WO2008076267A3 - A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2 - Google Patents

A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2 Download PDF

Info

Publication number
WO2008076267A3
WO2008076267A3 PCT/US2007/025373 US2007025373W WO2008076267A3 WO 2008076267 A3 WO2008076267 A3 WO 2008076267A3 US 2007025373 W US2007025373 W US 2007025373W WO 2008076267 A3 WO2008076267 A3 WO 2008076267A3
Authority
WO
WIPO (PCT)
Prior art keywords
bleaching
pulp
stage bleaching
softwood pulps
cio2
Prior art date
Application number
PCT/US2007/025373
Other languages
French (fr)
Other versions
WO2008076267A2 (en
Inventor
Caifang Yin
Kent Witherspoon
Original Assignee
Int Paper Co
Caifang Yin
Kent Witherspoon
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Int Paper Co, Caifang Yin, Kent Witherspoon filed Critical Int Paper Co
Priority to EP07862784A priority Critical patent/EP2122048A2/en
Priority to CA2671826A priority patent/CA2671826C/en
Publication of WO2008076267A2 publication Critical patent/WO2008076267A2/en
Publication of WO2008076267A3 publication Critical patent/WO2008076267A3/en

Links

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
    • D21C9/12—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
    • 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
    • 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

Abstract

This invention relates to an improved bleaching process for bleaching pulp comprising at least one bleaching stage which comprises treating a softwood pulp with a bleaching agent comprising CIO2 in the presence of a weak base such as, for example, Mg(OH)2 preferably at pH from about 3.5 to about 6.5. The invention is also relates a bleaching process for bleaching pulp having two or more bleaching stages, at least one of which and preferably two of which comprises treating a pulp with a bleaching agent comprising CIO2 in the presence of a weak base such as, for example, Mg(OH)2 preferably at pH from about 3.5 to about 4.5.
PCT/US2007/025373 2006-12-18 2007-12-12 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2 WO2008076267A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07862784A EP2122048A2 (en) 2006-12-18 2007-12-12 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2
CA2671826A CA2671826C (en) 2006-12-18 2007-12-12 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/640,822 2006-12-18
US11/640,822 US7976676B2 (en) 2006-12-18 2006-12-18 Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base

Publications (2)

Publication Number Publication Date
WO2008076267A2 WO2008076267A2 (en) 2008-06-26
WO2008076267A3 true WO2008076267A3 (en) 2008-08-14

Family

ID=39315131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/025373 WO2008076267A2 (en) 2006-12-18 2007-12-12 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2

Country Status (4)

Country Link
US (2) US7976676B2 (en)
EP (1) EP2122048A2 (en)
CA (1) CA2671826C (en)
WO (1) WO2008076267A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392380A (en) * 2005-05-04 2012-03-28 诺维信北美公司 Chlorine dioxide treatment combination and method thereof
US20110042022A1 (en) * 2008-03-25 2011-02-24 University Of Brunswick Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide
KR101797942B1 (en) 2009-05-28 2017-11-15 게페 첼루로제 게엠베하 Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
EP2714987B1 (en) 2011-05-23 2015-07-29 GP Cellulose GmbH Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same
CN104302831A (en) 2012-01-12 2015-01-21 Gp纤维素股份有限公司 Low viscosity kraft fiber having reduced yellowing properties and method of making and using same
US9617686B2 (en) 2012-04-18 2017-04-11 Gp Cellulose Gmbh Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products
US10151064B2 (en) 2013-02-08 2018-12-11 Gp Cellulose Gmbh Softwood kraft fiber having an improved α-cellulose content and its use in the production of chemical cellulose products
RU2671653C2 (en) 2013-03-14 2018-11-06 ДжиПи СЕЛЛЬЮЛОУС ГМБХ Method for manufacturing high functional low-viscosity kraft fibers with use of acid bleaching sequence and fiber produced therewith
CN105143547B (en) 2013-03-15 2018-05-01 Gp 纤维素股份有限公司 With low viscosity kraft fibers for increasing carboxyl-content and production and preparation method thereof
EP3541849B1 (en) 2016-11-16 2023-11-15 GP Cellulose GmbH Modified cellulose from chemical fiber and methods of making and using the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505076A (en) * 1974-06-11 1978-03-22 Canadian Ind Strenghening of mechanical pulp by chemical treatment
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
EP0716182A2 (en) * 1994-11-23 1996-06-12 Alcell Technologies Inc. Chlorine-free organosolv pulps
US6398908B1 (en) * 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
WO2002075046A1 (en) * 2001-03-20 2002-09-26 Metso Paper, Inc Bleaching of pulp with chlorine dioxide
US20040112555A1 (en) * 2002-12-03 2004-06-17 Jeffrey Tolan Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof
WO2006121634A2 (en) * 2005-05-09 2006-11-16 Amidon Thomas E New product and processes from an integrated forest biorefinery

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA756967A (en) * 1967-04-18 Anglo Paper Products Neutral chlorine dioxide pulp bleaching process
US2639987A (en) 1947-07-09 1953-05-26 Ass Pulp & Paper Mills Two-stage pulping process
GB815247A (en) * 1955-07-19 1959-06-24 Columbia Cellulose Company Ltd Bleaching woob pulps
SE363138B (en) 1968-06-13 1974-01-07 Air Liquide Sa Etude Exploit P
USRE28777E (en) * 1969-02-06 1976-04-20 Ethyl Corporation Refining of vegetable matter and delignification of the refined matter with chlorine dioxide
EP0279845A4 (en) 1986-08-28 1991-01-09 James River-Norwalk, Inc. Pulp bleaching process
US4859283A (en) 1988-04-15 1989-08-22 E. I. Du Pont De Nemours And Company Magnesium ions in a process for alkaline peroxide treatment of nonwoody lignocellulosic substrates
US5179021A (en) 1989-02-10 1993-01-12 Gil Inc. (Now Ici Canada Inc.) Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment
US5091054A (en) 1989-08-18 1992-02-25 Degussa Corporation Process for bleaching and delignification of lignocellulosic
EP0472820B1 (en) 1990-08-17 1997-10-29 Alcell Technologies Inc. Continuous solvent pulping process
SE502706E (en) 1994-04-05 1999-06-18 Mo Och Domsjoe Ab Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step
US5641385A (en) 1995-01-17 1997-06-24 The Dow Chemical Company Use of ethyleneamine for washing pulp containing lignin
US6056853A (en) 1996-06-13 2000-05-02 Orica Australia Pty. Ltd. Process for peroxide bleaching of pulp using MgO particles
US6569284B1 (en) 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage
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
BR9908832A (en) * 1998-03-16 2000-11-21 Pulp Paper Res Inst Process to improve delignification and / or brightening during bleaching of a lignocellulosic pulp
US6245196B1 (en) 1999-02-02 2001-06-12 Praxair Technology, Inc. Method and apparatus for pulp yield enhancement
US7052578B2 (en) 2000-01-28 2006-05-30 Martin Marietta Magnesia Specialties, Inc. Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
FI108234B (en) 2000-02-28 2001-12-14 Chempolis Oy Process for making pulp
US6743332B2 (en) 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US6881299B2 (en) 2001-05-16 2005-04-19 North American Paper Corporation Refiner bleaching with magnesium oxide and hydrogen peroxide
AU2003208216A1 (en) 2002-03-06 2003-09-16 Iogen Bio-Products Corporation Xylanase treatment of chemical pulp
JP2004124265A (en) * 2002-03-28 2004-04-22 Nippon Paper Industries Co Ltd Method for improving chlorine dioxide bleaching efficiency
SE521780C2 (en) * 2003-01-31 2003-12-09 Kvaerner Pulping Tech Method for bleaching cellulose pulp and bleaching line for this
SE524896C2 (en) 2003-03-07 2004-10-19 Kvaerner Pulping Tech Bleaching of cellulose pulp with chlorine dioxide in two phases with heating between the phases
US8317975B2 (en) * 2004-04-20 2012-11-27 The Research Foundation Of The State University Of New York Product and processes from an integrated forest biorefinery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505076A (en) * 1974-06-11 1978-03-22 Canadian Ind Strenghening of mechanical pulp by chemical treatment
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
US6398908B1 (en) * 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
EP0716182A2 (en) * 1994-11-23 1996-06-12 Alcell Technologies Inc. Chlorine-free organosolv pulps
WO2002075046A1 (en) * 2001-03-20 2002-09-26 Metso Paper, Inc Bleaching of pulp with chlorine dioxide
US20040112555A1 (en) * 2002-12-03 2004-06-17 Jeffrey Tolan Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof
WO2006121634A2 (en) * 2005-05-09 2006-11-16 Amidon Thomas E New product and processes from an integrated forest biorefinery

Also Published As

Publication number Publication date
US7976676B2 (en) 2011-07-12
EP2122048A2 (en) 2009-11-25
CA2671826A1 (en) 2008-06-26
WO2008076267A2 (en) 2008-06-26
US20110265964A1 (en) 2011-11-03
CA2671826C (en) 2013-03-19
US20080142174A1 (en) 2008-06-19

Similar Documents

Publication Publication Date Title
WO2008076267A3 (en) A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2
CL2019000489A1 (en) Modified bleached softwood kraft fiber. (divisional application 201103005)
CA2601926A1 (en) Pulp and paper having increased brightness
WO2007075576A3 (en) Pulp comprising polypyridobisimidazole and other polymers and methods of making same
WO2007087320A3 (en) Papermaking processes using coagulants and optical brighteners
WO2008011523A3 (en) Improved compositions and processes for paper production
WO2009088635A3 (en) Enzymatic treatment of pulp for lyocell manufacture
MY177088A (en) Improved compositions and processes for paper production
EP0892865A1 (en) Method for bleaching of lignocellulosic fibers
WO2008076268A3 (en) A process in a (d) stage bleaching of hardwood pulps in a presence of mg(oh)2
EP1862587A3 (en) Chemical activation and refining of southern pine kraft fibers
MXPA04005021A (en) Papermaking process using enzyme-treated sludge, and products.
WO2005080672A3 (en) Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps
WO2005060712A3 (en) Processes for foreshortening fibrous structures
WO2006014563A3 (en) Use of cyclodextrin for reducing yellowing of pulp and paper
WO2008060519A3 (en) An improved bleaching process with at least one extraction stage
NO20023331L (en) Procedure for Improving Printability and Coatability of Paper and Cardboard
ATE462825T1 (en) USE OF CARBONATIONS FOR SOLUBILIZATION OF RESIN IN A PROCESS FOR DERESINING A PULP
WO2007070527A3 (en) Process for treating a cellulose-lignin pulp
WO2007118264A3 (en) Method for treating a cellulosic fiber material
JP5478610B2 (en) Pulp bleaching method using ozone, chlorine dioxide and peroxide
EA200970367A1 (en) BLEACHING OF CELLULOSE
MXPA03011326A (en) Method and aqueous composition for the production of improved pulp.
NO20091573L (en) Pulp processing
WO2006028499A3 (en) Methods of processing lignocellulosic pulp with cavitation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07862784

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2007862784

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2671826

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE