NO920829D0 - PROCEDURE FOR WHITE CELLULOSE IN ALIFATIC MONOCARBOXYLIC ACIDS - Google Patents
PROCEDURE FOR WHITE CELLULOSE IN ALIFATIC MONOCARBOXYLIC ACIDSInfo
- Publication number
- NO920829D0 NO920829D0 NO920829A NO920829A NO920829D0 NO 920829 D0 NO920829 D0 NO 920829D0 NO 920829 A NO920829 A NO 920829A NO 920829 A NO920829 A NO 920829A NO 920829 D0 NO920829 D0 NO 920829D0
- Authority
- NO
- Norway
- Prior art keywords
- monocarboxylic acids
- alifatic
- procedure
- white cellulose
- stage
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/003—Pulping cellulose-containing materials with organic compounds
-
- 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- External Artificial Organs (AREA)
Abstract
In this two-stage process for bleaching pulps, the pulp is bleached in a first stage in aliphatic monocarboxylic acids at an elevated temperature and under an elevated pressure, with addition of nitric acid. After washing or extraction with water or with the bleaching solution, a treatment of the pulp with an ozone-containing gas is carried out in the second stage.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4107356A DE4107356C1 (en) | 1991-03-08 | 1991-03-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO920829D0 true NO920829D0 (en) | 1992-03-03 |
NO920829L NO920829L (en) | 1992-09-09 |
Family
ID=6426710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO92920829A NO920829L (en) | 1991-03-08 | 1992-03-03 | PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0503303B1 (en) |
AT (1) | ATE131886T1 (en) |
CA (1) | CA2062325A1 (en) |
DE (2) | DE4107356C1 (en) |
FI (1) | FI920832A (en) |
NO (1) | NO920829L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2391011A (en) * | 2002-07-19 | 2004-01-28 | Crosmill Ltd | Bleaching cellulose suspensions |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2183643A (en) * | 1936-05-05 | 1939-12-19 | Manufacture of cellulose | |
GB579669A (en) * | 1943-11-05 | 1946-08-12 | Stanley Charles Bate | Improvements in or relating to the production of cellulose |
US3553076A (en) * | 1968-01-22 | 1971-01-05 | Weyerhaeuser Co | Non-catalytic process for the production of cellulose from lignocellulosic materials using acetic acid |
DE3118384C1 (en) * | 1981-05-09 | 1982-11-11 | Mannesmann AG, 4000 Düsseldorf | Process for bleaching chemically produced pulp with ozone |
DE3445132A1 (en) * | 1984-12-11 | 1986-06-12 | Nimz, Horst H., Prof.Dr., 2050 Hamburg | Wood pulping with acetic acid |
EP0325891A1 (en) * | 1988-01-25 | 1989-08-02 | Kunz Holding Gmbh & Co. Kg | Process for obtaining bleached cellulose pulp |
-
1991
- 1991-03-08 DE DE4107356A patent/DE4107356C1/de not_active Expired - Lifetime
-
1992
- 1992-02-14 AT AT92102469T patent/ATE131886T1/en not_active IP Right Cessation
- 1992-02-14 DE DE59204715T patent/DE59204715D1/en not_active Expired - Fee Related
- 1992-02-14 EP EP92102469A patent/EP0503303B1/en not_active Expired - Lifetime
- 1992-02-25 FI FI920832A patent/FI920832A/en not_active Application Discontinuation
- 1992-03-03 NO NO92920829A patent/NO920829L/en unknown
- 1992-03-05 CA CA002062325A patent/CA2062325A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
NO920829L (en) | 1992-09-09 |
DE4107356C1 (en) | 1992-11-05 |
EP0503303A1 (en) | 1992-09-16 |
ATE131886T1 (en) | 1996-01-15 |
FI920832A0 (en) | 1992-02-25 |
FI920832A (en) | 1992-09-09 |
CA2062325A1 (en) | 1992-09-09 |
DE59204715D1 (en) | 1996-02-01 |
EP0503303B1 (en) | 1995-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE7902901L (en) | OXYGEN LIGNIFIED BLOCK, CELLULOSIZED PULP WITH OZON | |
FI952552A0 (en) | Method for delignifying lignocellulosic pulp | |
SE9503595D0 (en) | Method of treating cellulose pulps | |
ATE48290T1 (en) | PROCESSES FOR DELIGNIFICATION AND BLEACHING OF PULP. | |
SE9400277L (en) | oxygen / ozone / peracetic acid delignification and bleaching of cellulose pulp | |
NO881404L (en) | WHITE MECHANICAL TREMASS. | |
SE8003911L (en) | PROCEDURE FOR CELLULOSAMAS Oxygen Bleaching | |
ES2073880T3 (en) | BLEACHING PROCEDURE OF PLANT MATTERS IN TWO STAGES. | |
ATE106961T1 (en) | BLEACHING PROCESS FOR THE PRODUCTION OF HIGH WHITE PULP. | |
NO920829D0 (en) | PROCEDURE FOR WHITE CELLULOSE IN ALIFATIC MONOCARBOXYLIC ACIDS | |
YU23892A (en) | PROCESS FOR BLEACHING CHEMICAL PAPER PAPER AND APPLICATION OF THIS PROCEDURE FOR BLEACHING KRAFT PULP | |
DE68928822T2 (en) | Process for the production of bleached chemithermomechanical pulps | |
SE8107858L (en) | PROCEDURE FOR DELIGNIFICATING WHITE CELLULOSAMASSA | |
SE9403074D0 (en) | Pulp bleaching process | |
ATE103649T1 (en) | PROCESS FOR CHLORINE-FREE BLEACHING AND DELIGNIFICATION OF PULP. | |
DE59105105D1 (en) | Process for low-chlorine bleaching and delignification of cellulose. | |
RU96124423A (en) | CELLULOSE BLEACHING METHOD | |
SE9002001L (en) | METHOD FOR SUPPLYING WATER PEROXIDE IN CELLULOSA PENSIONS | |
SE9203585L (en) | Delignification and bleaching of lignocellulosic pulp with peracid and chlorine-free bleach | |
PT83751A (en) | Improved process for the delignification and bleaching of a cellulose pulp with an alkali-oxygen-hypochlorite extraction |