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 PDFInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0520253B1 (en) * | 2005-05-04 | 2016-09-06 | Novozymes As | methods for delignifying and / or bleaching a pulp, and for treating tailings and / or sludge water |
WO2009117818A1 (en) * | 2008-03-25 | 2009-10-01 | University Of New Brunswick | Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide |
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 |
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 |
KR101728910B1 (en) | 2009-05-28 | 2017-04-20 | 게페 첼루로제 게엠베하 | Modified cellulose from chemical kraft fiber and methods of making and using the same |
KR101918470B1 (en) | 2011-05-23 | 2018-11-14 | 게페 첼루로제 게엠베하 | Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same |
BR112014017164A8 (en) | 2012-01-12 | 2017-07-04 | Gp Cellulose Gmbh | method for producing oxidized kraft pulp and softwood kraft fibers |
PL2839071T3 (en) | 2012-04-18 | 2019-05-31 | Gp Cellulose Gmbh | The 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 |
PL2954115T3 (en) | 2013-02-08 | 2022-05-02 | Gp Cellulose Gmbh | Softwood kraft fiber having an improved a-cellulose content and its use in the production of chemical cellulose products |
AU2014229520B2 (en) | 2013-03-14 | 2017-09-21 | Gp Cellulose Gmbh | A method of making highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process |
RU2661836C2 (en) | 2013-03-15 | 2018-07-19 | ДжиПи СЕЛЛЬЮЛОУС ГМБХ | Low viscosity kraft fibre having higher carboxyl content and methods of making and using same |
CA3040734A1 (en) | 2016-11-16 | 2018-05-24 | Gp Cellulose Gmbh | Modified cellulose from chemical fiber and methods of making and using the same |
Citations (7)
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)
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 |
CA2321683C (en) * | 1998-03-16 | 2005-09-27 | Pulp And Paper Research Institute Of Canada | Additives to chlorine dioxide bleaching |
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 |
US6881299B2 (en) * | 2001-05-16 | 2005-04-19 | North American Paper Corporation | Refiner bleaching with magnesium oxide and hydrogen peroxide |
US6743332B2 (en) * | 2001-05-16 | 2004-06-01 | Weyerhaeuser Company | High temperature peroxide bleaching of mechanical pulps |
CA2477847A1 (en) | 2002-03-06 | 2003-09-12 | 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 |
-
2006
- 2006-12-18 US US11/640,822 patent/US7976676B2/en active Active
-
2007
- 2007-12-12 WO PCT/US2007/025373 patent/WO2008076267A2/en active Application Filing
- 2007-12-12 CA CA2671826A patent/CA2671826C/en active Active
- 2007-12-12 EP EP07862784A patent/EP2122048A2/en not_active Withdrawn
-
2011
- 2011-06-21 US US13/165,099 patent/US20110265964A1/en not_active Abandoned
Patent Citations (7)
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 |
---|---|
CA2671826A1 (en) | 2008-06-26 |
US20080142174A1 (en) | 2008-06-19 |
US7976676B2 (en) | 2011-07-12 |
CA2671826C (en) | 2013-03-19 |
US20110265964A1 (en) | 2011-11-03 |
EP2122048A2 (en) | 2009-11-25 |
WO2008076267A2 (en) | 2008-06-26 |
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