CO5611215A2 - PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE - Google Patents
PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSEInfo
- Publication number
- CO5611215A2 CO5611215A2 CO04106973A CO04106973A CO5611215A2 CO 5611215 A2 CO5611215 A2 CO 5611215A2 CO 04106973 A CO04106973 A CO 04106973A CO 04106973 A CO04106973 A CO 04106973A CO 5611215 A2 CO5611215 A2 CO 5611215A2
- Authority
- CO
- Colombia
- Prior art keywords
- pulp
- process according
- treatment
- chelating agent
- lignocellulose
- 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
-
- 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
- D21C9/1042—Use of chelating agents
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
1.- Un proceso para blanquear pulpa que contiene lignocelulosa que comprende pulpa obtenible de materiales que contienen lignocelulosa seleccionados del grupo que consiste de material no maderable con un compuesto que contiene peróxido, donde la pulpa antes del blanqueo es tratada con dióxido de cloro, caracterizada por que la pulpa después el tratamiento con dióxido de cloro es tratada en una etapa separada con un agente quelante a un pH hasta de aproximadamente 2,9 y lavada entre el tratamiento con dióxido de cloro y el tratamiento con agente quelante.2.- Un proceso de acuerdo a la reivindicación 1, caracterizado por que la pulpa que contiene lignocelulosa contiene al menos 500 ppm de sílice.3.- Un proceso de acuerdo a la reivindicación 1, caracterizado por que la pulpa es obtenible de materiales que contienen lignocelulosa seleccionados del grupo que consiste de trigo y junco mezclas de estos.4.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que el compuesto que contiene peróxido es peróxido de hidrógeno.5.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes caracterizado por que el pH en el tratamiento con agente quelante va desde aproximadamente 1,5 hasta aproximadamente 2,5.6.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que el agente quelante se selecciona del grupo que consiste de compuestos orgánicos nitrogenados.7.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que la pulpa se lava después del tratamiento con un agente quelante.8.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que la pulpa después del blanqueo con el compuesto que contiene peróxido es adicionalmente blanqueada en una o más etapas hasta un brillo de al menos aproximadamente 85% ISO.1. A process for bleaching pulp containing lignocellulose comprising pulp obtainable from materials containing lignocellulose selected from the group consisting of non-timber material with a peroxide-containing compound, where the pulp before bleaching is treated with chlorine dioxide, characterized because the pulp after treatment with chlorine dioxide is treated in a separate stage with a chelating agent at a pH of up to about 2.9 and washed between the treatment with chlorine dioxide and the treatment with chelating agent.2.- A process according to claim 1, characterized in that the pulp containing lignocellulose contains at least 500 ppm of silica.3.- A process according to claim 1, characterized in that the pulp is obtainable from lignocellulose containing materials selected from the group consisting of wheat and reed mixtures of these. 4. A process according to any of the preceding claims, characterize It is curved that the peroxide-containing compound is hydrogen peroxide. 5. A process according to any of the preceding claims characterized in that the pH in the treatment with chelating agent ranges from about 1.5 to about 2.5.6.- A process according to any of the preceding claims, characterized in that the chelating agent is selected from the group consisting of nitrogenous organic compounds.7.- A process according to any of the preceding claims, characterized in that the pulp is then washed of the treatment with a chelating agent. 8. A process according to any of the preceding claims, characterized in that the pulp after bleaching with the peroxide-containing compound is further bleached in one or more stages to a brightness of at least about 85% ISO
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0200981A SE0200981D0 (en) | 2002-03-28 | 2002-03-28 | Process for bleaching lignocellulose-containing non-wood pulp |
PCT/SE2003/000512 WO2003083208A1 (en) | 2002-03-28 | 2003-03-27 | Process for bleaching lignocellulose-containing non-wood pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
CO5611215A2 true CO5611215A2 (en) | 2006-02-28 |
Family
ID=20287449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CO04106973A CO5611215A2 (en) | 2002-03-28 | 2004-10-25 | PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN1312354C (en) |
AU (1) | AU2003216028B2 (en) |
CO (1) | CO5611215A2 (en) |
SE (1) | SE0200981D0 (en) |
WO (1) | WO2003083208A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050051288A1 (en) * | 2003-09-09 | 2005-03-10 | Caifang Yin | Extended retention and medium consistency pulp treatment |
FI123102B (en) * | 2006-03-31 | 2012-11-15 | Laennen Tutkimus Western Res Inc Oy | Chemical pulp bleaching process |
FI122626B (en) * | 2006-03-31 | 2012-04-30 | Laennen Tutkimus Western Res Inc Oy | Chemical pulp bleaching process |
JP4967451B2 (en) | 2006-05-17 | 2012-07-04 | 三菱瓦斯化学株式会社 | Method for producing bleached pulp |
CN101451313B (en) * | 2007-12-05 | 2012-01-25 | 山东福荫造纸环保科技有限公司 | Method for preparing bleached chemical pulp by using grass type plants as raw materials |
CN101451312B (en) * | 2007-12-05 | 2012-05-02 | 山东福荫造纸环保科技有限公司 | Method for preparing bleached chemical pulp by using grass type plants as raw materials |
CN101812812B (en) * | 2009-02-25 | 2012-08-08 | 山东福荫造纸环保科技有限公司 | Elemental chlorine free bleaching method for plant fiber stuff |
CN104179056A (en) * | 2013-05-23 | 2014-12-03 | 中国制浆造纸研究院 | Wheat straw pulp elemental-chlorine-free bleaching wastewater recycling method |
CN104928964B (en) * | 2014-03-18 | 2017-02-15 | 中国科学院大连化学物理研究所 | Method for reducing generation of dioxins in non-wood pulp papermaking chlorine bleaching process |
KR101806632B1 (en) * | 2015-12-04 | 2018-01-11 | 현대자동차주식회사 | Wet paper friction material |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69420306T2 (en) * | 1993-04-20 | 2000-04-20 | Eka Chemicals Ab | Process for bleaching lignocellulosic pulp |
SE502706E (en) * | 1994-04-05 | 1999-09-27 | Mo Och Domsjoe Ab | Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step |
SE514697C2 (en) * | 1994-08-31 | 2001-04-02 | Valmet Fibertech Ab | Elimination of metal ions in pulp bleaching |
SE507742C2 (en) * | 1996-11-08 | 1998-07-06 | Sunds Defibrator Ind Ab | Bleaching of pulp with chlorine dioxide, alkali and complexing agents without intermediate washes |
US6302997B1 (en) * | 1999-08-30 | 2001-10-16 | North Carolina State University | Process for producing a pulp suitable for papermaking from nonwood fibrous materials |
-
2002
- 2002-03-28 SE SE0200981A patent/SE0200981D0/en unknown
-
2003
- 2003-03-27 AU AU2003216028A patent/AU2003216028B2/en not_active Ceased
- 2003-03-27 CN CNB038072785A patent/CN1312354C/en not_active Expired - Fee Related
- 2003-03-27 WO PCT/SE2003/000512 patent/WO2003083208A1/en not_active Application Discontinuation
-
2004
- 2004-10-25 CO CO04106973A patent/CO5611215A2/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
AU2003216028B2 (en) | 2006-03-16 |
AU2003216028A1 (en) | 2003-10-13 |
CN1643209A (en) | 2005-07-20 |
SE0200981D0 (en) | 2002-03-28 |
WO2003083208A1 (en) | 2003-10-09 |
CN1312354C (en) | 2007-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Application granted |