CA2654187A1 - Improved process for manufacturing pulp, paper and paperboard products - Google Patents

Improved process for manufacturing pulp, paper and paperboard products Download PDF

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Publication number
CA2654187A1
CA2654187A1 CA002654187A CA2654187A CA2654187A1 CA 2654187 A1 CA2654187 A1 CA 2654187A1 CA 002654187 A CA002654187 A CA 002654187A CA 2654187 A CA2654187 A CA 2654187A CA 2654187 A1 CA2654187 A1 CA 2654187A1
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CA
Canada
Prior art keywords
pulp
mechanical
bleaching
bleaching agents
process according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002654187A
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French (fr)
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CA2654187C (en
Inventor
Xuan Truong Nguyen
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International Paper Co
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Individual
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Publication of CA2654187A1 publication Critical patent/CA2654187A1/en
Application granted granted Critical
Publication of CA2654187C publication Critical patent/CA2654187C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • 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

A process for bleaching mechanical wood pulp is provided comprising subjecting the wood pulp to at least one bleaching stage with one or more bleaching agents in the presence of one or more optical brightening agent, wherein the bleaching agents are selected from the group consisting of oxidative bleaching agents other than chlorine based bleaching agents such as chlorine dioxide, elemental chlorine or a combination thereof, reductive bleaching agents or any combination of two or more thereof.

Claims (20)

1. An improved process for manufacturing brightened mechanical pulp comprising treating the pulp with one or more optical brightening agents in the presence of one or more bleaching agents, wherein the bleaching agents are selected from the group consisting of bleaching agents other than chlorine based bleaching agents.
2. A process according to claim 1 wherein said pulp id treated in the presence of active bleaching agents.
3 A process according to claim 1 wherein said pulp is treated in the presence of spent bleaching agents.
4. A process according to claim 1 wherein said bleaching agent comprises peroxide.
5. A bleached mechanical pulp having an ISO brightness equal to or greater than about 90 and pulp mixtures comprising such mechanical pulp.
6. An improved process for forming bleached mechanical pulp of the type comprising:

(a) a mechanical refining stage wherein wood chips are mechanically refined to form mechanical refined wood pulp; and (b) a bleaching stage wherein said mechanical refined wood pulp is bleached in one or more bleaching stages to form a bleached mechanical refined wood pulp;

the improvement comprising bleaching the mechanical refined wood pulp with one or more bleaching agents in the presence of one or more optical brightening agent, said bleaching agents selected from the group consisting of oxidative bleaching agents other than chlorine based bleaching agents such as chlorine dioxide, elemental chlorine or a combination thereof, reductive bleaching agents or any combination of two or more thereof.
7. An improved pulping and paper making process of the type comprising:

(a) a mechanical refining stage wherein wood chips are mechanically refined to form mechanical refined wood pulp, (b) a bleaching stage wherein said mechanically refined wood pulp is bleached in one or more bleaching stages to form bleached mechanical refined aspen wood pulp, (c) a furnish forming stage wherein an aqueous paper making stock furnish comprising said bleached mechanical refined wood pulp is formed;

(d) a furnish depositing stage wherein said furnish is deposited on a forming wire of a paper making machine to form a wet paper web; and (e) a wet paper web drying stage wherein said wet paper web to form a first dried paper web, the improvement comprising bleaching the mechanical refined wood pulp with one or more bleaching agents in the presence of one or more optical brightening agent, said bleaching agents selected from the group consisting of oxidative bleaching agents other than chlorine based bleaching agents such as chlorine dioxide, elemental chlorine or a combination thereof, reductive bleaching agents or any combination of two or more thereof.
8. A paper or paper board web comprising bleached mechanical pulp having an ISO
brightness equal to or greater than about 90.
9. The paper or paper board web according to Claim 8 having from 10 to 20%
bulk enhancement.
10. A process for manufacturing brightened pulp, comprising treating the pulp with one or more optical brightening agents in the presence of one or more bleaching agents, wherein the bleaching agents are selected from the group consisting of bleaching agents other than chlorine based bleaching agents.
11. The process according to Claim 10, wherein the pulp is a mixture of mechanical and chemical fibers.
12. The process according to Claim 11, wherein the mechanical fibers have a Canadian Standard Freeness of at least 200 csf and a shive content of not more than 0.5%.
13. The process according to Claim 12, wherein the mechanical fibers are CTMP.
14. The process according to claim 13, further comprising pre-treating the chemical fibers with at least one bleaching stage in the presence of at least one chlorine based bleaching agent.
15. The process according to Claim 14, wherein the pulp comprises from 20 to 80wt% of mechanical fibers and from 20 to 80 wt% to of chemical fibers based upon the total dry weight of the fibers.
16. The process according to Claims 15, wherein from 0.5 to 10 wt% of bleaching agent based upon the total dry weight of the pulp and from 0.1 to 2wt% of optical brightener based upon the total dry weight of the pulp is used in the treatment of the pulp.
17. The process according to Claim 16, wherein said treating is performed in the presence of from 1.0 to 8.0wt% of stabilizer based upon the total dry weight of the pulp.
18. The process according to Claim 17, wherein the treating is for a time period of from 0.5 to 10 hours at a temperature of from 25 to 120°C, at a fiber consistency of at least 10%.
19. A mixture of mechanical and chemical fibers made from the process according to Claim 18 and having an ISO brightness that is at least 90 ISO points.
20. A paper or paperboard substrate, comprising the mixture of mechanical and chemical fibers according to Claim 19 and having an ISO brightness that is at least 90 ISO points.
CA2654187A 2006-06-02 2007-06-04 Improved process for manufacturing pulp, paper and paperboard products Expired - Fee Related CA2654187C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/446,421 2006-06-02
US11/446,421 US7967948B2 (en) 2006-06-02 2006-06-02 Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents
PCT/US2007/013103 WO2007143182A2 (en) 2006-06-02 2007-06-04 Improved process for manufacturing pulp, paper and paperboard products

Publications (2)

Publication Number Publication Date
CA2654187A1 true CA2654187A1 (en) 2007-12-13
CA2654187C CA2654187C (en) 2013-01-08

Family

ID=38686719

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2654187A Expired - Fee Related CA2654187C (en) 2006-06-02 2007-06-04 Improved process for manufacturing pulp, paper and paperboard products

Country Status (5)

Country Link
US (4) US7967948B2 (en)
EP (1) EP2054548A2 (en)
CA (1) CA2654187C (en)
RU (1) RU2424388C2 (en)
WO (1) WO2007143182A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11725338B2 (en) 2014-03-25 2023-08-15 Basf Se Method for producing bleached wood fibre material

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7914646B2 (en) * 2006-07-21 2011-03-29 Nalco Company Compositions and processes for paper production
CA2547276A1 (en) * 2006-05-19 2007-11-19 Abitibi-Consolidated Inc. Coated mechanical pulp paper
US7967948B2 (en) 2006-06-02 2011-06-28 International Paper Company Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents
PL2148700T3 (en) 2007-05-23 2015-08-31 Int Paper Co Compositions and particles containing cellulosic fibers and stabilized- and/or activated- urease inhibitors, as well as methods of making and using the same
US8298373B2 (en) * 2008-02-07 2012-10-30 University Of New Brunswick Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents
PT2260145E (en) * 2008-03-26 2012-09-18 Clariant Finance Bvi Ltd Improved optical brightening compositions
FI20085345L (en) * 2008-04-22 2009-10-23 Kemira Oyj Method for reducing light-induced yellowing in lignin-containing material
RU2507335C2 (en) 2008-06-20 2014-02-20 Интернэшнл Пэйпа Кампани Composition and sheet for records with improved optical characteristics
EP2192230B2 (en) 2008-11-27 2020-01-01 Clariant Finance (BVI) Limited Optical brightening compositions for high quality inkjet printing
US8404628B1 (en) * 2008-12-08 2013-03-26 Hbi Branded Apparel Enterprises, Llc Method for spray bleaching cellulosic fabrics
US20100140545A1 (en) * 2008-12-08 2010-06-10 May Ruth E Compositions for spray bleaching cellulosic fabrics
US9932709B2 (en) * 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
CA2770082C (en) 2009-08-05 2014-09-30 International Paper Company Dry fluff pulp sheet additive
MY162376A (en) 2009-08-05 2017-06-15 Shell Int Research Method for monitoring a well
ES2955492T3 (en) 2009-08-05 2023-12-01 Int Paper Co Process for applying a composition containing a cationic trivalent metal and a release agent and fluff pulp sheet manufactured therefrom
WO2011085038A1 (en) * 2010-01-06 2011-07-14 Sustainable Health Enterprises (She) Highly absorbent and retentive fiber material
EP2550393A2 (en) * 2010-03-23 2013-01-30 International Paper Company Improved bctmp filtrate recycling system and method
PL2588666T3 (en) * 2010-07-01 2019-03-29 Archroma Ip Gmbh Aqueous compositions for whitening and shading in coating applications
US8465624B2 (en) 2010-07-20 2013-06-18 International Paper Company Composition containing a multivalent cationic metal and amine-containing anti-static agent and methods of making and using
CN103003488B (en) 2010-07-22 2015-04-15 国际纸业公司 Process for preparing fluff pulp sheet with cationic dye and debonder surfactant and fluff pulp sheet made from same
PT2596170T (en) * 2010-07-23 2018-07-30 Archroma Ip Gmbh Method for preparing white paper
WO2012170183A1 (en) * 2011-05-23 2012-12-13 Gp Cellulose Gmbh Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same
US9267240B2 (en) * 2011-07-28 2016-02-23 Georgia-Pacific Products LP High softness, high durability bath tissue incorporating high lignin eucalyptus fiber
EP2802708B1 (en) 2012-01-12 2020-12-23 GP Cellulose GmbH A low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same
US9879361B2 (en) 2012-08-24 2018-01-30 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
JP6472758B2 (en) 2013-02-08 2019-02-20 ゲーペー ツェルローゼ ゲーエムベーハー Softwood kraft fiber with improved α-cellulose content and its use in the production of chemical cellulose products
EP2781648B1 (en) 2013-03-21 2016-01-06 Clariant International Ltd. Optical brightening agents for high quality ink-jet printing
JP6461181B2 (en) 2014-02-21 2019-01-30 ドムター ペーパー カンパニー， エルエルシー Fiber-reinforced cement composite material and manufacturing method thereof
KR101863620B1 (en) 2014-02-21 2018-07-05 돔타르 페이퍼 컴퍼니 엘엘씨 Surface enhanced pulp fibers at a substrate surface
US11473245B2 (en) 2016-08-01 2022-10-18 Domtar Paper Company Llc Surface enhanced pulp fibers at a substrate surface
WO2018075627A1 (en) 2016-10-18 2018-04-26 Domtar Paper Company, Llc Method for production of filler loaded surface enhanced pulp fibers
WO2019121411A1 (en) 2017-12-22 2019-06-27 Archroma Ip Gmbh Optical brightener for whitening paper
CA3088962A1 (en) 2018-02-05 2019-08-08 Harshad PANDE Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
PL3623392T3 (en) 2018-09-14 2024-01-15 Archroma Ip Gmbh Optically brightened latexes
WO2020198516A1 (en) 2019-03-26 2020-10-01 Domtar Paper Company, Llc Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same
CA3122786A1 (en) * 2021-06-18 2022-12-18 Sixring Inc. Temperature-controlled delignification of biomass

Family Cites Families (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527563A (en) * 1947-08-13 1950-10-31 Buffalo Electro Chem Co Method of bleaching semichemical pulps
NO109292C (en) * 1962-07-16
SE303088B (en) 1963-05-31 1968-08-12 Defibrator Ab
US3467574A (en) 1966-06-14 1969-09-16 Crown Zellerbach Corp Refiner bleaching of high yield pulps
US3661320A (en) 1970-01-19 1972-05-09 David Donaldson Egg carton
US3804944A (en) 1970-10-02 1974-04-16 Virginia Chemicals Inc Sodium dithionite solution stablization
US3847363A (en) 1972-10-20 1974-11-12 Reinhall Rolf Device in grinding apparatus for vegetable or fibrous material
US4312634A (en) * 1972-12-06 1982-01-26 Jerome Katz Method for treating cellulosic materials prior to bleaching
JPS5653557B2 (en) * 1973-10-15 1981-12-19
SE7317565L (en) 1973-12-28 1975-06-30 Selander Stig Daniel
US3873412A (en) 1974-04-01 1975-03-25 Bauer Bros Co Mechanically refining a mixture of kraft and semichemical pulp
US3985674A (en) 1974-12-10 1976-10-12 Virginia Chemicals Inc. Stabilized sodium dithionite solutions
US4187141A (en) * 1975-02-24 1980-02-05 Alf Societe Anonyme Method of producing bleached mechanical pulp
SE413601B (en) 1976-06-30 1980-06-09 American Defibrator SET FOR MANUFACTURING THE FIBER MASS IN A UNDERPRESSED MALAWARE AND DEVICE FOR IMPLEMENTATION OF THE SET
SE413784B (en) 1976-08-06 1980-06-23 Isel Sa SET AND DEVICE TO USE IN DEFIBRATION ZONE DEVELOPED HEAT TO MINIMIZE CONSUMPTION WHEN PREPARING MASS FOR FIBER DISC
DE2721084C3 (en) 1977-05-11 1981-02-26 Hoechst Ag, 6000 Frankfurt Mixtures of optical brighteners
US4225385A (en) 1979-01-15 1980-09-30 Westvaco Corporation Shive ratio analyzer
AU539108B2 (en) 1979-04-17 1984-09-13 Interox Societe Anonyme Delignification of unbleached chemical pulp
SE451202C (en) 1981-04-03 1988-11-22 Ole Axelson PROCEDURES FOR PREPARING CHEMICAL MECHANICAL
US4534954A (en) 1982-08-17 1985-08-13 Virginia Chemicals Inc. Sodium hydrosulfite slurries
FR2552125B1 (en) * 1983-09-16 1986-03-21 Interox PROCESS FOR THE TREATMENT OF CELLULOSIC MATERIALS BY OXIDIZING AGENTS
DE3406322A1 (en) 1984-02-22 1985-08-22 Basf Ag, 6700 Ludwigshafen STABILIZED, WATER-CONTAINING, ALKALINE-SET SODIUM DITHIONITE PREPARATIONS
US4699619A (en) * 1984-08-31 1987-10-13 Kimberly-Clark Corporation Absorbent structure designed for absorbing body fluids
SE8501246L (en) 1985-03-13 1986-09-14 Eka Ab SET TO MANUFACTURE IN BLEACH, CHEMICAL MECHANICAL AND SEMI-CHEMICAL FIBER MASS USING ONE-STEP IMAGRATION
US5002635A (en) * 1985-09-20 1991-03-26 Scott Paper Company Method for producing pulp using pre-treatment with stabilizers and refining
SE456168C (en) * 1987-02-27 1991-06-06 Mo Och Domsjoe Ab PROCEDURE PROVIDES LIGHTNESS STABILIZATION OF BLACK LIGNIN-CONTENT CELLULOSAMASSA
GB2215350B (en) 1988-03-16 1992-05-20 Thiokol Morton Inc Process for bleaching mechanical wood pulp
CA1340348C (en) 1989-03-23 1999-01-26 Michel Barbe Bleaching process for the production of high bright pulps
FI87372C (en) * 1989-03-30 1992-12-28 Genencor Int Europ Process for making fluff pulp with improved tearability
US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
US5389201A (en) * 1992-02-28 1995-02-14 International Paper Company Bleaching of kraft cellulosic pulp employing ozone and reduced consumption of chlorine containing bleaching agent
DE4230655A1 (en) 1992-09-14 1994-03-17 Ciba Geigy Process for improving the whiteness, brightness and color location of fibrous materials
US5292422A (en) 1992-09-15 1994-03-08 Ip Holding Company Modules for electrodeionization apparatus
US5616280A (en) * 1993-08-25 1997-04-01 Burlington Chemical Co., Inc. Bleaching composition
GB9412590D0 (en) 1994-06-23 1994-08-10 Sandoz Ltd Organic compounds
AU710648B2 (en) * 1994-12-09 1999-09-23 Procter & Gamble Company, The Absorbent composites and absorbent articles containing the same
US5766159A (en) 1995-07-06 1998-06-16 International Paper Company Personal hygiene articles for absorbing fluids
US5759349A (en) * 1995-12-14 1998-06-02 Westvaco Corporation Lumen loading of hygienic end use paper fibers
DE19614587A1 (en) 1996-04-13 1997-10-16 Jaschinski Thomas Dipl Holzw Process and bleaching solution for bleaching cellulosic fibers
US5876625A (en) * 1996-07-22 1999-03-02 Carnegie Mellon University Metal ligand containing bleaching compositions
US6379497B1 (en) * 1996-09-20 2002-04-30 Fort James Corporation Bulk enhanced paperboard and shaped products made therefrom
US5902454A (en) 1996-12-13 1999-05-11 Ciba Specialty Chemicals Corporation Method of whitening lignin-containing paper pulps
NZ331438A (en) 1997-09-16 2000-01-28 Ciba Sc Holding Ag A method of increasing the whiteness of paper by using a formulation containing a swellale layered silicate and an optical brightener 4,4-bis-(triazinylamino)-stilbene-2,2-disulphonic acid
EP0905317B1 (en) 1997-09-16 2009-12-23 Basf Se A method for optically brightening paper
US6059927A (en) * 1997-09-23 2000-05-09 Queen's University At Kingston Method of reducing brightness reversion and yellowness (B*) of bleached mechanical wood pulps
IT1296947B1 (en) 1997-12-10 1999-08-03 Donato Fausto De COMPOSITION FOR WHITENING THE WOOD PASTE AND RELATED PROCEDURE
GB9813248D0 (en) 1998-06-22 1998-08-19 Clariant Int Ltd Improvements in or relating to organic compounds
JP4694691B2 (en) * 1998-09-03 2011-06-08 ストゥラ エンソ アクチボラグ Paper or paperboard laminate and method for producing the laminate
US6599326B1 (en) * 1999-01-20 2003-07-29 Ciba Specialty Chemicals Corporation Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives
DE60027548T2 (en) * 1999-02-24 2007-04-26 Sca Hygiene Products Gmbh OXIDIZED CELLULOSE CONTAINING FIBER MATERIALS AND PRODUCTS MANUFACTURED THEREFROM
DE19953590A1 (en) 1999-11-08 2001-05-17 Sca Hygiene Prod Gmbh Cellulose-containing fibrous material, for tissue papers and tissue products used in personal grooming and hygiene, includes hydroxy groups oxidized at the glucose units to aldehyde and/or carboxy groups
US6723846B1 (en) 1999-09-10 2004-04-20 Ciba Specialty Chemicals Corporation Triazinylaminostilbene derivative as fluorescent whitening agents
GB9930247D0 (en) 1999-12-22 2000-02-09 Clariant Int Ltd Improvements in or relating to organic compounds
KR20020064990A (en) 2000-01-19 2002-08-10 웨이어해유저 컴파니 Superabsorbent cellulosic fiber
GB0100610D0 (en) 2001-01-10 2001-02-21 Clariant Int Ltd Improvements in or relating to organic compounds
CN100567471C (en) 2001-04-30 2009-12-09 西巴特殊化学品控股有限公司 Be used as the purposes of the metal complexes of oxide catalyst
US6743332B2 (en) 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US6649037B2 (en) 2001-05-29 2003-11-18 United States Filter Corporation Electrodeionization apparatus and method
US6527914B1 (en) 2002-01-30 2003-03-04 Ondeo Nalco Company Method of enhancing brightness and brightness stability of paper made with mechanical pulp
CN100346030C (en) 2002-03-06 2007-10-31 埃欧金生物制品公司 Xylanase treatment of chemical pulp
CA2377775A1 (en) 2002-03-18 2003-09-18 Gilles Bouchard Process for the manufacture of grades cfs#3, cfs#4 and cgw#4 coated paper from thermomechanical pulp with low freeness value and high brightness
US6893473B2 (en) * 2002-05-07 2005-05-17 Weyerhaeuser.Company Whitened fluff pulp
US6737486B2 (en) 2002-07-16 2004-05-18 Eastman Kodak Company Polymerization process
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
US7018509B2 (en) 2002-08-31 2006-03-28 International Paper Co. Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
US7176344B2 (en) * 2002-09-06 2007-02-13 Sca Hygiene Products Ab Sensoring absorbing article
ATE478195T1 (en) 2002-09-13 2010-09-15 Int Paper Co PAPER WITH IMPROVED STIFFNESS AND FULLNESS AND PRODUCTION THEREOF
US6876474B2 (en) 2002-11-27 2005-04-05 Dalhousie University Method for tracking particles and life forms in three dimensions and in time
US7638016B2 (en) 2005-02-19 2009-12-29 International Paper Company Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness
RU2386738C2 (en) 2005-02-19 2010-04-20 Интернэшнл Пэйпа Кампани Fixation of optic whiteners on fibre
CA2750039A1 (en) 2005-03-11 2006-09-21 International Paper Company Substrate comprising expandable microspheres
US8246780B2 (en) * 2005-09-19 2012-08-21 Nalco Company Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paper
KR101310192B1 (en) 2005-04-08 2013-09-25 날코 컴퍼니 Improved composition and processes for paper production
CN104109983A (en) 2005-05-24 2014-10-22 国际纸业公司 Modified kraft fibers
US7914646B2 (en) 2006-07-21 2011-03-29 Nalco Company Compositions and processes for paper production
EP1811080A1 (en) 2006-01-24 2007-07-25 Solvay SA Process for the bleaching of mechanical paper pulp
US7967948B2 (en) 2006-06-02 2011-06-28 International Paper Company Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents
KR101289038B1 (en) 2006-06-30 2013-07-23 엘지디스플레이 주식회사 bonding device and fa brication method of Light emitting device using thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11725338B2 (en) 2014-03-25 2023-08-15 Basf Se Method for producing bleached wood fibre material

Also Published As

Publication number Publication date
US20110315331A1 (en) 2011-12-29
CA2654187C (en) 2013-01-08
RU2424388C2 (en) 2011-07-20
WO2007143182A2 (en) 2007-12-13
EP2054548A2 (en) 2009-05-06
US20090145562A1 (en) 2009-06-11
WO2007143182A3 (en) 2008-03-06
US20080066878A1 (en) 2008-03-20
US7967948B2 (en) 2011-06-28
WO2007143182A9 (en) 2008-04-17
RU2008150426A (en) 2010-06-27
US20070277947A1 (en) 2007-12-06

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