CN104066884B - The method of the fluorescence in reduction paper pulp - Google Patents
The method of the fluorescence in reduction paper pulp Download PDFInfo
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- CN104066884B CN104066884B CN201280064899.2A CN201280064899A CN104066884B CN 104066884 B CN104066884 B CN 104066884B CN 201280064899 A CN201280064899 A CN 201280064899A CN 104066884 B CN104066884 B CN 104066884B
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- sodium hypochlorite
- chlorine dioxide
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- fluorescence
- paper pulp
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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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/022—Chemicals therefor
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
-
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
-
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
-
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Paper (AREA)
Abstract
The present invention relates to the method reducing fluorescence in the paper pulp of recirculation, wherein the method includes: make the pulp containing fluorescent agent contact with chlorine dioxide；It is enough to reduce the sodium hypochlorite component contacts of the fluorescence in paper pulp with making pulp with amount；Wherein paper pulp contact with chlorine dioxide simultaneously or after with sodium hypochlorite component contacts.
Description
Invention field
The field of the invention relates to by the pulp source containing fluorescent agent, for instance the paper of recirculation, produces paper pulp and paper.More particularly the present invention relate to reduce in paper pulp and paper or eliminate fluorescence.
Background of invention
Fluorescence is a kind of optical phenomena, and wherein the light (such as, ultraviolet light) of nonvisible wavelength is absorbed, and is then re-emitted with visible wavelength.The chemicals being referred to as " fluorescent whitening agent " or " optical brightener " or " FWA " or " OBA " is often added in the raw material of the product producing many fine paper (such as, printing or copy paper) and medicated napkin and napkin rank to improve the apparent brightness of product.The compound that FWA is typically based on and their chemicals derivant.
When the paper product containing FWA is recycled, most of fluorescent chemicalses retain in the fibre in process recycling.It is reported, due to the color in the de inked pulp factory using recycled fibers and paper mill and brilliance control, which results in certain operations problem.FWA can change the apparent colour of de inked pulp, and damages or change the final mass of final products.The existence of FWA can affect the response of the online color sensor based on UV, and can negatively affect the performance controlling circulation.
Additionally, also suspect FWA can due in the paper product prepared from the fiber of recirculation drop go out and bring potential health risk.Do not allow to use FWA in some food stage are packed.Accordingly, it would be desirable to FWA is removed from the fiber of the recirculation being intended for the application of such food stage.
Accordingly, it would be desirable to reduce from the paper pulp of recirculation in an efficient way or eliminate FWA.
Summary of the invention
It has been found that the fluorescence in the paper pulp of recirculation can reduce by the following method, the method includes making the paper pulp containing fluorescent agent and the chlorine dioxide (ClO measuring the fluorescence being enough to reduce paper pulp2) contact with the combination of sodium hypochlorite (or derivant of sodium hypochlorite), wherein paper pulp is at this paper pulp and ClO2Contacting with sodium hypochlorite simultaneously or after of contact.
In one embodiment, ClO2It is simultaneously introduced paper pulp with sodium hypochlorite component, or sodium hypochlorite component is being added ClO2Adding in the rear short time, wherein sodium hypochlorite component contains sodium hypochlorite, the derivant of sodium hypochlorite, or their mixture.
In one embodiment, ClO2It is simultaneously introduced paper pulp with sodium hypochlorite, or sodium hypochlorite is being added ClO2Add in the rear short time.In embodiments of the present invention, sodium hypochlorite is adding ClO2After less than about 2 minutes, or less than about 1 minute, or less than about 30 seconds, or less than about 10 seconds, or less than about 5 seconds, or less than about 1 second in add.In one embodiment, ClO2It is added simultaneously to paper pulp with sodium hypochlorite.
In embodiments of the present invention, the ClO of paper pulp is added2Weight range about 4 to about 15kg/t (1000kg) dry pulp, or about 5 to about 10kg/t, or about 6 to about 8kg/t.In embodiments of the present invention, add paper pulp sodium hypochlorite weight range about 2 to about 12.5kg/t dry pulp, or about 2.5 to about 8kg/t, or about 3 to about 6kg/t.In one embodiment, ClO2Consumption more than the consumption (by weight) of sodium hypochlorite.In embodiments of the present invention, ClO2With the weight ratio of sodium hypochlorite at 1:1 to 3:1, or 1.1:1 to 2:1, or 1.2:1 to 1.8:1, or about 3:2.In other embodiments of the present invention, also include relatively low chemicals charging, although and fluorescence be not lowered to zero or close to zero, but a small amount of fluorescence reduces and is also included within embodiments of the present invention.
After close examination following description after close examination following description, other purpose, advantage and novel feature all will be apparent to those skilled in the art.
Accompanying drawing is sketched
Fig. 1 is the schematic diagram adopting up flow type reaction vessel fluorescence to reduce method.
Fig. 2 shows to add, for embodiment 1 hypochlorite, the figure postponed brightness and the effect of fluorescence.
Fig. 3 shows to add, for embodiment 1 hypochlorite, the figure postponing the effect to L-value.
Fig. 4 shows to add, for embodiment 1 hypochlorite, the figure postponed whiteness and the effect of tone.
Fig. 5 shows to add, for embodiment 1 hypochlorite, the figure postponing the effect to a and b value.
Fig. 6 shows for embodiment 2 the chemicals order figure to the effect of fluorescence.
Fig. 7 shows for embodiment 3 chlorine dioxide charge figure to the effect of fluorescence.
Fig. 8 shows embodiment 3 to be answered to the chlorine dioxide charge figure to pH and the effect of residual chlorine dioxide.
Fig. 9 shows for embodiment 3 chlorine dioxide charge figure to pH and the effect of residual chlorine dioxide.
Figure 10 shows to add, for embodiment 4 sodium hypochlorite, the figure postponed brightness and the effect of fluorescence.
Figure 11 shows to add, for embodiment 4 sodium hypochlorite, the figure postponed whiteness and the effect of tone.
Detailed Description Of The Invention
On the one hand, the method according to the invention includes processing waste paper and comprises paper pulp and the pulp of fluorescent agent (such as FWA) to be formed, or the process stream (paper pulp, paper) containing fluorescence simultaneously it is applied to before sodium hypochlorite with by chlorine dioxide.The slurry concentration (consistency) of pulp add before chlorine dioxide can scope about 4% to about 20%, or about 6% to about 18%, or about 8% to about 16%.Can also operate under the slurry concentration lower than 4%, for instance, coordinate the existing process stream in pulp mill or paper mill, but still the present invention can be benefited from, however, it is believed that when being generally lower than 1%, the benefit adding sodium hypochlorite can be lost.In one embodiment, the delay between two kinds of chemicals interpolations is less long so that no longer there is residual chlorine dioxide.
Preferably, the reaction of at least five minutes should be had to remain after sodium hypochlorite adds.
In embodiments of the present invention, described method is described as making paper pulp contact with chlorine dioxide and sodium hypochlorite." contact " refers to, chemicals (contact paper pulp) adds to pulp, or original position is formed by the reaction of the precursor chemical of formation desired chemicals.Such as, can be formed at pulp situ according to the present invention, chlorine dioxide or sodium hypochlorite, and other chemicals can add slurry, or chlorine dioxide and sodium hypochlorite all can original position be formed.In embodiments of the present invention, chlorine dioxide or sodium hypochlorite, or both, can be formed at process equipment separately or process stream situ, be subsequently adding pulp.
Make (paper pulp) to contact with sodium hypochlorite although embodiments of the present invention there is described herein or add sodium hypochlorite (to paper pulp), it will be appreciated that, other embodiment of the present invention also includes adopting sodium hypochlorite derivant, replaces sodium hypochlorite (or in combination)." sodium hypochlorite derivant " refers to, the chemical compound that one or more following reasons produce: by sodium hypochlorite with chlorine dioxide according to present invention introduces pulp, due to the dissociating or the reaction of sodium hypochlorite and other compound of sodium hypochlorite in slurry during fluorescence minimizing method, the existence of this chemical compound improves fluorescence compared with independent chlorine dioxide and reduces.For example, it is believed that under certain conditions, sodium hypochlorite will form hypochlorous acid in the solution of pulp.Therefore, hypochlorous acid is considered the derivant of sodium hypochlorite, adds independent hypochlorous acid, or combines with sodium hypochlorite, to paper pulp and chlorine dioxide also in the scope of embodiment of the present invention.
The example of technological process is provided below in Fig. 1.With reference to Fig. 1, before the paper pulp that 12% slurry concentration carried by concentration pump (MC) is starched in centre, chlorine dioxide enters.Sodium hypochlorite is directly added into dynamic chemical product blender after less than one second.Starch under concentration at height, air pocket can be typically formed around impeller.In order to avoid so, being mounted with degassed pump.The some form of neutralization chemicals for chlorine compound is fed this degassed pump, is namely applied to gas rather than arrives paper pulp stream.Chlorine dioxide and sodium hypochlorite are sufficiently mixed into paper pulp about 20 minutes, subsequently into up flow type tower.
Delay between two kinds of chemicals can affect optical property in addition to fluorescence, it is possible to finds out strategy to optimize these optical properties according to the enforcement of the present invention.
In one embodiment, the reaction of two kinds of chemicals occurs in the single stage.Although show in particular reaction vessel in Fig. 1, but in other embodiments, pipeline can be enough, this is because implement the present invention to need the relatively short response time.
In embodiments of the present invention, the pH of chlorine dioxide/sodium hypochlorite/paper pulp stream can regulate with pH regulator chemicals (acid, alkali or buffer agent).In embodiments of the present invention, by the pH regulator to the scope value in about 2 to about 7.Specific target pH generally depends on system.Such as, in the clean system of fluorescence about 5, pH can scope about 2 to about 5, or about 2 to about 4.If system is seriously cushioned by such as calcium carbonate, then pH is likely to higher, for instance in the scope of about 4.5 to about 7.And, chlorine dioxide charge will reduce pH, and sodium hypochlorite is reinforced will improve pH.
In embodiments of the present invention, fluorescence reduces the temperature of method (treated pulp) and is maintained at about 40 DEG C to about 85 DEG C, or the scope of about 65 DEG C to about 80 DEG C.
Although MC paper pulp and chemical mixer are in some embodiments, also included, no matter whether mixing realizes, some fluorescence all will be occurred to reduce.
It is believed that series connection applies the chemicals removing fluorescence of chlorine dioxide and sodium hypochlorite needs less than individually applying chlorine dioxide or sodium hypochlorite, and only need a step.
When comparing with independent sodium hypochlorite, the method according to the invention has and is capable of zero or additional benefits close to zero fluorescence.It is believed that zero fluorescence is impossible for independent sodium hypochlorite, or be very difficult to realization to I haven't seen you for ages.Therefore, in one embodiment of the invention, chlorine dioxide and sodium hypochlorite are with enough interpolations, and gained paper pulp is maintained at and is enough to realize substantially zero or when zero fluorescence.Substantially zero referring to, when measuring with TechnidyneColorTouch (CTH-ISO), fluorescence is 0.25 or lower.
When comparing with independent chlorine dioxide, the method according to the invention decreases chemicals and feeds in raw material, and also prevents venting simultaneously.Venting is owing to when technique terminates, the residual chlorine dioxide of high concentration causes, and if sucked by workman, potential danger can be caused.When chlorine dioxide and sodium hypochlorite combined according to the invention add fashionable, remaining ClO2It is lowered, for instance, when needs maximum fluorescence reduces, it is lowered to 1/10th of former surplus.
In one embodiment, fluorescence reduces method and any bleaching or brightens step and carry out dividually, and the purpose in wherein bleaching/brightening is to improve brightness and/or whiteness.In such embodiment, fluorescent method is not result in brightness and improves, or only relatively small brightness improves.In embodiments of the present invention, the brightness caused owing to carrying out fluorescence to reduce method improves lower than about 5ISO, or lower than about 0ISO.In one embodiment, fluorescence reduces method and carries out in any bleaching or before brightening step.
In embodiments of the present invention, fluorescence reduces method and adopts up flow type tower or pipeline to carry out, wherein after chlorine dioxide and sodium hypochlorite all add pulp, the time of staying less than about 30 minutes, or less than about 25 minutes, or less than about 20 minutes.In one embodiment, the time of staying can be low to moderate 7 minutes, but still have good fluorescence and reduce effect.
To the above-mentioned General Discussion of the present invention by by detail below but non-limiting embodiment further illustrate.
Following example include evaluating is adding ClO2The late effect of rear interpolation sodium hypochlorite, is added separately independent ClO2With the effect in long response time, the effect of chemicals addition is, and implement the effect of the present invention brightness to paper and whiteness.
Embodiment 1
D-H two step, the thickening between D and H
Paper pulp first with chlorine dioxide reaction, be then thickened to about 25% slurry concentration, be diluted to 11% slurry concentration and process with sodium hypochlorite further.The ClO added2Amount is the dry pulp of 2.5kg/ ton (1000kg), and amount sodium chlorite is the 1.785kg/ dry pulp paused.The total response time of two steps is 7 minutes.Work before shows, minute after react and terminate.The chlorine dioxide time is 0,2,3.5 and 5 minutes.Zero represents the base case that two of which chemicals adds simultaneously.The slurry concentration of chlorine dioxide and sodium hypochlorite reaction is 11% and temperature 71 DEG C.Result is shown in Fig. 2.
The analysis of Fig. 2 is shown, postponing owing to sodium hypochlorite adds, fluorescence improves, and the delay being even as short as 2 minutes is also such.And, once such loss occurrence, fluorescence is not had other impact by the delay of increase.
Paper color can by three coordinate L in the system being called CIELAB*、a*And b*Limit, wherein L*It is brightness, a*It is red-green degree, b*It it is Huang-indigo plant degree.These values and other optical property measurement are that sodium chlorite adds the relation postponed.The effect of L-value is shown in Fig. 3, tone is shown in Fig. 4.
The analysis of Fig. 3 and 4 is shown, brightness L*Value increases in the way of similar with fluorescence with whiteness.When including ultraviolet light (UVin) and when get rid of ultraviolet light time (UVex) have these value addeds.
Being different from fluorescence, light color not only postpones to increase along with first time, but also increases along with the delay of sodium hypochlorite interpolation and continue to increase.
The effect of a and b value is shown in Fig. 5.The analysis of Fig. 5 is shown, postpones a*The effect of value is only small or does not have, but b*Value decline, and during UVin decline more than UVex time.
Embodiment 2
H-D, wherein not washing or thickening between D and H
The combination of chlorine dioxide and sodium hypochlorite of the wastepaper (MOW) of mixing processes with dual stage process.In first method, chlorine dioxide is mixed with paper, and add sodium hypochlorite after 5 minutes, then mix further.Total residence time is 20 minutes and temperature is 71 DEG C.
In the second approach, add chlorine dioxide and individually react 20 minutes.Then sodium hypochlorite is added when not having intermediate washings or thickening paper.The time of staying in this stage is also 20 minutes, and total residence time is 40 minutes.Result is shown in Fig. 6.
The analysis of Fig. 6 is shown, although the time of only half, fluorescence first method and residual chemicals is all reduced.Brightness and whiteness all reduce for D+H method.
Embodiment 3
FR method-zero fluorescence reduces
The paper of recirculation contains the wastepaper of mixing, and its original intensity is 89.95%ISO, and including UV, and fluorescence is 12.4, combines with chlorine dioxide and sodium hypochlorite and processes, and two of which chemicals adds simultaneously.
Chlorine dioxide charge changes from 0 to 15.5kg/t, and sodium hypochlorite adds with 2.9kg/t and 5kg/t.Paper is bleached 15 minutes in the constant temperature bath be set in 68C.PH is not adjusted and makes it with reaction fluctuation.Brightness and fluorescence adopt D65 illuminating agent TechnidyneColorTouch measurement amount.Result is shown in Fig. 7.
To analysis chart 7 show, chlorine dioxide charge 6kg/t and with 5kg/t sodium hypochlorite time, fluorescence decreases below zero.When sodium hypochlorite is reduced to 2.9kg/t, it does not have realize zero fluorescence.
Measure ClO2Measure pH and remaining ClO2Effect.Result is shown in Fig. 8 and 9.
To analysis chart 8 and 9 show, reinforced for two kinds of sodium hypochlorite, remaining ClO2Less than 0.01gpl.Other sodium hypochlorite is also used for when 0.5 fluorescence and from 3.2, pH is increased to 4.5.
In embodiment 4-D → H single stage, between D and H, there is no thickening or washing
The paper of recirculation is at single stage and chlorine dioxide and sodium hypochlorite reaction.Sodium hypochlorite adds and changed with 0,2,5,10,15 and 18 minutes, and wherein zero represents interpolation (base case) simultaneously.Do not carry out washing or thickening between two kinds of chemicals.Total residence time is 20 minutes for all experiments；Slurry concentration be 11% and temperature be 71.1 DEG C.The function that Effect Evaluation is the time delay adding sodium hypochlorite to brightness and whiteness.Result is shown in Figure 10 and 11.
To analysis Figure 10 show, the fluorescence of all experiments is all 1.6 to 2.1.Although the distribution of data seems notable, but great majority point all has the fluorescence lower than base case, and this shows to postpone do not have adverse effect or only little adverse effect.
The analysis of Figure 10 and 11 is further demonstrated that, for the sodium hypochlorite interpolation initial delay of 2 minutes of UVin and UVex, brightness and whiteness all improve, and postpone for first time, and tone also improves.Sodium hypochlorite for increasing postpones, and all parameters all keep relative constancy.
Claims (9)
1. the method reducing fluorescence in the paper pulp of recirculation, described method includes:
A) pulp containing fluorescent agent is made to contact with chlorine dioxide；
B) described pulp and the sodium hypochlorite component contacts being selected from measuring the fluorescence being enough to reduce described paper pulp are made: sodium hypochlorite, at least one sodium hypochlorite derivant or their combination；
Wherein chlorine dioxide and sodium hypochlorite component are simultaneously introduced paper pulp, or add sodium hypochlorite component after adding chlorine dioxide in 2 minutes,
Wherein chlorine dioxide and the weight ratio of described sodium hypochlorite component are at 1:1-3:1.
2. method according to claim 1, wherein paper pulp contact with chlorine dioxide in latter 30 seconds with described sodium hypochlorite component contacts.
3. method according to claim 2, wherein paper pulp contacts with described sodium hypochlorite component and chlorine dioxide simultaneously.
4. the method according to any one of claim 1-3, the weight range of the described chlorine dioxide component wherein contacted with paper pulp is at the dry pulp of 4-15kg/t.
5. the method according to any one of claim 1-3, the weight range of the described sodium hypochlorite component wherein contacted with paper pulp is at the dry pulp of 2-12.5kg/t.
6. the method according to any one of claim 1-3, wherein chlorine dioxide and the weight ratio of described sodium hypochlorite component are at 1.2:1-1.8:1.
7. the method according to any one of claim 1-3, wherein pulp consistent degree scope before contacting with chlorine dioxide is at 4%-20%.
8. the method according to any one of claim 1-3, farther includes to add pH regulator chemicals, and its amount is by the pH regulator of pulp to the scope value at 2-7.
9. the method according to any one of claim 1-3, wherein sodium hypochlorite component is sodium hypochlorite.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161580931P | 2011-12-28 | 2011-12-28 | |
| US61/580,931 | 2011-12-28 | ||
| PCT/EP2012/076534 WO2013098219A1 (en) | 2011-12-28 | 2012-12-21 | Process for reducing fluorescence in pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104066884A CN104066884A (en) | 2014-09-24 |
| CN104066884B true CN104066884B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201280064899.2A Active CN104066884B (en) | 2011-12-28 | 2012-12-21 | The method of the fluorescence in reduction paper pulp |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP2798121B1 (en) |
| JP (1) | JP6153943B2 (en) |
| KR (1) | KR102011081B1 (en) |
| CN (1) | CN104066884B (en) |
| AR (1) | AR089608A1 (en) |
| AU (1) | AU2012361026B2 (en) |
| BR (1) | BR112014015834B1 (en) |
| CA (1) | CA2859061C (en) |
| ES (1) | ES2601899T3 (en) |
| IN (1) | IN2014DN06137A (en) |
| TW (1) | TWI643998B (en) |
| WO (1) | WO2013098219A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900113A (en) * | 1994-09-26 | 1999-05-04 | Nalco Chemical Company | Method of using fluorescent tracers to monitor chlorine dioxide in pulp and paper processes |
| JPH11269788A (en) * | 1998-03-19 | 1999-10-05 | Mitsubishi Paper Mills Ltd | Fluorescence elimination of fluorescent dye-containing old paper or papermaking white water |
| CN101161926A (en) * | 2006-10-10 | 2008-04-16 | 日本化药株式会社 | Regeneration processing method for waste paper |
| CN102230291A (en) * | 2011-06-16 | 2011-11-02 | 黑龙江省造纸研究所有限公司 | Method for removing fluorescent substance in waste paper pulp |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2987508B2 (en) * | 1990-03-05 | 1999-12-06 | 株式会社リコー | Reversible thermosensitive recording material |
| JPH0491284A (en) * | 1990-08-03 | 1992-03-24 | Honshu Paper Co Ltd | Method for eliminating fluorescent reaction in waste paper |
| JPH0819630B2 (en) * | 1991-07-29 | 1996-02-28 | 日本製紙株式会社 | Method of erasing fluorescence in waste paper |
| JPH05148783A (en) * | 1991-11-29 | 1993-06-15 | Kanzaki Paper Mfg Co Ltd | Method for pulping waste paper of heat-sensitive recording chart |
| US7377993B2 (en) * | 2004-03-03 | 2008-05-27 | Tanya Smith Richardson | Methods for reducing fluorescence in pulp and paper |
-
2012
- 2012-12-21 EP EP12808826.7A patent/EP2798121B1/en active Active
- 2012-12-21 KR KR1020147021095A patent/KR102011081B1/en active IP Right Grant
- 2012-12-21 IN IN6137DEN2014 patent/IN2014DN06137A/en unknown
- 2012-12-21 BR BR112014015834-7A patent/BR112014015834B1/en active IP Right Grant
- 2012-12-21 ES ES12808826.7T patent/ES2601899T3/en active Active
- 2012-12-21 CA CA2859061A patent/CA2859061C/en active Active
- 2012-12-21 AU AU2012361026A patent/AU2012361026B2/en active Active
- 2012-12-21 JP JP2014549443A patent/JP6153943B2/en active Active
- 2012-12-21 WO PCT/EP2012/076534 patent/WO2013098219A1/en active Application Filing
- 2012-12-21 CN CN201280064899.2A patent/CN104066884B/en active Active
- 2012-12-28 TW TW101150982A patent/TWI643998B/en active
- 2012-12-28 AR ARP120105075 patent/AR089608A1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900113A (en) * | 1994-09-26 | 1999-05-04 | Nalco Chemical Company | Method of using fluorescent tracers to monitor chlorine dioxide in pulp and paper processes |
| JPH11269788A (en) * | 1998-03-19 | 1999-10-05 | Mitsubishi Paper Mills Ltd | Fluorescence elimination of fluorescent dye-containing old paper or papermaking white water |
| CN101161926A (en) * | 2006-10-10 | 2008-04-16 | 日本化药株式会社 | Regeneration processing method for waste paper |
| CN102230291A (en) * | 2011-06-16 | 2011-11-02 | 黑龙江省造纸研究所有限公司 | Method for removing fluorescent substance in waste paper pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2798121A1 (en) | 2014-11-05 |
| WO2013098219A1 (en) | 2013-07-04 |
| CA2859061A1 (en) | 2013-07-04 |
| TWI643998B (en) | 2018-12-11 |
| ES2601899T3 (en) | 2017-02-16 |
| AU2012361026A1 (en) | 2014-06-05 |
| AU2012361026B2 (en) | 2016-09-15 |
| IN2014DN06137A (en) | 2015-08-14 |
| AR089608A1 (en) | 2014-09-03 |
| JP2015503681A (en) | 2015-02-02 |
| BR112014015834A2 (en) | 2017-06-13 |
| TW201344008A (en) | 2013-11-01 |
| CN104066884A (en) | 2014-09-24 |
| BR112014015834B1 (en) | 2021-06-08 |
| JP6153943B2 (en) | 2017-06-28 |
| KR102011081B1 (en) | 2019-08-14 |
| KR20140107640A (en) | 2014-09-04 |
| CA2859061C (en) | 2020-01-14 |
| EP2798121B1 (en) | 2016-10-12 |
| BR112014015834A8 (en) | 2017-07-04 |
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