CN104313933A - Green bleaching method of sulfate bagasse slurry - Google Patents
Green bleaching method of sulfate bagasse slurry Download PDFInfo
- Publication number
- CN104313933A CN104313933A CN201410490333.7A CN201410490333A CN104313933A CN 104313933 A CN104313933 A CN 104313933A CN 201410490333 A CN201410490333 A CN 201410490333A CN 104313933 A CN104313933 A CN 104313933A
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- Prior art keywords
- bleaching
- sulfate
- bagasse pulp
- oven dry
- ozone
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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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention belongs to the technical field of pulping papermaking, and relates to an efficient green sulfate bagasse slurry bleaching method. The bleaching method comprises: (1) pretreatment with an acid or a chelating agent; (2) bleaching with ozone; and (3) bleaching with hydrogen peroxide. According to the present invention, the bleaching method completely adopts the oxygen-containing bleaching agent to replace the traditional chlorine-containing bleaching agent, such that the generation and the emission of the adsorbable organic chloride are completely eliminated, the clean production of the green bleaching of the sulfate bagasse slurry is achieved, and characteristics of environmental protection and health on human are provided; the use amount of the clear water is saved by more than 50-80% compared with the existing bleaching method; compared with the construction investment of the same scale bleaching adopting chlorine dioxide, the construction investment of the bleaching method of the present invention can be saved by 30-50%; compared with the production cost of per ton of the slurry of the bleaching adopting chlorine dioxide, the production cost of per ton of the slurry of the bleaching method of the present invention can be saved by 300-500 yuan; and the obtained bleached sulfate bagasse slurry has the good quality, wherein the whiteness achieves more than 83% ISO, the viscosity achieves more than 550-600 ml/g, and the obtained bleached sulfate bagasse slurry is especially for papermaking the high-end and sanitary household paper.
Description
Technical field
The invention belongs to papermaking technical field, be specifically related to a kind of sulfate bagasse pulp method for bleaching of efficient green.
Background technology
Existing sulfate bagasse pulp method for bleaching, all based on chlorine bleach flow process, comprises two large class flow processs specifically; Bleaching process containing elemental chlorine (i.e. chlorine) and the bleaching process containing combined chlorine.The technique content of this two classes flow process is as follows:
1, containing the bleaching process of elemental chlorine (i.e. chlorine), typical technological process includes: chlorination (C)-alkali treatment (E)-hypochlorite (H) bleaching (is called for short CEH bleaching, lower same), or chlorination (C)-alkali treatment (E)-hypochlorite (H)-hypochlorite (H) bleaching (being called for short CEHH bleaching, lower same).Mainly there is following problem in CEH, CEHH bleaching process:
(1) chlorination and alkali treatment process produce a large amount of carcinogenic toxicity organic chlorides (AOX), AOX does not exist only in the waste water of bleaching, but also be present in sulfate bagasse pulp and paper product, high risks is caused to the health of environment and the mankind;
(2) CEH, CEHH bleached sulphate bagasse pulp concentration is low, and cannot realize the circulating and recovering of waste water, and bleaching aqueous amount is very large, and wastewater discharge is also large, and its bleaching effluent discharge capacity reaches 100-150m
3/ t starches;
(3) COD of CEH, CEHH bleaching effluent
crheight, AOX is high, cannot reach the requirement of " pulp and paper industry pollution discharge standard " (GB3544-2008);
(4) after bleaching, sulfate bagasse pulp whiteness low (below 75%ISO), one-tenth paper embrittlement, brightness reversion seriously, cannot meet the pulping requirements of high-grade industrial paper for daily use;
(5) will improve the apparent whiteness of paper, must add the fluorescent whitening agent having carcinogenesis when manufacturing paper with pulp, and fluorescent whitening agent is in packaging for foodstuff, paper for daily use field belongs to the chemicals prohibitted the use.
2, containing the bleaching process of combined chlorine, typical technological process has: oxygen delignification (O)-first paragraph ClO 2 bleaching (D
1)-alkali treatment (E)-second segment ClO 2 bleaching (D
2) (be called for short OD
1eD
2bleaching, lower same), OD
1eD
2mainly there is following problem in bleaching:
(1) chlorine dioxide preparation system is complicated, and operational danger is high, and the aerial explosible limit concentration of chlorine dioxide is low;
(2) chlorine dioxide is extremely strong to bleaching equipment corrosivity, and ClO 2 bleaching equipment requirement has very strong corrosion resistance, and bleaching system equipment investment is huge;
(3) cost of manufacture of chlorine dioxide is high, and sulfate bagasse pulp bleaching production cost is large;
(4) the ton slurry water consumption of bleaching system is comparatively large, and bleaching middle-stage wastewater displacement is comparatively large, is generally 25-30m3/t slurry;
(5) middle-stage wastewater pollutional load is higher, and its waste water COD cr is 1100-1300mg/L;
(6) generate toxicity organic chloride (AOX) in bleaching production process, and enter bleaching middle-stage wastewater, serious harm is caused to environment and human health;
(7) use chlorine bleaches in bleaching process, remain in paper, direct harm is caused to health, especially for production sanitary paper series of products.
Summary of the invention
For the defect that existing sulfate bagasse pulp bleaching technology exists, the object of the present invention is to provide a kind of sulfate bagasse pulp method for bleaching of high-efficiency cleaning.Sulfate bagasse pulp method for bleaching of the present invention adopts environment amenable ozone and hydrogen peroxide as bleaching agent, forms the flow process completely without chlor bleaching, thus the green bleach clean-up realizing sulfate bagasse pulp is produced; Sulfate bagasse pulp method for bleaching of the present invention has that bleaching efficiency is high, production cost is low, rinse dosage is few, wastewater discharge is low, pollutional load is extremely light, in waste water containing to the mankind and the serious organic chloride (AOX) of environmental hazard and can handling strong feature, be applicable to newly-built sulfate bagasse pulp bleaching project, be also applicable to sulfate bagasse pulp bleaching Technical revamp engineering projects.
The flow process of the green method for bleaching of sulfate bagasse pulp of the present invention is: hydrogen peroxide bleaching (P section), comprises the steps: for acid or chelating agent preliminary treatment (AQ section)---ozone bleaching (Z section)---
(1) acid or chelating agent preliminary treatment:
Sulfate bagasse pulp after boiling is washed, adds H
2sO
4or chelating agent, then add viscosity protective agent, carry out preliminary treatment;
Preferably, described sulfate bagasse pulp wash after concentration be 6 ~ 10% (wt);
Preferably, described H
2sO
4addition be 10 ~ 20Kg/ (t oven dry stock);
Preferably, the addition of described chelating agent is 0.5 ~ 2.0Kg/ (t oven dry stock);
Preferably, described chelating agent is ethylenediamine tetra-acetic acid (EDTA) or diethyl pentetic acid (DTPA);
Preferably, the protectant addition of described viscosity is 3 ~ 15kg/ (t oven dry stock);
Preferably, described viscosity protective agent is more than one in sweet mellow wine, gluconic acid sodium salt or odium stearate;
Preferably, described pretreated reaction condition is: temperature is 50 ~ 90 DEG C, and the reaction time is 30 ~ 60min;
(2) ozone bleaching:
To concentrate through the pretreated sulfate bagasse pulp of step (1), and enter in ozone reactor, pass into ozone, under normal temperature state, carry out ozone bleaching;
Preferably, described concentration after the pretreated sulfate bagasse pulp of step (1) concentrates is 32 ~ 42% (wt);
Preferably, the addition of described ozone is 5 ~ 8Kg/ (t oven dry stock);
Preferably, the reaction time of described ozone bleaching is 1 ~ 3min;
(3) hydrogen peroxide bleaching:
Sulfate bagasse pulp after step (2) ozone bleaching is carried out washing concentrating, adds H
2o
2, NaOH, sodium metasilicate and viscosity protective agent, pass into steam and heat up, then enter hydrogen peroxide bleaching upspout, then enter hydrogen peroxide and fall stream bleaching tower and stop reaction, reaction terminates to obtain the sulfate bagasse pulp after bleaching;
Preferably, the concentration after the sulfate bagasse pulp after described step (2) ozone bleaching carries out washing concentrating is 12 ~ 15% (wt);
Preferably, described H
2o
2addition be 15 ~ 30Kg/ (t oven dry stock);
Preferably, the addition of described NaOH is 5 ~ 15Kg/ (t oven dry stock);
Preferably, the addition of described sodium metasilicate is 5 ~ 20Kg/ (t oven dry stock);
Preferably, the protectant addition of described viscosity is 3 ~ 5kg/ (t oven dry stock);
Preferably, described viscosity protective agent is more than one in sweet mellow wine, gluconic acid sodium salt or odium stearate;
Preferably, the sulfate bagasse pulp temperature after steam heats up is 85 ~ 100 DEG C;
Preferably, the time of staying that sulfate bagasse pulp falls stream bleaching tower at hydrogen peroxide is 90 ~ 120min.
The present invention has following advantage and effect relative to prior art:
(1) method for bleaching of the present invention is without oxygen delignification process, and bleaching effect is promoted greatly, and viscosity loss reduces greatly.
(2) method for bleaching of the present invention all adopts and substitutes traditional chlorine-containing bleaching (chlorine containing oxygen bleaching agent (ozone, hydrogen peroxide), hypochlorite, chlorine dioxide), generation and the discharge of adsorbable organic chloride (AOX) is completely eliminated from beginning of production, realize the green bleach clean-up of sulfate bagasse pulp to produce, environmentally friendly, favourable to human health.
(3) method for bleaching of the present invention all adopts containing oxygen bleaching agent, and the end product that its chemical reaction decomposes is water, therefore, remains after drift in sulfate bagasse pulp without the chlorinated substance of any harmful human health, advantageous particularly to productive life sanitary paper.
(4) the whole circulated in countercurrent reuse of waste water of the AQ section in method for bleaching of the present invention, Z section, P section, the washing 10-15m only after P section
3the clear water of/t slurry, the more existing method for bleaching of its rinse dosage saves more than 50 ~ 80%.
(5) the middle-stage wastewater discharge capacity of method for bleaching of the present invention is little, is only 10 ~ 15m
3/ t starches, and more existing method for bleaching reduces more than 50 ~ 80%, the pollutional load COD of middle-stage wastewater
crreduce more than 50 ~ 80%.
(6) construction investment of method for bleaching of the present invention is few, compared with the ClO 2 bleaching of same size, can reduce investment outlay 30 ~ 50%.
(7) method for bleaching production run cost of the present invention is low, and compared with ClO 2 bleaching, ton slurry production cost can save 300 ~ 500 yuan.
(8) the bleached sulphate bagasse pulp whiteness that obtains of method for bleaching of the present invention is high, quality good, and whiteness can reach more than 83%ISO, and be specially adapted to manufacture paper with pulp paper for daily use that is high-grade, health.
(9) method for bleaching operability of the present invention, controllability are good.
Accompanying drawing explanation
Fig. 1 is the process chart of the green method for bleaching of sulfate bagasse pulp of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
As shown in the process chart of Fig. 1, the process step that the green method for bleaching of sulfate bagasse pulp of the present invention is detailed is as follows:
(1) acid or chelating agent preliminary treatment
Sulfate bagasse pulp after boiling is pumped to 1
#vacuum pulp washing machine, by 1
#vacuum pulp washing machine and 2
#vacuum pulp washing machine carries out series connection washing, and sulfate bagasse pulp wash degree controls residual alkali 0.2 ~ 0.3g/t (by NaOH) below.After cleaning, sulfate bagasse pulp enters pretreater through double roller mixer, in double roller mixer, add 1 ~ 2%H
2sO
4the chelating agent of (to oven dry stock quality meter) or 0.05 ~ 0.2% (to oven dry stock quality meter); and the viscosity protective agent of 3 ~ 5kg/ (t oven dry stock); chelating agent can select EDTA or DTPA; logical vapour enters pretreater after being warming up to 50 ~ 90 DEG C, is 30 ~ 60min at dwell time in the tower.
(2) high dense ozone bleaching
After preliminary treatment, sulfate bagasse pulp is pumped to single-screw water extractor and concentrates, high dense ozone reactor is entered after being concentrated into the sulfate bagasse pulp mass percent concentration of 32 ~ 42%, the ozone of 5 ~ 8Kg/ (t oven dry stock) is passed into toward high dense ozone reactor, carry out ozone bleaching reaction at normal temperatures and pressures, after 1 ~ 3min, complete reaction.
(3) hydrogen peroxide bleaching
After ozone bleaching, sulfate bagasse pulp is delivered to 3
#suction washer carries out the concentration of washing, being concentrated into 12 ~ 15% weight, after then adding 0.5 ~ 1.5%NaOH (to oven dry stock quality meter), 0.5 ~ 2.0% sodium metasilicate (to oven dry stock quality meter) and appropriate viscosity protective agent, enters 1
#middle underflow pump, logical vapour enters 1 after being warming up to 85 ~ 100 DEG C
#medium-consistency pulp mixer, 1
#1.5 ~ 3.0%H is added in medium-consistency pulp mixer
2o
2(to oven dry stock quality meter), enters hydrogen peroxide bleaching upspout, then enters hydrogen peroxide and fall stream bleaching tower, and stop 90 ~ 120min in tower after, reaction terminates.
Bleached sulphate bagasse pulp is pumped to 4
#suction washer enters washing, and after being delivered to drift subsequently, pulp storage tower storage is for subsequent use.
Embodiment 2
The green method for bleaching of a kind of sulfate bagasse pulp, comprises the steps:
(1) acid or chelating agent preliminary treatment
After boiling, sulfate bagasse pulp is pumped to 1
#vacuum pulp washing machine, by 1
#vacuum pulp washing machine and 2
#vacuum pulp washing machine carries out series connection washing, and sulfate bagasse pulp wash degree controls residual alkali 0.3g/t (by NaOH) below.After cleaning, sulfate bagasse pulp enters pretreater through double roller mixer, in double roller mixer, add 2%H
2sO
4the chelating agent of (to oven dry stock quality meter) or 0.2% (to oven dry stock quality meter); and the viscosity protective agent of 5kg/ (t oven dry stock); chelating agent selects EDTA, and logical vapour enters pretreater after being warming up to 50 DEG C, is 30min at dwell time in the tower.
(2) high dense ozone bleaching
After preliminary treatment, sulfate bagasse pulp is pumped to single-screw water extractor and concentrates, high dense ozone reactor is entered after being concentrated into the sulfate bagasse pulp mass percent concentration of 32%, the ozone of 5Kg/ (t oven dry stock) is passed into toward high dense ozone reactor, carry out ozone bleaching reaction at normal temperatures and pressures, after 2min, complete reaction.
(3) hydrogen peroxide bleaching
After ozone bleaching, sulfate bagasse pulp is delivered to 3
#suction washer carries out the concentration of washing, being concentrated into 15% weight, after then adding 0.8%NaOH (to oven dry stock quality meter), 2.0% sodium metasilicate (to oven dry stock quality meter) and appropriate viscosity protective agent, enters 1
#middle underflow pump, logical vapour enters 1 after being warming up to 100 DEG C
#medium-consistency pulp mixer, 1
#3.0%H is added in medium-consistency pulp mixer
2o
2(to oven dry stock quality meter), enters hydrogen peroxide bleaching upspout, then enters hydrogen peroxide and fall stream bleaching tower, and stop 120min in tower after, reaction terminates.
Bleached sulphate bagasse pulp is pumped to 4
#suction washer enters washing, and after being delivered to drift subsequently, pulp storage tower storage is for subsequent use.
Embodiment 3
The green method for bleaching of a kind of sulfate bagasse pulp, comprises the steps:
(1) acid or chelating agent preliminary treatment
After oxygen delignification, sulfate bagasse pulp is pumped to 1
#vacuum pulp washing machine, by 1
#vacuum pulp washing machine and 2
#vacuum pulp washing machine carries out series connection washing, and sulfate bagasse pulp wash degree controls residual alkali 0.2g/t (by NaOH) below.After cleaning, sulfate bagasse pulp enters pretreater through double roller mixer, in double roller mixer, add 1%H
2sO
4the chelating agent of (to oven dry stock quality meter) or 0.05% (to oven dry stock quality meter); and the viscosity protective agent of 3kg/ (t oven dry stock); chelating agent selects DTPA, and logical vapour enters pretreater after being warming up to 90 DEG C, is 60min at dwell time in the tower.
(2) high dense ozone bleaching
After preliminary treatment, sulfate bagasse pulp is pumped to single-screw water extractor and concentrates, high dense ozone reactor is entered after being concentrated into the sulfate bagasse pulp mass percent concentration of 37%, the ozone of 8Kg/ (t oven dry stock) is passed into toward high dense ozone reactor, carry out ozone bleaching reaction at normal temperatures and pressures, after 3min, complete reaction.
(3) hydrogen peroxide bleaching
After ozone bleaching, sulfate bagasse pulp is delivered to 3
#suction washer carries out the concentration of washing, being concentrated into 12% weight, after then adding 1.5%NaOH (to oven dry stock quality meter), 0.5% sodium metasilicate (to oven dry stock quality meter) and appropriate viscosity protective agent, enters 1
#middle underflow pump, logical vapour enters 1 after being warming up to 85 DEG C
#medium-consistency pulp mixer, 1
#1.5%H is added in medium-consistency pulp mixer
2o
2(to oven dry stock quality meter), enters hydrogen peroxide bleaching upspout, then enters hydrogen peroxide and fall stream bleaching tower, and stop 90min in tower after, reaction terminates.
Bleached sulphate bagasse pulp is pumped to 4
#suction washer enters washing, and after being delivered to drift subsequently, pulp storage tower storage is for subsequent use.
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 (4)
1. the green method for bleaching of sulfate bagasse pulp, is characterized in that comprising the steps:
(1) acid or chelating agent preliminary treatment:
Sulfate bagasse pulp after boiling is washed, adds H
2sO
4or chelating agent, then add viscosity protective agent, carry out preliminary treatment;
(2) ozone bleaching:
To concentrate through the pretreated sulfate bagasse pulp of step (1), and enter in ozone reactor, pass into ozone, under normal temperature state, carry out ozone bleaching;
(3) hydrogen peroxide bleaching:
Sulfate bagasse pulp after step (2) ozone bleaching is carried out washing concentrating, adds H
2o
2, NaOH, sodium metasilicate and viscosity protective agent, pass into steam and heat up, then enter hydrogen peroxide bleaching upspout, then enter hydrogen peroxide and fall stream bleaching tower and stop reaction, reaction terminates to obtain the sulfate bagasse pulp after bleaching.
2. the green method for bleaching of sulfate bagasse pulp according to claim 1, is characterized in that: in step (1):
Concentration after described sulfate bagasse pulp washs is 6 ~ 10% (wt);
Described H
2sO
4addition be 10 ~ 20Kg/ (t oven dry stock);
The addition of described chelating agent is 0.5 ~ 2.0Kg/ (t oven dry stock);
Described chelating agent is ethylenediamine tetra-acetic acid or diethyl pentetic acid;
The protectant addition of described viscosity is 3 ~ 15kg/ (t oven dry stock);
Described viscosity protective agent is more than one in sweet mellow wine, gluconic acid sodium salt or odium stearate;
Described pretreated reaction condition is: temperature is 50 ~ 90 DEG C, and the reaction time is 30 ~ 60min.
3. the green method for bleaching of sulfate bagasse pulp according to claim 1, is characterized in that: in step (2):
Described concentration after the pretreated sulfate bagasse pulp of step (1) concentrates is 32 ~ 42% (wt);
The addition of described ozone is 5 ~ 8Kg/ (t oven dry stock);
The reaction time of described ozone bleaching is 1 ~ 3min.
4. the green method for bleaching of sulfate bagasse pulp according to claim 1, is characterized in that: in step (3):
Concentration after sulfate bagasse pulp after described step (2) ozone bleaching carries out washing concentrating is 12 ~ 15% (wt);
Described H
2o
2addition be 15 ~ 30Kg/ (t oven dry stock);
The addition of described NaOH is 5 ~ 15Kg/ (t oven dry stock);
The addition of described sodium metasilicate is 5 ~ 20Kg/ (t oven dry stock);
The protectant addition of described viscosity is 3 ~ 5kg/ (t oven dry stock);
Described viscosity protective agent is more than one in sweet mellow wine, gluconic acid sodium salt or odium stearate;
Sulfate bagasse pulp temperature after steam heats up is 85 ~ 100 DEG C;
The time of staying that sulfate bagasse pulp falls stream bleaching tower at hydrogen peroxide is 90 ~ 120min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490333.7A CN104313933A (en) | 2014-09-23 | 2014-09-23 | Green bleaching method of sulfate bagasse slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490333.7A CN104313933A (en) | 2014-09-23 | 2014-09-23 | Green bleaching method of sulfate bagasse slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104313933A true CN104313933A (en) | 2015-01-28 |
Family
ID=52369234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410490333.7A Pending CN104313933A (en) | 2014-09-23 | 2014-09-23 | Green bleaching method of sulfate bagasse slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104313933A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894906A (en) * | 2015-05-29 | 2015-09-09 | 华南理工大学 | High-efficiency clean bleaching method of wheat straw pulp |
| CN105603795A (en) * | 2016-01-18 | 2016-05-25 | 华南理工大学 | Micro-fabrillated cellulose producing method |
| CN109750548A (en) * | 2019-01-07 | 2019-05-14 | 华南理工大学 | A kind of paper pulp green method for bleaching and paper pulp obtained |
| CN115584653A (en) * | 2022-12-12 | 2023-01-10 | 河南禾力能源有限公司 | Method for extracting alpha-cellulose by furfural residues |
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| US5785812A (en) * | 1992-11-27 | 1998-07-28 | Eka Nobel Ab | Process for treating oxygen delignified pulp using an organic peracid or salt, complexing agent and peroxide bleach sequence |
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| US6123809A (en) * | 1996-09-11 | 2000-09-26 | Solvay Interox (Societe Anony.) | Method for bleaching paper pulp |
| CN1371439A (en) * | 1999-08-30 | 2002-09-25 | 北卡罗来纳州立大学 | Pulping process for corn stover and other nonwood fibrous materials |
| CN1737255A (en) * | 2005-09-02 | 2006-02-22 | 华南理工大学 | Paper pulp cleaning and bleaching process |
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| US5658429A (en) * | 1991-04-30 | 1997-08-19 | Eka Nobel Ab | Process for bleaching of lignocellulose-containing pulp using a chelating agent prior to a peroxide-ozone-peroxide sequence |
| US5785812A (en) * | 1992-11-27 | 1998-07-28 | Eka Nobel Ab | Process for treating oxygen delignified pulp using an organic peracid or salt, complexing agent and peroxide bleach sequence |
| US6123809A (en) * | 1996-09-11 | 2000-09-26 | Solvay Interox (Societe Anony.) | Method for bleaching paper pulp |
| CN1371439A (en) * | 1999-08-30 | 2002-09-25 | 北卡罗来纳州立大学 | Pulping process for corn stover and other nonwood fibrous materials |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894906A (en) * | 2015-05-29 | 2015-09-09 | 华南理工大学 | High-efficiency clean bleaching method of wheat straw pulp |
| CN105603795A (en) * | 2016-01-18 | 2016-05-25 | 华南理工大学 | Micro-fabrillated cellulose producing method |
| CN105603795B (en) * | 2016-01-18 | 2017-10-20 | 华南理工大学 | A kind of method for producing cellulose fibril |
| CN109750548A (en) * | 2019-01-07 | 2019-05-14 | 华南理工大学 | A kind of paper pulp green method for bleaching and paper pulp obtained |
| CN115584653A (en) * | 2022-12-12 | 2023-01-10 | 河南禾力能源有限公司 | Method for extracting alpha-cellulose by furfural residues |
| CN115584653B (en) * | 2022-12-12 | 2023-03-10 | 河南禾力能源有限公司 | Method for extracting alpha-cellulose by furfural residues |
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Application publication date: 20150128 |