EA200970367A1 - Отбеливание целлюлозы - Google Patents
Отбеливание целлюлозыInfo
- Publication number
- EA200970367A1 EA200970367A1 EA200970367A EA200970367A EA200970367A1 EA 200970367 A1 EA200970367 A1 EA 200970367A1 EA 200970367 A EA200970367 A EA 200970367A EA 200970367 A EA200970367 A EA 200970367A EA 200970367 A1 EA200970367 A1 EA 200970367A1
- Authority
- EA
- Eurasian Patent Office
- Prior art keywords
- chlorine dioxide
- bleaching
- pulp
- relates
- final
- 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
- D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Настоящее изобретение относится к способу отбеливания целлюлозы, полученной способом щелочной варки, имеющей содержание гексуроновой кислоты перед конечной стадией отбеливания от приблизительно 1 до приблизительно 80 ммоль/кг сухой целлюлозы, причем указанный способ содержит три хлордиоксидные стадии D0, D1 и D2, где загрузка диоксида хлора по отношению к общей загрузке диоксида хлора в a) D0 составляет от приблизительно 40 до приблизительно 60%; b) D1 составляет от приблизительно 30 до приблизительно 55%; с) D2 составляет от приблизительно 4 до приблизительно 20% и где конечную хлордиоксидную стадию D2 осуществляют при рН от приблизительно 2 до приблизительно 4,5. Изобретение также относится к отбеленной целлюлозе, полученной настоящим способом.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06122119 | 2006-10-11 | ||
| PCT/SE2007/050630 WO2008044988A1 (en) | 2006-10-11 | 2007-09-06 | Bleaching of pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EA200970367A1 true EA200970367A1 (ru) | 2009-08-28 |
| EA013901B1 EA013901B1 (ru) | 2010-08-30 |
Family
ID=37807769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EA200970367A EA013901B1 (ru) | 2006-10-11 | 2007-09-06 | Отбеливание целлюлозы |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP2082096B1 (ru) |
| AR (1) | AR063160A1 (ru) |
| BR (1) | BRPI0719893A2 (ru) |
| CA (1) | CA2665969C (ru) |
| CL (1) | CL2007002906A1 (ru) |
| EA (1) | EA013901B1 (ru) |
| ES (1) | ES2403371T3 (ru) |
| NO (1) | NO20091815L (ru) |
| PT (1) | PT2082096E (ru) |
| UY (1) | UY30634A1 (ru) |
| WO (1) | WO2008044988A1 (ru) |
| ZA (1) | ZA200903205B (ru) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20105862A0 (fi) | 2010-08-18 | 2010-08-18 | Bo Akademi University | Menetelmä hekseeniuronihappojen poistamiseksi |
| WO2015018908A1 (en) | 2013-08-09 | 2015-02-12 | Novozymes A/S | Reducing content of hexenuronic acids in cellulosic pulp |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3501374A (en) * | 1968-12-26 | 1970-03-17 | Hooker Chemical Corp | Sequential bleaching of kraft pulp with chlorine dioxide and chlorine |
| US5268075A (en) * | 1989-10-19 | 1993-12-07 | North Carolina State University | High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process |
| US5030324A (en) * | 1990-01-29 | 1991-07-09 | Champion International Corporation | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
| US6776876B1 (en) * | 1994-10-13 | 2004-08-17 | Andritz Oy | Method of treating cellulosic pulp to remove hexenuronic acid |
| FI119383B (fi) * | 1998-03-06 | 2008-10-31 | Andritz Oy | Menetelmä massan käsittelemiseksi |
| JP2004522008A (ja) * | 2001-06-06 | 2004-07-22 | クヴアナ・パルピング・アクチボラグ | 二酸化塩素漂白で形成された有機結合塩素の低減 |
| US20060201642A1 (en) * | 2005-03-08 | 2006-09-14 | Andritz Inc. | Methods of treating chemical cellulose pulp |
-
2007
- 2007-09-06 CA CA2665969A patent/CA2665969C/en not_active Expired - Fee Related
- 2007-09-06 BR BRPI0719893-0A2A patent/BRPI0719893A2/pt not_active Application Discontinuation
- 2007-09-06 ES ES07808867T patent/ES2403371T3/es active Active
- 2007-09-06 EP EP07808867A patent/EP2082096B1/en not_active Not-in-force
- 2007-09-06 PT PT07808867T patent/PT2082096E/pt unknown
- 2007-09-06 WO PCT/SE2007/050630 patent/WO2008044988A1/en active Application Filing
- 2007-09-06 EA EA200970367A patent/EA013901B1/ru not_active IP Right Cessation
- 2007-10-08 UY UY30634A patent/UY30634A1/es not_active Application Discontinuation
- 2007-10-09 CL CL2007002906A patent/CL2007002906A1/es unknown
- 2007-10-09 AR ARP070104434 patent/AR063160A1/es active IP Right Grant
-
2009
- 2009-05-08 ZA ZA200903205A patent/ZA200903205B/xx unknown
- 2009-05-08 NO NO20091815A patent/NO20091815L/no not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EA013901B1 (ru) | 2010-08-30 |
| NO20091815L (no) | 2009-07-10 |
| ES2403371T3 (es) | 2013-05-17 |
| BRPI0719893A2 (pt) | 2014-05-06 |
| CA2665969A1 (en) | 2008-04-17 |
| EP2082096B1 (en) | 2013-02-20 |
| UY30634A1 (es) | 2007-11-30 |
| PT2082096E (pt) | 2013-04-26 |
| ZA200903205B (en) | 2010-03-31 |
| CA2665969C (en) | 2016-04-12 |
| AR063160A1 (es) | 2008-12-30 |
| WO2008044988A1 (en) | 2008-04-17 |
| EP2082096A1 (en) | 2009-07-29 |
| CL2007002906A1 (es) | 2008-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s) |
Designated state(s): AM AZ BY KZ KG MD TJ TM |
|
| PC4A | Registration of transfer of a eurasian patent by assignment | ||
| MM4A | Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s) |
Designated state(s): RU |