2 hours,
Association with pulp bleaching adopts oxygen and alkali is strengthened simultaneously, the hydrogen peroxide bleaching technology of urea activation, and process conditions are:
Medicine does not float the paper pulp percentage by weight to over dry:
Hydrogen peroxidase 10 .8～3%
Urea 0.5～2%
Magnesium sulfate 0.3～1%
Sodium metasilicate 1～4%
NaOH 2.5～7%
Pulp density 8%
Logical oxygen under oxygen pressure 0.5MPa
Handled 1.5 hours down at 90 ℃, promptly get total chlorine free bleaching paper pulp, paper and cardboard.
Example 3:
To remove the marrow cornstalk is raw material, after cut-out, dedusting, preimpregnation, drops into boiling vessel, and medicine removes marrow cornstalk percentage by weight to over dry and is:
Sodium sulfite 12～20%
Potassium sulfite 2～5%
NaOH 1.5～5%
Sulphur 0.3～1%
Adopt the rotary spherical digester cooking schedule to be: liquor ratio 3,1 hour heating-up time, be warming up to 155 ℃, be incubated 2 hours.
Association with pulp bleaching adopts oxygen and alkali is strengthened simultaneously, the hydrogen peroxide bleaching technology of urea activation, and process conditions are:
Medicine does not float the paper pulp percentage by weight to over dry:
Hydrogen peroxidase 10 .8～2%
Urea 0.5～1%
Magnesium sulfate 0.3～1%
Sodium metasilicate 1～3%
NaOH 1.5～5%
Pulp density 8%
Logical oxygen under oxygen pressure 0.5MPa
Handled 1 hour down at 90 ℃, promptly get total chlorine free bleaching paper pulp, paper and cardboard.
Example 4:
Above-mentioned example 1, the paper pulp 90% of production, proportioning 10% Russian import needle bleached wood pulp has been produced two-sided offset paper;
Example 5:
Above-mentioned example 2, the paper pulp 100% of production has been produced two-sided offset paper, outlet writing folio;
Example 6:
Above-mentioned example 3, the paper pulp 100% of production has been produced two-sided offset paper, the outlet writing folio;
Example 7:
The paper pulp that above-mentioned example 2, example 3 are produced, proportioning 30% Russian import needle bleached wood pulp has been produced white tough bag paper, is used for packaged food, flour, dry fruit, food compound etc.
Claims (3)
1. method of utilizing cornstalk to make total chlorine free bleaching pulp production food wrapper and cultural paper, with cornstalk, remove the marrow cornstalk be raw material after cut-out, dedusting, preimpregnation, boiling, bleaching, its boiling is characterised in that:
With ammonium sulfite and potassium sulfite or sodium sulfite is main digestant, and sulphur or sulphur urine are auxiliary agent, and urea and NaOH are buffer, and the boiling chemicals is to the over dry cornstalk or remove marrow cornstalk raw material weight percentage:
(NH
4)
2SO
3 10～45％
K
2SO
3 1.5～25％
(NH
2)
2CO 0～6％
S or (NH
2)
2SO 0.2～5%
NaOH 0～20％
Na
2SO
3 0～20％
Cooking schedule: liquor ratio 2.3～3.4,30～90 minutes heating-up times, be warming up to 145～185 ℃, be incubated 30～180 minutes.
2. method of utilizing cornstalk to make total chlorine free bleaching pulp production food wrapper and cultural paper, with cornstalk, remove the marrow cornstalk be raw material after cut-out, dedusting, preimpregnation, boiling, bleaching, its bleaching is characterised in that:
The hydrogen peroxide bleaching (PEOT) of that two sections or multistage oxygen and alkali are strengthened simultaneously, urea or the activation of sulphur urine, the bleached chemical medicine to over dry unbleached pulp percentage is:
H
2O
2 0.8～5％
(NH
2)
2CO or (NH
2)
2SO 0.1～4%
Logical oxygen under oxygen pressure 0.1-0.7MPa
NaOH 1～10％
Na
2SiO
3 1～10％
MgSO
4 0.05～1.5％
Bleaching conditions: pulp density 6～20%, 55～95 ℃ of temperature, bleaching time 45～180 minutes.
Under this bleached chemical drug dosage and bleaching conditions, according to product requirement, two sections can identical or differently be carried out association with pulp bleaching.Bleaching process can repeat by multistage.
3. method of utilizing cornstalk to make total chlorine free bleaching pulp production food wrapper and cultural paper, with cornstalk, remove the marrow cornstalk be raw material after cut-out, dedusting, preimpregnation, boiling, bleaching, its product feature is:
According to product requirement, adopt 30%～100% cornstalk or remove the total chlorine free bleaching paper pulp that the marrow cornstalk is made, proportioning 0～70% element-free chlorine and total chlorine free bleaching wood pulp or 0～70% non-wood pulp, secondary stock, production and food, direct or indirect food wrapper and cardboard, cultural paper and the cardboard that contacts of human body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100506819A CN1295396C (en) | 2004-10-26 | 2004-10-26 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100506819A CN1295396C (en) | 2004-10-26 | 2004-10-26 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600989A true CN1600989A (en) | 2005-03-30 |
| CN1295396C CN1295396C (en) | 2007-01-17 |
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ID=34665927
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|---|---|---|---|
| CNB2004100506819A Expired - Fee Related CN1295396C (en) | 2004-10-26 | 2004-10-26 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406646C (en) * | 2007-07-27 | 2008-07-30 | 山东泉林纸业有限责任公司 | Prepared high hardness pulp using grass kind plant as raw material and preparation method thereof |
| CN101555672B (en) * | 2009-05-18 | 2010-11-03 | 永州湘江纸业有限责任公司 | Food wrapper and manufacturing method thereof |
| CN101880981A (en) * | 2010-07-09 | 2010-11-10 | 延边石岘白麓纸业股份有限公司 | Method for making pulp |
| CN101671974B (en) * | 2008-09-11 | 2011-01-19 | 山东太阳纸业股份有限公司 | Sunflower stalk pulping technology |
| CN102154906A (en) * | 2011-04-20 | 2011-08-17 | 山东泉林纸业有限责任公司 | Paper pulp prepared from maize straw, preparation method thereof and paper product prepared from paper pulp |
| CN102363929A (en) * | 2011-11-30 | 2012-02-29 | 中冶纸业银河有限公司 | Method for improving hydrogen peroxide bleaching efficiency of paper pulp |
| CN101078185B (en) * | 2006-05-24 | 2012-05-23 | 黄正华 | Application of sodium peroxide mixing solution containing sodium ozonide in preparing paper pulp |
| CN101757843B (en) * | 2008-10-17 | 2012-10-03 | 山东福荫造纸环保科技有限公司 | Improved process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| CN103726382A (en) * | 2013-12-31 | 2014-04-16 | 安徽泾县千年古宣宣纸有限公司 | Pure straw Chinese art paper and chloride-free bleaching production process thereof |
| CN105088854A (en) * | 2015-08-13 | 2015-11-25 | 合肥龙发包装有限公司 | Environmentally-friendly package paper |
| CN106245310A (en) * | 2016-08-16 | 2016-12-21 | 朱玲 | A kind of 6 amino 1 hexanol absorbent-type hydrogen peroxide bleaching stabilizers |
| CN106368030A (en) * | 2016-09-19 | 2017-02-01 | 昆明理工大学 | Method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099500C (en) * | 2000-11-21 | 2003-01-22 | 沈阳市天然纤维研究所 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
| CN1534134A (en) * | 2003-03-27 | 2004-10-06 | 沈阳神农绿色肥垃圾处理有限公司 | Chlorineless bleaching paper pulp producing process using pith removed corn stalk as raw material |
-
2004
- 2004-10-26 CN CNB2004100506819A patent/CN1295396C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078185B (en) * | 2006-05-24 | 2012-05-23 | 黄正华 | Application of sodium peroxide mixing solution containing sodium ozonide in preparing paper pulp |
| CN100406646C (en) * | 2007-07-27 | 2008-07-30 | 山东泉林纸业有限责任公司 | Prepared high hardness pulp using grass kind plant as raw material and preparation method thereof |
| CN101671974B (en) * | 2008-09-11 | 2011-01-19 | 山东太阳纸业股份有限公司 | Sunflower stalk pulping technology |
| CN101757843B (en) * | 2008-10-17 | 2012-10-03 | 山东福荫造纸环保科技有限公司 | Improved process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| CN101555672B (en) * | 2009-05-18 | 2010-11-03 | 永州湘江纸业有限责任公司 | Food wrapper and manufacturing method thereof |
| CN101880981A (en) * | 2010-07-09 | 2010-11-10 | 延边石岘白麓纸业股份有限公司 | Method for making pulp |
| CN101880981B (en) * | 2010-07-09 | 2013-11-27 | 延边石岘白麓纸业股份有限公司 | Method for making pulp |
| CN102154906A (en) * | 2011-04-20 | 2011-08-17 | 山东泉林纸业有限责任公司 | Paper pulp prepared from maize straw, preparation method thereof and paper product prepared from paper pulp |
| CN102363929A (en) * | 2011-11-30 | 2012-02-29 | 中冶纸业银河有限公司 | Method for improving hydrogen peroxide bleaching efficiency of paper pulp |
| CN103726382A (en) * | 2013-12-31 | 2014-04-16 | 安徽泾县千年古宣宣纸有限公司 | Pure straw Chinese art paper and chloride-free bleaching production process thereof |
| CN105088854A (en) * | 2015-08-13 | 2015-11-25 | 合肥龙发包装有限公司 | Environmentally-friendly package paper |
| CN106245310A (en) * | 2016-08-16 | 2016-12-21 | 朱玲 | A kind of 6 amino 1 hexanol absorbent-type hydrogen peroxide bleaching stabilizers |
| CN106368030A (en) * | 2016-09-19 | 2017-02-01 | 昆明理工大学 | Method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp |
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| CN1295396C (en) | 2007-01-17 |
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