CN100432334C - Process for making pulp with white paper mulberry - Google Patents
Process for making pulp with white paper mulberry Download PDFInfo
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- CN100432334C CN100432334C CNB2006101046506A CN200610104650A CN100432334C CN 100432334 C CN100432334 C CN 100432334C CN B2006101046506 A CNB2006101046506 A CN B2006101046506A CN 200610104650 A CN200610104650 A CN 200610104650A CN 100432334 C CN100432334 C CN 100432334C
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Abstract
The invention relates to a method for producing paper stuff with white paper. First, white paper after removing black paper is cut into small segment for standby application and screening white paper is set in water with NAaC204 so as to extract pectin in white paper. After extracting white paper without pectin is decomposed to fibre in mechanical method and fibre is dissociated from liquor. Detached fibre is prepared for paper stuff which is treated in prior with H2SO4. Paper stuff with Mg2SO4, Na2Sio3, NaOH and H202 after pretreatment is whitened, then Paper stuff with Mg2SO4, Na2Sio3, NaOH and H202 after bleaching is whitened again. Through extracting pectin from white paper, handling white paper without pectin in mechanical method, making it slurry, whitening paper stuff by H202 two times, there are not only gaining white paper stuff in high production ratio but also additive high pectin.
Description
Technical field
The present invention relates to a kind of preparation method of paper pulp, particularly a kind of method of making pulp with white paper mulberry.
Background technology
The tapa fiber is long, pure white, it is the raw material of papermaking fiber of high-quality, be one of China's raw material of being applied to papermaking the earliest, be usually used in making long fiber fine papers such as beer filtration cardboard, coffee filtering paper, tea bag paper, china picture-character paper, decoration paper, lead-in wire tissue paper, battery diaphragm tissue paper, kraft capacitor paper, mica base paper and high newsprint, bank-note paper, paraffin paper, heat-sensitive paper, mobile phone paperboard at present.Owing to the demand of international market to long fiber pulp day by day increases, promoted the development of long fiber pulp industry in recent years.For a long time, soda processes and sulfate pulping are adopted in tapa slurrying mostly, in order fully to remove outer casting skin, adopt the digesting technoloy of high temperature, high-alkali, long-time insulation, and this makes that the damage of fiber is comparatively serious, cause paper pulp yield low, and pulping is soft.This traditional technology is that environmental pollution is serious, energy consumption is high to a kind of waste of limited tapa resource, the production cost height is its major defect.In order to overcome the deficiency of traditional pulping process, just be necessary to improve or develop new pulping process, make it possible to reduce production costs, improve into pulp yield, reduce and pollute.
The white structure leather and fur hydrochlorate method slurrying of developmental research afterwards, on digesting technoloy and result, compare and obtained significant progress with alkaline process, but, the a large amount of pectin of dissolving in the white structure leather and fur hydrochlorate method cooking waste liquor, this has just brought very big difficulty to liquid waste processing, and technology cost own is higher, makes the popularization of this boiling method be subjected to very big restriction.These two kinds white structure leather paste-making methods have not only been wasted pectin, cause environmental pollution simultaneously again.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of preparation technology simple, alleviate the method for the making pulp with white paper mulberry of environmental pollution.
For achieving the above object, the technical solution used in the present invention is: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length, stand-by; Get 1 part of white structure skin after the section screening and place 14～18 times water, and then add the Na of white structure cortex amount 8%～11%
2C
2O
4, the pectin in 80 ℃～90 ℃ white structure skins of extraction, the extraction time is 110min～130min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; With being mixed with mass concentration behind the pretreated pulp washing is 10% first paper pulp, adds the Mg of fiber quality 0.3%～0.4% then therein
2SO
4, 3.0%～4.0% Na
2SiO
3, 1.5～2.5% NaOH and 1.5%～2.0% H
2O
2At 100 ℃～120 ℃, pressure is to bleach 90min～120min under 0.4MPa～0.6MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4%
2SO
4, 2.0%～4.0% Na
2SiO
3, 1.0～2.0% NaOH and 1.0%～2.0% H
2O
2, bleach 100min～130min down at 70 ℃～90 ℃.
Pectin in the present invention elder generation dialogue structure skin extracts (because the leaching process of pectin is equivalent to the Chemical Pretreatment process in the slurrying, so white structure skin must become loose behind the extraction pectin), again the white structure skin behind the extraction pectin is carried out mechanical treatment, make its pulping, following bleaching to paper pulp adopts oligosaprobic pressure hydrogen peroxide bleaching to add two sections bleachings of conventional hydrogen peroxide bleaching again, not only can obtain the white structure latex of high yield, and can obtain the pectin of high added value, be the higher pulping process of a kind of white structure skin comprehensive utilization of resources efficient, can be used for the slurrying of the higher bast fiber of other pectin contents.
The specific embodiment
Embodiment 1, and it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 14 times water, and then adds the Na of white structure cortex amount 9%
2C
2O
4, the pectin in 80 ℃ of white structure skins of extraction, the extraction time is 110min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.3% then therein
2SO
4, 3.0% Na
2SiO
3, 2.5% NaOH, 1.5% H
2O
2, at 100 ℃, pressure is to bleach 90min under the 0.4MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 2.0% Na
2SiO
3, 1.0% NaOH, 1.0% H
2O
2, bleach 100min down at 70 ℃ and get final product.
Embodiment 2, and it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 16 times water, and then adds the Na of white structure cortex amount 11%
2C
2O
4, the pectin in 85 ℃ of white structure skins of extraction, the extraction time is 130min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 4.0% Na
2SiO
3, 1.8% NaOH, 1.7% H
2O
2, at 110 ℃, pressure is to bleach 110min under the 0.5MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 3% Na
2SiO
3, 1.6% NaOH, 1.6% H
2O
2, bleach 110min down at 90 ℃ and get final product.
Embodiment 3, and it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 15 times water, and then adds the Na of white structure cortex amount 8%
2C
2O
4, the pectin in 83 ℃ of white structure skins of extraction, the extraction time is 120min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 3.5% Na
2SiO
3, 1.5% NaOH, 1.9% H
2O
2, at 105 ℃, pressure is to bleach 100min under the 0.6MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 4% Na
2SiO
3, 1.3% NaOH, 1.3% H
2O
2, bleach 120min down at 80 ℃ and get final product.
Embodiment 4, and it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 17 times water, and then adds the Na of white structure cortex amount 10%
2C
2O
4, the pectin in 87 ℃ of white structure skins of extraction, the extraction time is 115min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.3% then therein
2SO
4, 3.2% Na
2SiO
3, 2.0% NaOH, 1.8% H
2O
2, at 115 ℃, pressure is to bleach 120min under the 0.6MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 2.5% Na
2SiO
3, 1.8% NaOH, 1.8% H
2O
2, bleach 130min down at 75 ℃ and get final product.
Embodiment 5, and it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 18 times water, and then adds the Na of white structure cortex amount 8%
2C
2O
4, the pectin in 90 ℃ of white structure skins of extraction, the extraction time is 125min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 3.8% Na
2SiO
3, 2.3% NaOH, 2.0% H
2O
2, at 120 ℃, pressure is to bleach 115min under the 0.4MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 3.5% Na
2SiO
3, 2.0% NaOH, 2.0% H
2O
2, bleach 116min down at 85 ℃ and get final product.
Various physical properties according to the paper pulp of preparation method's gained of the present invention are as shown in table 1 below.
The present invention unites two into one pectin leaching process and white structure hide fiber preprocessing process, with abatement of pollution in process of production, so no traditional pulping waste liquor produces.The following bleaching process adopts the low bleaching process that pollutes, and with respect to other structure leather paste-making methods, pollution is reduced to reduced levels, is a kind of new pulping process that cleans production that meets; The pulp brightness that obtains is higher, and retention of whiteness is good, and the bleached pulp physical strength is higher, has kept the characteristics of long fibered pulp.Main is because the processing mode gentleness, and yield of bleached pulp reaches 78.76%, will exceed very highly than general slurrying, is a kind of pulping process of high yield; Brown stock yield 87.29%, pectin yield 8% (raw material relatively), both amount to 95.25%, make white structure skin resource obtain comprehensive utilization cmpletely.
Claims (6)
1, a kind of method of making pulp with white paper mulberry is characterized in that:
1) to be cut into length be that 20mm～30mm, width are the segment of 5mm～10mm to the white structure skin that at first will remove casting skin, stand-by;
2) get 1 part of white structure skin after the section screening and place 14～18 times water, and then add the Na of white structure cortex amount 8%～11%
2C
2O
4, the pectin in 80 ℃～90 ℃ white structure skins of extraction, the extraction time is 110min～130min;
3) after extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution;
4) to be mixed with mass concentration be 5% paper pulp to the fiber after will separating, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min;
5) be 10% first paper pulp with being mixed with mass concentration behind the pretreated pulp washing, add the Mg of fiber quality 0.3%～0.4% then therein
2SO
4, 3.0%～4.0% Na
2SiO
3, 1.5～2.5% NaOH and 1.5%～2.0% H
2O
2, at 100 ℃～120 ℃, pressure is to bleach 90min～120min under 0.4MPa～0.6MPa condition;
6) be mixed with mass concentration after first paper pulp after will bleaching washs and be 10% second paper pulp, add the Mg of fiber quality 0.4%
2SO
4, 2.0%～4.0% Na
2SiO
3, 1.0～2.0% NaOH and 1.0%～2.0% H
2O
2, bleach 100min～130min down at 70 ℃～90 ℃.
2, the method for making pulp with white paper mulberry according to claim 1 is characterized in that: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 14 times water, and then adds the Na of white structure cortex amount 9%
2C
2O
4, the pectin in 80 ℃ of white structure skins of extraction, the extraction time is 110min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.3% then therein
2SO
4, 3.0% Na
2SiO
3, 2.5% NaOH and 1.5% H
2O
2, at 100 ℃, pressure is to bleach 90min under the 0.4MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 2.0% Na
2SiO
3, 1.0% NaOH and 1.0% H
2O
2, bleach 100min down at 70 ℃.
3, the method for making pulp with white paper mulberry according to claim 1 is characterized in that: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 16 times water, and then adds the Na of white structure cortex amount 11%
2C
2O
4, the pectin in 85 ℃ of white structure skins of extraction, the extraction time is 130min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 4.0% Na
2SiO
3, 1.8% NaOH and 1.7% H
2O
2, at 110 ℃, pressure is to bleach 110min under the 0.5MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 3% Na
2SiO
3, 1.6% NaOH and 1.6% H
2O
2, bleach 110min down at 90 ℃.
4, the method for making pulp with white paper mulberry according to claim 1 is characterized in that: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 15 times water, and then adds the Na of white structure cortex amount 8%
2C
2O
4, the pectin in 83 ℃ of white structure skins of extraction, the extraction time is 120min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 3.5% Na
2SiO
3, 1.5% NaOH and 1.9% H
2O
2, at 105 ℃, pressure is to bleach 100min under the 0.6MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 4% Na
2SiO
3, 1.3% NaOH and 1.3% H
2O
2, bleach 120min down at 80 ℃.
5, the method for making pulp with white paper mulberry according to claim 1 is characterized in that: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 17 times water, and then adds the Na of white structure cortex amount 10%
2C
2O
4, the pectin in 87 ℃ of white structure skins of extraction, the extraction time is 115min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.3% then therein
2SO
4, 3.2% Na
2SiO
3, 2.0% NaOH and 1.8% H
2O
2, at 115 ℃, pressure is to bleach 120min under the 0.6MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 2.5% Na
2SiO
3, 1.8% NaOH and 1.8% H
2O
2, bleach 130min down at 75 ℃.
6, the method for making pulp with white paper mulberry according to claim 1 is characterized in that: it is that 20mm～30mm, width are the segment of 5mm～10mm that the white structure skin that at first will remove casting skin is cut into length; The white structure skin of getting after 1 part of cutting places 18 times water, and then adds the Na of white structure cortex amount 8%
2C
2O
4, the pectin in 90 ℃ of white structure skins of extraction, the extraction time is 125min; After extraction is finished, adopt machinery to discongest the white structure skin behind the extraction pectin is carried out fiber dispersion, then fiber is separated with solution; It is 5% paper pulp that fiber after separating is mixed with mass concentration, and the mass concentration that adds fiber quality 2% then is 98% H
2SO
4, 60 ℃ of preliminary treatment of paper pulp being carried out 30min; It is 10% first paper pulp that pretreated paper pulp is mixed with mass concentration, adds the Mg of fiber quality 0.4% then therein
2SO
4, 3.8% Na
2SiO
3, 2.3% NaOH and 2.0% H
2O
2, at 120 ℃, pressure is to bleach 115min under the 0.4MPa condition; It is 10% second paper pulp that first paper pulp after the bleaching is mixed with mass concentration after washing, and adds the Mg of fiber quality 0.4% in second paper pulp
2SO
4, 3.5% Na
2SiO
3, 2.0% NaOH and 2.0% H
2O
2, bleach 116min down at 85 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101046506A CN100432334C (en) | 2006-09-26 | 2006-09-26 | Process for making pulp with white paper mulberry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101046506A CN100432334C (en) | 2006-09-26 | 2006-09-26 | Process for making pulp with white paper mulberry |
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| CN1928220A CN1928220A (en) | 2007-03-14 |
| CN100432334C true CN100432334C (en) | 2008-11-12 |
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| CNB2006101046506A Expired - Fee Related CN100432334C (en) | 2006-09-26 | 2006-09-26 | Process for making pulp with white paper mulberry |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102154935B (en) * | 2010-12-31 | 2012-02-01 | 中冶纸业银河有限公司 | Light paper made by blending complete high-yield pulp and papermaking technology thereof |
| CN112593438A (en) * | 2020-11-17 | 2021-04-02 | 浙江弘伦纸业有限公司 | Sulfur-free environment-friendly lead yarn paper and manufacturing process thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385580A (en) * | 2001-05-11 | 2002-12-18 | 张志芬 | Pulping using bark of artificial quickly-grown Common Papermulberry (HAP method) and trunk (APMP method) |
| CN1657695A (en) * | 2005-02-22 | 2005-08-24 | 杨怀基 | Production method of stencil tissue paper |
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2006
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385580A (en) * | 2001-05-11 | 2002-12-18 | 张志芬 | Pulping using bark of artificial quickly-grown Common Papermulberry (HAP method) and trunk (APMP method) |
| CN1657695A (en) * | 2005-02-22 | 2005-08-24 | 杨怀基 | Production method of stencil tissue paper |
Non-Patent Citations (6)
| Title |
|---|
| 从构皮的理化性能谈构皮的制浆. 李新平等.国际造纸，第22卷第1期. 2003 |
| 从构皮的理化性能谈构皮的制浆. 李新平等.国际造纸，第22卷第1期. 2003 * |
| 构树制浆与综合利用研究的思考和实践. 聂勋载.湖北工学院学报，第17卷第1期. 2002 |
| 构树制浆与综合利用研究的思考和实践. 聂勋载.湖北工学院学报，第17卷第1期. 2002 * |
| 构皮过氧化氢草酸盐法制浆初探. 李新平等.纸和造纸，第2期. 2003 |
| 构皮过氧化氢草酸盐法制浆初探. 李新平等.纸和造纸，第2期. 2003 * |
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