PL309190A1 - Method of bleaching a lignocellulose containing pulp - Google Patents
Method of bleaching a lignocellulose containing pulpInfo
- Publication number
- PL309190A1 PL309190A1 PL93309190A PL30919093A PL309190A1 PL 309190 A1 PL309190 A1 PL 309190A1 PL 93309190 A PL93309190 A PL 93309190A PL 30919093 A PL30919093 A PL 30919093A PL 309190 A1 PL309190 A1 PL 309190A1
- Authority
- PL
- Poland
- Prior art keywords
- pulp
- bleaching
- brightness
- stages
- 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
- D21C9/1026—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
- 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
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The present invention relates to a process for bleaching of lignocellulose-containing pulp, where the pulp is first treated with a complexing agent, then delignified with an organic peracid or a salt thereof, and subsequently bleached with a peroxide-containing compound, ozone or sodium dithionite. Before bleaching, the pulp is washed at a pH of at least about 4. Suitably, delignification is performed with the strongly oxidizing peracetic acid, so that a considerable increase in brightness as well as a considerable reduction of the kappa number are obtained after said bleaching. The brightness-increasing effect is very selective, i.e. the viscosity of the pulp is maintained to a relatively great extent. By a suitable choice of pH in all the stages before the chlorine-free bleaching, the advantageous metal ions are retained in the pulp, while at the same time the pH adjustment between the stages is minimized and the resulting spent bleach liquors are advantageously used internally, e.g. for washing the pulp.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9203584A SE9203584D0 (en) | 1992-11-27 | 1992-11-27 | PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MACHINE |
| SE9300225A SE9300225D0 (en) | 1993-01-26 | 1993-01-26 | PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MACHINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL309190A1 true PL309190A1 (en) | 1995-09-18 |
Family
ID=26661599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL93309190A PL309190A1 (en) | 1992-11-27 | 1993-11-25 | Method of bleaching a lignocellulose containing pulp |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0670929B2 (en) |
| JP (1) | JPH08503749A (en) |
| AT (1) | ATE141972T1 (en) |
| AU (1) | AU671337B2 (en) |
| BR (1) | BR9307520A (en) |
| CA (1) | CA2149649C (en) |
| CZ (1) | CZ285246B6 (en) |
| DE (1) | DE69304342T3 (en) |
| ES (1) | ES2091121T3 (en) |
| FI (1) | FI118572B (en) |
| MX (1) | MX9307413A (en) |
| NO (1) | NO306737B1 (en) |
| NZ (1) | NZ258273A (en) |
| PL (1) | PL309190A1 (en) |
| RU (1) | RU2097463C1 (en) |
| WO (1) | WO1994012722A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1007757A3 (en) * | 1993-11-10 | 1995-10-17 | Solvay Interox | Method of laundering of chemical pulp. |
| US5656130A (en) * | 1995-04-28 | 1997-08-12 | Union Camp Holding, Inc. | Ambient temperature pulp bleaching with peroxyacid salts |
| USH1690H (en) * | 1995-07-20 | 1997-11-04 | Nye; Jeffrey | Process for bleaching kraft pulp |
| SE9503004L (en) * | 1995-08-30 | 1997-03-01 | Sunds Defibrator Ind Ab | Bleaching of pulp |
| DE19704054C2 (en) | 1997-02-04 | 2000-08-10 | Stockhausen Chem Fab Gmbh | Process for the production of fibrous materials with improved properties |
| US6702921B2 (en) * | 2001-05-01 | 2004-03-09 | Ondeo Nalco Company | Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent |
| PT1607519E (en) * | 2004-06-14 | 2008-04-16 | Warwick Internat Group Ltd | Activator for pulp bleaching |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2219505C3 (en) † | 1972-04-21 | 1974-10-17 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Chlorine-free multi-stage bleaching of cellulose |
| DE3005947B1 (en) † | 1980-02-16 | 1981-01-29 | Degussa | Process for bleaching pulp using organic peracid |
| JPS5721591A (en) † | 1980-07-11 | 1982-02-04 | Mitsubishi Gas Chemical Co | Peroxide bleaching of wood pulp |
| ES2038097T5 (en) * | 1989-06-06 | 2001-05-01 | Eka Chemicals Ab | PROCEDURE FOR WHITENING PAPER PASTES CONTAINING LIGNOCELLULOSE. |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
| BE1004674A3 (en) * | 1991-03-11 | 1993-01-12 | Interox Internat Sa | Method of laundering of chemical pulp and application of the method of laundering pulp kraft. |
| DE4114135A1 (en) † | 1991-04-30 | 1992-11-05 | Sueddeutsche Kalkstickstoff | Chlorine-free bleaching and delignification of alkali cellulose - by first treating with aq. organic peracid soln. and then with cyanamide (salt) activated hydrogen peroxide soln. |
| EP0844328A3 (en) * | 1991-10-04 | 1998-07-15 | Solvay Interox, Inc. | Process for improving the selectivity in the delignification of a chemical pulp |
| BE1006057A3 (en) † | 1992-07-06 | 1994-05-03 | Solvay Interox | Method for delignification of chemical pulp. |
-
1993
- 1993-11-25 NZ NZ258273A patent/NZ258273A/en unknown
- 1993-11-25 EP EP94901142A patent/EP0670929B2/en not_active Expired - Lifetime
- 1993-11-25 JP JP6513051A patent/JPH08503749A/en active Pending
- 1993-11-25 AU AU55831/94A patent/AU671337B2/en not_active Ceased
- 1993-11-25 BR BR9307520-0A patent/BR9307520A/en not_active IP Right Cessation
- 1993-11-25 CA CA002149649A patent/CA2149649C/en not_active Expired - Fee Related
- 1993-11-25 ES ES94901142T patent/ES2091121T3/en not_active Expired - Lifetime
- 1993-11-25 RU RU9595113460A patent/RU2097463C1/en active
- 1993-11-25 CZ CZ951328A patent/CZ285246B6/en not_active IP Right Cessation
- 1993-11-25 MX MX9307413A patent/MX9307413A/en not_active IP Right Cessation
- 1993-11-25 AT AT94901142T patent/ATE141972T1/en not_active IP Right Cessation
- 1993-11-25 PL PL93309190A patent/PL309190A1/en unknown
- 1993-11-25 WO PCT/SE1993/001018 patent/WO1994012722A1/en active IP Right Grant
- 1993-11-25 DE DE69304342T patent/DE69304342T3/en not_active Expired - Fee Related
-
1995
- 1995-05-24 FI FI952551A patent/FI118572B/en active IP Right Grant
- 1995-05-26 NO NO952074A patent/NO306737B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI952551A (en) | 1995-05-24 |
| NO952074L (en) | 1995-07-26 |
| NZ258273A (en) | 1996-08-27 |
| ES2091121T3 (en) | 1996-10-16 |
| FI118572B (en) | 2007-12-31 |
| RU2097463C1 (en) | 1997-11-27 |
| EP0670929B1 (en) | 1996-08-28 |
| JPH08503749A (en) | 1996-04-23 |
| EP0670929A1 (en) | 1995-09-13 |
| RU95113460A (en) | 1996-12-27 |
| DE69304342D1 (en) | 1996-10-02 |
| WO1994012722A1 (en) | 1994-06-09 |
| NO952074D0 (en) | 1995-05-26 |
| DE69304342T2 (en) | 1997-03-06 |
| BR9307520A (en) | 1999-08-31 |
| CZ285246B6 (en) | 1999-06-16 |
| NO306737B1 (en) | 1999-12-13 |
| CZ132895A3 (en) | 1996-01-17 |
| DE69304342T3 (en) | 2004-07-01 |
| MX9307413A (en) | 1994-07-29 |
| EP0670929B2 (en) | 2003-10-22 |
| AU671337B2 (en) | 1996-08-22 |
| FI952551A0 (en) | 1995-05-24 |
| CA2149649C (en) | 2000-09-19 |
| ATE141972T1 (en) | 1996-09-15 |
| AU5583194A (en) | 1994-06-22 |
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