NO913848L - PROCEDURE FOR CHLORINE WHITE AND DELIGNIFICATION OF CELLULOSE - Google Patents
PROCEDURE FOR CHLORINE WHITE AND DELIGNIFICATION OF CELLULOSEInfo
- Publication number
- NO913848L NO913848L NO91913848A NO913848A NO913848L NO 913848 L NO913848 L NO 913848L NO 91913848 A NO91913848 A NO 91913848A NO 913848 A NO913848 A NO 913848A NO 913848 L NO913848 L NO 913848L
- Authority
- NO
- Norway
- Prior art keywords
- delignification
- chlorine
- cellulose
- procedure
- pulp
- 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
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
-
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Detergent Compositions (AREA)
- General Preparation And Processing Of Foods (AREA)
- Cereal-Derived Products (AREA)
- Jellies, Jams, And Syrups (AREA)
Abstract
A process for low-chlorine bleaching and delignification of pulp is described, a pulp prebleached in an at least two-stage bleaching sequence being treated in an extractive final bleach separately with an aqueous solution of cyanamide and an alkaline solution of hydrogen peroxide. In this way, pulps of high degrees of whiteness can be produced in a chlorine-free final bleach.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4031597A DE4031597A1 (en) | 1990-10-05 | 1990-10-05 | METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR |
Publications (2)
Publication Number | Publication Date |
---|---|
NO913848D0 NO913848D0 (en) | 1991-10-01 |
NO913848L true NO913848L (en) | 1992-04-06 |
Family
ID=6415688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO91913848A NO913848L (en) | 1990-10-05 | 1991-10-01 | PROCEDURE FOR CHLORINE WHITE AND DELIGNIFICATION OF CELLULOSE |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0479319B1 (en) |
AT (1) | ATE120815T1 (en) |
CA (1) | CA2052758A1 (en) |
DE (2) | DE4031597A1 (en) |
ES (1) | ES2070388T3 (en) |
FI (1) | FI914694A (en) |
NO (1) | NO913848L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009045628A1 (en) | 2009-10-13 | 2011-04-14 | Henkel Ag & Co. Kgaa | Bleach activators for processes for bleaching cellulosic fibers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE664257C (en) * | 1929-09-11 | 1938-08-25 | Degussa | Process for upgrading cellulose |
AT167849B (en) * | 1945-01-10 | 1951-03-10 | Buffalo Electro Chem Co | Process for bleaching wood pulp |
AT183646B (en) * | 1950-06-30 | 1955-10-25 | Buffalo Electro Chem Co | Process for bleaching sulphate or sulphite pulp |
DE2742262C2 (en) * | 1977-09-20 | 1982-06-09 | Degussa Ag, 6000 Frankfurt | Process for the production of a medium to high viscosity softwood sulphite pulp |
US4568420B1 (en) * | 1984-12-03 | 1999-03-02 | Int Paper Co | Multi-stage bleaching process including an enhanced oxidative extraction stage |
FR2589494B1 (en) * | 1985-10-30 | 1988-07-29 | Atochem | PROCESS FOR BLEACHING CHEMICAL PAPER PULP |
DE3544398A1 (en) * | 1985-12-16 | 1987-06-19 | Sueddeutsche Kalkstickstoff | METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS |
DE4004364A1 (en) * | 1990-02-13 | 1991-08-14 | Sueddeutsche Kalkstickstoff | Bleaching and delignifying pre-balanced cellulose - in two stages with peroxide activated with cyanamide or cyanamide salt, avoiding agents contg. chlorine |
-
1990
- 1990-10-05 DE DE4031597A patent/DE4031597A1/en not_active Withdrawn
-
1991
- 1991-10-01 NO NO91913848A patent/NO913848L/en unknown
- 1991-10-03 CA CA002052758A patent/CA2052758A1/en not_active Abandoned
- 1991-10-04 EP EP91116992A patent/EP0479319B1/en not_active Expired - Lifetime
- 1991-10-04 ES ES91116992T patent/ES2070388T3/en not_active Expired - Lifetime
- 1991-10-04 FI FI914694A patent/FI914694A/en not_active Application Discontinuation
- 1991-10-04 AT AT91116992T patent/ATE120815T1/en not_active IP Right Cessation
- 1991-10-04 DE DE59105105T patent/DE59105105D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FI914694A0 (en) | 1991-10-04 |
ES2070388T3 (en) | 1995-06-01 |
NO913848D0 (en) | 1991-10-01 |
CA2052758A1 (en) | 1992-04-06 |
DE4031597A1 (en) | 1992-04-09 |
FI914694A (en) | 1992-04-06 |
DE59105105D1 (en) | 1995-05-11 |
EP0479319B1 (en) | 1995-04-05 |
ATE120815T1 (en) | 1995-04-15 |
EP0479319A1 (en) | 1992-04-08 |
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